#include <afs/param.h>
#include <afs/stds.h>
-#ifndef DJGPP
#include <windows.h>
#include <winsock2.h>
-#endif /* !DJGPP */
#include <stddef.h>
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
+#include <errno.h>
#include <osi.h>
extern void afsi_log(char *pattern, ...);
#endif
-unsigned int cm_mountRootGen = 0;
+int cm_enableServerLocks = 1;
/*
* Case-folding array. This was constructed by inspecting of SMBtrace output.
*/
int cm_stricmp(const char *str1, const char *str2)
{
- char c1, c2;
-
- while (1) {
- if (*str1 == 0)
- if (*str2 == 0)
- return 0;
- else
- return -1;
- if (*str2 == 0)
- return 1;
- c1 = (char) cm_foldUpper[(unsigned char)(*str1++)];
- c2 = (char) cm_foldUpper[(unsigned char)(*str2++)];
- if (c1 < c2)
- return -1;
- if (c1 > c2)
- return 1;
- }
+ char c1, c2;
+
+ while (1) {
+ if (*str1 == 0)
+ if (*str2 == 0)
+ return 0;
+ else
+ return -1;
+ if (*str2 == 0)
+ return 1;
+ c1 = (char) cm_foldUpper[(unsigned char)(*str1++)];
+ c2 = (char) cm_foldUpper[(unsigned char)(*str2++)];
+ if (c1 < c2)
+ return -1;
+ if (c1 > c2)
+ return 1;
+ }
}
/* characters that are legal in an 8.3 name */
/* return true iff component is a valid 8.3 name */
int cm_Is8Dot3(char *namep)
{
- int sawDot = 0;
- int sawUpper = 0, sawLower = 0;
- unsigned char tc;
- int charCount = 0;
+ int sawDot = 0;
+ unsigned char tc;
+ int charCount = 0;
- /*
- * can't have a leading dot;
- * special case for . and ..
- */
- if (namep[0] == '.') {
- if (namep[1] == 0)
- return 1;
- if (namep[1] == '.' && namep[2] == 0)
- return 1;
- return 0;
- }
- while (tc = *namep++) {
- if (tc == '.') {
- /* saw another dot */
- if (sawDot) return 0; /* second dot */
- sawDot = 1;
- charCount = 0;
- continue;
- }
- if (cm_LegalChars[tc] == 0)
- return 0;
- if (tc >= 'A' && tc <= 'Z')
- sawUpper = 1;
- else if (tc >= 'a' && tc <= 'z')
- sawLower = 1;
- charCount++;
- if (!sawDot && charCount > 8)
- /* more than 8 chars in name */
- return 0;
- if (sawDot && charCount > 3)
- /* more than 3 chars in extension */
- return 0;
+ /*
+ * can't have a leading dot;
+ * special case for . and ..
+ */
+ if (namep[0] == '.') {
+ if (namep[1] == 0)
+ return 1;
+ if (namep[1] == '.' && namep[2] == 0)
+ return 1;
+ return 0;
+ }
+ while (tc = *namep++) {
+ if (tc == '.') {
+ /* saw another dot */
+ if (sawDot) return 0; /* second dot */
+ sawDot = 1;
+ charCount = 0;
+ continue;
}
-/*
- * Used to check that all characters were the same case.
- * This doesn't help 16-bit apps, and meanwhile it causes the
- * MS-DOS Command Prompt to misbehave; see Sybase defect 10709.
- *
- if (sawUpper && sawLower)
- return 0;
- */
- return 1;
+ if (cm_LegalChars[tc] == 0)
+ return 0;
+ charCount++;
+ if (!sawDot && charCount > 8)
+ /* more than 8 chars in name */
+ return 0;
+ if (sawDot && charCount > 3)
+ /* more than 3 chars in extension */
+ return 0;
+ }
+ return 1;
}
/*
* Number unparsing map for generating 8.3 names;
- * Taken from DFS.
+ * The version taken from DFS was on drugs.
+ * You can't include '&' and '@' in a file name.
*/
-char cm_8Dot3Mapping[41] =
+char cm_8Dot3Mapping[42] =
{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
- 'B', 'C', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S',
- 'T', 'V', 'W', 'X', 'Y', 'Z', '_', '-', '$', '#', '@', '%', '!', '&', 'E', 'O'
+ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K',
+ 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U',
+ 'V', 'W', 'X', 'Y', 'Z', '_', '-', '$', '#', '!', '+', '='
};
int cm_8Dot3MapSize = sizeof(cm_8Dot3Mapping);
-void cm_Gen8Dot3Name(cm_dirEntry_t *dep, char *shortName, char **shortNameEndp)
+void cm_Gen8Dot3NameInt(const char * longname, cm_dirFid_t * pfid,
+ char *shortName, char **shortNameEndp)
{
- char number[12];
- int i, nsize = 0;
- int vnode = ntohl(dep->fid.vnode);
- char *lastDot;
- int validExtension = 0;
- char tc, *temp, *name;
-
- /* Unparse the file's vnode number to get a "uniquifier" */
- do {
- number[nsize] = cm_8Dot3Mapping[vnode % cm_8Dot3MapSize];
- nsize++;
- vnode /= cm_8Dot3MapSize;
- } while (vnode);
-
- /*
- * Look for valid extension. There has to be a dot, and
- * at least one of the characters following has to be legal.
- */
- lastDot = strrchr(dep->name, '.');
- if (lastDot) {
- temp = lastDot; temp++;
- while (tc = *temp++)
- if (cm_LegalChars[tc])
- break;
- if (tc)
- validExtension = 1;
- }
-
- /* Copy name characters */
- name = dep->name;
- for (i = 0, name = dep->name;
- i < (7 - nsize) && name != lastDot; ) {
- tc = *name++;
-
- if (tc == 0)
- break;
- if (!cm_LegalChars[tc])
- continue;
- i++;
- *shortName++ = toupper(tc);
- }
+ char number[12];
+ int i, nsize = 0;
+ int vnode = ntohl(pfid->vnode);
+ char *lastDot;
+ int validExtension = 0;
+ char tc, *temp;
+ const char *name;
+
+ /* Unparse the file's vnode number to get a "uniquifier" */
+ do {
+ number[nsize] = cm_8Dot3Mapping[vnode % cm_8Dot3MapSize];
+ nsize++;
+ vnode /= cm_8Dot3MapSize;
+ } while (vnode);
+
+ /*
+ * Look for valid extension. There has to be a dot, and
+ * at least one of the characters following has to be legal.
+ */
+ lastDot = strrchr(longname, '.');
+ if (lastDot) {
+ temp = lastDot; temp++;
+ while (tc = *temp++)
+ if (cm_LegalChars[tc])
+ break;
+ if (tc)
+ validExtension = 1;
+ }
+
+ /* Copy name characters */
+ for (i = 0, name = longname;
+ i < (7 - nsize) && name != lastDot; ) {
+ tc = *name++;
+
+ if (tc == 0)
+ break;
+ if (!cm_LegalChars[tc])
+ continue;
+ i++;
+ *shortName++ = toupper(tc);
+ }
- /* tilde */
- *shortName++ = '~';
-
- /* Copy uniquifier characters */
- memcpy(shortName, number, nsize);
- shortName += nsize;
-
- if (validExtension) {
- /* Copy extension characters */
- *shortName++ = *lastDot++; /* copy dot */
- for (i = 0, tc = *lastDot++;
- i < 3 && tc;
- tc = *lastDot++) {
- if (cm_LegalChars[tc]) {
- i++;
- *shortName++ = toupper(tc);
- }
- }
- }
+ /* tilde */
+ *shortName++ = '~';
+
+ /* Copy uniquifier characters */
+ memcpy(shortName, number, nsize);
+ shortName += nsize;
+
+ if (validExtension) {
+ /* Copy extension characters */
+ *shortName++ = *lastDot++; /* copy dot */
+ for (i = 0, tc = *lastDot++;
+ i < 3 && tc;
+ tc = *lastDot++) {
+ if (cm_LegalChars[tc]) {
+ i++;
+ *shortName++ = toupper(tc);
+ }
+ }
+ }
- /* Trailing null */
- *shortName = 0;
+ /* Trailing null */
+ *shortName = 0;
- if (shortNameEndp)
- *shortNameEndp = shortName;
-}
+ if (shortNameEndp)
+ *shortNameEndp = shortName;
+}
/* return success if we can open this file in this mode */
long cm_CheckOpen(cm_scache_t *scp, int openMode, int trunc, cm_user_t *userp,
- cm_req_t *reqp)
+ cm_req_t *reqp)
{
- long rights;
- long code;
+ long rights;
+ long code;
- rights = 0;
- if (openMode != 1) rights |= PRSFS_READ;
- if (openMode == 1 || openMode == 2 || trunc) rights |= PRSFS_WRITE;
+ rights = 0;
+ if (openMode != 1)
+ rights |= PRSFS_READ;
+ if (openMode == 1 || openMode == 2 || trunc)
+ rights |= PRSFS_WRITE;
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainMutex(&scp->mx);
- code = cm_SyncOp(scp, NULL, userp, reqp, rights,
- CM_SCACHESYNC_GETSTATUS
- | CM_SCACHESYNC_NEEDCALLBACK);
- lock_ReleaseMutex(&scp->mx);
+ code = cm_SyncOp(scp, NULL, userp, reqp, rights,
+ CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_LOCK);
+
+ if (code == 0 &&
+ ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
+ scp->fileType == CM_SCACHETYPE_FILE) {
+
+ cm_key_t key;
+ unsigned int sLockType;
+ LARGE_INTEGER LOffset, LLength;
+
+ /* Check if there's some sort of lock on the file at the
+ moment. */
+
+ key = cm_GenerateKey(CM_SESSION_CMINT,0,0);
+
+ if (rights & PRSFS_WRITE)
+ sLockType = 0;
+ else
+ sLockType = LOCKING_ANDX_SHARED_LOCK;
+
+ LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
+ LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
+ LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
+ LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
+
+ code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
+
+ if (code == 0) {
+ cm_Unlock(scp, sLockType, LOffset, LLength, key, userp, reqp);
+ } else {
+ /* In this case, we allow the file open to go through even
+ though we can't enforce mandatory locking on the
+ file. */
+ if (code == CM_ERROR_NOACCESS &&
+ !(rights & PRSFS_WRITE))
+ code = 0;
+ else {
+ switch (code) {
+ case CM_ERROR_ALLOFFLINE:
+ case CM_ERROR_ALLDOWN:
+ case CM_ERROR_ALLBUSY:
+ case CM_ERROR_TIMEDOUT:
+ case CM_ERROR_RETRY:
+ case CM_ERROR_WOULDBLOCK:
+ break;
+ default:
+ code = CM_ERROR_SHARING_VIOLATION;
+ }
+ }
+ }
+
+ } else if (code != 0) {
+ goto _done;
+ }
+
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
+
+ _done:
+
+ lock_ReleaseMutex(&scp->mx);
- return code;
+ return code;
}
/* return success if we can open this file in this mode */
long cm_CheckNTOpen(cm_scache_t *scp, unsigned int desiredAccess,
- unsigned int createDisp, cm_user_t *userp, cm_req_t *reqp)
+ unsigned int createDisp, cm_user_t *userp, cm_req_t *reqp,
+ cm_lock_data_t **ldpp)
{
- long rights;
- long code;
+ long rights;
+ long code;
- /* Always allow delete; the RPC will tell us if it's OK */
- if (desiredAccess == DELETE)
- return 0;
+ osi_assert(ldpp != NULL);
+ *ldpp = NULL;
- rights = 0;
+ /* Always allow delete; the RPC will tell us if it's OK */
+ if (desiredAccess == DELETE)
+ return 0;
- if (desiredAccess & AFS_ACCESS_READ)
- rights |= PRSFS_READ;
+ rights = 0;
- if ((desiredAccess & AFS_ACCESS_WRITE)
- || createDisp == 4)
- rights |= PRSFS_WRITE;
-
- lock_ObtainMutex(&scp->mx);
+ if (desiredAccess & AFS_ACCESS_READ)
+ rights |= PRSFS_READ;
- code = cm_SyncOp(scp, NULL, userp, reqp, rights,
- CM_SCACHESYNC_GETSTATUS
- | CM_SCACHESYNC_NEEDCALLBACK);
- lock_ReleaseMutex(&scp->mx);
+ if ((desiredAccess & AFS_ACCESS_WRITE)
+ || createDisp == 4)
+ rights |= PRSFS_WRITE;
- /*
- * If the open will fail because the volume is readonly, then we will
- * return an access denied error instead. This is to help brain-dead
- * apps run correctly on replicated volumes.
- * See defect 10007 for more information.
- */
- if (code == CM_ERROR_READONLY)
- code = CM_ERROR_NOACCESS;
+ lock_ObtainMutex(&scp->mx);
+
+ code = cm_SyncOp(scp, NULL, userp, reqp, rights,
+ CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_LOCK);
+
+ /*
+ * If the open will fail because the volume is readonly, then we will
+ * return an access denied error instead. This is to help brain-dead
+ * apps run correctly on replicated volumes.
+ * See defect 10007 for more information.
+ */
+ if (code == CM_ERROR_READONLY)
+ code = CM_ERROR_NOACCESS;
+
+ if (code == 0 &&
+ ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
+ scp->fileType == CM_SCACHETYPE_FILE) {
+ cm_key_t key;
+ unsigned int sLockType;
+ LARGE_INTEGER LOffset, LLength;
+
+ /* Check if there's some sort of lock on the file at the
+ moment. */
- return code;
+ key = cm_GenerateKey(CM_SESSION_CMINT,0,0);
+ if (rights & PRSFS_WRITE)
+ sLockType = 0;
+ else
+ sLockType = LOCKING_ANDX_SHARED_LOCK;
+
+ /* single byte lock at offset 0x0100 0000 0000 0000 */
+ LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
+ LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
+ LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
+ LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
+
+ code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
+
+ if (code == 0) {
+ (*ldpp) = (cm_lock_data_t *)malloc(sizeof(cm_lock_data_t));
+ if (!*ldpp) {
+ code = ENOMEM;
+ goto _done;
+ }
+
+ (*ldpp)->key = key;
+ (*ldpp)->sLockType = sLockType;
+ (*ldpp)->LOffset.HighPart = LOffset.HighPart;
+ (*ldpp)->LOffset.LowPart = LOffset.LowPart;
+ (*ldpp)->LLength.HighPart = LLength.HighPart;
+ (*ldpp)->LLength.LowPart = LLength.LowPart;
+ } else {
+ /* In this case, we allow the file open to go through even
+ though we can't enforce mandatory locking on the
+ file. */
+ if (code == CM_ERROR_NOACCESS &&
+ !(rights & PRSFS_WRITE))
+ code = 0;
+ else {
+ switch (code) {
+ case CM_ERROR_ALLOFFLINE:
+ case CM_ERROR_ALLDOWN:
+ case CM_ERROR_ALLBUSY:
+ case CM_ERROR_TIMEDOUT:
+ case CM_ERROR_RETRY:
+ case CM_ERROR_WOULDBLOCK:
+ break;
+ default:
+ code = CM_ERROR_SHARING_VIOLATION;
+ }
+ }
+ }
+ } else if (code != 0) {
+ goto _done;
+ }
+
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
+
+ _done:
+ lock_ReleaseMutex(&scp->mx);
+
+ return code;
}
+extern long cm_CheckNTOpenDone(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp,
+ cm_lock_data_t ** ldpp)
+{
+ if (*ldpp) {
+ lock_ObtainMutex(&scp->mx);
+ cm_Unlock(scp, (*ldpp)->sLockType, (*ldpp)->LOffset, (*ldpp)->LLength,
+ (*ldpp)->key, userp, reqp);
+ lock_ReleaseMutex(&scp->mx);
+ free(*ldpp);
+ *ldpp = NULL;
+ }
+ return 0;
+}
/*
* When CAP_NT_SMBS has been negotiated, deletion (of files or directories) is
* done in three steps:
* (1) open for deletion (NT_CREATE_AND_X)
- * (2) set for deletion on close (NTWTRANSACTION2, SET_FILE_INFO)
+ * (2) set for deletion on close (NT_TRANSACTION2, SET_FILE_INFO)
* (3) close (CLOSE)
* We must not do the RPC until step 3. But if we are going to return an error
* code (e.g. directory not empty), we must return it by step 2, otherwise most
long cm_CheckNTDelete(cm_scache_t *dscp, cm_scache_t *scp, cm_user_t *userp,
cm_req_t *reqp)
{
- long code;
- osi_hyper_t thyper;
- cm_buf_t *bufferp;
- cm_dirEntry_t *dep;
- unsigned short *hashTable;
- unsigned int i, idx;
- int BeyondPage = 0, HaveDot = 0, HaveDotDot = 0;
-
- /* First check permissions */
- lock_ObtainMutex(&dscp->mx);
- code = cm_SyncOp(dscp, NULL, userp, reqp, PRSFS_DELETE,
- CM_SCACHESYNC_GETSTATUS
- | CM_SCACHESYNC_NEEDCALLBACK);
- lock_ReleaseMutex(&dscp->mx);
- if (code)
- return code;
-
- /* If deleting directory, must be empty */
-
- if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
- return code;
-
- thyper.HighPart = 0; thyper.LowPart = 0;
- lock_ObtainRead(&scp->bufCreateLock);
- code = buf_Get(scp, &thyper, &bufferp);
- lock_ReleaseRead(&scp->bufCreateLock);
- if (code)
- return code;
-
- lock_ObtainMutex(&bufferp->mx);
- lock_ObtainMutex(&scp->mx);
- while (1) {
- code = cm_SyncOp(scp, bufferp, userp, reqp, 0,
- CM_SCACHESYNC_NEEDCALLBACK
- | CM_SCACHESYNC_READ
- | CM_SCACHESYNC_BUFLOCKED);
- if (code)
- break;
-
- if (cm_HaveBuffer(scp, bufferp, 1))
- break;
-
- /* otherwise, load the buffer and try again */
- lock_ReleaseMutex(&bufferp->mx);
- code = cm_GetBuffer(scp, bufferp, NULL, userp, reqp);
- lock_ReleaseMutex(&scp->mx);
- lock_ObtainMutex(&bufferp->mx);
- lock_ObtainMutex(&scp->mx);
- if (code)
- break;
- }
+ long code;
+ osi_hyper_t thyper;
+ cm_buf_t *bufferp;
+ cm_dirEntry_t *dep;
+ unsigned short *hashTable;
+ unsigned int i, idx;
+ int BeyondPage = 0, HaveDot = 0, HaveDotDot = 0;
- /* We try to determine emptiness without looking beyond the first page,
- * and without assuming "." and ".." are present and are on the first
- * page (though these assumptions might, after all, be reasonable).
- */
- hashTable = (unsigned short *)(bufferp->datap + (32 * 5));
- for (i=0; i<128; i++) {
- idx = ntohs(hashTable[i]);
- while (idx) {
- if (idx >= 64) {
- BeyondPage = 1;
- break;
- }
- dep = (cm_dirEntry_t *)(bufferp->datap + (32 * idx));
- if (strcmp(dep->name, ".") == 0)
- HaveDot = 1;
- else if (strcmp(dep->name, "..") == 0)
- HaveDotDot = 1;
- else {
- code = CM_ERROR_NOTEMPTY;
- goto done;
- }
- idx = ntohs(dep->next);
- }
- }
- if (BeyondPage && HaveDot && HaveDotDot)
- code = CM_ERROR_NOTEMPTY;
- else
- code = 0;
-done:
- lock_ReleaseMutex(&bufferp->mx);
- buf_Release(bufferp);
- lock_ReleaseMutex(&scp->mx);
- return code;
-}
+ /* First check permissions */
+ lock_ObtainMutex(&dscp->mx);
+ code = cm_SyncOp(dscp, NULL, userp, reqp, PRSFS_DELETE,
+ CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
+ cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
+ lock_ReleaseMutex(&dscp->mx);
+ if (code)
+ return code;
+
+ /* If deleting directory, must be empty */
+
+ if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
+ return code;
+
+ thyper.HighPart = 0; thyper.LowPart = 0;
+ lock_ObtainRead(&scp->bufCreateLock);
+ code = buf_Get(scp, &thyper, &bufferp);
+ lock_ReleaseRead(&scp->bufCreateLock);
+ if (code)
+ return code;
+
+ lock_ObtainMutex(&bufferp->mx);
+ lock_ObtainMutex(&scp->mx);
+ while (1) {
+ code = cm_SyncOp(scp, bufferp, userp, reqp, 0,
+ CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_READ
+ | CM_SCACHESYNC_BUFLOCKED);
+ if (code)
+ break;
+
+ if (cm_HaveBuffer(scp, bufferp, 1))
+ break;
+
+ /* otherwise, load the buffer and try again */
+ lock_ReleaseMutex(&bufferp->mx);
+ code = cm_GetBuffer(scp, bufferp, NULL, userp, reqp);
+ lock_ReleaseMutex(&scp->mx);
+ lock_ObtainMutex(&bufferp->mx);
+ lock_ObtainMutex(&scp->mx);
+ cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
+ if (code)
+ break;
+ }
+
+ /* We try to determine emptiness without looking beyond the first page,
+ * and without assuming "." and ".." are present and are on the first
+ * page (though these assumptions might, after all, be reasonable).
+ */
+ hashTable = (unsigned short *)(bufferp->datap + (32 * 5));
+ for (i=0; i<128; i++) {
+ idx = ntohs(hashTable[i]);
+ while (idx) {
+ if (idx >= 64) {
+ BeyondPage = 1;
+ break;
+ }
+ dep = (cm_dirEntry_t *)(bufferp->datap + (32 * idx));
+ if (strcmp(dep->name, ".") == 0)
+ HaveDot = 1;
+ else if (strcmp(dep->name, "..") == 0)
+ HaveDotDot = 1;
+ else {
+ code = CM_ERROR_NOTEMPTY;
+ goto done;
+ }
+ idx = ntohs(dep->next);
+ }
+ }
+ if (BeyondPage && HaveDot && HaveDotDot)
+ code = CM_ERROR_NOTEMPTY;
+ else
+ code = 0;
+ done:
+ lock_ReleaseMutex(&bufferp->mx);
+ buf_Release(bufferp);
+ lock_ReleaseMutex(&scp->mx);
+ return code;
+}
/*
* Iterate through all entries in a directory.
* When the function funcp is called, the buffer is locked but the
* directory vnode is not.
+ *
+ * If the retscp parameter is not NULL, the parmp must be a
+ * cm_lookupSearch_t object.
*/
long cm_ApplyDir(cm_scache_t *scp, cm_DirFuncp_t funcp, void *parmp,
- osi_hyper_t *startOffsetp, cm_user_t *userp, cm_req_t *reqp,
- cm_scache_t **retscp)
+ osi_hyper_t *startOffsetp, cm_user_t *userp, cm_req_t *reqp,
+ cm_scache_t **retscp)
{
char *tp;
long code;
osi_hyper_t thyper;
long entryInDir;
long entryInBuffer;
- cm_pageHeader_t *pageHeaderp;
+ cm_pageHeader_t *pageHeaderp;
int slotInPage;
long nextEntryCookie;
int numDirChunks; /* # of 32 byte dir chunks in this entry */
/* get the directory size */
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainMutex(&scp->mx);
code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_LOOKUP,
- CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
- if (code) {
- lock_ReleaseMutex(&scp->mx);
+ CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
+ if (code) {
+ lock_ReleaseMutex(&scp->mx);
return code;
}
if (scp->fileType != CM_SCACHETYPE_DIRECTORY) {
- lock_ReleaseMutex(&scp->mx);
- return CM_ERROR_NOTDIR;
- }
+ lock_ReleaseMutex(&scp->mx);
+ return CM_ERROR_NOTDIR;
+ }
- if (retscp) /* if this is a lookup call */
- {
- cm_lookupSearch_t* sp = parmp;
- int casefold = sp->caseFold;
+ if (retscp) /* if this is a lookup call */
+ {
+ cm_lookupSearch_t* sp = parmp;
+#ifdef AFS_FREELANCE_CLIENT
+ /* Freelance entries never end up in the DNLC because they
+ * do not have an associated cm_server_t
+ */
+ if ( !(cm_freelanceEnabled &&
+ sp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
+ sp->fid.volume==AFS_FAKE_ROOT_VOL_ID ) )
+#endif /* AFS_FREELANCE_CLIENT */
+ {
+ int casefold = sp->caseFold;
sp->caseFold = 0; /* we have a strong preference for exact matches */
- if ( *retscp = cm_dnlcLookup(scp, sp)) /* dnlc hit */
- {
+ if ( *retscp = cm_dnlcLookup(scp, sp)) /* dnlc hit */
+ {
sp->caseFold = casefold;
- lock_ReleaseMutex(&scp->mx);
- return 0;
- }
-
+ lock_ReleaseMutex(&scp->mx);
+ return 0;
+ }
sp->caseFold = casefold;
- }
+ }
+ }
- /*
- * XXX We only get the length once. It might change when we drop the
- * lock.
- */
+ /*
+ * XXX We only get the length once. It might change when we drop the
+ * lock.
+ */
dirLength = scp->length;
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseMutex(&scp->mx);
bufferp = NULL;
bufferOffset.LowPart = bufferOffset.HighPart = 0;
- if (startOffsetp)
+ if (startOffsetp)
curOffset = *startOffsetp;
- else {
+ else {
curOffset.HighPart = 0;
curOffset.LowPart = 0;
- }
+ }
while (1) {
- /* make sure that curOffset.LowPart doesn't point to the first
+ /* make sure that curOffset.LowPart doesn't point to the first
* 32 bytes in the 2nd through last dir page, and that it
- * doesn't point at the first 13 32-byte chunks in the first
- * dir page, since those are dir and page headers, and don't
- * contain useful information.
+ * doesn't point at the first 13 32-byte chunks in the first
+ * dir page, since those are dir and page headers, and don't
+ * contain useful information.
*/
- temp = curOffset.LowPart & (2048-1);
+ temp = curOffset.LowPart & (2048-1);
if (curOffset.HighPart == 0 && curOffset.LowPart < 2048) {
/* we're in the first page */
if (temp < 13*32) temp = 13*32;
- }
- else {
- /* we're in a later dir page */
- if (temp < 32) temp = 32;
}
+ else {
+ /* we're in a later dir page */
+ if (temp < 32) temp = 32;
+ }
/* make sure the low order 5 bits are zero */
temp &= ~(32-1);
/* check if we've passed the dir's EOF */
if (LargeIntegerGreaterThanOrEqualTo(curOffset, dirLength))
- break;
+ break;
/* see if we can use the bufferp we have now; compute in which
* page the current offset would be, and check whether that's
- * the offset of the buffer we have. If not, get the buffer.
- */
+ * the offset of the buffer we have. If not, get the buffer.
+ */
thyper.HighPart = curOffset.HighPart;
- thyper.LowPart = curOffset.LowPart & ~(buf_bufferSize-1);
+ thyper.LowPart = curOffset.LowPart & ~(cm_data.buf_blockSize-1);
if (!bufferp || !LargeIntegerEqualTo(thyper, bufferOffset)) {
- /* wrong buffer */
+ /* wrong buffer */
if (bufferp) {
- lock_ReleaseMutex(&bufferp->mx);
+ lock_ReleaseMutex(&bufferp->mx);
buf_Release(bufferp);
bufferp = NULL;
- }
+ }
- lock_ObtainRead(&scp->bufCreateLock);
+ lock_ObtainRead(&scp->bufCreateLock);
code = buf_Get(scp, &thyper, &bufferp);
- lock_ReleaseRead(&scp->bufCreateLock);
+ lock_ReleaseRead(&scp->bufCreateLock);
+ if (code) {
+ /* if buf_Get() fails we do not have a buffer object to lock */
+ bufferp = NULL;
+ break;
+ }
+
+#ifdef AFSIFS
+ /* for the IFS version, we bulkstat the dirents because this
+ routine is used in place of smb_ReceiveCoreSearchDir. our
+ other option is to modify smb_ReceiveCoreSearchDir itself,
+ but this seems to be the proper use for cm_ApplyDir. */
+ lock_ObtainMutex(&scp->mx);
+ if ((scp->flags & CM_SCACHEFLAG_BULKSTATTING) == 0
+ && (scp->bulkStatProgress.QuadPart <= thyper.QuadPart))
+ {
+ scp->flags |= CM_SCACHEFLAG_BULKSTATTING;
+ code = cm_TryBulkStat(scp, &thyper, userp, reqp);
+ scp->flags &= ~CM_SCACHEFLAG_BULKSTATTING;
+ scp->bulkStatProgress = thyper;
+ }
+ lock_ReleaseMutex(&scp->mx);
+#endif
- lock_ObtainMutex(&bufferp->mx);
- if (code) break;
+ lock_ObtainMutex(&bufferp->mx);
bufferOffset = thyper;
/* now get the data in the cache */
while (1) {
lock_ObtainMutex(&scp->mx);
- code = cm_SyncOp(scp, bufferp, userp, reqp,
- PRSFS_LOOKUP,
- CM_SCACHESYNC_NEEDCALLBACK
- | CM_SCACHESYNC_READ
- | CM_SCACHESYNC_BUFLOCKED);
- if (code) {
- lock_ReleaseMutex(&scp->mx);
- break;
- }
+ code = cm_SyncOp(scp, bufferp, userp, reqp,
+ PRSFS_LOOKUP,
+ CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_READ
+ | CM_SCACHESYNC_BUFLOCKED);
+ if (code) {
+ lock_ReleaseMutex(&scp->mx);
+ break;
+ }
+ cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
if (cm_HaveBuffer(scp, bufferp, 1)) {
- lock_ReleaseMutex(&scp->mx);
- break;
- }
-
+ lock_ReleaseMutex(&scp->mx);
+ break;
+ }
+
/* otherwise, load the buffer and try again */
lock_ReleaseMutex(&bufferp->mx);
code = cm_GetBuffer(scp, bufferp, NULL, userp,
reqp);
lock_ReleaseMutex(&scp->mx);
lock_ObtainMutex(&bufferp->mx);
- if (code) break;
+ if (code)
+ break;
}
if (code) {
- lock_ReleaseMutex(&bufferp->mx);
- buf_Release(bufferp);
+ lock_ReleaseMutex(&bufferp->mx);
+ buf_Release(bufferp);
bufferp = NULL;
break;
- }
+ }
} /* if (wrong buffer) ... */
-
+
/* now we have the buffer containing the entry we're interested
* in; copy it out if it represents a non-deleted entry.
*/
- entryInDir = curOffset.LowPart & (2048-1);
- entryInBuffer = curOffset.LowPart & (buf_bufferSize - 1);
+ entryInDir = curOffset.LowPart & (2048-1);
+ entryInBuffer = curOffset.LowPart & (cm_data.buf_blockSize - 1);
- /* page header will help tell us which entries are free. Page
- * header can change more often than once per buffer, since
- * AFS 3 dir page size may be less than (but not more than) a
- * buffer package buffer.
+ /* page header will help tell us which entries are free. Page
+ * header can change more often than once per buffer, since
+ * AFS 3 dir page size may be less than (but not more than) a
+ * buffer package buffer.
*/
- /* only look intra-buffer */
- temp = curOffset.LowPart & (buf_bufferSize - 1);
+ /* only look intra-buffer */
+ temp = curOffset.LowPart & (cm_data.buf_blockSize - 1);
temp &= ~(2048 - 1); /* turn off intra-page bits */
- pageHeaderp = (cm_pageHeader_t *) (bufferp->datap + temp);
+ pageHeaderp = (cm_pageHeader_t *) (bufferp->datap + temp);
- /* now determine which entry we're looking at in the page. If
- * it is free (there's a free bitmap at the start of the dir),
- * we should skip these 32 bytes.
+ /* now determine which entry we're looking at in the page. If
+ * it is free (there's a free bitmap at the start of the dir),
+ * we should skip these 32 bytes.
*/
slotInPage = (entryInDir & 0x7e0) >> 5;
if (!(pageHeaderp->freeBitmap[slotInPage>>3]
& (1 << (slotInPage & 0x7)))) {
- /* this entry is free */
+ /* this entry is free */
numDirChunks = 1; /* only skip this guy */
goto nextEntry;
}
- tp = bufferp->datap + entryInBuffer;
+ tp = bufferp->datap + entryInBuffer;
dep = (cm_dirEntry_t *) tp; /* now points to AFS3 dir entry */
/* while we're here, compute the next entry's location, too,
- * since we'll need it when writing out the cookie into the
- * dir listing stream.
+ * since we'll need it when writing out the cookie into the
+ * dir listing stream.
*/
- numDirChunks = cm_NameEntries(dep->name, NULL);
+ numDirChunks = cm_NameEntries(dep->name, NULL);
/* compute the offset of the cookie representing the next entry */
nextEntryCookie = curOffset.LowPart
- + (CM_DIR_CHUNKSIZE * numDirChunks);
+ + (CM_DIR_CHUNKSIZE * numDirChunks);
if (dep->fid.vnode != 0) {
- /* this is one of the entries to use: it is not deleted */
- code = (*funcp)(scp, dep, parmp, &curOffset);
- if (code) break;
- } /* if we're including this name */
+ /* this is one of the entries to use: it is not deleted */
+ code = (*funcp)(scp, dep, parmp, &curOffset);
+ if (code)
+ break;
+ } /* if we're including this name */
nextEntry:
/* and adjust curOffset to be where the new cookie is */
- thyper.HighPart = 0;
+ thyper.HighPart = 0;
thyper.LowPart = CM_DIR_CHUNKSIZE * numDirChunks;
curOffset = LargeIntegerAdd(thyper, curOffset);
} /* while copying data for dir listing */
- /* release the mutex */
+ /* release the mutex */
if (bufferp) {
- lock_ReleaseMutex(&bufferp->mx);
+ lock_ReleaseMutex(&bufferp->mx);
buf_Release(bufferp);
- }
+ }
return code;
}
int cm_NoneUpper(char *s)
{
- char c;
- while (c = *s++)
- if (c >= 'A' && c <= 'Z')
- return 0;
- return 1;
+ char c;
+ while (c = *s++)
+ if (c >= 'A' && c <= 'Z')
+ return 0;
+ return 1;
}
int cm_NoneLower(char *s)
{
- char c;
- while (c = *s++)
- if (c >= 'a' && c <= 'z')
- return 0;
- return 1;
+ char c;
+ while (c = *s++)
+ if (c >= 'a' && c <= 'z')
+ return 0;
+ return 1;
}
long cm_LookupSearchProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
- osi_hyper_t *offp)
+ osi_hyper_t *offp)
{
- cm_lookupSearch_t *sp;
+ cm_lookupSearch_t *sp;
int match;
- char shortName[13];
- char *matchName;
-
+ char shortName[13];
+ char *matchName;
+
sp = (cm_lookupSearch_t *) rockp;
- matchName = dep->name;
- if (sp->caseFold)
+ matchName = dep->name;
+ if (sp->caseFold)
match = cm_stricmp(matchName, sp->searchNamep);
- else
- match = strcmp(matchName, sp->searchNamep);
-
- if (match != 0
- && sp->hasTilde
- && !cm_Is8Dot3(dep->name)) {
- matchName = shortName;
- cm_Gen8Dot3Name(dep, shortName, NULL);
- if (sp->caseFold)
- match = cm_stricmp(matchName, sp->searchNamep);
- else
- match = strcmp(matchName, sp->searchNamep);
- }
+ else
+ match = strcmp(matchName, sp->searchNamep);
+
+ if (match != 0
+ && sp->hasTilde
+ && !cm_Is8Dot3(dep->name)) {
+ matchName = shortName;
+ cm_Gen8Dot3Name(dep, shortName, NULL);
+ if (sp->caseFold)
+ match = cm_stricmp(matchName, sp->searchNamep);
+ else
+ match = strcmp(matchName, sp->searchNamep);
+ }
- if (match != 0)
- return 0;
+ if (match != 0)
+ return 0;
- sp->found = 1;
- if(!sp->caseFold) sp->ExactFound = 1;
+ sp->found = 1;
+ if (!sp->caseFold)
+ sp->ExactFound = 1;
- if (!sp->caseFold || matchName == shortName) {
- sp->fid.vnode = ntohl(dep->fid.vnode);
- sp->fid.unique = ntohl(dep->fid.unique);
+ if (!sp->caseFold || matchName == shortName) {
+ sp->fid.vnode = ntohl(dep->fid.vnode);
+ sp->fid.unique = ntohl(dep->fid.unique);
return CM_ERROR_STOPNOW;
}
- /*
- * If we get here, we are doing a case-insensitive search, and we
- * have found a match. Now we determine what kind of match it is:
- * exact, lower-case, upper-case, or none of the above. This is done
- * in order to choose among matches, if there are more than one.
- */
+ /*
+ * If we get here, we are doing a case-insensitive search, and we
+ * have found a match. Now we determine what kind of match it is:
+ * exact, lower-case, upper-case, or none of the above. This is done
+ * in order to choose among matches, if there are more than one.
+ */
- /* Exact matches are the best. */
- match = strcmp(matchName, sp->searchNamep);
- if (match == 0) {
+ /* Exact matches are the best. */
+ match = strcmp(matchName, sp->searchNamep);
+ if (match == 0) {
sp->ExactFound = 1;
- sp->fid.vnode = ntohl(dep->fid.vnode);
- sp->fid.unique = ntohl(dep->fid.unique);
+ sp->fid.vnode = ntohl(dep->fid.vnode);
+ sp->fid.unique = ntohl(dep->fid.unique);
return CM_ERROR_STOPNOW;
}
- /* Lower-case matches are next. */
- if (sp->LCfound)
- return 0;
- if (cm_NoneUpper(matchName)) {
- sp->LCfound = 1;
- goto inexact;
- }
+ /* Lower-case matches are next. */
+ if (sp->LCfound)
+ return 0;
+ if (cm_NoneUpper(matchName)) {
+ sp->LCfound = 1;
+ goto inexact;
+ }
- /* Upper-case matches are next. */
- if (sp->UCfound)
- return 0;
- if (cm_NoneLower(matchName)) {
- sp->UCfound = 1;
- goto inexact;
- }
+ /* Upper-case matches are next. */
+ if (sp->UCfound)
+ return 0;
+ if (cm_NoneLower(matchName)) {
+ sp->UCfound = 1;
+ goto inexact;
+ }
- /* General matches are last. */
- if (sp->NCfound)
- return 0;
- sp->NCfound = 1;
+ /* General matches are last. */
+ if (sp->NCfound)
+ return 0;
+ sp->NCfound = 1;
-inexact:
- sp->fid.vnode = ntohl(dep->fid.vnode);
- sp->fid.unique = ntohl(dep->fid.unique);
- return 0;
-}
+ inexact:
+ sp->fid.vnode = ntohl(dep->fid.vnode);
+ sp->fid.unique = ntohl(dep->fid.unique);
+ return 0;
+}
/* read the contents of a mount point into the appropriate string.
* called with locked scp, and returns with locked scp.
*/
long cm_ReadMountPoint(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
{
- long code;
- cm_buf_t *bufp;
- osi_hyper_t thyper;
- int tlen;
+ long code;
+ cm_buf_t *bufp;
+ osi_hyper_t thyper;
+ int tlen;
- if (scp->mountPointStringp) return 0;
+ if (scp->mountPointStringp[0])
+ return 0;
- /* otherwise, we have to read it in */
- lock_ReleaseMutex(&scp->mx);
+ /* otherwise, we have to read it in */
+ lock_ReleaseMutex(&scp->mx);
- lock_ObtainRead(&scp->bufCreateLock);
- thyper.LowPart = thyper.HighPart = 0;
- code = buf_Get(scp, &thyper, &bufp);
- lock_ReleaseRead(&scp->bufCreateLock);
+ lock_ObtainRead(&scp->bufCreateLock);
+ thyper.LowPart = thyper.HighPart = 0;
+ code = buf_Get(scp, &thyper, &bufp);
+ lock_ReleaseRead(&scp->bufCreateLock);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainMutex(&scp->mx);
+ if (code) {
+ return code;
+ }
+ while (1) {
+ code = cm_SyncOp(scp, bufp, userp, reqp, 0,
+ CM_SCACHESYNC_READ | CM_SCACHESYNC_NEEDCALLBACK);
if (code) {
- return code;
+ goto done;
}
- while (1) {
- code = cm_SyncOp(scp, bufp, userp, reqp, 0,
- CM_SCACHESYNC_READ | CM_SCACHESYNC_NEEDCALLBACK);
- if (code) {
- goto done;
- }
-
- if (cm_HaveBuffer(scp, bufp, 0)) break;
-
- /* otherwise load buffer */
- code = cm_GetBuffer(scp, bufp, NULL, userp, reqp);
- if (code) {
- goto done;
- }
- }
- /* locked, has callback, has valid data in buffer */
- if ((tlen = scp->length.LowPart) > 1000) return CM_ERROR_TOOBIG;
- if (tlen <= 0) {
- code = CM_ERROR_INVAL;
- goto done;
- }
-
- /* someone else did the work while we were out */
- if (scp->mountPointStringp) {
- code = 0;
- goto done;
+ cm_SyncOpDone(scp, bufp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
+
+
+ if (cm_HaveBuffer(scp, bufp, 0))
+ break;
+
+ /* otherwise load buffer */
+ code = cm_GetBuffer(scp, bufp, NULL, userp, reqp);
+ if (code) {
+ goto done;
}
-
- /* otherwise, copy out the link */
- scp->mountPointStringp = malloc(tlen);
- memcpy(scp->mountPointStringp, bufp->datap, tlen);
-
- /* now make it null-terminated. Note that the original contents of a
- * link that is a mount point is "#volname." where "." is there just to
- * be turned into a null. That is, we can trash the last char of the
- * link without damaging the vol name. This is a stupid convention,
- * but that's the protocol.
- */
- scp->mountPointStringp[tlen-1] = 0;
+ }
+ /* locked, has callback, has valid data in buffer */
+ if ((tlen = scp->length.LowPart) > 1000)
+ return CM_ERROR_TOOBIG;
+ if (tlen <= 0) {
+ code = CM_ERROR_INVAL;
+ goto done;
+ }
+
+ /* someone else did the work while we were out */
+ if (scp->mountPointStringp[0]) {
code = 0;
+ goto done;
+ }
-done:
- if (bufp) buf_Release(bufp);
- return code;
+ /* otherwise, copy out the link */
+ memcpy(scp->mountPointStringp, bufp->datap, tlen);
+
+ /* now make it null-terminated. Note that the original contents of a
+ * link that is a mount point is "#volname." where "." is there just to
+ * be turned into a null. That is, we can trash the last char of the
+ * link without damaging the vol name. This is a stupid convention,
+ * but that's the protocol.
+ */
+ scp->mountPointStringp[tlen-1] = 0;
+ code = 0;
+
+ done:
+ if (bufp)
+ buf_Release(bufp);
+ return code;
}
/* called with a locked scp and chases the mount point, yielding outScpp.
* scp remains locked, just for simplicity of describing the interface.
*/
long cm_FollowMountPoint(cm_scache_t *scp, cm_scache_t *dscp, cm_user_t *userp,
- cm_req_t *reqp, cm_scache_t **outScpp)
+ cm_req_t *reqp, cm_scache_t **outScpp)
{
- char *cellNamep;
- char *volNamep;
- int tlen;
- long code;
- char *cp;
- char *mpNamep;
- cm_volume_t *volp;
- cm_cell_t *cellp;
- char mtType;
- cm_fid_t tfid;
- size_t vnLength;
- int type;
-
- if (scp->mountRootFidp && scp->mountRootGen >= cm_mountRootGen) {
- tfid = *scp->mountRootFidp;
- lock_ReleaseMutex(&scp->mx);
- code = cm_GetSCache(&tfid, outScpp, userp, reqp);
- lock_ObtainMutex(&scp->mx);
- return code;
- }
-
- /* parse the volume name */
- mpNamep = scp->mountPointStringp;
- osi_assert(mpNamep);
- tlen = strlen(scp->mountPointStringp);
- mtType = *scp->mountPointStringp;
- cellNamep = malloc(tlen);
- volNamep = malloc(tlen);
-
- cp = strrchr(mpNamep, ':');
- if (cp) {
- /* cellular mount point */
- memset(cellNamep, 0, tlen);
- strncpy(cellNamep, mpNamep+1, cp - mpNamep - 1);
- strcpy(volNamep, cp+1);
- /* now look up the cell */
- cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE);
- }
- else {
- /* normal mt pt */
- strcpy(volNamep, mpNamep+1);
-
- cellp = cm_FindCellByID(scp->fid.cell);
- }
-
- if (!cellp) {
- code = CM_ERROR_NOSUCHCELL;
- goto done;
- }
-
- vnLength = strlen(volNamep);
- if (vnLength >= 8 && strcmp(volNamep + vnLength - 7, ".backup") == 0)
- type = BACKVOL;
- else if (vnLength >= 10
- && strcmp(volNamep + vnLength - 9, ".readonly") == 0)
- type = ROVOL;
- else
- type = RWVOL;
-
- /* check for backups within backups */
- if (type == BACKVOL
- && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
- == CM_SCACHEFLAG_RO) {
- code = CM_ERROR_NOSUCHVOLUME;
- goto done;
- }
-
- /* now we need to get the volume */
+ char *cellNamep;
+ char *volNamep;
+ int tlen;
+ long code;
+ char *cp;
+ char *mpNamep;
+ cm_volume_t *volp;
+ cm_cell_t *cellp;
+ char mtType;
+ cm_fid_t tfid;
+ size_t vnLength;
+ int type;
+
+ if (scp->mountRootFid.cell != 0 && scp->mountRootGen >= cm_data.mountRootGen) {
+ tfid = scp->mountRootFid;
lock_ReleaseMutex(&scp->mx);
- code = cm_GetVolumeByName(cellp, volNamep, userp, reqp, 0, &volp);
+ code = cm_GetSCache(&tfid, outScpp, userp, reqp);
lock_ObtainMutex(&scp->mx);
-
- if (code == 0) {
- /* save the parent of the volume root for this is the
- * place where the volume is mounted and we must remember
- * this in the volume structure rather than just in the
- * scache entry lest the scache entry gets recycled
- * (defect 11489)
- */
- lock_ObtainMutex(&volp->mx);
- if(volp->dotdotFidp == (cm_fid_t *) NULL)
- volp->dotdotFidp = (cm_fid_t *) malloc(sizeof(cm_fid_t));
- *(volp->dotdotFidp) = dscp->fid;
- lock_ReleaseMutex(&volp->mx);
-
- if (scp->mountRootFidp == 0) {
- scp->mountRootFidp = malloc(sizeof(cm_fid_t));
- }
- scp->mountRootFidp->cell = cellp->cellID;
- /* if the mt pt is in a read-only volume (not just a
- * backup), and if there is a read-only volume for the
- * target, and if this is a type '#' mount point, use
- * the read-only, otherwise use the one specified.
- */
- if (mtType == '#' && (scp->flags & CM_SCACHEFLAG_PURERO)
- && volp->roID != 0 && type == RWVOL)
- type = ROVOL;
- if (type == ROVOL)
- scp->mountRootFidp->volume = volp->roID;
- else if (type == BACKVOL)
- scp->mountRootFidp->volume = volp->bkID;
- else
- scp->mountRootFidp->volume = volp->rwID;
-
- /* the rest of the fid is a magic number */
- scp->mountRootFidp->vnode = 1;
- scp->mountRootFidp->unique = 1;
- scp->mountRootGen = cm_mountRootGen;
-
- tfid = *scp->mountRootFidp;
- lock_ReleaseMutex(&scp->mx);
- code = cm_GetSCache(&tfid, outScpp, userp, reqp);
- lock_ObtainMutex(&scp->mx);
- }
-
-done:
- free(cellNamep);
- free(volNamep);
return code;
-}
-
-int cm_ExpandSysName(char *inp, char *outp, long outSize)
-{
- char *tp;
- int prefixCount;
+ }
- tp = strrchr(inp, '@');
- if (tp == NULL) return 0; /* no @sys */
+ /* parse the volume name */
+ mpNamep = scp->mountPointStringp;
+ if (!mpNamep[0])
+ return CM_ERROR_NOSUCHPATH;
+ tlen = (int)strlen(scp->mountPointStringp);
+ mtType = *scp->mountPointStringp;
+ cellNamep = malloc(tlen);
+ volNamep = malloc(tlen);
+
+ cp = strrchr(mpNamep, ':');
+ if (cp) {
+ /* cellular mount point */
+ memset(cellNamep, 0, tlen);
+ strncpy(cellNamep, mpNamep+1, cp - mpNamep - 1);
+ strcpy(volNamep, cp+1);
+ /* now look up the cell */
+ cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE);
+ }
+ else {
+ /* normal mt pt */
+ strcpy(volNamep, mpNamep+1);
- if (strcmp(tp, "@sys") != 0) return 0; /* no @sys */
+ cellp = cm_FindCellByID(scp->fid.cell);
+ }
- /* caller just wants to know if this is a valid @sys type of name */
- if (outp == NULL) return 1;
+ if (!cellp) {
+ code = CM_ERROR_NOSUCHCELL;
+ goto done;
+ }
- /* otherwise generate the properly expanded @sys name */
- prefixCount = tp - inp;
+ vnLength = strlen(volNamep);
+ if (vnLength >= 8 && strcmp(volNamep + vnLength - 7, ".backup") == 0)
+ type = BACKVOL;
+ else if (vnLength >= 10
+ && strcmp(volNamep + vnLength - 9, ".readonly") == 0)
+ type = ROVOL;
+ else
+ type = RWVOL;
+
+ /* check for backups within backups */
+ if (type == BACKVOL
+ && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
+ == CM_SCACHEFLAG_RO) {
+ code = CM_ERROR_NOSUCHVOLUME;
+ goto done;
+ }
- strncpy(outp, inp, prefixCount); /* copy out "a." from "a.@sys" */
- outp[prefixCount] = 0; /* null terminate the "a." */
- strcat(outp, cm_sysName); /* append i386_nt40 */
- return 1;
-}
+ /* now we need to get the volume */
+ lock_ReleaseMutex(&scp->mx);
+ code = cm_GetVolumeByName(cellp, volNamep, userp, reqp, 0, &volp);
+ lock_ObtainMutex(&scp->mx);
+
+ if (code == 0) {
+ /* save the parent of the volume root for this is the
+ * place where the volume is mounted and we must remember
+ * this in the volume structure rather than just in the
+ * scache entry lest the scache entry gets recycled
+ * (defect 11489)
+ */
+ lock_ObtainMutex(&volp->mx);
+ volp->dotdotFid = dscp->fid;
+ lock_ReleaseMutex(&volp->mx);
+
+ scp->mountRootFid.cell = cellp->cellID;
+ /* if the mt pt is in a read-only volume (not just a
+ * backup), and if there is a read-only volume for the
+ * target, and if this is a type '#' mount point, use
+ * the read-only, otherwise use the one specified.
+ */
+ if (mtType == '#' && (scp->flags & CM_SCACHEFLAG_PURERO)
+ && volp->roID != 0 && type == RWVOL)
+ type = ROVOL;
+ if (type == ROVOL)
+ scp->mountRootFid.volume = volp->roID;
+ else if (type == BACKVOL)
+ scp->mountRootFid.volume = volp->bkID;
+ else
+ scp->mountRootFid.volume = volp->rwID;
+
+ /* the rest of the fid is a magic number */
+ scp->mountRootFid.vnode = 1;
+ scp->mountRootFid.unique = 1;
+ scp->mountRootGen = cm_data.mountRootGen;
+
+ tfid = scp->mountRootFid;
+ lock_ReleaseMutex(&scp->mx);
+ code = cm_GetSCache(&tfid, outScpp, userp, reqp);
+ lock_ObtainMutex(&scp->mx);
+ }
-long cm_Lookup(cm_scache_t *dscp, char *namep, long flags, cm_user_t *userp,
- cm_req_t *reqp, cm_scache_t **outpScpp)
+ done:
+ free(cellNamep);
+ free(volNamep);
+ return code;
+}
+
+long cm_LookupInternal(cm_scache_t *dscp, char *namep, long flags, cm_user_t *userp,
+ cm_req_t *reqp, cm_scache_t **outpScpp)
{
- long code;
- int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
+ long code;
+ int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
cm_scache_t *tscp = NULL;
cm_scache_t *mountedScp;
cm_lookupSearch_t rock;
- char tname[256];
- int getroot;
+ int getroot;
- if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
+ if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
&& strcmp(namep, "..") == 0) {
- if (dscp->dotdotFidp == (cm_fid_t *)NULL
- || dscp->dotdotFidp->volume == 0)
- return CM_ERROR_NOSUCHVOLUME;
- rock.fid = *dscp->dotdotFidp;
- goto haveFid;
- }
-
- if (cm_ExpandSysName(namep, tname, sizeof(tname))) {
- namep = tname;
+ if (dscp->dotdotFid.volume == 0)
+ return CM_ERROR_NOSUCHVOLUME;
+ rock.fid = dscp->dotdotFid;
+ goto haveFid;
+ } else if (strcmp(namep, ".") == 0) {
+ rock.fid = dscp->fid;
+ goto haveFid;
}
- memset(&rock, 0, sizeof(rock));
+
+ memset(&rock, 0, sizeof(rock));
rock.fid.cell = dscp->fid.cell;
rock.fid.volume = dscp->fid.volume;
rock.searchNamep = namep;
rock.caseFold = (flags & CM_FLAG_CASEFOLD);
- rock.hasTilde = ((strchr(namep, '~') != NULL) ? 1 : 0);
+ rock.hasTilde = ((strchr(namep, '~') != NULL) ? 1 : 0);
- /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
- code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
- (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
+ /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
+ code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
+ (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
- /* code == 0 means we fell off the end of the dir, while stopnow means
+ /* code == 0 means we fell off the end of the dir, while stopnow means
* that we stopped early, probably because we found the entry we're
- * looking for. Any other non-zero code is an error.
+ * looking for. Any other non-zero code is an error.
*/
- if (code && code != CM_ERROR_STOPNOW)
+ if (code && code != CM_ERROR_STOPNOW) {
+ /* if the cm_scache_t we are searching in is not a directory
+ * we must return path not found because the error
+ * is to describe the final component not an intermediary
+ */
+ if (code == CM_ERROR_NOTDIR) {
+ if (flags & CM_FLAG_CHECKPATH)
+ return CM_ERROR_NOSUCHPATH;
+ else
+ return CM_ERROR_NOSUCHFILE;
+ }
return code;
+ }
- getroot = (dscp==cm_rootSCachep) ;
+ getroot = (dscp==cm_data.rootSCachep) ;
if (!rock.found) {
if (!cm_freelanceEnabled || !getroot) {
if (flags & CM_FLAG_CHECKPATH)
return CM_ERROR_NOSUCHFILE;
}
else { /* nonexistent dir on freelance root, so add it */
- osi_Log1(afsd_logp,"cm_Lookup adding mount for non-existent directory: %s",
- osi_LogSaveString(afsd_logp,namep));
- code = cm_FreelanceAddMount(namep, namep, "root.cell.", 0, &rock.fid);
- if (code < 0) { /* add mount point failed, so give up */
+ char fullname[200] = ".";
+ int found = 0;
+
+ osi_Log1(afsd_logp,"cm_Lookup adding mount for non-existent directory: %s",
+ osi_LogSaveString(afsd_logp,namep));
+ if (namep[0] == '.') {
+ if (cm_GetCell_Gen(&namep[1], &fullname[1], CM_FLAG_CREATE)) {
+ found = 1;
+ if ( stricmp(&namep[1], &fullname[1]) )
+ code = cm_FreelanceAddSymlink(namep, fullname, &rock.fid);
+ else
+ code = cm_FreelanceAddMount(namep, &fullname[1], "root.cell.", 1, &rock.fid);
+ }
+ } else {
+ if (cm_GetCell_Gen(namep, fullname, CM_FLAG_CREATE)) {
+ found = 1;
+ if ( stricmp(namep, fullname) )
+ code = cm_FreelanceAddSymlink(namep, fullname, &rock.fid);
+ else
+ code = cm_FreelanceAddMount(namep, fullname, "root.cell.", 0, &rock.fid);
+ }
+ }
+ if (!found || code < 0) { /* add mount point failed, so give up */
if (flags & CM_FLAG_CHECKPATH)
return CM_ERROR_NOSUCHPATH;
else
}
tscp = NULL; /* to force call of cm_GetSCache */
}
- }
+ }
-haveFid:
- if ( !tscp ) /* we did not find it in the dnlc */
- {
- dnlcHit = 0;
+ haveFid:
+ if ( !tscp ) /* we did not find it in the dnlc */
+ {
+ dnlcHit = 0;
code = cm_GetSCache(&rock.fid, &tscp, userp, reqp);
if (code)
return code;
- }
+ }
/* tscp is now held */
- lock_ObtainMutex(&tscp->mx);
- code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
+ lock_ObtainMutex(&tscp->mx);
+ code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
if (code) {
- lock_ReleaseMutex(&tscp->mx);
- cm_ReleaseSCache(tscp);
+ lock_ReleaseMutex(&tscp->mx);
+ cm_ReleaseSCache(tscp);
return code;
- }
+ }
+ cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
/* tscp is now locked */
if (!(flags & CM_FLAG_NOMOUNTCHASE)
- && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
- /* mount points are funny: they have a volume name to mount
+ && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
+ /* mount points are funny: they have a volume name to mount
* the root of.
*/
- code = cm_ReadMountPoint(tscp, userp, reqp);
+ code = cm_ReadMountPoint(tscp, userp, reqp);
if (code == 0)
- code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
+ code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
&mountedScp);
- lock_ReleaseMutex(&tscp->mx);
- cm_ReleaseSCache(tscp);
- if (code) {
+ lock_ReleaseMutex(&tscp->mx);
+ cm_ReleaseSCache(tscp);
+ if (code) {
return code;
}
tscp = mountedScp;
}
- else {
- lock_ReleaseMutex(&tscp->mx);
- }
+ else {
+ lock_ReleaseMutex(&tscp->mx);
+ }
- /* copy back pointer */
+ /* copy back pointer */
*outpScpp = tscp;
- /* insert scache in dnlc */
- if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
- /* lock the directory entry to prevent racing callback revokes */
- lock_ObtainMutex(&dscp->mx);
- if ( dscp->cbServerp && dscp->cbExpires )
+ /* insert scache in dnlc */
+ if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
+ /* lock the directory entry to prevent racing callback revokes */
+ lock_ObtainMutex(&dscp->mx);
+ if ( dscp->cbServerp != NULL && dscp->cbExpires > 0 )
cm_dnlcEnter(dscp, namep, tscp);
- lock_ReleaseMutex(&dscp->mx);
- }
+ lock_ReleaseMutex(&dscp->mx);
+ }
- /* and return */
+ /* and return */
return 0;
}
-long cm_Unlink(cm_scache_t *dscp, char *namep, cm_user_t *userp, cm_req_t *reqp)
+int cm_ExpandSysName(char *inp, char *outp, long outSize, unsigned int index)
{
- long code;
- cm_conn_t *connp;
- AFSFid afsFid;
- int sflags;
- AFSFetchStatus newDirStatus;
- AFSVolSync volSync;
+ char *tp;
+ int prefixCount;
-#ifdef AFS_FREELANCE_CLIENT
- if (cm_freelanceEnabled && dscp == cm_rootSCachep) {
- /* deleting a mount point from the root dir. */
- code = cm_FreelanceRemoveMount(namep);
- return code;
- }
+ tp = strrchr(inp, '@');
+ if (tp == NULL)
+ return 0; /* no @sys */
+
+ if (strcmp(tp, "@sys") != 0)
+ return 0; /* no @sys */
+
+ /* caller just wants to know if this is a valid @sys type of name */
+ if (outp == NULL)
+ return 1;
+
+ if (index >= MAXNUMSYSNAMES)
+ return -1;
+
+ /* otherwise generate the properly expanded @sys name */
+ prefixCount = (int)(tp - inp);
+
+ strncpy(outp, inp, prefixCount); /* copy out "a." from "a.@sys" */
+ outp[prefixCount] = 0; /* null terminate the "a." */
+ strcat(outp, cm_sysNameList[index]);/* append i386_nt40 */
+ return 1;
+}
+
+#ifdef DEBUG_REFCOUNT
+long cm_LookupDbg(cm_scache_t *dscp, char *namep, long flags, cm_user_t *userp,
+ cm_req_t *reqp, cm_scache_t **outpScpp, char * file, long line)
+#else
+long cm_Lookup(cm_scache_t *dscp, char *namep, long flags, cm_user_t *userp,
+ cm_req_t *reqp, cm_scache_t **outpScpp)
#endif
+{
+ long code;
+ char tname[256];
+ int sysNameIndex = 0;
+ cm_scache_t *scp = NULL;
- /* make sure we don't screw up the dir status during the merge */
- lock_ObtainMutex(&dscp->mx);
- sflags = CM_SCACHESYNC_STOREDATA;
- code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
- lock_ReleaseMutex(&dscp->mx);
- if (code) return code;
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_Lookup dscp 0x%p ref %d", file, line, dscp, dscp->refCount, file, line);
+ osi_Log2(afsd_logp, "cm_Lookup dscp 0x%p ref %d", dscp, dscp->refCount);
+#endif
- /* make the RPC */
- afsFid.Volume = dscp->fid.volume;
- afsFid.Vnode = dscp->fid.vnode;
- afsFid.Unique = dscp->fid.unique;
- do {
- code = cm_Conn(&dscp->fid, userp, reqp, &connp);
- if (code) continue;
-
- code = RXAFS_RemoveFile(connp->callp, &afsFid, namep,
- &newDirStatus, &volSync);
-
- } while (cm_Analyze(connp, userp, reqp,
- &dscp->fid, &volSync, NULL, code));
- code = cm_MapRPCError(code, reqp);
+ if ( stricmp(namep,SMB_IOCTL_FILENAME_NOSLASH) == 0 ) {
+ if (flags & CM_FLAG_CHECKPATH)
+ return CM_ERROR_NOSUCHPATH;
+ else
+ return CM_ERROR_NOSUCHFILE;
+ }
- lock_ObtainMutex(&dscp->mx);
- cm_dnlcRemove(dscp, namep);
- cm_SyncOpDone(dscp, NULL, sflags);
- if (code == 0) cm_MergeStatus(dscp, &newDirStatus, &volSync, userp, 0);
- lock_ReleaseMutex(&dscp->mx);
+ for ( sysNameIndex = 0; sysNameIndex < MAXNUMSYSNAMES; sysNameIndex++) {
+ code = cm_ExpandSysName(namep, tname, sizeof(tname), sysNameIndex);
+ if (code > 0) {
+ code = cm_LookupInternal(dscp, tname, flags, userp, reqp, &scp);
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_LookupInternal (1) code 0x%x dscp 0x%p ref %d scp 0x%p ref %d", file, line, code, dscp, dscp->refCount, scp, scp ? scp->refCount : 0);
+ osi_Log3(afsd_logp, "cm_LookupInternal (1) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
+#endif
+
+ if (code == 0) {
+ *outpScpp = scp;
+ return 0;
+ }
+ if (scp) {
+ cm_ReleaseSCache(scp);
+ scp = NULL;
+ }
+ } else {
+ code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_LookupInternal (2) code 0x%x dscp 0x%p ref %d scp 0x%p ref %d", file, line, code, dscp, dscp->refCount, scp, scp ? scp->refCount : 0);
+ osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
+#endif
+ *outpScpp = scp;
+ return code;
+ }
+ }
+
+ /* None of the possible sysName expansions could be found */
+ if (flags & CM_FLAG_CHECKPATH)
+ return CM_ERROR_NOSUCHPATH;
+ else
+ return CM_ERROR_NOSUCHFILE;
+}
+
+long cm_Unlink(cm_scache_t *dscp, char *namep, cm_user_t *userp, cm_req_t *reqp)
+{
+ long code;
+ cm_conn_t *connp;
+ AFSFid afsFid;
+ int sflags;
+ AFSFetchStatus newDirStatus;
+ AFSVolSync volSync;
+ struct rx_connection * callp;
+#ifdef AFS_FREELANCE_CLIENT
+ if (cm_freelanceEnabled && dscp == cm_data.rootSCachep) {
+ /* deleting a mount point from the root dir. */
+ code = cm_FreelanceRemoveMount(namep);
+ return code;
+ }
+#endif
+
+ /* make sure we don't screw up the dir status during the merge */
+ lock_ObtainMutex(&dscp->mx);
+ sflags = CM_SCACHESYNC_STOREDATA;
+ code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
+ lock_ReleaseMutex(&dscp->mx);
+ if (code)
return code;
+
+ /* make the RPC */
+ afsFid.Volume = dscp->fid.volume;
+ afsFid.Vnode = dscp->fid.vnode;
+ afsFid.Unique = dscp->fid.unique;
+
+ osi_Log1(afsd_logp, "CALL RemoveFile scp 0x%p", dscp);
+ do {
+ code = cm_Conn(&dscp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_RemoveFile(callp, &afsFid, namep,
+ &newDirStatus, &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp, &dscp->fid, &volSync, NULL, NULL, code));
+ code = cm_MapRPCError(code, reqp);
+
+ if (code)
+ osi_Log1(afsd_logp, "CALL RemoveFile FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL RemoveFile SUCCESS");
+
+ lock_ObtainMutex(&dscp->mx);
+ cm_dnlcRemove(dscp, namep);
+ cm_SyncOpDone(dscp, NULL, sflags);
+ if (code == 0)
+ cm_MergeStatus(dscp, &newDirStatus, &volSync, userp, 0);
+ else if (code == CM_ERROR_NOSUCHFILE) {
+ /* windows would not have allowed the request to delete the file
+ * if it did not believe the file existed. therefore, we must
+ * have an inconsistent view of the world.
+ */
+ dscp->cbServerp = NULL;
+ }
+ lock_ReleaseMutex(&dscp->mx);
+
+ return code;
}
/* called with a locked vnode, and fills in the link info.
*/
long cm_HandleLink(cm_scache_t *linkScp, cm_user_t *userp, cm_req_t *reqp)
{
- long code;
- cm_buf_t *bufp;
- long temp;
- osi_hyper_t thyper;
-
- lock_AssertMutex(&linkScp->mx);
- if (!linkScp->mountPointStringp) {
- /* read the link data */
- lock_ReleaseMutex(&linkScp->mx);
- thyper.LowPart = thyper.HighPart = 0;
- code = buf_Get(linkScp, &thyper, &bufp);
- lock_ObtainMutex(&linkScp->mx);
- if (code) return code;
- while (1) {
- code = cm_SyncOp(linkScp, bufp, userp, reqp, 0,
- CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
- if (code) {
- buf_Release(bufp);
- return code;
- }
- if (cm_HaveBuffer(linkScp, bufp, 0)) break;
-
- code = cm_GetBuffer(linkScp, bufp, NULL, userp, reqp);
- if (code) {
- buf_Release(bufp);
- return code;
- }
- } /* while loop to get the data */
-
- /* now if we still have no link read in,
- * copy the data from the buffer */
- if ((temp = linkScp->length.LowPart) >= 1024) {
- buf_Release(bufp);
- return CM_ERROR_TOOBIG;
- }
-
- /* otherwise, it fits; make sure it is still null (could have
- * lost race with someone else referencing this link above),
- * and if so, copy in the data.
- */
- if (linkScp->mountPointStringp == NULL) {
- linkScp->mountPointStringp = malloc(temp+1);
- strncpy(linkScp->mountPointStringp, bufp->datap, temp);
- linkScp->mountPointStringp[temp] = 0; /* null terminate */
- }
+ long code;
+ cm_buf_t *bufp;
+ long temp;
+ osi_hyper_t thyper;
+
+ lock_AssertMutex(&linkScp->mx);
+ if (!linkScp->mountPointStringp[0]) {
+ /* read the link data */
+ lock_ReleaseMutex(&linkScp->mx);
+ thyper.LowPart = thyper.HighPart = 0;
+ code = buf_Get(linkScp, &thyper, &bufp);
+ lock_ObtainMutex(&linkScp->mx);
+ if (code)
+ return code;
+ while (1) {
+ code = cm_SyncOp(linkScp, bufp, userp, reqp, 0,
+ CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
+ if (code) {
buf_Release(bufp);
- } /* don't have sym link contents cached */
-
- return 0;
-}
+ return code;
+ }
+ cm_SyncOpDone(linkScp, bufp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
+
+ if (cm_HaveBuffer(linkScp, bufp, 0))
+ break;
+
+ code = cm_GetBuffer(linkScp, bufp, NULL, userp, reqp);
+ if (code) {
+ buf_Release(bufp);
+ return code;
+ }
+ } /* while loop to get the data */
+
+ /* now if we still have no link read in,
+ * copy the data from the buffer */
+ if ((temp = linkScp->length.LowPart) >= MOUNTPOINTLEN) {
+ buf_Release(bufp);
+ return CM_ERROR_TOOBIG;
+ }
+
+ /* otherwise, it fits; make sure it is still null (could have
+ * lost race with someone else referencing this link above),
+ * and if so, copy in the data.
+ */
+ if (!linkScp->mountPointStringp[0]) {
+ strncpy(linkScp->mountPointStringp, bufp->datap, temp);
+ linkScp->mountPointStringp[temp] = 0; /* null terminate */
+ }
+ buf_Release(bufp);
+ } /* don't have sym link contents cached */
+
+ return 0;
+}
/* called with a held vnode and a path suffix, with the held vnode being a
* symbolic link. Our goal is to generate a new path to interpret, and return
* returned in *newRootScpp, otherwise a null is returned there.
*/
long cm_AssembleLink(cm_scache_t *linkScp, char *pathSuffixp,
- cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
- cm_user_t *userp, cm_req_t *reqp)
+ cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
+ cm_user_t *userp, cm_req_t *reqp)
{
- long code;
- char *linkp;
- cm_space_t *tsp;
-
- lock_ObtainMutex(&linkScp->mx);
- code = cm_HandleLink(linkScp, userp, reqp);
- if (code) goto done;
-
- /* if we may overflow the buffer, bail out; buffer is signficantly
- * bigger than max path length, so we don't really have to worry about
- * being a little conservative here.
- */
- if (strlen(linkScp->mountPointStringp) + strlen(pathSuffixp) + 2
- >= CM_UTILS_SPACESIZE)
- return CM_ERROR_TOOBIG;
-
- tsp = cm_GetSpace();
- linkp = linkScp->mountPointStringp;
- if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
- if (strlen(linkp) > cm_mountRootLen)
- strcpy(tsp->data, linkp+cm_mountRootLen+1);
- else
- tsp->data[0] = 0;
- *newRootScpp = cm_rootSCachep;
- cm_HoldSCache(cm_rootSCachep);
- } else if (*linkp == '\\' || *linkp == '/') {
- /* formerly, this was considered to be from the AFS root,
- but this seems to create problems. instead, we will just
- reject the link */
-#if 0
- strcpy(tsp->data, linkp+1);
- *newRootScpp = cm_rootSCachep;
- cm_HoldSCache(cm_rootSCachep);
-#else
- code = CM_ERROR_NOSUCHPATH;
- goto done;
-#endif
- }
- else {
- /* a relative link */
- strcpy(tsp->data, linkp);
- *newRootScpp = NULL;
+ long code = 0;
+ long len;
+ char *linkp;
+ cm_space_t *tsp;
+
+ lock_ObtainMutex(&linkScp->mx);
+ code = cm_HandleLink(linkScp, userp, reqp);
+ if (code)
+ goto done;
+
+ /* if we may overflow the buffer, bail out; buffer is signficantly
+ * bigger than max path length, so we don't really have to worry about
+ * being a little conservative here.
+ */
+ if (strlen(linkScp->mountPointStringp) + strlen(pathSuffixp) + 2
+ >= CM_UTILS_SPACESIZE)
+ return CM_ERROR_TOOBIG;
+
+ tsp = cm_GetSpace();
+ linkp = linkScp->mountPointStringp;
+ if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
+ if (strlen(linkp) > cm_mountRootLen)
+ strcpy(tsp->data, linkp+cm_mountRootLen+1);
+ else
+ tsp->data[0] = 0;
+ *newRootScpp = cm_data.rootSCachep;
+ cm_HoldSCache(cm_data.rootSCachep);
+ } else if (linkp[0] == '\\' && linkp[1] == '\\') {
+ if (!strnicmp(&linkp[2], cm_NetbiosName, (len = (long)strlen(cm_NetbiosName))))
+ {
+ char * p = &linkp[len + 3];
+ if (strnicmp(p, "all", 3) == 0)
+ p += 4;
+
+ strcpy(tsp->data, p);
+ for (p = tsp->data; *p; p++) {
+ if (*p == '\\')
+ *p = '/';
+ }
+ *newRootScpp = cm_data.rootSCachep;
+ cm_HoldSCache(cm_data.rootSCachep);
+ } else {
+ linkScp->fileType = CM_SCACHETYPE_DFSLINK;
+ strcpy(tsp->data, linkp);
+ *newRootScpp = NULL;
+ code = CM_ERROR_PATH_NOT_COVERED;
}
- if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
- strcat(tsp->data, "\\");
- strcat(tsp->data, pathSuffixp);
- }
- *newSpaceBufferp = tsp;
- code = 0;
+ } else if ( !strnicmp(linkp, "msdfs:", (len = (long)strlen("msdfs:"))) ) {
+ linkScp->fileType = CM_SCACHETYPE_DFSLINK;
+ strcpy(tsp->data, linkp);
+ *newRootScpp = NULL;
+ code = CM_ERROR_PATH_NOT_COVERED;
+ } else if (*linkp == '\\' || *linkp == '/') {
+#if 0
+ /* formerly, this was considered to be from the AFS root,
+ * but this seems to create problems. instead, we will just
+ * reject the link */
+ strcpy(tsp->data, linkp+1);
+ *newRootScpp = cm_data.rootSCachep;
+ cm_HoldSCache(cm_data.rootSCachep);
+#else
+ /* we still copy the link data into the response so that
+ * the user can see what the link points to
+ */
+ linkScp->fileType = CM_SCACHETYPE_INVALID;
+ strcpy(tsp->data, linkp);
+ *newRootScpp = NULL;
+ code = CM_ERROR_NOSUCHPATH;
+#endif
+ } else {
+ /* a relative link */
+ strcpy(tsp->data, linkp);
+ *newRootScpp = NULL;
+ }
+ if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
+ strcat(tsp->data, "\\");
+ strcat(tsp->data, pathSuffixp);
+ }
+ *newSpaceBufferp = tsp;
-done:
- lock_ReleaseMutex(&linkScp->mx);
- return code;
+ done:
+ lock_ReleaseMutex(&linkScp->mx);
+ return code;
}
-
+#ifdef DEBUG_REFCOUNT
+long cm_NameIDbg(cm_scache_t *rootSCachep, char *pathp, long flags,
+ cm_user_t *userp, char *tidPathp, cm_req_t *reqp, cm_scache_t **outScpp,
+ char * file, long line)
+#else
long cm_NameI(cm_scache_t *rootSCachep, char *pathp, long flags,
- cm_user_t *userp, char *tidPathp, cm_req_t *reqp, cm_scache_t **outScpp)
+ cm_user_t *userp, char *tidPathp, cm_req_t *reqp, cm_scache_t **outScpp)
+#endif
{
- long code;
- char *tp; /* ptr moving through input buffer */
- char tc; /* temp char */
- int haveComponent; /* has new component started? */
- char component[256]; /* this is the new component */
- char *cp; /* component name being assembled */
- cm_scache_t *tscp; /* current location in the hierarchy */
- cm_scache_t *nscp; /* next dude down */
- cm_scache_t *dirScp; /* last dir we searched */
- cm_scache_t *linkScp; /* new root for the symlink we just
- * looked up */
- cm_space_t *psp; /* space for current path, if we've hit
- * any symlinks */
- cm_space_t *tempsp; /* temp vbl */
- char *restp; /* rest of the pathname to interpret */
- int symlinkCount; /* count of # of symlinks traversed */
- int extraFlag; /* avoid chasing mt pts for dir cmd */
- int phase = 1; /* 1 = tidPathp, 2 = pathp */
-
- tp = tidPathp;
- if (tp == NULL) {
- tp = pathp;
- phase = 2;
- }
- if (tp == NULL) {
- tp = "";
- }
- haveComponent = 0;
- psp = NULL;
- tscp = rootSCachep;
- cm_HoldSCache(tscp);
- symlinkCount = 0;
- while (1) {
- tc = *tp++;
-
- /* map Unix slashes into DOS ones so we can interpret Unix
- * symlinks properly
- */
- if (tc == '/') tc = '\\';
-
- if (!haveComponent) {
- if (tc == '\\') continue;
- else if (tc == 0) {
- if (phase == 1) {
- phase = 2;
- tp = pathp;
- continue;
- }
+ long code;
+ char *tp; /* ptr moving through input buffer */
+ char tc; /* temp char */
+ int haveComponent; /* has new component started? */
+ char component[256]; /* this is the new component */
+ char *cp; /* component name being assembled */
+ cm_scache_t *tscp; /* current location in the hierarchy */
+ cm_scache_t *nscp; /* next dude down */
+ cm_scache_t *dirScp; /* last dir we searched */
+ cm_scache_t *linkScp; /* new root for the symlink we just
+ * looked up */
+ cm_space_t *psp; /* space for current path, if we've hit
+ * any symlinks */
+ cm_space_t *tempsp; /* temp vbl */
+ char *restp; /* rest of the pathname to interpret */
+ int symlinkCount; /* count of # of symlinks traversed */
+ int extraFlag; /* avoid chasing mt pts for dir cmd */
+ int phase = 1; /* 1 = tidPathp, 2 = pathp */
+
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_NameI rootscp 0x%p ref %d", file, line, rootSCachep, rootSCachep->refCount);
+ osi_Log4(afsd_logp,"cm_NameI rootscp 0x%p path %s tidpath %s flags 0x%x",
+ rootSCachep, pathp ? pathp : "<NULL>", tidPathp ? tidPathp : "<NULL>",
+ flags);
+#endif
+
+ tp = tidPathp;
+ if (tp == NULL) {
+ tp = pathp;
+ phase = 2;
+ }
+ if (tp == NULL) {
+ tp = "";
+ }
+ haveComponent = 0;
+ psp = NULL;
+ tscp = rootSCachep;
+ cm_HoldSCache(tscp);
+ symlinkCount = 0;
+ dirScp = NULL;
+
+
+ while (1) {
+ tc = *tp++;
+
+ /* map Unix slashes into DOS ones so we can interpret Unix
+ * symlinks properly
+ */
+ if (tc == '/')
+ tc = '\\';
+
+ if (!haveComponent) {
+ if (tc == '\\') {
+ continue;
+ } else if (tc == 0) {
+ if (phase == 1) {
+ phase = 2;
+ tp = pathp;
+ continue;
+ }
code = 0;
break;
- }
- else {
- haveComponent = 1;
+ } else {
+ haveComponent = 1;
cp = component;
*cp++ = tc;
}
- }
- else {
- /* we have a component here */
- if (tc == 0 || tc == '\\') {
- /* end of the component; we're at the last
- * component if tc == 0. However, if the last
- * is a symlink, we have more to do.
- */
- *cp++ = 0; /* add null termination */
- extraFlag = 0;
- if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
- extraFlag = CM_FLAG_NOMOUNTCHASE;
- code = cm_Lookup(tscp, component,
- flags | extraFlag,
- userp, reqp, &nscp);
-
- if (code) {
- cm_ReleaseSCache(tscp);
- if (psp) cm_FreeSpace(psp);
- return code;
+ } else {
+ /* we have a component here */
+ if (tc == 0 || tc == '\\') {
+ /* end of the component; we're at the last
+ * component if tc == 0. However, if the last
+ * is a symlink, we have more to do.
+ */
+ *cp++ = 0; /* add null termination */
+ if (!strcmp(".",component)) {
+ code = 0;
+ if (dirScp) {
+ cm_ReleaseSCache(dirScp);
+ dirScp = NULL;
}
- haveComponent = 0; /* component done */
- dirScp = tscp; /* for some symlinks */
- tscp = nscp; /* already held */
- if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
- code = 0;
+ break;
+ }
+ extraFlag = 0;
+ if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
+ extraFlag = CM_FLAG_NOMOUNTCHASE;
+ code = cm_Lookup(tscp, component,
+ flags | extraFlag,
+ userp, reqp, &nscp);
+ if (code) {
+ cm_ReleaseSCache(tscp);
+ if (dirScp)
+ cm_ReleaseSCache(dirScp);
+ if (psp)
+ cm_FreeSpace(psp);
+ if (code == CM_ERROR_NOSUCHFILE && tscp->fileType == CM_SCACHETYPE_SYMLINK) {
+ osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_NOSUCHPATH");
+ return CM_ERROR_NOSUCHPATH;
+ } else {
+ osi_Log1(afsd_logp,"cm_NameI code 0x%x", code);
+ return code;
+ }
+ }
+ haveComponent = 0; /* component done */
+ if (dirScp)
+ cm_ReleaseSCache(dirScp);
+ dirScp = tscp; /* for some symlinks */
+ tscp = nscp; /* already held */
+ nscp = NULL;
+ if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
+ code = 0;
+ if (dirScp) {
cm_ReleaseSCache(dirScp);
- break;
+ dirScp = NULL;
}
+ break;
+ }
- /* now, if tscp is a symlink, we should follow
- * it and assemble the path again.
- */
- lock_ObtainMutex(&tscp->mx);
- code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
- CM_SCACHESYNC_GETSTATUS
- | CM_SCACHESYNC_NEEDCALLBACK);
- if (code) {
- lock_ReleaseMutex(&tscp->mx);
- cm_ReleaseSCache(tscp);
+ /* now, if tscp is a symlink, we should follow
+ * it and assemble the path again.
+ */
+ lock_ObtainMutex(&tscp->mx);
+ code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
+ CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_NEEDCALLBACK);
+ if (code) {
+ lock_ReleaseMutex(&tscp->mx);
+ cm_ReleaseSCache(tscp);
+ tscp = NULL;
+ if (dirScp) {
cm_ReleaseSCache(dirScp);
- break;
+ dirScp = NULL;
}
- if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
- /* this is a symlink; assemble a new buffer */
- lock_ReleaseMutex(&tscp->mx);
- if (symlinkCount++ >= 16) {
- cm_ReleaseSCache(tscp);
+ break;
+ }
+ cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
+
+ if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
+ /* this is a symlink; assemble a new buffer */
+ lock_ReleaseMutex(&tscp->mx);
+ if (symlinkCount++ >= MAX_SYMLINK_COUNT) {
+ cm_ReleaseSCache(tscp);
+ tscp = NULL;
+ if (dirScp) {
cm_ReleaseSCache(dirScp);
- if (psp) cm_FreeSpace(psp);
- return CM_ERROR_TOOBIG;
+ dirScp = NULL;
}
- if (tc == 0) restp = "";
- else restp = tp;
- code = cm_AssembleLink(tscp, restp, &linkScp, &tempsp, userp, reqp);
- if (code) {
- /* something went wrong */
- cm_ReleaseSCache(tscp);
+ if (psp)
+ cm_FreeSpace(psp);
+ osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_TOO_MANY_SYMLINKS");
+ return CM_ERROR_TOO_MANY_SYMLINKS;
+ }
+ if (tc == 0)
+ restp = "";
+ else
+ restp = tp;
+ code = cm_AssembleLink(tscp, restp, &linkScp, &tempsp, userp, reqp);
+ if (code) {
+ /* something went wrong */
+ cm_ReleaseSCache(tscp);
+ tscp = NULL;
+ if (dirScp) {
cm_ReleaseSCache(dirScp);
- break;
+ dirScp = NULL;
}
+ break;
+ }
- /* otherwise, tempsp has the new path,
- * and linkScp is the new root from
- * which to interpret that path.
- * Continue with the namei processing,
- * also doing the bookkeeping for the
- * space allocation and tracking the
- * vnode reference counts.
- */
- if (psp) cm_FreeSpace(psp);
- psp = tempsp;
- tp = psp->data;
- cm_ReleaseSCache(tscp);
- tscp = linkScp; /* already held
- * by AssembleLink */
- /* now, if linkScp is null, that's
- * AssembleLink's way of telling us that
- * the sym link is relative to the dir
- * containing the link. We have a ref
- * to it in dirScp, and we hold it now
- * and reuse it as the new spot in the
- * dir hierarchy.
- */
- if (tscp == NULL) {
- cm_HoldSCache(dirScp);
- tscp = dirScp;
+ /* otherwise, tempsp has the new path,
+ * and linkScp is the new root from
+ * which to interpret that path.
+ * Continue with the namei processing,
+ * also doing the bookkeeping for the
+ * space allocation and tracking the
+ * vnode reference counts.
+ */
+ if (psp)
+ cm_FreeSpace(psp);
+ psp = tempsp;
+ tp = psp->data;
+ cm_ReleaseSCache(tscp);
+ tscp = linkScp;
+ linkScp = NULL;
+ /* already held
+ * by AssembleLink
+ * now, if linkScp is null, that's
+ * AssembleLink's way of telling us that
+ * the sym link is relative to the dir
+ * containing the link. We have a ref
+ * to it in dirScp, and we hold it now
+ * and reuse it as the new spot in the
+ * dir hierarchy.
+ */
+ if (tscp == NULL) {
+ tscp = dirScp;
+ dirScp = NULL;
+ }
+ } else {
+ /* not a symlink, we may be done */
+ lock_ReleaseMutex(&tscp->mx);
+ if (tc == 0) {
+ if (phase == 1) {
+ phase = 2;
+ tp = pathp;
+ continue;
}
- } /* if we have a sym link */
- else {
- /* not a symlink, we may be done */
- lock_ReleaseMutex(&tscp->mx);
- if (tc == 0) {
- if (phase == 1) {
- phase = 2;
- tp = pathp;
- continue;
- }
+ if (dirScp) {
cm_ReleaseSCache(dirScp);
- code = 0;
- break;
+ dirScp = NULL;
}
+ code = 0;
+ break;
}
+ }
+ if (dirScp) {
cm_ReleaseSCache(dirScp);
- } /* end of a component */
- else *cp++ = tc;
- } /* we have a component */
- } /* big while loop over all components */
-
- /* already held */
- if (psp) cm_FreeSpace(psp);
- if (code == 0) *outScpp = tscp;
- return code;
+ dirScp = NULL;
+ }
+ } /* end of a component */
+ else
+ *cp++ = tc;
+ } /* we have a component */
+ } /* big while loop over all components */
+
+ /* already held */
+ if (dirScp)
+ cm_ReleaseSCache(dirScp);
+ if (psp)
+ cm_FreeSpace(psp);
+ if (code == 0)
+ *outScpp = tscp;
+ else if (tscp)
+ cm_ReleaseSCache(tscp);
+
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_NameI code 0x%x outScpp 0x%p ref %d", file, line, code, *outScpp, (*outScpp)->refCount);
+#endif
+ osi_Log2(afsd_logp,"cm_NameI code 0x%x outScpp 0x%p", code, *outScpp);
+ return code;
}
/* called with a dir, and a vnode within the dir that happens to be a symlink.
* The input vnode should not be locked when this function is called.
*/
long cm_EvaluateSymLink(cm_scache_t *dscp, cm_scache_t *linkScp,
- cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
+ cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
{
- long code;
- cm_space_t *spacep;
- cm_scache_t *newRootScp;
+ long code;
+ cm_space_t *spacep;
+ cm_scache_t *newRootScp;
- osi_Log1(afsd_logp, "Evaluating symlink vp %x", linkScp);
+ osi_Log1(afsd_logp, "Evaluating symlink scp 0x%p", linkScp);
- code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
- if (code) return code;
-
- /* now, if newRootScp is NULL, we're really being told that the symlink
- * is relative to the current directory (dscp).
- */
- if (newRootScp == NULL) {
- newRootScp = dscp;
- cm_HoldSCache(dscp);
- }
-
- code = cm_NameI(newRootScp, spacep->data,
- CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
- userp, NULL, reqp, outScpp);
+ code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
+ if (code)
+ return code;
+
+ /* now, if newRootScp is NULL, we're really being told that the symlink
+ * is relative to the current directory (dscp).
+ */
+ if (newRootScp == NULL) {
+ newRootScp = dscp;
+ cm_HoldSCache(dscp);
+ }
- /* this stuff is allocated no matter what happened on the namei call,
- * so free it */
- cm_FreeSpace(spacep);
- cm_ReleaseSCache(newRootScp);
+ code = cm_NameI(newRootScp, spacep->data,
+ CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
+ userp, NULL, reqp, outScpp);
- return code;
+ if (code == CM_ERROR_NOSUCHFILE)
+ code = CM_ERROR_NOSUCHPATH;
+
+ /* this stuff is allocated no matter what happened on the namei call,
+ * so free it */
+ cm_FreeSpace(spacep);
+ cm_ReleaseSCache(newRootScp);
+
+ return code;
}
/* make this big enough so that one buffer of dir pages won't overflow. We'll
* check anyway, but we want to minimize the chance that we have to leave stuff
* unstat'd.
*/
-#define CM_BULKMAX 128
+#define CM_BULKMAX (3 * AFSCBMAX)
/* rock for bulk stat calls */
typedef struct cm_bulkStat {
- osi_hyper_t bufOffset; /* only do it for things in this buffer page */
+ osi_hyper_t bufOffset; /* only do it for things in this buffer page */
- /* info for the actual call */
- int counter; /* next free slot */
- AFSFid fids[CM_BULKMAX];
- AFSFetchStatus stats[CM_BULKMAX];
- AFSCallBack callbacks[CM_BULKMAX];
+ /* info for the actual call */
+ int counter; /* next free slot */
+ AFSFid fids[CM_BULKMAX];
+ AFSFetchStatus stats[CM_BULKMAX];
+ AFSCallBack callbacks[CM_BULKMAX];
} cm_bulkStat_t;
/* for a given entry, make sure that it isn't in the stat cache, and then
* processing, to avoid deadlocks.
*/
long cm_TryBulkProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
- osi_hyper_t *offp)
+ osi_hyper_t *offp)
{
- osi_hyper_t thyper;
- cm_bulkStat_t *bsp;
- int i;
- cm_scache_t *tscp;
- cm_fid_t tfid;
+ osi_hyper_t thyper;
+ cm_bulkStat_t *bsp;
+ int i;
+ cm_scache_t *tscp;
+ cm_fid_t tfid;
+
+ bsp = rockp;
- bsp = rockp;
+ /* Don't overflow bsp. */
+ if (bsp->counter >= CM_BULKMAX)
+ return CM_ERROR_STOPNOW;
- /* Don't overflow bsp. */
- if (bsp->counter >= CM_BULKMAX)
- return CM_ERROR_STOPNOW;
+ thyper.LowPart = cm_data.buf_blockSize;
+ thyper.HighPart = 0;
+ thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
- thyper.LowPart = buf_bufferSize;
- thyper.HighPart = 0;
- thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
-
- /* thyper is now the first byte past the end of the record we're
- * interested in, and bsp->bufOffset is the first byte of the record
- * we're interested in.
- * Skip data in the others.
- * Skip '.' and '..'
- */
- if (LargeIntegerLessThan(*offp, bsp->bufOffset))
- return 0;
- if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
- return CM_ERROR_STOPNOW;
- if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
- return 0;
-
- tfid.cell = scp->fid.cell;
- tfid.volume = scp->fid.volume;
- tfid.vnode = ntohl(dep->fid.vnode);
- tfid.unique = ntohl(dep->fid.unique);
- tscp = cm_FindSCache(&tfid);
- if (tscp) {
- if (lock_TryMutex(&tscp->mx)) {
- /* we have an entry that we can look at */
- if (cm_HaveCallback(tscp)) {
- /* we have a callback on it. Don't bother
- * fetching this stat entry, since we're happy
- * with the info we have.
- */
- lock_ReleaseMutex(&tscp->mx);
- cm_ReleaseSCache(tscp);
- return 0;
- }
- lock_ReleaseMutex(&tscp->mx);
- } /* got lock */
+ /* thyper is now the first byte past the end of the record we're
+ * interested in, and bsp->bufOffset is the first byte of the record
+ * we're interested in.
+ * Skip data in the others.
+ * Skip '.' and '..'
+ */
+ if (LargeIntegerLessThan(*offp, bsp->bufOffset))
+ return 0;
+ if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
+ return CM_ERROR_STOPNOW;
+ if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
+ return 0;
+
+ tfid.cell = scp->fid.cell;
+ tfid.volume = scp->fid.volume;
+ tfid.vnode = ntohl(dep->fid.vnode);
+ tfid.unique = ntohl(dep->fid.unique);
+ tscp = cm_FindSCache(&tfid);
+ if (tscp) {
+ if (lock_TryMutex(&tscp->mx)) {
+ /* we have an entry that we can look at */
+ if (!(tscp->flags & CM_SCACHEFLAG_EACCESS) && cm_HaveCallback(tscp)) {
+ /* we have a callback on it. Don't bother
+ * fetching this stat entry, since we're happy
+ * with the info we have.
+ */
+ lock_ReleaseMutex(&tscp->mx);
cm_ReleaseSCache(tscp);
- } /* found entry */
+ return 0;
+ }
+ lock_ReleaseMutex(&tscp->mx);
+ } /* got lock */
+ cm_ReleaseSCache(tscp);
+ } /* found entry */
#ifdef AFS_FREELANCE_CLIENT
- // yj: if this is a mountpoint under root.afs then we don't want it
- // to be bulkstat-ed, instead, we call getSCache directly and under
- // getSCache, it is handled specially.
- if ( cm_freelanceEnabled &&
+ // yj: if this is a mountpoint under root.afs then we don't want it
+ // to be bulkstat-ed, instead, we call getSCache directly and under
+ // getSCache, it is handled specially.
+ if ( cm_freelanceEnabled &&
tfid.cell==AFS_FAKE_ROOT_CELL_ID &&
tfid.volume==AFS_FAKE_ROOT_VOL_ID &&
!(tfid.vnode==0x1 && tfid.unique==0x1) )
- {
+ {
osi_Log0(afsd_logp, "cm_TryBulkProc Freelance calls cm_SCache on root.afs mountpoint");
- return cm_GetSCache(&tfid, &tscp, NULL, NULL);
- }
+ return cm_GetSCache(&tfid, &tscp, NULL, NULL);
+ }
#endif /* AFS_FREELANCE_CLIENT */
- i = bsp->counter++;
- bsp->fids[i].Volume = scp->fid.volume;
- bsp->fids[i].Vnode = tfid.vnode;
- bsp->fids[i].Unique = tfid.unique;
- return 0;
-}
+ i = bsp->counter++;
+ bsp->fids[i].Volume = scp->fid.volume;
+ bsp->fids[i].Vnode = tfid.vnode;
+ bsp->fids[i].Unique = tfid.unique;
+ return 0;
+}
/* called with a locked scp and a pointer to a buffer. Make bulk stat
* calls on all undeleted files in the page of the directory specified.
*/
-void cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
- cm_req_t *reqp)
+afs_int32
+cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
+ cm_req_t *reqp)
{
- long code;
- cm_bulkStat_t bb; /* this is *BIG*, probably 12K or so;
- * watch for stack problems */
- AFSCBFids fidStruct;
- AFSBulkStats statStruct;
- cm_conn_t *connp;
- AFSCBs callbackStruct;
- long filex;
- AFSVolSync volSync;
- cm_callbackRequest_t cbReq;
- long filesThisCall;
- long i;
- long j;
- cm_scache_t *scp;
- cm_fid_t tfid;
-
- osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%x", (long) dscp);
-
- /* should be on a buffer boundary */
- osi_assert((offsetp->LowPart & (buf_bufferSize - 1)) == 0);
-
- bb.counter = 0;
- bb.bufOffset = *offsetp;
-
- /* first, assemble the file IDs we need to stat */
- code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) &bb, offsetp, userp,
- reqp, NULL);
-
- /* if we failed, bail out early */
- if (code && code != CM_ERROR_STOPNOW) return;
-
- /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
- * make the calls to create the entries. Handle AFSCBMAX files at a
- * time.
+ long code;
+ cm_bulkStat_t bb; /* this is *BIG*, probably 16K or so;
+ * watch for stack problems */
+ AFSCBFids fidStruct;
+ AFSBulkStats statStruct;
+ cm_conn_t *connp;
+ AFSCBs callbackStruct;
+ long filex;
+ AFSVolSync volSync;
+ cm_callbackRequest_t cbReq;
+ long filesThisCall;
+ long i;
+ long j;
+ cm_scache_t *scp;
+ cm_fid_t tfid;
+ struct rx_connection * callp;
+ int inlinebulk = 0; /* Did we use InlineBulkStatus RPC or not? */
+
+ osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%p", dscp);
+
+ /* should be on a buffer boundary */
+ osi_assert((offsetp->LowPart & (cm_data.buf_blockSize - 1)) == 0);
+
+ memset(&bb, 0, sizeof(bb));
+ bb.bufOffset = *offsetp;
+
+ lock_ReleaseMutex(&dscp->mx);
+ /* first, assemble the file IDs we need to stat */
+ code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) &bb, offsetp, userp, reqp, NULL);
+
+ /* if we failed, bail out early */
+ if (code && code != CM_ERROR_STOPNOW) {
+ lock_ObtainMutex(&dscp->mx);
+ return code;
+ }
+
+ /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
+ * make the calls to create the entries. Handle AFSCBMAX files at a
+ * time.
+ */
+ filex = 0;
+ while (filex < bb.counter) {
+ filesThisCall = bb.counter - filex;
+ if (filesThisCall > AFSCBMAX)
+ filesThisCall = AFSCBMAX;
+
+ fidStruct.AFSCBFids_len = filesThisCall;
+ fidStruct.AFSCBFids_val = &bb.fids[filex];
+ statStruct.AFSBulkStats_len = filesThisCall;
+ statStruct.AFSBulkStats_val = &bb.stats[filex];
+ callbackStruct.AFSCBs_len = filesThisCall;
+ callbackStruct.AFSCBs_val = &bb.callbacks[filex];
+ cm_StartCallbackGrantingCall(NULL, &cbReq);
+ osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
+ do {
+ code = cm_Conn(&dscp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ callp = cm_GetRxConn(connp);
+ if (!(connp->serverp->flags & CM_SERVERFLAG_NOINLINEBULK)) {
+ code = RXAFS_InlineBulkStatus(callp, &fidStruct,
+ &statStruct, &callbackStruct, &volSync);
+ if (code == RXGEN_OPCODE) {
+ cm_SetServerNoInlineBulk(connp->serverp, 0);
+ } else {
+ inlinebulk = 1;
+ }
+ }
+ if (!inlinebulk) {
+ code = RXAFS_BulkStatus(callp, &fidStruct,
+ &statStruct, &callbackStruct, &volSync);
+ }
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp, &dscp->fid,
+ &volSync, NULL, &cbReq, code));
+ code = cm_MapRPCError(code, reqp);
+ if (code)
+ osi_Log2(afsd_logp, "CALL %sBulkStatus FAILURE code 0x%x",
+ inlinebulk ? "Inline" : "", code);
+ else
+ osi_Log1(afsd_logp, "CALL %sBulkStatus SUCCESS", inlinebulk ? "Inline" : "");
+
+ /* may as well quit on an error, since we're not going to do
+ * much better on the next immediate call, either.
*/
- filex = 0;
- while(filex < bb.counter) {
- filesThisCall = bb.counter - filex;
- if (filesThisCall > AFSCBMAX) filesThisCall = AFSCBMAX;
-
- fidStruct.AFSCBFids_len = filesThisCall;
- fidStruct.AFSCBFids_val = &bb.fids[filex];
- statStruct.AFSBulkStats_len = filesThisCall;
- statStruct.AFSBulkStats_val = &bb.stats[filex];
- callbackStruct.AFSCBs_len = filesThisCall;
- callbackStruct.AFSCBs_val = &bb.callbacks[filex];
- cm_StartCallbackGrantingCall(NULL, &cbReq);
- osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
- do {
- code = cm_Conn(&dscp->fid, userp, reqp, &connp);
- if (code) continue;
-
- code = RXAFS_BulkStatus(connp->callp, &fidStruct,
- &statStruct, &callbackStruct, &volSync);
+ if (code) {
+ cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
+ break;
+ }
- } while (cm_Analyze(connp, userp, reqp, &dscp->fid,
- &volSync, &cbReq, code));
- code = cm_MapRPCError(code, reqp);
+ /* otherwise, we should do the merges */
+ for (i = 0; i<filesThisCall; i++) {
+ j = filex + i;
+ tfid.cell = dscp->fid.cell;
+ tfid.volume = bb.fids[j].Volume;
+ tfid.vnode = bb.fids[j].Vnode;
+ tfid.unique = bb.fids[j].Unique;
+ code = cm_GetSCache(&tfid, &scp, userp, reqp);
+ if (code != 0)
+ continue;
+
+ /* otherwise, if this entry has no callback info,
+ * merge in this.
+ */
+ lock_ObtainMutex(&scp->mx);
+ /* now, we have to be extra paranoid on merging in this
+ * information, since we didn't use cm_SyncOp before
+ * starting the fetch to make sure that no bad races
+ * were occurring. Specifically, we need to make sure
+ * we don't obliterate any newer information in the
+ * vnode than have here.
+ *
+ * Right now, be pretty conservative: if there's a
+ * callback or a pending call, skip it.
+ */
+ if ((scp->cbServerp == NULL || (scp->flags & CM_SCACHEFLAG_EACCESS))
+ && !(scp->flags &
+ (CM_SCACHEFLAG_FETCHING
+ | CM_SCACHEFLAG_STORING
+ | CM_SCACHEFLAG_SIZESTORING))) {
+ cm_EndCallbackGrantingCall(scp, &cbReq,
+ &bb.callbacks[j],
+ CM_CALLBACK_MAINTAINCOUNT);
+ cm_MergeStatus(scp, &bb.stats[j], &volSync, userp, 0);
+ }
+ lock_ReleaseMutex(&scp->mx);
+ cm_ReleaseSCache(scp);
+ } /* all files in the response */
+ /* now tell it to drop the count,
+ * after doing the vnode processing above */
+ cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
+
+ filex += filesThisCall;
+ } /* while there are still more files to process */
+ lock_ObtainMutex(&dscp->mx);
- osi_Log0(afsd_logp, "CALL BulkStatus DONE");
-
- /* may as well quit on an error, since we're not going to do
- * much better on the next immediate call, either.
- */
- if (code) break;
-
- /* otherwise, we should do the merges */
- for(i = 0; i<filesThisCall; i++) {
- j = filex + i;
- tfid.cell = dscp->fid.cell;
- tfid.volume = bb.fids[j].Volume;
- tfid.vnode = bb.fids[j].Vnode;
- tfid.unique = bb.fids[j].Unique;
- code = cm_GetSCache(&tfid, &scp, userp, reqp);
- if (code != 0) continue;
-
- /* otherwise, if this entry has no callback info,
- * merge in this.
- */
- lock_ObtainMutex(&scp->mx);
- /* now, we have to be extra paranoid on merging in this
- * information, since we didn't use cm_SyncOp before
- * starting the fetch to make sure that no bad races
- * were occurring. Specifically, we need to make sure
- * we don't obliterate any newer information in the
- * vnode than have here.
- *
- * Right now, be pretty conservative: if there's a
- * callback or a pending call, skip it.
- */
- if (scp->cbServerp == NULL
- && !(scp->flags &
- (CM_SCACHEFLAG_FETCHING
- | CM_SCACHEFLAG_STORING
- | CM_SCACHEFLAG_SIZESTORING))) {
- cm_EndCallbackGrantingCall(scp, &cbReq,
- &bb.callbacks[j],
- CM_CALLBACK_MAINTAINCOUNT);
- cm_MergeStatus(scp, &bb.stats[j], &volSync,
- userp, 0);
- }
- lock_ReleaseMutex(&scp->mx);
- cm_ReleaseSCache(scp);
- } /* all files in the response */
- /* now tell it to drop the count,
- * after doing the vnode processing above */
- cm_EndCallbackGrantingCall(NULL, NULL, NULL, 0);
-
- filex += filesThisCall;
- } /* while there are still more files to process */
- osi_Log0(afsd_logp, "END cm_TryBulkStat");
-}
+#if 0
+ /* If we did the InlineBulk RPC pull out the return code */
+ if (inlinebulk) {
+ if ((&bb.stats[0])->errorCode) {
+ cm_Analyze(NULL /*connp was released by the previous cm_Analyze */,
+ userp, reqp, &dscp->fid, &volSync, NULL, NULL, (&bb.stats[0])->errorCode);
+ code = cm_MapRPCError((&bb.stats[0])->errorCode, reqp);
+ }
+ } else
+#endif
+ {
+ code = 0;
+ }
+
+ osi_Log1(afsd_logp, "END cm_TryBulkStat code = 0x%x", code);
+ return code;
+}
void cm_StatusFromAttr(AFSStoreStatus *statusp, cm_scache_t *scp, cm_attr_t *attrp)
{
- long mask;
-
- /* initialize store back mask as inexpensive local variable */
- mask = 0;
- memset(statusp, 0, sizeof(AFSStoreStatus));
-
- /* copy out queued info from scache first, if scp passed in */
- if (scp) {
- if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
- statusp->ClientModTime = scp->clientModTime;
- mask |= AFS_SETMODTIME;
- scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
- }
- }
+ long mask;
+
+ /* initialize store back mask as inexpensive local variable */
+ mask = 0;
+ memset(statusp, 0, sizeof(AFSStoreStatus));
+
+ /* copy out queued info from scache first, if scp passed in */
+ if (scp) {
+ if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
+ statusp->ClientModTime = scp->clientModTime;
+ mask |= AFS_SETMODTIME;
+ scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
+ }
+ }
- if (attrp) {
- /* now add in our locally generated request */
- if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
- statusp->ClientModTime = attrp->clientModTime;
- mask |= AFS_SETMODTIME;
- }
- if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
- statusp->UnixModeBits = attrp->unixModeBits;
- mask |= AFS_SETMODE;
- }
- if (attrp->mask & CM_ATTRMASK_OWNER) {
- statusp->Owner = attrp->owner;
- mask |= AFS_SETOWNER;
- }
- if (attrp->mask & CM_ATTRMASK_GROUP) {
- statusp->Group = attrp->group;
- mask |= AFS_SETGROUP;
- }
- }
- statusp->Mask = mask;
-}
+ if (attrp) {
+ /* now add in our locally generated request */
+ if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
+ statusp->ClientModTime = attrp->clientModTime;
+ mask |= AFS_SETMODTIME;
+ }
+ if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
+ statusp->UnixModeBits = attrp->unixModeBits;
+ mask |= AFS_SETMODE;
+ }
+ if (attrp->mask & CM_ATTRMASK_OWNER) {
+ statusp->Owner = attrp->owner;
+ mask |= AFS_SETOWNER;
+ }
+ if (attrp->mask & CM_ATTRMASK_GROUP) {
+ statusp->Group = attrp->group;
+ mask |= AFS_SETGROUP;
+ }
+ }
+ statusp->Mask = mask;
+}
/* set the file size, and make sure that all relevant buffers have been
* truncated. Ensure that any partially truncated buffers have been zeroed
* to the end of the buffer.
*/
long cm_SetLength(cm_scache_t *scp, osi_hyper_t *sizep, cm_user_t *userp,
- cm_req_t *reqp)
+ cm_req_t *reqp)
{
- long code;
- int shrinking;
+ long code;
+ int shrinking;
+
+ /* start by locking out buffer creation */
+ lock_ObtainWrite(&scp->bufCreateLock);
+
+ /* verify that this is a file, not a dir or a symlink */
+ lock_ObtainMutex(&scp->mx);
+ code = cm_SyncOp(scp, NULL, userp, reqp, 0,
+ CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
+ if (code)
+ goto done;
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
+
+ if (scp->fileType != CM_SCACHETYPE_FILE) {
+ code = CM_ERROR_ISDIR;
+ goto done;
+ }
- /* start by locking out buffer creation */
- lock_ObtainWrite(&scp->bufCreateLock);
+ startover:
+ if (LargeIntegerLessThan(*sizep, scp->length))
+ shrinking = 1;
+ else
+ shrinking = 0;
- /* verify that this is a file, not a dir or a symlink */
- lock_ObtainMutex(&scp->mx);
- code = cm_SyncOp(scp, NULL, userp, reqp, 0,
- CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
- if (code) goto done;
-
- if (scp->fileType != CM_SCACHETYPE_FILE) {
- code = CM_ERROR_ISDIR;
- goto done;
- }
+ lock_ReleaseMutex(&scp->mx);
-startover:
- if (LargeIntegerLessThan(*sizep, scp->length))
- shrinking = 1;
- else
- shrinking = 0;
+ /* can't hold scp->mx lock here, since we may wait for a storeback to
+ * finish if the buffer package is cleaning a buffer by storing it to
+ * the server.
+ */
+ if (shrinking)
+ buf_Truncate(scp, userp, reqp, sizep);
- lock_ReleaseMutex(&scp->mx);
+ /* now ensure that file length is short enough, and update truncPos */
+ lock_ObtainMutex(&scp->mx);
- /* can't hold scp->mx lock here, since we may wait for a storeback to
- * finish if the buffer package is cleaning a buffer by storing it to
- * the server.
- */
- if (shrinking)
- buf_Truncate(scp, userp, reqp, sizep);
-
- /* now ensure that file length is short enough, and update truncPos */
- lock_ObtainMutex(&scp->mx);
-
- /* make sure we have a callback (so we have the right value for the
- * length), and wait for it to be safe to do a truncate.
+ /* make sure we have a callback (so we have the right value for the
+ * length), and wait for it to be safe to do a truncate.
+ */
+ code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
+ CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
+ if (code)
+ goto done;
+
+ if (LargeIntegerLessThan(*sizep, scp->length)) {
+ /* a real truncation. If truncPos is not set yet, or is bigger
+ * than where we're truncating the file, set truncPos to this
+ * new value.
*/
- code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
- CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
- | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
- if (code) goto done;
-
- if (LargeIntegerLessThan(*sizep, scp->length)) {
- /* a real truncation. If truncPos is not set yet, or is bigger
- * than where we're truncating the file, set truncPos to this
- * new value.
- */
- if (!shrinking)
- goto startover;
- if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
- || LargeIntegerLessThan(*sizep, scp->length)) {
- /* set trunc pos */
- scp->truncPos = *sizep;
- scp->mask |= CM_SCACHEMASK_TRUNCPOS;
- }
- /* in either case, the new file size has been changed */
- scp->length = *sizep;
- scp->mask |= CM_SCACHEMASK_LENGTH;
+ if (!shrinking)
+ goto startover;
+ if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
+ || LargeIntegerLessThan(*sizep, scp->length)) {
+ /* set trunc pos */
+ scp->truncPos = *sizep;
+ scp->mask |= CM_SCACHEMASK_TRUNCPOS;
}
- else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
- /* really extending the file */
- scp->length = *sizep;
- scp->mask |= CM_SCACHEMASK_LENGTH;
- }
+ /* in either case, the new file size has been changed */
+ scp->length = *sizep;
+ scp->mask |= CM_SCACHEMASK_LENGTH;
+ }
+ else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
+ /* really extending the file */
+ scp->length = *sizep;
+ scp->mask |= CM_SCACHEMASK_LENGTH;
+ }
- /* done successfully */
- code = 0;
+ /* done successfully */
+ code = 0;
-done:
- lock_ReleaseMutex(&scp->mx);
- lock_ReleaseWrite(&scp->bufCreateLock);
+ cm_SyncOpDone(scp, NULL,
+ CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
- return code;
+ done:
+ lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseWrite(&scp->bufCreateLock);
+
+ return code;
}
/* set the file size or other attributes (but not both at once) */
long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
- cm_req_t *reqp)
+ cm_req_t *reqp)
{
- long code;
- int flags;
- AFSFetchStatus afsOutStatus;
- AFSVolSync volSync;
- cm_conn_t *connp;
- AFSFid tfid;
- AFSStoreStatus afsInStatus;
-
- /* handle file length setting */
- if (attrp->mask & CM_ATTRMASK_LENGTH)
- return cm_SetLength(scp, &attrp->length, userp, reqp);
-
- flags = CM_SCACHESYNC_STORESTATUS;
-
- lock_ObtainMutex(&scp->mx);
- /* otherwise, we have to make an RPC to get the status */
- code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
-
- /* make the attr structure */
- cm_StatusFromAttr(&afsInStatus, scp, attrp);
-
+ long code;
+ AFSFetchStatus afsOutStatus;
+ AFSVolSync volSync;
+ cm_conn_t *connp;
+ AFSFid tfid;
+ AFSStoreStatus afsInStatus;
+ struct rx_connection * callp;
+
+ /* handle file length setting */
+ if (attrp->mask & CM_ATTRMASK_LENGTH)
+ return cm_SetLength(scp, &attrp->length, userp, reqp);
+
+ lock_ObtainMutex(&scp->mx);
+ /* otherwise, we have to make an RPC to get the status */
+ code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
+ if (code) {
lock_ReleaseMutex(&scp->mx);
- if (code) return code;
-
- /* now make the RPC */
- osi_Log1(afsd_logp, "CALL StoreStatus vp %x", (long) scp);
- tfid.Volume = scp->fid.volume;
- tfid.Vnode = scp->fid.vnode;
- tfid.Unique = scp->fid.unique;
- do {
- code = cm_Conn(&scp->fid, userp, reqp, &connp);
- if (code) continue;
-
- code = RXAFS_StoreStatus(connp->callp, &tfid,
- &afsInStatus, &afsOutStatus, &volSync);
+ return code;
+ }
- } while (cm_Analyze(connp, userp, reqp,
- &scp->fid, &volSync, NULL, code));
- code = cm_MapRPCError(code, reqp);
+ /* make the attr structure */
+ cm_StatusFromAttr(&afsInStatus, scp, attrp);
- osi_Log1(afsd_logp, "CALL StoreStatus DONE, code %d", code);
+ tfid.Volume = scp->fid.volume;
+ tfid.Vnode = scp->fid.vnode;
+ tfid.Unique = scp->fid.unique;
+ lock_ReleaseMutex(&scp->mx);
- lock_ObtainMutex(&scp->mx);
- cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
- if (code == 0)
- cm_MergeStatus(scp, &afsOutStatus, &volSync, userp,
- CM_MERGEFLAG_FORCE);
+ /* now make the RPC */
+ osi_Log1(afsd_logp, "CALL StoreStatus scp 0x%p", scp);
+ do {
+ code = cm_Conn(&scp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_StoreStatus(callp, &tfid,
+ &afsInStatus, &afsOutStatus, &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp,
+ &scp->fid, &volSync, NULL, NULL, code));
+ code = cm_MapRPCError(code, reqp);
+
+ if (code)
+ osi_Log1(afsd_logp, "CALL StoreStatus FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL StoreStatus SUCCESS");
+
+ lock_ObtainMutex(&scp->mx);
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
+ if (code == 0)
+ cm_MergeStatus(scp, &afsOutStatus, &volSync, userp,
+ CM_MERGEFLAG_FORCE);
- /* if we're changing the mode bits, discard the ACL cache,
- * since we changed the mode bits.
- */
- if (afsInStatus.Mask & AFS_SETMODE) cm_FreeAllACLEnts(scp);
- lock_ReleaseMutex(&scp->mx);
- return code;
-}
+ /* if we're changing the mode bits, discard the ACL cache,
+ * since we changed the mode bits.
+ */
+ if (afsInStatus.Mask & AFS_SETMODE) cm_FreeAllACLEnts(scp);
+ lock_ReleaseMutex(&scp->mx);
+ return code;
+}
long cm_Create(cm_scache_t *dscp, char *namep, long flags, cm_attr_t *attrp,
- cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
-{
- cm_conn_t *connp;
- long code;
- AFSFid dirAFSFid;
- cm_callbackRequest_t cbReq;
- AFSFid newAFSFid;
- cm_fid_t newFid;
- cm_scache_t *scp;
- int didEnd;
- AFSStoreStatus inStatus;
- AFSFetchStatus updatedDirStatus;
- AFSFetchStatus newFileStatus;
- AFSCallBack newFileCallback;
- AFSVolSync volSync;
-
- /* can't create names with @sys in them; must expand it manually first.
- * return "invalid request" if they try.
- */
- if (cm_ExpandSysName(namep, NULL, 0)) {
- return CM_ERROR_ATSYS;
- }
+ cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
+{
+ cm_conn_t *connp;
+ long code;
+ AFSFid dirAFSFid;
+ cm_callbackRequest_t cbReq;
+ AFSFid newAFSFid;
+ cm_fid_t newFid;
+ cm_scache_t *scp;
+ int didEnd;
+ AFSStoreStatus inStatus;
+ AFSFetchStatus updatedDirStatus;
+ AFSFetchStatus newFileStatus;
+ AFSCallBack newFileCallback;
+ AFSVolSync volSync;
+ struct rx_connection * callp;
+
+ /* can't create names with @sys in them; must expand it manually first.
+ * return "invalid request" if they try.
+ */
+ if (cm_ExpandSysName(namep, NULL, 0, 0)) {
+ return CM_ERROR_ATSYS;
+ }
- /* before starting the RPC, mark that we're changing the file data, so
- * that someone who does a chmod will know to wait until our call
- * completes.
- */
- lock_ObtainMutex(&dscp->mx);
- code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_StartCallbackGrantingCall(NULL, &cbReq);
- }
- lock_ReleaseMutex(&dscp->mx);
- if (code) {
- return code;
- }
- didEnd = 0;
+ /* before starting the RPC, mark that we're changing the file data, so
+ * that someone who does a chmod will know to wait until our call
+ * completes.
+ */
+ lock_ObtainMutex(&dscp->mx);
+ code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_StartCallbackGrantingCall(NULL, &cbReq);
+ }
+ lock_ReleaseMutex(&dscp->mx);
+ if (code) {
+ return code;
+ }
+ didEnd = 0;
- cm_StatusFromAttr(&inStatus, NULL, attrp);
+ cm_StatusFromAttr(&inStatus, NULL, attrp);
- /* try the RPC now */
- do {
- code = cm_Conn(&dscp->fid, userp, reqp, &connp);
- if (code) continue;
-
- dirAFSFid.Volume = dscp->fid.volume;
- dirAFSFid.Vnode = dscp->fid.vnode;
- dirAFSFid.Unique = dscp->fid.unique;
- code = RXAFS_CreateFile(connp->callp, &dirAFSFid, namep,
- &inStatus, &newAFSFid, &newFileStatus,
- &updatedDirStatus, &newFileCallback,
- &volSync);
- } while (cm_Analyze(connp, userp, reqp,
- &dscp->fid, &volSync, &cbReq, code));
- code = cm_MapRPCError(code, reqp);
+ /* try the RPC now */
+ osi_Log1(afsd_logp, "CALL CreateFile scp 0x%p", dscp);
+ do {
+ code = cm_Conn(&dscp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ dirAFSFid.Volume = dscp->fid.volume;
+ dirAFSFid.Vnode = dscp->fid.vnode;
+ dirAFSFid.Unique = dscp->fid.unique;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_CreateFile(connp->callp, &dirAFSFid, namep,
+ &inStatus, &newAFSFid, &newFileStatus,
+ &updatedDirStatus, &newFileCallback,
+ &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp,
+ &dscp->fid, &volSync, NULL, &cbReq, code));
+ code = cm_MapRPCError(code, reqp);
- lock_ObtainMutex(&dscp->mx);
- cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
- }
- lock_ReleaseMutex(&dscp->mx);
+ if (code)
+ osi_Log1(afsd_logp, "CALL CreateFile FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL CreateFile SUCCESS");
+
+ lock_ObtainMutex(&dscp->mx);
+ cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
+ }
+ lock_ReleaseMutex(&dscp->mx);
- /* now try to create the file's entry, too, but be careful to
- * make sure that we don't merge in old info. Since we weren't locking
- * out any requests during the file's creation, we may have pretty old
- * info.
- */
- if (code == 0) {
- newFid.cell = dscp->fid.cell;
- newFid.volume = dscp->fid.volume;
- newFid.vnode = newAFSFid.Vnode;
- newFid.unique = newAFSFid.Unique;
- code = cm_GetSCache(&newFid, &scp, userp, reqp);
- if (code == 0) {
- lock_ObtainMutex(&scp->mx);
- if (!cm_HaveCallback(scp)) {
- cm_MergeStatus(scp, &newFileStatus, &volSync,
- userp, 0);
- cm_EndCallbackGrantingCall(scp, &cbReq,
- &newFileCallback, 0);
- didEnd = 1;
- }
- lock_ReleaseMutex(&scp->mx);
- *scpp = scp;
- }
+ /* now try to create the file's entry, too, but be careful to
+ * make sure that we don't merge in old info. Since we weren't locking
+ * out any requests during the file's creation, we may have pretty old
+ * info.
+ */
+ if (code == 0) {
+ newFid.cell = dscp->fid.cell;
+ newFid.volume = dscp->fid.volume;
+ newFid.vnode = newAFSFid.Vnode;
+ newFid.unique = newAFSFid.Unique;
+ code = cm_GetSCache(&newFid, &scp, userp, reqp);
+ if (code == 0) {
+ lock_ObtainMutex(&scp->mx);
+ scp->creator = userp; /* remember who created it */
+ if (!cm_HaveCallback(scp)) {
+ cm_MergeStatus(scp, &newFileStatus, &volSync,
+ userp, 0);
+ cm_EndCallbackGrantingCall(scp, &cbReq,
+ &newFileCallback, 0);
+ didEnd = 1;
+ }
+ lock_ReleaseMutex(&scp->mx);
+ *scpp = scp;
}
-
- /* make sure we end things properly */
- if (!didEnd)
- cm_EndCallbackGrantingCall(NULL, NULL, NULL, 0);
+ }
- return code;
-}
+ /* make sure we end things properly */
+ if (!didEnd)
+ cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
+
+ return code;
+}
long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
{
- long code;
+ long code;
- lock_ObtainWrite(&scp->bufCreateLock);
- code = buf_CleanVnode(scp, userp, reqp);
- lock_ReleaseWrite(&scp->bufCreateLock);
- if (code == 0) {
- lock_ObtainMutex(&scp->mx);
- scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA
- | CM_SCACHEFLAG_OUTOFSPACE);
- if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
- | CM_SCACHEMASK_CLIENTMODTIME
- | CM_SCACHEMASK_LENGTH))
- code = cm_StoreMini(scp, userp, reqp);
- lock_ReleaseMutex(&scp->mx);
+ lock_ObtainWrite(&scp->bufCreateLock);
+ code = buf_CleanVnode(scp, userp, reqp);
+ lock_ReleaseWrite(&scp->bufCreateLock);
+ if (code == 0) {
+ lock_ObtainMutex(&scp->mx);
+
+ if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
+ | CM_SCACHEMASK_CLIENTMODTIME
+ | CM_SCACHEMASK_LENGTH))
+ code = cm_StoreMini(scp, userp, reqp);
+
+ if (scp->flags & (CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE)) {
+ code = (scp->flags & CM_SCACHEFLAG_OVERQUOTA) ? CM_ERROR_QUOTA : CM_ERROR_SPACE;
+ scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE);
}
- return code;
+
+ lock_ReleaseMutex(&scp->mx);
+ }
+ return code;
}
long cm_MakeDir(cm_scache_t *dscp, char *namep, long flags, cm_attr_t *attrp,
- cm_user_t *userp, cm_req_t *reqp)
+ cm_user_t *userp, cm_req_t *reqp)
{
- cm_conn_t *connp;
- long code;
- AFSFid dirAFSFid;
- cm_callbackRequest_t cbReq;
- AFSFid newAFSFid;
- cm_fid_t newFid;
- cm_scache_t *scp;
- int didEnd;
- AFSStoreStatus inStatus;
- AFSFetchStatus updatedDirStatus;
- AFSFetchStatus newDirStatus;
- AFSCallBack newDirCallback;
- AFSVolSync volSync;
-
- /* can't create names with @sys in them; must expand it manually first.
- * return "invalid request" if they try.
- */
- if (cm_ExpandSysName(namep, NULL, 0)) {
- return CM_ERROR_ATSYS;
- }
+ cm_conn_t *connp;
+ long code;
+ AFSFid dirAFSFid;
+ cm_callbackRequest_t cbReq;
+ AFSFid newAFSFid;
+ cm_fid_t newFid;
+ cm_scache_t *scp;
+ int didEnd;
+ AFSStoreStatus inStatus;
+ AFSFetchStatus updatedDirStatus;
+ AFSFetchStatus newDirStatus;
+ AFSCallBack newDirCallback;
+ AFSVolSync volSync;
+ struct rx_connection * callp;
+
+ /* can't create names with @sys in them; must expand it manually first.
+ * return "invalid request" if they try.
+ */
+ if (cm_ExpandSysName(namep, NULL, 0, 0)) {
+ return CM_ERROR_ATSYS;
+ }
- /* before starting the RPC, mark that we're changing the directory
- * data, so that someone who does a chmod on the dir will wait until
- * our call completes.
- */
- lock_ObtainMutex(&dscp->mx);
- code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_StartCallbackGrantingCall(NULL, &cbReq);
- }
- lock_ReleaseMutex(&dscp->mx);
- if (code) {
- return code;
- }
- didEnd = 0;
+ /* before starting the RPC, mark that we're changing the directory
+ * data, so that someone who does a chmod on the dir will wait until
+ * our call completes.
+ */
+ lock_ObtainMutex(&dscp->mx);
+ code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_StartCallbackGrantingCall(NULL, &cbReq);
+ }
+ lock_ReleaseMutex(&dscp->mx);
+ if (code) {
+ return code;
+ }
+ didEnd = 0;
- cm_StatusFromAttr(&inStatus, NULL, attrp);
+ cm_StatusFromAttr(&inStatus, NULL, attrp);
- /* try the RPC now */
- do {
- code = cm_Conn(&dscp->fid, userp, reqp, &connp);
- if (code) continue;
-
- dirAFSFid.Volume = dscp->fid.volume;
- dirAFSFid.Vnode = dscp->fid.vnode;
- dirAFSFid.Unique = dscp->fid.unique;
- code = RXAFS_MakeDir(connp->callp, &dirAFSFid, namep,
- &inStatus, &newAFSFid, &newDirStatus,
- &updatedDirStatus, &newDirCallback,
- &volSync);
- } while (cm_Analyze(connp, userp, reqp,
- &dscp->fid, &volSync, &cbReq, code));
- code = cm_MapRPCError(code, reqp);
+ /* try the RPC now */
+ osi_Log1(afsd_logp, "CALL MakeDir scp 0x%p", dscp);
+ do {
+ code = cm_Conn(&dscp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ dirAFSFid.Volume = dscp->fid.volume;
+ dirAFSFid.Vnode = dscp->fid.vnode;
+ dirAFSFid.Unique = dscp->fid.unique;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_MakeDir(connp->callp, &dirAFSFid, namep,
+ &inStatus, &newAFSFid, &newDirStatus,
+ &updatedDirStatus, &newDirCallback,
+ &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp,
+ &dscp->fid, &volSync, NULL, &cbReq, code));
+ code = cm_MapRPCError(code, reqp);
- lock_ObtainMutex(&dscp->mx);
- cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
- }
- lock_ReleaseMutex(&dscp->mx);
+ if (code)
+ osi_Log1(afsd_logp, "CALL MakeDir FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL MakeDir SUCCESS");
+
+ lock_ObtainMutex(&dscp->mx);
+ cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
+ }
+ lock_ReleaseMutex(&dscp->mx);
- /* now try to create the new dir's entry, too, but be careful to
- * make sure that we don't merge in old info. Since we weren't locking
- * out any requests during the file's creation, we may have pretty old
- * info.
- */
- if (code == 0) {
- newFid.cell = dscp->fid.cell;
- newFid.volume = dscp->fid.volume;
- newFid.vnode = newAFSFid.Vnode;
- newFid.unique = newAFSFid.Unique;
- code = cm_GetSCache(&newFid, &scp, userp, reqp);
- if (code == 0) {
- lock_ObtainMutex(&scp->mx);
- if (!cm_HaveCallback(scp)) {
- cm_MergeStatus(scp, &newDirStatus, &volSync,
- userp, 0);
- cm_EndCallbackGrantingCall(scp, &cbReq,
- &newDirCallback, 0);
- didEnd = 1;
- }
- lock_ReleaseMutex(&scp->mx);
- cm_ReleaseSCache(scp);
- }
+ /* now try to create the new dir's entry, too, but be careful to
+ * make sure that we don't merge in old info. Since we weren't locking
+ * out any requests during the file's creation, we may have pretty old
+ * info.
+ */
+ if (code == 0) {
+ newFid.cell = dscp->fid.cell;
+ newFid.volume = dscp->fid.volume;
+ newFid.vnode = newAFSFid.Vnode;
+ newFid.unique = newAFSFid.Unique;
+ code = cm_GetSCache(&newFid, &scp, userp, reqp);
+ if (code == 0) {
+ lock_ObtainMutex(&scp->mx);
+ if (!cm_HaveCallback(scp)) {
+ cm_MergeStatus(scp, &newDirStatus, &volSync,
+ userp, 0);
+ cm_EndCallbackGrantingCall(scp, &cbReq,
+ &newDirCallback, 0);
+ didEnd = 1;
+ }
+ lock_ReleaseMutex(&scp->mx);
+ cm_ReleaseSCache(scp);
}
-
- /* make sure we end things properly */
- if (!didEnd)
- cm_EndCallbackGrantingCall(NULL, NULL, NULL, 0);
-
- /* and return error code */
+ }
+
+ /* make sure we end things properly */
+ if (!didEnd)
+ cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
+
+ /* and return error code */
+ return code;
+}
+
+long cm_Link(cm_scache_t *dscp, char *namep, cm_scache_t *sscp, long flags,
+ cm_user_t *userp, cm_req_t *reqp)
+{
+ cm_conn_t *connp;
+ long code = 0;
+ AFSFid dirAFSFid;
+ AFSFid existingAFSFid;
+ AFSFetchStatus updatedDirStatus;
+ AFSFetchStatus newLinkStatus;
+ AFSVolSync volSync;
+ struct rx_connection * callp;
+
+ if (dscp->fid.cell != sscp->fid.cell ||
+ dscp->fid.volume != sscp->fid.volume) {
+ return CM_ERROR_CROSSDEVLINK;
+ }
+
+ lock_ObtainMutex(&dscp->mx);
+ code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&dscp->mx);
+
+ if (code)
return code;
+
+ /* try the RPC now */
+ osi_Log1(afsd_logp, "CALL Link scp 0x%p", dscp);
+ do {
+ code = cm_Conn(&dscp->fid, userp, reqp, &connp);
+ if (code) continue;
+
+ dirAFSFid.Volume = dscp->fid.volume;
+ dirAFSFid.Vnode = dscp->fid.vnode;
+ dirAFSFid.Unique = dscp->fid.unique;
+
+ existingAFSFid.Volume = sscp->fid.volume;
+ existingAFSFid.Vnode = sscp->fid.vnode;
+ existingAFSFid.Unique = sscp->fid.unique;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_Link(callp, &dirAFSFid, namep, &existingAFSFid,
+ &newLinkStatus, &updatedDirStatus, &volSync);
+ rx_PutConnection(callp);
+ osi_Log1(smb_logp," RXAFS_Link returns 0x%x", code);
+
+ } while (cm_Analyze(connp, userp, reqp,
+ &dscp->fid, &volSync, NULL, NULL, code));
+
+ code = cm_MapRPCError(code, reqp);
+
+ if (code)
+ osi_Log1(afsd_logp, "CALL Link FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL Link SUCCESS");
+
+ lock_ObtainMutex(&dscp->mx);
+ cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
+ }
+ lock_ReleaseMutex(&dscp->mx);
+
+ return code;
}
long cm_SymLink(cm_scache_t *dscp, char *namep, char *contentsp, long flags,
- cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp)
+ cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp)
{
- cm_conn_t *connp;
- long code;
- AFSFid dirAFSFid;
- AFSFid newAFSFid;
- cm_fid_t newFid;
- cm_scache_t *scp;
- AFSStoreStatus inStatus;
- AFSFetchStatus updatedDirStatus;
- AFSFetchStatus newLinkStatus;
- AFSVolSync volSync;
-
- /* before starting the RPC, mark that we're changing the directory data,
- * so that someone who does a chmod on the dir will wait until our
- * call completes.
- */
- lock_ObtainMutex(&dscp->mx);
- code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
- lock_ReleaseMutex(&dscp->mx);
- if (code) {
- return code;
- }
+ cm_conn_t *connp;
+ long code;
+ AFSFid dirAFSFid;
+ AFSFid newAFSFid;
+ cm_fid_t newFid;
+ cm_scache_t *scp;
+ AFSStoreStatus inStatus;
+ AFSFetchStatus updatedDirStatus;
+ AFSFetchStatus newLinkStatus;
+ AFSVolSync volSync;
+ struct rx_connection * callp;
+
+ /* before starting the RPC, mark that we're changing the directory data,
+ * so that someone who does a chmod on the dir will wait until our
+ * call completes.
+ */
+ lock_ObtainMutex(&dscp->mx);
+ code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&dscp->mx);
+ if (code) {
+ return code;
+ }
- cm_StatusFromAttr(&inStatus, NULL, attrp);
+ cm_StatusFromAttr(&inStatus, NULL, attrp);
- /* try the RPC now */
- do {
- code = cm_Conn(&dscp->fid, userp, reqp, &connp);
- if (code) continue;
-
- dirAFSFid.Volume = dscp->fid.volume;
- dirAFSFid.Vnode = dscp->fid.vnode;
- dirAFSFid.Unique = dscp->fid.unique;
- code = RXAFS_Symlink(connp->callp, &dirAFSFid, namep, contentsp,
- &inStatus, &newAFSFid, &newLinkStatus,
- &updatedDirStatus, &volSync);
- } while (cm_Analyze(connp, userp, reqp,
- &dscp->fid, &volSync, NULL, code));
- code = cm_MapRPCError(code, reqp);
+ /* try the RPC now */
+ osi_Log1(afsd_logp, "CALL Symlink scp 0x%p", dscp);
+ do {
+ code = cm_Conn(&dscp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ dirAFSFid.Volume = dscp->fid.volume;
+ dirAFSFid.Vnode = dscp->fid.vnode;
+ dirAFSFid.Unique = dscp->fid.unique;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_Symlink(callp, &dirAFSFid, namep, contentsp,
+ &inStatus, &newAFSFid, &newLinkStatus,
+ &updatedDirStatus, &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp,
+ &dscp->fid, &volSync, NULL, NULL, code));
+ code = cm_MapRPCError(code, reqp);
- lock_ObtainMutex(&dscp->mx);
- cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
- }
- lock_ReleaseMutex(&dscp->mx);
+ if (code)
+ osi_Log1(afsd_logp, "CALL Symlink FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL Symlink SUCCESS");
+
+ lock_ObtainMutex(&dscp->mx);
+ cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
+ }
+ lock_ReleaseMutex(&dscp->mx);
- /* now try to create the new dir's entry, too, but be careful to
- * make sure that we don't merge in old info. Since we weren't locking
- * out any requests during the file's creation, we may have pretty old
- * info.
- */
- if (code == 0) {
- newFid.cell = dscp->fid.cell;
- newFid.volume = dscp->fid.volume;
- newFid.vnode = newAFSFid.Vnode;
- newFid.unique = newAFSFid.Unique;
- code = cm_GetSCache(&newFid, &scp, userp, reqp);
- if (code == 0) {
- lock_ObtainMutex(&scp->mx);
- if (!cm_HaveCallback(scp)) {
- cm_MergeStatus(scp, &newLinkStatus, &volSync,
- userp, 0);
- }
- lock_ReleaseMutex(&scp->mx);
- cm_ReleaseSCache(scp);
- }
+ /* now try to create the new dir's entry, too, but be careful to
+ * make sure that we don't merge in old info. Since we weren't locking
+ * out any requests during the file's creation, we may have pretty old
+ * info.
+ */
+ if (code == 0) {
+ newFid.cell = dscp->fid.cell;
+ newFid.volume = dscp->fid.volume;
+ newFid.vnode = newAFSFid.Vnode;
+ newFid.unique = newAFSFid.Unique;
+ code = cm_GetSCache(&newFid, &scp, userp, reqp);
+ if (code == 0) {
+ lock_ObtainMutex(&scp->mx);
+ if (!cm_HaveCallback(scp)) {
+ cm_MergeStatus(scp, &newLinkStatus, &volSync,
+ userp, 0);
+ }
+ lock_ReleaseMutex(&scp->mx);
+ cm_ReleaseSCache(scp);
}
+ }
- /* and return error code */
- return code;
+ /* and return error code */
+ return code;
}
long cm_RemoveDir(cm_scache_t *dscp, char *namep, cm_user_t *userp,
- cm_req_t *reqp)
+ cm_req_t *reqp)
{
- cm_conn_t *connp;
- long code;
- AFSFid dirAFSFid;
- int didEnd;
- AFSFetchStatus updatedDirStatus;
- AFSVolSync volSync;
-
- /* before starting the RPC, mark that we're changing the directory data,
- * so that someone who does a chmod on the dir will wait until our
- * call completes.
- */
- lock_ObtainMutex(&dscp->mx);
- code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
- lock_ReleaseMutex(&dscp->mx);
- if (code) {
- return code;
- }
- didEnd = 0;
+ cm_conn_t *connp;
+ long code;
+ AFSFid dirAFSFid;
+ int didEnd;
+ AFSFetchStatus updatedDirStatus;
+ AFSVolSync volSync;
+ struct rx_connection * callp;
+
+ /* before starting the RPC, mark that we're changing the directory data,
+ * so that someone who does a chmod on the dir will wait until our
+ * call completes.
+ */
+ lock_ObtainMutex(&dscp->mx);
+ code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&dscp->mx);
+ if (code) {
+ return code;
+ }
+ didEnd = 0;
- /* try the RPC now */
- do {
- code = cm_Conn(&dscp->fid, userp, reqp, &connp);
- if (code) continue;
-
- dirAFSFid.Volume = dscp->fid.volume;
- dirAFSFid.Vnode = dscp->fid.vnode;
- dirAFSFid.Unique = dscp->fid.unique;
- code = RXAFS_RemoveDir(connp->callp, &dirAFSFid, namep,
- &updatedDirStatus, &volSync);
- } while (cm_Analyze(connp, userp, reqp,
- &dscp->fid, &volSync, NULL, code));
- code = cm_MapRPCErrorRmdir(code, reqp);
-
- lock_ObtainMutex(&dscp->mx);
- cm_dnlcRemove(dscp, namep);
- cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
- }
- lock_ReleaseMutex(&dscp->mx);
+ /* try the RPC now */
+ osi_Log1(afsd_logp, "CALL RemoveDir scp 0x%p", dscp);
+ do {
+ code = cm_Conn(&dscp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ dirAFSFid.Volume = dscp->fid.volume;
+ dirAFSFid.Vnode = dscp->fid.vnode;
+ dirAFSFid.Unique = dscp->fid.unique;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_RemoveDir(callp, &dirAFSFid, namep,
+ &updatedDirStatus, &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp,
+ &dscp->fid, &volSync, NULL, NULL, code));
+ code = cm_MapRPCErrorRmdir(code, reqp);
+
+ if (code)
+ osi_Log1(afsd_logp, "CALL RemoveDir FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL RemoveDir SUCCESS");
+
+ lock_ObtainMutex(&dscp->mx);
+ cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_dnlcRemove(dscp, namep);
+ cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
+ }
+ lock_ReleaseMutex(&dscp->mx);
- /* and return error code */
- return code;
+ /* and return error code */
+ return code;
}
long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
{
- /* grab mutex on contents */
- lock_ObtainMutex(&scp->mx);
+ /* grab mutex on contents */
+ lock_ObtainMutex(&scp->mx);
- /* reset the prefetch info */
- scp->prefetch.base.LowPart = 0; /* base */
- scp->prefetch.base.HighPart = 0;
- scp->prefetch.end.LowPart = 0; /* and end */
- scp->prefetch.end.HighPart = 0;
-
- /* release mutex on contents */
- lock_ReleaseMutex(&scp->mx);
-
- /* we're done */
- return 0;
-}
+ /* reset the prefetch info */
+ scp->prefetch.base.LowPart = 0; /* base */
+ scp->prefetch.base.HighPart = 0;
+ scp->prefetch.end.LowPart = 0; /* and end */
+ scp->prefetch.end.HighPart = 0;
+
+ /* release mutex on contents */
+ lock_ReleaseMutex(&scp->mx);
+
+ /* we're done */
+ return 0;
+}
long cm_Rename(cm_scache_t *oldDscp, char *oldNamep, cm_scache_t *newDscp,
- char *newNamep, cm_user_t *userp, cm_req_t *reqp)
+ char *newNamep, cm_user_t *userp, cm_req_t *reqp)
{
- cm_conn_t *connp;
- long code;
- AFSFid oldDirAFSFid;
- AFSFid newDirAFSFid;
- int didEnd;
- AFSFetchStatus updatedOldDirStatus;
- AFSFetchStatus updatedNewDirStatus;
- AFSVolSync volSync;
- int oneDir;
-
- /* before starting the RPC, mark that we're changing the directory data,
- * so that someone who does a chmod on the dir will wait until our call
- * completes. We do this in vnode order so that we don't deadlock,
- * which makes the code a little verbose.
+ cm_conn_t *connp;
+ long code;
+ AFSFid oldDirAFSFid;
+ AFSFid newDirAFSFid;
+ int didEnd;
+ AFSFetchStatus updatedOldDirStatus;
+ AFSFetchStatus updatedNewDirStatus;
+ AFSVolSync volSync;
+ int oneDir;
+ struct rx_connection * callp;
+
+ /* before starting the RPC, mark that we're changing the directory data,
+ * so that someone who does a chmod on the dir will wait until our call
+ * completes. We do this in vnode order so that we don't deadlock,
+ * which makes the code a little verbose.
+ */
+ if (oldDscp == newDscp) {
+ /* check for identical names */
+ if (strcmp(oldNamep, newNamep) == 0)
+ return CM_ERROR_RENAME_IDENTICAL;
+
+ oneDir = 1;
+ lock_ObtainMutex(&oldDscp->mx);
+ cm_dnlcRemove(oldDscp, oldNamep);
+ cm_dnlcRemove(oldDscp, newNamep);
+ code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
+ CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&oldDscp->mx);
+ }
+ else {
+ /* two distinct dir vnodes */
+ oneDir = 0;
+ if (oldDscp->fid.cell != newDscp->fid.cell ||
+ oldDscp->fid.volume != newDscp->fid.volume)
+ return CM_ERROR_CROSSDEVLINK;
+
+ /* shouldn't happen that we have distinct vnodes for two
+ * different files, but could due to deliberate attack, or
+ * stale info. Avoid deadlocks and quit now.
*/
- if (oldDscp == newDscp) {
- /* check for identical names */
- if (strcmp(oldNamep, newNamep) == 0)
- return CM_ERROR_RENAME_IDENTICAL;
-
- oneDir = 1;
- lock_ObtainMutex(&oldDscp->mx);
- cm_dnlcRemove(oldDscp, oldNamep);
- cm_dnlcRemove(oldDscp, newNamep);
- code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
- CM_SCACHESYNC_STOREDATA);
- lock_ReleaseMutex(&oldDscp->mx);
+ if (oldDscp->fid.vnode == newDscp->fid.vnode)
+ return CM_ERROR_CROSSDEVLINK;
+
+ if (oldDscp->fid.vnode < newDscp->fid.vnode) {
+ lock_ObtainMutex(&oldDscp->mx);
+ cm_dnlcRemove(oldDscp, oldNamep);
+ code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
+ CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&oldDscp->mx);
+ if (code == 0) {
+ lock_ObtainMutex(&newDscp->mx);
+ cm_dnlcRemove(newDscp, newNamep);
+ code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
+ CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&newDscp->mx);
+ if (code) {
+ /* cleanup first one */
+ lock_ObtainMutex(&oldDscp->mx);
+ cm_SyncOpDone(oldDscp, NULL,
+ CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&oldDscp->mx);
+ }
+ }
}
else {
- /* two distinct dir vnodes */
- oneDir = 0;
- if (oldDscp->fid.cell != newDscp->fid.cell ||
- oldDscp->fid.volume != newDscp->fid.volume)
- return CM_ERROR_CROSSDEVLINK;
-
- /* shouldn't happen that we have distinct vnodes for two
- * different files, but could due to deliberate attack, or
- * stale info. Avoid deadlocks and quit now.
- */
- if (oldDscp->fid.vnode == newDscp->fid.vnode)
- return CM_ERROR_CROSSDEVLINK;
-
- if (oldDscp->fid.vnode < newDscp->fid.vnode) {
- lock_ObtainMutex(&oldDscp->mx);
- cm_dnlcRemove(oldDscp, oldNamep);
- code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
- CM_SCACHESYNC_STOREDATA);
- lock_ReleaseMutex(&oldDscp->mx);
- if (code == 0) {
- lock_ObtainMutex(&newDscp->mx);
- cm_dnlcRemove(newDscp, newNamep);
- code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
- CM_SCACHESYNC_STOREDATA);
- lock_ReleaseMutex(&newDscp->mx);
- if (code) {
- /* cleanup first one */
- cm_SyncOpDone(oldDscp, NULL,
- CM_SCACHESYNC_STOREDATA);
- }
- }
- }
- else {
- /* lock the new vnode entry first */
- lock_ObtainMutex(&newDscp->mx);
- cm_dnlcRemove(newDscp, newNamep);
- code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
- CM_SCACHESYNC_STOREDATA);
- lock_ReleaseMutex(&newDscp->mx);
- if (code == 0) {
- lock_ObtainMutex(&oldDscp->mx);
- cm_dnlcRemove(oldDscp, oldNamep);
- code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
- CM_SCACHESYNC_STOREDATA);
- lock_ReleaseMutex(&oldDscp->mx);
- if (code) {
- /* cleanup first one */
- cm_SyncOpDone(newDscp, NULL,
- CM_SCACHESYNC_STOREDATA);
- }
- }
- }
- } /* two distinct vnodes */
+ /* lock the new vnode entry first */
+ lock_ObtainMutex(&newDscp->mx);
+ cm_dnlcRemove(newDscp, newNamep);
+ code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
+ CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&newDscp->mx);
+ if (code == 0) {
+ lock_ObtainMutex(&oldDscp->mx);
+ cm_dnlcRemove(oldDscp, oldNamep);
+ code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
+ CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&oldDscp->mx);
+ if (code) {
+ /* cleanup first one */
+ lock_ObtainMutex(&newDscp->mx);
+ cm_SyncOpDone(newDscp, NULL,
+ CM_SCACHESYNC_STOREDATA);
+ lock_ReleaseMutex(&newDscp->mx);
+ }
+ }
+ }
+ } /* two distinct vnodes */
- if (code) {
- return code;
- }
- didEnd = 0;
+ if (code) {
+ return code;
+ }
+ didEnd = 0;
- /* try the RPC now */
- do {
- code = cm_Conn(&oldDscp->fid, userp, reqp, &connp);
- if (code) continue;
-
- oldDirAFSFid.Volume = oldDscp->fid.volume;
- oldDirAFSFid.Vnode = oldDscp->fid.vnode;
- oldDirAFSFid.Unique = oldDscp->fid.unique;
- newDirAFSFid.Volume = newDscp->fid.volume;
- newDirAFSFid.Vnode = newDscp->fid.vnode;
- newDirAFSFid.Unique = newDscp->fid.unique;
- code = RXAFS_Rename(connp->callp, &oldDirAFSFid, oldNamep,
- &newDirAFSFid, newNamep,
- &updatedOldDirStatus, &updatedNewDirStatus,
- &volSync);
- } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid,
- &volSync, NULL, code));
- code = cm_MapRPCError(code, reqp);
+ /* try the RPC now */
+ osi_Log2(afsd_logp, "CALL Rename old scp 0x%p new scp 0x%p",
+ oldDscp, newDscp);
+ do {
+ code = cm_Conn(&oldDscp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ oldDirAFSFid.Volume = oldDscp->fid.volume;
+ oldDirAFSFid.Vnode = oldDscp->fid.vnode;
+ oldDirAFSFid.Unique = oldDscp->fid.unique;
+ newDirAFSFid.Volume = newDscp->fid.volume;
+ newDirAFSFid.Vnode = newDscp->fid.vnode;
+ newDirAFSFid.Unique = newDscp->fid.unique;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_Rename(callp, &oldDirAFSFid, oldNamep,
+ &newDirAFSFid, newNamep,
+ &updatedOldDirStatus, &updatedNewDirStatus,
+ &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid,
+ &volSync, NULL, NULL, code));
+ code = cm_MapRPCError(code, reqp);
- /* update the individual stat cache entries for the directories */
- lock_ObtainMutex(&oldDscp->mx);
- cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_MergeStatus(oldDscp, &updatedOldDirStatus, &volSync,
- userp, 0);
- }
- lock_ReleaseMutex(&oldDscp->mx);
-
- /* and update it for the new one, too, if necessary */
- if (!oneDir) {
- lock_ObtainMutex(&newDscp->mx);
- cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
- if (code == 0) {
- cm_MergeStatus(newDscp, &updatedNewDirStatus, &volSync,
- userp, 0);
- }
- lock_ReleaseMutex(&newDscp->mx);
- }
+ if (code)
+ osi_Log1(afsd_logp, "CALL Rename FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp, "CALL Rename SUCCESS");
+
+ /* update the individual stat cache entries for the directories */
+ lock_ObtainMutex(&oldDscp->mx);
+ cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_MergeStatus(oldDscp, &updatedOldDirStatus, &volSync,
+ userp, 0);
+ }
+ lock_ReleaseMutex(&oldDscp->mx);
- /* and return error code */
- return code;
+ /* and update it for the new one, too, if necessary */
+ if (!oneDir) {
+ lock_ObtainMutex(&newDscp->mx);
+ cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
+ if (code == 0) {
+ cm_MergeStatus(newDscp, &updatedNewDirStatus, &volSync,
+ userp, 0);
+ }
+ lock_ReleaseMutex(&newDscp->mx);
+ }
+
+ /* and return error code */
+ return code;
+}
+
+/* Byte range locks:
+
+ The OpenAFS Windows client has to fake byte range locks given no
+ server side support for such locks. This is implemented as keyed
+ byte range locks on the cache manager.
+
+ Keyed byte range locks:
+
+ Each cm_scache_t structure keeps track of a list of keyed locks.
+ The key for a lock identifies an owner of a set of locks (referred
+ to as a client). Each key is represented by a value. The set of
+ key values used within a specific cm_scache_t structure form a
+ namespace that has a scope of just that cm_scache_t structure. The
+ same key value can be used with another cm_scache_t structure and
+ correspond to a completely different client. However it is
+ advantageous for the SMB or IFS layer to make sure that there is a
+ 1-1 mapping between client and keys over all cm_scache_t objects.
+
+ Assume a client C has key Key(C) (although, since the scope of the
+ key is a cm_scache_t, the key can be Key(C,S), where S is the
+ cm_scache_t. But assume a 1-1 relation between keys and clients).
+ A byte range (O,+L) denotes byte addresses (O) through (O+L-1)
+ inclusive (a.k.a. [O,O+L-1]). The function Key(x) is implemented
+ through cm_generateKey() function for both SMB and IFS.
+
+ The list of locks for a cm_scache_t object S is maintained in
+ S->fileLocks. The cache manager will set a lock on the AFS file
+ server in order to assert the locks in S->fileLocks. If only
+ shared locks are in place for S, then the cache manager will obtain
+ a LockRead lock, while if there are any exclusive locks, it will
+ obtain a LockWrite lock. If the exclusive locks are all released
+ while the shared locks remain, then the cache manager will
+ downgrade the lock from LockWrite to LockRead. Similarly, if an
+ exclusive lock is obtained when only shared locks exist, then the
+ cache manager will try to upgrade the lock from LockRead to
+ LockWrite.
+
+ Each lock L owned by client C maintains a key L->key such that
+ L->key == Key(C), the effective range defined by L->LOffset and
+ L->LLength such that the range of bytes affected by the lock is
+ (L->LOffset, +L->LLength), a type maintained in L->LockType which
+ is either exclusive or shared.
+
+ Lock states:
+
+ A lock exists iff it is in S->fileLocks for some cm_scache_t
+ S. Existing locks are in one of the following states: ACTIVE,
+ WAITLOCK, WAITUNLOCK, LOST, DELETED.
+
+ The following sections describe each lock and the associated
+ transitions.
+
+ 1. ACTIVE: A lock L is ACTIVE iff the cache manager has asserted
+ the lock with the AFS file server. This type of lock can be
+ exercised by a client to read or write to the locked region (as
+ the lock allows).
+
+ 1.1 ACTIVE->LOST: When the AFS file server fails to extend a
+ server lock that was required to assert the lock. Before
+ marking the lock as lost, the cache manager checks if the file
+ has changed on the server. If the file has not changed, then
+ the cache manager will attempt to obtain a new server lock
+ that is sufficient to assert the client side locks for the
+ file. If any of these fail, the lock is marked as LOST.
+ Otherwise, it is left as ACTIVE.
+
+ 1.2 ACTIVE->DELETED: Lock is released.
+
+ 2. WAITLOCK: A lock is in a WAITLOCK state if the cache manager
+ grants the lock but the lock is yet to be asserted with the AFS
+ file server. Once the file server grants the lock, the state
+ will transition to an ACTIVE lock.
+
+ 2.1 WAITLOCK->ACTIVE: The server granted the lock.
+
+ 2.2 WAITLOCK->DELETED: Lock is abandoned, or timed out during
+ waiting.
+
+ 2.3 WAITLOCK->LOST: One or more locks from this client were
+ marked as LOST. No further locks will be granted to this
+ client until all lost locks are removed.
+
+ 3. WAITUNLOCK: A lock is in a WAITUNLOCK state if the cache manager
+ receives a request for a lock that conflicts with an existing
+ ACTIVE or WAITLOCK lock. The lock will be placed in the queue
+ and will be granted at such time the conflicting locks are
+ removed, at which point the state will transition to either
+ WAITLOCK or ACTIVE.
+
+ 3.1 WAITUNLOCK->ACTIVE: The conflicting lock was removed. The
+ current serverLock is sufficient to assert this lock, or a
+ sufficient serverLock is obtained.
+
+ 3.2 WAITUNLOCK->WAITLOCK: The conflicting lock was removed,
+ however the required serverLock is yet to be asserted with the
+ server.
+
+ 3.3 WAITUNLOCK->DELETED: The lock is abandoned, timed out or
+ released.
+
+ 3.5 WAITUNLOCK->LOST: One or more locks from this client were
+ marked as LOST. No further locks will be granted to this
+ client until all lost locks are removed.
+
+ 4. LOST: A lock L is LOST if the server lock that was required to
+ assert the lock could not be obtained or if it could not be
+ extended, or if other locks by the same client were LOST.
+ Essentially, once a lock is LOST, the contract between the cache
+ manager and that specific client is no longer valid.
+
+ The cache manager rechecks the server lock once every minute and
+ extends it as appropriate. If this is not done for 5 minutes,
+ the AFS file server will release the lock (the 5 minute timeout
+ is based on current file server code and is fairly arbitrary).
+ Once released, the lock cannot be re-obtained without verifying
+ that the contents of the file hasn't been modified since the
+ time the lock was released. Re-obtaining the lock without
+ verifying this may lead to data corruption. If the lock can not
+ be obtained safely, then all active locks for the cm_scache_t
+ are marked as LOST.
+
+ 4.1 LOST->DELETED: The lock is released.
+
+ 5. DELETED: The lock is no longer relevant. Eventually, it will
+ get removed from the cm_scache_t. In the meantime, it will be
+ treated as if it does not exist.
+
+ 5.1 DELETED->not exist: The lock is removed from the
+ cm_scache_t.
+
+ The following are classifications of locks based on their state.
+
+ 6* A lock L is ACCEPTED if it is ACTIVE or WAITLOCK. These locks
+ have been accepted by the cache manager, but may or may not have
+ been granted back to the client.
+
+ 7* A lock L is QUEUED if it is ACTIVE, WAITLOCK or WAITUNLOCK.
+
+ 8* A lock L is WAITING if it is WAITLOCK or WAITUNLOCK.
+
+ Lock operation:
+
+ A client C can READ range (Offset,+Length) of a file represented by
+ cm_scache_t S iff (1):
+
+ 1. for all _a_ in (Offset,+Length), all of the following is true:
+
+ 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
+ (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
+ shared.
+
+ 1.2 For each LOST lock L in S->fileLocks such that _a_ in
+ (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
+ Key(C)
+
+ (When locks are lost on an cm_scache_t, all locks are lost. By
+ 4.2 (below), if there is an exclusive LOST lock, then there
+ can't be any overlapping ACTIVE locks.)
+
+ A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
+
+ 2. for all _a_ in (Offset,+Length), one of the following is true:
+
+ 2.1 Byte _a_ of S is unowned (as specified in 1.1) AND there
+ does not exist a LOST lock L such that _a_ in
+ (L->LOffset,+L->LLength).
+
+ 2.2 Byte _a_ of S is owned by C under lock L (as specified in
+ 1.2) AND L->LockType is exclusive.
+
+ A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
+
+ 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
+ true:
+
+ 3.1 If L->LockType is exclusive then there does NOT exist a
+ ACCEPTED lock M in S->fileLocks such that _a_ in
+ (M->LOffset,+M->LLength).
+
+ (If we count all QUEUED locks then we hit cases such as
+ cascading waiting locks where the locks later on in the queue
+ can be granted without compromising file integrity. On the
+ other hand if only ACCEPTED locks are considered, then locks
+ that were received earlier may end up waiting for locks that
+ were received later to be unlocked. The choice of ACCEPTED
+ locks was made to mimic the Windows byte range lock
+ semantics.)
+
+ 3.2 If L->LockType is shared then for each ACCEPTED lock M in
+ S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
+ M->LockType is shared.
+
+ 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
+
+ 4.1 M->key != Key(C)
+
+ 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
+ and (M->LOffset,+M->LLength) do not intersect.
+
+ (Note: If a client loses a lock, it loses all locks.
+ Subsequently, it will not be allowed to obtain any more locks
+ until all existing LOST locks that belong to the client are
+ released. Once all locks are released by a single client,
+ there exists no further contract between the client and AFS
+ about the contents of the file, hence the client can then
+ proceed to obtain new locks and establish a new contract.
+
+ This doesn't quite work as you think it should, because most
+ applications aren't built to deal with losing locks they
+ thought they once had. For now, we don't have a good
+ solution to lost locks.
+
+ Also, for consistency reasons, we have to hold off on
+ granting locks that overlap exclusive LOST locks.)
+
+ A client C can only unlock locks L in S->fileLocks which have
+ L->key == Key(C).
+
+ The representation and invariants are as follows:
+
+ - Each cm_scache_t structure keeps:
+
+ - A queue of byte-range locks (cm_scache_t::fileLocks) which
+ are of type cm_file_lock_t.
+
+ - A record of the highest server-side lock that has been
+ obtained for this object (cm_scache_t::serverLock), which is
+ one of (-1), LockRead, LockWrite.
+
+ - A count of ACCEPTED exclusive and shared locks that are in the
+ queue (cm_scache_t::sharedLocks and
+ cm_scache_t::exclusiveLocks)
+
+ - Each cm_file_lock_t structure keeps:
+
+ - The type of lock (cm_file_lock_t::LockType)
+
+ - The key associated with the lock (cm_file_lock_t::key)
+
+ - The offset and length of the lock (cm_file_lock_t::LOffset
+ and cm_file_lock_t::LLength)
+
+ - The state of the lock.
+
+ - Time of issuance or last successful extension
+
+ Semantic invariants:
+
+ I1. The number of ACCEPTED locks in S->fileLocks are
+ (S->sharedLocks + S->exclusiveLocks)
+
+ External invariants:
+
+ I3. S->serverLock is the lock that we have asserted with the
+ AFS file server for this cm_scache_t.
+
+ I4. S->serverLock == LockRead iff there is at least one ACTIVE
+ shared lock, but no ACTIVE exclusive locks.
+
+ I5. S->serverLock == LockWrite iff there is at least one ACTIVE
+ exclusive lock.
+
+ I6. If L is a LOST lock, then for each lock M in S->fileLocks,
+ M->key == L->key IMPLIES M is LOST or DELETED.
+
+ --asanka
+ */
+
+#define IS_LOCK_ACTIVE(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == 0)
+
+#define IS_LOCK_WAITLOCK(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_WAITLOCK)
+
+#define IS_LOCK_WAITUNLOCK(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_WAITUNLOCK)
+
+#define IS_LOCK_LOST(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_LOST)
+
+#define IS_LOCK_DELETED(lockp) (((lockp)->flags & CM_FILELOCK_FLAG_DELETED) == CM_FILELOCK_FLAG_DELETED)
+
+/* unsafe */
+#define IS_LOCK_ACCEPTED(lockp) (IS_LOCK_ACTIVE(lockp) || IS_LOCK_WAITLOCK(lockp))
+
+/* unsafe */
+#define IS_LOCK_CLIENTONLY(lockp) ((((lockp)->scp->flags & CM_SCACHEFLAG_RO) == CM_SCACHEFLAG_RO) || (((lockp)->flags & CM_FILELOCK_FLAG_CLIENTONLY) == CM_FILELOCK_FLAG_CLIENTONLY))
+
+/* unsafe */
+#define INTERSECT_RANGE(r1,r2) (((r2).offset+(r2).length) > (r1).offset && ((r1).offset +(r1).length) > (r2).offset)
+
+/* unsafe */
+#define CONTAINS_RANGE(r1,r2) (((r2).offset+(r2).length) <= ((r1).offset+(r1).length) && (r1).offset <= (r2).offset)
+
+#if defined(VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS) && !defined(LOCK_TESTING)
+#define SCP_SUPPORTS_BRLOCKS(scp) ((scp)->cbServerp && ((scp)->cbServerp->capabilities & VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS))
+#else
+#define SCP_SUPPORTS_BRLOCKS(scp) (1)
+#endif
+
+#define SERVERLOCKS_ENABLED(scp) (!((scp)->flags & CM_SCACHEFLAG_RO) && cm_enableServerLocks && SCP_SUPPORTS_BRLOCKS(scp))
+
+static void cm_LockRangeSubtract(cm_range_t * pos, const cm_range_t * neg)
+{
+ afs_int64 int_begin;
+ afs_int64 int_end;
+
+ int_begin = MAX(pos->offset, neg->offset);
+ int_end = MIN(pos->offset+pos->length, neg->offset+neg->length);
+
+ if (int_begin < int_end) {
+ if (int_begin == pos->offset) {
+ pos->length = pos->offset + pos->length - int_end;
+ pos->offset = int_end;
+ } else if (int_end == pos->offset + pos->length) {
+ pos->length = int_begin - pos->offset;
+ }
+
+ /* We only subtract ranges if the resulting range is
+ contiguous. If we try to support non-contigous ranges, we
+ aren't actually improving performance. */
+ }
+}
+
+/* Called with scp->mx held. Returns 0 if all is clear to read the
+ specified range by the client identified by key.
+ */
+long cm_LockCheckRead(cm_scache_t *scp,
+ LARGE_INTEGER LOffset,
+ LARGE_INTEGER LLength,
+ cm_key_t key)
+{
+#ifndef ADVISORY_LOCKS
+
+ cm_file_lock_t *fileLock;
+ osi_queue_t *q;
+ long code = 0;
+ cm_range_t range;
+ int substract_ranges = FALSE;
+
+ range.offset = LOffset.QuadPart;
+ range.length = LLength.QuadPart;
+
+ /*
+
+ 1. for all _a_ in (Offset,+Length), all of the following is true:
+
+ 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
+ (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
+ shared.
+
+ 1.2 For each LOST lock L in S->fileLocks such that _a_ in
+ (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
+ Key(C)
+
+ */
+
+ lock_ObtainRead(&cm_scacheLock);
+
+ for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
+ fileLock =
+ (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
+
+ if (INTERSECT_RANGE(range, fileLock->range)) {
+ if (IS_LOCK_ACTIVE(fileLock)) {
+ if (fileLock->key == key) {
+
+ /* If there is an active lock for this client, it
+ is safe to substract ranges.*/
+ cm_LockRangeSubtract(&range, &fileLock->range);
+ substract_ranges = TRUE;
+ } else {
+ if (fileLock->lockType != LockRead) {
+ code = CM_ERROR_LOCK_CONFLICT;
+ break;
+ }
+
+ /* even if the entire range is locked for reading,
+ we still can't grant the lock at this point
+ because the client may have lost locks. That
+ is, unless we have already seen an active lock
+ belonging to the client, in which case there
+ can't be any lost locks for this client. */
+ if (substract_ranges)
+ cm_LockRangeSubtract(&range, &fileLock->range);
+ }
+ } else if (IS_LOCK_LOST(fileLock) &&
+ (fileLock->key == key || fileLock->lockType == LockWrite)) {
+ code = CM_ERROR_BADFD;
+ break;
+ }
+ }
+ }
+
+ lock_ReleaseRead(&cm_scacheLock);
+
+ osi_Log4(afsd_logp, "cm_LockCheckRead scp 0x%x offset %d length %d code 0x%x",
+ scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
+
+ return code;
+
+#else
+
+ return 0;
+
+#endif
+}
+
+/* Called with scp->mx held. Returns 0 if all is clear to write the
+ specified range by the client identified by key.
+ */
+long cm_LockCheckWrite(cm_scache_t *scp,
+ LARGE_INTEGER LOffset,
+ LARGE_INTEGER LLength,
+ cm_key_t key)
+{
+#ifndef ADVISORY_LOCKS
+
+ cm_file_lock_t *fileLock;
+ osi_queue_t *q;
+ long code = 0;
+ cm_range_t range;
+
+ range.offset = LOffset.QuadPart;
+ range.length = LLength.QuadPart;
+
+ /*
+ A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
+
+ 2. for all _a_ in (Offset,+Length), one of the following is true:
+
+ 2.1 Byte _a_ of S is unowned AND there does not exist a LOST
+ lock L such that _a_ in (L->LOffset,+L->LLength).
+
+ 2.2 Byte _a_ of S is owned by C under lock L AND L->LockType is
+ exclusive.
+ */
+
+ lock_ObtainRead(&cm_scacheLock);
+
+ for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
+ fileLock =
+ (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
+
+ if (INTERSECT_RANGE(range, fileLock->range)) {
+ if (IS_LOCK_ACTIVE(fileLock)) {
+ if (fileLock->key == key) {
+ if (fileLock->lockType == LockWrite) {
+
+ /* if there is an active lock for this client, it
+ is safe to substract ranges */
+ cm_LockRangeSubtract(&range, &fileLock->range);
+ } else {
+ code = CM_ERROR_LOCK_CONFLICT;
+ break;
+ }
+ } else {
+ code = CM_ERROR_LOCK_CONFLICT;
+ break;
+ }
+ } else if (IS_LOCK_LOST(fileLock)) {
+ code = CM_ERROR_BADFD;
+ break;
+ }
+ }
+ }
+
+ lock_ReleaseRead(&cm_scacheLock);
+
+ osi_Log4(afsd_logp, "cm_LockCheckWrite scp 0x%x offset %d length %d code 0x%x",
+ scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
+
+ return code;
+
+#else
+
+ return 0;
+
+#endif
+}
+
+/* Forward dcl. */
+static void cm_LockMarkSCacheLost(cm_scache_t * scp);
+
+/* Called with cm_scacheLock write locked */
+static cm_file_lock_t * cm_GetFileLock(void) {
+ cm_file_lock_t * l;
+
+ l = (cm_file_lock_t *) cm_freeFileLocks;
+ if (l) {
+ osi_QRemove(&cm_freeFileLocks, &l->q);
+ } else {
+ l = malloc(sizeof(cm_file_lock_t));
+ osi_assert(l);
+ }
+
+ memset(l, 0, sizeof(cm_file_lock_t));
+
+ return l;
+}
+
+/* Called with cm_scacheLock write locked */
+static void cm_PutFileLock(cm_file_lock_t *l) {
+ osi_QAdd(&cm_freeFileLocks, &l->q);
+}
+
+/* called with scp->mx held. May release it during processing, but
+ leaves it held on exit. */
+long cm_IntSetLock(cm_scache_t * scp, cm_user_t * userp, int lockType,
+ cm_req_t * reqp) {
+ long code = 0;
+ AFSFid tfid;
+ cm_fid_t cfid;
+ cm_conn_t * connp;
+ struct rx_connection * callp;
+ AFSVolSync volSync;
+
+ tfid.Volume = scp->fid.volume;
+ tfid.Vnode = scp->fid.vnode;
+ tfid.Unique = scp->fid.unique;
+ cfid = scp->fid;
+
+ osi_Log2(afsd_logp, "CALL SetLock scp 0x%p for lock %d", scp, lockType);
+
+ lock_ReleaseMutex(&scp->mx);
+
+ do {
+ code = cm_Conn(&cfid, userp, reqp, &connp);
+ if (code)
+ break;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_SetLock(callp, &tfid, lockType,
+ &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
+ NULL, NULL, code));
+
+ code = cm_MapRPCError(code, reqp);
+ if (code) {
+ osi_Log1(afsd_logp, "CALL SetLock FAILURE, code 0x%x", code);
+ } else {
+ osi_Log0(afsd_logp, "CALL SetLock SUCCESS");
+ }
+
+ lock_ObtainMutex(&scp->mx);
+
+ return code;
+}
+
+/* called with scp->mx held. Releases it during processing */
+long cm_IntReleaseLock(cm_scache_t * scp, cm_user_t * userp,
+ cm_req_t * reqp) {
+ long code = 0;
+ AFSFid tfid;
+ cm_fid_t cfid;
+ cm_conn_t * connp;
+ struct rx_connection * callp;
+ AFSVolSync volSync;
+
+ tfid.Volume = scp->fid.volume;
+ tfid.Vnode = scp->fid.vnode;
+ tfid.Unique = scp->fid.unique;
+ cfid = scp->fid;
+
+ lock_ReleaseMutex(&scp->mx);
+
+ osi_Log1(afsd_logp, "CALL ReleaseLock scp 0x%p", scp);
+
+ do {
+ code = cm_Conn(&cfid, userp, reqp, &connp);
+ if (code)
+ break;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_ReleaseLock(callp, &tfid, &volSync);
+ rx_PutConnection(callp);
+
+ } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
+ NULL, NULL, code));
+ code = cm_MapRPCError(code, reqp);
+ if (code)
+ osi_Log1(afsd_logp,
+ "CALL ReleaseLock FAILURE, code 0x%x", code);
+ else
+ osi_Log0(afsd_logp,
+ "CALL ReleaseLock SUCCESS");
+
+ lock_ObtainMutex(&scp->mx);
+
+ return code;
+}
+
+/* called with scp->mx held. May release it during processing, but
+ will exit with lock held.
+
+ This will return:
+
+ - 0 if the user has permission to get the specified lock for the scp
+
+ - CM_ERROR_NOACCESS if not
+
+ Any other error from cm_SyncOp will be sent down untranslated.
+*/
+long cm_LockCheckPerms(cm_scache_t * scp,
+ int lock_type,
+ cm_user_t * userp,
+ cm_req_t * reqp)
+{
+ long rights = 0;
+ long code = 0;
+
+ /* lock permissions are slightly tricky because of the 'i' bit.
+ If the user has PRSFS_LOCK, she can read-lock the file. If the
+ user has PRSFS_WRITE, she can write-lock the file. However, if
+ the user has PRSFS_INSERT, then she can write-lock new files,
+ but not old ones. Since we don't have information about
+ whether a file is new or not, we assume that if the user owns
+ the scp, then she has the permissions that are granted by
+ PRSFS_INSERT. */
+
+ osi_Log3(afsd_logp, "cm_LockCheckPerms for scp[0x%p] type[%d] user[0x%p]",
+ scp, lock_type, userp);
+
+ if (lock_type == LockRead)
+ rights |= PRSFS_LOCK;
+ else if (lock_type == LockWrite)
+ rights |= PRSFS_WRITE | PRSFS_LOCK;
+ else {
+ /* hmmkay */
+ osi_assert(FALSE);
+ return 0;
+ }
+
+ code = cm_SyncOp(scp, NULL, userp, reqp, rights,
+ CM_SCACHESYNC_GETSTATUS |
+ CM_SCACHESYNC_NEEDCALLBACK);
+
+ if (code == CM_ERROR_NOACCESS &&
+ lock_type == LockWrite &&
+ scp->creator == userp) {
+ /* check for PRSFS_INSERT. */
+
+ code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
+ CM_SCACHESYNC_GETSTATUS |
+ CM_SCACHESYNC_NEEDCALLBACK);
+
+ if (code == CM_ERROR_NOACCESS)
+ osi_Log0(afsd_logp, "cm_LockCheckPerms user is creator but has no INSERT bits for scp");
+ }
+
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
+
+ osi_Log1(afsd_logp, "cm_LockCheckPerms returning code %d", code);
+
+ return code;
+}
+
+/* called with scp->mx held */
+long cm_Lock(cm_scache_t *scp, unsigned char sLockType,
+ LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
+ cm_key_t key,
+ int allowWait, cm_user_t *userp, cm_req_t *reqp,
+ cm_file_lock_t **lockpp)
+{
+ long code = 0;
+ int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
+ cm_file_lock_t *fileLock;
+ osi_queue_t *q;
+ cm_range_t range;
+ int wait_unlock = FALSE;
+ int force_client_lock = FALSE;
+
+ osi_Log4(afsd_logp, "cm_Lock scp 0x%x type 0x%x offset %d length %d",
+ scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
+ osi_Log3(afsd_logp, "... allowWait %d key 0x%x:%x", allowWait,
+ (unsigned long)(key >> 32), (unsigned long)(key & 0xffffffff));
+
+ /*
+ A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
+
+ 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
+ true:
+
+ 3.1 If L->LockType is exclusive then there does NOT exist a
+ ACCEPTED lock M in S->fileLocks such that _a_ in
+ (M->LOffset,+M->LLength).
+
+ 3.2 If L->LockType is shared then for each ACCEPTED lock M in
+ S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
+ M->LockType is shared.
+
+ 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
+
+ 4.1 M->key != Key(C)
+
+ 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
+ and (M->LOffset,+M->LLength) do not intersect.
+ */
+
+ range.offset = LOffset.QuadPart;
+ range.length = LLength.QuadPart;
+
+ lock_ObtainRead(&cm_scacheLock);
+
+ for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
+ fileLock =
+ (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
+
+ if (IS_LOCK_LOST(fileLock)) {
+ if (fileLock->key == key) {
+ code = CM_ERROR_BADFD;
+ break;
+ } else if (fileLock->lockType == LockWrite && INTERSECT_RANGE(range, fileLock->range)) {
+ code = CM_ERROR_WOULDBLOCK;
+ wait_unlock = TRUE;
+ break;
+ }
+ }
+
+ /* we don't need to check for deleted locks here since deleted
+ locks are dequeued from scp->fileLocks */
+ if (IS_LOCK_ACCEPTED(fileLock) &&
+ INTERSECT_RANGE(range, fileLock->range)) {
+
+ if ((sLockType & LOCKING_ANDX_SHARED_LOCK) == 0 ||
+ fileLock->lockType != LockRead) {
+ wait_unlock = TRUE;
+ code = CM_ERROR_WOULDBLOCK;
+ break;
+ }
+ }
+ }
+
+ lock_ReleaseRead(&cm_scacheLock);
+
+ if (code == 0 && SERVERLOCKS_ENABLED(scp)) {
+ if (Which == scp->serverLock ||
+ (Which == LockRead && scp->serverLock == LockWrite)) {
+
+ /* we already have the lock we need */
+ osi_Log3(afsd_logp, " we already have the correct lock. exclusives[%d], shared[%d], serverLock[%d]",
+ scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
+
+ code = cm_LockCheckPerms(scp, Which, userp, reqp);
+
+ /* special case: if we don't have permission to read-lock
+ the file, then we force a clientside lock. This is to
+ compensate for applications that obtain a read-lock for
+ reading files off of directories that don't grant
+ read-locks to the user. */
+ if (code == CM_ERROR_NOACCESS && Which == LockRead) {
+ osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
+ force_client_lock = TRUE;
+ }
+
+ } else if ((scp->exclusiveLocks > 0) ||
+ (scp->sharedLocks > 0 && scp->serverLock != LockRead)) {
+
+ /* We are already waiting for some other lock. We should
+ wait for the daemon to catch up instead of generating a
+ flood of SetLock calls. */
+ osi_Log3(afsd_logp, " already waiting for other lock. exclusives[%d], shared[%d], serverLock[%d]",
+ scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
+
+ /* see if we have permission to create the lock in the
+ first place. */
+ code = cm_LockCheckPerms(scp, Which, userp, reqp);
+ if (code == 0)
+ code = CM_ERROR_WOULDBLOCK;
+ else if (code == CM_ERROR_NOACCESS && Which == LockRead) {
+ osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
+ force_client_lock = TRUE;
+ }
+
+ /* leave any other codes as-is */
+
+ } else {
+ int newLock;
+ int check_data_version = FALSE;
+
+ /* first check if we have permission to elevate or obtain
+ the lock. */
+ code = cm_LockCheckPerms(scp, Which, userp, reqp);
+ if (code) {
+ if (code == CM_ERROR_NOACCESS && Which == LockRead) {
+ osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
+ force_client_lock = TRUE;
+ }
+ goto check_code;
+ }
+
+ if (scp->serverLock == LockRead && Which == LockWrite) {
+
+ /* We want to escalate the lock to a LockWrite.
+ Unfortunately that's not really possible without
+ letting go of the current lock. But for now we do
+ it anyway. */
+
+ osi_Log0(afsd_logp,
+ " attempting to UPGRADE from LockRead to LockWrite.");
+ osi_Log1(afsd_logp,
+ " dataVersion on scp: %d", scp->dataVersion);
+
+ /* we assume at this point (because scp->serverLock
+ was valid) that we had a valid server lock. */
+ scp->lockDataVersion = scp->dataVersion;
+ check_data_version = TRUE;
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ if (code) {
+ /* We couldn't release the lock */
+ goto check_code;
+ } else {
+ scp->serverLock = -1;
+ }
+ }
+
+ /* We need to obtain a server lock of type Which in order
+ to assert this file lock */
+#ifndef AGGRESSIVE_LOCKS
+ newLock = Which;
+#else
+ newLock = LockWrite;
+#endif
+ code = cm_IntSetLock(scp, userp, newLock, reqp);
+
+ if (code == CM_ERROR_WOULDBLOCK && newLock != Which) {
+ /* we wanted LockRead. We tried LockWrite. Now try
+ LockRead again */
+ newLock = Which;
+
+ /* am I sane? */
+ osi_assert(newLock == LockRead);
+
+ code = cm_IntSetLock(scp, userp, newLock, reqp);
+ }
+
+ if (code == 0 && check_data_version &&
+ scp->dataVersion != scp->lockDataVersion) {
+ /* We lost a race. Although we successfully obtained
+ a lock, someone modified the file in between. The
+ locks have all been technically lost. */
+
+ osi_Log0(afsd_logp,
+ " Data version mismatch while upgrading lock.");
+ osi_Log2(afsd_logp,
+ " Data versions before=%d, after=%d",
+ scp->lockDataVersion,
+ scp->dataVersion);
+ osi_Log1(afsd_logp,
+ " Releasing stale lock for scp 0x%x", scp);
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ scp->serverLock = -1;
+
+ code = CM_ERROR_INVAL;
+ } else if (code == 0) {
+ scp->serverLock = newLock;
+ scp->lockDataVersion = scp->dataVersion;
+ }
+
+ if (code != 0 &&
+ (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
+ scp->serverLock == -1) {
+ /* Oops. We lost the lock. */
+ cm_LockMarkSCacheLost(scp);
+ }
+ }
+ } else if (code == 0) { /* server locks not enabled */
+ osi_Log0(afsd_logp,
+ " Skipping server lock for scp");
+ }
+
+ check_code:
+
+ if (code != 0 && !force_client_lock) {
+ /* Special case error translations
+
+ Applications don't expect certain errors from a
+ LockFile/UnlockFile call. We need to translate some error
+ code to codes that apps expect and handle. */
+
+ /* We shouldn't actually need to handle this case since we
+ simulate locks for RO scps anyway. */
+ if (code == CM_ERROR_READONLY) {
+ osi_Log0(afsd_logp, " Reinterpreting CM_ERROR_READONLY as CM_ERROR_NOACCESS");
+ code = CM_ERROR_NOACCESS;
+ }
+ }
+
+ if (code == 0 || (code == CM_ERROR_WOULDBLOCK && allowWait) ||
+ force_client_lock) {
+
+ /* clear the error if we are forcing a client lock, so we
+ don't get confused later. */
+ if (force_client_lock && code != CM_ERROR_WOULDBLOCK)
+ code = 0;
+
+ lock_ObtainWrite(&cm_scacheLock);
+ fileLock = cm_GetFileLock();
+ lock_ReleaseWrite(&cm_scacheLock);
+#ifdef DEBUG
+ fileLock->fid = scp->fid;
+#endif
+ fileLock->key = key;
+ fileLock->lockType = Which;
+ cm_HoldUser(userp);
+ fileLock->userp = userp;
+ fileLock->range = range;
+ fileLock->flags = (code == 0 ? 0 :
+ ((wait_unlock)?
+ CM_FILELOCK_FLAG_WAITUNLOCK :
+ CM_FILELOCK_FLAG_WAITLOCK));
+
+ if (force_client_lock || !SERVERLOCKS_ENABLED(scp))
+ fileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
+
+ fileLock->lastUpdate = (code == 0 && !force_client_lock) ? time(NULL) : 0;
+
+ lock_ObtainWrite(&cm_scacheLock);
+ osi_QAddT(&scp->fileLocksH, &scp->fileLocksT, &fileLock->fileq);
+ cm_HoldSCacheNoLock(scp);
+ fileLock->scp = scp;
+ osi_QAdd(&cm_allFileLocks, &fileLock->q);
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ if (code != 0) {
+ *lockpp = fileLock;
+ }
+
+ if (IS_LOCK_CLIENTONLY(fileLock)) {
+ scp->clientLocks++;
+ } else if (IS_LOCK_ACCEPTED(fileLock)) {
+ if (Which == LockRead)
+ scp->sharedLocks++;
+ else
+ scp->exclusiveLocks++;
+ }
+
+ osi_Log3(afsd_logp,
+ "cm_Lock Lock added 0x%p flags 0x%x to scp [0x%p]",
+ fileLock, fileLock->flags, scp);
+ osi_Log4(afsd_logp,
+ " exclusives[%d] shared[%d] client[%d] serverLock[%d]",
+ scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
+ (int)(signed char) scp->serverLock);
+ } else {
+ osi_Log1(afsd_logp,
+ "cm_Lock Rejecting lock (code = 0x%x)", code);
+ }
+
+ return code;
+}
+
+static int cm_KeyEquals(cm_key_t k1, cm_key_t k2, int flags);
+
+/* Called with scp->mx held */
+long cm_UnlockByKey(cm_scache_t * scp,
+ cm_key_t key,
+ int flags,
+ cm_user_t * userp,
+ cm_req_t * reqp)
+{
+ long code = 0;
+ cm_file_lock_t *fileLock;
+ osi_queue_t *q, *qn;
+ int n_unlocks = 0;
+
+ osi_Log4(afsd_logp, "cm_UnlockByKey scp 0x%p key 0x%x:%x flags=0x%x",
+ scp,
+ (unsigned long)(key >> 32),
+ (unsigned long)(key & 0xffffffff),
+ flags);
+
+ lock_ObtainWrite(&cm_scacheLock);
+
+ for (q = scp->fileLocksH; q; q = qn) {
+ qn = osi_QNext(q);
+
+ fileLock = (cm_file_lock_t *)
+ ((char *) q - offsetof(cm_file_lock_t, fileq));
+
+#ifdef DEBUG
+ osi_Log4(afsd_logp, " Checking lock[0x%x] range[%d,+%d] type[%d]",
+ fileLock,
+ (unsigned long) fileLock->range.offset,
+ (unsigned long) fileLock->range.length,
+ fileLock->lockType);
+ osi_Log3(afsd_logp, " key[0x%x:%x] flags[0x%x]",
+ (unsigned long)(fileLock->key >> 32),
+ (unsigned long)(fileLock->key & 0xffffffff),
+ fileLock->flags);
+
+ if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
+ osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
+ osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
+ fileLock->fid.cell,
+ fileLock->fid.volume,
+ fileLock->fid.vnode,
+ fileLock->fid.unique);
+ osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
+ fileLock->scp->fid.cell,
+ fileLock->scp->fid.volume,
+ fileLock->scp->fid.vnode,
+ fileLock->scp->fid.unique);
+ osi_assert(FALSE);
+ }
+#endif
+
+ if (!IS_LOCK_DELETED(fileLock) &&
+ cm_KeyEquals(fileLock->key, key, flags)) {
+ osi_Log3(afsd_logp, "...Unlock range [%d,+%d] type %d",
+ fileLock->range.offset,
+ fileLock->range.length,
+ fileLock->lockType);
+
+ if (scp->fileLocksT == q)
+ scp->fileLocksT = osi_QPrev(q);
+ osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
+
+ if (IS_LOCK_CLIENTONLY(fileLock)) {
+ scp->clientLocks--;
+ } else if (IS_LOCK_ACCEPTED(fileLock)) {
+ if (fileLock->lockType == LockRead)
+ scp->sharedLocks--;
+ else
+ scp->exclusiveLocks--;
+ }
+
+ fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
+
+ cm_ReleaseUser(fileLock->userp);
+ cm_ReleaseSCacheNoLock(scp);
+
+ fileLock->userp = NULL;
+ fileLock->scp = NULL;
+
+ n_unlocks++;
+ }
+ }
+
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ if (n_unlocks == 0) {
+ osi_Log0(afsd_logp, "cm_UnlockByKey no locks found");
+ osi_Log3(afsd_logp, " Leaving scp with exclusives[%d], shared[%d], serverLock[%d]",
+ scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
+
+ return 0;
+ }
+
+ osi_Log1(afsd_logp, "cm_UnlockByKey done with %d locks", n_unlocks);
+
+ osi_assertx(scp->sharedLocks >= 0, "scp->sharedLocks < 0");
+ osi_assertx(scp->exclusiveLocks >= 0, "scp->exclusiveLocks < 0");
+ osi_assertx(scp->clientLocks >= 0, "scp->clientLocks < 0");
+
+ if (!SERVERLOCKS_ENABLED(scp)) {
+ osi_Log0(afsd_logp, " Skipping server lock for scp");
+ goto done;
+ }
+
+ /* Ideally we would go through the rest of the locks to determine
+ * if one or more locks that were formerly in WAITUNLOCK can now
+ * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
+ * scp->sharedLocks accordingly. However, the retrying of locks
+ * in that manner is done cm_RetryLock() manually.
+ */
+
+ if (scp->serverLock == LockWrite &&
+ scp->exclusiveLocks == 0 &&
+ scp->sharedLocks > 0) {
+
+ /* The serverLock should be downgraded to LockRead */
+ osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
+
+ /* since scp->serverLock looked sane, we are going to assume
+ that we have a valid server lock. */
+ scp->lockDataVersion = scp->dataVersion;
+ osi_Log1(afsd_logp, " dataVersion on scp = %d", scp->dataVersion);
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ if (code) {
+ /* so we couldn't release it. Just let the lock be for now */
+ code = 0;
+ goto done;
+ } else {
+ scp->serverLock = -1;
+ }
+
+ code = cm_IntSetLock(scp, userp, LockRead, reqp);
+
+ if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
+ scp->serverLock = LockRead;
+ } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
+ /* We lost a race condition. Although we have a valid
+ lock on the file, the data has changed and essentially
+ we have lost the lock we had during the transition. */
+
+ osi_Log0(afsd_logp, "Data version mismatch during lock downgrade");
+ osi_Log2(afsd_logp, " Data versions before=%d, after=%d",
+ scp->lockDataVersion,
+ scp->dataVersion);
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ code = CM_ERROR_INVAL;
+ scp->serverLock = -1;
+ }
+
+ if (code != 0 &&
+ (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
+ (scp->serverLock == -1)) {
+ /* Oopsie */
+ cm_LockMarkSCacheLost(scp);
+ }
+
+ /* failure here has no bearing on the return value of
+ cm_Unlock() */
+ code = 0;
+
+ } else if (scp->serverLock != (-1) &&
+ scp->exclusiveLocks == 0 &&
+ scp->sharedLocks == 0) {
+ /* The serverLock should be released entirely */
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ if (code == 0)
+ scp->serverLock = (-1);
+ }
+
+ done:
+
+ osi_Log1(afsd_logp, "cm_UnlockByKey code 0x%x", code);
+ osi_Log4(afsd_logp, " Leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
+ scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
+ (int)(signed char) scp->serverLock);
+
+ return code;
}
-long cm_Lock(cm_scache_t *scp, unsigned char LockType,
- LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
- u_long Timeout, cm_user_t *userp, cm_req_t *reqp,
- void **lockpp)
+long cm_Unlock(cm_scache_t *scp,
+ unsigned char sLockType,
+ LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
+ cm_key_t key,
+ cm_user_t *userp,
+ cm_req_t *reqp)
{
- long code;
- int Which = ((LockType & 0x1) ? LockRead : LockWrite);
- AFSFid tfid;
- AFSVolSync volSync;
- cm_conn_t *connp;
- cm_file_lock_t *fileLock;
- osi_queue_t *q;
- int found = 0;
-
- /* Look for a conflict. Also, if we are asking for a shared lock,
- * look for another shared lock, so we don't have to do an RPC.
- */
- q = scp->fileLocks;
- while (q) {
- fileLock = (cm_file_lock_t *)
- ((char *) q - offsetof(cm_file_lock_t, fileq));
- if ((fileLock->flags &
- (CM_FILELOCK_FLAG_INVALID | CM_FILELOCK_FLAG_WAITING))
- == 0) {
- if ((LockType & 0x1) == 0
- || (fileLock->LockType & 0x1) == 0)
- return CM_ERROR_WOULDBLOCK;
- found = 1;
- }
- q = osi_QNext(q);
- }
+ long code = 0;
+ int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
+ cm_file_lock_t *fileLock;
+ osi_queue_t *q;
+ int release_userp = FALSE;
- if (found)
- code = 0;
- else {
- tfid.Volume = scp->fid.volume;
- tfid.Vnode = scp->fid.vnode;
- tfid.Unique = scp->fid.unique;
- lock_ReleaseMutex(&scp->mx);
- do {
- code = cm_Conn(&scp->fid, userp, reqp, &connp);
- if (code) break;
- code = RXAFS_SetLock(connp->callp, &tfid, Which,
- &volSync);
- } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync,
- NULL, code));
- lock_ObtainMutex(&scp->mx);
- code = cm_MapRPCError(code, reqp);
- }
+ osi_Log4(afsd_logp, "cm_Unlock scp 0x%p type 0x%x offset %d length %d",
+ scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
+ osi_Log2(afsd_logp, "... key 0x%x:%x",
+ (unsigned long) (key >> 32), (unsigned long) (key & 0xffffffff));
- if (code == 0 || Timeout != 0) {
- fileLock = malloc(sizeof(cm_file_lock_t));
- fileLock->LockType = LockType;
- cm_HoldUser(userp);
- fileLock->userp = userp;
- fileLock->fid = scp->fid;
- fileLock->LOffset = LOffset;
- fileLock->LLength = LLength;
- fileLock->flags = (code == 0 ? 0 : CM_FILELOCK_FLAG_WAITING);
- osi_QAdd(&scp->fileLocks, &fileLock->fileq);
- lock_ObtainWrite(&cm_scacheLock);
- osi_QAdd(&cm_allFileLocks, &fileLock->q);
- lock_ReleaseWrite(&cm_scacheLock);
- if (code != 0) *lockpp = fileLock;
- }
- return code;
+ lock_ObtainRead(&cm_scacheLock);
+
+ for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
+ fileLock = (cm_file_lock_t *)
+ ((char *) q - offsetof(cm_file_lock_t, fileq));
+
+#ifdef DEBUG
+ if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
+ osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
+ osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
+ fileLock->fid.cell,
+ fileLock->fid.volume,
+ fileLock->fid.vnode,
+ fileLock->fid.unique);
+ osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
+ fileLock->scp->fid.cell,
+ fileLock->scp->fid.volume,
+ fileLock->scp->fid.vnode,
+ fileLock->scp->fid.unique);
+ osi_assert(FALSE);
+ }
+#endif
+ if (!IS_LOCK_DELETED(fileLock) &&
+ fileLock->key == key &&
+ fileLock->range.offset == LOffset.QuadPart &&
+ fileLock->range.length == LLength.QuadPart) {
+ break;
+ }
+ }
+
+ if (!q) {
+ osi_Log0(afsd_logp, "cm_Unlock lock not found; failure");
+
+ lock_ReleaseRead(&cm_scacheLock);
+
+ /* The lock didn't exist anyway. *shrug* */
+ return 0;
+ }
+
+ lock_ReleaseRead(&cm_scacheLock);
+
+ /* discard lock record */
+ lock_ObtainWrite(&cm_scacheLock);
+ if (scp->fileLocksT == q)
+ scp->fileLocksT = osi_QPrev(q);
+ osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
+
+ /*
+ * Don't delete it here; let the daemon delete it, to simplify
+ * the daemon's traversal of the list.
+ */
+
+ if (IS_LOCK_CLIENTONLY(fileLock)) {
+ scp->clientLocks--;
+ } else if (IS_LOCK_ACCEPTED(fileLock)) {
+ if (fileLock->lockType == LockRead)
+ scp->sharedLocks--;
+ else
+ scp->exclusiveLocks--;
+ }
+
+ fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
+ if (userp != NULL) {
+ cm_ReleaseUser(fileLock->userp);
+ } else {
+ userp = fileLock->userp;
+ release_userp = TRUE;
+ }
+ fileLock->userp = NULL;
+ cm_ReleaseSCacheNoLock(scp);
+ fileLock->scp = NULL;
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ if (!SERVERLOCKS_ENABLED(scp)) {
+ osi_Log0(afsd_logp, " Skipping server locks for scp");
+ goto done;
+ }
+
+ /* Ideally we would go through the rest of the locks to determine
+ * if one or more locks that were formerly in WAITUNLOCK can now
+ * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
+ * scp->sharedLocks accordingly. However, the retrying of locks
+ * in that manner is done cm_RetryLock() manually.
+ */
+
+ if (scp->serverLock == LockWrite &&
+ scp->exclusiveLocks == 0 &&
+ scp->sharedLocks > 0) {
+
+ /* The serverLock should be downgraded to LockRead */
+ osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
+
+ /* Since we already had a lock, we assume that there is a
+ valid server lock. */
+ scp->lockDataVersion = scp->dataVersion;
+ osi_Log1(afsd_logp, " dataVersion on scp is %d", scp->dataVersion);
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ if (code) {
+ /* so we couldn't release it. Just let the lock be for now */
+ code = 0;
+ goto done;
+ } else {
+ scp->serverLock = -1;
+ }
+
+ code = cm_IntSetLock(scp, userp, LockRead, reqp);
+
+ if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
+ scp->serverLock = LockRead;
+ } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
+ /* Lost a race. We obtained a new lock, but that is
+ meaningless since someone modified the file
+ inbetween. */
+
+ osi_Log0(afsd_logp,
+ "Data version mismatch while downgrading lock");
+ osi_Log2(afsd_logp,
+ " Data versions before=%d, after=%d",
+ scp->lockDataVersion,
+ scp->dataVersion);
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ scp->serverLock = -1;
+ code = CM_ERROR_INVAL;
+ }
+
+ if (code != 0 &&
+ (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
+ (scp->serverLock == -1)) {
+ /* Oopsie */
+ cm_LockMarkSCacheLost(scp);
+ }
+
+ /* failure here has no bearing on the return value of
+ cm_Unlock() */
+ code = 0;
+
+ } else if (scp->serverLock != (-1) &&
+ scp->exclusiveLocks == 0 &&
+ scp->sharedLocks == 0) {
+ /* The serverLock should be released entirely */
+
+ code = cm_IntReleaseLock(scp, userp, reqp);
+
+ if (code == 0) {
+ scp->serverLock = (-1);
+ }
+ }
+
+ if (release_userp)
+ cm_ReleaseUser(userp);
+
+ done:
+
+ osi_Log1(afsd_logp, "cm_Unlock code 0x%x", code);
+ osi_Log4(afsd_logp, " leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
+ scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
+ (int)(signed char) scp->serverLock);
+
+ return code;
}
-long cm_Unlock(cm_scache_t *scp, unsigned char LockType,
- LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
- cm_user_t *userp, cm_req_t *reqp)
+/* called with scp->mx held */
+static void cm_LockMarkSCacheLost(cm_scache_t * scp)
{
- long code = 0;
- int Which = ((LockType & 0x1) ? LockRead : LockWrite);
- AFSFid tfid;
- AFSVolSync volSync;
- cm_conn_t *connp;
- cm_file_lock_t *fileLock, *ourLock;
- osi_queue_t *q, *qq;
- int anotherReader = 0;
- int smallLock = 0;
- int found = 0;
-
- if (LargeIntegerLessThan(LLength, scp->length))
- smallLock = 1;
-
- /* Look for our own lock on the list, so as to remove it.
- * Also, determine if we're the last reader; if not, avoid an RPC.
- */
- q = scp->fileLocks;
- while (q) {
- fileLock = (cm_file_lock_t *)
- ((char *) q - offsetof(cm_file_lock_t, fileq));
- if (!found
- && fileLock->userp == userp
- && LargeIntegerEqualTo(fileLock->LOffset, LOffset)
- && LargeIntegerEqualTo(fileLock->LLength, LLength)) {
- found = 1;
- ourLock = fileLock;
- qq = q;
- }
- else if (fileLock->LockType & 0x1)
- anotherReader = 1;
- q = osi_QNext(q);
- }
+ cm_file_lock_t *fileLock;
+ osi_queue_t *q;
- /* ignore byte ranges */
- if (smallLock && !found)
- return 0;
+ osi_Log1(afsd_logp, "cm_LockMarkSCacheLost scp 0x%x", scp);
- /* don't try to unlock other people's locks */
- if (!found)
- return CM_ERROR_WOULDBLOCK;
+#ifdef DEBUG
+ /* With the current code, we can't lose a lock on a RO scp */
+ osi_assert(!(scp->flags & CM_SCACHEFLAG_RO));
+#endif
- /* discard lock record */
- osi_QRemove(&scp->fileLocks, qq);
- /*
- * Don't delete it here; let the daemon delete it, to simplify
- * the daemon's traversal of the list.
- */
- lock_ObtainWrite(&cm_scacheLock);
- ourLock->flags |= CM_FILELOCK_FLAG_INVALID;
- cm_ReleaseUser(ourLock->userp);
- lock_ReleaseWrite(&cm_scacheLock);
+ /* cm_scacheLock needed because we are modifying fileLock->flags */
+ lock_ObtainWrite(&cm_scacheLock);
- if (!anotherReader) {
- tfid.Volume = scp->fid.volume;
- tfid.Vnode = scp->fid.vnode;
- tfid.Unique = scp->fid.unique;
- lock_ReleaseMutex(&scp->mx);
- do {
- code = cm_Conn(&scp->fid, userp, reqp, &connp);
- if (code)
- break;
- code = RXAFS_ReleaseLock(connp->callp, &tfid, &volSync);
- } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync,
- NULL, code));
- code = cm_MapRPCError(code, reqp);
- lock_ObtainMutex(&scp->mx);
- }
+ for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
+ fileLock =
+ (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
+
+ if (IS_LOCK_ACTIVE(fileLock) &&
+ !IS_LOCK_CLIENTONLY(fileLock)) {
+ if (fileLock->lockType == LockRead)
+ scp->sharedLocks--;
+ else
+ scp->exclusiveLocks--;
+
+ fileLock->flags |= CM_FILELOCK_FLAG_LOST;
+ }
+ }
- return code;
+ scp->serverLock = -1;
+ scp->lockDataVersion = -1;
+ lock_ReleaseWrite(&cm_scacheLock);
}
+/* Called with no relevant locks held */
void cm_CheckLocks()
{
- osi_queue_t *q, *nq;
- cm_file_lock_t *fileLock;
- cm_req_t req;
- AFSFid tfid;
- AFSVolSync volSync;
- cm_conn_t *connp;
- long code;
+ osi_queue_t *q, *nq;
+ cm_file_lock_t *fileLock;
+ cm_req_t req;
+ AFSFid tfid;
+ AFSVolSync volSync;
+ cm_conn_t *connp;
+ long code;
+ struct rx_connection * callp;
+ cm_scache_t * scp;
- cm_InitReq(&req);
+ cm_InitReq(&req);
- lock_ObtainWrite(&cm_scacheLock);
- q = cm_allFileLocks;
- while (q) {
- fileLock = (cm_file_lock_t *) q;
- nq = osi_QNext(q);
- if (fileLock->flags & CM_FILELOCK_FLAG_INVALID) {
- osi_QRemove(&cm_allFileLocks, q);
- free(fileLock);
- }
- else if (!(fileLock->flags & CM_FILELOCK_FLAG_WAITING)) {
- tfid.Volume = fileLock->fid.volume;
- tfid.Vnode = fileLock->fid.vnode;
- tfid.Unique = fileLock->fid.unique;
- lock_ReleaseWrite(&cm_scacheLock);
- do {
- code = cm_Conn(&fileLock->fid, fileLock->userp,
- &req, &connp);
- if (code) break;
- code = RXAFS_ExtendLock(connp->callp, &tfid,
- &volSync);
- } while (cm_Analyze(connp, fileLock->userp, &req,
- &fileLock->fid, &volSync, NULL,
- code));
- code = cm_MapRPCError(code, &req);
- lock_ObtainWrite(&cm_scacheLock);
- }
- q = nq;
- }
- lock_ReleaseWrite(&cm_scacheLock);
+ lock_ObtainWrite(&cm_scacheLock);
+
+ cm_lockRefreshCycle++;
+
+ osi_Log1(afsd_logp, "cm_CheckLocks starting lock check cycle %d", cm_lockRefreshCycle);
+
+ for (q = cm_allFileLocks; q; q = nq) {
+ fileLock = (cm_file_lock_t *) q;
+ nq = osi_QNext(q);
+ code = -1;
+
+ if (IS_LOCK_DELETED(fileLock)) {
+
+ osi_QRemove(&cm_allFileLocks, q);
+ cm_PutFileLock(fileLock);
+
+ } else if (IS_LOCK_ACTIVE(fileLock) && !IS_LOCK_CLIENTONLY(fileLock)) {
+
+ /* Server locks must have been enabled for us to have
+ received an active non-client-only lock. */
+ osi_assert(cm_enableServerLocks);
+
+ scp = fileLock->scp;
+ osi_assert(scp != NULL);
+
+ cm_HoldSCacheNoLock(scp);
+
+#ifdef DEBUG
+ if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
+ osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
+ osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
+ fileLock->fid.cell,
+ fileLock->fid.volume,
+ fileLock->fid.vnode,
+ fileLock->fid.unique);
+ osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
+ fileLock->scp->fid.cell,
+ fileLock->scp->fid.volume,
+ fileLock->scp->fid.vnode,
+ fileLock->scp->fid.unique);
+ osi_assert(FALSE);
+ }
+#endif
+ /* Server locks are extended once per scp per refresh
+ cycle. */
+ if (scp->lastRefreshCycle != cm_lockRefreshCycle) {
+
+ int scp_done = FALSE;
+
+ osi_Log1(afsd_logp, "cm_CheckLocks Updating scp 0x%x", scp);
+
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ObtainMutex(&scp->mx);
+
+ /* did the lock change while we weren't holding the lock? */
+ if (!IS_LOCK_ACTIVE(fileLock))
+ goto post_syncopdone;
+
+ code = cm_SyncOp(scp, NULL, fileLock->userp, &req, 0,
+ CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_LOCK);
+
+ if (code) {
+ osi_Log1(smb_logp,
+ "cm_CheckLocks SyncOp failure code 0x%x", code);
+ goto post_syncopdone;
+ }
+
+ /* cm_SyncOp releases scp->mx during which the lock
+ may get released. */
+ if (!IS_LOCK_ACTIVE(fileLock))
+ goto pre_syncopdone;
+
+ if (scp->serverLock != -1) {
+ cm_fid_t cfid;
+ cm_user_t * userp;
+
+ tfid.Volume = scp->fid.volume;
+ tfid.Vnode = scp->fid.vnode;
+ tfid.Unique = scp->fid.unique;
+ cfid = scp->fid;
+ userp = fileLock->userp;
+
+ osi_Log3(afsd_logp, "CALL ExtendLock lock 0x%p for scp=0x%p with lock %d",
+ fileLock,
+ scp,
+ (int) scp->serverLock);
+
+ lock_ReleaseMutex(&scp->mx);
+
+ do {
+ code = cm_Conn(&cfid, userp,
+ &req, &connp);
+ if (code)
+ break;
+
+ callp = cm_GetRxConn(connp);
+ code = RXAFS_ExtendLock(callp, &tfid,
+ &volSync);
+ rx_PutConnection(callp);
+
+ osi_Log1(afsd_logp, " ExtendLock returns %d", code);
+
+ } while (cm_Analyze(connp, userp, &req,
+ &cfid, &volSync, NULL, NULL,
+ code));
+
+ code = cm_MapRPCError(code, &req);
+
+ lock_ObtainMutex(&scp->mx);
+
+ if (code) {
+ osi_Log1(afsd_logp, "CALL ExtendLock FAILURE, code 0x%x", code);
+ } else {
+ osi_Log0(afsd_logp, "CALL ExtendLock SUCCESS");
+ scp->lockDataVersion = scp->dataVersion;
+ }
+
+ if ((code == EINVAL || code == CM_ERROR_INVAL) &&
+ scp->lockDataVersion == scp->dataVersion) {
+ int lockType;
+
+ lockType =
+ (scp->exclusiveLocks > 0) ? LockWrite: LockRead;
+
+ /* we might still have a chance to obtain a
+ new lock */
+
+ code = cm_IntSetLock(scp, userp, lockType, &req);
+
+ if (code) {
+ code = CM_ERROR_INVAL;
+ } else if (scp->lockDataVersion != scp->dataVersion) {
+
+ /* now check if we still have the file at
+ the right data version. */
+ osi_Log1(afsd_logp,
+ "Data version mismatch on scp 0x%p",
+ scp);
+ osi_Log2(afsd_logp,
+ " Data versions: before=%d, after=%d",
+ scp->lockDataVersion,
+ scp->dataVersion);
+
+ code = cm_IntReleaseLock(scp, userp, &req);
+
+ code = CM_ERROR_INVAL;
+ }
+ }
+
+ if (code == EINVAL || code == CM_ERROR_INVAL) {
+ cm_LockMarkSCacheLost(scp);
+ }
+
+ } else {
+ /* interestingly, we have found an active lock
+ belonging to an scache that has no
+ serverLock */
+ cm_LockMarkSCacheLost(scp);
+ }
+
+ scp_done = TRUE;
+
+ pre_syncopdone:
+
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
+
+ post_syncopdone:
+ lock_ReleaseMutex(&scp->mx);
+
+ lock_ObtainWrite(&cm_scacheLock);
+
+ if (code == 0) {
+ fileLock->lastUpdate = time(NULL);
+ }
+
+ if (scp_done)
+ scp->lastRefreshCycle = cm_lockRefreshCycle;
+
+ } else {
+ /* we have already refreshed the locks on this scp */
+ fileLock->lastUpdate = time(NULL);
+ }
+
+ cm_ReleaseSCacheNoLock(scp);
+
+ } else if (IS_LOCK_ACTIVE(fileLock) && IS_LOCK_CLIENTONLY(fileLock)) {
+ /* TODO: Check callbacks */
+ }
+ }
+
+ lock_ReleaseWrite(&cm_scacheLock);
+ osi_Log1(afsd_logp, "cm_CheckLocks completes lock check cycle %d", cm_lockRefreshCycle);
}
-long cm_RetryLock(cm_file_lock_t *oldFileLock, int vcp_is_dead)
+/* NOT called with scp->mx held. */
+long cm_RetryLock(cm_file_lock_t *oldFileLock, int client_is_dead)
{
- long code;
- int Which = ((oldFileLock->LockType & 0x1) ? LockRead : LockWrite);
- cm_scache_t *scp;
- AFSFid tfid;
- AFSVolSync volSync;
- cm_conn_t *connp;
- cm_file_lock_t *fileLock;
- osi_queue_t *q;
- cm_req_t req;
- int found = 0;
-
- if (vcp_is_dead) {
- code = CM_ERROR_TIMEDOUT;
- goto handleCode;
- }
+ long code = 0;
+ cm_scache_t *scp = NULL;
+ cm_file_lock_t *fileLock;
+ osi_queue_t *q;
+ cm_req_t req;
+ int newLock = -1;
+ int force_client_lock = FALSE;
+
+ cm_InitReq(&req);
+
+ if (client_is_dead) {
+ code = CM_ERROR_TIMEDOUT;
+ goto updateLock;
+ }
+
+ lock_ObtainRead(&cm_scacheLock);
+
+ osi_Log2(afsd_logp, "cm_RetryLock checking lock %p (scp=%p)", oldFileLock, oldFileLock->scp);
+ osi_Log4(afsd_logp, " offset(%x:%x) length(%x:%x)",
+ (unsigned)(oldFileLock->range.offset >> 32),
+ (unsigned)(oldFileLock->range.offset & 0xffffffff),
+ (unsigned)(oldFileLock->range.length >> 32),
+ (unsigned)(oldFileLock->range.length & 0xffffffff));
+ osi_Log3(afsd_logp, " key(%x:%x) flags=%x",
+ (unsigned)(oldFileLock->key >> 32),
+ (unsigned)(oldFileLock->key & 0xffffffff),
+ (unsigned)(oldFileLock->flags));
+
+ /* if the lock has already been granted, then we have nothing to do */
+ if (IS_LOCK_ACTIVE(oldFileLock)) {
+ lock_ReleaseRead(&cm_scacheLock);
+ osi_Log0(afsd_logp, "cm_RetryLock lock already granted");
+ return 0;
+ }
- cm_InitReq(&req);
+ /* we can't do anything with lost or deleted locks at the moment. */
+ if (IS_LOCK_LOST(oldFileLock) || IS_LOCK_DELETED(oldFileLock)) {
+ code = CM_ERROR_BADFD;
+ osi_Log0(afsd_logp, "cm_RetryLock lock is lost or deleted");
+ lock_ReleaseRead(&cm_scacheLock);
+ goto updateLock;
+ }
- /* Look for a conflict. Also, if we are asking for a shared lock,
- * look for another shared lock, so we don't have to do an RPC.
- */
- code = cm_GetSCache(&oldFileLock->fid, &scp, oldFileLock->userp, &req);
- if (code)
- return code;
-
- q = scp->fileLocks;
- while (q) {
- fileLock = (cm_file_lock_t *)
- ((char *) q - offsetof(cm_file_lock_t, fileq));
- if ((fileLock->flags &
- (CM_FILELOCK_FLAG_INVALID | CM_FILELOCK_FLAG_WAITING))
- == 0) {
- if ((oldFileLock->LockType & 0x1) == 0
- || (fileLock->LockType & 0x1) == 0) {
- cm_ReleaseSCache(scp);
- return CM_ERROR_WOULDBLOCK;
- }
- found = 1;
- }
- q = osi_QNext(q);
- }
+ scp = oldFileLock->scp;
- if (found)
- code = 0;
- else {
- tfid.Volume = oldFileLock->fid.volume;
- tfid.Vnode = oldFileLock->fid.vnode;
- tfid.Unique = oldFileLock->fid.unique;
- do {
- code = cm_Conn(&oldFileLock->fid, oldFileLock->userp,
- &req, &connp);
- if (code) break;
- code = RXAFS_SetLock(connp->callp, &tfid, Which,
- &volSync);
- } while (cm_Analyze(connp, oldFileLock->userp, &req,
- &oldFileLock->fid, &volSync,
- NULL, code));
- code = cm_MapRPCError(code, &req);
- }
+ osi_assert(scp != NULL);
+
+ lock_ReleaseRead(&cm_scacheLock);
+ lock_ObtainMutex(&scp->mx);
+
+ code = cm_LockCheckPerms(scp, oldFileLock->lockType,
+ oldFileLock->userp,
+ &req);
+
+ if (code == CM_ERROR_NOACCESS && oldFileLock->lockType == LockRead) {
+ force_client_lock = TRUE;
+ code = 0;
+ } else if (code) {
+ lock_ReleaseMutex(&scp->mx);
+ return code;
+ }
+
+ lock_ObtainWrite(&cm_scacheLock);
+
+ /* Check if we already have a sufficient server lock to allow this
+ lock to go through. */
+ if (IS_LOCK_WAITLOCK(oldFileLock) &&
+ (!SERVERLOCKS_ENABLED(scp) ||
+ scp->serverLock == oldFileLock->lockType ||
+ scp->serverLock == LockWrite)) {
+
+ oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
+
+ if (SERVERLOCKS_ENABLED(scp)) {
+ osi_Log1(afsd_logp, "cm_RetryLock Server lock (%d) is sufficient for lock. Granting",
+ (int) scp->serverLock);
+ } else {
+ osi_Log0(afsd_logp, "cm_RetryLock skipping server lock for scp");
+ }
+
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ReleaseMutex(&scp->mx);
+
+ return 0;
+ }
+
+ if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
+
+ /* check if the conflicting locks have dissappeared already */
+ for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
+
+ fileLock = (cm_file_lock_t *)
+ ((char *) q - offsetof(cm_file_lock_t, fileq));
+
+ if (IS_LOCK_LOST(fileLock)) {
+ if (fileLock->key == oldFileLock->key) {
+ code = CM_ERROR_BADFD;
+ oldFileLock->flags |= CM_FILELOCK_FLAG_LOST;
+ osi_Log1(afsd_logp, " found lost lock %p for same key. Marking lock as lost",
+ fileLock);
+ break;
+ } else if (fileLock->lockType == LockWrite &&
+ INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
+ osi_Log1(afsd_logp, " found conflicting LOST lock %p", fileLock);
+ code = CM_ERROR_WOULDBLOCK;
+ break;
+ }
+ }
+
+ if (IS_LOCK_ACCEPTED(fileLock) &&
+ INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
+
+ if (oldFileLock->lockType != LockRead ||
+ fileLock->lockType != LockRead) {
+
+ osi_Log1(afsd_logp, " found conflicting lock %p", fileLock);
+ code = CM_ERROR_WOULDBLOCK;
+ break;
+ }
+ }
+ }
+ }
+
+ if (code != 0) {
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ReleaseMutex(&scp->mx);
+
+ goto handleCode;
+ }
+
+ /* when we get here, the lock is either a WAITUNLOCK or WAITLOCK.
+ If it is WAITUNLOCK, then we didn't find any conflicting lock
+ but we haven't verfied whether the serverLock is sufficient to
+ assert it. If it is WAITLOCK, then the serverLock is
+ insufficient to assert it. Eitherway, we are ready to accept
+ the lock as either ACTIVE or WAITLOCK depending on the
+ serverLock. */
+
+ /* First, promote the WAITUNLOCK to a WAITLOCK */
+ if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
+ if (oldFileLock->lockType == LockRead)
+ scp->sharedLocks++;
+ else
+ scp->exclusiveLocks++;
+
+ oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITUNLOCK;
+ oldFileLock->flags |= CM_FILELOCK_FLAG_WAITLOCK;
+ }
+
+ if (force_client_lock ||
+ !SERVERLOCKS_ENABLED(scp) ||
+ scp->serverLock == oldFileLock->lockType ||
+ (oldFileLock->lockType == LockRead &&
+ scp->serverLock == LockWrite)) {
+
+ oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
+
+ if ((force_client_lock ||
+ !SERVERLOCKS_ENABLED(scp)) &&
+ !IS_LOCK_CLIENTONLY(oldFileLock)) {
+
+ oldFileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
+
+ if (oldFileLock->lockType == LockRead)
+ scp->sharedLocks--;
+ else
+ scp->exclusiveLocks--;
+
+ scp->clientLocks++;
+ }
+
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ReleaseMutex(&scp->mx);
+
+ return 0;
+
+ } else {
+ cm_user_t * userp;
+
+ code = cm_SyncOp(scp, NULL, oldFileLock->userp, &req, 0,
+ CM_SCACHESYNC_NEEDCALLBACK
+ | CM_SCACHESYNC_GETSTATUS
+ | CM_SCACHESYNC_LOCK);
+ if (code) {
+ osi_Log1(smb_logp, "cm_RetryLock SyncOp failure code 0x%x", code);
+ lock_ReleaseWrite(&cm_scacheLock);
+ goto post_syncopdone;
+ }
+
+ if (!IS_LOCK_WAITLOCK(oldFileLock))
+ goto pre_syncopdone;
+
+ userp = oldFileLock->userp;
+
+#ifndef AGGRESSIVE_LOCKS
+ newLock = oldFileLock->lockType;
+#else
+ newLock = LockWrite;
+#endif
+
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ code = cm_IntSetLock(scp, userp, newLock, &req);
+
+ pre_syncopdone:
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
+ post_syncopdone:
+ ;
+ }
handleCode:
- if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
- lock_ObtainMutex(&scp->mx);
- osi_QRemove(&scp->fileLocks, &oldFileLock->fileq);
- lock_ReleaseMutex(&scp->mx);
- }
+ if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
lock_ObtainWrite(&cm_scacheLock);
- if (code == 0)
- oldFileLock->flags = 0;
- else if (code != CM_ERROR_WOULDBLOCK) {
- oldFileLock->flags |= CM_FILELOCK_FLAG_INVALID;
- cm_ReleaseUser(oldFileLock->userp);
- oldFileLock->userp = NULL;
- }
+ if (scp->fileLocksT == &oldFileLock->fileq)
+ scp->fileLocksT = osi_QPrev(&oldFileLock->fileq);
+ osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, &oldFileLock->fileq);
lock_ReleaseWrite(&cm_scacheLock);
+ } else if (code == 0 && IS_LOCK_WAITLOCK(oldFileLock)) {
+ scp->serverLock = newLock;
+ }
+ lock_ReleaseMutex(&scp->mx);
+
+ updateLock:
+ lock_ObtainWrite(&cm_scacheLock);
+ if (code == 0) {
+ oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
+ } else if (code != CM_ERROR_WOULDBLOCK) {
+ oldFileLock->flags |= CM_FILELOCK_FLAG_DELETED;
+ cm_ReleaseUser(oldFileLock->userp);
+ oldFileLock->userp = NULL;
+ if (oldFileLock->scp) {
+ cm_ReleaseSCacheNoLock(oldFileLock->scp);
+ oldFileLock->scp = NULL;
+ }
+ }
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ return code;
+}
+
+cm_key_t cm_GenerateKey(unsigned int session_id, unsigned long process_id, unsigned int file_id)
+{
+#ifdef DEBUG
+ osi_assert((process_id & 0xffffffff) == process_id);
+ osi_assert((session_id & 0xffff) == session_id);
+ osi_assert((file_id & 0xffff) == file_id);
+#endif
+
+ return
+ (((cm_key_t) (process_id & 0xffffffff)) << 32) |
+ (((cm_key_t) (session_id & 0xffff)) << 16) |
+ (((cm_key_t) (file_id & 0xffff)));
+}
+
+static int cm_KeyEquals(cm_key_t k1, cm_key_t k2, int flags)
+{
+ if (flags & CM_UNLOCK_BY_FID) {
+ return ((k1 & 0xffffffff) == (k2 & 0xffffffff));
+ } else {
+ return (k1 == k2);
+ }
+}
- return code;
+void cm_ReleaseAllLocks(void)
+{
+ cm_scache_t *scp;
+ cm_req_t req;
+ cm_user_t *userp;
+ cm_key_t key;
+ cm_file_lock_t *fileLock;
+ unsigned int i;
+
+ for (i = 0; i < cm_data.hashTableSize; i++)
+ {
+ for ( scp = cm_data.hashTablep[i]; scp; scp = scp->nextp ) {
+ while (scp->fileLocksH != NULL) {
+ lock_ObtainMutex(&scp->mx);
+ lock_ObtainWrite(&cm_scacheLock);
+ if (!scp->fileLocksH) {
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ReleaseMutex(&scp->mx);
+ break;
+ }
+ fileLock = (cm_file_lock_t *)((char *) scp->fileLocksH - offsetof(cm_file_lock_t, fileq));
+ userp = fileLock->userp;
+ cm_HoldUser(userp);
+ key = fileLock->key;
+ cm_HoldSCacheNoLock(scp);
+ lock_ReleaseWrite(&cm_scacheLock);
+ cm_UnlockByKey(scp, key, 0, userp, &req);
+ cm_ReleaseSCache(scp);
+ cm_ReleaseUser(userp);
+ lock_ReleaseMutex(&scp->mx);
+ }
+ }
+ }
}
git://git.openafs.org / openafs.git / blobdiff