#include <afsconfig.h>
#include <afs/param.h>
-RCSID("$Header$");
#include <stdio.h>
#include <sys/types.h>
#include <errno.h>
+#include <string.h>
#ifdef AFS_NT40_ENV
#include <fcntl.h>
#else
#include <sys/resource.h>
#endif
#endif
-#ifdef HAVE_STRING_H
-#include <string.h>
-#else
-#ifdef HAVE_STRINGS_H
-#include <strings.h>
-#endif
-#endif
+
#include <rx/xdr.h>
#include <afs/afsint.h>
#include <errno.h>
#include <afs/afssyscalls.h>
-#include "ihandle.h"
#include "nfs.h"
+#include "ihandle.h"
#include "viceinode.h"
#ifdef AFS_PTHREAD_ENV
#include <assert.h>
#endif /* AFS_PTHREAD_ENV */
#include <limits.h>
-extern afs_int32 DErrno;
+#ifndef AFS_NT40_ENV
+#ifdef O_LARGEFILE
+#define afs_stat stat64
+#define afs_fstat fstat64
+#else /* !O_LARGEFILE */
+#define afs_stat stat
+#define afs_fstat fstat
+#endif /* !O_LARGEFILE */
+#endif /* AFS_NT40_ENV */
#ifdef AFS_PTHREAD_ENV
pthread_once_t ih_glock_once = PTHREAD_ONCE_INIT;
FdHandle_t *fdLruTail;
int ih_Inited = 0;
+int ih_PkgDefaultsSet = 0;
/* Most of the servers use fopen/fdopen. Since the FILE structure
* only has eight bits for the file descriptor, the cache size
* has to be less than 256. The cache can be made larger as long
* as you are sure you don't need fopen/fdopen. */
+
+/* As noted in ihandle.h, the fileno member of FILE on most platforms
+ * in 2008 is a 16- or 32-bit signed int. -Matt
+ */
int fdMaxCacheSize = 0;
int fdCacheSize = 0;
/* Hash table for inode handles */
IHashBucket_t ihashTable[I_HANDLE_HASH_SIZE];
+void *ih_sync_thread(void *);
+
+/* start-time configurable I/O limits */
+ih_init_params vol_io_params;
+
+void ih_PkgDefaults(void)
+{
+ /* once */
+ ih_PkgDefaultsSet = 1;
+
+ /* default to well-known values */
+ vol_io_params.fd_handle_setaside = FD_HANDLE_SETASIDE;
+
+ /* initial fd cachesize. the only one that will be used if
+ * the application does not call ih_UseLargeCache(). set this
+ * to a value representable in fileno member of the system's
+ * FILE structure (or equivalent). */
+ vol_io_params.fd_initial_cachesize = FD_DEFAULT_CACHESIZE;
+
+ /* fd cache size that will be used if/when ih_UseLargeCache()
+ * is called */
+ vol_io_params.fd_max_cachesize = FD_MAX_CACHESIZE;
+}
#ifdef AFS_PTHREAD_ENV
/* Initialize the global ihandle mutex */
-void ih_glock_init()
+void
+ih_glock_init(void)
{
assert(pthread_mutex_init(&ih_glock_mutex, NULL) == 0);
}
#endif /* AFS_PTHREAD_ENV */
/* Initialize the file descriptor cache */
-void ih_Initialize() {
+void
+ih_Initialize(void)
+{
int i;
assert(!ih_Inited);
ih_Inited = 1;
DLL_INIT_LIST(ihAvailHead, ihAvailTail);
DLL_INIT_LIST(fdAvailHead, fdAvailTail);
DLL_INIT_LIST(fdLruHead, fdLruTail);
- for (i = 0 ; i < I_HANDLE_HASH_SIZE ; i++) {
+ for (i = 0; i < I_HANDLE_HASH_SIZE; i++) {
DLL_INIT_LIST(ihashTable[i].ihash_head, ihashTable[i].ihash_tail);
}
#if defined(AFS_NT40_ENV)
- fdMaxCacheSize = FD_MAX_CACHESIZE;
+ fdMaxCacheSize = vol_io_params.fd_max_cachesize;
#elif defined(AFS_SUN5_ENV) || defined(AFS_NBSD_ENV)
{
struct rlimit rlim;
assert(getrlimit(RLIMIT_NOFILE, &rlim) == 0);
rlim.rlim_cur = rlim.rlim_max;
assert(setrlimit(RLIMIT_NOFILE, &rlim) == 0);
- fdMaxCacheSize = rlim.rlim_cur-FD_HANDLE_SETASIDE;
+ fdMaxCacheSize = rlim.rlim_cur - vol_io_params.fd_handle_setaside;
#ifdef AFS_NBSD_ENV
/* XXX this is to avoid using up all system fd netbsd is
* somewhat broken and have set maximum fd for a root process
*/
fdMaxCacheSize /= 4;
#endif
- fdMaxCacheSize = MIN(fdMaxCacheSize, FD_MAX_CACHESIZE);
+ fdMaxCacheSize = MIN(fdMaxCacheSize, vol_io_params.fd_max_cachesize);
assert(fdMaxCacheSize > 0);
}
#elif defined(AFS_HPUX_ENV)
/* Avoid problems with "UFSOpen: igetinode failed" panics on HPUX 11.0 */
fdMaxCacheSize = 0;
#else
- fdMaxCacheSize = MAX(sysconf(_SC_OPEN_MAX)-FD_HANDLE_SETASIDE, 0);
- fdMaxCacheSize = MIN(fdMaxCacheSize, FD_MAX_CACHESIZE);
+ {
+ long fdMax = MAX(sysconf(_SC_OPEN_MAX) - vol_io_params.fd_handle_setaside,
+ 0);
+ fdMaxCacheSize = (int)MIN(fdMax, vol_io_params.fd_max_cachesize);
+ }
#endif
- fdCacheSize = MIN(fdMaxCacheSize, FD_DEFAULT_CACHESIZE);
+ fdCacheSize = MIN(fdMaxCacheSize, vol_io_params.fd_initial_cachesize);
+
+ {
+#ifdef AFS_PTHREAD_ENV
+ pthread_t syncer;
+ pthread_attr_t tattr;
+
+ pthread_attr_init(&tattr);
+ pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED);
+
+ pthread_create(&syncer, &tattr, ih_sync_thread, NULL);
+#else /* AFS_PTHREAD_ENV */
+ PROCESS syncer;
+ LWP_CreateProcess(ih_sync_thread, 16*1024, LWP_MAX_PRIORITY - 2,
+ NULL, "ih_syncer", &syncer);
+#endif /* AFS_PTHREAD_ENV */
+ }
+
}
/* Make the file descriptor cache as big as possible. Don't this call
- * if the program uses fopen or fdopen. */
-void ih_UseLargeCache() {
- IH_LOCK
+ * if the program uses fopen or fdopen, if fd_max_cachesize cannot be
+ * represented in the fileno member of the system FILE structure (or
+ * equivalent).
+ */
+void
+ih_UseLargeCache(void)
+{
+ IH_LOCK;
+
+ if (!ih_PkgDefaultsSet) {
+ ih_PkgDefaults();
+ }
if (!ih_Inited) {
- ih_Initialize();
+ ih_Initialize();
}
+
fdCacheSize = fdMaxCacheSize;
- IH_UNLOCK
+ IH_UNLOCK;
}
/* Allocate a chunk of inode handles */
-void iHandleAllocateChunk()
+void
+iHandleAllocateChunk(void)
{
int i;
IHandle_t *ihP;
assert(ihAvailHead == NULL);
- ihP = (IHandle_t *)malloc(I_HANDLE_MALLOCSIZE * sizeof(IHandle_t));
+ ihP = (IHandle_t *) malloc(I_HANDLE_MALLOCSIZE * sizeof(IHandle_t));
assert(ihP != NULL);
- for (i = 0 ; i < I_HANDLE_MALLOCSIZE ; i++) {
+ for (i = 0; i < I_HANDLE_MALLOCSIZE; i++) {
ihP[i].ih_refcnt = 0;
DLL_INSERT_TAIL(&ihP[i], ihAvailHead, ihAvailTail, ih_next, ih_prev);
}
}
/* Initialize an inode handle */
-IHandle_t *ih_init(int dev, int vid, Inode ino)
+IHandle_t *
+ih_init(int dev, int vid, Inode ino)
{
int ihash = IH_HASH(dev, vid, ino);
IHandle_t *ihP;
- IH_LOCK
+ if (!ih_PkgDefaultsSet) {
+ ih_PkgDefaults();
+ }
+ IH_LOCK;
if (!ih_Inited) {
- ih_Initialize();
+ ih_Initialize();
}
/* Do we already have a handle for this Inode? */
- for (ihP = ihashTable[ihash].ihash_head ; ihP ; ihP = ihP->ih_next) {
+ for (ihP = ihashTable[ihash].ihash_head; ihP; ihP = ihP->ih_next) {
if (ihP->ih_ino == ino && ihP->ih_vid == vid && ihP->ih_dev == dev) {
ihP->ih_refcnt++;
- IH_UNLOCK
+ IH_UNLOCK;
return ihP;
}
}
ihP->ih_vid = vid;
ihP->ih_ino = ino;
ihP->ih_flags = 0;
+ ihP->ih_synced = 0;
ihP->ih_refcnt = 1;
DLL_INIT_LIST(ihP->ih_fdhead, ihP->ih_fdtail);
DLL_INSERT_TAIL(ihP, ihashTable[ihash].ihash_head,
ihashTable[ihash].ihash_tail, ih_next, ih_prev);
- IH_UNLOCK
+ IH_UNLOCK;
return ihP;
}
/* Copy an inode handle */
-IHandle_t *ih_copy(IHandle_t *ihP)
+IHandle_t *
+ih_copy(IHandle_t * ihP)
{
- IH_LOCK
+ IH_LOCK;
assert(ih_Inited);
assert(ihP->ih_refcnt > 0);
ihP->ih_refcnt++;
- IH_UNLOCK
+ IH_UNLOCK;
return ihP;
}
/* Allocate a chunk of file descriptor handles */
-void fdHandleAllocateChunk()
+void
+fdHandleAllocateChunk(void)
{
int i;
FdHandle_t *fdP;
assert(fdAvailHead == NULL);
- fdP = (FdHandle_t *)malloc(FD_HANDLE_MALLOCSIZE * sizeof(FdHandle_t));
+ fdP = (FdHandle_t *) malloc(FD_HANDLE_MALLOCSIZE * sizeof(FdHandle_t));
assert(fdP != NULL);
- for (i = 0 ; i < FD_HANDLE_MALLOCSIZE ; i++) {
+ for (i = 0; i < FD_HANDLE_MALLOCSIZE; i++) {
fdP[i].fd_status = FD_HANDLE_AVAIL;
fdP[i].fd_ih = NULL;
fdP[i].fd_fd = INVALID_FD;
}
/* Allocate a chunk of stream handles */
-void streamHandleAllocateChunk()
+void
+streamHandleAllocateChunk(void)
{
int i;
StreamHandle_t *streamP;
assert(streamAvailHead == NULL);
streamP = (StreamHandle_t *)
- malloc(STREAM_HANDLE_MALLOCSIZE * sizeof(StreamHandle_t));
+ malloc(STREAM_HANDLE_MALLOCSIZE * sizeof(StreamHandle_t));
assert(streamP != NULL);
- for (i = 0 ; i < STREAM_HANDLE_MALLOCSIZE ; i++) {
+ for (i = 0; i < STREAM_HANDLE_MALLOCSIZE; i++) {
streamP[i].str_fd = INVALID_FD;
DLL_INSERT_TAIL(&streamP[i], streamAvailHead, streamAvailTail,
str_next, str_prev);
/*
* Get a file descriptor handle given an Inode handle
*/
-FdHandle_t *ih_open(IHandle_t *ihP)
+FdHandle_t *
+ih_open(IHandle_t * ihP)
{
FdHandle_t *fdP;
FD_t fd;
FD_t closeFd;
- if (!ihP) /* XXX should log here in the fileserver */
+ if (!ihP) /* XXX should log here in the fileserver */
return NULL;
- IH_LOCK
+ IH_LOCK;
/* Do we already have an open file handle for this Inode? */
- for (fdP = ihP->ih_fdtail ; fdP != NULL ; fdP = fdP->fd_ihprev) {
+ for (fdP = ihP->ih_fdtail; fdP != NULL; fdP = fdP->fd_ihprev) {
if (fdP->fd_status != FD_HANDLE_INUSE) {
assert(fdP->fd_status == FD_HANDLE_OPEN);
fdP->fd_status = FD_HANDLE_INUSE;
DLL_DELETE(fdP, fdLruHead, fdLruTail, fd_next, fd_prev);
ihP->ih_refcnt++;
- IH_UNLOCK
- FDH_SEEK(fdP, 0, SEEK_SET);
+ IH_UNLOCK;
+ (void)FDH_SEEK(fdP, 0, SEEK_SET);
return fdP;
}
}
* Try to open the Inode, return NULL on error.
*/
fdInUseCount += 1;
- IH_UNLOCK
+ IH_UNLOCK;
+ih_open_retry:
fd = OS_IOPEN(ihP);
- IH_LOCK
- if (fd == INVALID_FD) {
+ IH_LOCK;
+ if (fd == INVALID_FD && (errno != EMFILE || fdLruHead == NULL) ) {
fdInUseCount -= 1;
- IH_UNLOCK
+ IH_UNLOCK;
return NULL;
}
* we permit the number of open files to exceed fdCacheSize.
* We only recycle open file descriptors when the number
* of open files reaches the size of the cache */
- if (fdInUseCount > fdCacheSize && fdLruHead != NULL) {
+ if ((fdInUseCount > fdCacheSize || fd == INVALID_FD) && fdLruHead != NULL) {
fdP = fdLruHead;
assert(fdP->fd_status == FD_HANDLE_OPEN);
DLL_DELETE(fdP, fdLruHead, fdLruTail, fd_next, fd_prev);
DLL_DELETE(fdP, fdP->fd_ih->ih_fdhead, fdP->fd_ih->ih_fdtail,
- fd_ihnext, fd_ihprev);
+ fd_ihnext, fd_ihprev);
closeFd = fdP->fd_fd;
+ if (fd == INVALID_FD) {
+ fdCacheSize--; /* reduce in order to not run into here too often */
+ DLL_INSERT_TAIL(fdP, fdAvailHead, fdAvailTail, fd_next, fd_prev);
+ fdP->fd_status = FD_HANDLE_AVAIL;
+ fdP->fd_ih = NULL;
+ fdP->fd_fd = INVALID_FD;
+ IH_UNLOCK;
+ OS_CLOSE(closeFd);
+ goto ih_open_retry;
+ }
} else {
if (fdAvailHead == NULL) {
fdHandleAllocateChunk();
ihP->ih_refcnt++;
/* Add this handle to the Inode's list of open descriptors */
- DLL_INSERT_TAIL(fdP, ihP->ih_fdhead, ihP->ih_fdtail, fd_ihnext, fd_ihprev);
+ DLL_INSERT_TAIL(fdP, ihP->ih_fdhead, ihP->ih_fdtail, fd_ihnext,
+ fd_ihprev);
if (closeFd != INVALID_FD) {
- IH_UNLOCK
+ IH_UNLOCK;
OS_CLOSE(closeFd);
- IH_LOCK
+ IH_LOCK;
fdInUseCount -= 1;
}
- IH_UNLOCK
+ IH_UNLOCK;
return fdP;
}
/*
* Return a file descriptor handle to the cache
*/
-int fd_close(FdHandle_t *fdP)
+int
+fd_close(FdHandle_t * fdP)
{
- FD_t closeFd;
IHandle_t *ihP;
if (!fdP)
return 0;
- IH_LOCK
-
+ IH_LOCK;
assert(ih_Inited);
assert(fdInUseCount > 0);
assert(fdP->fd_status == FD_HANDLE_INUSE);
* IH_REALLY_CLOSED) or we have too many open files.
*/
if (ihP->ih_flags & IH_REALLY_CLOSED || fdInUseCount > fdCacheSize) {
- IH_UNLOCK
+ IH_UNLOCK;
return fd_reallyclose(fdP);
}
*/
if (ihP->ih_refcnt > 1) {
ihP->ih_refcnt--;
- IH_UNLOCK
+ IH_UNLOCK;
} else {
- IH_UNLOCK
+ IH_UNLOCK;
ih_release(ihP);
}
* Actually close the file descriptor handle and return it to
* the free list.
*/
-int fd_reallyclose(FdHandle_t *fdP)
+int
+fd_reallyclose(FdHandle_t * fdP)
{
FD_t closeFd;
IHandle_t *ihP;
if (!fdP)
return 0;
- IH_LOCK
-
+ IH_LOCK;
assert(ih_Inited);
assert(fdInUseCount > 0);
assert(fdP->fd_status == FD_HANDLE_INUSE);
* has completed its job.
*/
if (!ihP->ih_fdhead) {
- ihP->ih_flags &= ~IH_REALLY_CLOSED;
+ ihP->ih_flags &= ~IH_REALLY_CLOSED;
}
- IH_UNLOCK
+ IH_UNLOCK;
OS_CLOSE(closeFd);
- IH_LOCK
-
+ IH_LOCK;
fdInUseCount -= 1;
/* If this is not the only reference to the Inode then we can decrement
* the reference count, otherwise we need to call ih_release. */
if (ihP->ih_refcnt > 1) {
ihP->ih_refcnt--;
- IH_UNLOCK
+ IH_UNLOCK;
} else {
- IH_UNLOCK
+ IH_UNLOCK;
ih_release(ihP);
}
}
/* Enable buffered I/O on a file descriptor */
-StreamHandle_t *stream_fdopen(FD_t fd)
+StreamHandle_t *
+stream_fdopen(FD_t fd)
{
StreamHandle_t *streamP;
- IH_LOCK
+ IH_LOCK;
if (streamAvailHead == NULL) {
streamHandleAllocateChunk();
}
streamP = streamAvailHead;
DLL_DELETE(streamP, streamAvailHead, streamAvailTail, str_next, str_prev);
- IH_UNLOCK
-
+ IH_UNLOCK;
streamP->str_fd = fd;
streamP->str_buflen = 0;
streamP->str_bufoff = 0;
}
/* Open a file for buffered I/O */
-StreamHandle_t *stream_open(const char *filename, const char *mode)
+StreamHandle_t *
+stream_open(const char *filename, const char *mode)
{
- FD_t fd;
+ FD_t fd = INVALID_FD;
if (strcmp(mode, "r") == 0) {
fd = OS_OPEN(filename, O_RDONLY, 0);
} else if (strcmp(mode, "r+") == 0) {
fd = OS_OPEN(filename, O_RDWR, 0);
} else if (strcmp(mode, "w") == 0) {
- fd = OS_OPEN(filename, O_WRONLY|O_TRUNC|O_CREAT, 0);
+ fd = OS_OPEN(filename, O_WRONLY | O_TRUNC | O_CREAT, 0);
} else if (strcmp(mode, "w+") == 0) {
- fd = OS_OPEN(filename, O_RDWR|O_TRUNC|O_CREAT, 0);
+ fd = OS_OPEN(filename, O_RDWR | O_TRUNC | O_CREAT, 0);
} else if (strcmp(mode, "a") == 0) {
- fd = OS_OPEN(filename, O_WRONLY|O_APPEND|O_CREAT, 0);
+ fd = OS_OPEN(filename, O_WRONLY | O_APPEND | O_CREAT, 0);
} else if (strcmp(mode, "a+") == 0) {
- fd = OS_OPEN(filename, O_RDWR|O_APPEND|O_CREAT, 0);
+ fd = OS_OPEN(filename, O_RDWR | O_APPEND | O_CREAT, 0);
} else {
- assert(FALSE); /* not implemented */
+ assert(FALSE); /* not implemented */
}
if (fd == INVALID_FD) {
}
/* fread for buffered I/O handles */
-int stream_read(void *ptr, int size, int nitems, StreamHandle_t *streamP)
+afs_sfsize_t
+stream_read(void *ptr, afs_fsize_t size, afs_fsize_t nitems,
+ StreamHandle_t * streamP)
{
- int nbytes, bytesRead, bytesToRead;
+ afs_fsize_t nbytes, bytesRead, bytesToRead;
char *p;
/* Need to seek before changing direction */
while (nbytes > 0 && !streamP->str_eof) {
if (streamP->str_buflen == 0) {
streamP->str_bufoff = 0;
- streamP->str_buflen = OS_READ(streamP->str_fd, streamP->str_buffer,
- STREAM_HANDLE_BUFSIZE);
+ streamP->str_buflen =
+ OS_READ(streamP->str_fd, streamP->str_buffer,
+ STREAM_HANDLE_BUFSIZE);
if (streamP->str_buflen < 0) {
streamP->str_error = errno;
streamP->str_buflen = 0;
if (bytesToRead > streamP->str_buflen) {
bytesToRead = streamP->str_buflen;
}
- memcpy(p, streamP->str_buffer+streamP->str_bufoff, bytesToRead);
+ memcpy(p, streamP->str_buffer + streamP->str_bufoff, bytesToRead);
p += bytesToRead;
streamP->str_bufoff += bytesToRead;
streamP->str_buflen -= bytesToRead;
nbytes -= bytesToRead;
}
- return (bytesRead/size);
+ return (bytesRead / size);
}
/* fwrite for buffered I/O handles */
-int stream_write(void *ptr, int size, int nitems, StreamHandle_t *streamP)
+afs_sfsize_t
+stream_write(void *ptr, afs_fsize_t size, afs_fsize_t nitems,
+ StreamHandle_t * streamP)
{
char *p;
- int rc, nbytes, bytesWritten, bytesToWrite;
+ afs_sfsize_t rc;
+ afs_fsize_t nbytes, bytesWritten, bytesToWrite;
/* Need to seek before changing direction */
if (streamP->str_direction == STREAM_DIRECTION_NONE) {
if (bytesToWrite > streamP->str_buflen) {
bytesToWrite = streamP->str_buflen;
}
- memcpy(streamP->str_buffer+streamP->str_bufoff, p, bytesToWrite);
+ memcpy(streamP->str_buffer + streamP->str_bufoff, p, bytesToWrite);
p += bytesToWrite;
streamP->str_bufoff += bytesToWrite;
streamP->str_buflen -= bytesToWrite;
nbytes -= bytesToWrite;
}
- return (bytesWritten/size);
+ return (bytesWritten / size);
}
/* fseek for buffered I/O handles */
-int stream_seek(StreamHandle_t *streamP, int offset, int whence)
+int
+stream_seek(StreamHandle_t * streamP, afs_foff_t offset, int whence)
{
- int rc;
+ ssize_t rc;
int retval = 0;
- if (streamP->str_direction == STREAM_DIRECTION_WRITE &&
- streamP->str_bufoff > 0) {
+ if (streamP->str_direction == STREAM_DIRECTION_WRITE
+ && streamP->str_bufoff > 0) {
rc = OS_WRITE(streamP->str_fd, streamP->str_buffer,
streamP->str_bufoff);
if (rc < 0) {
}
/* fflush for buffered I/O handles */
-int stream_flush(StreamHandle_t *streamP)
+int
+stream_flush(StreamHandle_t * streamP)
{
- int rc;
+ ssize_t rc;
int retval = 0;
- if (streamP->str_direction == STREAM_DIRECTION_WRITE &&
- streamP->str_bufoff > 0) {
+ if (streamP->str_direction == STREAM_DIRECTION_WRITE
+ && streamP->str_bufoff > 0) {
rc = OS_WRITE(streamP->str_fd, streamP->str_buffer,
streamP->str_bufoff);
if (rc < 0) {
}
/* Free a buffered I/O handle */
-int stream_close(StreamHandle_t *streamP, int reallyClose)
+int
+stream_close(StreamHandle_t * streamP, int reallyClose)
{
- int rc;
+ ssize_t rc;
int retval = 0;
assert(streamP != NULL);
- if (streamP->str_direction == STREAM_DIRECTION_WRITE &&
- streamP->str_bufoff > 0) {
+ if (streamP->str_direction == STREAM_DIRECTION_WRITE
+ && streamP->str_bufoff > 0) {
rc = OS_WRITE(streamP->str_fd, streamP->str_buffer,
streamP->str_bufoff);
if (rc < 0) {
}
streamP->str_fd = INVALID_FD;
- IH_LOCK
+ IH_LOCK;
DLL_INSERT_TAIL(streamP, streamAvailHead, streamAvailTail,
str_next, str_prev);
- IH_UNLOCK
-
+ IH_UNLOCK;
return retval;
}
* IH_LOCK. Sets the IH_REALLY_CLOSED flag in the inode handle
* if it fails to close all file handles.
*/
-static int ih_fdclose(IHandle_t *ihP)
+static int
+ih_fdclose(IHandle_t * ihP)
{
int closeCount, closedAll;
FdHandle_t *fdP, *head, *tail, *next;
* can drop the lock before we close the files.
*/
for (fdP = ihP->ih_fdhead; fdP != NULL; fdP = next) {
- next = fdP->fd_ihnext;
- assert(fdP->fd_ih == ihP);
- assert(fdP->fd_status == FD_HANDLE_OPEN ||
- fdP->fd_status == FD_HANDLE_INUSE);
- if (fdP->fd_status == FD_HANDLE_OPEN) {
- DLL_DELETE(fdP, ihP->ih_fdhead, ihP->ih_fdtail,
- fd_ihnext, fd_ihprev);
- DLL_DELETE(fdP, fdLruHead, fdLruTail, fd_next, fd_prev);
- DLL_INSERT_TAIL(fdP, head, tail, fd_next, fd_prev);
- } else {
- closedAll = 0;
- ihP->ih_flags |= IH_REALLY_CLOSED;
- }
+ next = fdP->fd_ihnext;
+ assert(fdP->fd_ih == ihP);
+ assert(fdP->fd_status == FD_HANDLE_OPEN
+ || fdP->fd_status == FD_HANDLE_INUSE);
+ if (fdP->fd_status == FD_HANDLE_OPEN) {
+ DLL_DELETE(fdP, ihP->ih_fdhead, ihP->ih_fdtail, fd_ihnext,
+ fd_ihprev);
+ DLL_DELETE(fdP, fdLruHead, fdLruTail, fd_next, fd_prev);
+ DLL_INSERT_TAIL(fdP, head, tail, fd_next, fd_prev);
+ } else {
+ closedAll = 0;
+ ihP->ih_flags |= IH_REALLY_CLOSED;
+ }
}
/* If the ihandle reference count is 1, we should have
* closed all file descriptors.
*/
if (ihP->ih_refcnt == 1 || closedAll) {
- assert(closedAll);
- assert(!ihP->ih_fdhead);
- assert(!ihP->ih_fdtail);
+ assert(closedAll);
+ assert(!ihP->ih_fdhead);
+ assert(!ihP->ih_fdtail);
}
if (head == NULL) {
- return 0; /* No file descriptors closed */
+ return 0; /* No file descriptors closed */
}
- IH_UNLOCK
-
+ IH_UNLOCK;
/*
* Close the file descriptors
*/
closeCount = 0;
for (fdP = head; fdP != NULL; fdP = fdP->fd_next) {
- OS_CLOSE(fdP->fd_fd);
- fdP->fd_status = FD_HANDLE_AVAIL;
- fdP->fd_fd = INVALID_FD;
- fdP->fd_ih = NULL;
- closeCount++;
+ OS_CLOSE(fdP->fd_fd);
+ fdP->fd_status = FD_HANDLE_AVAIL;
+ fdP->fd_fd = INVALID_FD;
+ fdP->fd_ih = NULL;
+ closeCount++;
}
- IH_LOCK
-
+ IH_LOCK;
assert(fdInUseCount >= closeCount);
fdInUseCount -= closeCount;
* Append the temporary queue to the list of available descriptors
*/
if (fdAvailHead == NULL) {
- fdAvailHead = head;
- fdAvailTail = tail;
+ fdAvailHead = head;
+ fdAvailTail = tail;
} else {
- fdAvailTail->fd_next = head;
- head->fd_prev = fdAvailTail;
- fdAvailTail = tail;
+ fdAvailTail->fd_next = head;
+ head->fd_prev = fdAvailTail;
+ fdAvailTail = tail;
}
return 0;
}
/* Close all cached file descriptors for this inode. */
-int ih_reallyclose(IHandle_t *ihP)
+int
+ih_reallyclose(IHandle_t * ihP)
{
if (!ihP)
- return 0;
+ return 0;
- IH_LOCK
+ IH_LOCK;
+ ihP->ih_refcnt++; /* must not disappear over unlock */
+ if (ihP->ih_synced) {
+ FdHandle_t *fdP;
+ IH_UNLOCK;
+
+ fdP = IH_OPEN(ihP);
+ if (fdP) {
+ OS_SYNC(fdP->fd_fd);
+ FDH_CLOSE(fdP);
+ }
+
+ IH_LOCK;
+ }
assert(ihP->ih_refcnt > 0);
- ih_fdclose(ihP);
+ ihP->ih_synced = 0;
- IH_UNLOCK
+ ih_fdclose(ihP);
+ if (ihP->ih_refcnt > 1) {
+ ihP->ih_refcnt--;
+ IH_UNLOCK;
+ } else {
+ IH_UNLOCK;
+ ih_release(ihP);
+ }
return 0;
}
/* Release an Inode handle. All cached file descriptors for this
* inode are closed when the last reference to this handle is released
*/
-int ih_release(IHandle_t *ihP)
+int
+ih_release(IHandle_t * ihP)
{
int ihash;
if (!ihP)
- return 0;
-
- IH_LOCK
+ return 0;
+ IH_LOCK;
assert(ihP->ih_refcnt > 0);
if (ihP->ih_refcnt > 1) {
- ihP->ih_refcnt--;
- IH_UNLOCK
- return 0;
+ ihP->ih_refcnt--;
+ IH_UNLOCK;
+ return 0;
}
ihash = IH_HASH(ihP->ih_dev, ihP->ih_vid, ihP->ih_ino);
DLL_DELETE(ihP, ihashTable[ihash].ihash_head,
- ihashTable[ihash].ihash_tail, ih_next, ih_prev);
+ ihashTable[ihash].ihash_tail, ih_next, ih_prev);
ih_fdclose(ihP);
DLL_INSERT_TAIL(ihP, ihAvailHead, ihAvailTail, ih_next, ih_prev);
- IH_UNLOCK
-
+ IH_UNLOCK;
return 0;
}
/* Sync an inode to disk if its handle isn't NULL */
-int ih_condsync(IHandle_t *ihP)
+int
+ih_condsync(IHandle_t * ihP)
{
int code;
FdHandle_t *fdP;
return code;
}
+void
+ih_sync_all(void) {
+
+ int ihash;
+
+ IH_LOCK;
+ for (ihash = 0; ihash < I_HANDLE_HASH_SIZE; ihash++) {
+ IHandle_t *ihP, *ihPnext;
+
+ ihP = ihashTable[ihash].ihash_head;
+ if (ihP)
+ ihP->ih_refcnt++; /* must not disappear over unlock */
+ for (; ihP; ihP = ihPnext) {
+
+ if (ihP->ih_synced) {
+ FdHandle_t *fdP;
+
+ ihP->ih_synced = 0;
+ IH_UNLOCK;
+
+ fdP = IH_OPEN(ihP);
+ if (fdP) {
+ OS_SYNC(fdP->fd_fd);
+ FDH_CLOSE(fdP);
+ }
+
+ IH_LOCK;
+ }
+
+ /* when decrementing the refcount, the ihandle might disappear
+ and we might not even be able to proceed to the next one.
+ Hence the gymnastics putting a hold on the next one already */
+ ihPnext = ihP->ih_next;
+ if (ihPnext) ihPnext->ih_refcnt++;
+
+ if (ihP->ih_refcnt > 1) {
+ ihP->ih_refcnt--;
+ } else {
+ IH_UNLOCK;
+ ih_release(ihP);
+ IH_LOCK;
+ }
+
+ }
+ }
+ IH_UNLOCK;
+}
+
+void *
+ih_sync_thread(void *dummy) {
+ while(1) {
+
+#ifdef AFS_PTHREAD_ENV
+ sleep(10);
+#else /* AFS_PTHREAD_ENV */
+ IOMGR_Sleep(60);
+#endif /* AFS_PTHREAD_ENV */
+
+ ih_sync_all();
+ }
+ return NULL;
+}
/*************************************************************************
* OS specific support routines.
*************************************************************************/
#ifndef AFS_NAMEI_ENV
-Inode ih_icreate(IHandle_t *ih, int dev, char *part, Inode nI, int p1, int p2,
- int p3, int p4)
+Inode
+ih_icreate(IHandle_t * ih, int dev, char *part, Inode nI, int p1, int p2,
+ int p3, int p4)
{
Inode ino;
#ifdef AFS_3DISPARES
#ifndef AFS_NT40_ENV
-int ih_size(int fd)
+afs_sfsize_t
+ih_size(int fd)
{
- struct stat status;
- if (fstat(fd, &status)<0)
+ struct afs_stat status;
+ if (afs_fstat(fd, &status) < 0)
return -1;
return status.st_size;
}
git://git.openafs.org / openafs.git / blobdiff