/* * Copyright 2000, International Business Machines Corporation and others. * All Rights Reserved. * * This software has been released under the terms of the IBM Public * License. For details, see the LICENSE file in the top-level source * directory or online at http://www.openafs.org/dl/license10.html */ /* * User space client specific interface glue */ #include #include "afs/param.h" #ifdef UKERNEL #include "afs/sysincludes.h" /* Standard vendor system headers */ #include #include "afsincludes.h" /* Afs-based standard headers */ #include "afs_usrops.h" #include "afs/afs_stats.h" #include "afs/auth.h" #include "afs/cellconfig.h" #include "afs/vice.h" #include "afs/afsutil.h" #include "afs/afs_bypasscache.h" #include "rx/rx_globals.h" #include "afsd/afsd.h" #define VFS 1 #undef VIRTUE #undef VICE #ifndef AFS_CACHE_VNODE_PATH #error You must compile UKERNEL code with -DAFS_CACHE_VNODE_PATH #endif #define CACHEINFOFILE "cacheinfo" #define AFSLOGFILE "AFSLog" #define DCACHEFILE "CacheItems" #define VOLINFOFILE "VolumeItems" #define CELLINFOFILE "CellItems" #define MAXIPADDRS 64 #ifndef MIN #define MIN(A,B) ((A)<(B)?(A):(B)) #endif #ifndef MAX #define MAX(A,B) ((A)>(B)?(A):(B)) #endif extern int cacheDiskType; char afs_LclCellName[64]; static struct usr_vnode *afs_FileTable[MAX_OSI_FILES]; static int afs_FileFlags[MAX_OSI_FILES]; static off_t afs_FileOffsets[MAX_OSI_FILES]; #define MAX_CACHE_LOOPS 4 static struct usr_vfs afs_RootVfs; static struct usr_vnode *afs_RootVnode = NULL; static struct usr_vnode *afs_CurrentDir = NULL; static char afs_mountDir[1024]; /* AFS mount point */ static int afs_mountDirLen; /* strlen of AFS mount point */ struct afsconf_dir *afs_cdir; /* config dir */ int afs_bufferpages = 100; static usr_key_t afs_global_u_key; static struct usr_proc *afs_global_procp = NULL; static struct usr_ucred *afs_global_ucredp = NULL; struct usr_ucred afs_osi_cred, *afs_osi_credp; usr_mutex_t afs_global_lock; usr_thread_t afs_global_owner; usr_mutex_t rx_global_lock; usr_thread_t rx_global_owner; static usr_mutex_t osi_dummy_lock; static usr_mutex_t osi_waitq_lock; static usr_mutex_t osi_authenticate_lock; afs_lock_t afs_ftf; afs_lock_t osi_flplock; afs_lock_t osi_fsplock; /* * Mutex and condition variable used to implement sleep */ pthread_mutex_t usr_sleep_mutex; pthread_cond_t usr_sleep_cond; int call_syscall(long, long, long, long, long, long); int fork_syscall(long, long, long, long, long, long); /* * Hash table mapping addresses onto wait structures for * osi_Sleep/osi_Wakeup and osi_Wait/osi_Wakeup */ typedef struct osi_wait { caddr_t addr; usr_cond_t cond; int flag; struct osi_wait *next; struct osi_wait *prev; time_t expiration; struct osi_wait *timedNext; struct osi_wait *timedPrev; } osi_wait_t; /* * Head of the linked list of available waitq structures. */ static osi_wait_t *osi_waithash_avail; /* * List of timed waits, NSAPI does not provide a cond_timed * wait, so we need to keep track of the timed waits ourselves and * periodically check for expirations */ static osi_wait_t *osi_timedwait_head; static osi_wait_t *osi_timedwait_tail; static struct { osi_wait_t *head; osi_wait_t *tail; } osi_waithash_table[OSI_WAITHASH_SIZE]; /* * Never call afs_brelse */ int ufs_brelse(struct usr_vnode *vp, struct usr_buf *bp) { usr_assert(0); return 0; } /* * I am not sure what to do with these, they assert for now */ int iodone(struct usr_buf *bp) { usr_assert(0); return 0; } struct usr_file * getf(int fd) { usr_assert(0); return 0; } /* * Every user is a super user */ int afs_osi_suser(void *credp) { return 1; } int afs_suser(void *credp) { return 1; } /* * These are no-ops in user space */ void afs_osi_SetTime(osi_timeval_t * atv) { return; } /* * xflock should never fall through, the only files we know * about are AFS files */ int usr_flock(void) { usr_assert(0); return 0; } /* * ioctl should never fall through, the only files we know * about are AFS files */ int usr_ioctl(void) { usr_assert(0); return 0; } /* * We do not support the inode related system calls */ int afs_syscall_icreate(long a, long b, long c, long d, long e, long f) { usr_assert(0); return 0; } int afs_syscall_iincdec(int dev, int inode, int inode_p1, int amount) { usr_assert(0); return 0; } int afs_syscall_iopen(int dev, int inode, int usrmod) { usr_assert(0); return 0; } int afs_syscall_ireadwrite(void) { usr_assert(0); return 0; } /* * these routines are referenced in the vfsops structure, but * should never get called */ int vno_close(void) { usr_assert(0); return 0; } int vno_ioctl(void) { usr_assert(0); return 0; } int vno_rw(void) { usr_assert(0); return 0; } int vno_select(void) { usr_assert(0); return 0; } /* * uiomove copies data between kernel buffers and uio buffers */ int usr_uiomove(char *kbuf, int n, int rw, struct usr_uio *uio) { int nio; int len; char *ptr; struct iovec *iovp; nio = uio->uio_iovcnt; iovp = uio->uio_iov; if (nio <= 0) return EFAULT; /* * copy the data */ ptr = kbuf; while (nio > 0 && n > 0) { len = MIN(n, iovp->iov_len); if (rw == UIO_READ) { memcpy(iovp->iov_base, ptr, len); } else { memcpy(ptr, iovp->iov_base, len); } n -= len; ptr += len; uio->uio_resid -= len; uio->uio_offset += len; iovp->iov_base = (char *)(iovp->iov_base) + len; iovp->iov_len -= len; iovp++; nio--; } if (n > 0) return EFAULT; return 0; } /* * routines to manage user credentials */ struct usr_ucred * usr_crcopy(struct usr_ucred *credp) { struct usr_ucred *newcredp; newcredp = afs_osi_Alloc(sizeof(struct usr_ucred)); *newcredp = *credp; newcredp->cr_ref = 1; return newcredp; } struct usr_ucred * usr_crget(void) { struct usr_ucred *newcredp; newcredp = afs_osi_Alloc(sizeof(struct usr_ucred)); newcredp->cr_ref = 1; return newcredp; } int usr_crfree(struct usr_ucred *credp) { credp->cr_ref--; if (credp->cr_ref == 0) { afs_osi_Free((char *)credp, sizeof(struct usr_ucred)); } return 0; } int usr_crhold(struct usr_ucred *credp) { credp->cr_ref++; return 0; } void usr_vattr_null(struct usr_vattr *vap) { int n; char *cp; n = sizeof(struct usr_vattr); cp = (char *)vap; while (n--) { *cp++ = -1; } } /* * Initialize the thread specific data used to simulate the * kernel environment for each thread. The user structure * is stored in the thread specific data. */ void uafs_InitThread(void) { int st; struct usr_user *uptr; /* * initialize the thread specific user structure. Use malloc to * allocate the data block, so pthread_finish can free the buffer * when this thread terminates. */ uptr = malloc(sizeof(struct usr_user) + sizeof(struct usr_ucred)); usr_assert(uptr != NULL); uptr->u_error = 0; uptr->u_prio = 0; uptr->u_procp = afs_global_procp; uptr->u_cred = (struct usr_ucred *)(uptr + 1); *uptr->u_cred = *afs_global_ucredp; st = usr_setspecific(afs_global_u_key, (void *)uptr); usr_assert(st == 0); } /* * routine to get the user structure from the thread specific data. * this routine is used to implement the global 'u' structure. Initializes * the thread if needed. */ struct usr_user * get_user_struct(void) { struct usr_user *uptr; int st; st = usr_getspecific(afs_global_u_key, &uptr); usr_assert(st == 0); if (uptr == NULL) { uafs_InitThread(); st = usr_getspecific(afs_global_u_key, &uptr); usr_assert(st == 0); usr_assert(uptr != NULL); } return uptr; } /* * Hash an address for the waithash table */ #define WAITHASH(X) \ (((long)(X)^((long)(X)>>4)^((long)(X)<<4))&(OSI_WAITHASH_SIZE-1)) /* * Sleep on an event */ void afs_osi_Sleep(void *x) { int index; osi_wait_t *waitp; int glockOwner = ISAFS_GLOCK(); usr_mutex_lock(&osi_waitq_lock); if (glockOwner) { AFS_GUNLOCK(); } index = WAITHASH(x); if (osi_waithash_avail == NULL) { waitp = afs_osi_Alloc(sizeof(osi_wait_t)); usr_cond_init(&waitp->cond); } else { waitp = osi_waithash_avail; osi_waithash_avail = osi_waithash_avail->next; } waitp->addr = x; waitp->flag = 0; DLL_INSERT_TAIL(waitp, osi_waithash_table[index].head, osi_waithash_table[index].tail, next, prev); waitp->expiration = 0; waitp->timedNext = NULL; waitp->timedPrev = NULL; while (waitp->flag == 0) { usr_cond_wait(&waitp->cond, &osi_waitq_lock); } DLL_DELETE(waitp, osi_waithash_table[index].head, osi_waithash_table[index].tail, next, prev); waitp->next = osi_waithash_avail; osi_waithash_avail = waitp; usr_mutex_unlock(&osi_waitq_lock); if (glockOwner) { AFS_GLOCK(); } } int afs_osi_SleepSig(void *x) { afs_osi_Sleep(x); return 0; } int afs_osi_Wakeup(void *x) { int index; osi_wait_t *waitp; index = WAITHASH(x); usr_mutex_lock(&osi_waitq_lock); waitp = osi_waithash_table[index].head; while (waitp) { if (waitp->addr == x && waitp->flag == 0) { waitp->flag = 1; usr_cond_signal(&waitp->cond); } waitp = waitp->next; } usr_mutex_unlock(&osi_waitq_lock); return 0; } int afs_osi_TimedSleep(void *event, afs_int32 ams, int aintok) { return afs_osi_Wait(ams, event, aintok); } int afs_osi_Wait(afs_int32 msec, struct afs_osi_WaitHandle *handle, int intok) { int index; osi_wait_t *waitp; struct timespec tv; int ret; int glockOwner = ISAFS_GLOCK(); tv.tv_sec = msec / 1000; tv.tv_nsec = (msec % 1000) * 1000000; if (handle == NULL) { if (glockOwner) { AFS_GUNLOCK(); } usr_thread_sleep(&tv); ret = 0; if (glockOwner) { AFS_GLOCK(); } } else { usr_mutex_lock(&osi_waitq_lock); if (glockOwner) { AFS_GUNLOCK(); } index = WAITHASH((caddr_t) handle); if (osi_waithash_avail == NULL) { waitp = afs_osi_Alloc(sizeof(osi_wait_t)); usr_cond_init(&waitp->cond); } else { waitp = osi_waithash_avail; osi_waithash_avail = osi_waithash_avail->next; } waitp->addr = (caddr_t) handle; waitp->flag = 0; DLL_INSERT_TAIL(waitp, osi_waithash_table[index].head, osi_waithash_table[index].tail, next, prev); tv.tv_sec += time(NULL); waitp->expiration = tv.tv_sec + ((tv.tv_nsec == 0) ? 0 : 1); DLL_INSERT_TAIL(waitp, osi_timedwait_head, osi_timedwait_tail, timedNext, timedPrev); usr_cond_wait(&waitp->cond, &osi_waitq_lock); if (waitp->flag) { ret = 2; } else { ret = 0; } DLL_DELETE(waitp, osi_waithash_table[index].head, osi_waithash_table[index].tail, next, prev); DLL_DELETE(waitp, osi_timedwait_head, osi_timedwait_tail, timedNext, timedPrev); waitp->next = osi_waithash_avail; osi_waithash_avail = waitp; usr_mutex_unlock(&osi_waitq_lock); if (glockOwner) { AFS_GLOCK(); } } return ret; } void afs_osi_CancelWait(struct afs_osi_WaitHandle *handle) { afs_osi_Wakeup(handle); } /* * Netscape NSAPI doesn't have a cond_timed_wait, so we need * to explicitly signal cond_timed_waits when their timers expire */ int afs_osi_CheckTimedWaits(void) { time_t curTime; osi_wait_t *waitp; curTime = time(NULL); usr_mutex_lock(&osi_waitq_lock); waitp = osi_timedwait_head; while (waitp != NULL) { usr_assert(waitp->expiration != 0); if (waitp->expiration <= curTime) { waitp->flag = 1; usr_cond_signal(&waitp->cond); } waitp = waitp->timedNext; } usr_mutex_unlock(&osi_waitq_lock); return 0; } /* * 'dummy' vnode, for non-AFS files. We don't actually need most vnode * information for non-AFS files, so point all of them towards this vnode * to save memory. */ static struct usr_vnode dummy_vnode = { 0, /* v_flag */ 1024, /* v_count */ NULL, /* v_op */ NULL, /* v_vfsp */ 0, /* v_type */ 0, /* v_rdev */ NULL /* v_data */ }; /* * Allocate a slot in the file table if there is not one there already, * copy in the file name and kludge up the vnode and inode structures */ int lookupname(char *fnamep, int segflg, int followlink, struct usr_vnode **compvpp) { int code; /* * Assume relative pathnames refer to files in AFS */ if (*fnamep != '/' || uafs_afsPathName(fnamep) != NULL) { AFS_GLOCK(); code = uafs_LookupName(fnamep, afs_CurrentDir, compvpp, 0, 0); AFS_GUNLOCK(); return code; } /* For non-afs files, nobody really looks at the meaningful values in the * returned vnode, so we can return a 'fake' one. The vnode can be held, * released, etc. and some callers check for a NULL vnode anyway, so we * to return something. */ usr_mutex_lock(&osi_dummy_lock); VN_HOLD(&dummy_vnode); usr_mutex_unlock(&osi_dummy_lock); *compvpp = &dummy_vnode; return 0; } /* * open a file given its i-node number */ void * osi_UFSOpen(afs_dcache_id_t *ino) { int rc; struct osi_file *fp; struct stat st; AFS_ASSERT_GLOCK(); AFS_GUNLOCK(); fp = afs_osi_Alloc(sizeof(struct osi_file)); usr_assert(fp != NULL); usr_assert(ino->ufs); fp->fd = open(ino->ufs, O_RDWR | O_CREAT, 0); if (fp->fd < 0) { get_user_struct()->u_error = errno; afs_osi_Free((char *)fp, sizeof(struct osi_file)); AFS_GLOCK(); return NULL; } rc = fstat(fp->fd, &st); if (rc < 0) { get_user_struct()->u_error = errno; afs_osi_Free((void *)fp, sizeof(struct osi_file)); AFS_GLOCK(); return NULL; } fp->size = st.st_size; fp->offset = 0; fp->vnode = (struct usr_vnode *)fp; AFS_GLOCK(); return fp; } int osi_UFSClose(struct osi_file *fp) { int rc; AFS_ASSERT_GLOCK(); AFS_GUNLOCK(); rc = close(fp->fd); if (rc < 0) { get_user_struct()->u_error = errno; afs_osi_Free((void *)fp, sizeof(struct osi_file)); AFS_GLOCK(); return -1; } afs_osi_Free((void *)fp, sizeof(struct osi_file)); AFS_GLOCK(); return 0; } int osi_UFSTruncate(struct osi_file *fp, afs_int32 len) { int rc; AFS_ASSERT_GLOCK(); AFS_GUNLOCK(); rc = ftruncate(fp->fd, len); if (rc < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } fp->size = len; AFS_GLOCK(); return 0; } int afs_osi_Read(struct osi_file *fp, int offset, void *buf, afs_int32 len) { int rc, ret; struct stat st; AFS_ASSERT_GLOCK(); AFS_GUNLOCK(); if (offset >= 0) { rc = lseek(fp->fd, offset, SEEK_SET); } else { rc = lseek(fp->fd, fp->offset, SEEK_SET); } if (rc < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } fp->offset = rc; ret = read(fp->fd, buf, len); if (ret < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } fp->offset += ret; rc = fstat(fp->fd, &st); if (rc < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } fp->size = st.st_size; AFS_GLOCK(); return ret; } int afs_osi_Write(struct osi_file *fp, afs_int32 offset, void *buf, afs_int32 len) { int rc, ret; struct stat st; AFS_ASSERT_GLOCK(); AFS_GUNLOCK(); if (offset >= 0) { rc = lseek(fp->fd, offset, SEEK_SET); } else { rc = lseek(fp->fd, fp->offset, SEEK_SET); } if (rc < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } fp->offset = rc; ret = write(fp->fd, buf, len); if (ret < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } fp->offset += ret; rc = fstat(fp->fd, &st); if (rc < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } fp->size = st.st_size; AFS_GLOCK(); return ret; } int afs_osi_Stat(struct osi_file *fp, struct osi_stat *stp) { int rc; struct stat st; AFS_GUNLOCK(); rc = fstat(fp->fd, &st); if (rc < 0) { get_user_struct()->u_error = errno; AFS_GLOCK(); return -1; } stp->size = st.st_size; stp->mtime = st.st_mtime; stp->atime = st.st_atime; AFS_GLOCK(); return 0; } /* * VOP_RDWR routine */ int afs_osi_VOP_RDWR(struct usr_vnode *vnodeP, struct usr_uio *uioP, int rw, int flags, struct usr_ucred *credP) { int rc; struct osi_file *fp = (struct osi_file *)vnodeP; /* * We don't support readv/writev. */ usr_assert(uioP->uio_iovcnt == 1); usr_assert(uioP->uio_resid == uioP->uio_iov[0].iov_len); if (rw == UIO_WRITE) { usr_assert(uioP->uio_fmode == FWRITE); rc = afs_osi_Write(fp, uioP->uio_offset, uioP->uio_iov[0].iov_base, uioP->uio_iov[0].iov_len); } else { usr_assert(uioP->uio_fmode == FREAD); rc = afs_osi_Read(fp, uioP->uio_offset, uioP->uio_iov[0].iov_base, uioP->uio_iov[0].iov_len); } if (rc < 0) { return get_user_struct()->u_error; } uioP->uio_resid -= rc; uioP->uio_offset += rc; uioP->uio_iov[0].iov_base = (char *)(uioP->uio_iov[0].iov_base) + rc; uioP->uio_iov[0].iov_len -= rc; return 0; } void * afs_osi_Alloc(size_t size) { return malloc(size); } void afs_osi_Free(void *ptr, size_t size) { free(ptr); } void afs_osi_FreeStr(char *ptr) { free(ptr); } void * osi_AllocLargeSpace(size_t size) { AFS_STATCNT(osi_AllocLargeSpace); return afs_osi_Alloc(size); } void osi_FreeLargeSpace(void *ptr) { AFS_STATCNT(osi_FreeLargeSpace); afs_osi_Free(ptr, 0); } void * osi_AllocSmallSpace(size_t size) { AFS_STATCNT(osi_AllocSmallSpace); return afs_osi_Alloc(size); } void osi_FreeSmallSpace(void *ptr) { AFS_STATCNT(osi_FreeSmallSpace); afs_osi_Free(ptr, 0); } void shutdown_osi(void) { AFS_STATCNT(shutdown_osi); return; } void shutdown_osinet(void) { AFS_STATCNT(shutdown_osinet); return; } void shutdown_osifile(void) { AFS_STATCNT(shutdown_osifile); return; } void afs_nfsclient_init(void) { } void shutdown_nfsclnt(void) { return; } void afs_osi_Invisible(void) { return; } void afs_osi_Visible(void) { return; } int osi_GetTime(struct timeval *tv) { gettimeofday(tv, NULL); return 0; } int osi_SetTime(struct timeval *tv) { return 0; } int osi_Active(struct vcache *avc) { AFS_STATCNT(osi_Active); if (avc->opens > 0) return (1); return 0; } int afs_osi_MapStrategy(int (*aproc) (struct usr_buf *), struct usr_buf *bp) { afs_int32 returnCode; returnCode = (*aproc) (bp); return returnCode; } void osi_FlushPages(struct vcache *avc, afs_ucred_t *credp) { ObtainSharedLock(&avc->lock, 555); if ((hcmp((avc->f.m.DataVersion), (avc->mapDV)) <= 0) || ((avc->execsOrWriters > 0) && afs_DirtyPages(avc))) { ReleaseSharedLock(&avc->lock); return; } UpgradeSToWLock(&avc->lock, 565); hset(avc->mapDV, avc->f.m.DataVersion); ReleaseWriteLock(&avc->lock); return; } void osi_FlushText_really(struct vcache *vp) { if (hcmp(vp->f.m.DataVersion, vp->flushDV) > 0) { hset(vp->flushDV, vp->f.m.DataVersion); } return; } int osi_SyncVM(struct vcache *avc) { return 0; } void osi_ReleaseVM(struct vcache *avc, int len, struct usr_ucred *credp) { return; } void osi_Init(void) { int i; int st; /* * Use the thread specific data to implement the user structure */ usr_keycreate(&afs_global_u_key, free); /* * Initialize the global ucred structure */ afs_global_ucredp = (struct usr_ucred *) afs_osi_Alloc(sizeof(struct usr_ucred)); usr_assert(afs_global_ucredp != NULL); afs_global_ucredp->cr_ref = 1; afs_set_cr_uid(afs_global_ucredp, geteuid()); afs_set_cr_gid(afs_global_ucredp, getegid()); afs_set_cr_ruid(afs_global_ucredp, getuid()); afs_set_cr_rgid(afs_global_ucredp, getgid()); afs_global_ucredp->cr_suid = afs_cr_ruid(afs_global_ucredp); afs_global_ucredp->cr_sgid = afs_cr_rgid(afs_global_ucredp); st = getgroups(NGROUPS, &afs_global_ucredp->cr_groups[0]); usr_assert(st >= 0); afs_global_ucredp->cr_ngroups = (unsigned long)st; for (i = st; i < NGROUPS; i++) { afs_global_ucredp->cr_groups[i] = NOGROUP; } /* * Initialize the global process structure */ afs_global_procp = (struct usr_proc *) afs_osi_Alloc(sizeof(struct usr_proc)); usr_assert(afs_global_procp != NULL); afs_global_procp->p_pid = osi_getpid(); afs_global_procp->p_ppid = (pid_t) 1; afs_global_procp->p_ucred = afs_global_ucredp; /* * Initialize the mutex and condition variable used to implement * time sleeps. */ pthread_mutex_init(&usr_sleep_mutex, NULL); pthread_cond_init(&usr_sleep_cond, NULL); /* * Initialize the hash table used for sleep/wakeup */ for (i = 0; i < OSI_WAITHASH_SIZE; i++) { DLL_INIT_LIST(osi_waithash_table[i].head, osi_waithash_table[i].tail); } DLL_INIT_LIST(osi_timedwait_head, osi_timedwait_tail); osi_waithash_avail = NULL; /* * Initialize the AFS file table */ for (i = 0; i < MAX_OSI_FILES; i++) { afs_FileTable[i] = NULL; } /* * Initialize the global locks */ usr_mutex_init(&afs_global_lock); usr_mutex_init(&rx_global_lock); usr_mutex_init(&osi_dummy_lock); usr_mutex_init(&osi_waitq_lock); usr_mutex_init(&osi_authenticate_lock); /* * Initialize the AFS OSI credentials */ afs_osi_cred = *afs_global_ucredp; afs_osi_credp = &afs_osi_cred; init_et_to_sys_error(); } /* * Set the UDP port number RX uses for UDP datagrams */ void uafs_SetRxPort(int port) { usr_assert(usr_rx_port == 0); usr_rx_port = port; } /* * uafs_Init is for backwards compatibility only! Do not use it; use * uafs_Setup, uafs_ParseArgs, and uafs_Run instead. */ void uafs_Init(char *rn, char *mountDirParam, char *confDirParam, char *cacheBaseDirParam, int cacheBlocksParam, int cacheFilesParam, int cacheStatEntriesParam, int dCacheSizeParam, int vCacheSizeParam, int chunkSizeParam, int closeSynchParam, int debugParam, int nDaemonsParam, int cacheFlagsParam, char *logFile) { int code; int argc = 0; char *argv[32]; int freeargc = 0; void *freeargv[32]; char buf[1024]; int i; code = uafs_Setup(mountDirParam); usr_assert(code == 0); argv[argc++] = rn; if (mountDirParam) { argv[argc++] = "-mountdir"; argv[argc++] = mountDirParam; } if (confDirParam) { argv[argc++] = "-confdir"; argv[argc++] = confDirParam; } if (cacheBaseDirParam) { argv[argc++] = "-cachedir"; argv[argc++] = cacheBaseDirParam; } if (cacheBlocksParam) { snprintf(buf, sizeof(buf), "%d", cacheBlocksParam); argv[argc++] = "-blocks"; argv[argc++] = freeargv[freeargc++] = strdup(buf); } if (cacheFilesParam) { snprintf(buf, sizeof(buf), "%d", cacheFilesParam); argv[argc++] = "-files"; argv[argc++] = freeargv[freeargc++] = strdup(buf); } if (cacheStatEntriesParam) { snprintf(buf, sizeof(buf), "%d", cacheStatEntriesParam); argv[argc++] = "-stat"; argv[argc++] = freeargv[freeargc++] = strdup(buf); } if (dCacheSizeParam) { snprintf(buf, sizeof(buf), "%d", dCacheSizeParam); argv[argc++] = "-dcache"; argv[argc++] = freeargv[freeargc++] = strdup(buf); } if (vCacheSizeParam) { snprintf(buf, sizeof(buf), "%d", vCacheSizeParam); argv[argc++] = "-volumes"; argv[argc++] = freeargv[freeargc++] = strdup(buf); } if (chunkSizeParam) { snprintf(buf, sizeof(buf), "%d", chunkSizeParam); argv[argc++] = "-chunksize"; argv[argc++] = freeargv[freeargc++] = strdup(buf); } if (closeSynchParam) { argv[argc++] = "-waitclose"; } if (debugParam) { argv[argc++] = "-debug"; } if (nDaemonsParam) { snprintf(buf, sizeof(buf), "%d", nDaemonsParam); argv[argc++] = "-daemons"; argv[argc++] = freeargv[freeargc++] = strdup(buf); } if (cacheFlagsParam) { if (cacheFlagsParam & AFSCALL_INIT_MEMCACHE) { argv[argc++] = "-memcache"; } } if (logFile) { argv[argc++] = "-logfile"; argv[argc++] = logFile; } argv[argc] = NULL; code = uafs_ParseArgs(argc, argv); usr_assert(code == 0); for (i = 0; i < freeargc; i++) { free(freeargv[i]); } code = uafs_Run(); usr_assert(code == 0); } /** * Calculate the cacheMountDir used for a specified dir. * * @param[in] dir Desired mount dir * @param[out] mountdir On success, contains the literal string that should * be used as the cache mount dir. * @param[in] size The number of bytes allocated in mountdir * * @post On success, mountdir begins with a slash, and does not contain two * slashes adjacent to each other * * @return operation status * @retval 0 success * @retval ENAMETOOLONG the specified dir is too long to fix in the given * mountdir buffer * @retval EINVAL the specified dir does not actually specify any meaningful * mount directory */ static int calcMountDir(const char *dir, char *mountdir, size_t size) { char buf[1024]; char lastchar; char *p; int len; if (dir && strlen(dir) > size-1) { return ENAMETOOLONG; } /* * Initialize the AFS mount point, default is '/afs'. * Strip duplicate/trailing slashes from mount point string. * afs_mountDirLen is set to strlen(afs_mountDir). */ if (!dir) { dir = "afs"; } sprintf(buf, "%s", dir); mountdir[0] = '/'; len = 1; for (lastchar = '/', p = &buf[0]; *p != '\0'; p++) { if (lastchar != '/' || *p != '/') { mountdir[len++] = lastchar = *p; } } if (lastchar == '/' && len > 1) len--; mountdir[len] = '\0'; if (len <= 1) { return EINVAL; } return 0; } void uafs_mount(void) { int rc; /* * Mount the AFS filesystem */ AFS_GLOCK(); rc = afs_mount(&afs_RootVfs, NULL, NULL); usr_assert(rc == 0); rc = afs_root(&afs_RootVfs, &afs_RootVnode); usr_assert(rc == 0); AFS_GUNLOCK(); /* * initialize the current directory to the AFS root */ afs_CurrentDir = afs_RootVnode; VN_HOLD(afs_CurrentDir); return; } void uafs_setMountDir(const char *dir) { if (dir) { int rc; char tmp_mountDir[1024]; rc = calcMountDir(dir, tmp_mountDir, sizeof(tmp_mountDir)); if (rc) { afs_warn("Invalid mount dir specification (error %d): %s\n", rc, dir); } else { if (strcmp(tmp_mountDir, afs_mountDir) != 0) { /* mount dir changed */ strcpy(afs_mountDir, tmp_mountDir); afs_mountDirLen = strlen(afs_mountDir); } } } } int uafs_statvfs(struct statvfs *buf) { int rc; AFS_GLOCK(); rc = afs_statvfs(&afs_RootVfs, buf); AFS_GUNLOCK(); if (rc) { errno = rc; return -1; } return 0; } void uafs_Shutdown(void) { int rc; printf("\n"); AFS_GLOCK(); if (afs_CurrentDir) { VN_RELE(afs_CurrentDir); } rc = afs_unmount(&afs_RootVfs); usr_assert(rc == 0); AFS_GUNLOCK(); printf("\n"); } /* * Donate the current thread to the RX server pool. */ void uafs_RxServerProc(void) { osi_socket sock; int threadID; struct rx_call *newcall = NULL; rxi_MorePackets(2); /* alloc more packets */ threadID = rxi_availProcs++; while (1) { sock = OSI_NULLSOCKET; rxi_ServerProc(threadID, newcall, &sock); if (sock == OSI_NULLSOCKET) { break; } newcall = NULL; threadID = -1; rxi_ListenerProc(sock, &threadID, &newcall); /* assert(threadID != -1); */ /* assert(newcall != NULL); */ } } struct syscallThreadArgs { long syscall; long afscall; long param1; long param2; long param3; long param4; }; void * syscallThread(void *argp) { int i; struct usr_ucred *crp; struct syscallThreadArgs *sysArgsP = (struct syscallThreadArgs *)argp; /* * AFS daemons run authenticated */ get_user_struct()->u_viceid = getuid(); crp = get_user_struct()->u_cred; afs_set_cr_uid(crp, getuid()); afs_set_cr_ruid(crp, getuid()); crp->cr_suid = getuid(); crp->cr_groups[0] = getgid(); crp->cr_ngroups = 1; for (i = 1; i < NGROUPS; i++) { crp->cr_groups[i] = NOGROUP; } call_syscall(sysArgsP->syscall, sysArgsP->afscall, sysArgsP->param1, sysArgsP->param2, sysArgsP->param3, sysArgsP->param4); afs_osi_Free(argp, -1); return 0; } int fork_syscall(long syscall, long afscall, long param1, long param2, long param3, long param4) { usr_thread_t tid; struct syscallThreadArgs *sysArgsP; sysArgsP = (struct syscallThreadArgs *) afs_osi_Alloc(sizeof(struct syscallThreadArgs)); usr_assert(sysArgsP != NULL); sysArgsP->syscall = syscall; sysArgsP->afscall = afscall; sysArgsP->param1 = param1; sysArgsP->param2 = param2; sysArgsP->param3 = param3; sysArgsP->param4 = param4; usr_thread_create(&tid, syscallThread, sysArgsP); usr_thread_detach(tid); return 0; } int call_syscall(long syscall, long afscall, long param1, long param2, long param3, long param4) { int code = 0; struct a { long syscall; long afscall; long parm1; long parm2; long parm3; long parm4; } a; a.syscall = syscall; a.afscall = afscall; a.parm1 = param1; a.parm2 = param2; a.parm3 = param3; a.parm4 = param4; get_user_struct()->u_error = 0; get_user_struct()->u_ap = (char *)&a; code = Afs_syscall(); return code; } int uafs_Setup(const char *mount) { int rc; static int inited = 0; if (inited) { return EEXIST; } inited = 1; rc = calcMountDir(mount, afs_mountDir, sizeof(afs_mountDir)); if (rc) { return rc; } afs_mountDirLen = strlen(afs_mountDir); /* initialize global vars and such */ osi_Init(); /* initialize cache manager foo */ afsd_init(); return 0; } int uafs_ParseArgs(int argc, char **argv) { return afsd_parse(argc, argv); } int uafs_Run(void) { return afsd_run(); } const char * uafs_MountDir(void) { return afsd_cacheMountDir; } int uafs_SetTokens(char *tbuffer, int tlen) { int rc; struct afs_ioctl iob; char outbuf[1024]; iob.in = tbuffer; iob.in_size = tlen; iob.out = &outbuf[0]; iob.out_size = sizeof(outbuf); rc = call_syscall(AFSCALL_PIOCTL, 0, _VICEIOCTL(3), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return 0; } int uafs_RPCStatsEnableProc(void) { int rc; struct afs_ioctl iob; afs_int32 flag; flag = AFSCALL_RXSTATS_ENABLE; iob.in = (char *)&flag; iob.in_size = sizeof(afs_int32); iob.out = NULL; iob.out_size = 0; rc = call_syscall(AFSCALL_PIOCTL, 0, _VICEIOCTL(53), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return rc; } int uafs_RPCStatsDisableProc(void) { int rc; struct afs_ioctl iob; afs_int32 flag; flag = AFSCALL_RXSTATS_DISABLE; iob.in = (char *)&flag; iob.in_size = sizeof(afs_int32); iob.out = NULL; iob.out_size = 0; rc = call_syscall(AFSCALL_PIOCTL, 0, _VICEIOCTL(53), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return rc; } int uafs_RPCStatsClearProc(void) { int rc; struct afs_ioctl iob; afs_int32 flag; flag = AFSCALL_RXSTATS_CLEAR; iob.in = (char *)&flag; iob.in_size = sizeof(afs_int32); iob.out = NULL; iob.out_size = 0; rc = call_syscall(AFSCALL_PIOCTL, 0, _VICEIOCTL(53), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return rc; } int uafs_RPCStatsEnablePeer(void) { int rc; struct afs_ioctl iob; afs_int32 flag; flag = AFSCALL_RXSTATS_ENABLE; iob.in = (char *)&flag; iob.in_size = sizeof(afs_int32); iob.out = NULL; iob.out_size = 0; rc = call_syscall(AFSCALL_PIOCTL, 0, _VICEIOCTL(54), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return rc; } int uafs_RPCStatsDisablePeer(void) { int rc; struct afs_ioctl iob; afs_int32 flag; flag = AFSCALL_RXSTATS_DISABLE; iob.in = (char *)&flag; iob.in_size = sizeof(afs_int32); iob.out = NULL; iob.out_size = 0; rc = call_syscall(AFSCALL_PIOCTL, 0, _VICEIOCTL(54), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return rc; } int uafs_RPCStatsClearPeer(void) { int rc; struct afs_ioctl iob; afs_int32 flag; flag = AFSCALL_RXSTATS_CLEAR; iob.in = (char *)&flag; iob.in_size = sizeof(afs_int32); iob.out = NULL; iob.out_size = 0; rc = call_syscall(AFSCALL_PIOCTL, 0, _VICEIOCTL(54), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return rc; } /* * Lookup the target of a symbolic link * Call VN_HOLD on the output vnode if successful. * Returns zero on success, error code on failure. * If provided, use a path for confirming we are not linked to ourself. * * Note: Caller must hold the AFS global lock. */ static int uafs_LookupLinkPath(struct usr_vnode *vp, struct usr_vnode *parentVp, char *ppathP, struct usr_vnode **vpp) { int code; int len; char *pathP; struct usr_vnode *linkVp; struct usr_uio uio; struct iovec iov[1]; AFS_ASSERT_GLOCK(); pathP = afs_osi_Alloc(MAX_OSI_PATH + 1); usr_assert(pathP != NULL); /* * set up the uio buffer */ iov[0].iov_base = pathP; iov[0].iov_len = MAX_OSI_PATH + 1; uio.uio_iov = &iov[0]; uio.uio_iovcnt = 1; uio.uio_offset = 0; uio.uio_segflg = 0; uio.uio_fmode = FREAD; uio.uio_resid = MAX_OSI_PATH + 1; /* * Read the link data */ code = afs_readlink(VTOAFS(vp), &uio, get_user_struct()->u_cred); if (code) { afs_osi_Free(pathP, MAX_OSI_PATH + 1); return code; } len = MAX_OSI_PATH + 1 - uio.uio_resid; pathP[len] = '\0'; /* are we linked to ourname or ./ourname? ELOOP */ if (ppathP) { if ((strcmp(pathP, ppathP) == 0) || ((pathP[0] == '.') && (pathP[1] == '/') && (strcmp(&(pathP[2]), ppathP) == 0))) { return ELOOP; } } /* * Find the target of the symbolic link */ code = uafs_LookupName(pathP, parentVp, &linkVp, 1, 0); if (code) { afs_osi_Free(pathP, MAX_OSI_PATH + 1); return code; } afs_osi_Free(pathP, MAX_OSI_PATH + 1); *vpp = linkVp; return 0; } /* * Lookup a file or directory given its path. * Call VN_HOLD on the output vnode if successful. * Returns zero on success, error code on failure. * * Note: Caller must hold the AFS global lock. */ int uafs_LookupName(char *path, struct usr_vnode *parentVp, struct usr_vnode **vpp, int follow, int no_eval_mtpt) { int code = 0; int linkCount; struct usr_vnode *vp; struct usr_vnode *nextVp; struct usr_vnode *linkVp; struct vcache *nextVc; char *tmpPath; char *pathP; char *nextPathP = NULL; AFS_ASSERT_GLOCK(); /* * Absolute paths must start with the AFS mount point. */ if (path[0] != '/') { vp = parentVp; } else { path = uafs_afsPathName(path); if (path == NULL) { return ENOENT; } vp = afs_RootVnode; } /* * Loop through the path looking for the new directory */ tmpPath = afs_osi_Alloc(strlen(path) + 1); usr_assert(tmpPath != NULL); strcpy(tmpPath, path); VN_HOLD(vp); pathP = tmpPath; while (pathP != NULL && *pathP != '\0') { usr_assert(*pathP != '/'); /* * terminate the current component and skip over slashes */ nextPathP = afs_strchr(pathP, '/'); if (nextPathP != NULL) { while (*nextPathP == '/') { *(nextPathP++) = '\0'; } } /* * Don't call afs_lookup on non-directories */ if (vp->v_type != VDIR) { VN_RELE(vp); afs_osi_Free(tmpPath, strlen(path) + 1); return ENOTDIR; } if (vp == afs_RootVnode && strcmp(pathP, "..") == 0) { /* * The AFS root is its own parent */ nextVp = afs_RootVnode; } else { /* * We need execute permission to search a directory */ code = afs_access(VTOAFS(vp), VEXEC, get_user_struct()->u_cred); if (code != 0) { VN_RELE(vp); afs_osi_Free(tmpPath, strlen(path) + 1); return code; } /* * lookup the next component in the path, we can release the * subdirectory since we hold the global lock */ nextVc = NULL; nextVp = NULL; if ((nextPathP != NULL && *nextPathP != '\0') || !no_eval_mtpt) code = afs_lookup(VTOAFS(vp), pathP, &nextVc, get_user_struct()->u_cred, 0); else code = afs_lookup(VTOAFS(vp), pathP, &nextVc, get_user_struct()->u_cred, AFS_LOOKUP_NOEVAL); if (nextVc) nextVp=AFSTOV(nextVc); if (code != 0) { VN_RELE(vp); afs_osi_Free(tmpPath, strlen(path) + 1); return code; } } /* * Follow symbolic links for parent directories and * for leaves when the follow flag is set. */ if ((nextPathP != NULL && *nextPathP != '\0') || follow) { linkCount = 0; while (nextVp->v_type == VLNK) { if (++linkCount > MAX_OSI_LINKS) { VN_RELE(vp); VN_RELE(nextVp); afs_osi_Free(tmpPath, strlen(path) + 1); return code; } code = uafs_LookupLinkPath(nextVp, vp, NULL, &linkVp); if (code) { VN_RELE(vp); VN_RELE(nextVp); afs_osi_Free(tmpPath, strlen(path) + 1); return code; } VN_RELE(nextVp); nextVp = linkVp; } } VN_RELE(vp); vp = nextVp; pathP = nextPathP; } /* * Special case, nextPathP is non-null if pathname ends in slash */ if (nextPathP != NULL && vp->v_type != VDIR) { VN_RELE(vp); afs_osi_Free(tmpPath, strlen(path) + 1); return ENOTDIR; } afs_osi_Free(tmpPath, strlen(path) + 1); *vpp = vp; return 0; } int uafs_LookupLink(struct usr_vnode *vp, struct usr_vnode *parentVp, struct usr_vnode **vpp) { return uafs_LookupLinkPath(vp, parentVp, NULL, vpp); } /* * Lookup the parent of a file or directory given its path * Call VN_HOLD on the output vnode if successful. * Returns zero on success, error code on failure. * * Note: Caller must hold the AFS global lock. */ int uafs_LookupParent(char *path, struct usr_vnode **vpp) { int len; int code; char *pathP; struct usr_vnode *parentP; AFS_ASSERT_GLOCK(); /* * Absolute path names must start with the AFS mount point. */ if (*path == '/') { pathP = uafs_afsPathName(path); if (pathP == NULL) { return ENOENT; } } /* * Find the length of the parent path */ len = strlen(path); while (len > 0 && path[len - 1] == '/') { len--; } if (len == 0) { return EINVAL; } while (len > 0 && path[len - 1] != '/') { len--; } if (len == 0) { return EINVAL; } pathP = afs_osi_Alloc(len); usr_assert(pathP != NULL); memcpy(pathP, path, len - 1); pathP[len - 1] = '\0'; /* * look up the parent */ code = uafs_LookupName(pathP, afs_CurrentDir, &parentP, 1, 0); afs_osi_Free(pathP, len); if (code != 0) { return code; } if (parentP->v_type != VDIR) { VN_RELE(parentP); return ENOTDIR; } *vpp = parentP; return 0; } /* * Return a pointer to the first character in the last component * of a pathname */ char * uafs_LastPath(char *path) { int len; len = strlen(path); while (len > 0 && path[len - 1] == '/') { len--; } while (len > 0 && path[len - 1] != '/') { len--; } if (len == 0) { return NULL; } return path + len; } /* * Set the working directory. */ int uafs_chdir(char *path) { int retval; AFS_GLOCK(); retval = uafs_chdir_r(path); AFS_GUNLOCK(); return retval; } int uafs_chdir_r(char *path) { int code; struct vnode *dirP; code = uafs_LookupName(path, afs_CurrentDir, &dirP, 1, 0); if (code != 0) { errno = code; return -1; } if (dirP->v_type != VDIR) { VN_RELE(dirP); errno = ENOTDIR; return -1; } VN_RELE(afs_CurrentDir); afs_CurrentDir = dirP; return 0; } /* * Create a directory. */ int uafs_mkdir(char *path, int mode) { int retval; AFS_GLOCK(); retval = uafs_mkdir_r(path, mode); AFS_GUNLOCK(); return retval; } int uafs_mkdir_r(char *path, int mode) { int code; char *nameP; struct vnode *parentP; struct vcache *dirP; struct usr_vattr attrs; if (uafs_IsRoot(path)) { return EACCES; } /* * Look up the parent directory. */ nameP = uafs_LastPath(path); if (nameP != NULL) { code = uafs_LookupParent(path, &parentP); if (code != 0) { errno = code; return -1; } } else { parentP = afs_CurrentDir; nameP = path; VN_HOLD(parentP); } /* * Make sure the directory has at least one character */ if (*nameP == '\0') { VN_RELE(parentP); errno = EINVAL; return -1; } /* * Create the directory */ usr_vattr_null(&attrs); attrs.va_type = VREG; attrs.va_mode = mode; attrs.va_uid = afs_cr_uid(get_user_struct()->u_cred); attrs.va_gid = afs_cr_gid(get_user_struct()->u_cred); dirP = NULL; code = afs_mkdir(VTOAFS(parentP), nameP, &attrs, &dirP, get_user_struct()->u_cred); VN_RELE(parentP); if (code != 0) { errno = code; return -1; } VN_RELE(AFSTOV(dirP)); return 0; } /* * Return 1 if path is the AFS root, otherwise return 0 */ int uafs_IsRoot(char *path) { while (*path == '/' && *(path + 1) == '/') { path++; } if (strncmp(path, afs_mountDir, afs_mountDirLen) != 0) { return 0; } path += afs_mountDirLen; while (*path == '/') { path++; } if (*path != '\0') { return 0; } return 1; } /* * Open a file * Note: file name may not end in a slash. */ int uafs_open(char *path, int flags, int mode) { int retval; AFS_GLOCK(); retval = uafs_open_r(path, flags, mode); AFS_GUNLOCK(); return retval; } int uafs_open_r(char *path, int flags, int mode) { int fd; int code; int openFlags; int fileMode; struct usr_vnode *fileP; struct usr_vnode *dirP; struct usr_vattr attrs; char *nameP; struct vcache* vc; if (uafs_IsRoot(path)) { fileP = afs_RootVnode; VN_HOLD(fileP); } else { /* * Look up the parent directory. */ nameP = uafs_LastPath(path); if (nameP != NULL) { code = uafs_LookupParent(path, &dirP); if (code != 0) { errno = code; return -1; } } else { dirP = afs_CurrentDir; nameP = path; VN_HOLD(dirP); } /* * Make sure the filename has at least one character */ if (*nameP == '\0') { VN_RELE(dirP); errno = EINVAL; return -1; } /* * Get the VNODE for this file */ if (flags & O_CREAT) { usr_vattr_null(&attrs); attrs.va_type = VREG; attrs.va_mode = mode; attrs.va_uid = afs_cr_uid(get_user_struct()->u_cred); attrs.va_gid = afs_cr_gid(get_user_struct()->u_cred); if (flags & O_TRUNC) { attrs.va_size = 0; } fileP = NULL; vc=VTOAFS(fileP); code = afs_create(VTOAFS(dirP), nameP, &attrs, (flags & O_EXCL) ? usr_EXCL : usr_NONEXCL, mode, &vc, get_user_struct()->u_cred); VN_RELE(dirP); if (code != 0) { errno = code; return -1; } fileP = AFSTOV(vc); } else { fileP = NULL; code = uafs_LookupName(nameP, dirP, &fileP, 1, 0); VN_RELE(dirP); if (code != 0) { errno = code; return -1; } /* * Check whether we have access to this file */ fileMode = 0; if (flags & (O_RDONLY | O_RDWR)) { fileMode |= VREAD; } if (flags & (O_WRONLY | O_RDWR)) { fileMode |= VWRITE; } if (!fileMode) fileMode = VREAD; /* since O_RDONLY is 0 */ code = afs_access(VTOAFS(fileP), fileMode, get_user_struct()->u_cred); if (code != 0) { VN_RELE(fileP); errno = code; return -1; } /* * Get the file attributes, all we need is the size */ code = afs_getattr(VTOAFS(fileP), &attrs, get_user_struct()->u_cred); if (code != 0) { VN_RELE(fileP); errno = code; return -1; } } } /* * Setup the open flags */ openFlags = 0; if (flags & O_TRUNC) { openFlags |= FTRUNC; } if (flags & O_APPEND) { openFlags |= FAPPEND; } if (flags & O_SYNC) { openFlags |= FSYNC; } if (flags & O_SYNC) { openFlags |= FSYNC; } if (flags & (O_RDONLY | O_RDWR)) { openFlags |= FREAD; } if (flags & (O_WRONLY | O_RDWR)) { openFlags |= FWRITE; } if ((openFlags & (FREAD | FWRITE)) == 0) { /* O_RDONLY is 0, so ... */ openFlags |= FREAD; } /* * Truncate if necessary */ if ((flags & O_TRUNC) && (attrs.va_size != 0)) { usr_vattr_null(&attrs); attrs.va_mask = ATTR_SIZE; attrs.va_size = 0; code = afs_setattr(VTOAFS(fileP), &attrs, get_user_struct()->u_cred); if (code != 0) { VN_RELE(fileP); errno = code; return -1; } } vc=VTOAFS(fileP); /* * do the open */ code = afs_open(&vc, openFlags, get_user_struct()->u_cred); if (code != 0) { VN_RELE(fileP); errno = code; return -1; } /* * Put the vnode pointer into the file table */ for (fd = 0; fd < MAX_OSI_FILES; fd++) { if (afs_FileTable[fd] == NULL) { afs_FileTable[fd] = fileP; afs_FileFlags[fd] = openFlags; if (flags & O_APPEND) { afs_FileOffsets[fd] = attrs.va_size; } else { afs_FileOffsets[fd] = 0; } break; } } if (fd == MAX_OSI_FILES) { VN_RELE(fileP); errno = ENFILE; return -1; } return fd; } /* * Create a file */ int uafs_creat(char *path, int mode) { int rc; rc = uafs_open(path, O_CREAT | O_WRONLY | O_TRUNC, mode); return rc; } int uafs_creat_r(char *path, int mode) { int rc; rc = uafs_open_r(path, O_CREAT | O_WRONLY | O_TRUNC, mode); return rc; } /* * Write to a file */ int uafs_write(int fd, char *buf, int len) { int retval; AFS_GLOCK(); retval = uafs_pwrite_r(fd, buf, len, afs_FileOffsets[fd]); AFS_GUNLOCK(); return retval; } int uafs_pwrite(int fd, char *buf, int len, off_t offset) { int retval; AFS_GLOCK(); retval = uafs_pwrite_r(fd, buf, len, offset); AFS_GUNLOCK(); return retval; } int uafs_pwrite_r(int fd, char *buf, int len, off_t offset) { int code; struct usr_uio uio; struct iovec iov[1]; struct usr_vnode *fileP; /* * Make sure this is an open file */ fileP = afs_FileTable[fd]; if (fileP == NULL) { errno = EBADF; return -1; } /* * set up the uio buffer */ iov[0].iov_base = buf; iov[0].iov_len = len; uio.uio_iov = &iov[0]; uio.uio_iovcnt = 1; uio.uio_offset = offset; uio.uio_segflg = 0; uio.uio_fmode = FWRITE; uio.uio_resid = len; /* * do the write */ code = afs_write(VTOAFS(fileP), &uio, afs_FileFlags[fd], get_user_struct()->u_cred, 0); if (code) { errno = code; return -1; } afs_FileOffsets[fd] = uio.uio_offset; return (len - uio.uio_resid); } /* * Read from a file */ int uafs_read(int fd, char *buf, int len) { int retval; AFS_GLOCK(); retval = uafs_pread_r(fd, buf, len, afs_FileOffsets[fd]); AFS_GUNLOCK(); return retval; } int uafs_pread_nocache(int fd, char *buf, int len, off_t offset) { int retval; AFS_GLOCK(); retval = uafs_pread_nocache_r(fd, buf, len, offset); AFS_GUNLOCK(); return retval; } int uafs_pread_nocache_r(int fd, char *buf, int len, off_t offset) { int code; struct iovec iov[1]; struct usr_vnode *fileP; struct nocache_read_request *bparms; struct usr_uio uio; /* * Make sure this is an open file */ fileP = afs_FileTable[fd]; if (fileP == NULL) { errno = EBADF; return -1; } /* these get freed in PrefetchNoCache, so... */ bparms = afs_osi_Alloc(sizeof(struct nocache_read_request)); code = afs_CreateReq(&bparms->areq, get_user_struct()->u_cred); if (code) { afs_DestroyReq(bparms->areq); afs_osi_Free(bparms, sizeof(struct nocache_read_request)); errno = code; return -1; } bparms->auio = &uio; bparms->offset = offset; bparms->length = len; /* * set up the uio buffer */ iov[0].iov_base = buf; iov[0].iov_len = len; uio.uio_iov = &iov[0]; uio.uio_iovcnt = 1; uio.uio_offset = offset; uio.uio_segflg = 0; uio.uio_fmode = FREAD; uio.uio_resid = len; /* * do the read */ code = afs_PrefetchNoCache(VTOAFS(fileP), get_user_struct()->u_cred, bparms); if (code) { errno = code; return -1; } afs_FileOffsets[fd] = uio.uio_offset; return (len - uio.uio_resid); } int uafs_pread(int fd, char *buf, int len, off_t offset) { int retval; AFS_GLOCK(); retval = uafs_pread_r(fd, buf, len, offset); AFS_GUNLOCK(); return retval; } int uafs_pread_r(int fd, char *buf, int len, off_t offset) { int code; struct usr_uio uio; struct iovec iov[1]; struct usr_vnode *fileP; /* * Make sure this is an open file */ fileP = afs_FileTable[fd]; if (fileP == NULL) { errno = EBADF; return -1; } /* * set up the uio buffer */ iov[0].iov_base = buf; iov[0].iov_len = len; uio.uio_iov = &iov[0]; uio.uio_iovcnt = 1; uio.uio_offset = offset; uio.uio_segflg = 0; uio.uio_fmode = FREAD; uio.uio_resid = len; /* * do the read */ code = afs_read(VTOAFS(fileP), &uio, get_user_struct()->u_cred, 0); if (code) { errno = code; return -1; } afs_FileOffsets[fd] = uio.uio_offset; return (len - uio.uio_resid); } /* * Copy the attributes of a file into a stat structure. * * NOTE: Caller must hold the global AFS lock. */ int uafs_GetAttr(struct usr_vnode *vp, struct stat *stats) { int code; struct usr_vattr attrs; AFS_ASSERT_GLOCK(); /* * Get the attributes */ code = afs_getattr(VTOAFS(vp), &attrs, get_user_struct()->u_cred); if (code != 0) { return code; } /* * Copy the attributes, zero fields that aren't set */ memset((void *)stats, 0, sizeof(struct stat)); stats->st_dev = -1; stats->st_ino = attrs.va_nodeid; stats->st_mode = attrs.va_mode; stats->st_nlink = attrs.va_nlink; stats->st_uid = attrs.va_uid; stats->st_gid = attrs.va_gid; stats->st_rdev = attrs.va_rdev; stats->st_size = attrs.va_size; stats->st_atime = attrs.va_atime.tv_sec; stats->st_mtime = attrs.va_mtime.tv_sec; stats->st_ctime = attrs.va_ctime.tv_sec; /* preserve dv if possible */ #if defined(HAVE_STRUCT_STAT_ST_CTIMESPEC) stats->st_atimespec.tv_nsec = attrs.va_atime.tv_usec * 1000; stats->st_mtimespec.tv_nsec = attrs.va_mtime.tv_usec * 1000; stats->st_ctimespec.tv_nsec = attrs.va_ctime.tv_usec * 1000; #elif defined(HAVE_STRUCT_STAT_ST_CTIMENSEC) stats->st_atimensec = attrs.va_atime.tv_usec * 1000; stats->st_mtimensec = attrs.va_mtime.tv_usec * 1000; stats->st_ctimensec = attrs.va_ctime.tv_usec * 1000; #endif stats->st_blksize = attrs.va_blocksize; stats->st_blocks = attrs.va_blocks; return 0; } /* * Get the attributes of a file, do follow links */ int uafs_stat(char *path, struct stat *buf) { int retval; AFS_GLOCK(); retval = uafs_stat_r(path, buf); AFS_GUNLOCK(); return retval; } int uafs_stat_r(char *path, struct stat *buf) { int code; struct vnode *vp; code = uafs_LookupName(path, afs_CurrentDir, &vp, 1, 0); if (code != 0) { errno = code; return -1; } code = uafs_GetAttr(vp, buf); VN_RELE(vp); if (code) { errno = code; return -1; } return 0; } /* * Get the attributes of a file, don't follow links */ int uafs_lstat(char *path, struct stat *buf) { int retval; AFS_GLOCK(); retval = uafs_lstat_r(path, buf); AFS_GUNLOCK(); return retval; } int uafs_lstat_r(char *path, struct stat *buf) { int code; struct vnode *vp; code = uafs_LookupName(path, afs_CurrentDir, &vp, 0, 0); if (code != 0) { errno = code; return -1; } code = uafs_GetAttr(vp, buf); VN_RELE(vp); if (code) { errno = code; return -1; } return 0; } /* * Get the attributes of an open file */ int uafs_fstat(int fd, struct stat *buf) { int retval; AFS_GLOCK(); retval = uafs_fstat_r(fd, buf); AFS_GUNLOCK(); return retval; } int uafs_fstat_r(int fd, struct stat *buf) { int code; struct vnode *vp; vp = afs_FileTable[fd]; if (vp == NULL) { errno = EBADF; return -1; } code = uafs_GetAttr(vp, buf); if (code) { errno = code; return -1; } return 0; } /* * change the permissions on a file */ int uafs_chmod(char *path, int mode) { int retval; AFS_GLOCK(); retval = uafs_chmod_r(path, mode); AFS_GUNLOCK(); return retval; } int uafs_chmod_r(char *path, int mode) { int code; struct vnode *vp; struct usr_vattr attrs; code = uafs_LookupName(path, afs_CurrentDir, &vp, 1, 0); if (code != 0) { errno = code; return -1; } usr_vattr_null(&attrs); attrs.va_mask = ATTR_MODE; attrs.va_mode = mode; code = afs_setattr(VTOAFS(vp), &attrs, get_user_struct()->u_cred); VN_RELE(vp); if (code != 0) { errno = code; return -1; } return 0; } /* * change the permissions on an open file */ int uafs_fchmod(int fd, int mode) { int retval; AFS_GLOCK(); retval = uafs_fchmod_r(fd, mode); AFS_GUNLOCK(); return retval; } int uafs_fchmod_r(int fd, int mode) { int code; struct vnode *vp; struct usr_vattr attrs; vp = afs_FileTable[fd]; if (vp == NULL) { errno = EBADF; return -1; } usr_vattr_null(&attrs); attrs.va_mask = ATTR_MODE; attrs.va_mode = mode; code = afs_setattr(VTOAFS(vp), &attrs, get_user_struct()->u_cred); if (code != 0) { errno = code; return -1; } return 0; } /* * truncate a file */ int uafs_truncate(char *path, int length) { int retval; AFS_GLOCK(); retval = uafs_truncate_r(path, length); AFS_GUNLOCK(); return retval; } int uafs_truncate_r(char *path, int length) { int code; struct vnode *vp; struct usr_vattr attrs; code = uafs_LookupName(path, afs_CurrentDir, &vp, 1, 0); if (code != 0) { errno = code; return -1; } usr_vattr_null(&attrs); attrs.va_mask = ATTR_SIZE; attrs.va_size = length; code = afs_setattr(VTOAFS(vp), &attrs, get_user_struct()->u_cred); VN_RELE(vp); if (code != 0) { errno = code; return -1; } return 0; } /* * truncate an open file */ int uafs_ftruncate(int fd, int length) { int retval; AFS_GLOCK(); retval = uafs_ftruncate_r(fd, length); AFS_GUNLOCK(); return retval; } int uafs_ftruncate_r(int fd, int length) { int code; struct vnode *vp; struct usr_vattr attrs; vp = afs_FileTable[fd]; if (vp == NULL) { errno = EBADF; return -1; } usr_vattr_null(&attrs); attrs.va_mask = ATTR_SIZE; attrs.va_size = length; code = afs_setattr(VTOAFS(vp), &attrs, get_user_struct()->u_cred); if (code != 0) { errno = code; return -1; } return 0; } /* * set the read/write file pointer of an open file */ int uafs_lseek(int fd, int offset, int whence) { int retval; AFS_GLOCK(); retval = uafs_lseek_r(fd, offset, whence); AFS_GUNLOCK(); return retval; } int uafs_lseek_r(int fd, int offset, int whence) { int code; int newpos; struct usr_vattr attrs; struct usr_vnode *vp; vp = afs_FileTable[fd]; if (vp == NULL) { errno = EBADF; return -1; } switch (whence) { case SEEK_CUR: newpos = afs_FileOffsets[fd] + offset; break; case SEEK_SET: newpos = offset; break; case SEEK_END: code = afs_getattr(VTOAFS(vp), &attrs, get_user_struct()->u_cred); if (code != 0) { errno = code; return -1; } newpos = attrs.va_size + offset; break; default: errno = EINVAL; return -1; } if (newpos < 0) { errno = EINVAL; return -1; } afs_FileOffsets[fd] = newpos; return newpos; } /* * sync a file */ int uafs_fsync(int fd) { int retval; AFS_GLOCK(); retval = uafs_fsync_r(fd); AFS_GUNLOCK(); return retval; } int uafs_fsync_r(int fd) { int code; struct usr_vnode *fileP; fileP = afs_FileTable[fd]; if (fileP == NULL) { errno = EBADF; return -1; } code = afs_fsync(VTOAFS(fileP), get_user_struct()->u_cred); if (code != 0) { errno = code; return -1; } return 0; } /* * Close a file */ int uafs_close(int fd) { int retval; AFS_GLOCK(); retval = uafs_close_r(fd); AFS_GUNLOCK(); return retval; } int uafs_close_r(int fd) { int code; struct usr_vnode *fileP; fileP = afs_FileTable[fd]; if (fileP == NULL) { errno = EBADF; return -1; } afs_FileTable[fd] = NULL; code = afs_close(VTOAFS(fileP), afs_FileFlags[fd], get_user_struct()->u_cred); VN_RELE(fileP); if (code != 0) { errno = code; return -1; } return 0; } /* * Create a hard link from the source to the target * Note: file names may not end in a slash. */ int uafs_link(char *existing, char *new) { int retval; AFS_GLOCK(); retval = uafs_link_r(existing, new); AFS_GUNLOCK(); return retval; } int uafs_link_r(char *existing, char *new) { int code; struct usr_vnode *existP; struct usr_vnode *dirP; char *nameP; if (uafs_IsRoot(new)) { return EACCES; } /* * Look up the existing node. */ code = uafs_LookupName(existing, afs_CurrentDir, &existP, 1, 0); if (code != 0) { errno = code; return -1; } /* * Look up the parent directory. */ nameP = uafs_LastPath(new); if (nameP != NULL) { code = uafs_LookupParent(new, &dirP); if (code != 0) { VN_RELE(existP); errno = code; return -1; } } else { dirP = afs_CurrentDir; nameP = new; VN_HOLD(dirP); } /* * Make sure the filename has at least one character */ if (*nameP == '\0') { VN_RELE(existP); VN_RELE(dirP); errno = EINVAL; return -1; } /* * Create the link */ code = afs_link(VTOAFS(existP), VTOAFS(dirP), nameP, get_user_struct()->u_cred); VN_RELE(existP); VN_RELE(dirP); if (code != 0) { errno = code; return -1; } return 0; } /* * Create a symbolic link from the source to the target * Note: file names may not end in a slash. */ int uafs_symlink(char *target, char *source) { int retval; AFS_GLOCK(); retval = uafs_symlink_r(target, source); AFS_GUNLOCK(); return retval; } int uafs_symlink_r(char *target, char *source) { int code; struct usr_vnode *dirP; struct usr_vattr attrs; char *nameP; if (uafs_IsRoot(source)) { return EACCES; } /* * Look up the parent directory. */ nameP = uafs_LastPath(source); if (nameP != NULL) { code = uafs_LookupParent(source, &dirP); if (code != 0) { errno = code; return -1; } } else { dirP = afs_CurrentDir; nameP = source; VN_HOLD(dirP); } /* * Make sure the filename has at least one character */ if (*nameP == '\0') { VN_RELE(dirP); errno = EINVAL; return -1; } /* * Create the link */ usr_vattr_null(&attrs); attrs.va_type = VLNK; attrs.va_mode = 0777; attrs.va_uid = afs_cr_uid(get_user_struct()->u_cred); attrs.va_gid = afs_cr_gid(get_user_struct()->u_cred); code = afs_symlink(VTOAFS(dirP), nameP, &attrs, target, NULL, get_user_struct()->u_cred); VN_RELE(dirP); if (code != 0) { errno = code; return -1; } return 0; } /* * Read a symbolic link into the buffer */ int uafs_readlink(char *path, char *buf, int len) { int retval; AFS_GLOCK(); retval = uafs_readlink_r(path, buf, len); AFS_GUNLOCK(); return retval; } int uafs_readlink_r(char *path, char *buf, int len) { int code; struct usr_vnode *vp; struct usr_uio uio; struct iovec iov[1]; code = uafs_LookupName(path, afs_CurrentDir, &vp, 0, 0); if (code != 0) { errno = code; return -1; } if (vp->v_type != VLNK) { VN_RELE(vp); errno = EINVAL; return -1; } /* * set up the uio buffer */ iov[0].iov_base = buf; iov[0].iov_len = len; uio.uio_iov = &iov[0]; uio.uio_iovcnt = 1; uio.uio_offset = 0; uio.uio_segflg = 0; uio.uio_fmode = FREAD; uio.uio_resid = len; /* * Read the the link */ code = afs_readlink(VTOAFS(vp), &uio, get_user_struct()->u_cred); VN_RELE(vp); if (code) { errno = code; return -1; } /* * return the number of bytes read */ return (len - uio.uio_resid); } /* * Remove a file (or directory) * Note: file name may not end in a slash. */ int uafs_unlink(char *path) { int retval; AFS_GLOCK(); retval = uafs_unlink_r(path); AFS_GUNLOCK(); return retval; } int uafs_unlink_r(char *path) { int code; struct usr_vnode *dirP; char *nameP; if (uafs_IsRoot(path)) { return EACCES; } /* * Look up the parent directory. */ nameP = uafs_LastPath(path); if (nameP != NULL) { code = uafs_LookupParent(path, &dirP); if (code != 0) { errno = code; return -1; } } else { dirP = afs_CurrentDir; nameP = path; VN_HOLD(dirP); } /* * Make sure the filename has at least one character */ if (*nameP == '\0') { VN_RELE(dirP); errno = EINVAL; return -1; } /* * Remove the file */ code = afs_remove(VTOAFS(dirP), nameP, get_user_struct()->u_cred); VN_RELE(dirP); if (code != 0) { errno = code; return -1; } return 0; } /* * Rename a file (or directory) */ int uafs_rename(char *old, char *new) { int retval; AFS_GLOCK(); retval = uafs_rename_r(old, new); AFS_GUNLOCK(); return retval; } int uafs_rename_r(char *old, char *new) { int code; char *onameP; char *nnameP; struct usr_vnode *odirP; struct usr_vnode *ndirP; if (uafs_IsRoot(new)) { return EACCES; } /* * Look up the parent directories. */ onameP = uafs_LastPath(old); if (onameP != NULL) { code = uafs_LookupParent(old, &odirP); if (code != 0) { errno = code; return -1; } } else { odirP = afs_CurrentDir; onameP = old; VN_HOLD(odirP); } nnameP = uafs_LastPath(new); if (nnameP != NULL) { code = uafs_LookupParent(new, &ndirP); if (code != 0) { errno = code; return -1; } } else { ndirP = afs_CurrentDir; nnameP = new; VN_HOLD(ndirP); } /* * Make sure the filename has at least one character */ if (*onameP == '\0' || *nnameP == '\0') { VN_RELE(odirP); VN_RELE(ndirP); errno = EINVAL; return -1; } /* * Rename the file */ code = afs_rename(VTOAFS(odirP), onameP, VTOAFS(ndirP), nnameP, get_user_struct()->u_cred); VN_RELE(odirP); VN_RELE(ndirP); if (code != 0) { errno = code; return -1; } return 0; } /* * Remove a or directory * Note: file name may not end in a slash. */ int uafs_rmdir(char *path) { int retval; AFS_GLOCK(); retval = uafs_rmdir_r(path); AFS_GUNLOCK(); return retval; } int uafs_rmdir_r(char *path) { int code; struct usr_vnode *dirP; char *nameP; if (uafs_IsRoot(path)) { return EACCES; } /* * Look up the parent directory. */ nameP = uafs_LastPath(path); if (nameP != NULL) { code = uafs_LookupParent(path, &dirP); if (code != 0) { errno = code; return -1; } } else { dirP = afs_CurrentDir; nameP = path; VN_HOLD(dirP); } /* * Make sure the directory name has at least one character */ if (*nameP == '\0') { VN_RELE(dirP); errno = EINVAL; return -1; } /* * Remove the directory */ code = afs_rmdir(VTOAFS(dirP), nameP, get_user_struct()->u_cred); VN_RELE(dirP); if (code != 0) { errno = code; return -1; } return 0; } /* * Flush a file from the AFS cache */ int uafs_FlushFile(char *path) { int code; struct afs_ioctl iob; iob.in = NULL; iob.in_size = 0; iob.out = NULL; iob.out_size = 0; code = call_syscall(AFSCALL_PIOCTL, (long)path, _VICEIOCTL(6), (long)&iob, 0, 0); if (code != 0) { errno = code; return -1; } return 0; } int uafs_FlushFile_r(char *path) { int retval; AFS_GUNLOCK(); retval = uafs_FlushFile(path); AFS_GLOCK(); return retval; } /* * open a directory */ usr_DIR * uafs_opendir(char *path) { usr_DIR *retval; AFS_GLOCK(); retval = uafs_opendir_r(path); AFS_GUNLOCK(); return retval; } usr_DIR * uafs_opendir_r(char *path) { usr_DIR *dirp; struct usr_vnode *fileP; int fd; /* * Open the directory for reading */ fd = uafs_open_r(path, O_RDONLY, 0); if (fd < 0) { return NULL; } fileP = afs_FileTable[fd]; if (fileP == NULL) { return NULL; } if (fileP->v_type != VDIR) { uafs_close_r(fd); errno = ENOTDIR; return NULL; } /* * Set up the directory structures */ dirp = afs_osi_Alloc(sizeof(usr_DIR) + USR_DIRSIZE + sizeof(struct usr_dirent)); usr_assert(dirp != NULL); dirp->dd_buf = (char *)(dirp + 1); dirp->dd_fd = fd; dirp->dd_loc = 0; dirp->dd_size = 0; errno = 0; return dirp; } /* * Read directory entries into a file system independent format. * This routine was developed to support AFS cache consistency testing. * You should use uafs_readdir instead. */ int uafs_getdents(int fd, struct min_direct *buf, int len) { int retval; AFS_GLOCK(); retval = uafs_getdents_r(fd, buf, len); AFS_GUNLOCK(); return retval; } int uafs_getdents_r(int fd, struct min_direct *buf, int len) { int code; struct usr_uio uio; struct usr_vnode *vp; struct iovec iov[1]; /* * Make sure this is an open file */ vp = afs_FileTable[fd]; if (vp == NULL) { AFS_GUNLOCK(); errno = EBADF; return -1; } /* * set up the uio buffer */ iov[0].iov_base = (char *)buf; iov[0].iov_len = len; uio.uio_iov = &iov[0]; uio.uio_iovcnt = 1; uio.uio_offset = afs_FileOffsets[fd]; uio.uio_segflg = 0; uio.uio_fmode = FREAD; uio.uio_resid = len; /* * read the next chunk from the directory */ code = afs_readdir(VTOAFS(vp), &uio, get_user_struct()->u_cred); if (code != 0) { errno = code; return -1; } afs_FileOffsets[fd] = uio.uio_offset; return (len - uio.uio_resid); } /* * read from a directory (names only) */ struct usr_dirent * uafs_readdir(usr_DIR * dirp) { struct usr_dirent *retval; AFS_GLOCK(); retval = uafs_readdir_r(dirp); AFS_GUNLOCK(); return retval; } struct usr_dirent * uafs_readdir_r(usr_DIR * dirp) { int code; int len; struct usr_uio uio; struct usr_vnode *vp; struct iovec iov[1]; struct usr_dirent *direntP; struct min_direct *directP; if (!dirp) { errno = EBADF; return NULL; } /* * Make sure this is an open file */ vp = afs_FileTable[dirp->dd_fd]; if (vp == NULL) { errno = EBADF; return NULL; } /* * If there are no entries in the stream buffer * then read another chunk */ directP = (struct min_direct *)(dirp->dd_buf + dirp->dd_loc); if (dirp->dd_size == 0 || directP->d_fileno == 0) { /* * set up the uio buffer */ iov[0].iov_base = dirp->dd_buf; iov[0].iov_len = USR_DIRSIZE; uio.uio_iov = &iov[0]; uio.uio_iovcnt = 1; uio.uio_offset = afs_FileOffsets[dirp->dd_fd]; uio.uio_segflg = 0; uio.uio_fmode = FREAD; uio.uio_resid = USR_DIRSIZE; /* * read the next chunk from the directory */ code = afs_readdir(VTOAFS(vp), &uio, get_user_struct()->u_cred); if (code != 0) { errno = code; return NULL; } afs_FileOffsets[dirp->dd_fd] = uio.uio_offset; dirp->dd_size = USR_DIRSIZE - iov[0].iov_len; dirp->dd_loc = 0; directP = (struct min_direct *)(dirp->dd_buf + dirp->dd_loc); } /* * Check for end of file */ if (dirp->dd_size == 0 || directP->d_fileno == 0) { errno = 0; return NULL; } len = ((sizeof(struct min_direct) + directP->d_namlen + 4) & (~3)); usr_assert(len <= dirp->dd_size); /* * Copy the next entry into the usr_dirent structure and advance */ direntP = (struct usr_dirent *)(dirp->dd_buf + USR_DIRSIZE); direntP->d_ino = directP->d_fileno; direntP->d_off = direntP->d_reclen; direntP->d_reclen = sizeof(struct usr_dirent) - MAXNAMLEN + directP->d_namlen + 1; memcpy(&direntP->d_name[0], (void *)(directP + 1), directP->d_namlen); direntP->d_name[directP->d_namlen] = '\0'; dirp->dd_loc += len; dirp->dd_size -= len; return direntP; } /* * Close a directory */ int uafs_closedir(usr_DIR * dirp) { int retval; AFS_GLOCK(); retval = uafs_closedir_r(dirp); AFS_GUNLOCK(); return retval; } int uafs_closedir_r(usr_DIR * dirp) { int fd; int rc; if (!dirp) { errno = EBADF; return -1; } fd = dirp->dd_fd; afs_osi_Free((char *)dirp, sizeof(usr_DIR) + USR_DIRSIZE + sizeof(struct usr_dirent)); rc = uafs_close_r(fd); return rc; } /* * Destroy AFS credentials from the kernel cache */ int uafs_unlog(void) { int code; usr_mutex_lock(&osi_authenticate_lock); code = ktc_ForgetAllTokens(); usr_mutex_unlock(&osi_authenticate_lock); return code; } int uafs_unlog_r(void) { int retval; AFS_GUNLOCK(); retval = uafs_unlog(); AFS_GLOCK(); return retval; } /* * Strip the AFS mount point from a pathname string. Return * NULL if the path is a relative pathname or if the path * doesn't start with the AFS mount point string. */ char * uafs_afsPathName(char *path) { char *p; char lastchar; int i; if (path[0] != '/') return NULL; lastchar = '/'; for (i = 1, p = path + 1; *p != '\0'; p++) { /* Ignore duplicate slashes */ if (*p == '/' && lastchar == '/') continue; /* Is this a subdirectory of the AFS mount point? */ if (afs_mountDir[i] == '\0' && *p == '/') { /* strip leading slashes */ while (*(++p) == '/'); return p; } /* Reject paths that are not within AFS */ if (*p != afs_mountDir[i]) return NULL; lastchar = *p; i++; } /* Is this the AFS mount point? */ if (afs_mountDir[i] == '\0') { usr_assert(*p == '\0'); return p; } return NULL; } /* * uafs_getcellstatus * get the cell status */ int uafs_getcellstatus(char *cell, afs_int32 * status) { int rc; struct afs_ioctl iob; iob.in = cell; iob.in_size = strlen(cell) + 1; iob.out = 0; iob.out_size = 0; rc = call_syscall(AFSCALL_PIOCTL, /*path */ 0, _VICEIOCTL(35), (long)&iob, 0, 0); if (rc < 0) { errno = rc; return -1; } *status = (intptr_t)iob.out; return 0; } /* * uafs_getvolquota * Get quota of volume associated with path */ int uafs_getvolquota(char *path, afs_int32 * BlocksInUse, afs_int32 * MaxQuota) { int rc; struct afs_ioctl iob; VolumeStatus status; iob.in = 0; iob.in_size = 0; iob.out = (char *)&status; iob.out_size = sizeof status; rc = call_syscall(AFSCALL_PIOCTL, (long)path, _VICEIOCTL(4), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } *BlocksInUse = status.BlocksInUse; *MaxQuota = status.MaxQuota; return 0; } /* * uafs_setvolquota * Set quota of volume associated with path */ int uafs_setvolquota(char *path, afs_int32 MaxQuota) { int rc; struct afs_ioctl iob; VolumeStatus status = { 0 }; iob.in = (char *)&status; iob.in_size = sizeof status; iob.out = 0; iob.out_size = 0; status.MaxQuota = MaxQuota; status.MinQuota = -1; rc = call_syscall(AFSCALL_PIOCTL, (long)path, _VICEIOCTL(5), (long)&iob, 0, 0); if (rc != 0) { errno = rc; return -1; } return 0; } /* * uafs_statmountpoint * Determine whether a dir. is a mount point or not * return 1 if mount point, 0 if not */ int uafs_statmountpoint(char *path) { int retval; AFS_GLOCK(); retval = uafs_statmountpoint_r(path); AFS_GUNLOCK(); return retval; } int uafs_statmountpoint_r(char *path) { int code; struct vnode *vp; struct vcache *avc; int r; code = uafs_LookupName(path, afs_CurrentDir, &vp, 0, 1); if (code != 0) { errno = code; return -1; } avc = VTOAFS(vp); r = avc->mvstat; VN_RELE(vp); return r; } /* * uafs_getRights * Get a list of rights for the current user on path. */ int uafs_access(char *path, int flags) { int code; struct vnode *vp; int fileMode = 0; if (flags & R_OK) { fileMode |= VREAD; } if (flags & W_OK) { fileMode |= VWRITE; } if (flags & X_OK) { fileMode |= VEXEC; } AFS_GLOCK(); code = uafs_LookupName(path, afs_CurrentDir, &vp, 1, 0); if (code != 0) { errno = code; AFS_GUNLOCK(); return -1; } code = afs_access(VTOAFS(vp), fileMode, get_user_struct()->u_cred); VN_RELE(vp); if (code != 0) errno = code; AFS_GUNLOCK(); return code ? -1 : 0; } /* * uafs_getRights * Get a list of rights for the current user on path. */ int uafs_getRights(char *path) { int code; struct vnode *vp; int afs_rights; AFS_GLOCK(); code = uafs_LookupName(path, afs_CurrentDir, &vp, 1, 0); if (code != 0) { errno = code; AFS_GUNLOCK(); return -1; } afs_rights = PRSFS_READ | PRSFS_WRITE | PRSFS_INSERT | PRSFS_LOOKUP | PRSFS_DELETE | PRSFS_LOCK | PRSFS_ADMINISTER; afs_rights = afs_getRights(VTOAFS(vp), afs_rights, get_user_struct()->u_cred); AFS_GUNLOCK(); return afs_rights; } #endif /* UKERNEL */