diff options
Diffstat (limited to 'source3/locking')
| -rw-r--r-- | source3/locking/brlock.c | 296 | ||||
| -rw-r--r-- | source3/locking/locking.c | 641 | ||||
| -rw-r--r-- | source3/locking/posix.c | 322 |
3 files changed, 137 insertions, 1122 deletions
diff --git a/source3/locking/brlock.c b/source3/locking/brlock.c index 410fb3fc0b..0ded1846b4 100644 --- a/source3/locking/brlock.c +++ b/source3/locking/brlock.c @@ -171,237 +171,6 @@ BOOL brl_lock(SMB_DEV_T dev, SMB_INO_T ino, int fnum, } /**************************************************************************** - Create a list of lock ranges that don't overlap a given range. Used in calculating - POSIX lock unlocks. This is a difficult function that requires ASCII art to - understand it :-). -****************************************************************************/ - -struct unlock_list *brl_unlock_list(TALLOC_CTX *ctx, struct unlock_list *ulhead, - pid_t pid, SMB_DEV_T dev, SMB_INO_T ino) -{ - struct lock_key key; - TDB_DATA kbuf, dbuf; - struct lock_struct *locks; - int num_locks, i; - - /* - * Setup the key for this fetch. - */ - key.device = dev; - key.inode = ino; - kbuf.dptr = (char *)&key; - kbuf.dsize = sizeof(key); - - dbuf.dptr = NULL; - - tdb_lockchain(tdb, kbuf); - dbuf = tdb_fetch(tdb, kbuf); - - if (!dbuf.dptr) { - tdb_unlockchain(tdb, kbuf); - return ulhead; - } - - locks = (struct lock_struct *)dbuf.dptr; - num_locks = dbuf.dsize / sizeof(*locks); - - /* - * Check the current lock list on this dev/inode pair. - * Quit if the list is deleted. - */ - - DEBUG(10,("brl_unlock_list: curr: start=%.0f,size=%.0f\n", - (double)ulhead->start, (double)ulhead->size )); - - for (i=0; i<num_locks && ulhead; i++) { - - struct lock_struct *lock = &locks[i]; - struct unlock_list *ul_curr; - - /* If it's not this process, ignore it. */ - if (lock->context.pid != pid) - continue; - - /* - * Walk the unlock list, checking for overlaps. Note that - * the unlock list can expand within this loop if the current - * range being examined needs to be split. - */ - - for (ul_curr = ulhead; ul_curr;) { - - DEBUG(10,("brl_unlock_list: lock: start=%.0f,size=%.0f:", - (double)lock->start, (double)lock->size )); - - if ( (ul_curr->start >= (lock->start + lock->size)) || - (lock->start > (ul_curr->start + ul_curr->size))) { - - /* No overlap with this lock - leave this range alone. */ -/********************************************* - +---------+ - | ul_curr | - +---------+ - +-------+ - | lock | - +-------+ -OR.... - +---------+ - | ul_curr | - +---------+ -**********************************************/ - - DEBUG(10,("no overlap case.\n" )); - - ul_curr = ul_curr->next; - - } else if ( (ul_curr->start >= lock->start) && - (ul_curr->start + ul_curr->size <= lock->start + lock->size) ) { - - /* - * This unlock is completely overlapped by this existing lock range - * and thus should have no effect (not be unlocked). Delete it from the list. - */ -/********************************************* - +---------+ - | ul_curr | - +---------+ - +---------------------------+ - | lock | - +---------------------------+ -**********************************************/ - /* Save the next pointer */ - struct unlock_list *ul_next = ul_curr->next; - - DEBUG(10,("delete case.\n" )); - - DLIST_REMOVE(ulhead, ul_curr); - if(ulhead == NULL) - break; /* No more list... */ - - ul_curr = ul_next; - - } else if ( (ul_curr->start >= lock->start) && - (ul_curr->start < lock->start + lock->size) && - (ul_curr->start + ul_curr->size > lock->start + lock->size) ) { - - /* - * This unlock overlaps the existing lock range at the high end. - * Truncate by moving start to existing range end and reducing size. - */ -/********************************************* - +---------------+ - | ul_curr | - +---------------+ - +---------------+ - | lock | - +---------------+ -BECOMES.... - +-------+ - |ul_curr| - +-------+ -**********************************************/ - - ul_curr->size = (ul_curr->start + ul_curr->size) - (lock->start + lock->size); - ul_curr->start = lock->start + lock->size; - - DEBUG(10,("truncate high case: start=%.0f,size=%.0f\n", - (double)ul_curr->start, (double)ul_curr->size )); - - ul_curr = ul_curr->next; - - } else if ( (ul_curr->start < lock->start) && - (ul_curr->start + ul_curr->size > lock->start) ) { - - /* - * This unlock overlaps the existing lock range at the low end. - * Truncate by reducing size. - */ -/********************************************* - +---------------+ - | ul_curr | - +---------------+ - +---------------+ - | lock | - +---------------+ -BECOMES.... - +-------+ - |ul_curr| - +-------+ -**********************************************/ - - ul_curr->size = lock->start - ul_curr->start; - - DEBUG(10,("truncate low case: start=%.0f,size=%.0f\n", - (double)ul_curr->start, (double)ul_curr->size )); - - ul_curr = ul_curr->next; - - } else if ( (ul_curr->start < lock->start) && - (ul_curr->start + ul_curr->size > lock->start + lock->size) ) { - /* - * Worst case scenario. Unlock request completely overlaps an existing - * lock range. Split the request into two, push the new (upper) request - * into the dlink list, and continue with the entry after ul_new (as we - * know that ul_new will not overlap with this lock). - */ -/********************************************* - +---------------------------+ - | ul_curr | - +---------------------------+ - +---------+ - | lock | - +---------+ -BECOMES..... - +-------+ +---------+ - |ul_curr| |ul_new | - +-------+ +---------+ -**********************************************/ - struct unlock_list *ul_new = (struct unlock_list *)talloc(ctx, - sizeof(struct unlock_list)); - - if(ul_new == NULL) { - DEBUG(0,("brl_unlock_list: talloc fail.\n")); - return NULL; /* The talloc_destroy takes care of cleanup. */ - } - - ZERO_STRUCTP(ul_new); - ul_new->start = lock->start + lock->size; - ul_new->size = ul_curr->start + ul_curr->size - ul_new->start; - ul_new->smbpid = ul_curr->smbpid; - - /* Add into the dlink list after the ul_curr point - NOT at ulhead. */ - DLIST_ADD(ul_curr, ul_new); - - /* Truncate the ul_curr. */ - ul_curr->size = lock->start - ul_curr->start; - - DEBUG(10,("split case: curr: start=%.0f,size=%.0f \ -new: start=%.0f,size=%.0f\n", (double)ul_curr->start, (double)ul_curr->size, - (double)ul_new->start, (double)ul_new->size )); - - ul_curr = ul_new->next; - - } else { - - /* - * This logic case should never happen. Ensure this is the - * case by forcing an abort.... Remove in production. - */ - - smb_panic("logic flaw in cases...\n"); - } - } /* end for ( ul_curr = ulhead; ul_curr;) */ - } /* end for (i=0; i<num_locks && ul_head; i++) */ - - tdb_unlockchain(tdb, kbuf); - - if (dbuf.dptr) - free(dbuf.dptr); - - return ulhead; -} - -/**************************************************************************** Unlock a range of bytes. ****************************************************************************/ @@ -426,7 +195,7 @@ BOOL brl_unlock(SMB_DEV_T dev, SMB_INO_T ino, int fnum, dbuf = tdb_fetch(tdb, kbuf); if (!dbuf.dptr) { - DEBUG(0,("brl_unlock: tdb_fetch failed !\n")); + DEBUG(10,("brl_unlock: tdb_fetch failed !\n")); goto fail; } @@ -591,69 +360,6 @@ void brl_close(SMB_DEV_T dev, SMB_INO_T ino, pid_t pid, int tid, int fnum) } /**************************************************************************** - Return a lock list associated with an open file. -****************************************************************************/ - -struct unlock_list *brl_getlocklist( TALLOC_CTX *ctx, SMB_DEV_T dev, SMB_INO_T ino, pid_t pid, int tid, int fnum) -{ - struct lock_key key; - TDB_DATA kbuf, dbuf; - int i, count; - struct lock_struct *locks; - struct unlock_list *ulist = NULL; - - key.device = dev; - key.inode = ino; - kbuf.dptr = (char *)&key; - kbuf.dsize = sizeof(key); - - dbuf.dptr = NULL; - - tdb_lockchain(tdb, kbuf); - dbuf = tdb_fetch(tdb, kbuf); - - if (!dbuf.dptr) { - tdb_unlockchain(tdb, kbuf); - return NULL; - } - - /* There are existing locks - allocate an entry for each one. */ - locks = (struct lock_struct *)dbuf.dptr; - count = dbuf.dsize / sizeof(*locks); - - for (i=0; i<count; i++) { - struct lock_struct *lock = &locks[i]; - - if (lock->context.tid == tid && - lock->context.pid == pid && - lock->fnum == fnum) { - - struct unlock_list *ul_new = (struct unlock_list *)talloc(ctx, - sizeof(struct unlock_list)); - - if(ul_new == NULL) { - DEBUG(0,("brl_getlocklist: talloc fail.\n")); - return NULL; /* The talloc_destroy takes care of cleanup. */ - } - - ZERO_STRUCTP(ul_new); - ul_new->start = lock->start; - ul_new->size = lock->size; - ul_new->smbpid = lock->context.smbpid; - - DLIST_ADD(ulist, ul_new); - } - } - - if (dbuf.dptr) - free(dbuf.dptr); - tdb_unlockchain(tdb, kbuf); - - return ulist; -} - - -/**************************************************************************** Traverse the whole database with this function, calling traverse_callback on each lock. ****************************************************************************/ diff --git a/source3/locking/locking.c b/source3/locking/locking.c index fa56e0a628..75198d6303 100644 --- a/source3/locking/locking.c +++ b/source3/locking/locking.c @@ -42,190 +42,6 @@ int global_smbpid; /* the locking database handle */ static TDB_CONTEXT *tdb; -/* - * Doubly linked list to hold pending closes needed for - * POSIX locks. This may be changed to use a hash table (as - * in lib/hash.c if this is too slow in use.... JRA. - */ - -struct pending_closes { - struct pending_closes *next; - struct pending_closes *prev; - SMB_DEV_T dev; - SMB_INO_T inode; - int num_posix_locks; - size_t fd_array_size; - int *fd_array; -}; - -static struct pending_closes *pending_close_list = NULL; - -/**************************************************************************** - Find a dev/inode pair in the pending close list. -****************************************************************************/ - -static struct pending_closes *find_pending_close_entry(SMB_DEV_T dev, SMB_INO_T inode) -{ - struct pending_closes *pc; - - for(pc = pending_close_list; pc; pc = pc->next) { - if (dev == pc->dev && inode == pc->inode) { - DLIST_PROMOTE(pending_close_list,pc); - return pc; - } - } - - return NULL; -} - -/**************************************************************************** - Add an fd into the pending close array. -****************************************************************************/ - -static BOOL add_fd_to_close_entry(struct pending_closes *pc, int fd) -{ - if ((pc->fd_array = (int *)Realloc(pc->fd_array, (pc->fd_array_size + 1)*sizeof(int))) == NULL) { - DEBUG(0,("add_fd_to_close_entry: Unable to increase fd_array !\n")); - return False; - } - - pc->fd_array[pc->fd_array_size] = fd; - pc->fd_array_size++; - - DEBUG(10,("add_fd_to_close_entry: added fd = %d, size = %u : dev = %.0f, ino = %.0f\n", - fd, (unsigned int)pc->fd_array_size, (double)pc->dev, (double)pc->inode )); - - return True; -} - -/**************************************************************************** - Deal with pending closes needed by POSIX locking support. -****************************************************************************/ - -int fd_close_posix(struct connection_struct *conn, files_struct *fsp) -{ - struct pending_closes *pc; - int saved_errno = 0; - int ret; - size_t i; - - if (!lp_posix_locking(SNUM(conn))) { - ret = conn->vfs_ops.close(fsp->fd); - fsp->fd = -1; - return ret; - } - - pc = find_pending_close_entry(fsp->dev, fsp->inode); - - if (!pc) { - /* - * No other open with a POSIX lock on this dev/inode within this smbd. - * Just close the fd. - */ - ret = conn->vfs_ops.close(fsp->fd); - fsp->fd = -1; - return ret; - } - - if (pc->num_posix_locks) { - /* - * There are outstanding locks on this dev/inode pair. - * Add our fd to the list and set fsp->fd to -1 to - * stop the close. - */ - - if (!add_fd_to_close_entry(pc, fsp->fd)) - return False; - - fsp->fd = -1; - return 0; - } - - DEBUG(10,("fd_close_posix: doing close on %u fd's.\n", (unsigned int)pc->fd_array_size )); - - /* - * This is the last close. If there are pending fd's close them - * now. Save the errno just in case. - */ - - for(i = 0; i < pc->fd_array_size; i++) { - if (pc->fd_array[i] != -1) { - if (conn->vfs_ops.close(pc->fd_array[i]) == -1) { - saved_errno = errno; - } - } - } - - if (pc->fd_array) - free((char *)pc->fd_array); - - DLIST_REMOVE(pending_close_list, pc); - - free((char *)pc); - - ret = conn->vfs_ops.close(fsp->fd); - - if (saved_errno != 0) { - errno = saved_errno; - ret = -1; - } - - fsp->fd = -1; - - return ret; -} - -/**************************************************************************** - A POSIX lock was granted. Increment the lock list count (create if needed). -****************************************************************************/ - -static void increment_posix_lock_list(files_struct *fsp) -{ - struct pending_closes *pc; - - if ((pc = find_pending_close_entry(fsp->dev, fsp->inode)) == NULL) { - if (!(pc = (struct pending_closes *)malloc(sizeof(struct pending_closes)))) { - DEBUG(0,("increment_lock_list: malloc fail.\n")); - return; - } - ZERO_STRUCTP(pc); - pc->dev = fsp->dev; - pc->inode = fsp->inode; - DLIST_ADD(pending_close_list, pc); - - DEBUG(10,("increment_posix_lock_list: creating entry for file %s: dev = %.0f, ino = %.0f\n", - fsp->fsp_name, (double)fsp->dev, (double)fsp->inode )); - } - - pc->num_posix_locks++; - - DEBUG(10,("increment_posix_lock_list: entry for file %s: dev = %.0f, ino = %.0f, num_locks = %d\n", - fsp->fsp_name, (double)pc->dev, (double)pc->inode, pc->num_posix_locks )); -} - - -/**************************************************************************** - A POSIX lock was granted. Decrement the lock list count. -****************************************************************************/ - -static void decrement_posix_lock_list(files_struct *fsp) -{ - struct pending_closes *pc; - - pc = find_pending_close_entry(fsp->dev, fsp->inode); - - if (pc == NULL) { - smb_panic("decrement_lock_list: Unlock not found !\n"); - } - - pc->num_posix_locks--; - - DEBUG(10,("decrement_posix_lock_list: entry for file %s: dev = %.0f, ino = %.0f, num_locks = %d\n", - fsp->fsp_name, (double)pc->dev, (double)pc->inode, pc->num_posix_locks )); - - SMB_ASSERT(pc->num_posix_locks >= 0); -} - /**************************************************************************** Debugging aid :-). ****************************************************************************/ @@ -236,347 +52,6 @@ static const char *lock_type_name(enum brl_type lock_type) } /**************************************************************************** - Utility function to map a lock type correctly depending on the open - mode of a file. -****************************************************************************/ - -static int map_posix_lock_type( files_struct *fsp, enum brl_type lock_type) -{ - if((lock_type == WRITE_LOCK) && !fsp->can_write) { - /* - * Many UNIX's cannot get a write lock on a file opened read-only. - * Win32 locking semantics allow this. - * Do the best we can and attempt a read-only lock. - */ - DEBUG(10,("map_posix_lock_type: Downgrading write lock to read due to read-only file.\n")); - return F_RDLCK; - } else if((lock_type == READ_LOCK) && !fsp->can_read) { - /* - * Ditto for read locks on write only files. - */ - DEBUG(10,("map_posix_lock_type: Changing read lock to write due to write-only file.\n")); - return F_WRLCK; - } - - /* - * This return should be the most normal, as we attempt - * to always open files read/write. - */ - - return (lock_type == READ_LOCK) ? F_RDLCK : F_WRLCK; -} - -/**************************************************************************** - Check to see if the given unsigned lock range is within the possible POSIX - range. Modifies the given args to be in range if possible, just returns - False if not. -****************************************************************************/ - -static BOOL posix_lock_in_range(SMB_OFF_T *offset_out, SMB_OFF_T *count_out, - SMB_BIG_UINT u_offset, SMB_BIG_UINT u_count) -{ - SMB_OFF_T offset; - SMB_OFF_T count; - -#if defined(LARGE_SMB_OFF_T) && !defined(HAVE_BROKEN_FCNTL64_LOCKS) - - SMB_OFF_T mask2 = ((SMB_OFF_T)0x4) << (SMB_OFF_T_BITS-4); - SMB_OFF_T mask = (mask2<<1); - SMB_OFF_T neg_mask = ~mask; - - /* - * In this case SMB_OFF_T is 64 bits, - * and the underlying system can handle 64 bit signed locks. - * Cast to signed type. - */ - - offset = (SMB_OFF_T)u_offset; - count = (SMB_OFF_T)u_count; - - /* - * Deal with a very common case of count of all ones. - * (lock entire file). - */ - - if(count == (SMB_OFF_T)-1) - count &= ~mask; - - /* - * POSIX lock ranges cannot be negative. - * Fail if any combination becomes negative. - */ - - if(offset < 0 || count < 0 || (offset + count < 0)) { - DEBUG(10,("posix_lock_in_range: negative range: offset = %.0f, count = %.0f. Ignoring lock.\n", - (double)offset, (double)count )); - return False; - } - - /* - * In this case SMB_OFF_T is 64 bits, the offset and count - * fit within the positive range, and the underlying - * system can handle 64 bit locks. Just return as the - * cast values are ok. - */ - -#else /* !LARGE_SMB_OFF_T || HAVE_BROKEN_FCNTL64_LOCKS */ - - /* - * In this case either SMB_OFF_T is 32 bits, - * or the underlying system cannot handle 64 bit signed locks. - * Either way we have to try and mangle to fit within 31 bits. - * This is difficult. - */ - -#if defined(HAVE_BROKEN_FCNTL64_LOCKS) - - /* - * SMB_OFF_T is 64 bits, but we need to use 31 bits due to - * broken large locking. - */ - - /* - * Deal with a very common case of count of all ones. - * (lock entire file). - */ - - if(u_count == (SMB_BIG_UINT)-1) - count = 0x7FFFFFFF; - - if(((u_offset >> 32) & 0xFFFFFFFF) || ((u_count >> 32) & 0xFFFFFFFF)) { - DEBUG(10,("posix_lock_in_range: top 32 bits not zero. offset = %.0f, count = %.0f. Ignoring lock.\n", - (double)u_offset, (double)u_count )); - /* Top 32 bits of offset or count were not zero. */ - return False; - } - - /* Cast from 64 bits unsigned to 64 bits signed. */ - offset = (SMB_OFF_T)u_offset; - count = (SMB_OFF_T)u_count; - - /* - * Check if we are within the 2^31 range. - */ - - { - int32 low_offset = (int32)offset; - int32 low_count = (int32)count; - - if(low_offset < 0 || low_count < 0 || (low_offset + low_count < 0)) { - DEBUG(10,("posix_lock_in_range: not within 2^31 range. low_offset = %d, low_count = %d. Ignoring lock.\n", - low_offset, low_count )); - return False; - } - } - - /* - * Ok - we can map from a 64 bit number to a 31 bit lock. - */ - -#else /* HAVE_BROKEN_FCNTL64_LOCKS */ - - /* - * SMB_OFF_T is 32 bits. - */ - -#if defined(HAVE_LONGLONG) - - /* - * SMB_BIG_UINT is 64 bits, we can do a 32 bit shift. - */ - - /* - * Deal with a very common case of count of all ones. - * (lock entire file). - */ - - if(u_count == (SMB_BIG_UINT)-1) - count = 0x7FFFFFFF; - - if(((u_offset >> 32) & 0xFFFFFFFF) || ((u_count >> 32) & 0xFFFFFFFF)) { - DEBUG(10,("posix_lock_in_range: top 32 bits not zero. u_offset = %.0f, u_count = %.0f. Ignoring lock.\n", - (double)u_offset, (double)u_count )); - return False; - } - - /* Cast from 64 bits unsigned to 32 bits signed. */ - offset = (SMB_OFF_T)u_offset; - count = (SMB_OFF_T)u_count; - - /* - * Check if we are within the 2^31 range. - */ - - if(offset < 0 || count < 0 || (offset + count < 0)) { - DEBUG(10,("posix_lock_in_range: not within 2^31 range. offset = %d, count = %d. Ignoring lock.\n", - (int)offset, (int)count )); - return False; - } - -#else /* HAVE_LONGLONG */ - - /* - * SMB_BIG_UINT and SMB_OFF_T are both 32 bits, - * just cast. - */ - - /* - * Deal with a very common case of count of all ones. - * (lock entire file). - */ - - if(u_count == (SMB_BIG_UINT)-1) - count = 0x7FFFFFFF; - - /* Cast from 32 bits unsigned to 32 bits signed. */ - offset = (SMB_OFF_T)u_offset; - count = (SMB_OFF_T)u_count; - - /* - * Check if we are within the 2^31 range. - */ - - if(offset < 0 || count < 0 || (offset + count < 0)) { - DEBUG(10,("posix_lock_in_range: not within 2^31 range. offset = %d, count = %d. Ignoring lock.\n", - (int)offset, (int)count )); - return False; - } - -#endif /* HAVE_LONGLONG */ -#endif /* LARGE_SMB_OFF_T */ -#endif /* !LARGE_SMB_OFF_T || HAVE_BROKEN_FCNTL64_LOCKS */ - - /* - * The mapping was successful. - */ - - DEBUG(10,("posix_lock_in_range: offset_out = %.0f, count_out = %.0f\n", - (double)offset, (double)count )); - - *offset_out = offset; - *count_out = count; - - return True; -} - -/**************************************************************************** - POSIX function to see if a file region is locked. Returns True if the - region is locked, False otherwise. -****************************************************************************/ - -static BOOL is_posix_locked(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG_UINT u_count, enum brl_type lock_type) -{ - SMB_OFF_T offset; - SMB_OFF_T count; - - DEBUG(10,("is_posix_locked: File %s, offset = %.0f, count = %.0f, type = %s\n", - fsp->fsp_name, (double)u_offset, (double)u_count, lock_type_name(lock_type) )); - - /* - * If the requested lock won't fit in the POSIX range, we will - * never set it, so presume it is not locked. - */ - - if(!posix_lock_in_range(&offset, &count, u_offset, u_count)) - return False; - - /* - * Note that most UNIX's can *test* for a write lock on - * a read-only fd, just not *set* a write lock on a read-only - * fd. So we don't need to use map_lock_type here. - */ - - return fcntl_lock(fsp->fd,SMB_F_GETLK,offset,count,lock_type); -} - -/**************************************************************************** - POSIX function to acquire a lock. Returns True if the - lock could be granted, False if not. -****************************************************************************/ - -static BOOL set_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG_UINT u_count, enum brl_type lock_type) -{ - SMB_OFF_T offset; - SMB_OFF_T count; - BOOL ret = True; - - DEBUG(5,("set_posix_lock: File %s, offset = %.0f, count = %.0f, type = %s\n", - fsp->fsp_name, (double)u_offset, (double)u_count, lock_type_name(lock_type) )); - - /* - * If the requested lock won't fit in the POSIX range, we will - * pretend it was successful. - */ - - if(!posix_lock_in_range(&offset, &count, u_offset, u_count)) { - increment_posix_lock_list(fsp); - return True; - } - - /* - * Note that setting multiple overlapping read locks on different - * file descriptors will not be held separately by the kernel (POSIX - * braindamage), but will be merged into one continuous read lock - * range. We cope with this case in the release_posix_lock code - * below. JRA. - */ - - ret = fcntl_lock(fsp->fd,SMB_F_SETLK,offset,count,map_posix_lock_type(fsp,lock_type)); - - if (ret) - increment_posix_lock_list(fsp); - - return ret; -} - -/**************************************************************************** - POSIX function to release a lock given a list. Returns True if the - lock could be released, False if not. -****************************************************************************/ - -static BOOL release_posix_lock(files_struct *fsp, struct unlock_list *ulist) -{ - BOOL ret = True; - - for(; ulist; ulist = ulist->next) { - SMB_OFF_T offset = ulist->start; - SMB_OFF_T count = ulist->size; - - DEBUG(5,("release_posix_lock: File %s, offset = %.0f, count = %.0f\n", - fsp->fsp_name, (double)offset, (double)count )); - - if(count == 0) { - - /* - * This lock must overlap with an existing read-only lock - * held by another fd. Don't do any POSIX call. - */ - - continue; - } - - /* - * If the requested lock won't fit in the POSIX range, we will - * pretend it was successful. - */ - - if(!posix_lock_in_range(&offset, &count, offset, count)) - continue; - - ret = fcntl_lock(fsp->fd,SMB_F_SETLK,offset,count,F_UNLCK); - } - - /* - * We treat this as one unlock request for POSIX accounting purposes even - * if it may have been split into multiple smaller POSIX unlock ranges. - */ - - decrement_posix_lock_list(fsp); - - return ret; -} - -/**************************************************************************** Utility function called to see if a file region is locked. ****************************************************************************/ @@ -675,10 +150,6 @@ BOOL do_unlock(files_struct *fsp,connection_struct *conn, int *eclass,uint32 *ecode) { BOOL ok = False; - TALLOC_CTX *ul_ctx = NULL; - struct unlock_list *ulist = NULL; - struct unlock_list *ul = NULL; - pid_t pid; if (!lp_locking(SNUM(conn))) return(True); @@ -698,10 +169,8 @@ BOOL do_unlock(files_struct *fsp,connection_struct *conn, * match then don't bother looking to remove POSIX locks. */ - pid = getpid(); - ok = brl_unlock(fsp->dev, fsp->inode, fsp->fnum, - global_smbpid, pid, conn->cnum, offset, count); + global_smbpid, getpid(), conn->cnum, offset, count); if (!ok) { DEBUG(10,("do_unlock: returning ERRlock.\n" )); @@ -713,47 +182,7 @@ BOOL do_unlock(files_struct *fsp,connection_struct *conn, if (!lp_posix_locking(SNUM(conn))) return True; - if ((ul_ctx = talloc_init()) == NULL) { - DEBUG(0,("do_unlock: unable to init talloc context.\n")); - return True; /* Not a fatal error. */ - } - - if ((ul = (struct unlock_list *)talloc(ul_ctx, sizeof(struct unlock_list))) == NULL) { - DEBUG(0,("do_unlock: unable to talloc unlock list.\n")); - talloc_destroy(ul_ctx); - return True; /* Not a fatal error. */ - } - - /* - * Create the initial list entry containing the - * lock we want to remove. - */ - - ZERO_STRUCTP(ul); - ul->start = offset; - ul->size = count; - ul->smbpid = global_smbpid; - - DLIST_ADD(ulist, ul); - - /* - * The following call calculates if there are any - * overlapping read locks held by this process on - * other fd's open on the same file and creates a - * list of unlock ranges that will allow other - * POSIX lock ranges to remain on the file whilst the - * unlocks are performed. - */ - - ulist = brl_unlock_list(ul_ctx, ulist, pid, fsp->dev, fsp->inode); - - /* - * Release the POSIX locks on the list of ranges returned. - */ - - (void)release_posix_lock(fsp, ulist); - - talloc_destroy(ul_ctx); + (void)release_posix_lock(fsp, offset, count); return True; /* Did unlock */ } @@ -769,66 +198,19 @@ void locking_close_file(files_struct *fsp) if (!lp_locking(SNUM(fsp->conn))) return; - if(lp_posix_locking(SNUM(fsp->conn))) { - - TALLOC_CTX *ul_ctx = NULL; - struct unlock_list *ul = NULL; - int eclass; - uint32 ecode; - struct pending_closes *pc; - - /* - * Optimization for the common case where we are the only - * opener of a file. If all fd entries are our own, we don't - * need to explicitly release all the locks via the POSIX functions, - * we can just release all the brl locks, as in the no POSIX locking case. - */ - - if ((pc = find_pending_close_entry(fsp->dev, fsp->inode)) != NULL) { - - if (pc->fd_array_size == 1 && pc->fd_array[0] == fsp->fd ) { - /* - * Just release all the brl locks, no need to release individually. - */ - - brl_close(fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum); - return; - } - } - - if ((ul_ctx = talloc_init()) == NULL) { - DEBUG(0,("locking_close_file: unable to init talloc context.\n")); - return; - } - - /* - * We need to release all POSIX locks we have on this - * fd. Get all our existing locks from the tdb locking database. - */ - - ul = brl_getlocklist(ul_ctx, fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum); - - /* - * Now unlock all of them. This will remove the brl entry also - * for each lock. Note we need to make sure the global_smbpid matches - * the one associated with each lock in case the client plays games - * with smbpids (like smbtorture does :-). - */ + /* + * Just release all the brl locks, no need to release individually. + */ - for(; ul; ul = ul->next) { - global_smbpid = ul->smbpid; - do_unlock(fsp,fsp->conn,ul->size,ul->start,&eclass,&ecode); - } - - talloc_destroy(ul_ctx); + brl_close(fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum); - } else { + if(lp_posix_locking(SNUM(fsp->conn))) { - /* - * Just release all the brl locks, no need to release individually. + /* + * Release all the POSIX locks. */ + posix_locking_close_file(fsp); - brl_close(fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum); } } @@ -851,6 +233,9 @@ BOOL locking_init(int read_only) return False; } + if (!posix_locking_init()) + return False; + return True; } diff --git a/source3/locking/posix.c b/source3/locking/posix.c index f05a0a2a31..0fcba3432d 100644 --- a/source3/locking/posix.c +++ b/source3/locking/posix.c @@ -53,7 +53,7 @@ struct posix_lock { }; /* - * The data in POSIX pending close records is an unsorted linear array of ints + * The data in POSIX pending close records is an unsorted linear array of int * records. It is unnecessary to store the count as tdb provides the * size of the record. */ @@ -73,7 +73,7 @@ static TDB_DATA locking_key(SMB_DEV_T dev, SMB_INO_T inode) { static struct posix_lock_key key; TDB_DATA kbuf; - key.dev = dev; + key.device = dev; key.inode = inode; kbuf.dptr = (char *)&key; kbuf.dsize = sizeof(key); @@ -95,10 +95,8 @@ static TDB_DATA locking_key_fsp(files_struct *fsp) static BOOL add_fd_to_close_entry(files_struct *fsp) { - struct posix_lock_key = locking_key_fsp(fsp); - TDB_DATA kbuf, dbuf; - size_t count = 0; - int *fd_array = NULL; + TDB_DATA kbuf = locking_key_fsp(fsp); + TDB_DATA dbuf; dbuf.dptr = NULL; @@ -129,8 +127,7 @@ static BOOL add_fd_to_close_entry(files_struct *fsp) static void delete_close_entries(files_struct *fsp) { - struct posix_lock_key = locking_key_fsp(fsp); - TDB_DATA kbuf, dbuf; + TDB_DATA kbuf = locking_key_fsp(fsp); tdb_lockchain(posix_pending_close_tdb, kbuf); if (tdb_delete(posix_pending_close_tdb, kbuf) == -1) @@ -145,8 +142,8 @@ static void delete_close_entries(files_struct *fsp) static size_t get_posix_pending_close_entries(files_struct *fsp, int **entries) { - struct posix_lock_key = locking_key_fsp(fsp); - TDB_DATA kbuf, dbuf; + TDB_DATA kbuf = locking_key_fsp(fsp); + TDB_DATA dbuf; size_t count = 0; *entries = NULL; @@ -175,8 +172,8 @@ static size_t get_posix_pending_close_entries(files_struct *fsp, int **entries) static size_t get_posix_lock_entries(files_struct *fsp, struct posix_lock **entries) { - struct posix_lock_key = locking_key_fsp(fsp); - TDB_DATA kbuf, dbuf; + TDB_DATA kbuf = locking_key_fsp(fsp); + TDB_DATA dbuf; size_t count = 0; *entries = NULL; @@ -191,8 +188,8 @@ static size_t get_posix_lock_entries(files_struct *fsp, struct posix_lock **entr return 0; } - *entries = (struct posix_lock_struct *)dbuf.dptr; - count = (size_t)(dbuf.dsize / sizeof(struct posix_lock_struct)); + *entries = (struct posix_lock *)dbuf.dptr; + count = (size_t)(dbuf.dsize / sizeof(struct posix_lock)); tdb_unlockchain(posix_lock_tdb, kbuf); @@ -251,7 +248,7 @@ int fd_close_posix(struct connection_struct *conn, files_struct *fsp) * from the tdb and close them all. */ - count = get_posix_pending_close_entries(fsp, &fd_array) + count = get_posix_pending_close_entries(fsp, &fd_array); if (count) { DEBUG(10,("fd_close_posix: doing close on %u fd's.\n", (unsigned int)count )); @@ -307,8 +304,8 @@ static const char *posix_lock_type_name(int lock_type) static BOOL add_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_T size, int lock_type) { - struct posix_lock_key = locking_key_fsp(fsp); - TDB_DATA kbuf, dbuf; + TDB_DATA kbuf = locking_key_fsp(fsp); + TDB_DATA dbuf; struct posix_lock pl; /* @@ -325,14 +322,14 @@ static BOOL add_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_T s tdb_lockchain(posix_lock_tdb, kbuf); dbuf = tdb_fetch(posix_lock_tdb, kbuf); - dbuf.dptr = Realloc(dbuf.dptr, dbuf.dsize + sizeof(*pl)); + dbuf.dptr = Realloc(dbuf.dptr, dbuf.dsize + sizeof(pl)); if (!dbuf.dptr) { DEBUG(0,("add_posix_lock_entry: Realloc fail !\n")); goto fail; } - memcpy(dbuf.dptr + dbuf.dsize, rec, sizeof(*pl)); - dbuf.dsize += sizeof(*pl); + memcpy(dbuf.dptr + dbuf.dsize, &pl, sizeof(pl)); + dbuf.dsize += sizeof(pl); if (tdb_store(posix_lock_tdb, kbuf, dbuf, TDB_REPLACE) == -1) { DEBUG(0,("add_posix_lock: Failed to add lock entry on file %s\n", fsp->fsp_name)); @@ -351,7 +348,7 @@ static BOOL add_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_T s fail: if (dbuf.dptr) free(dbuf.dptr); - tdb_unlockchain(tdb, kbuf); + tdb_unlockchain(posix_lock_tdb, kbuf); return False; } @@ -361,8 +358,8 @@ static BOOL add_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_T s static BOOL delete_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_T size) { - struct posix_lock_key = locking_key_fsp(fsp); - TDB_DATA kbuf, dbuf; + TDB_DATA kbuf = locking_key_fsp(fsp); + TDB_DATA dbuf; struct posix_lock *locks; size_t i, count; @@ -377,13 +374,13 @@ static BOOL delete_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_ } /* There are existing locks - find a match. */ - locks = (struct lock_struct *)dbuf.dptr; - count = (size_t(dbuf.dsize / sizeof(*locks)); + locks = (struct posix_lock *)dbuf.dptr; + count = (size_t)(dbuf.dsize / sizeof(*locks)); for (i=0; i<count; i++) { struct posix_lock *pl = &locks[i]; - if (pl->fd == fd && + if (pl->fd == fsp->fd && pl->start == start && pl->size == size) { /* Found it - delete it. */ @@ -394,11 +391,11 @@ static BOOL delete_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_ memmove(&locks[i], &locks[i+1], sizeof(*locks)*((count-1) - i)); } dbuf.dsize -= sizeof(*locks); - tdb_store(tdb, kbuf, dbuf, TDB_REPLACE); + tdb_store(posix_lock_tdb, kbuf, dbuf, TDB_REPLACE); } free(dbuf.dptr); - tdb_unlockchain(tdb, kbuf); + tdb_unlockchain(posix_lock_tdb, kbuf); return True; } } @@ -408,7 +405,7 @@ static BOOL delete_posix_lock_entry(files_struct *fsp, SMB_OFF_T start, SMB_OFF_ fail: if (dbuf.dptr) free(dbuf.dptr); - tdb_unlockchain(tdb, kbuf); + tdb_unlockchain(posix_lock_tdb, kbuf); return False; } @@ -648,7 +645,7 @@ BOOL is_posix_locked(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG_UINT u_co int posix_lock_type = map_posix_lock_type(fsp,lock_type); DEBUG(10,("is_posix_locked: File %s, offset = %.0f, count = %.0f, type = %s\n", - fsp->fsp_name, (double)u_offset, (double)u_count, lock_type_name(lock_type) )); + fsp->fsp_name, (double)u_offset, (double)u_count, posix_lock_type_name(lock_type) )); /* * If the requested lock won't fit in the POSIX range, we will @@ -680,7 +677,7 @@ BOOL set_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG_UINT u_cou int posix_lock_type = map_posix_lock_type(fsp,lock_type); DEBUG(5,("set_posix_lock: File %s, offset = %.0f, count = %.0f, type = %s\n", - fsp->fsp_name, (double)u_offset, (double)u_count, lock_type_name(lock_type) )); + fsp->fsp_name, (double)u_offset, (double)u_count, posix_lock_type_name(lock_type) )); /* * If the requested lock won't fit in the POSIX range, we will @@ -691,9 +688,9 @@ BOOL set_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG_UINT u_cou return True; /* - * Note that setting multiple overlapping read locks on different + * Note that setting multiple overlapping locks on different * file descriptors will not be held separately by the kernel (POSIX - * braindamage), but will be merged into one continuous read lock + * braindamage), but will be merged into one continuous lock * range. We cope with this case in the release_posix_lock code * below. JRA. */ @@ -716,7 +713,6 @@ struct unlock_list { struct unlock_list *prev; SMB_OFF_T start; SMB_OFF_T size; - int fd; }; /**************************************************************************** @@ -727,49 +723,37 @@ struct unlock_list { static struct unlock_list *posix_unlock_list(TALLOC_CTX *ctx, struct unlock_list *ulhead, files_struct *fsp) { - struct lock_key key; - TDB_DATA kbuf, dbuf; - struct lock_struct *locks; - int num_locks, i; - - /* - * Setup the key for this fetch. - */ - key.device = dev; - key.inode = ino; - kbuf.dptr = (char *)&key; - kbuf.dsize = sizeof(key); + TDB_DATA kbuf = locking_key_fsp(fsp); + TDB_DATA dbuf; + struct posix_lock *locks; + size_t num_locks, i; dbuf.dptr = NULL; - tdb_lockchain(tdb, kbuf); - dbuf = tdb_fetch(tdb, kbuf); + tdb_lockchain(posix_lock_tdb, kbuf); + dbuf = tdb_fetch(posix_lock_tdb, kbuf); if (!dbuf.dptr) { - tdb_unlockchain(tdb, kbuf); + tdb_unlockchain(posix_lock_tdb, kbuf); return ulhead; } - locks = (struct lock_struct *)dbuf.dptr; - num_locks = dbuf.dsize / sizeof(*locks); + locks = (struct posix_lock *)dbuf.dptr; + num_locks = (size_t)(dbuf.dsize / sizeof(*locks)); /* * Check the current lock list on this dev/inode pair. * Quit if the list is deleted. */ - DEBUG(10,("brl_unlock_list: curr: start=%.0f,size=%.0f\n", + DEBUG(10,("posix_unlock_list: curr: start=%.0f,size=%.0f\n", (double)ulhead->start, (double)ulhead->size )); for (i=0; i<num_locks && ulhead; i++) { - struct lock_struct *lock = &locks[i]; + struct posix_lock *lock = &locks[i]; struct unlock_list *ul_curr; - /* If it's not this process, ignore it. */ - if (lock->context.pid != pid) - continue; - /* * Walk the unlock list, checking for overlaps. Note that * the unlock list can expand within this loop if the current @@ -778,7 +762,7 @@ static struct unlock_list *posix_unlock_list(TALLOC_CTX *ctx, struct unlock_list for (ul_curr = ulhead; ul_curr;) { - DEBUG(10,("brl_unlock_list: lock: start=%.0f,size=%.0f:", + DEBUG(10,("posix_unlock_list: lock: start=%.0f,size=%.0f:", (double)lock->start, (double)lock->size )); if ( (ul_curr->start >= (lock->start + lock->size)) || @@ -908,14 +892,13 @@ BECOMES..... sizeof(struct unlock_list)); if(ul_new == NULL) { - DEBUG(0,("brl_unlock_list: talloc fail.\n")); + DEBUG(0,("posix_unlock_list: talloc fail.\n")); return NULL; /* The talloc_destroy takes care of cleanup. */ } ZERO_STRUCTP(ul_new); ul_new->start = lock->start + lock->size; ul_new->size = ul_curr->start + ul_curr->size - ul_new->start; - ul_new->smbpid = ul_curr->smbpid; /* Add into the dlink list after the ul_curr point - NOT at ulhead. */ DLIST_ADD(ul_curr, ul_new); @@ -941,7 +924,7 @@ new: start=%.0f,size=%.0f\n", (double)ul_curr->start, (double)ul_curr->size, } /* end for ( ul_curr = ulhead; ul_curr;) */ } /* end for (i=0; i<num_locks && ul_head; i++) */ - tdb_unlockchain(tdb, kbuf); + tdb_unlockchain(posix_lock_tdb, kbuf); if (dbuf.dptr) free(dbuf.dptr); @@ -950,11 +933,11 @@ new: start=%.0f,size=%.0f\n", (double)ul_curr->start, (double)ul_curr->size, } /**************************************************************************** - POSIX function to release a lock given a list. Returns True if the + POSIX function to release a lock. Returns True if the lock could be released, False if not. ****************************************************************************/ -static BOOL release_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG_UINT u_count) +BOOL release_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG_UINT u_count) { SMB_OFF_T offset; SMB_OFF_T count; @@ -964,7 +947,7 @@ static BOOL release_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG struct unlock_list *ul = NULL; DEBUG(5,("release_posix_lock: File %s, offset = %.0f, count = %.0f\n", - fsp->fsp_name, (double)offset, (double)count )); + fsp->fsp_name, (double)u_offset, (double)u_count )); /* * If the requested lock won't fit in the POSIX range, we will @@ -974,6 +957,13 @@ static BOOL release_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG if(!posix_lock_in_range(&offset, &count, u_offset, u_count)) return True; + /* + * We treat this as one unlock request for POSIX accounting purposes even + * if it may have been split into multiple smaller POSIX unlock ranges. + */ + + delete_posix_lock_entry(fsp, offset, count); + if ((ul_ctx = talloc_init()) == NULL) { DEBUG(0,("release_posix_lock: unable to init talloc context.\n")); return True; /* Not a fatal error. */ @@ -993,15 +983,14 @@ static BOOL release_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG ZERO_STRUCTP(ul); ul->start = offset; ul->size = count; - ul->fd = fsp->fd; DLIST_ADD(ulist, ul); /* * The following call calculates if there are any - * overlapping read locks held by this process on - * other fd's open on the same file and creates a - * list of unlock ranges that will allow other + * overlapping locks held by this process on + * fd's open on the same file and creates a + * list of unlock ranges that will allow * POSIX lock ranges to remain on the file whilst the * unlocks are performed. */ @@ -1013,108 +1002,43 @@ static BOOL release_posix_lock(files_struct *fsp, SMB_BIG_UINT u_offset, SMB_BIG */ for(; ulist; ulist = ulist->next) { - SMB_OFF_T offset = ulist->start; - SMB_OFF_T count = ulist->size; - - DEBUG(5,("release_posix_lock: Real unlock: offset = %.0f, count = %.0f\n", - (double)offset, (double)count )); + offset = ulist->start; + count = ulist->size; if(u_count == 0) { /* - * This lock must overlap with an existing read-only lock - * held by another fd. Don't do any POSIX call. + * This lock must overlap with an existing lock. + * Don't do any POSIX call. */ continue; } - /* - * If the requested lock won't fit in the POSIX range, we will - * pretend it was successful. - */ - - if(!posix_lock_in_range(&offset, &count, offset, count)) - continue; - DEBUG(5,("release_posix_lock: Real unlock: offset = %.0f, count = %.0f\n", (double)offset, (double)count )); - ret = fcntl_lock(fsp->fd,SMB_F_SETLK,offset,count,F_UNLCK); + if (!fcntl_lock(fsp->fd,SMB_F_SETLK,offset,count,F_UNLCK)) + ret = False; } talloc_destroy(ul_ctx); - /* - * We treat this as one unlock request for POSIX accounting purposes even - * if it may have been split into multiple smaller POSIX unlock ranges. - */ - - delete_posix_lock_entry(fsp-> - return ret; } /**************************************************************************** - Return a lock list associated with an open file. + Remove all lock entries for a specific dev/inode pair from the tdb. ****************************************************************************/ -struct unlock_list *brl_getlocklist( TALLOC_CTX *ctx, SMB_DEV_T dev, SMB_INO_T ino, pid_t pid, int tid, int fnum) +static void delete_posix_lock_entries(files_struct *fsp) { - struct lock_key key; - TDB_DATA kbuf, dbuf; - int i, count; - struct lock_struct *locks; - struct unlock_list *ulist = NULL; - - key.device = dev; - key.inode = ino; - kbuf.dptr = (char *)&key; - kbuf.dsize = sizeof(key); - - dbuf.dptr = NULL; - - tdb_lockchain(tdb, kbuf); - dbuf = tdb_fetch(tdb, kbuf); - - if (!dbuf.dptr) { - tdb_unlockchain(tdb, kbuf); - return NULL; - } - - /* There are existing locks - allocate an entry for each one. */ - locks = (struct lock_struct *)dbuf.dptr; - count = dbuf.dsize / sizeof(*locks); - - for (i=0; i<count; i++) { - struct lock_struct *lock = &locks[i]; - - if (lock->context.tid == tid && - lock->context.pid == pid && - lock->fnum == fnum) { - - struct unlock_list *ul_new = (struct unlock_list *)talloc(ctx, - sizeof(struct unlock_list)); - - if(ul_new == NULL) { - DEBUG(0,("brl_getlocklist: talloc fail.\n")); - return NULL; /* The talloc_destroy takes care of cleanup. */ - } - - ZERO_STRUCTP(ul_new); - ul_new->start = lock->start; - ul_new->size = lock->size; - ul_new->smbpid = lock->context.smbpid; - - DLIST_ADD(ulist, ul_new); - } - } + TDB_DATA kbuf = locking_key_fsp(fsp); - if (dbuf.dptr) - free(dbuf.dptr); - tdb_unlockchain(tdb, kbuf); - - return ulist; + tdb_lockchain(posix_lock_tdb, kbuf); + if (tdb_delete(posix_lock_tdb, kbuf) == -1) + DEBUG(0,("delete_close_entries: tdb_delete fail !\n")); + tdb_unlockchain(posix_lock_tdb, kbuf); } /**************************************************************************** @@ -1123,86 +1047,86 @@ struct unlock_list *brl_getlocklist( TALLOC_CTX *ctx, SMB_DEV_T dev, SMB_INO_T i void posix_locking_close_file(files_struct *fsp) { - TALLOC_CTX *ul_ctx = NULL; - struct unlock_list *ul = NULL; - int eclass; - uint32 ecode; - struct pending_closes *pc; - - /* - * Optimization for the common case where we are the only - * opener of a file. If all fd entries are our own, we don't - * need to explicitly release all the locks via the POSIX functions, - * we can just release all the brl locks, as in the no POSIX locking case. - */ - - if ((pc = find_pending_close_entry(fsp->dev, fsp->inode)) != NULL) { - - if (pc->fd_array_size == 1 && pc->fd_array[0] == fsp->fd ) { - /* - * Just release all the brl locks, no need to release individually. - */ - - brl_close(fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum); - return; - } - } - - if ((ul_ctx = talloc_init()) == NULL) { - DEBUG(0,("locking_close_file: unable to init talloc context.\n")); - return; - } + struct posix_lock *entries = NULL; + size_t count, i; - /* - * We need to release all POSIX locks we have on this - * fd. Get all our existing locks from the tdb locking database. - */ + /* + * Optimization for the common case where we are the only + * opener of a file. If all fd entries are our own, we don't + * need to explicitly release all the locks via the POSIX functions, + * we can just remove all the entries in the tdb and allow the + * close to remove the real locks. + */ - ul = brl_getlocklist(ul_ctx, fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum); + count = get_posix_lock_entries(fsp, &entries); - /* - * Now unlock all of them. This will remove the brl entry also - * for each lock. Note we need to make sure the global_smbpid matches - * the one associated with each lock in case the client plays games - * with smbpids (like smbtorture does :-). - */ + if (count == 0) { + DEBUG(10,("posix_locking_close_file: file %s has no outstanding locks.\n", fsp->fsp_name )); + return; + } - for(; ul; ul = ul->next) { - global_smbpid = ul->smbpid; - do_unlock(fsp,fsp->conn,ul->size,ul->start,&eclass,&ecode); - } - - talloc_destroy(ul_ctx); + for (i = 0; i < count; i++) { + if (entries[i].fd != fsp->fd ) + break; + } - } else { + if (i == count) { + /* All locks are ours. */ + DEBUG(10,("posix_locking_close_file: file %s has %u outstanding locks, but all on one fd.\n", + fsp->fsp_name, (unsigned int)count )); + free((char *)entries); + delete_posix_lock_entries(fsp); + return; + } - /* - * Just release all the brl locks, no need to release individually. - */ + /* + * Difficult case. We need to delete all our locks, whilst leaving + * all other POSIX locks in place. + */ - brl_close(fsp->dev, fsp->inode, pid, fsp->conn->cnum, fsp->fnum); + for (i = 0; i < count; i++) { + struct posix_lock *pl = &entries[i]; + release_posix_lock(fsp, (SMB_BIG_UINT)pl->start, (SMB_BIG_UINT)pl->size ); } + free((char *)entries); } /******************************************************************* Create the in-memory POSIX lock databases. ********************************************************************/ -void posix_lock_init(void) +BOOL posix_locking_init(void) { if (posix_lock_tdb && posix_pending_close_tdb) - return; + return True; if (!posix_lock_tdb) posix_lock_tdb = tdb_open(NULL, 0, TDB_CLEAR_IF_FIRST, O_RDWR|O_CREAT, 0644); if (!posix_lock_tdb) { DEBUG(0,("Failed to open POSIX byte range locking database.\n")); + return False; } if (!posix_pending_close_tdb) posix_pending_close_tdb = tdb_open(NULL, 0, TDB_CLEAR_IF_FIRST, O_RDWR|O_CREAT, 0644); if (!posix_pending_close_tdb) { DEBUG(0,("Failed to open POSIX pending close database.\n")); + return False; } + + return True; +} + +/******************************************************************* + Delete the in-memory POSIX lock databases. +********************************************************************/ + +BOOL posix_locking_end(void) +{ + if (posix_lock_tdb && tdb_close(posix_lock_tdb) != 0) + return False; + if (posix_pending_close_tdb && tdb_close(posix_pending_close_tdb) != 0) + return False; + return True; } |