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-rw-r--r--source3/locking/brlock.c296
1 files changed, 1 insertions, 295 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.
****************************************************************************/
generated by cgit (git 2.34.1) at 2024-07-14 23:16:05 +0000