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authorCsaba Henk <csaba@gluster.com>2009-12-06 14:27:57 +0000
committerAnand V. Avati <avati@dev.gluster.com>2009-12-06 12:39:15 -0800
commit76d6f3fbe993dddd72540f461090803636fa2dc5 (patch)
tree6f5573d88eb296b153aed466a505d3f3fe3c2c1e /xlators/mount
parent33f3abffe4f0de929d3732a472ad3df766d575b7 (diff)
fuse-bridge: make use of lock owner data in a protocol adherent way.
No need for pid fallback, for those cases where we use it, it's always available. It appears conditionally in read/write/truncate (related to mandatory locking). There just get it for demonstrative purposes. Discard it from release, there locking data exists only as a portability hack, no use of it on Linux. Signed-off-by: Csaba Henk <csaba@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 336 (Use lock owner field from fuse in locks) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=336
Diffstat (limited to 'xlators/mount')
-rw-r--r--xlators/mount/fuse/src/fuse-bridge.c51
1 files changed, 29 insertions, 22 deletions
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 857686ad210..db7362ff9d1 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -222,20 +222,6 @@ get_state (xlator_t *this, fuse_in_header_t *finh)
}
-void
-set_lock_owner (fuse_state_t *state, xlator_t *this,
- uint64_t owner, uint64_t pid)
-{
- fuse_private_t *priv = NULL;
-
- priv = this->private;
-
- if (priv->proto_minor >= 9)
- state->lk_owner = owner;
- else
- state->lk_owner = pid;
-}
-
static call_frame_t *
get_call_frame_for_req (fuse_state_t *state)
{
@@ -998,6 +984,7 @@ fuse_setattr (xlator_t *this, fuse_in_header_t *finh, void *msg)
struct stat attr = {0, };
+ fuse_private_t *priv = NULL;
fuse_state_t *state = NULL;
int32_t ret = -1;
int32_t valid = 0;
@@ -1006,7 +993,22 @@ fuse_setattr (xlator_t *this, fuse_in_header_t *finh, void *msg)
ret = fuse_loc_fill (&state->loc, state, finh->nodeid, 0, NULL);
- set_lock_owner (state, this, fsi->lock_owner, (uint64_t) finh->pid);
+ /*
+ * This is just stub code demonstrating how to retrieve
+ * lock_owner in setattr, according to the FUSE proto.
+ * We do not make use of ATM. Its purpose is supporting
+ * mandatory locking, but getting that right is further
+ * down the road. Cf.
+ *
+ * http://thread.gmane.org/gmane.comp.file-systems.fuse.devel/
+ * 4962/focus=4982
+ *
+ * http://git.kernel.org/?p=linux/kernel/git/torvalds/
+ * linux-2.6.git;a=commit;h=v2.6.23-5896-gf333211
+ */
+ priv = this->private;
+ if (priv->proto_minor >= 9 && fsi->valid & FATTR_LOCKOWNER)
+ state->lk_owner = fsi->lock_owner;
if ((state->loc.inode == NULL) ||
(ret < 0)) {
@@ -1851,6 +1853,7 @@ fuse_readv (xlator_t *this, fuse_in_header_t *finh, void *msg)
{
struct fuse_read_in *fri = msg;
+ fuse_private_t *priv = NULL;
fuse_state_t *state = NULL;
fd_t *fd = NULL;
@@ -1862,7 +1865,10 @@ fuse_readv (xlator_t *this, fuse_in_header_t *finh, void *msg)
fd = FH_TO_FD (fri->fh);
state->fd = fd;
- set_lock_owner (state, this, fri->lock_owner, (uint64_t) finh->pid);
+ /* See comment by similar code in fuse_settatr */
+ priv = this->private;
+ if (priv->proto_minor >= 9 && fri->read_flags & FUSE_READ_LOCKOWNER)
+ state->lk_owner = fri->lock_owner;
gf_log ("glusterfs-fuse", GF_LOG_TRACE,
"%"PRIu64": READ (%p, size=%"PRIu32", offset=%"PRIu64")",
@@ -1935,7 +1941,10 @@ fuse_write (xlator_t *this, fuse_in_header_t *finh, void *msg)
vector.iov_base = msg;
vector.iov_len = fwi->size;
- set_lock_owner (state, this, fwi->lock_owner, (uint64_t) finh->pid);
+ /* See comment by similar code in fuse_settatr */
+ priv = this->private;
+ if (priv->proto_minor >= 9 && fwi->write_flags & FUSE_READ_LOCKOWNER)
+ state->lk_owner = fwi->lock_owner;
gf_log ("glusterfs-fuse", GF_LOG_TRACE,
"%"PRIu64": WRITE (%p, size=%"PRIu32", offset=%"PRId64")",
@@ -1975,7 +1984,7 @@ fuse_flush (xlator_t *this, fuse_in_header_t *finh, void *msg)
if (fd)
fd->flush_unique = finh->unique;
- set_lock_owner (state, this, ffi->lock_owner, (uint64_t) finh->pid);
+ state->lk_owner = ffi->lock_owner;
gf_log ("glusterfs-fuse", GF_LOG_TRACE,
"%"PRIu64": FLUSH %p", finh->unique, fd);
@@ -2001,8 +2010,6 @@ fuse_release (xlator_t *this, fuse_in_header_t *finh, void *msg)
fd = FH_TO_FD (fri->fh);
state->fd = fd;
- set_lock_owner (state, this, fri->lock_owner, (uint64_t) finh->pid);
-
#ifdef GF_LINUX_HOST_OS
/* This is an ugly Linux specific hack, relying on subtle
* implementation details.
@@ -2778,7 +2785,7 @@ fuse_getlk (xlator_t *this, fuse_in_header_t *finh, void *msg)
state->fd = fd;
convert_fuse_file_lock (&fli->lk, &lock);
- set_lock_owner (state, this, fli->owner, (uint64_t) finh->pid);
+ state->lk_owner = fli->owner;
gf_log ("glusterfs-fuse", GF_LOG_TRACE,
"%"PRIu64": GETLK %p", finh->unique, fd);
@@ -2851,7 +2858,7 @@ fuse_setlk (xlator_t *this, fuse_in_header_t *finh, void *msg)
state->fd = fd;
convert_fuse_file_lock (&fli->lk, &lock);
- set_lock_owner (state, this, fli->owner, (uint64_t) finh->pid);
+ state->lk_owner = fli->owner;
gf_log ("glusterfs-fuse", GF_LOG_TRACE,
"%"PRIu64": SETLK%s %p", finh->unique,