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authorBrian Foster <bfoster@redhat.com>2013-05-23 12:19:42 -0400
committerAnand Avati <avati@redhat.com>2013-06-13 14:37:43 -0700
commit17f287172413dc04244781aa5302a0e4f10e2777 (patch)
tree2acfc7097c92de32b19e82140befd8dc9fb2dad2 /xlators/mount/fuse
parentd1ccc4e400728d90f2ef7904661f53deb7199123 (diff)
glusterfs: discard (hole punch) support
Add support for the DISCARD file operation. Discard punches a hole in a file in the provided range. Block de-allocation is implemented via fallocate() (as requested via fuse and passed on to the brick fs) but a separate fop is created within gluster to emphasize the fact that discard changes file data (the discarded region is replaced with zeroes) and must invalidate caches where appropriate. BUG: 963678 Change-Id: I34633a0bfff2187afeab4292a15f3cc9adf261af Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-on: http://review.gluster.org/5090 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/mount/fuse')
-rw-r--r--xlators/mount/fuse/src/fuse-bridge.c18
1 files changed, 7 insertions, 11 deletions
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 59472b9..1b97d43 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -2669,10 +2669,13 @@ fuse_fallocate_resume(fuse_state_t *state)
state->finh->unique, state->fd, state->flags, state->size,
state->off);
- /* we only support KEEP_SIZE */
- FUSE_FOP(state, fuse_fallocate_cbk, GF_FOP_FALLOCATE, fallocate, state->fd,
- (state->flags & FALLOC_FL_KEEP_SIZE), state->off, state->size,
- state->xdata);
+ if (state->flags & FALLOC_FL_PUNCH_HOLE)
+ FUSE_FOP(state, fuse_fallocate_cbk, GF_FOP_DISCARD, discard,
+ state->fd, state->off, state->size, state->xdata);
+ else
+ FUSE_FOP(state, fuse_fallocate_cbk, GF_FOP_FALLOCATE, fallocate,
+ state->fd, (state->flags & FALLOC_FL_KEEP_SIZE),
+ state->off, state->size, state->xdata);
}
static void
@@ -2687,13 +2690,6 @@ fuse_fallocate(xlator_t *this, fuse_in_header_t *finh, void *msg)
state->flags = ffi->mode;
state->fd = FH_TO_FD(ffi->fh);
- /* discard TBD as separate FOP */
- if (state->flags & FALLOC_FL_PUNCH_HOLE) {
- send_fuse_err(this, finh, EOPNOTSUPP);
- free_fuse_state(state);
- return;
- }
-
fuse_resolve_fd_init(state, &state->resolve, state->fd);
fuse_resolve_and_resume(state, fuse_fallocate_resume);
}