diff options
| author | Brian Foster <bfoster@redhat.com> | 2013-05-23 12:19:42 -0400 |
|---|---|---|
| committer | Anand Avati <avati@redhat.com> | 2013-06-13 14:37:43 -0700 |
| commit | 17f287172413dc04244781aa5302a0e4f10e2777 (patch) | |
| tree | 2acfc7097c92de32b19e82140befd8dc9fb2dad2 /libglusterfs/src/syncop.c | |
| parent | d1ccc4e400728d90f2ef7904661f53deb7199123 (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 'libglusterfs/src/syncop.c')
| -rw-r--r-- | libglusterfs/src/syncop.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c index f57e8da5..9cceaf55 100644 --- a/libglusterfs/src/syncop.c +++ b/libglusterfs/src/syncop.c @@ -1948,6 +1948,36 @@ syncop_fallocate(xlator_t *subvol, fd_t *fd, int32_t keep_size, off_t offset, int +syncop_discard_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + struct syncargs *args = NULL; + + args = cookie; + + args->op_ret = op_ret; + args->op_errno = op_errno; + + __wake (args); + + return 0; +} + +int +syncop_discard(xlator_t *subvol, fd_t *fd, off_t offset, size_t len) +{ + struct syncargs args = {0, }; + + SYNCOP (subvol, (&args), syncop_discard_cbk, subvol->fops->discard, + fd, offset, len, NULL); + + errno = args.op_errno; + return args.op_ret; +} + + +int syncop_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, int op_errno, struct gf_flock *flock, dict_t *xdata) |