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 /xlators/debug/io-stats | |
| 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 'xlators/debug/io-stats')
| -rw-r--r-- | xlators/debug/io-stats/src/io-stats.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/xlators/debug/io-stats/src/io-stats.c b/xlators/debug/io-stats/src/io-stats.c index 5bb0e9d618c..4f27a2e418f 100644 --- a/xlators/debug/io-stats/src/io-stats.c +++ b/xlators/debug/io-stats/src/io-stats.c @@ -1736,6 +1736,18 @@ io_stats_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int +io_stats_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + UPDATE_PROFILE_STATS(frame, DISCARD); + STACK_UNWIND_STRICT(discard, frame, op_ret, op_errno, prebuf, postbuf, + xdata); + return 0; +} + + +int io_stats_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, struct gf_flock *lock, dict_t *xdata) { @@ -2416,6 +2428,20 @@ io_stats_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode, return 0; } + +int +io_stats_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + START_FOP_LATENCY(frame); + + STACK_WIND(frame, io_stats_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, xdata); + + return 0; +} + + int io_stats_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t cmd, struct gf_flock *lock, dict_t *xdata) @@ -2843,6 +2869,7 @@ struct xlator_fops fops = { .setattr = io_stats_setattr, .fsetattr = io_stats_fsetattr, .fallocate = io_stats_fallocate, + .discard = io_stats_discard, }; struct xlator_cbks cbks = { |