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/performance/open-behind/src/open-behind.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 'xlators/performance/open-behind/src/open-behind.c')
| -rw-r--r-- | xlators/performance/open-behind/src/open-behind.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/xlators/performance/open-behind/src/open-behind.c b/xlators/performance/open-behind/src/open-behind.c index 5ac813132eb..26b684e888c 100644 --- a/xlators/performance/open-behind/src/open-behind.c +++ b/xlators/performance/open-behind/src/open-behind.c @@ -701,6 +701,25 @@ err: } int +ob_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + call_stub_t *stub; + + stub = fop_discard_stub(frame, default_discard_resume, fd, offset, len, + xdata); + if (!stub) + goto err; + + open_and_resume(this, fd, stub); + + return 0; +err: + STACK_UNWIND_STRICT(discard, frame, -1, ENOMEM, NULL, NULL, NULL); + return 0; +} + +int ob_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc, int xflags, dict_t *xdata) { @@ -922,6 +941,7 @@ struct xlator_fops fops = { .fxattrop = ob_fxattrop, .fsetattr = ob_fsetattr, .fallocate = ob_fallocate, + .discard = ob_discard, .unlink = ob_unlink, .rename = ob_rename, .lk = ob_lk, |