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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 /libglusterfs/src/syncop.c
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 'libglusterfs/src/syncop.c')
-rw-r--r--libglusterfs/src/syncop.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c
index f57e8da5a72..9cceaf55c5c 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)