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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/defaults.h
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/defaults.h')
-rw-r--r--libglusterfs/src/defaults.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/libglusterfs/src/defaults.h b/libglusterfs/src/defaults.h
index bc2f6429b09..f3cbb3a4bb7 100644
--- a/libglusterfs/src/defaults.h
+++ b/libglusterfs/src/defaults.h
@@ -249,6 +249,12 @@ int32_t default_fallocate(call_frame_t *frame,
int32_t keep_size, off_t offset,
size_t len, dict_t *xdata);
+int32_t default_discard(call_frame_t *frame,
+ xlator_t *this,
+ fd_t *fd,
+ off_t offset,
+ size_t len, dict_t *xdata);
+
/* Resume */
int32_t default_getspec_resume (call_frame_t *frame,
xlator_t *this,
@@ -465,6 +471,11 @@ int32_t default_fallocate_resume(call_frame_t *frame,
int32_t keep_size, off_t offset,
size_t len, dict_t *xdata);
+int32_t default_discard_resume(call_frame_t *frame,
+ xlator_t *this,
+ fd_t *fd,
+ off_t offset,
+ size_t len, dict_t *xdata);
/* _cbk */
@@ -680,6 +691,9 @@ int32_t default_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
int32_t op_ret, int32_t op_errno, struct iatt *pre,
struct iatt *post, dict_t *xdata);
+int32_t default_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct iatt *pre,
+ struct iatt *post, dict_t *xdata);
int32_t
default_getspec_cbk (call_frame_t *frame, void *cookie, xlator_t *this,