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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/call-stub.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/call-stub.h')
-rw-r--r--libglusterfs/src/call-stub.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/libglusterfs/src/call-stub.h b/libglusterfs/src/call-stub.h
index d940fe6f173..f0872b1219a 100644
--- a/libglusterfs/src/call-stub.h
+++ b/libglusterfs/src/call-stub.h
@@ -70,6 +70,7 @@ typedef struct {
fop_setattr_t setattr;
fop_fsetattr_t fsetattr;
fop_fallocate_t fallocate;
+ fop_discard_t discard;
} fn;
union {
@@ -115,6 +116,7 @@ typedef struct {
fop_setattr_cbk_t setattr;
fop_fsetattr_cbk_t fsetattr;
fop_fallocate_cbk_t fallocate;
+ fop_discard_cbk_t discard;
} fn_cbk;
struct {
@@ -729,6 +731,20 @@ fop_fallocate_cbk_stub(call_frame_t *frame,
struct iatt *statpre, struct iatt *statpost,
dict_t *xdata);
+call_stub_t *
+fop_discard_stub(call_frame_t *frame,
+ fop_discard_t fn,
+ fd_t *fd,
+ off_t offset,
+ size_t len, dict_t *xdata);
+
+call_stub_t *
+fop_discard_cbk_stub(call_frame_t *frame,
+ fop_discard_cbk_t fn,
+ int32_t op_ret, int32_t op_errno,
+ struct iatt *statpre, struct iatt *statpost,
+ dict_t *xdata);
+
void call_resume (call_stub_t *stub);
void call_stub_destroy (call_stub_t *stub);
void call_unwind_error (call_stub_t *stub, int op_ret, int op_errno);