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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/xlator.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/xlator.h')
-rw-r--r--libglusterfs/src/xlator.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/libglusterfs/src/xlator.h b/libglusterfs/src/xlator.h
index ace73f2ed03..817eaddecfe 100644
--- a/libglusterfs/src/xlator.h
+++ b/libglusterfs/src/xlator.h
@@ -425,6 +425,14 @@ typedef int32_t (*fop_fallocate_cbk_t) (call_frame_t *frame,
struct iatt *preop_stbuf,
struct iatt *postop_stbuf, dict_t *xdata);
+typedef int32_t (*fop_discard_cbk_t) (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ struct iatt *preop_stbuf,
+ struct iatt *postop_stbuf, dict_t *xdata);
+
typedef int32_t (*fop_lookup_t) (call_frame_t *frame,
xlator_t *this,
loc_t *loc,
@@ -650,6 +658,13 @@ typedef int32_t (*fop_fallocate_t) (call_frame_t *frame,
size_t len,
dict_t *xdata);
+typedef int32_t (*fop_discard_t) (call_frame_t *frame,
+ xlator_t *this,
+ fd_t *fd,
+ off_t offset,
+ size_t len,
+ dict_t *xdata);
+
struct xlator_fops {
fop_lookup_t lookup;
fop_stat_t stat;
@@ -694,6 +709,7 @@ struct xlator_fops {
fop_fsetattr_t fsetattr;
fop_getspec_t getspec;
fop_fallocate_t fallocate;
+ fop_discard_t discard;
/* these entries are used for a typechecking hack in STACK_WIND _only_ */
fop_lookup_cbk_t lookup_cbk;
@@ -739,6 +755,7 @@ struct xlator_fops {
fop_fsetattr_cbk_t fsetattr_cbk;
fop_getspec_cbk_t getspec_cbk;
fop_fallocate_cbk_t fallocate_cbk;
+ fop_discard_cbk_t discard_cbk;
};
typedef int32_t (*cbk_forget_t) (xlator_t *this,