From 17f287172413dc04244781aa5302a0e4f10e2777 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Thu, 23 May 2013 12:19:42 -0400 Subject: 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 Reviewed-on: http://review.gluster.org/5090 Tested-by: Gluster Build System Reviewed-by: Anand Avati --- libglusterfs/src/xlator.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'libglusterfs/src/xlator.h') diff --git a/libglusterfs/src/xlator.h b/libglusterfs/src/xlator.h index ace73f2e..817eadde 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, -- cgit