summaryrefslogtreecommitdiffstats
path: root/libglusterfs/src/call-stub.c
diff options
context:
space:
mode:
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.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/call-stub.c')
-rw-r--r--libglusterfs/src/call-stub.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/libglusterfs/src/call-stub.c b/libglusterfs/src/call-stub.c
index 2bb993411b8..2f07a0074c5 100644
--- a/libglusterfs/src/call-stub.c
+++ b/libglusterfs/src/call-stub.c
@@ -2186,6 +2186,61 @@ out:
}
+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)
+{
+ call_stub_t *stub = NULL;
+
+ GF_VALIDATE_OR_GOTO ("call-stub", frame, out);
+
+ stub = stub_new (frame, 0, GF_FOP_DISCARD);
+ GF_VALIDATE_OR_GOTO ("call-stub", stub, out);
+
+ stub->fn_cbk.discard = fn;
+
+ stub->args_cbk.op_ret = op_ret;
+ stub->args_cbk.op_errno = op_errno;
+
+ if (statpre)
+ stub->args_cbk.prestat = *statpre;
+ if (statpost)
+ stub->args_cbk.poststat = *statpost;
+ if (xdata)
+ stub->args_cbk.xdata = dict_ref (xdata);
+out:
+ return stub;
+}
+
+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 *stub = NULL;
+
+ GF_VALIDATE_OR_GOTO ("call-stub", frame, out);
+ GF_VALIDATE_OR_GOTO ("call-stub", fn, out);
+
+ stub = stub_new (frame, 1, GF_FOP_DISCARD);
+ GF_VALIDATE_OR_GOTO ("call-stub", stub, out);
+
+ stub->fn.discard = fn;
+
+ if (fd)
+ stub->args.fd = fd_ref (fd);
+
+ stub->args.offset = offset;
+ stub->args.size = len;
+
+ if (xdata)
+ stub->args.xdata = dict_ref (xdata);
+out:
+ return stub;
+
+}
+
static void
call_resume_wind (call_stub_t *stub)
{
@@ -2408,6 +2463,11 @@ call_resume_wind (call_stub_t *stub)
stub->args.offset, stub->args.size,
stub->args.xdata);
break;
+ case GF_FOP_DISCARD:
+ stub->fn.discard(stub->frame, stub->frame->this,
+ stub->args.fd, stub->args.offset,
+ stub->args.size, stub->args.xdata);
+ break;
default:
gf_log_callingfn ("call-stub", GF_LOG_ERROR,
"Invalid value of FOP (%d)",
@@ -2606,6 +2666,10 @@ call_resume_unwind (call_stub_t *stub)
STUB_UNWIND(stub, fallocate, &stub->args_cbk.prestat,
&stub->args_cbk.poststat, stub->args_cbk.xdata);
break;
+ case GF_FOP_DISCARD:
+ STUB_UNWIND(stub, discard, &stub->args_cbk.prestat,
+ &stub->args_cbk.poststat, stub->args_cbk.xdata);
+ break;
default:
gf_log_callingfn ("call-stub", GF_LOG_ERROR,
"Invalid value of FOP (%d)",