afr: perform replace-brick in a synctask

Backport of http://review.gluster.org/#/c/12169/

Problem:
replace-brick setxattr is not performed inside a synctask. This can lead
to hangs if the setxattr is executed by epoll thread, as the epoll
thread will be waiting for replies to come where as epoll thread is the
thread that needs to epoll_ctl for reading from socket and listen.

Fix:
Move replace-brick to synctask to prevent epoll thread hang.

This patch is in line with the fix performed in
http://review.gluster.org/#/c/12163/

Change-Id: I7284930ead9b0adaa0257f21ec2d893fa5a7146f
BUG: 1262547
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: http://review.gluster.org/12172
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index 870d26b7689..6a14febec0a 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -760,6 +760,12 @@ typedef struct afr_spb_status {
         loc_t        *loc;
 } afr_spb_status_t;
 
+typedef struct afr_replace_brick_args {
+        call_frame_t *frame;
+        loc_t loc;
+        int rb_index;
+} afr_replace_brick_args_t;
+
 typedef struct afr_read_subvol_args {
         ia_type_t ia_type;
         uuid_t gfid;