cluster/afr: Perform data self-heal for non regular files

RCA:
Data self-heal for non regular files open the files
and then proceeds using that fd. This approach
does not work for symlinks because open on symlink opens
the file resolved by it.

Fix:
If the file is not a regular file then perform self-heal using
loc. It needs to get 'big' lock and then perform lookup to get
changelog then erase data part of chagelog, then unlock.

Test cases:
Automated at
https://github.com/pranithk/gluster-tests/blob/master/afr/special-file-self-heal-test.sh

Change-Id: I924a922f5135872efe2cccf2e712ada082c5689f
BUG: 811317
Signed-off-by: Pranith Kumar K <pranithk@gluster.com>
Reviewed-on: http://review.gluster.com/3724
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/xlators/cluster/afr/src/afr-self-heal-common.h b/xlators/cluster/afr/src/afr-self-heal-common.h
index cea554670b5..6eabd1766c0 100644
--- a/xlators/cluster/afr/src/afr-self-heal-common.h
+++ b/xlators/cluster/afr/src/afr-self-heal-common.h
@@ -125,4 +125,8 @@ afr_children_intersection_get (int32_t *set1, int32_t *set2,
 int
 afr_get_no_xattr_dir_read_child (xlator_t *this, int32_t *success_children,
                                  struct iatt *bufs);
+int
+afr_sh_erase_pending (call_frame_t *frame, xlator_t *this,
+                      afr_transaction_type type, afr_fxattrop_cbk_t cbk,
+                      int (*finish)(call_frame_t *frame, xlator_t *this));
 #endif /* __AFR_SELF_HEAL_COMMON_H__ */