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authorRaghavendra Bhat <raghavendra@redhat.com>2015-06-12 15:12:05 +0530
committerNiels de Vos <ndevos@redhat.com>2015-07-02 02:15:54 -0700
commitc1a8ae20bd055227921d199b952582eca4104f67 (patch)
tree8e56a6c2c4da95d00212408e25171c7e0c800e9b /libglusterfs
parente7f2547f89dbcd90cdb3714f63620a36bdc2ef3a (diff)
libgfapi: send explicit lookups on inodes linked in readdirp
If the inode is linked via readdirp, then the consuners of gfapi which are using handles (got either in lookup or readdirp) might not send an explicit lookup on that object again (ex: NFS, samba, USS). If there is a replicate volume where the replicas of the object are not in sync, then readdirp followed by fops might lead data being served from the subvolume which is not in sync with latest data. And since lookup is needed to trigger self-heal on that object the consumers might keep getting wrong data until an explicit lookup is not done. Fuse handles this situation by sending an explicit lookup by itself (fuse xlator) on those inodes which are linked via readdirp, whenever a fop comes on that inode. The same procedure is done in gfapi as well to address this situation. Thanks to shyam(srangana@redhat.com) for valuable inputs Change-Id: I64f0591495dddc1dea7f8dc319f2558a7e342871 BUG: 1236009 Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com> Reviewed-on: http://review.gluster.org/11236 Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Niels de Vos <ndevos@redhat.com>
Diffstat (limited to 'libglusterfs')
-rw-r--r--libglusterfs/src/inode.c31
-rw-r--r--libglusterfs/src/inode.h6
2 files changed, 37 insertions, 0 deletions
diff --git a/libglusterfs/src/inode.c b/libglusterfs/src/inode.c
index f3dd48653df..f660effcc7c 100644
--- a/libglusterfs/src/inode.c
+++ b/libglusterfs/src/inode.c
@@ -1816,6 +1816,37 @@ out:
return inode;
}
+void
+inode_set_need_lookup (inode_t *inode, xlator_t *this)
+{
+ uint64_t need_lookup = 1;
+
+ if (!inode | !this)
+ return;
+
+ inode_ctx_set (inode, this, &need_lookup);
+
+ return;
+}
+
+gf_boolean_t
+inode_needs_lookup (inode_t *inode, xlator_t *this)
+{
+ uint64_t need_lookup = 0;
+ gf_boolean_t ret = _gf_false;
+
+ if (!inode || !this)
+ return ret;
+
+ inode_ctx_get (inode, this, &need_lookup);
+ if (need_lookup) {
+ ret = _gf_true;
+ need_lookup = 0;
+ inode_ctx_set (inode, this, &need_lookup);
+ }
+
+ return ret;
+}
int
__inode_ctx_set2 (inode_t *inode, xlator_t *xlator, uint64_t *value1_p,
diff --git a/libglusterfs/src/inode.h b/libglusterfs/src/inode.h
index 3a7aa063920..633e771fc3d 100644
--- a/libglusterfs/src/inode.h
+++ b/libglusterfs/src/inode.h
@@ -267,4 +267,10 @@ inode_ctx_merge (fd_t *fd, inode_t *inode, inode_t *linked_inode);
int
inode_is_linked (inode_t *inode);
+void
+inode_set_need_lookup (inode_t *inode, xlator_t *this);
+
+gf_boolean_t
+inode_needs_lookup (inode_t *inode, xlator_t *this);
+
#endif /* _INODE_H */