libglusterfs/inode.c: add inode_resolve

inode_resolve takes an itable and path as arguments and returns either
NULL or the inode corresponding to the path

Change-Id: Id42d62cce6b04dbfec7d606120b09a1e54ab484e
BUG: 802905
Signed-off-by: Raghavendra G <raghavendra@gluster.com>
Reviewed-on: http://review.gluster.com/3021
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra Bhat <raghavendrabhat@gluster.com>
Reviewed-by: Mohammed Junaid <junaid@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>

2 files changed, 47 insertions, 0 deletions

diff --git a/libglusterfs/src/inode.c b/libglusterfs/src/inode.c
index 08bedf8fa3e..7a50fe22861 100644
--- a/libglusterfs/src/inode.c
+++ b/libglusterfs/src/inode.c
@@ -660,6 +660,50 @@ inode_grep (inode_table_t *table, inode_t *parent, const char *name)
         return inode;
 }
 
+
+inode_t *
+inode_resolve (inode_table_t *table, char *path)
+{
+        char    *tmp   = NULL, *bname = NULL, *str = NULL, *saveptr = NULL;
+        inode_t *inode = NULL, *parent = NULL;
+
+        if ((path == NULL) || (table == NULL)) {
+                goto out;
+        }
+
+        parent = inode_ref (table->root);
+        str = tmp = gf_strdup (path);
+
+        while (1) {
+                bname = strtok_r (str, "/", &saveptr);
+                if (bname == NULL) {
+                        break;
+                }
+
+                if (inode != NULL) {
+                        inode_unref (inode);
+                }
+
+                inode = inode_grep (table, parent, bname);
+                if (inode == NULL) {
+                        break;
+                }
+
+                if (parent != NULL) {
+                        inode_unref (parent);
+                }
+
+                parent = inode_ref (inode);
+                str = NULL;
+        }
+
+        inode_unref (parent);
+        GF_FREE (tmp);
+out:
+        return inode;
+}
+
+
 int
 inode_grep_for_gfid (inode_table_t *table, inode_t *parent, const char *name,
                      uuid_t gfid, ia_type_t *type)
diff --git a/libglusterfs/src/inode.h b/libglusterfs/src/inode.h
index 5dced800616..f6401c5b9b1 100644
--- a/libglusterfs/src/inode.h
+++ b/libglusterfs/src/inode.h
@@ -180,6 +180,9 @@ int
 inode_ctx_del2 (inode_t *inode, xlator_t *xlator, uint64_t *value1,
                 uint64_t *value2);
 
+inode_t *
+inode_resolve (inode_table_t *table, char *path);
+
 #define __inode_ctx_set(i,x,v_p) __inode_ctx_set2(i,x,v_p,0)
 #define inode_ctx_set(i,x,v_p) inode_ctx_set2(i,x,v_p,0)