nfs: send lookup if inode_ctx is not set

During resolving of an entry or inode, if inode ctx
was not set, we will send a lookup.

This patch also make sure that inode_ctx will be created
after every inode_link.

Back port of>
>Change-Id: I137a7e2510635ff4ea6d007b671961341f89c949
>BUG: 1297311
>Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>
>Reviewed-on: http://review.gluster.org/13224
>Reviewed-by: soumya k <skoduri@redhat.com>
>Tested-by: NetBSD Build System <jenkins@build.gluster.org>
>Reviewed-by: Dan Lambright <dlambrig@redhat.com>
>Tested-by: Dan Lambright <dlambrig@redhat.com>

Change-Id: I2034521e23ef24ac75f80aff736abf5811fc0de6
BUG: 1306131
Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>
Reviewed-on: http://review.gluster.org/13413
Smoke: Gluster Build System <jenkins@build.gluster.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>

4 files changed, 28 insertions, 15 deletions

diff --git a/xlators/nfs/server/src/mount3.c b/xlators/nfs/server/src/mount3.c
index 1ca76b2e897..c10232e20e0 100644
--- a/xlators/nfs/server/src/mount3.c
+++ b/xlators/nfs/server/src/mount3.c
@@ -1062,8 +1062,9 @@ __mnt3_resolve_export_subdir_comp (mnt3_resolve_t *mres)
         /* Wipe the contents of the previous component */
         gf_uuid_copy (gfid, mres->resolveloc.inode->gfid);
         nfs_loc_wipe (&mres->resolveloc);
-        ret = nfs_entry_loc_fill (mres->exp->vol->itable, gfid, nextcomp,
-                                  &mres->resolveloc, NFS_RESOLVE_CREATE);
+        ret = nfs_entry_loc_fill (mres->mstate->nfsx, mres->exp->vol->itable,
+                                  gfid, nextcomp, &mres->resolveloc,
+                                  NFS_RESOLVE_CREATE);
         if ((ret < 0) && (ret != -2)) {
                 gf_msg (GF_MNT, GF_LOG_ERROR, EFAULT,
                         NFS_MSG_RESOLVE_INODE_FAIL, "Failed to resolve and "
@@ -1123,6 +1124,7 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         int                     authcode = 0;
         char                    *authorized_host = NULL;
         char                    *authorized_path = NULL;
+        inode_t                 *linked_inode = NULL;
 
         mres = frame->local;
         ms = mres->mstate;
@@ -1139,8 +1141,12 @@ mnt3_resolve_subdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 goto err;
         }
 
-        inode_link (mres->resolveloc.inode, mres->resolveloc.parent,
-                    mres->resolveloc.name, buf);
+        linked_inode = inode_link (mres->resolveloc.inode,
+                                   mres->resolveloc.parent,
+                                   mres->resolveloc.name, buf);
+
+        if (linked_inode)
+                nfs_fix_generation (this, linked_inode);
 
         nfs3_fh_build_child_fh (&mres->parentfh, buf, &fh);
         if (strlen (mres->remainingdir) <= 0) {
@@ -1371,8 +1377,9 @@ __mnt3_resolve_subdir (mnt3_resolve_t *mres)
                 goto err;
 
         rootgfid[15] = 1;
-        ret = nfs_entry_loc_fill (mres->exp->vol->itable, rootgfid, firstcomp,
-                                  &mres->resolveloc, NFS_RESOLVE_CREATE);
+        ret = nfs_entry_loc_fill (mres->mstate->nfsx, mres->exp->vol->itable,
+                                  rootgfid, firstcomp, &mres->resolveloc,
+                                  NFS_RESOLVE_CREATE);
         if ((ret < 0) && (ret != -2)) {
                 gf_msg (GF_MNT, GF_LOG_ERROR, EFAULT,
                         NFS_MSG_RESOLVE_INODE_FAIL, "Failed to resolve and "
diff --git a/xlators/nfs/server/src/nfs-common.c b/xlators/nfs/server/src/nfs-common.c
index b6791566c2c..cfb0edd1294 100644
--- a/xlators/nfs/server/src/nfs-common.c
+++ b/xlators/nfs/server/src/nfs-common.c
@@ -331,8 +331,8 @@ err:
  * On other errors, return -3. 0 on success.
  */
 int
-nfs_entry_loc_fill (inode_table_t *itable, uuid_t pargfid, char *entry,
-                    loc_t *loc, int how)
+nfs_entry_loc_fill (xlator_t *this, inode_table_t *itable, uuid_t pargfid,
+                    char *entry, loc_t *loc, int how)
 {
         inode_t         *parent = NULL;
         inode_t         *entryinode = NULL;
@@ -347,21 +347,22 @@ nfs_entry_loc_fill (inode_table_t *itable, uuid_t pargfid, char *entry,
 
         ret = -1;
         /* Will need hard resolution now */
-        if (!parent)
+        if (!parent || inode_ctx_get (parent, this, NULL))
                 goto err;
 
         gf_uuid_copy (loc->pargfid, pargfid);
 
         ret = -2;
         entryinode = inode_grep (itable, parent, entry);
-        if (!entryinode) {
+        if (!entryinode || inode_ctx_get (entryinode, this, NULL)) {
                 if (how == NFS_RESOLVE_CREATE) {
                         /* Even though we'll create the inode and the loc for
                          * a missing inode, we still need to return -2 so
                          * that the caller can use the filled loc to call
                          * lookup.
                          */
-                        entryinode = inode_new (itable);
+                        if (!entryinode)
+                                entryinode = inode_new (itable);
                         /* Cannot change ret because that must
                          * continue to have -2.
                          */
diff --git a/xlators/nfs/server/src/nfs-common.h b/xlators/nfs/server/src/nfs-common.h
index 401484c0f3c..01b49c1eb7a 100644
--- a/xlators/nfs/server/src/nfs-common.h
+++ b/xlators/nfs/server/src/nfs-common.h
@@ -64,8 +64,8 @@ extern int
 nfs_ino_loc_fill (inode_table_t *itable, uuid_t gfid, loc_t *l);
 
 extern int
-nfs_entry_loc_fill (inode_table_t *itable, uuid_t pargfid, char *entry,
-                    loc_t *loc, int how);
+nfs_entry_loc_fill (xlator_t *this, inode_table_t *itable, uuid_t pargfid,
+                    char *entry, loc_t *loc, int how);
 
 extern int
 nfs_root_loc_fill (inode_table_t *itable, loc_t *loc);
diff --git a/xlators/nfs/server/src/nfs3-helpers.c b/xlators/nfs/server/src/nfs3-helpers.c
index 985d08b01eb..ed673a12489 100644
--- a/xlators/nfs/server/src/nfs3-helpers.c
+++ b/xlators/nfs/server/src/nfs3-helpers.c
@@ -3660,6 +3660,7 @@ nfs3_fh_resolve_entry_lookup_cbk (call_frame_t *frame, void *cookie,
         linked_inode = inode_link (inode, cs->resolvedloc.parent,
                         cs->resolvedloc.name, buf);
         if (linked_inode) {
+                nfs_fix_generation (this, linked_inode);
                 inode_lookup (linked_inode);
                 inode_unref (cs->resolvedloc.inode);
                 cs->resolvedloc.inode = linked_inode;
@@ -3702,6 +3703,7 @@ nfs3_fh_resolve_inode_lookup_cbk (call_frame_t *frame, void *cookie,
         linked_inode = inode_link (inode, cs->resolvedloc.parent,
                                    cs->resolvedloc.name, buf);
         if (linked_inode) {
+                nfs_fix_generation (this, linked_inode);
                 inode_lookup (linked_inode);
 		inode_unref (cs->resolvedloc.inode);
 		cs->resolvedloc.inode = linked_inode;
@@ -3771,7 +3773,7 @@ nfs3_fh_resolve_entry_hard (nfs3_call_state_t *cs)
                       ", entry: %s", uuid_utoa (cs->resolvefh.gfid),
                       cs->resolventry);
 
-        ret = nfs_entry_loc_fill (cs->vol->itable, cs->resolvefh.gfid,
+        ret = nfs_entry_loc_fill (cs->nfsx, cs->vol->itable, cs->resolvefh.gfid,
                                   cs->resolventry, &cs->resolvedloc,
                                   NFS_RESOLVE_CREATE);
 
@@ -3812,14 +3814,17 @@ nfs3_fh_resolve_inode (nfs3_call_state_t *cs)
 {
         inode_t         *inode = NULL;
         int             ret = -EFAULT;
+        xlator_t        *this = NULL;
 
         if (!cs)
                 return ret;
 
+        this = cs->nfsx;
         gf_msg_trace (GF_NFS3, 0, "FH needs inode resolution");
         gf_uuid_copy (cs->resolvedloc.gfid, cs->resolvefh.gfid);
+
         inode = inode_find (cs->vol->itable, cs->resolvefh.gfid);
-        if (!inode)
+        if (!inode || inode_ctx_get (inode, this, NULL))
                 ret = nfs3_fh_resolve_inode_hard (cs);
         else
                 ret = nfs3_fh_resolve_inode_done (cs, inode);