From 2546b7f5bf1d747262d956cb233676c563423370 Mon Sep 17 00:00:00 2001
From: "Anand V. Avati" <avati@dev.gluster.com>
Date: Thu, 15 Jul 2010 03:50:12 -0700
Subject: Revert "dht: perform revalidate on one subvolume"

This reverts commit 97e060d04b6b86225264644ff8fef0459577a031.
---
 xlators/cluster/dht/src/dht-common.c | 125 ++++++++++++++++++++++++++++++-----
 1 file changed, 108 insertions(+), 17 deletions(-)

diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index dd2a3f3f1e1..be9c2b64afc 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -207,36 +207,120 @@ dht_revalidate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     struct iatt *postparent)
 {
         dht_local_t  *local         = NULL;
+        int           this_call_cnt = 0;
         call_frame_t *prev          = NULL;
+	dht_layout_t *layout        = NULL;
 	dht_conf_t   *conf          = NULL;
+	int           ret  = -1;
+	int           is_dir = 0;
+	int           is_linkfile = 0;
 
         local = frame->local;
         prev  = cookie;
 	conf = this->private;
 
-        if (op_ret == 0) {
+        LOCK (&frame->lock);
+        {
+		if (op_ret == -1) {
+			local->op_errno = op_errno;
+
+			if ((op_errno != ENOTCONN) 
+                            && (op_errno != ENOENT)
+                            && (op_errno != ESTALE)) {
+				gf_log (this->name, GF_LOG_DEBUG,
+					"subvolume %s returned -1 (%s)",
+					prev->this->name, strerror (op_errno));
+			}
+                        
+                        if (op_errno == ESTALE) {
+                                /* propogate the ESTALE to parent. 
+                                 * setting local->layout_mismatch would send
+                                 * ESTALE to parent. */
+                                local->layout_mismatch = 1;
+                        }
+
+			goto unlock;
+		}
+
+		if (stbuf->ia_type != local->inode->ia_type) {
+			gf_log (this->name, GF_LOG_DEBUG,
+				"mismatching filetypes 0%o v/s 0%o for %s",
+				(stbuf->ia_type), (local->inode->ia_type),
+				local->loc.path);
+
+			local->op_ret = -1;
+			local->op_errno = EINVAL;
+
+			goto unlock;
+		}
+
+		layout = local->layout;
+		
+		is_dir = check_is_dir (inode, stbuf, xattr);
+		is_linkfile = check_is_linkfile (inode, stbuf, xattr);
+		
+		if (is_linkfile) {
+			gf_log (this->name, GF_LOG_DEBUG,
+				"linkfile found in revalidate for %s",
+				local->loc.path);
+			local->layout_mismatch = 1;
+
+			goto unlock;
+		}
+
+		if (is_dir) {
+			ret = dht_layout_dir_mismatch (this, layout,
+						       prev->this, &local->loc,
+						       xattr);
+			if (ret != 0) {
+				gf_log (this->name, GF_LOG_DEBUG,
+					"mismatching layouts for %s", 
+					local->loc.path);
+			
+				local->layout_mismatch = 1;
+
+				goto unlock;
+			}
+		} 
+		
 		dht_iatt_merge (this, &local->stbuf, stbuf, prev->this);
                 dht_iatt_merge (this, &local->postparent, postparent,
                                 prev->this);
-
+		
+		local->op_ret = 0;
 		local->stbuf.ia_ino = local->ia_ino;
                 local->stbuf.ia_gen = local->loc.inode->generation;
 
                 if (local->loc.parent)
                         local->postparent.ia_ino = local->loc.parent->ino;
+
+		if (!local->xattr)
+			local->xattr = dict_ref (xattr);
 	}
+unlock:
+	UNLOCK (&frame->lock);
 
+        this_call_cnt = dht_frame_return (frame);
 
-        if (!IA_ISDIR (local->stbuf.ia_type)
-            && (local->hashed_subvol != local->cached_subvol)
-            && (local->stbuf.ia_nlink == 1)
-            && (conf->unhashed_sticky_bit)) {
-                local->stbuf.ia_prot.sticky = 1;
-        }
+        if (is_last_call (this_call_cnt)) {
+		if (!IA_ISDIR (local->stbuf.ia_type)
+		    && (local->hashed_subvol != local->cached_subvol)
+		    && (local->stbuf.ia_nlink == 1)
+		    && (conf->unhashed_sticky_bit)) {
+			local->stbuf.ia_prot.sticky = 1;
+		}
 
-        DHT_STACK_UNWIND (lookup, frame, op_ret, op_errno,
-                          inode, &local->stbuf, xattr,
-                          &local->postparent);
+		if (local->layout_mismatch) {
+			local->op_ret = -1;
+			local->op_errno = ESTALE;
+		}
+
+                WIPE (&local->postparent);
+
+		DHT_STACK_UNWIND (lookup, frame, local->op_ret, local->op_errno,
+				  local->inode, &local->stbuf, local->xattr,
+                                  &local->postparent);
+	}
 
         return 0;
 }
@@ -771,19 +855,26 @@ dht_lookup (call_frame_t *frame, xlator_t *this,
 
 		local->inode    = inode_ref (loc->inode);
 		local->ia_ino   = loc->inode->ino;
-
-
+		
+		local->call_cnt = layout->cnt;
+		call_cnt = local->call_cnt;
+		
 		/* NOTE: we don't require 'trusted.glusterfs.dht.linkto' attribute,
 		 *       revalidates directly go to the cached-subvolume.
 		 */
 		ret = dict_set_uint32 (local->xattr_req, 
 				       "trusted.glusterfs.dht", 4 * 4);
 
-                subvol = layout->list[0].xlator;
+		for (i = 0; i < layout->cnt; i++) {
+			subvol = layout->list[i].xlator;
+			
+			STACK_WIND (frame, dht_revalidate_cbk,
+				    subvol, subvol->fops->lookup,
+				    loc, local->xattr_req);
 
-                STACK_WIND (frame, dht_revalidate_cbk,
-                            subvol, subvol->fops->lookup,
-                            loc, local->xattr_req);
+			if (!--call_cnt)
+				break;
+		}
         } else {
         do_fresh_lookup:
 		/* TODO: remove the hard-coding */
-- 
cgit