From c9676d181de6475a045f0fa7fd18e951166a07cc Mon Sep 17 00:00:00 2001
From: "Anand V. Avati" <avati@dev.gluster.com>
Date: Mon, 7 Jun 2010 00:28:22 -0700
Subject: Revert "dht: perform revalidate on one subvolume"

This reverts commit 553b13789cc7c9a76cbac67d962763396f224165.
---
 xlators/cluster/dht/src/dht-common.c | 122 ++++++++++++++++++++++++++++++-----
 1 file changed, 106 insertions(+), 16 deletions(-)

diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index 601fa956389..b0674f18e91 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -202,36 +202,119 @@ dht_revalidate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     struct stat *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 (S_IFMT & (stbuf->st_mode ^ local->inode->st_mode)) {
+			gf_log (this->name, GF_LOG_DEBUG,
+				"mismatching filetypes 0%o v/s 0%o for %s",
+				(stbuf->st_mode & S_IFMT),
+				(local->inode->st_mode & S_IFMT),
+				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_stat_merge (this, &local->stbuf, stbuf, prev->this);
                 dht_stat_merge (this, &local->postparent, postparent,
                                 prev->this);
-
+		
+		local->op_ret = 0;
 		local->stbuf.st_ino = local->st_ino;
                 local->stbuf.st_dev = local->loc.inode->generation;
 
                 if (local->loc.parent)
                         local->postparent.st_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 (!S_ISDIR (local->stbuf.st_mode)
-            && (local->hashed_subvol != local->cached_subvol)
-            && (local->stbuf.st_nlink == 1)
-            && (conf->unhashed_sticky_bit)) {
+        if (is_last_call (this_call_cnt)) {
+		if (!S_ISDIR (local->stbuf.st_mode)
+		    && (local->hashed_subvol != local->cached_subvol)
+		    && (local->stbuf.st_nlink == 1)
+		    && (conf->unhashed_sticky_bit)) {
 			local->stbuf.st_mode |= S_ISVTX;
-        }
+		}
 
-        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;
+		}
+			
+		DHT_STACK_UNWIND (lookup, frame, local->op_ret, local->op_errno,
+				  local->inode, &local->stbuf, local->xattr,
+                                  &local->postparent);
+	}
 
         return 0;
 }
@@ -757,19 +840,26 @@ dht_lookup (call_frame_t *frame, xlator_t *this,
 
 		local->inode    = inode_ref (loc->inode);
 		local->st_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