GFS2: Don't filter out I_FREEING inodes anymore

This patch basically reverts a very old patch from 2008,
7a9f53b3c1875bef22ad4588e818bc046ef183da, with the title
"Alternate gfs2_iget to avoid looking up inodes being freed".
The original patch was designed to avoid a deadlock caused by lock
ordering with try_rgrp_unlink. The patch forced the function to not
find inodes that were being removed by VFS. The problem is, that
made it impossible for nodes to delete their own unlinked dinodes
after a certain point in time, because the inode needed was not found
by this filtering process. There is no longer a need for the patch,
since function try_rgrp_unlink no longer locks the inode: All it does
is queue the glock onto the delete work_queue, so there should be no
more deadlock.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 4 insertions, 55 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 95a914524a39..689ddb09e159 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -37,61 +37,9 @@
 #include "super.h"
 #include "glops.h"
 
-struct gfs2_skip_data {
-	u64 no_addr;
-	int skipped;
-	int non_block;
-};
-
-static int iget_test(struct inode *inode, void *opaque)
-{
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_skip_data *data = opaque;
-
-	if (ip->i_no_addr == data->no_addr) {
-		if (data->non_block &&
-		    inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
-			data->skipped = 1;
-			return 0;
-		}
-		return 1;
-	}
-	return 0;
-}
-
-static int iget_set(struct inode *inode, void *opaque)
+struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
 {
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_skip_data *data = opaque;
-
-	if (data->skipped)
-		return -ENOENT;
-	inode->i_ino = (unsigned long)(data->no_addr);
-	ip->i_no_addr = data->no_addr;
-	return 0;
-}
-
-struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block)
-{
-	unsigned long hash = (unsigned long)no_addr;
-	struct gfs2_skip_data data;
-
-	data.no_addr = no_addr;
-	data.skipped = 0;
-	data.non_block = non_block;
-	return ilookup5(sb, hash, iget_test, &data);
-}
-
-static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
-			       int non_block)
-{
-	struct gfs2_skip_data data;
-	unsigned long hash = (unsigned long)no_addr;
-
-	data.no_addr = no_addr;
-	data.skipped = 0;
-	data.non_block = non_block;
-	return iget5_locked(sb, hash, iget_test, iget_set, &data);
+	return ilookup(sb, (unsigned long)no_addr);
 }
 
 /**
@@ -145,8 +93,9 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 	struct gfs2_glock *io_gl = NULL;
 	int error;
 
-	inode = gfs2_iget(sb, no_addr, non_block);
+	inode = iget_locked(sb, (unsigned long)no_addr);
 	ip = GFS2_I(inode);
+	ip->i_no_addr = no_addr;
 
 	if (!inode)
 		return ERR_PTR(-ENOMEM);