From 3d65e0831f50b6daf7c697cfce5abcc0a95b9e4b Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Sat, 12 May 2012 12:05:19 +0000
Subject: linux/2.6.37: R.I.P.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31687 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../102-overlayfs_fix_readdir_deadlock.patch       | 124 ---------------------
 1 file changed, 124 deletions(-)
 delete mode 100644 target/linux/generic/patches-2.6.37/102-overlayfs_fix_readdir_deadlock.patch

(limited to 'target/linux/generic/patches-2.6.37/102-overlayfs_fix_readdir_deadlock.patch')

diff --git a/target/linux/generic/patches-2.6.37/102-overlayfs_fix_readdir_deadlock.patch b/target/linux/generic/patches-2.6.37/102-overlayfs_fix_readdir_deadlock.patch
deleted file mode 100644
index 188be3d889..0000000000
--- a/target/linux/generic/patches-2.6.37/102-overlayfs_fix_readdir_deadlock.patch
+++ /dev/null
@@ -1,124 +0,0 @@
---- a/fs/overlayfs/overlayfs.c
-+++ b/fs/overlayfs/overlayfs.c
-@@ -248,8 +248,7 @@ static struct ovl_cache_entry *ovl_cache
- }
- 
- static struct ovl_cache_entry *ovl_cache_entry_new(const char *name, int len,
--						   u64 ino, unsigned int d_type,
--						   bool is_whiteout)
-+						   u64 ino, unsigned int d_type)
- {
- 	struct ovl_cache_entry *p;
- 
-@@ -262,7 +261,7 @@ static struct ovl_cache_entry *ovl_cache
- 		p->len = len;
- 		p->type = d_type;
- 		p->ino = ino;
--		p->is_whiteout = is_whiteout;
-+		p->is_whiteout = false;
- 	}
- 
- 	return p;
-@@ -270,7 +269,7 @@ static struct ovl_cache_entry *ovl_cache
- 
- static int ovl_cache_entry_add_rb(struct ovl_readdir_data *rdd,
- 				  const char *name, int len, u64 ino,
--				  unsigned int d_type, bool is_whiteout)
-+				  unsigned int d_type)
- {
- 	struct rb_node **newp = &rdd->root->rb_node;
- 	struct rb_node *parent = NULL;
-@@ -291,11 +290,18 @@ static int ovl_cache_entry_add_rb(struct
- 			return 0;
- 	}
- 
--	p = ovl_cache_entry_new(name, len, ino, d_type, is_whiteout);
-+	p = ovl_cache_entry_new(name, len, ino, d_type);
- 	if (p == NULL)
- 		return -ENOMEM;
- 
--	list_add_tail(&p->l_node, rdd->list);
-+	/*
-+	 * Add links before other types to be able to quicky mark
-+	 * any whiteout entries
-+	 */
-+	if (d_type == DT_LNK)
-+		list_add(&p->l_node, rdd->list);
-+	else
-+		list_add_tail(&p->l_node, rdd->list);
- 	rb_link_node(&p->node, parent, newp);
- 	rb_insert_color(&p->node, rdd->root);
- 
-@@ -313,7 +319,7 @@ static int ovl_fill_lower(void *buf, con
- 	if (p) {
- 		list_move_tail(&p->l_node, rdd->middle);
- 	} else {
--		p = ovl_cache_entry_new(name, namelen, ino, d_type, false);
-+		p = ovl_cache_entry_new(name, namelen, ino, d_type);
- 		if (p == NULL)
- 			rdd->err = -ENOMEM;
- 		else
-@@ -338,26 +344,9 @@ static int ovl_fill_upper(void *buf, con
- 			  loff_t offset, u64 ino, unsigned int d_type)
- {
- 	struct ovl_readdir_data *rdd = buf;
--	bool is_whiteout = false;
- 
- 	rdd->count++;
--	if (d_type == DT_LNK) {
--		struct dentry *dentry;
--
--		dentry = lookup_one_len(name, rdd->dir, namelen);
--		if (IS_ERR(dentry)) {
--			rdd->err = PTR_ERR(dentry);
--			goto out;
--		}
--		is_whiteout = ovl_is_whiteout(dentry);
--		dput(dentry);
--	}
--
--	rdd->err = ovl_cache_entry_add_rb(rdd, name, namelen, ino, d_type,
--					  is_whiteout);
--
--out:
--	return rdd->err;
-+	return ovl_cache_entry_add_rb(rdd, name, namelen, ino, d_type);
- }
- 
- static int ovl_dir_read(struct path *realpath, struct ovl_readdir_data *rdd,
-@@ -423,6 +412,26 @@ static void ovl_dir_reset(struct file *f
- 	}
- }
- 
-+static void ovl_dir_mark_whiteouts(struct ovl_readdir_data *rdd)
-+{
-+	struct ovl_cache_entry *p;
-+	struct dentry *dentry;
-+
-+	mutex_lock(&rdd->dir->d_inode->i_mutex);
-+	list_for_each_entry(p, rdd->list, l_node) {
-+		if (p->type != DT_LNK)
-+			break;
-+
-+		dentry = lookup_one_len(p->name, rdd->dir, p->len);
-+		if (IS_ERR(dentry))
-+			continue;
-+
-+		p->is_whiteout = ovl_is_whiteout(dentry);
-+		dput(dentry);
-+	}
-+	mutex_unlock(&rdd->dir->d_inode->i_mutex);
-+}
-+
- static int ovl_dir_read_merged(struct path *upperpath, struct path *lowerpath,
- 			       struct ovl_readdir_data *rdd)
- {
-@@ -436,6 +445,8 @@ static int ovl_dir_read_merged(struct pa
- 		err = ovl_dir_read(upperpath, rdd, ovl_fill_upper);
- 		if (err)
- 			goto out;
-+
-+		ovl_dir_mark_whiteouts(rdd);
- 	}
- 	/*
- 	 * Insert lowerpath entries before upperpath ones, this allows
-- 
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