X-Git-Url: https://git.archive.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Fgeneric-2.6%2Fpatches-2.6.32%2F235-union_mount_fixes.patch;fp=target%2Flinux%2Fgeneric-2.6%2Fpatches-2.6.32%2F235-union_mount_fixes.patch;h=0000000000000000000000000000000000000000;hb=210b6ad13ce21782fa4a6664250f376a89e7a4cb;hp=ff1fba01bfc2b4bbef7d3bf893ad3e9941955ab4;hpb=e9b1e2efdfff9d33e907f9a07ff39ac186abd48b;p=openwrt.git

diff --git a/target/linux/generic-2.6/patches-2.6.32/235-union_mount_fixes.patch b/target/linux/generic-2.6/patches-2.6.32/235-union_mount_fixes.patch
deleted file mode 100644
index ff1fba01bf..0000000000
--- a/target/linux/generic-2.6/patches-2.6.32/235-union_mount_fixes.patch
+++ /dev/null
@@ -1,117 +0,0 @@
---- a/fs/namespace.c
-+++ b/fs/namespace.c
-@@ -1656,8 +1656,10 @@ static int do_move_mount(struct path *pa
- 
- 	/* moving to or from a union mount is not supported */
- 	err = -EINVAL;
-+#if 0
- 	if (IS_MNT_UNION(path->mnt))
- 		goto exit;
-+#endif
- 	if (IS_MNT_UNION(old_path.mnt))
- 		goto exit;
- 
---- a/fs/union.c
-+++ b/fs/union.c
-@@ -260,8 +260,6 @@ int append_to_union(struct vfsmount *mnt
- 	spin_lock(&union_lock);
- 	um = union_lookup(dentry, mnt);
- 	if (um) {
--		BUG_ON((um->u_next.dentry != dest_dentry) ||
--		       (um->u_next.mnt != dest_mnt));
- 		spin_unlock(&union_lock);
- 		union_put(this);
- 		return 0;
-@@ -274,6 +272,23 @@ int append_to_union(struct vfsmount *mnt
- 	return 0;
- }
- 
-+int follow_union_mountpoint(struct path *path)
-+{
-+	struct path new_path = *path;
-+
-+	path_get(&new_path);
-+	while (follow_union_down(&new_path)) {
-+		if (new_path.dentry != new_path.mnt->mnt_root)
-+			continue;
-+
-+		path_put(path);
-+		*path = new_path;
-+		return 1;
-+	}
-+	path_put(&new_path);
-+	return 0;
-+}
-+
- /*
-  * follow_union_down - follow the union stack one layer down
-  *
---- a/include/linux/union.h
-+++ b/include/linux/union.h
-@@ -47,6 +47,7 @@ extern int append_to_union(struct vfsmou
- 			   struct vfsmount *, struct dentry *);
- extern int follow_union_down(struct path *);
- extern int follow_union_mount(struct path *);
-+extern int follow_union_mountpoint(struct path *path);
- extern void __d_drop_unions(struct dentry *);
- extern void shrink_d_unions(struct dentry *);
- extern void __shrink_d_unions(struct dentry *, struct list_head *);
-@@ -68,6 +69,7 @@ extern int union_permission(struct path 
- #define append_to_union(x1, y1, x2, y2)	({ BUG(); (0); })
- #define follow_union_down(x)		({ (0); })
- #define follow_union_mount(x)	({ (0); })
-+#define follow_union_mountpoint(x)	({ (0); })
- #define __d_drop_unions(x)		do { } while (0)
- #define shrink_d_unions(x)		do { } while (0)
- #define __shrink_d_unions(x,y)		do { } while (0)
---- a/fs/namei.c
-+++ b/fs/namei.c
-@@ -626,6 +626,9 @@ static int cache_lookup_union(struct nam
- 		    !S_ISDIR(path->dentry->d_inode->i_mode))
- 			goto out;
- 
-+		if (follow_union_mountpoint(path))
-+			goto out;
-+
- 		/* Build the union stack for this part */
- 		res = __cache_lookup_build_union(nd, name, path);
- 		if (res) {
-@@ -892,6 +895,9 @@ static int real_lookup_union(struct name
- 	    !S_ISDIR(path->dentry->d_inode->i_mode))
- 		goto out;
- 
-+	if (follow_union_mountpoint(path))
-+		goto out;
-+
- 	/* Build the union stack for this part */
- 	res = __real_lookup_build_union(nd, name, path);
- 	if (res) {
-@@ -1813,6 +1819,9 @@ int hash_lookup_union(struct nameidata *
- 	    !S_ISDIR(path->dentry->d_inode->i_mode))
- 		goto out;
- 
-+	if (follow_union_mountpoint(path))
-+		goto out;
-+
- 	/* Build the union stack for this part */
- 	res = __hash_lookup_build_union(nd, name, path);
- 	if (res) {
---- a/fs/readdir.c
-+++ b/fs/readdir.c
-@@ -17,6 +17,7 @@
- #include <linux/syscalls.h>
- #include <linux/unistd.h>
- #include <linux/union.h>
-+#include <linux/mount.h>
- 
- #include <asm/uaccess.h>
- 
-@@ -45,7 +46,7 @@ int vfs_readdir(struct file *file, filld
- 		 * below this one in the union stack.
- 		 */
- 		if (is_unionized(file->f_path.dentry, file->f_path.mnt) &&
--		    !IS_OPAQUE(inode)) {
-+		    !IS_OPAQUE(inode) && IS_MNT_UNION(file->f_path.mnt)) {
- 			res = union_copyup_dir(&file->f_path);
- 			if (res)
- 				goto out_unlock;