The patch titled
vfs: define new lookup flag for chdir
has been added to the -mm tree. Its filename is
vfs-define-new-lookup-flag-for-chdir.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: vfs: define new lookup flag for chdir
From: Miklos Szeredi <miklos@xxxxxxxxxx>
In the "operation does permission checking" model used by fuse, chdir
permission is not checked, since there's no chdir method.
For this case set a lookup flag, which will be passed to ->permission(), so
fuse can distinguish it from permission checks for other operations.
Signed-off-by: Miklos Szeredi <miklos@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/fuse/dir.c | 2 +-
fs/open.c | 3 ++-
include/linux/namei.h | 1 +
3 files changed, 4 insertions(+), 2 deletions(-)
diff -puN fs/fuse/dir.c~vfs-define-new-lookup-flag-for-chdir fs/fuse/dir.c
--- a/fs/fuse/dir.c~vfs-define-new-lookup-flag-for-chdir
+++ a/fs/fuse/dir.c
@@ -776,7 +776,7 @@ static int fuse_permission(struct inode
if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO))
return -EACCES;
- if (nd && (nd->flags & LOOKUP_ACCESS))
+ if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR)))
return fuse_access(inode, mask);
return 0;
}
diff -puN fs/open.c~vfs-define-new-lookup-flag-for-chdir fs/open.c
--- a/fs/open.c~vfs-define-new-lookup-flag-for-chdir
+++ a/fs/open.c
@@ -546,7 +546,8 @@ asmlinkage long sys_chdir(const char __u
struct nameidata nd;
int error;
- error = __user_walk(filename, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &nd);
+ error = __user_walk(filename,
+ LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
if (error)
goto out;
diff -puN include/linux/namei.h~vfs-define-new-lookup-flag-for-chdir include/linux/namei.h
--- a/include/linux/namei.h~vfs-define-new-lookup-flag-for-chdir
+++ a/include/linux/namei.h
@@ -54,6 +54,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LA
#define LOOKUP_OPEN (0x0100)
#define LOOKUP_CREATE (0x0200)
#define LOOKUP_ACCESS (0x0400)
+#define LOOKUP_CHDIR (0x0800)
extern int FASTCALL(__user_walk(const char __user *, unsigned, struct nameidata *));
extern int FASTCALL(__user_walk_fd(int dfd, const char __user *, unsigned, struct nameidata *));
_
Patches currently in -mm which might be from miklos@xxxxxxxxxx are
add-address_space_operationsbatch_write.patch
add-address_space_operationsbatch_write-fix.patch
pass-io-size-to-batch_write-address-space-operation.patch
fuse-add-lock-annotations-to-request_end-and-fuse_read_interrupt.patch
fuse-fix-zero-timeout.patch
fuse-use-jiffies_64.patch
fuse-fix-typo.patch
fuse-use-dentry-in-statfs.patch
vfs-define-new-lookup-flag-for-chdir.patch
-
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