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| author |   Richard Weinberger <richard@nod.at> | 2016-06-12 23:37:53 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2016-06-14 10:51:42 +0200 |
| commit | ad022c87187b50f50937bd9bcd1ef312442a89af (patch) | |
| tree | 738dda7e226f86ba2b875296828a85421834ea14 /drivers/mtd | |
| parent | Merge branch 'for-4.7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu (diff) | |
| download | linux-dev-ad022c87187b50f50937bd9bcd1ef312442a89af.tar.xz linux-dev-ad022c87187b50f50937bd9bcd1ef312442a89af.zip | |
Revert "mtd: switch ubi_open_volume_path() to vfs_stat()"
This reverts commit 322ea0bbf3003df17b6253f76e572c37d79a6810.
vfs_stat() can only be used on user supplied buffers.
UBI's kapi.c is the API to the kernel and therefore vfs_stat()
is inappropriate.
This solves the problem that mounting any UBIFS will immediately
fail with -EINVAL.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/kapi.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c index 348dbbcbedc8..cc6fa0115c9a 100644 --- a/drivers/mtd/ubi/kapi.c +++ b/drivers/mtd/ubi/kapi.c @@ -301,24 +301,27 @@ EXPORT_SYMBOL_GPL(ubi_open_volume_nm); */ struct ubi_volume_desc *ubi_open_volume_path(const char *pathname, int mode) { - int error, ubi_num, vol_id; - struct kstat stat; + int error, ubi_num, vol_id, mod; + struct inode *inode; + struct path path; dbg_gen("open volume %s, mode %d", pathname, mode); if (!pathname || !*pathname) return ERR_PTR(-EINVAL); - error = vfs_stat(pathname, &stat); + error = kern_path(pathname, LOOKUP_FOLLOW, &path); if (error) return ERR_PTR(error); - if (!S_ISCHR(stat.mode)) - return ERR_PTR(-EINVAL); - - ubi_num = ubi_major2num(MAJOR(stat.rdev)); - vol_id = MINOR(stat.rdev) - 1; + inode = d_backing_inode(path.dentry); + mod = inode->i_mode; + ubi_num = ubi_major2num(imajor(inode)); + vol_id = iminor(inode) - 1; + path_put(&path); + if (!S_ISCHR(mod)) + return ERR_PTR(-EINVAL); if (vol_id >= 0 && ubi_num >= 0) return ubi_open_volume(ubi_num, vol_id, mode); return ERR_PTR(-ENODEV); |