diff options
author | Christoph Hellwig <hch@lst.de> | 2005-11-08 21:35:04 -0800 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-09 07:55:59 -0800 |
commit | 8c744fb83da0771afa04695028e3550b798dad90 (patch) | |
tree | 670896a1c2594965099853a6c992907abb3a886f /fs/namei.c | |
parent | e4543eddfd3bf3e0d625841377fa695a519edfd4 (diff) | |
download | linux-3.10-8c744fb83da0771afa04695028e3550b798dad90.tar.gz linux-3.10-8c744fb83da0771afa04695028e3550b798dad90.tar.bz2 linux-3.10-8c744fb83da0771afa04695028e3550b798dad90.zip |
[PATCH] add a file_permission helper
A few more callers of permission() just want to check for a different access
pattern on an already open file. This patch adds a wrapper for permission()
that takes a file in preparation of per-mount read-only support and to clean
up the callers a little. The helper is not intended for new code, everything
without the interface set in stone should use vfs_permission()
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/namei.c')
-rw-r--r-- | fs/namei.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/namei.c b/fs/namei.c index 25e4ab4ce8b..b69f6ebadb9 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -271,6 +271,23 @@ int vfs_permission(struct nameidata *nd, int mask) return permission(nd->dentry->d_inode, mask, nd); } +/** + * file_permission - check for additional access rights to a given file + * @file: file to check access rights for + * @mask: right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC) + * + * Used to check for read/write/execute permissions on an already opened + * file. + * + * Note: + * Do not use this function in new code. All access checks should + * be done using vfs_permission(). + */ +int file_permission(struct file *file, int mask) +{ + return permission(file->f_dentry->d_inode, mask, NULL); +} + /* * get_write_access() gets write permission for a file. * put_write_access() releases this write permission. @@ -2551,6 +2568,7 @@ EXPORT_SYMBOL(path_release); EXPORT_SYMBOL(path_walk); EXPORT_SYMBOL(permission); EXPORT_SYMBOL(vfs_permission); +EXPORT_SYMBOL(file_permission); EXPORT_SYMBOL(unlock_rename); EXPORT_SYMBOL(vfs_create); EXPORT_SYMBOL(vfs_follow_link); |