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| author | Christian Brauner <christian.brauner@ubuntu.com> | 2021-01-21 14:19:22 +0100 |
|---|---|---|
| committer | Christian Brauner <christian.brauner@ubuntu.com> | 2021-01-24 14:27:16 +0100 |
| commit | 02f92b3868a1b34ab98464e76b0e4e060474ba10 (patch) | |
| tree | 355710b868f8a26f8fd5ba413938f92f8a24b68a /fs/notify | |
| parent | e6c9a71451560edba343cbcbd500bea0a188f0d1 (diff) | |
| download | linux-02f92b3868a1b34ab98464e76b0e4e060474ba10.tar.gz linux-02f92b3868a1b34ab98464e76b0e4e060474ba10.tar.xz | |
fs: add file and path permissions helpers
Add two simple helpers to check permissions on a file and path
respectively and convert over some callers. It simplifies quite a few
codepaths and also reduces the churn in later patches quite a bit.
Christoph also correctly points out that this makes codepaths (e.g.
ioctls) way easier to follow that would otherwise have to do more
complex argument passing than necessary.
Link: https://lore.kernel.org/r/20210121131959.646623-4-christian.brauner@ubuntu.com
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'fs/notify')
| -rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 2 | ||||
| -rw-r--r-- | fs/notify/inotify/inotify_user.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index dcab112e1f00..64cfc1a3015d 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -702,7 +702,7 @@ static int fanotify_find_path(int dfd, const char __user *filename, } /* you can only watch an inode if you have read permissions on it */ - ret = inode_permission(path->dentry->d_inode, MAY_READ); + ret = path_permission(path, MAY_READ); if (ret) { path_put(path); goto out; diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index 59c177011a0f..e1155d32ef6f 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -352,7 +352,7 @@ static int inotify_find_inode(const char __user *dirname, struct path *path, if (error) return error; /* you can only watch an inode if you have read permissions on it */ - error = inode_permission(path->dentry->d_inode, MAY_READ); + error = path_permission(path, MAY_READ); if (error) { path_put(path); return error; |