diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2023-11-16 06:41:27 +0300 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2023-11-16 06:41:27 +0300 |
commit | 74d016ecc1a7974664e98d1afbf649cd4e0e0423 (patch) | |
tree | f6a0d772c752ce1030fb28c6a63f5b89d5440a73 /fs | |
parent | b85ea95d086471afb4ad062012a4d73cd328fa86 (diff) | |
download | linux-74d016ecc1a7974664e98d1afbf649cd4e0e0423.tar.xz |
new helper: user_path_locked_at()
Equivalent of kern_path_locked() taking dfd/userland name.
User introduced in the next commit.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/namei.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/namei.c b/fs/namei.c index 71c13b2990b4..3ffbe268d52c 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2573,13 +2573,13 @@ static int filename_parentat(int dfd, struct filename *name, } /* does lookup, returns the object with parent locked */ -static struct dentry *__kern_path_locked(struct filename *name, struct path *path) +static struct dentry *__kern_path_locked(int dfd, struct filename *name, struct path *path) { struct dentry *d; struct qstr last; int type, error; - error = filename_parentat(AT_FDCWD, name, 0, path, &last, &type); + error = filename_parentat(dfd, name, 0, path, &last, &type); if (error) return ERR_PTR(error); if (unlikely(type != LAST_NORM)) { @@ -2598,12 +2598,22 @@ static struct dentry *__kern_path_locked(struct filename *name, struct path *pat struct dentry *kern_path_locked(const char *name, struct path *path) { struct filename *filename = getname_kernel(name); - struct dentry *res = __kern_path_locked(filename, path); + struct dentry *res = __kern_path_locked(AT_FDCWD, filename, path); putname(filename); return res; } +struct dentry *user_path_locked_at(int dfd, const char __user *name, struct path *path) +{ + struct filename *filename = getname(name); + struct dentry *res = __kern_path_locked(dfd, filename, path); + + putname(filename); + return res; +} +EXPORT_SYMBOL(user_path_locked_at); + int kern_path(const char *name, unsigned int flags, struct path *path) { struct filename *filename = getname_kernel(name); |