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| author | Chuck Lever <chuck.lever@oracle.com> | 2023-12-31 03:46:00 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-04 17:29:48 +0300 |
| commit | ef83620438d7b08cd66269c2262fcc2007cd5454 (patch) | |
| tree | 501e7d803fb8cb32482ef07484476a53ae7a0d7c /include | |
| parent | ae619de5000b73562a1ef42ce03d10e7a6fff6a7 (diff) | |
| download | linux-ef83620438d7b08cd66269c2262fcc2007cd5454.tar.xz | |
fs: Create a generic is_dot_dotdot() utility
commit 42c3732fa8073717dd7d924472f1c0bc5b452fdc upstream.
De-duplicate the same functionality in several places by hoisting
the is_dot_dotdot() utility function into linux/fs.h.
Suggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 2a554e4045a9..6c3d86532e3f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2844,6 +2844,17 @@ extern bool path_is_under(const struct path *, const struct path *); extern char *file_path(struct file *, char *, int); +/** + * is_dot_dotdot - returns true only if @name is "." or ".." + * @name: file name to check + * @len: length of file name, in bytes + */ +static inline bool is_dot_dotdot(const char *name, size_t len) +{ + return len && unlikely(name[0] == '.') && + (len == 1 || (len == 2 && name[1] == '.')); +} + #include <linux/err.h> /* needed for stackable file system support */ |