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| author | Chuck Lever <chuck.lever@oracle.com> | 2023-12-30 19:46:00 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2024-01-23 10:58:56 -0500 |
| commit | 42c3732fa8073717dd7d924472f1c0bc5b452fdc (patch) | |
| tree | d62658e93e5fe91a8e0e75b7c1ab90d384c90e54 /include/linux/fs.h | |
| parent | 9473c4450e9c83d890d435577a3776d925fa748c (diff) | |
| download | linux-42c3732fa8073717dd7d924472f1c0bc5b452fdc.tar.gz | |
fs: Create a generic is_dot_dotdot() utility
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>
Diffstat (limited to 'include/linux/fs.h')
| -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 98b7a7a8c42e36..baa64344a30823 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2846,6 +2846,17 @@ 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 */ |