diff options
Diffstat (limited to 'fs/stat.c')
| -rw-r--r-- | fs/stat.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/stat.c b/fs/stat.c index 136711ae72fb..6822ac77aec2 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -311,6 +311,23 @@ int vfs_fstatat(int dfd, const char __user *filename, int statx_flags = flags | AT_NO_AUTOMOUNT; struct filename *name; + /* + * Work around glibc turning fstat() into fstatat(AT_EMPTY_PATH) + * + * If AT_EMPTY_PATH is set, we expect the common case to be that + * empty path, and avoid doing all the extra pathname work. + */ + if (dfd >= 0 && flags == AT_EMPTY_PATH) { + char c; + + ret = get_user(c, filename); + if (unlikely(ret)) + return ret; + + if (likely(!c)) + return vfs_fstat(dfd, stat); + } + name = getname_flags(filename, getname_statx_lookup_flags(statx_flags), NULL); ret = vfs_statx(dfd, name, statx_flags, stat, STATX_BASIC_STATS); putname(name); |