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fs: implement vfs_stat and vfs_lstat in terms of vfs_fstatat 

Go through vfs_fstatat instead of duplicating the *stat to statx mapping
three times.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2020-09-26 09:03:58 +02:00 committed by Al Viro
parent da9aa5d96b
commit 0b2c6693b4
1 changed files with 8 additions and 10 deletions
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18
include/linux/fs.h
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@ -3165,22 +3165,20 @@ extern int iterate_dir(struct file *, struct dir_context *);
extern int vfs_statx(int, const char __user *, int, struct kstat *, u32);
int vfs_fstat(int fd, struct kstat *stat);
static inline int vfs_stat(const char __user *filename, struct kstat *stat)
{
return vfs_statx(AT_FDCWD, filename, AT_NO_AUTOMOUNT,
stat, STATX_BASIC_STATS);
}
static inline int vfs_lstat(const char __user *name, struct kstat *stat)
{
return vfs_statx(AT_FDCWD, name, AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT,
stat, STATX_BASIC_STATS);
}
static inline int vfs_fstatat(int dfd, const char __user *filename,
struct kstat *stat, int flags)
{
return vfs_statx(dfd, filename, flags | AT_NO_AUTOMOUNT,
stat, STATX_BASIC_STATS);
}
static inline int vfs_stat(const char __user *filename, struct kstat *stat)
{
return vfs_fstatat(AT_FDCWD, filename, stat, 0);
}
static inline int vfs_lstat(const char __user *name, struct kstat *stat)
{
return vfs_fstatat(AT_FDCWD, name, stat, AT_SYMLINK_NOFOLLOW);
}
extern const char *vfs_get_link(struct dentry *, struct delayed_call *);
extern int vfs_readlink(struct dentry *, char __user *, int);