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vfs: retire user_path_at_empty and drop empty arg from getname_flags

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No users after do_readlinkat started doing the job on its own.

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/r/20240604155257.109500-3-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Mateusz Guzik 2024-06-04 17:52:56 +02:00 committed by Christian Brauner
parent 969ce92da3
commit dff60734fc
7 changed files with 16 additions and 25 deletions
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2
fs/fsopen.c
View File

@ -448,7 +448,7 @@ SYSCALL_DEFINE5(fsconfig,
fallthrough;
case FSCONFIG_SET_PATH:
param.type = fs_value_is_filename;
param.name = getname_flags(_value, lookup_flags, NULL);
param.name = getname_flags(_value, lookup_flags);
if (IS_ERR(param.name)) {
ret = PTR_ERR(param.name);
goto out_key;

16
fs/namei.c
View File

@ -126,7 +126,7 @@
#define EMBEDDED_NAME_MAX (PATH_MAX - offsetof(struct filename, iname))
struct filename *
getname_flags(const char __user *filename, int flags, int *empty)
getname_flags(const char __user *filename, int flags)
{
struct filename *result;
char *kname;
@ -190,8 +190,6 @@ getname_flags(const char __user *filename, int flags, int *empty)
atomic_set(&result->refcnt, 1);
/* The empty path is special. */
if (unlikely(!len)) {
if (empty)
*empty = 1;
if (!(flags & LOOKUP_EMPTY)) {
putname(result);
return ERR_PTR(-ENOENT);
@ -209,13 +207,13 @@ getname_uflags(const char __user *filename, int uflags)
{
int flags = (uflags & AT_EMPTY_PATH) ? LOOKUP_EMPTY : 0;
return getname_flags(filename, flags, NULL);
return getname_flags(filename, flags);
}
struct filename *
getname(const char __user * filename)
{
return getname_flags(filename, 0, NULL);
return getname_flags(filename, 0);
}
struct filename *
@ -2922,16 +2920,16 @@ int path_pts(struct path *path)
}
#endif
int user_path_at_empty(int dfd, const char __user *name, unsigned flags,
struct path *path, int *empty)
int user_path_at(int dfd, const char __user *name, unsigned flags,
struct path *path)
{
struct filename *filename = getname_flags(name, flags, empty);
struct filename *filename = getname_flags(name, flags);
int ret = filename_lookup(dfd, filename, flags, path, NULL);
putname(filename);
return ret;
}
EXPORT_SYMBOL(user_path_at_empty);
EXPORT_SYMBOL(user_path_at);
int __check_sticky(struct mnt_idmap *idmap, struct inode *dir,
struct inode *inode)

6
fs/stat.c
View File

@ -300,7 +300,7 @@ int vfs_fstatat(int dfd, const char __user *filename,
return vfs_fstat(dfd, stat);
}
name = getname_flags(filename, getname_statx_lookup_flags(statx_flags), NULL);
name = getname_flags(filename, getname_statx_lookup_flags(statx_flags));
ret = vfs_statx(dfd, name, statx_flags, stat, STATX_BASIC_STATS);
putname(name);
@ -496,7 +496,7 @@ static int do_readlinkat(int dfd, const char __user *pathname,
return -EINVAL;
retry:
name = getname_flags(pathname, lookup_flags, NULL);
name = getname_flags(pathname, lookup_flags);
error = filename_lookup(dfd, name, lookup_flags, &path, NULL);
if (unlikely(error)) {
putname(name);
@ -710,7 +710,7 @@ SYSCALL_DEFINE5(statx,
int ret;
struct filename *name;
name = getname_flags(filename, getname_statx_lookup_flags(flags), NULL);
name = getname_flags(filename, getname_statx_lookup_flags(flags));
ret = do_statx(dfd, name, flags, mask, buffer);
putname(name);

2
include/linux/fs.h
View File

@ -2701,7 +2701,7 @@ static inline struct file *file_clone_open(struct file *file)
}
extern int filp_close(struct file *, fl_owner_t id);
extern struct filename *getname_flags(const char __user *, int, int *);
extern struct filename *getname_flags(const char __user *, int);
extern struct filename *getname_uflags(const char __user *, int);
extern struct filename *getname(const char __user *);
extern struct filename *getname_kernel(const char *);

8
include/linux/namei.h
View File

@ -50,13 +50,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT};
extern int path_pts(struct path *path);
extern int user_path_at_empty(int, const char __user *, unsigned, struct path *, int *empty);
static inline int user_path_at(int dfd, const char __user *name, unsigned flags,
struct path *path)
{
return user_path_at_empty(dfd, name, flags, path, NULL);
}
extern int user_path_at(int, const char __user *, unsigned, struct path *);
struct dentry *lookup_one_qstr_excl(const struct qstr *name,
struct dentry *base,

3
io_uring/statx.c
View File

@ -37,8 +37,7 @@ int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
sx->flags = READ_ONCE(sqe->statx_flags);
sx->filename = getname_flags(path,
getname_statx_lookup_flags(sx->flags),
NULL);
getname_statx_lookup_flags(sx->flags));
if (IS_ERR(sx->filename)) {
int ret = PTR_ERR(sx->filename);

4
io_uring/xattr.c
View File

@ -96,7 +96,7 @@ int io_getxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
path = u64_to_user_ptr(READ_ONCE(sqe->addr3));
ix->filename = getname_flags(path, LOOKUP_FOLLOW, NULL);
ix->filename = getname_flags(path, LOOKUP_FOLLOW);
if (IS_ERR(ix->filename)) {
ret = PTR_ERR(ix->filename);
ix->filename = NULL;
@ -189,7 +189,7 @@ int io_setxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
path = u64_to_user_ptr(READ_ONCE(sqe->addr3));
ix->filename = getname_flags(path, LOOKUP_FOLLOW, NULL);
ix->filename = getname_flags(path, LOOKUP_FOLLOW);
if (IS_ERR(ix->filename)) {
ret = PTR_ERR(ix->filename);
ix->filename = NULL;