[PATCH 2/3] vfs: retire user_path_at_empty and drop empty arg from getname_flags
From: Mateusz Guzik
Date: Tue Jun 04 2024 - 11:54:16 EST
No users after do_readlinkat started doing the job on its own.
Signed-off-by: Mateusz Guzik <mjguzik@xxxxxxxxx>
---
fs/fsopen.c | 2 +-
fs/namei.c | 16 +++++++---------
fs/stat.c | 6 +++---
include/linux/fs.h | 2 +-
include/linux/namei.h | 8 +-------
io_uring/statx.c | 3 +--
io_uring/xattr.c | 4 ++--
7 files changed, 16 insertions(+), 25 deletions(-)
diff --git a/fs/fsopen.c b/fs/fsopen.c
index 6593ae518115..e7d0080c4f8b 100644
--- a/fs/fsopen.c
+++ b/fs/fsopen.c
@@ -451,7 +451,7 @@ 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;
diff --git a/fs/namei.c b/fs/namei.c
index 37fb0a8aa09a..950ad6bdd9fe 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -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)
diff --git a/fs/stat.c b/fs/stat.c
index 7f7861544500..16aa1f5ceec4 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -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);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0283cf366c2a..dfe22a622df6 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2685,7 +2685,7 @@ 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 *);
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 967aa9ea9f96..8ec8fed3bce8 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -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,
diff --git a/io_uring/statx.c b/io_uring/statx.c
index abb874209caa..f7f9b202eec0 100644
--- a/io_uring/statx.c
+++ b/io_uring/statx.c
@@ -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);
diff --git a/io_uring/xattr.c b/io_uring/xattr.c
index 44905b82eea8..6cf41c3bc369 100644
--- a/io_uring/xattr.c
+++ b/io_uring/xattr.c
@@ -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;
--
2.39.2