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non-consuming variant of do_mkdirat()

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similar to previous commit; replacement is filename_mkdirat()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2026-01-06 23:28:57 -05:00
parent da72b76aae
commit dc912db15a
5 changed files with 12 additions and 11 deletions
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2
Documentation/filesystems/porting.rst
View file

@ -1343,4 +1343,4 @@ fs/namei.c primitives that consume filesystem references (do_renameat2(),
do_linkat(), do_symlinkat(), do_mkdirat(), do_mknodat(), do_unlinkat()
and do_rmdir()) are getting replaced with non-consuming analogues
(filename_renameat2(), etc.) Replaced so far: do_renameat2(), do_linkat(),
do_symlinkat().
do_symlinkat(), do_mkdirat().

3
fs/init.c
View file

@ -164,7 +164,8 @@ int __init init_unlink(const char *pathname)
int __init init_mkdir(const char *pathname, umode_t mode)
{
return do_mkdirat(AT_FDCWD, getname_kernel(pathname), mode);
CLASS(filename_kernel, name)(pathname);
return filename_mkdirat(AT_FDCWD, name, mode);
}
int __init init_rmdir(const char *pathname)

2
fs/internal.h
View file

@ -59,7 +59,7 @@ int do_unlinkat(int dfd, struct filename *name);
int may_linkat(struct mnt_idmap *idmap, const struct path *link);
int filename_renameat2(int olddfd, struct filename *oldname, int newdfd,
struct filename *newname, unsigned int flags);
int do_mkdirat(int dfd, struct filename *name, umode_t mode);
int filename_mkdirat(int dfd, struct filename *name, umode_t mode);
int do_mknodat(int dfd, struct filename *name, umode_t mode, unsigned int dev);
int filename_symlinkat(struct filename *from, int newdfd, struct filename *to);
int filename_linkat(int olddfd, struct filename *old, int newdfd,

13
fs/namei.c
View file

@ -5207,7 +5207,7 @@ err:
}
EXPORT_SYMBOL(vfs_mkdir);
int do_mkdirat(int dfd, struct filename *name, umode_t mode)
int filename_mkdirat(int dfd, struct filename *name, umode_t mode)
{
struct dentry *dentry;
struct path path;
@ -5217,9 +5217,8 @@ int do_mkdirat(int dfd, struct filename *name, umode_t mode)
retry:
dentry = filename_create(dfd, name, &path, lookup_flags);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
goto out_putname;
return PTR_ERR(dentry);
error = security_path_mkdir(&path, dentry,
mode_strip_umask(path.dentry->d_inode, mode));
@ -5239,19 +5238,19 @@ retry:
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
out_putname:
putname(name);
return error;
}
SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode)
{
return do_mkdirat(dfd, getname(pathname), mode);
CLASS(filename, name)(pathname);
return filename_mkdirat(dfd, name, mode);
}
SYSCALL_DEFINE2(mkdir, const char __user *, pathname, umode_t, mode)
{
return do_mkdirat(AT_FDCWD, getname(pathname), mode);
CLASS(filename, name)(pathname);
return filename_mkdirat(AT_FDCWD, name, mode);
}
/**

3
io_uring/fs.c
View file

@ -182,11 +182,12 @@ int io_mkdirat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
int io_mkdirat(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_mkdir *mkd = io_kiocb_to_cmd(req, struct io_mkdir);
CLASS(filename_complete_delayed, name)(&mkd->filename);
int ret;
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
ret = do_mkdirat(mkd->dfd, complete_getname(&mkd->filename), mkd->mode);
ret = filename_mkdirat(mkd->dfd, name, mkd->mode);
req->flags &= ~REQ_F_NEED_CLEANUP;
io_req_set_res(req, ret, 0);