From 88fdc2761797ee7a537f92a84a4d4ac2e04436a4 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 6 Jan 2026 23:30:02 -0500 Subject: [PATCH] non-consuming variant of do_mknodat() similar to previous commit; replacement is filename_mknodat() Signed-off-by: Al Viro --- Documentation/filesystems/porting.rst | 2 +- fs/init.c | 3 ++- fs/internal.h | 2 +- fs/namei.c | 17 ++++++++--------- 4 files changed, 12 insertions(+), 12 deletions(-) diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index d75b549ed528d..d9a94a0718524 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -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_mkdirat(). +do_symlinkat(), do_mkdirat(), do_mknodat(). diff --git a/fs/init.c b/fs/init.c index 9a550ba4802f6..543444c1d79e1 100644 --- a/fs/init.c +++ b/fs/init.c @@ -140,7 +140,8 @@ int __init init_stat(const char *filename, struct kstat *stat, int flags) int __init init_mknod(const char *filename, umode_t mode, unsigned int dev) { - return do_mknodat(AT_FDCWD, getname_kernel(filename), mode, dev); + CLASS(filename_kernel, name)(filename); + return filename_mknodat(AT_FDCWD, name, mode, dev); } int __init init_link(const char *oldname, const char *newname) diff --git a/fs/internal.h b/fs/internal.h index 03638008d84a8..02b5dec13ff36 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -60,7 +60,7 @@ 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 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_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, struct filename *new, int flags); diff --git a/fs/namei.c b/fs/namei.c index 21a2dbd8b9e66..ca524c5b18f41 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -5072,8 +5072,8 @@ static int may_mknod(umode_t mode) } } -int do_mknodat(int dfd, struct filename *name, umode_t mode, - unsigned int dev) +int filename_mknodat(int dfd, struct filename *name, umode_t mode, + unsigned int dev) { struct delegated_inode di = { }; struct mnt_idmap *idmap; @@ -5084,12 +5084,11 @@ int do_mknodat(int dfd, struct filename *name, umode_t mode, error = may_mknod(mode); if (error) - goto out1; + return error; retry: dentry = filename_create(dfd, name, &path, lookup_flags); - error = PTR_ERR(dentry); if (IS_ERR(dentry)) - goto out1; + return PTR_ERR(dentry); error = security_path_mknod(&path, dentry, mode_strip_umask(path.dentry->d_inode, mode), dev); @@ -5123,20 +5122,20 @@ out2: lookup_flags |= LOOKUP_REVAL; goto retry; } -out1: - putname(name); return error; } SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, unsigned int, dev) { - return do_mknodat(dfd, getname(filename), mode, dev); + CLASS(filename, name)(filename); + return filename_mknodat(dfd, name, mode, dev); } SYSCALL_DEFINE3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev) { - return do_mknodat(AT_FDCWD, getname(filename), mode, dev); + CLASS(filename, name)(filename); + return filename_mknodat(AT_FDCWD, name, mode, dev); } /** -- 2.47.3