From: Christoph Hellwig <hch@lst.de>
To: linux-kernel@vger.kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>, Song Liu <song@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH 01/23] fs: add a vfs_fchown helper
Date: Tue, 14 Jul 2020 21:04:05 +0200 [thread overview]
Message-ID: <20200714190427.4332-2-hch@lst.de> (raw)
In-Reply-To: <20200714190427.4332-1-hch@lst.de>
Add a helper for struct file based chown operations. To be used by
the initramfs code soon.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/open.c | 29 +++++++++++++++++------------
include/linux/fs.h | 2 ++
2 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/fs/open.c b/fs/open.c
index 6cd48a61cda3b9..103c66309bee67 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -740,23 +740,28 @@ SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group
AT_SYMLINK_NOFOLLOW);
}
+int vfs_fchown(struct file *file, uid_t user, gid_t group)
+{
+ int error;
+
+ error = mnt_want_write_file(file);
+ if (error)
+ return error;
+ audit_file(file);
+ error = chown_common(&file->f_path, user, group);
+ mnt_drop_write_file(file);
+ return error;
+}
+
int ksys_fchown(unsigned int fd, uid_t user, gid_t group)
{
struct fd f = fdget(fd);
int error = -EBADF;
- if (!f.file)
- goto out;
-
- error = mnt_want_write_file(f.file);
- if (error)
- goto out_fput;
- audit_file(f.file);
- error = chown_common(&f.file->f_path, user, group);
- mnt_drop_write_file(f.file);
-out_fput:
- fdput(f);
-out:
+ if (f.file) {
+ error = vfs_fchown(f.file, user, group);
+ fdput(f);
+ }
return error;
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index f5abba86107d86..0ddd64ca0b45c0 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1744,6 +1744,8 @@ int vfs_mkobj(struct dentry *, umode_t,
int (*f)(struct dentry *, umode_t, void *),
void *);
+int vfs_fchown(struct file *file, uid_t user, gid_t group);
+
extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
#ifdef CONFIG_COMPAT
--
2.27.0
next prev parent reply other threads:[~2020-07-14 19:11 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-14 19:04 decruft the early init / initrd / initramfs code v2 Christoph Hellwig
2020-07-14 19:04 ` Christoph Hellwig [this message]
2020-07-14 19:04 ` [PATCH 02/23] fs: add a vfs_fchmod helper Christoph Hellwig
2020-07-14 19:04 ` [PATCH 03/23] init: remove the bstat helper Christoph Hellwig
2020-07-15 23:14 ` NeilBrown
2020-07-14 19:04 ` [PATCH 04/23] md: move the early init autodetect code to drivers/md/ Christoph Hellwig
2020-07-14 19:04 ` [PATCH 05/23] md: replace the RAID_AUTORUN ioctl with a direct function call Christoph Hellwig
2020-07-15 23:33 ` NeilBrown
2020-07-14 19:04 ` [PATCH 06/23] md: remove the autoscan partition re-read Christoph Hellwig
2020-07-15 23:34 ` NeilBrown
2020-07-14 19:04 ` [PATCH 07/23] md: remove the kernel version of md_u.h Christoph Hellwig
2020-07-14 19:04 ` [PATCH 08/23] md: simplify md_setup_drive Christoph Hellwig
2020-07-15 23:37 ` NeilBrown
2020-07-14 19:04 ` [PATCH 09/23] md: rewrite md_setup_drive to avoid ioctls Christoph Hellwig
2020-07-15 23:50 ` NeilBrown
2020-07-16 13:38 ` Christoph Hellwig
2020-07-14 19:04 ` [PATCH 10/23] initrd: remove support for multiple floppies Christoph Hellwig
2020-07-14 19:04 ` [PATCH 11/23] initrd: remove the BLKFLSBUF call in handle_initrd Christoph Hellwig
2020-07-14 19:04 ` [PATCH 12/23] initrd: switch initrd loading to struct file based APIs Christoph Hellwig
2020-07-27 1:50 ` Al Viro
2020-07-14 19:04 ` [PATCH 13/23] initrd: mark init_linuxrc as __init Christoph Hellwig
2020-07-14 19:04 ` [PATCH 14/23] initrd: mark initrd support as deprecated Christoph Hellwig
2020-07-14 19:04 ` [PATCH 15/23] initramfs: remove the populate_initrd_image and clean_rootfs stubs Christoph Hellwig
2020-07-14 19:04 ` [PATCH 16/23] initramfs: simplify clean_rootfs Christoph Hellwig
[not found] ` <CGME20200717205549eucas1p13fca9a8496836faa71df515524743648@eucas1p1.samsung.com>
2020-07-17 20:55 ` Marek Szyprowski
2020-07-18 10:00 ` Christoph Hellwig
2020-07-23 9:22 ` Christoph Hellwig
2020-07-23 14:25 ` Lukasz Stelmach
2020-07-23 14:27 ` Christoph Hellwig
2020-07-27 2:41 ` Al Viro
2020-07-27 2:44 ` Matthew Wilcox
2020-07-14 19:04 ` [PATCH 17/23] initramfs: switch initramfs unpacking to struct file based APIs Christoph Hellwig
2020-07-14 19:31 ` Linus Torvalds
2020-07-15 6:27 ` Christoph Hellwig
2020-07-27 2:55 ` Al Viro
2020-07-14 19:04 ` [PATCH 18/23] init: open code setting up stdin/stdout/stderr Christoph Hellwig
2020-07-27 3:05 ` Al Viro
2020-07-27 5:46 ` Christoph Hellwig
2020-07-27 6:03 ` Al Viro
2020-07-27 6:48 ` Christoph Hellwig
2020-07-27 15:54 ` Al Viro
2020-07-27 15:58 ` Christoph Hellwig
2020-07-27 6:20 ` hpa
2020-07-27 6:24 ` Christoph Hellwig
2020-07-27 6:36 ` hpa
2020-07-27 6:49 ` Christoph Hellwig
2020-07-14 19:04 ` [PATCH 19/23] fs: remove ksys_getdents64 Christoph Hellwig
2020-07-14 19:04 ` [PATCH 20/23] fs: remove ksys_open Christoph Hellwig
2020-07-14 19:04 ` [PATCH 21/23] fs: remove ksys_dup Christoph Hellwig
2020-07-14 19:04 ` [PATCH 22/23] fs: remove ksys_fchmod Christoph Hellwig
2020-07-14 19:04 ` [PATCH 23/23] fs: remove ksys_ioctl Christoph Hellwig
2020-07-14 19:34 ` decruft the early init / initrd / initramfs code v2 Linus Torvalds
2020-07-15 6:51 ` Christoph Hellwig
2020-07-16 15:57 ` Guoqing Jiang
2020-07-16 16:00 ` Christoph Hellwig
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