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From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@zeniv.linux.org.uk>,
	Linus Torvalds <torvalds@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org
Subject: [PATCH 09/21] init: add an init_unlink helper
Date: Sun, 26 Jul 2020 09:13:44 +0200	[thread overview]
Message-ID: <20200726071356.287160-10-hch@lst.de> (raw)
In-Reply-To: <20200726071356.287160-1-hch@lst.de>

Add a simple helper to unlink with a kernel space file name and switch
the early init code over to it.  Remove the now unused ksys_unlink.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/for_init.c                 | 5 +++++
 include/linux/init_syscalls.h | 1 +
 include/linux/syscalls.h      | 7 -------
 init/do_mounts.h              | 2 +-
 init/do_mounts_initrd.c       | 4 ++--
 init/do_mounts_rd.c           | 2 +-
 init/initramfs.c              | 3 ++-
 7 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/fs/for_init.c b/fs/for_init.c
index 7a039b6d107c92..32472206d64136 100644
--- a/fs/for_init.c
+++ b/fs/for_init.c
@@ -33,3 +33,8 @@ int __init init_umount(const char *name, int flags)
 		return ret;
 	return path_umount(&path, flags);
 }
+
+int __init init_unlink(const char *pathname)
+{
+	return do_unlinkat(AT_FDCWD, getname_kernel(pathname));
+}
diff --git a/include/linux/init_syscalls.h b/include/linux/init_syscalls.h
index a5a2e7f1991691..00d597249549ee 100644
--- a/include/linux/init_syscalls.h
+++ b/include/linux/init_syscalls.h
@@ -3,3 +3,4 @@
 int __init init_mount(const char *dev_name, const char *dir_name,
 		const char *type_page, unsigned long flags, void *data_page);
 int __init init_umount(const char *name, int flags);
+int __init init_unlink(const char *pathname);
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 1a4f5d8ee7044b..26f9738e5ab861 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1273,13 +1273,6 @@ int compat_ksys_ipc(u32 call, int first, int second,
  * The following kernel syscall equivalents are just wrappers to fs-internal
  * functions. Therefore, provide stubs to be inlined at the callsites.
  */
-extern long do_unlinkat(int dfd, struct filename *name);
-
-static inline long ksys_unlink(const char __user *pathname)
-{
-	return do_unlinkat(AT_FDCWD, getname(pathname));
-}
-
 long do_rmdir(int dfd, struct filename *name);
 
 static inline long ksys_rmdir(const char __user *pathname)
diff --git a/init/do_mounts.h b/init/do_mounts.h
index 20e7fec8cb499e..104d8431725aeb 100644
--- a/init/do_mounts.h
+++ b/init/do_mounts.h
@@ -16,7 +16,7 @@ extern int root_mountflags;
 
 static inline __init int create_dev(char *name, dev_t dev)
 {
-	ksys_unlink(name);
+	init_unlink(name);
 	return ksys_mknod(name, S_IFBLK|0600, new_encode_dev(dev));
 }
 
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 6b020a06990251..8b44dd017842a8 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -137,11 +137,11 @@ bool __init initrd_load(void)
 		 * mounted in the normal path.
 		 */
 		if (rd_load_image("/initrd.image") && ROOT_DEV != Root_RAM0) {
-			ksys_unlink("/initrd.image");
+			init_unlink("/initrd.image");
 			handle_initrd();
 			return true;
 		}
 	}
-	ksys_unlink("/initrd.image");
+	init_unlink("/initrd.image");
 	return false;
 }
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index 7b64390c075043..b062f8b028ce7c 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -271,7 +271,7 @@ int __init rd_load_image(char *from)
 	fput(out_file);
 out:
 	kfree(buf);
-	ksys_unlink("/dev/ram");
+	init_unlink("/dev/ram");
 	return res;
 }
 
diff --git a/init/initramfs.c b/init/initramfs.c
index 3823d15e5d2619..574ab3755203da 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -12,6 +12,7 @@
 #include <linux/file.h>
 #include <linux/memblock.h>
 #include <linux/namei.h>
+#include <linux/init_syscalls.h>
 
 static ssize_t __init xwrite(struct file *file, const char *p, size_t count)
 {
@@ -300,7 +301,7 @@ static void __init clean_path(char *path, umode_t fmode)
 		if (S_ISDIR(st.mode))
 			ksys_rmdir(path);
 		else
-			ksys_unlink(path);
+			init_unlink(path);
 	}
 }
 
-- 
2.27.0


  parent reply	other threads:[~2020-07-26  7:15 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-26  7:13 add file system helpers that take kernel pointers for the init code v3 Christoph Hellwig
2020-07-26  7:13 ` [PATCH 01/21] fs: refactor do_mount Christoph Hellwig
2020-07-26  7:13 ` [PATCH 02/21] fs: refactor ksys_umount Christoph Hellwig
2020-07-26  7:13 ` [PATCH 03/21] fs: push the getname from do_rmdir into the callers Christoph Hellwig
2020-07-26  7:13 ` [PATCH 04/21] devtmpfs: refactor devtmpfsd() Christoph Hellwig
2020-07-26  7:43   ` Greg Kroah-Hartman
2020-07-26  8:21     ` Christoph Hellwig
2020-07-26  7:13 ` [PATCH 05/21] init: initialize ramdisk_execute_command at compile time Christoph Hellwig
2020-07-26  7:13 ` [PATCH 06/21] init: mark create_dev as __init Christoph Hellwig
2020-07-26  7:13 ` [PATCH 07/21] init: add an init_mount helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 08/21] init: add an init_umount helper Christoph Hellwig
2020-07-26  7:13 ` Christoph Hellwig [this message]
2020-07-26  7:13 ` [PATCH 10/21] init: add an init_rmdir helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 11/21] init: add an init_chdir helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 12/21] init: add an init_chroot helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 13/21] init: add an init_chown helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 14/21] init: add an init_chmod helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 15/21] init: add an init_eaccess helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 16/21] init: add an init_link helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 17/21] init: add an init_symlink helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 18/21] init: add an init_mkdir helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 19/21] init: add an init_mknod helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 20/21] init: add an init_stat helper Christoph Hellwig
2020-07-26  7:13 ` [PATCH 21/21] init: add an init_utimes helper Christoph Hellwig
2020-07-26 15:49 ` add file system helpers that take kernel pointers for the init code v3 Linus Torvalds
2020-07-26 15:52   ` Christoph Hellwig
2020-07-26 16:21     ` Al Viro
2020-07-26 16:24       ` Christoph Hellwig
2020-07-26 16:26         ` Christoph Hellwig
2020-07-26 16:33           ` Al Viro

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