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Message-ID: <20060910183440.GA5192@martell.zuzino.mipt.ru>
Date: Sun, 10 Sep 2006 22:34:40 +0400
From: Alexey Dobriyan <adobriyan@...il.com>
To: Andrew Morton <akpm@...l.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] Create fs/utimes.c
* fs/open.c is getting bit crowdy
* preparation to lutimes(2)
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
fs/Makefile | 2
fs/open.c | 134 ------------------------------------------------
fs/utimes.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++
include/linux/namei.h | 1
include/linux/utime.h | 2
5 files changed, 141 insertions(+), 135 deletions(-)
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -10,7 +10,7 @@ obj-y := open.o read_write.o file_table.
ioctl.o readdir.o select.o fifo.o locks.o dcache.o inode.o \
attr.o bad_inode.o file.o filesystems.o namespace.o aio.o \
seq_file.o xattr.o libfs.o fs-writeback.o mpage.o direct-io.o \
- ioprio.o pnode.o drop_caches.o splice.o sync.o
+ ioprio.o pnode.o drop_caches.o splice.o sync.o utimes.o
obj-$(CONFIG_INOTIFY) += inotify.o
obj-$(CONFIG_INOTIFY_USER) += inotify_user.o
--- a/fs/open.c
+++ b/fs/open.c
@@ -6,7 +6,6 @@
#include <linux/string.h>
#include <linux/mm.h>
-#include <linux/utime.h>
#include <linux/file.h>
#include <linux/smp_lock.h>
#include <linux/quotaops.h>
@@ -29,8 +28,6 @@ #include <linux/syscalls.h>
#include <linux/rcupdate.h>
#include <linux/audit.h>
-#include <asm/unistd.h>
-
int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
int retval = -ENODEV;
@@ -353,137 +350,6 @@ asmlinkage long sys_ftruncate64(unsigned
}
#endif
-#ifdef __ARCH_WANT_SYS_UTIME
-
-/*
- * sys_utime() can be implemented in user-level using sys_utimes().
- * Is this for backwards compatibility? If so, why not move it
- * into the appropriate arch directory (for those architectures that
- * need it).
- */
-
-/* If times==NULL, set access and modification to current time,
- * must be owner or have write permission.
- * Else, update from *times, must be owner or super user.
- */
-asmlinkage long sys_utime(char __user * filename, struct utimbuf __user * times)
-{
- int error;
- struct nameidata nd;
- struct inode * inode;
- struct iattr newattrs;
-
- error = user_path_walk(filename, &nd);
- if (error)
- goto out;
- inode = nd.dentry->d_inode;
-
- error = -EROFS;
- if (IS_RDONLY(inode))
- goto dput_and_out;
-
- /* Don't worry, the checks are done in inode_change_ok() */
- newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
- if (times) {
- error = -EPERM;
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- goto dput_and_out;
-
- error = get_user(newattrs.ia_atime.tv_sec, ×->actime);
- newattrs.ia_atime.tv_nsec = 0;
- if (!error)
- error = get_user(newattrs.ia_mtime.tv_sec, ×->modtime);
- newattrs.ia_mtime.tv_nsec = 0;
- if (error)
- goto dput_and_out;
-
- newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
- } else {
- error = -EACCES;
- if (IS_IMMUTABLE(inode))
- goto dput_and_out;
-
- if (current->fsuid != inode->i_uid &&
- (error = vfs_permission(&nd, MAY_WRITE)) != 0)
- goto dput_and_out;
- }
- mutex_lock(&inode->i_mutex);
- error = notify_change(nd.dentry, &newattrs);
- mutex_unlock(&inode->i_mutex);
-dput_and_out:
- path_release(&nd);
-out:
- return error;
-}
-
-#endif
-
-/* If times==NULL, set access and modification to current time,
- * must be owner or have write permission.
- * Else, update from *times, must be owner or super user.
- */
-long do_utimes(int dfd, char __user *filename, struct timeval *times)
-{
- int error;
- struct nameidata nd;
- struct inode * inode;
- struct iattr newattrs;
-
- error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
-
- if (error)
- goto out;
- inode = nd.dentry->d_inode;
-
- error = -EROFS;
- if (IS_RDONLY(inode))
- goto dput_and_out;
-
- /* Don't worry, the checks are done in inode_change_ok() */
- newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
- if (times) {
- error = -EPERM;
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- goto dput_and_out;
-
- newattrs.ia_atime.tv_sec = times[0].tv_sec;
- newattrs.ia_atime.tv_nsec = times[0].tv_usec * 1000;
- newattrs.ia_mtime.tv_sec = times[1].tv_sec;
- newattrs.ia_mtime.tv_nsec = times[1].tv_usec * 1000;
- newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
- } else {
- error = -EACCES;
- if (IS_IMMUTABLE(inode))
- goto dput_and_out;
-
- if (current->fsuid != inode->i_uid &&
- (error = vfs_permission(&nd, MAY_WRITE)) != 0)
- goto dput_and_out;
- }
- mutex_lock(&inode->i_mutex);
- error = notify_change(nd.dentry, &newattrs);
- mutex_unlock(&inode->i_mutex);
-dput_and_out:
- path_release(&nd);
-out:
- return error;
-}
-
-asmlinkage long sys_futimesat(int dfd, char __user *filename, struct timeval __user *utimes)
-{
- struct timeval times[2];
-
- if (utimes && copy_from_user(×, utimes, sizeof(times)))
- return -EFAULT;
- return do_utimes(dfd, filename, utimes ? times : NULL);
-}
-
-asmlinkage long sys_utimes(char __user *filename, struct timeval __user *utimes)
-{
- return sys_futimesat(AT_FDCWD, filename, utimes);
-}
-
-
/*
* access() needs to use the real uid/gid, not the effective uid/gid.
* We do this by temporarily clearing all FS-related capabilities and
--- /dev/null
+++ b/fs/utimes.c
@@ -0,0 +1,137 @@
+#include <linux/compiler.h>
+#include <linux/fs.h>
+#include <linux/linkage.h>
+#include <linux/namei.h>
+#include <linux/utime.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+
+#ifdef __ARCH_WANT_SYS_UTIME
+
+/*
+ * sys_utime() can be implemented in user-level using sys_utimes().
+ * Is this for backwards compatibility? If so, why not move it
+ * into the appropriate arch directory (for those architectures that
+ * need it).
+ */
+
+/* If times==NULL, set access and modification to current time,
+ * must be owner or have write permission.
+ * Else, update from *times, must be owner or super user.
+ */
+asmlinkage long sys_utime(char __user * filename, struct utimbuf __user * times)
+{
+ int error;
+ struct nameidata nd;
+ struct inode * inode;
+ struct iattr newattrs;
+
+ error = user_path_walk(filename, &nd);
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+
+ /* Don't worry, the checks are done in inode_change_ok() */
+ newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
+ if (times) {
+ error = -EPERM;
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+ goto dput_and_out;
+
+ error = get_user(newattrs.ia_atime.tv_sec, ×->actime);
+ newattrs.ia_atime.tv_nsec = 0;
+ if (!error)
+ error = get_user(newattrs.ia_mtime.tv_sec, ×->modtime);
+ newattrs.ia_mtime.tv_nsec = 0;
+ if (error)
+ goto dput_and_out;
+
+ newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
+ } else {
+ error = -EACCES;
+ if (IS_IMMUTABLE(inode))
+ goto dput_and_out;
+
+ if (current->fsuid != inode->i_uid &&
+ (error = vfs_permission(&nd, MAY_WRITE)) != 0)
+ goto dput_and_out;
+ }
+ mutex_lock(&inode->i_mutex);
+ error = notify_change(nd.dentry, &newattrs);
+ mutex_unlock(&inode->i_mutex);
+dput_and_out:
+ path_release(&nd);
+out:
+ return error;
+}
+
+#endif
+
+/* If times==NULL, set access and modification to current time,
+ * must be owner or have write permission.
+ * Else, update from *times, must be owner or super user.
+ */
+long do_utimes(int dfd, char __user *filename, struct timeval *times)
+{
+ int error;
+ struct nameidata nd;
+ struct inode * inode;
+ struct iattr newattrs;
+
+ error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
+
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+
+ /* Don't worry, the checks are done in inode_change_ok() */
+ newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
+ if (times) {
+ error = -EPERM;
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+ goto dput_and_out;
+
+ newattrs.ia_atime.tv_sec = times[0].tv_sec;
+ newattrs.ia_atime.tv_nsec = times[0].tv_usec * 1000;
+ newattrs.ia_mtime.tv_sec = times[1].tv_sec;
+ newattrs.ia_mtime.tv_nsec = times[1].tv_usec * 1000;
+ newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
+ } else {
+ error = -EACCES;
+ if (IS_IMMUTABLE(inode))
+ goto dput_and_out;
+
+ if (current->fsuid != inode->i_uid &&
+ (error = vfs_permission(&nd, MAY_WRITE)) != 0)
+ goto dput_and_out;
+ }
+ mutex_lock(&inode->i_mutex);
+ error = notify_change(nd.dentry, &newattrs);
+ mutex_unlock(&inode->i_mutex);
+dput_and_out:
+ path_release(&nd);
+out:
+ return error;
+}
+
+asmlinkage long sys_futimesat(int dfd, char __user *filename, struct timeval __user *utimes)
+{
+ struct timeval times[2];
+
+ if (utimes && copy_from_user(×, utimes, sizeof(times)))
+ return -EFAULT;
+ return do_utimes(dfd, filename, utimes ? times : NULL);
+}
+
+asmlinkage long sys_utimes(char __user *filename, struct timeval __user *utimes)
+{
+ return sys_futimesat(AT_FDCWD, filename, utimes);
+}
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -1,6 +1,7 @@
#ifndef _LINUX_NAMEI_H
#define _LINUX_NAMEI_H
+#include <linux/dcache.h>
#include <linux/linkage.h>
struct vfsmount;
--- a/include/linux/utime.h
+++ b/include/linux/utime.h
@@ -1,6 +1,8 @@
#ifndef _LINUX_UTIME_H
#define _LINUX_UTIME_H
+#include <linux/types.h>
+
struct utimbuf {
time_t actime;
time_t modtime;
-
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