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Message-ID: <20090408160541.GA1812319@fiona.linuxhacker.ru>
Date: Wed, 8 Apr 2009 20:05:42 +0400
From: Oleg Drokin <green@...uxhacker.ru>
To: linux-fsdevel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] Separate out common fstatat code into vfs_fstatat
This is a version incorporating Christoph's suggestion.
Separate out common *fstatat functionality into a single function
instead of duplicating it all over the code.
Signed-off-by: Oleg Drokin <green@...uxhacker.ru>
arch/arm/kernel/sys_oabi-compat.c | 19 +++---------
arch/s390/kernel/compat_linux.c | 18 +++---------
arch/sparc/kernel/sys_sparc32.c | 19 +++---------
arch/x86/ia32/sys_ia32.c | 19 +++---------
fs/compat.c | 19 +++---------
fs/stat.c | 56 +++++++++++++++++++-------------------
include/linux/fs.h | 1
7 files changed, 54 insertions(+), 97 deletions(-)
Index: linux-2.6.29/arch/arm/kernel/sys_oabi-compat.c
===================================================================
--- linux-2.6.29.orig/arch/arm/kernel/sys_oabi-compat.c 2009-04-08 01:47:52.000000000 -0400
+++ linux-2.6.29/arch/arm/kernel/sys_oabi-compat.c 2009-04-08 11:44:30.000000000 -0400
@@ -176,21 +176,12 @@
int flag)
{
struct kstat stat;
- int error = -EINVAL;
+ int error;
- if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
- goto out;
-
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, &stat);
- else
- error = vfs_stat_fd(dfd, filename, &stat);
-
- if (!error)
- error = cp_oldabi_stat64(&stat, statbuf);
-
-out:
- return error;
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_oldabi_stat64(&stat, statbuf);
}
struct oabi_flock64 {
Index: linux-2.6.29/arch/s390/kernel/compat_linux.c
===================================================================
--- linux-2.6.29.orig/arch/s390/kernel/compat_linux.c 2009-04-08 01:47:52.000000000 -0400
+++ linux-2.6.29/arch/s390/kernel/compat_linux.c 2009-04-08 11:44:38.000000000 -0400
@@ -702,20 +702,12 @@
struct stat64_emu31 __user* statbuf, int flag)
{
struct kstat stat;
- int error = -EINVAL;
+ int error;
- if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
- goto out;
-
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, &stat);
- else
- error = vfs_stat_fd(dfd, filename, &stat);
-
- if (!error)
- error = cp_stat64(statbuf, &stat);
-out:
- return error;
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_stat64(statbuf, &stat);
}
/*
Index: linux-2.6.29/arch/sparc/kernel/sys_sparc32.c
===================================================================
--- linux-2.6.29.orig/arch/sparc/kernel/sys_sparc32.c 2009-04-08 01:47:52.000000000 -0400
+++ linux-2.6.29/arch/sparc/kernel/sys_sparc32.c 2009-04-08 11:44:47.000000000 -0400
@@ -206,21 +206,12 @@
struct compat_stat64 __user * statbuf, int flag)
{
struct kstat stat;
- int error = -EINVAL;
-
- if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
- goto out;
-
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, &stat);
- else
- error = vfs_stat_fd(dfd, filename, &stat);
-
- if (!error)
- error = cp_compat_stat64(&stat, statbuf);
+ int error;
-out:
- return error;
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_compat_stat64(&stat, statbuf);
}
asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
Index: linux-2.6.29/arch/x86/ia32/sys_ia32.c
===================================================================
--- linux-2.6.29.orig/arch/x86/ia32/sys_ia32.c 2009-04-08 01:47:52.000000000 -0400
+++ linux-2.6.29/arch/x86/ia32/sys_ia32.c 2009-04-08 11:44:54.000000000 -0400
@@ -129,21 +129,12 @@
struct stat64 __user *statbuf, int flag)
{
struct kstat stat;
- int error = -EINVAL;
+ int error;
- if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
- goto out;
-
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, &stat);
- else
- error = vfs_stat_fd(dfd, filename, &stat);
-
- if (!error)
- error = cp_stat64(statbuf, &stat);
-
-out:
- return error;
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_stat64(statbuf, &stat);
}
/*
Index: linux-2.6.29/fs/compat.c
===================================================================
--- linux-2.6.29.orig/fs/compat.c 2009-04-08 01:47:52.000000000 -0400
+++ linux-2.6.29/fs/compat.c 2009-04-08 11:44:17.000000000 -0400
@@ -203,21 +203,12 @@
struct compat_stat __user *statbuf, int flag)
{
struct kstat stat;
- int error = -EINVAL;
-
- if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
- goto out;
-
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, &stat);
- else
- error = vfs_stat_fd(dfd, filename, &stat);
-
- if (!error)
- error = cp_compat_stat(&stat, statbuf);
+ int error;
-out:
- return error;
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_compat_stat(&stat, statbuf);
}
#endif
Index: linux-2.6.29/fs/stat.c
===================================================================
--- linux-2.6.29.orig/fs/stat.c 2009-04-08 01:47:52.000000000 -0400
+++ linux-2.6.29/fs/stat.c 2009-04-08 11:47:19.000000000 -0400
@@ -109,6 +109,24 @@
EXPORT_SYMBOL(vfs_fstat);
+int vfs_fstatat(int dfd, char __user *filename, struct kstat *stat, int flag)
+{
+ int error = -EINVAL;
+
+ if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
+ goto out;
+
+ if (flag & AT_SYMLINK_NOFOLLOW)
+ error = vfs_lstat_fd(dfd, filename, stat);
+ else
+ error = vfs_stat_fd(dfd, filename, stat);
+out:
+ return error;
+}
+
+EXPORT_SYMBOL(vfs_fstatat);
+
+
#ifdef __ARCH_WANT_OLD_STAT
/*
@@ -264,21 +282,12 @@
struct stat __user *, statbuf, int, flag)
{
struct kstat stat;
- int error = -EINVAL;
-
- if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
- goto out;
-
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, &stat);
- else
- error = vfs_stat_fd(dfd, filename, &stat);
-
- if (!error)
- error = cp_new_stat(&stat, statbuf);
+ int error;
-out:
- return error;
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_new_stat(&stat, statbuf);
}
#endif
@@ -404,21 +413,12 @@
struct stat64 __user *, statbuf, int, flag)
{
struct kstat stat;
- int error = -EINVAL;
-
- if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
- goto out;
-
- if (flag & AT_SYMLINK_NOFOLLOW)
- error = vfs_lstat_fd(dfd, filename, &stat);
- else
- error = vfs_stat_fd(dfd, filename, &stat);
-
- if (!error)
- error = cp_new_stat64(&stat, statbuf);
+ int error;
-out:
- return error;
+ error = vfs_fstatat(dfd, filename, &stat, flag);
+ if (error)
+ return error;
+ return cp_new_stat64(&stat, statbuf);
}
#endif /* __ARCH_WANT_STAT64 */
Index: linux-2.6.29/include/linux/fs.h
===================================================================
--- linux-2.6.29.orig/include/linux/fs.h 2009-04-08 01:47:52.000000000 -0400
+++ linux-2.6.29/include/linux/fs.h 2009-04-08 11:47:38.000000000 -0400
@@ -2075,6 +2075,7 @@
extern int vfs_stat_fd(int dfd, char __user *, struct kstat *);
extern int vfs_lstat_fd(int dfd, char __user *, struct kstat *);
extern int vfs_fstat(unsigned int, struct kstat *);
+extern int vfs_fstatat(int , char __user *, struct kstat *, int);
extern int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
unsigned long arg);
--
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