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Message-ID: <456DD75E.4020001@bull.net>
Date: Wed, 29 Nov 2006 19:54:22 +0100
From: Jean-Noel Cordenner <jean-noel.cordenner@...l.net>
To: linux-ext4@...r.kernel.org
Subject: [RFC] [patch 3/3] change attribute for ext4: user interface
This patch adds a ``st_change_attribute'' field in the stat
structure, and modifies the stat(2) syscall accordingly. Currently the
change is only visible on i386 and x86_64 archs.
Signed-off-by: Celine Bourde
Signed-off-by: Alexandre Ratchov
Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@...l.net>
Index: linux-2.6.19-rc2-mm2-CA/include/asm-i386/stat.h
===================================================================
--- linux-2.6.19-rc2-mm2-CA.orig/include/asm-i386/stat.h 2006-11-09
17:21:28.000000000 +0100
+++ linux-2.6.19-rc2-mm2-CA/include/asm-i386/stat.h 2006-11-29
16:03:30.000000000 +0100
@@ -32,7 +32,7 @@
unsigned long st_mtime_nsec;
unsigned long st_ctime;
unsigned long st_ctime_nsec;
- unsigned long __unused4;
+ unsigned long st_change_attribute;
unsigned long __unused5;
};
@@ -41,7 +41,7 @@
*/
struct stat64 {
unsigned long long st_dev;
- unsigned char __pad0[4];
+ unsigned char st_change_attribute;
#define STAT64_HAS_BROKEN_ST_INO 1
unsigned long __st_ino;
Index: linux-2.6.19-rc2-mm2-CA/include/asm-x86_64/stat.h
===================================================================
--- linux-2.6.19-rc2-mm2-CA.orig/include/asm-x86_64/stat.h 2006-11-13
16:49:14.000000000 +0100
+++ linux-2.6.19-rc2-mm2-CA/include/asm-x86_64/stat.h 2006-11-29
16:04:24.000000000 +0100
@@ -23,7 +23,8 @@
unsigned long st_mtime_nsec;
unsigned long st_ctime;
unsigned long st_ctime_nsec;
- long __unused[3];
+ unsigned long st_change_attribute;
+ long __unused[2];
};
/* For 32bit emulation */
Index: linux-2.6.19-rc2-mm2-CA/include/linux/stat.h
===================================================================
--- linux-2.6.19-rc2-mm2-CA.orig/include/linux/stat.h 2006-11-09
17:21:49.000000000 +0100
+++ linux-2.6.19-rc2-mm2-CA/include/linux/stat.h 2006-11-29
16:06:02.000000000 +0100
@@ -68,6 +68,7 @@
struct timespec atime;
struct timespec mtime;
struct timespec ctime;
+ unsigned long change_attribute;
unsigned long blksize;
unsigned long long blocks;
};
Index: linux-2.6.19-rc2-mm2-CA/fs/stat.c
===================================================================
--- linux-2.6.19-rc2-mm2-CA.orig/fs/stat.c 2006-11-09 17:20:52.000000000 +0100
+++ linux-2.6.19-rc2-mm2-CA/fs/stat.c 2006-11-29 16:07:54.000000000 +0100
@@ -32,6 +32,7 @@
stat->mtime = inode->i_mtime;
stat->ctime = inode->i_ctime;
stat->size = i_size_read(inode);
+ stat->change_attribute = inode->i_change_attribute;
stat->blocks = inode->i_blocks;
stat->blksize = (1 << inode->i_blkbits);
}
@@ -233,6 +234,7 @@
tmp.st_atime = stat->atime.tv_sec;
tmp.st_mtime = stat->mtime.tv_sec;
tmp.st_ctime = stat->ctime.tv_sec;
+ tmp.st_change_attribute = stat->change_attribute;
#ifdef STAT_HAVE_NSEC
tmp.st_atime_nsec = stat->atime.tv_nsec;
tmp.st_mtime_nsec = stat->mtime.tv_nsec;
@@ -366,6 +368,7 @@
tmp.st_mtime_nsec = stat->mtime.tv_nsec;
tmp.st_ctime = stat->ctime.tv_sec;
tmp.st_ctime_nsec = stat->ctime.tv_nsec;
+ tmp.st_change_attribute = stat->change_attribute;
tmp.st_size = stat->size;
tmp.st_blocks = stat->blocks;
tmp.st_blksize = stat->blksize;
-
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