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Date: Tue, 16 Oct 2007 23:27:21 -0700
From: akpm@...ux-foundation.org
To: torvalds@...ux-foundation.org
Cc: akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
bfields@...ldses.org, hch@....de, linux-ext4@...r.kernel.org,
mark.fasheh@...cle.com, mbligh@...gle.com, rdunlap@...otime.net,
trond.myklebust@....uio.no, viro@....linux.org.uk
Subject: [patch 144/327] Fix f_version type: should be u64 instead of unsigned long
From: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Fix f_version type: should be u64 instead of long
There is a type inconsistency between struct inode i_version and struct file
f_version.
fs.h:
struct inode
u64 i_version;
and
struct file
unsigned long f_version;
Users do:
fs/ext3/dir.c:
if (filp->f_version != inode->i_version) {
So why isn't f_version a u64 ? It becomes a problem if versions gets
higher than 2^32 and we are on an architecture where longs are 32 bits.
This patch changes the f_version type to u64, and updates the users accordingly.
It applies to 2.6.23-rc2-mm2.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc: Martin Bligh <mbligh@...gle.com>
Cc: "Randy.Dunlap" <rdunlap@...otime.net>
Cc: Al Viro <viro@....linux.org.uk>
Cc: <linux-ext4@...r.kernel.org>
Cc: Mark Fasheh <mark.fasheh@...cle.com>
Cc: Christoph Hellwig <hch@....de>
Cc: "J. Bruce Fields" <bfields@...ldses.org>
Cc: Trond Myklebust <trond.myklebust@....uio.no>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
fs/ext3/dir.c | 2 +-
fs/ext4/dir.c | 2 +-
fs/ocfs2/dir.c | 10 +++++-----
fs/proc/base.c | 4 ++--
include/linux/fs.h | 2 +-
include/linux/seq_file.h | 2 +-
6 files changed, 11 insertions(+), 11 deletions(-)
diff -puN fs/ext3/dir.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long fs/ext3/dir.c
--- a/fs/ext3/dir.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long
+++ a/fs/ext3/dir.c
@@ -210,7 +210,7 @@ revalidate:
* not the directory has been modified
* during the copy operation.
*/
- unsigned long version = filp->f_version;
+ u64 version = filp->f_version;
error = filldir(dirent, de->name,
de->name_len,
diff -puN fs/ext4/dir.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long fs/ext4/dir.c
--- a/fs/ext4/dir.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long
+++ a/fs/ext4/dir.c
@@ -210,7 +210,7 @@ revalidate:
* not the directory has been modified
* during the copy operation.
*/
- unsigned long version = filp->f_version;
+ u64 version = filp->f_version;
error = filldir(dirent, de->name,
de->name_len,
diff -puN fs/ocfs2/dir.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long fs/ocfs2/dir.c
--- a/fs/ocfs2/dir.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long
+++ a/fs/ocfs2/dir.c
@@ -586,7 +586,7 @@ bail:
}
static int ocfs2_dir_foreach_blk_id(struct inode *inode,
- unsigned long *f_version,
+ u64 *f_version,
loff_t *f_pos, void *priv,
filldir_t filldir, int *filldir_err)
{
@@ -648,7 +648,7 @@ revalidate:
* not the directory has been modified
* during the copy operation.
*/
- unsigned long version = *f_version;
+ u64 version = *f_version;
unsigned char d_type = DT_UNKNOWN;
if (de->file_type < OCFS2_FT_MAX)
@@ -677,7 +677,7 @@ out:
}
static int ocfs2_dir_foreach_blk_el(struct inode *inode,
- unsigned long *f_version,
+ u64 *f_version,
loff_t *f_pos, void *priv,
filldir_t filldir, int *filldir_err)
{
@@ -798,7 +798,7 @@ out:
return stored;
}
-static int ocfs2_dir_foreach_blk(struct inode *inode, unsigned long *f_version,
+static int ocfs2_dir_foreach_blk(struct inode *inode, u64 *f_version,
loff_t *f_pos, void *priv, filldir_t filldir,
int *filldir_err)
{
@@ -818,7 +818,7 @@ int ocfs2_dir_foreach(struct inode *inod
filldir_t filldir)
{
int ret = 0, filldir_err = 0;
- unsigned long version = inode->i_version;
+ u64 version = inode->i_version;
while (*f_pos < i_size_read(inode)) {
ret = ocfs2_dir_foreach_blk(inode, &version, f_pos, priv,
diff -puN fs/proc/base.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long fs/proc/base.c
--- a/fs/proc/base.c~fix-f_version-type-should-be-u64-instead-of-unsigned-long
+++ a/fs/proc/base.c
@@ -2586,7 +2586,7 @@ static int proc_task_readdir(struct file
/* f_version caches the tgid value that the last readdir call couldn't
* return. lseek aka telldir automagically resets f_version to 0.
*/
- tid = filp->f_version;
+ tid = (int)filp->f_version;
filp->f_version = 0;
for (task = first_tid(leader, tid, pos - 2);
task;
@@ -2595,7 +2595,7 @@ static int proc_task_readdir(struct file
if (proc_task_fill_cache(filp, dirent, filldir, task, tid) < 0) {
/* returning this tgid failed, save it as the first
* pid for the next readir call */
- filp->f_version = tid;
+ filp->f_version = (u64)tid;
put_task_struct(task);
break;
}
diff -puN include/linux/fs.h~fix-f_version-type-should-be-u64-instead-of-unsigned-long include/linux/fs.h
--- a/include/linux/fs.h~fix-f_version-type-should-be-u64-instead-of-unsigned-long
+++ a/include/linux/fs.h
@@ -792,7 +792,7 @@ struct file {
unsigned int f_uid, f_gid;
struct file_ra_state f_ra;
- unsigned long f_version;
+ u64 f_version;
#ifdef CONFIG_SECURITY
void *f_security;
#endif
diff -puN include/linux/seq_file.h~fix-f_version-type-should-be-u64-instead-of-unsigned-long include/linux/seq_file.h
--- a/include/linux/seq_file.h~fix-f_version-type-should-be-u64-instead-of-unsigned-long
+++ a/include/linux/seq_file.h
@@ -18,7 +18,7 @@ struct seq_file {
size_t from;
size_t count;
loff_t index;
- loff_t version;
+ u64 version;
struct mutex lock;
const struct seq_operations *op;
void *private;
_
-
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