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Date: Tue, 15 May 2012 10:33:16 -0400
From: Josef Bacik <josef@...hat.com>
To: linux-ext4@...r.kernel.org, linux-nfs@...r.kernel.org,
bfields@...ldses.org, adilger@...ger.ca, tytso@....edu,
jack@...e.cz
Subject: [PATCH] ext4: fix how i_version is modified and turn it on by default V2
This makes MS_I_VERSION be turned on by default. Ext4 had been
unconditionally doing i_version++ in a few cases anway so the mount option
was kind of silly. This patch also removes the update in mark_inode_dirty
and makes all of the cases where we update ctime also do inode_inc_iversion.
file_update_time takes care of the write case and all the places where we
update iversion are protected by the i_mutex so there should be no extra
i_lock overhead in the normal non-exported fs case. Thanks,
Signed-off-by: Josef Bacik <josef@...hat.com>
---
V1->V2: introduce ext4_inode_update_time helper to update ctime/time and
i_version to make the code a little easier and make it less fragile.
fs/ext4/acl.c | 2 +-
fs/ext4/ext4.h | 16 ++++++++++++++++
fs/ext4/extents.c | 13 ++++---------
fs/ext4/indirect.c | 2 +-
fs/ext4/inode.c | 3 ---
fs/ext4/ioctl.c | 4 ++--
fs/ext4/namei.c | 24 ++++++++++--------------
fs/ext4/super.c | 6 +++---
fs/ext4/xattr.c | 2 +-
9 files changed, 38 insertions(+), 34 deletions(-)
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index a5c29bb..c445d3a 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -202,7 +202,7 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
if (error < 0)
return error;
else {
- inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME);
ext4_mark_inode_dirty(handle, inode);
if (error == 0)
acl = NULL;
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 513004f..9ff4bdb 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1276,6 +1276,22 @@ static inline struct timespec ext4_current_time(struct inode *inode)
current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
}
+enum time_update {
+ MTIME = 1,
+ CTIME = 2,
+};
+
+static inline void ext4_inode_update_time(struct inode *inode, int flags)
+{
+ inode_inc_iversion(inode);
+
+ if (flags & MTIME)
+ inode->i_mtime = ext4_current_time(inode);
+ if (flags & CTIME)
+ inode->i_ctime = ext4_current_time(inode);
+}
+
+
static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
{
return ino == EXT4_ROOT_INO ||
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 74f23c2..5c2b4cf 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4249,7 +4249,7 @@ out_stop:
if (inode->i_nlink)
ext4_orphan_del(handle, inode);
- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME | MTIME);
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
}
@@ -4257,13 +4257,8 @@ out_stop:
static void ext4_falloc_update_inode(struct inode *inode,
int mode, loff_t new_size, int update_ctime)
{
- struct timespec now;
-
- if (update_ctime) {
- now = current_fs_time(inode->i_sb);
- if (!timespec_equal(&inode->i_ctime, &now))
- inode->i_ctime = now;
- }
+ if (update_ctime)
+ ext4_inode_update_time(inode, CTIME);
/*
* Update only when preallocation was requested beyond
* the file size.
@@ -4905,7 +4900,7 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length)
out:
ext4_orphan_del(handle, inode);
- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME | MTIME);
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
return err;
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 830e1b2..a63a4ad 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1476,7 +1476,7 @@ do_indirects:
out_unlock:
up_write(&ei->i_data_sem);
- inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME | MTIME);
ext4_mark_inode_dirty(handle, inode);
/*
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index feaa82f..d11b4e5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4314,9 +4314,6 @@ int ext4_mark_iloc_dirty(handle_t *handle,
{
int err = 0;
- if (test_opt(inode->i_sb, I_VERSION))
- inode_inc_iversion(inode);
-
/* the do_update_inode consumes one bh->b_count */
get_bh(iloc->bh);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 6eee255..a162faf 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -120,7 +120,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
ei->i_flags = flags;
ext4_set_inode_flags(inode);
- inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME);
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
@@ -168,7 +168,7 @@ flags_out:
}
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err == 0) {
- inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME);
inode->i_generation = generation;
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
}
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2043f48..c8417e6 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1316,9 +1316,8 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
* happen is that the times are slightly out of date
* and/or different from the directory change time.
*/
- dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
+ ext4_inode_update_time(dir, CTIME | MTIME);
ext4_update_dx_flag(dir);
- dir->i_version++;
ext4_mark_inode_dirty(handle, dir);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, dir, bh);
@@ -1668,7 +1667,6 @@ static int ext4_delete_entry(handle_t *handle,
blocksize);
else
de->inode = 0;
- dir->i_version++;
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
err = ext4_handle_dirty_metadata(handle, dir, bh);
if (unlikely(err)) {
@@ -2158,14 +2156,14 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
ext4_warning(inode->i_sb,
"empty directory has too many links (%d)",
inode->i_nlink);
- inode->i_version++;
clear_nlink(inode);
/* There's no need to set i_disksize: the fact that i_nlink is
* zero will ensure that the right thing happens during any
* recovery. */
inode->i_size = 0;
ext4_orphan_add(handle, inode);
- inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME);
+ ext4_inode_update_time(dir, CTIME | MTIME);
ext4_mark_inode_dirty(handle, inode);
ext4_dec_count(handle, dir);
ext4_update_dx_flag(dir);
@@ -2218,13 +2216,13 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
retval = ext4_delete_entry(handle, dir, de, bh);
if (retval)
goto end_unlink;
- dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
+ ext4_inode_update_time(dir, MTIME | CTIME);
ext4_update_dx_flag(dir);
ext4_mark_inode_dirty(handle, dir);
drop_nlink(inode);
if (!inode->i_nlink)
ext4_orphan_add(handle, inode);
- inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME);
ext4_mark_inode_dirty(handle, inode);
retval = 0;
@@ -2363,7 +2361,7 @@ retry:
if (IS_DIRSYNC(dir))
ext4_handle_sync(handle);
- inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME);
ext4_inc_count(handle, inode);
ihold(inode);
@@ -2470,9 +2468,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
if (EXT4_HAS_INCOMPAT_FEATURE(new_dir->i_sb,
EXT4_FEATURE_INCOMPAT_FILETYPE))
new_de->file_type = old_de->file_type;
- new_dir->i_version++;
- new_dir->i_ctime = new_dir->i_mtime =
- ext4_current_time(new_dir);
+ ext4_inode_update_time(new_dir, CTIME | MTIME);
ext4_mark_inode_dirty(handle, new_dir);
BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata");
retval = ext4_handle_dirty_metadata(handle, new_dir, new_bh);
@@ -2488,7 +2484,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
* Like most other Unix systems, set the ctime for inodes on a
* rename.
*/
- old_inode->i_ctime = ext4_current_time(old_inode);
+ ext4_inode_update_time(old_inode, CTIME);
ext4_mark_inode_dirty(handle, old_inode);
/*
@@ -2521,9 +2517,9 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_inode) {
ext4_dec_count(handle, new_inode);
- new_inode->i_ctime = ext4_current_time(new_inode);
+ ext4_inode_update_time(new_inode, CTIME);
}
- old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
+ ext4_inode_update_time(old_dir, CTIME | MTIME);
ext4_update_dx_flag(old_dir);
if (dir_bh) {
PARENT_INO(dir_bh->b_data, new_dir->i_sb->s_blocksize) =
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 502c61f..98d6863 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1813,8 +1813,7 @@ set_qf_format:
"Ignoring deprecated bh option");
break;
case Opt_i_version:
- set_opt(sb, I_VERSION);
- sb->s_flags |= MS_I_VERSION;
+ /* On by default now */
break;
case Opt_nodelalloc:
clear_opt(sb, DELALLOC);
@@ -3132,6 +3131,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto out_free_orig;
}
sb->s_fs_info = sbi;
+ sb->s_flags |= MS_I_VERSION;
sbi->s_mount_opt = 0;
sbi->s_resuid = EXT4_DEF_RESUID;
sbi->s_resgid = EXT4_DEF_RESGID;
@@ -4831,7 +4831,7 @@ static int ext4_quota_off(struct super_block *sb, int type)
handle = ext4_journal_start(inode, 1);
if (IS_ERR(handle))
goto out;
- inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ ext4_inode_update_time(inode, CTIME | MTIME);
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 93a00d8..e8bcc6f 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1048,7 +1048,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
}
if (!error) {
ext4_xattr_update_super_block(handle, inode->i_sb);
- inode->i_ctime = ext4_current_time(inode);
+ ext4_inode_update_time(inode, CTIME);
if (!value)
ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
--
1.7.7.6
--
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