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Message-ID: <4DDCB878.4060309@gmail.com>
Date: Wed, 25 May 2011 01:06:16 -0700
From: Manish Katiyar <mkatiyar@...il.com>
To: tytso@....edu, jack@...e.cz
CC: linux-ext4@...r.kernel.org
Subject: Re: [PATCH 3/3] ext4: Update ext4 code to call journal start routine
which can fail with ENOMEM
On 05/25/2011 12:42 AM, Manish Katiyar wrote:
> Hi Jan,
>
> Posting this as a new mail for Ted's convenience. I have incorporated your
> feedback from the last patch
> (http://comments.gmane.org/gmane.comp.file-systems.ext4/24547) and updated
> the patch.
>
Please ignore the earlier patch. Here is the correct one.
a) Add a new API ext4_journal_start_failok for callers who are
ok to handle ENOMEM cases.
b) Update ext4 routines with the new API which can fail.
Signed-off-by: Manish Katiyar <mkatiyar@...il.com>
---
fs/ext4/acl.c | 5 +++--
fs/ext4/ext4_jbd2.h | 10 +++++++++-
fs/ext4/extents.c | 2 +-
fs/ext4/inode.c | 16 +++++++++-------
fs/ext4/ioctl.c | 4 ++--
fs/ext4/migrate.c | 2 +-
fs/ext4/move_extent.c | 2 +-
fs/ext4/namei.c | 23 +++++++++++++++--------
fs/ext4/super.c | 17 ++++++++++++++---
fs/ext4/xattr.c | 3 ++-
10 files changed, 57 insertions(+), 27 deletions(-)
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 93dc9a6..371dbc9 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -350,7 +350,7 @@ ext4_acl_chmod(struct inode *inode)
int retries = 0;
retry:
- handle = ext4_journal_start(inode,
+ handle = ext4_journal_start_failok(inode,
EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
@@ -450,7 +450,8 @@ ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value,
acl = NULL;
retry:
- handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+ handle = ext4_journal_start_failok(inode,
+ EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
goto release_and_out;
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 0abee1b..eae4c0a 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -161,6 +161,7 @@ int __ext4_handle_dirty_super(const char *where, unsigned int line,
#define ext4_handle_dirty_super(handle, sb) \
__ext4_handle_dirty_super(__func__, __LINE__, (handle), (sb))
+handle_t *ext4_journal_start_sb_failok(struct super_block *sb, int nblocks);
handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks);
int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle);
@@ -202,7 +203,14 @@ static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed)
return 1;
}
-static inline handle_t *ext4_journal_start(struct inode *inode, int nblocks)
+static inline handle_t *ext4_journal_start_failok(struct inode *inode,
+ int nblocks)
+{
+ return ext4_journal_start_sb_failok(inode->i_sb, nblocks);
+}
+
+static inline handle_t *ext4_journal_start(struct inode *inode,
+ int nblocks)
{
return ext4_journal_start_sb(inode->i_sb, nblocks);
}
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 4890d6f..5cb3cb2 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3685,7 +3685,7 @@ retry:
while (ret >= 0 && ret < max_blocks) {
map.m_lblk = map.m_lblk + ret;
map.m_len = max_blocks = max_blocks - ret;
- handle = ext4_journal_start(inode, credits);
+ handle = ext4_journal_start_failok(inode, credits);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
break;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f2fa5e8..6a58b04 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1624,7 +1624,7 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping,
to = from + len;
retry:
- handle = ext4_journal_start(inode, needed_blocks);
+ handle = ext4_journal_start_failok(inode, needed_blocks);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
goto out;
@@ -3126,7 +3126,7 @@ retry:
* to journalling the i_disksize update if writes to the end
* of file which has an already mapped buffer.
*/
- handle = ext4_journal_start(inode, 1);
+ handle = ext4_journal_start_failok(inode, 1);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
goto out;
@@ -3480,7 +3480,7 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
if (final_size > inode->i_size) {
/* Credits for sb + inode write */
- handle = ext4_journal_start(inode, 2);
+ handle = ext4_journal_start_failok(inode, 2);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
goto out;
@@ -5279,8 +5279,9 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
/* (user+group)*(old+new) structure, inode write (sb,
* inode block, ? - but truncate inode update has it) */
- handle = ext4_journal_start(inode, (EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)+
- EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb))+3);
+ handle = ext4_journal_start_failok(inode,
+ (EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)+
+ EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb))+3);
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
goto err_out;
@@ -5315,7 +5316,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
(ext4_test_inode_flag(inode, EXT4_INODE_EOFBLOCKS)))) {
handle_t *handle;
- handle = ext4_journal_start(inode, 3);
+ handle = ext4_journal_start_failok(inode, 3);
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
goto err_out;
@@ -5371,7 +5372,8 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
rc = ext4_acl_chmod(inode);
err_out:
- ext4_std_error(inode->i_sb, error);
+ if (error != -ENOMEM)
+ ext4_std_error(inode->i_sb, error);
if (!error)
error = rc;
return error;
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 808c554..4fc2630 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -101,7 +101,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
} else if (oldflags & EXT4_EOFBLOCKS_FL)
ext4_truncate(inode);
- handle = ext4_journal_start(inode, 1);
+ handle = ext4_journal_start_failok(inode, 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
goto flags_out;
@@ -157,7 +157,7 @@ flags_out:
goto setversion_out;
}
- handle = ext4_journal_start(inode, 1);
+ handle = ext4_journal_start_failok(inode, 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
goto setversion_out;
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index 92816b4..4ca0a3a 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -484,7 +484,7 @@ int ext4_ext_migrate(struct inode *inode)
*/
return retval;
- handle = ext4_journal_start(inode,
+ handle = ext4_journal_start_failok(inode,
EXT4_DATA_TRANS_BLOCKS(inode->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index b9f3e78..3afd60d 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -813,7 +813,7 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
* inode and donor_inode may change each different metadata blocks.
*/
jblocks = ext4_writepage_trans_blocks(orig_inode) * 2;
- handle = ext4_journal_start(orig_inode, jblocks);
+ handle = ext4_journal_start_failok(orig_inode, jblocks);
if (IS_ERR(handle)) {
*err = PTR_ERR(handle);
return 0;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 67fd0b0..0ad321b5 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1738,7 +1738,8 @@ static int ext4_create(struct inode *dir, struct dentry *dentry, int mode,
dquot_initialize(dir);
retry:
- handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ handle = ext4_journal_start_failok(dir,
+ EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
@@ -1774,7 +1775,8 @@ static int ext4_mknod(struct inode *dir, struct dentry *dentry,
dquot_initialize(dir);
retry:
- handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ handle = ext4_journal_start_failok(dir,
+ EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
@@ -1813,7 +1815,8 @@ static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
dquot_initialize(dir);
retry:
- handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ handle = ext4_journal_start_failok(dir,
+ EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
@@ -2128,7 +2131,8 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
dquot_initialize(dir);
dquot_initialize(dentry->d_inode);
- handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start_failok(dir,
+ EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -2190,7 +2194,8 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
dquot_initialize(dir);
dquot_initialize(dentry->d_inode);
- handle = ext4_journal_start(dir, EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
+ handle = ext4_journal_start_failok(dir,
+ EXT4_DELETE_TRANS_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -2248,7 +2253,8 @@ static int ext4_symlink(struct inode *dir,
dquot_initialize(dir);
retry:
- handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ handle = ext4_journal_start_failok(dir,
+ EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 5 +
EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
if (IS_ERR(handle))
@@ -2308,7 +2314,8 @@ static int ext4_link(struct dentry *old_dentry,
dquot_initialize(dir);
retry:
- handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
+ handle = ext4_journal_start_failok(dir,
+ EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS);
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -2359,7 +2366,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
* in separate transaction */
if (new_dentry->d_inode)
dquot_initialize(new_dentry->d_inode);
- handle = ext4_journal_start(old_dir, 2 *
+ handle = ext4_journal_start_failok(old_dir, 2 *
EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) +
EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2);
if (IS_ERR(handle))
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 4e4c17f..ba0776c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -247,7 +247,8 @@ static void ext4_put_nojournal(handle_t *handle)
* ext4 prevents a new handle from being started by s_frozen, which
* is in an upper layer.
*/
-handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
+static handle_t *__ext4_journal_start_sb(struct super_block *sb,
+ int nblocks, bool errok)
{
journal_t *journal;
handle_t *handle;
@@ -279,7 +280,17 @@ handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
ext4_abort(sb, "Detected aborted journal");
return ERR_PTR(-EROFS);
}
- return jbd2_journal_start(journal, nblocks, false);
+ return jbd2_journal_start(journal, nblocks, errok);
+}
+
+handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
+{
+ return __ext4_journal_start_sb(sb, nblocks, false);
+}
+
+handle_t *ext4_journal_start_sb_failok(struct super_block *sb, int nblocks)
+{
+ return __ext4_journal_start_sb(sb, nblocks, true);
}
/*
@@ -4654,7 +4665,7 @@ static int ext4_quota_off(struct super_block *sb, int type)
/* Update modification times of quota files when userspace can
* start looking at them */
- handle = ext4_journal_start(inode, 1);
+ handle = ext4_journal_start_failok(inode, 1);
if (IS_ERR(handle))
goto out;
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index b545ca1..a4be614 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1084,7 +1084,8 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name,
int error, retries = 0;
retry:
- handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+ handle = ext4_journal_start_failok(inode,
+ EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
} else {
--
1.7.4.1
--
Thanks -
Manish
--
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