This is a note to let you know that I've just added the patch titled
ext4: use ext4_journal_start/stop for fast commit transactions
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ext4-use-ext4_journal_start-stop-for-fast-commit-transactions.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2729cfdcfa1cc49bef5a90d046fa4a187fdfcc69 Mon Sep 17 00:00:00 2001
From: Harshad Shirwadkar <harshadshirwadkar@xxxxxxxxx>
Date: Thu, 23 Dec 2021 12:21:37 -0800
Subject: ext4: use ext4_journal_start/stop for fast commit transactions
From: Harshad Shirwadkar <harshadshirwadkar@xxxxxxxxx>
commit 2729cfdcfa1cc49bef5a90d046fa4a187fdfcc69 upstream.
This patch drops all calls to ext4_fc_start_update() and
ext4_fc_stop_update(). To ensure that there are no ongoing journal
updates during fast commit, we also make jbd2_fc_begin_commit() lock
journal for updates. This way we don't have to maintain two different
transaction start stop APIs for fast commit and full commit. This
patch doesn't remove the functions altogether since in future we want
to have inode level locking for fast commits.
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@xxxxxxxxx>
Link: https://lore.kernel.org/r/20211223202140.2061101-2-harshads@xxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/acl.c | 2 --
fs/ext4/extents.c | 3 ---
fs/ext4/file.c | 4 ----
fs/ext4/inode.c | 7 +------
fs/ext4/ioctl.c | 10 +---------
fs/jbd2/journal.c | 2 ++
6 files changed, 4 insertions(+), 24 deletions(-)
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -246,7 +246,6 @@ retry:
handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
if (IS_ERR(handle))
return PTR_ERR(handle);
- ext4_fc_start_update(inode);
if ((type == ACL_TYPE_ACCESS) && acl) {
error = posix_acl_update_mode(mnt_userns, inode, &mode, &acl);
@@ -264,7 +263,6 @@ retry:
}
out_stop:
ext4_journal_stop(handle);
- ext4_fc_stop_update(inode);
if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry;
return error;
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4701,8 +4701,6 @@ long ext4_fallocate(struct file *file, i
FALLOC_FL_INSERT_RANGE))
return -EOPNOTSUPP;
- ext4_fc_start_update(inode);
-
inode_lock(inode);
ret = ext4_convert_inline_data(inode);
inode_unlock(inode);
@@ -4772,7 +4770,6 @@ out:
inode_unlock(inode);
trace_ext4_fallocate_exit(inode, offset, max_blocks, ret);
exit:
- ext4_fc_stop_update(inode);
return ret;
}
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -259,7 +259,6 @@ static ssize_t ext4_buffered_write_iter(
if (iocb->ki_flags & IOCB_NOWAIT)
return -EOPNOTSUPP;
- ext4_fc_start_update(inode);
inode_lock(inode);
ret = ext4_write_checks(iocb, from);
if (ret <= 0)
@@ -271,7 +270,6 @@ static ssize_t ext4_buffered_write_iter(
out:
inode_unlock(inode);
- ext4_fc_stop_update(inode);
if (likely(ret > 0)) {
iocb->ki_pos += ret;
ret = generic_write_sync(iocb, ret);
@@ -558,9 +556,7 @@ static ssize_t ext4_dio_write_iter(struc
goto out;
}
- ext4_fc_start_update(inode);
ret = ext4_orphan_add(handle, inode);
- ext4_fc_stop_update(inode);
if (ret) {
ext4_journal_stop(handle);
goto out;
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5366,7 +5366,7 @@ int ext4_setattr(struct user_namespace *
if (error)
return error;
}
- ext4_fc_start_update(inode);
+
if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
(ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
handle_t *handle;
@@ -5390,7 +5390,6 @@ int ext4_setattr(struct user_namespace *
if (error) {
ext4_journal_stop(handle);
- ext4_fc_stop_update(inode);
return error;
}
/* Update corresponding info in inode so that everything is in
@@ -5402,7 +5401,6 @@ int ext4_setattr(struct user_namespace *
error = ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
if (unlikely(error)) {
- ext4_fc_stop_update(inode);
return error;
}
}
@@ -5417,12 +5415,10 @@ int ext4_setattr(struct user_namespace *
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
if (attr->ia_size > sbi->s_bitmap_maxbytes) {
- ext4_fc_stop_update(inode);
return -EFBIG;
}
}
if (!S_ISREG(inode->i_mode)) {
- ext4_fc_stop_update(inode);
return -EINVAL;
}
@@ -5548,7 +5544,6 @@ err_out:
ext4_std_error(inode->i_sb, error);
if (!error)
error = rc;
- ext4_fc_stop_update(inode);
return error;
}
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -744,7 +744,6 @@ int ext4_fileattr_set(struct user_namesp
u32 flags = fa->flags;
int err = -EOPNOTSUPP;
- ext4_fc_start_update(inode);
if (flags & ~EXT4_FL_USER_VISIBLE)
goto out;
@@ -765,7 +764,6 @@ int ext4_fileattr_set(struct user_namesp
goto out;
err = ext4_ioctl_setproject(inode, fa->fsx_projid);
out:
- ext4_fc_stop_update(inode);
return err;
}
@@ -1272,13 +1270,7 @@ resizefs_out:
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
- long ret;
-
- ext4_fc_start_update(file_inode(filp));
- ret = __ext4_ioctl(filp, cmd, arg);
- ext4_fc_stop_update(file_inode(filp));
-
- return ret;
+ return __ext4_ioctl(filp, cmd, arg);
}
#ifdef CONFIG_COMPAT
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -757,6 +757,7 @@ int jbd2_fc_begin_commit(journal_t *jour
}
journal->j_flags |= JBD2_FAST_COMMIT_ONGOING;
write_unlock(&journal->j_state_lock);
+ jbd2_journal_lock_updates(journal);
return 0;
}
@@ -768,6 +769,7 @@ EXPORT_SYMBOL(jbd2_fc_begin_commit);
*/
static int __jbd2_fc_end_commit(journal_t *journal, tid_t tid, bool fallback)
{
+ jbd2_journal_unlock_updates(journal);
if (journal->j_fc_cleanup_callback)
journal->j_fc_cleanup_callback(journal, 0, tid);
write_lock(&journal->j_state_lock);
Patches currently in stable-queue which might be from harshadshirwadkar@xxxxxxxxx are
queue-5.15/ext4-use-ext4_journal_start-stop-for-fast-commit-transactions.patch
