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ext4: use ext4_journal_start/stop for fast commit transactions

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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@gmail.com>
Link: https://lore.kernel.org/r/20211223202140.2061101-2-harshads@google.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Harshad Shirwadkar 2021-12-23 12:21:37 -08:00 committed by Theodore Ts'o
parent 960e0ab63b
commit 2729cfdcfa
6 changed files with 4 additions and 24 deletions
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2
fs/ext4/acl.c
View File

@ -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;

3
fs/ext4/extents.c
View File

@ -4697,8 +4697,6 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
FALLOC_FL_INSERT_RANGE))
return -EOPNOTSUPP;
ext4_fc_start_update(inode);
if (mode & FALLOC_FL_PUNCH_HOLE) {
ret = ext4_punch_hole(inode, offset, len);
goto exit;
@ -4762,7 +4760,6 @@ out:
inode_unlock(inode);
trace_ext4_fallocate_exit(inode, offset, max_blocks, ret);
exit:
ext4_fc_stop_update(inode);
return ret;
}

4
fs/ext4/file.c
View File

@ -259,7 +259,6 @@ static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
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(struct kiocb *iocb,
out:
inode_unlock(inode);
ext4_fc_stop_update(inode);
if (likely(ret > 0)) {
iocb->ki_pos += ret;
ret = generic_write_sync(iocb, ret);
@ -552,9 +550,7 @@ static ssize_t ext4_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
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;

7
fs/ext4/inode.c
View File

@ -5320,7 +5320,7 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
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;
@ -5344,7 +5344,6 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
if (error) {
ext4_journal_stop(handle);
ext4_fc_stop_update(inode);
return error;
}
/* Update corresponding info in inode so that everything is in
@ -5356,7 +5355,6 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
error = ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
if (unlikely(error)) {
ext4_fc_stop_update(inode);
return error;
}
}
@ -5370,12 +5368,10 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
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;
}
@ -5499,7 +5495,6 @@ err_out:
ext4_std_error(inode->i_sb, error);
if (!error)
error = rc;
ext4_fc_stop_update(inode);
return error;
}

10
fs/ext4/ioctl.c
View File

@ -743,7 +743,6 @@ int ext4_fileattr_set(struct user_namespace *mnt_userns,
u32 flags = fa->flags;
int err = -EOPNOTSUPP;
ext4_fc_start_update(inode);
if (flags & ~EXT4_FL_USER_VISIBLE)
goto out;
@ -764,7 +763,6 @@ int ext4_fileattr_set(struct user_namespace *mnt_userns,
goto out;
err = ext4_ioctl_setproject(inode, fa->fsx_projid);
out:
ext4_fc_stop_update(inode);
return err;
}
@ -1273,13 +1271,7 @@ 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

2
fs/jbd2/journal.c
View File

@ -757,6 +757,7 @@ int jbd2_fc_begin_commit(journal_t *journal, tid_t tid)
}
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);
write_lock(&journal->j_state_lock);