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jbd2, ext4, ocfs2: introduce/use journal callbacks j_submit|finish_inode_data_buffers()

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Introduce journal callbacks to allow different behaviors
for an inode in journal_submit|finish_inode_data_buffers().

The existing users of the current behavior (ext4, ocfs2)
are adapted to use the previously exported functions
that implement the current behavior.

Users are callers of jbd2_journal_inode_ranged_write|wait(),
which adds the inode to the transaction's inode list with
the JI_WRITE|WAIT_DATA flags. Only ext4 and ocfs2 in-tree.

Both CONFIG_EXT4_FS and CONFIG_OCSFS2_FS select CONFIG_JBD2,
which builds fs/jbd2/commit.c and journal.c that define and
export the functions, so we can call directly in ext4/ocfs2.

Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/20201006004841.600488-3-mfo@canonical.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Mauricio Faria de Oliveira
2020-10-05 21:48:39 -03:00
committed by Theodore Ts'o
parent aa3c0c61f6
commit 342af94ec6
4 changed files with 50 additions and 13 deletions
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30
fs/jbd2/commit.c
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@@ -197,6 +197,12 @@ int jbd2_journal_submit_inode_data_buffers(struct jbd2_inode *jinode)
.range_end = jinode->i_dirty_end,
};
/*
* submit the inode data buffers. We use writepage
* instead of writepages. Because writepages can do
* block allocation with delalloc. We need to write
* only allocated blocks here.
*/
return generic_writepages(mapping, &wbc);
}
@@ -220,16 +226,13 @@ static int journal_submit_data_buffers(journal_t *journal,
continue;
jinode->i_flags |= JI_COMMIT_RUNNING;
spin_unlock(&journal->j_list_lock);
/*
* submit the inode data buffers. We use writepage
* instead of writepages. Because writepages can do
* block allocation with delalloc. We need to write
* only allocated blocks here.
*/
/* submit the inode data buffers. */
trace_jbd2_submit_inode_data(jinode->i_vfs_inode);
err = jbd2_journal_submit_inode_data_buffers(jinode);
if (!ret)
ret = err;
if (journal->j_submit_inode_data_buffers) {
err = journal->j_submit_inode_data_buffers(jinode);
if (!ret)
ret = err;
}
spin_lock(&journal->j_list_lock);
J_ASSERT(jinode->i_transaction == commit_transaction);
jinode->i_flags &= ~JI_COMMIT_RUNNING;
@@ -267,9 +270,12 @@ static int journal_finish_inode_data_buffers(journal_t *journal,
continue;
jinode->i_flags |= JI_COMMIT_RUNNING;
spin_unlock(&journal->j_list_lock);
err = jbd2_journal_finish_inode_data_buffers(jinode);
if (!ret)
ret = err;
/* wait for the inode data buffers writeout. */
if (journal->j_finish_inode_data_buffers) {
err = journal->j_finish_inode_data_buffers(jinode);
if (!ret)
ret = err;
}
spin_lock(&journal->j_list_lock);
jinode->i_flags &= ~JI_COMMIT_RUNNING;
smp_mb();