From 7dc4f001123f9ebe3b010a6c26acd18698ad205f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 23 Nov 2010 14:37:57 +0100 Subject: hfsplus: make sure sync writes out all metadata hfsplus stores all metadata except for the volume headers in special inodes. While these are marked hashed and periodically written out by the flusher threads, we can't rely on that for sync. For the case of a data integrity sync the VM has life-lock avoidance code that avoids writing inodes again that are redirtied during the sync, which is something that can happen easily for hfsplus. So make sure we explicitly write out the metadata inodes at the beginning of hfsplus_sync_fs. Signed-off-by: Christoph Hellwig --- fs/hfsplus/super.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index fe8f7bffbea5..df6bea02b2b4 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -164,6 +164,22 @@ int hfsplus_sync_fs(struct super_block *sb, int wait) sb->s_dirt = 0; + /* + * Explicitly write out the special metadata inodes. + * + * While these special inodes are marked as hashed and written + * out peridocically by the flusher threads we redirty them + * during writeout of normal inodes, and thus the life lock + * prevents us from getting the latest state to disk. + */ + error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); + error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); + if (!error) + error = error2; + error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); + if (!error) + error = error2; + mutex_lock(&sbi->vh_mutex); mutex_lock(&sbi->alloc_mutex); vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); @@ -176,9 +192,11 @@ int hfsplus_sync_fs(struct super_block *sb, int wait) write_backup = 1; } - error = hfsplus_submit_bio(sb->s_bdev, + error2 = hfsplus_submit_bio(sb->s_bdev, sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, sbi->s_vhdr, WRITE_SYNC); + if (!error) + error = error2; if (!write_backup) goto out; -- cgit v1.2.3