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Btrfs: flush out and clean up any block device pages during mount

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Btrfs puts the filesystem metadata into its own address space, and
somehow the block device address space isn't getting onto disk properly
before a mount.  The end result is that a loop of mkfs and mounting the
filesystem will sometimes find stale or incorrect data.

This commit should fix it by sprinkling fdatawrites and invalidate_bdev
calls around.  This is a short term measure to make sure it is fixed.
The block devices really should be flushed and cleaned up higher in the
stack.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2012-03-27 18:56:56 -04:00
parent 98961a7e43
commit 3c4bb26b21
2 changed files with 4 additions and 0 deletions
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1
fs/btrfs/disk-io.c
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@ -2031,6 +2031,7 @@ int open_ctree(struct super_block *sb,
__setup_root(4096, 4096, 4096, 4096, tree_root,
fs_info, BTRFS_ROOT_TREE_OBJECTID);
invalidate_bdev(fs_devices->latest_bdev);
bh = btrfs_read_dev_super(fs_devices->latest_bdev);
if (!bh) {
err = -EINVAL;

3
fs/btrfs/volumes.c
View file

@ -622,6 +622,8 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
printk(KERN_INFO "open %s failed\n", device->name);
goto error;
}
filemap_write_and_wait(bdev->bd_inode->i_mapping);
invalidate_bdev(bdev);
set_blocksize(bdev, 4096);
bh = btrfs_read_dev_super(bdev);
@ -1354,6 +1356,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
}
set_blocksize(bdev, 4096);
invalidate_bdev(bdev);
bh = btrfs_read_dev_super(bdev);
if (!bh) {
ret = -EINVAL;