diff options
author | Keith Mannthey <kmannth@us.ibm.com> | 2011-11-29 20:44:12 -0500 |
---|---|---|
committer | David Sterba <dsterba@suse.cz> | 2012-02-15 10:40:22 -0500 |
commit | 941b2ddf71987ef369389517a7e215dd505fe01e (patch) | |
tree | c41936dbc4201d118cc145265d0343e3b93d46f6 /fs | |
parent | d98456fcafa6f3fd1985f9b7429aaa3531c6bfa0 (diff) |
btrfs: Sector Size check during Mount
Gracefully fail when trying to mount a BTRFS file system that has a
sectorsize smaller than PAGE_SIZE.
On PPC it is possible to build a FS while using a 4k PAGE_SIZE kernel
then boot into a 64K PAGE_SIZE kernel. Presently open_ctree fails in an
endless loop and hangs the machine in this situation.
My debugging has show this Sector size < Page size to be a non trivial
situation and a graceful exit from the situation would be nice for the
time being.
Signed-off-by: Keith Mannthey <kmannth@us.ibm.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/btrfs/disk-io.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 4c867112b4c8..58d0678dfcba 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c | |||
@@ -2258,6 +2258,12 @@ struct btrfs_root *open_ctree(struct super_block *sb, | |||
2258 | goto fail_sb_buffer; | 2258 | goto fail_sb_buffer; |
2259 | } | 2259 | } |
2260 | 2260 | ||
2261 | if (sectorsize < PAGE_SIZE) { | ||
2262 | printk(KERN_WARNING "btrfs: Incompatible sector size " | ||
2263 | "found on %s\n", sb->s_id); | ||
2264 | goto fail_sb_buffer; | ||
2265 | } | ||
2266 | |||
2261 | mutex_lock(&fs_info->chunk_mutex); | 2267 | mutex_lock(&fs_info->chunk_mutex); |
2262 | ret = btrfs_read_sys_array(tree_root); | 2268 | ret = btrfs_read_sys_array(tree_root); |
2263 | mutex_unlock(&fs_info->chunk_mutex); | 2269 | mutex_unlock(&fs_info->chunk_mutex); |