diff options
| author | Jan Kara <jack@suse.cz> | 2012-12-20 00:07:18 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-01-16 01:13:11 +0000 |
| commit | f21cf73c565eaff16be12637435dd96b84a8e50f (patch) | |
| tree | 62af23e1bd4e1ab56638dc237149e6a4b5983a03 | |
| parent | 29abfe4ddc74a2a597f4a47f02df1f5c4ad4a521 (diff) | |
ext4: check dioread_nolock on remount
commit 261cb20cb2f0737a247aaf08dff7eb065e3e5b66 upstream.
Currently we allow enabling dioread_nolock mount option on remount for
filesystems where blocksize < PAGE_CACHE_SIZE. This isn't really
supported so fix the bug by moving the check for blocksize !=
PAGE_CACHE_SIZE into parse_options(). Change the original PAGE_SIZE to
PAGE_CACHE_SIZE along the way because that's what we are really
interested in.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | fs/ext4/super.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index f8d5fcef92bd..4e03de4da83f 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1942,6 +1942,16 @@ set_qf_format: } } #endif + if (test_opt(sb, DIOREAD_NOLOCK)) { + int blocksize = + BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); + + if (blocksize < PAGE_CACHE_SIZE) { + ext4_msg(sb, KERN_ERR, "can't mount with " + "dioread_nolock if block size != PAGE_SIZE"); + return 0; + } + } return 1; } @@ -3367,15 +3377,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) clear_opt(sb, DELALLOC); } - blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); - if (test_opt(sb, DIOREAD_NOLOCK)) { - if (blocksize < PAGE_SIZE) { - ext4_msg(sb, KERN_ERR, "can't mount with " - "dioread_nolock if block size != PAGE_SIZE"); - goto failed_mount; - } - } - sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); @@ -3417,6 +3418,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) goto failed_mount; + blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); if (blocksize < EXT4_MIN_BLOCK_SIZE || blocksize > EXT4_MAX_BLOCK_SIZE) { ext4_msg(sb, KERN_ERR, |