path: root/fs/ext2/super.c
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authorMaciej ┼╗enczykowski <zenczykowski@gmail.com>2010-09-26 12:38:28 +0000
committerJan Kara <jack@suse.cz>2011-01-06 11:52:14 +0100
commit31d710a7bd42f0d89e30d53bdaad427c5f191d0d (patch)
tree8f0d6e4786c8c0d58c39843a57119aef0015c55d /fs/ext2/super.c
parent3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5 (diff)
ext3: don't update sb journal_devnum when RO dev
An ext3 filesystem on a read-only device, with an external journal which is at a different device number then recorded in the superblock will fail to honor the read-only setting of the device and trigger a superblock update (write). For example: - ext3 on a software raid which is in read-only mode - external journal on a read-write device which has changed device num - attempt to mount with -o journal_dev=<new_number> - hits BUG_ON(mddev->ro = 1) in md.c Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Maciej ┼╗enczykowski <zenczykowski@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext2/super.c')
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