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Make inode64 a remountable option 

Actually, there is no reason about why a user must umount and mount a
XFS filesystem to enable 'inode64' option. So, this patch makes this a
remountable option.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Carlos Maiolino 2012-08-17 18:19:38 -03:00 committed by Ben Myers
parent 4026c9fde9
commit c3a58fecdd
1 changed files with 29 additions and 1 deletions
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30
fs/xfs/xfs_super.c
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@ -120,12 +120,13 @@ mempool_t *xfs_ioend_pool;
* in the future, too.
*/
enum {
Opt_barrier, Opt_nobarrier, Opt_err
Opt_barrier, Opt_nobarrier, Opt_inode64, Opt_err
};
static const match_table_t tokens = {
{Opt_barrier, "barrier"},
{Opt_nobarrier, "nobarrier"},
{Opt_inode64, "inode64"},
{Opt_err, NULL}
};
@ -1031,6 +1032,30 @@ xfs_restore_resvblks(struct xfs_mount *mp)
xfs_reserve_blocks(mp, &resblks, NULL);
}
STATIC void
xfs_set_inode64(struct xfs_mount *mp)
{
int i = 0;
for (i = 0; i < mp->m_sb.sb_agcount; i++) {
struct xfs_perag *pag;
pag = xfs_perag_get(mp, i);
pag->pagi_inodeok = 1;
pag->pagf_metadata = 0;
xfs_perag_put(pag);
}
/* There is no need for lock protection on m_flags,
* the rw_semaphore of the VFS superblock is locked
* during mount/umount/remount operations, so this is
* enough to avoid concurency on the m_flags field
*/
mp->m_flags &= ~(XFS_MOUNT_32BITINODES |
XFS_MOUNT_SMALL_INUMS);
mp->m_maxagi = i;
}
STATIC int
xfs_fs_remount(
struct super_block *sb,
@ -1056,6 +1081,9 @@ xfs_fs_remount(
case Opt_nobarrier:
mp->m_flags &= ~XFS_MOUNT_BARRIER;
break;
case Opt_inode64:
xfs_set_inode64(mp);
break;
default:
/*
* Logically we would return an error here to prevent