diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/ufs/ffs/ffs_vfsops.c | 60 |
1 files changed, 49 insertions, 11 deletions
diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c index fdf473f27e8..29bfbb20cf3 100644 --- a/sys/ufs/ffs/ffs_vfsops.c +++ b/sys/ufs/ffs/ffs_vfsops.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ffs_vfsops.c,v 1.78 2005/12/28 20:48:17 pedro Exp $ */ +/* $OpenBSD: ffs_vfsops.c,v 1.79 2006/01/03 12:20:54 pedro Exp $ */ /* $NetBSD: ffs_vfsops.c,v 1.19 1996/02/09 22:22:26 christos Exp $ */ /* @@ -606,6 +606,11 @@ ffs_reload(struct mount *mountp, struct ucred *cred, struct proc *p) } /* + * Possible locations for the super-block. + */ +const int sbtry[] = SBLOCKSEARCH; + +/* * Common code for mount and mountroot */ int @@ -617,6 +622,7 @@ ffs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p) dev_t dev; struct partinfo dpart; caddr_t space; + ufs2_daddr_t sbloc; int error, i, blks, size, ronly; int32_t *lp; size_t strsize; @@ -652,18 +658,50 @@ ffs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p) bp = NULL; ump = NULL; - error = bread(devvp, (daddr_t)(SBOFF / size), SBSIZE, cred, &bp); - if (error) - goto out; - fs = (struct fs *)bp->b_data; - if (fs->fs_magic != FS_UFS1_MAGIC || (u_int)fs->fs_bsize > MAXBSIZE || - fs->fs_bsize < sizeof(struct fs) || - (u_int)fs->fs_sbsize > SBSIZE) { - if (fs->fs_magic == FS_UFS2_MAGIC) - printf("no UFS2 support\n"); - error = EFTYPE; /* Inappropriate format */ + + /* + * Try reading the super-block in each of its possible locations. + */ + for (i = 0; sbtry[i] != -1; i++) { + if (bp != NULL) { + bp->b_flags |= B_NOCACHE; + brelse(bp); + bp = NULL; + } + + error = bread(devvp, sbtry[i] / size, SBSIZE, cred, &bp); + if (error) + goto out; + + fs = (struct fs *) bp->b_data; + sbloc = sbtry[i]; + + if (fs->fs_magic == FS_UFS2_MAGIC) { + printf("ffs_mountfs(): Sorry, no UFS2 support (yet)\n"); + error = EFTYPE; + goto out; + } + + /* + * Do not look for an FFS1 file system at SBLOCK_UFS2. Doing so + * will find the wrong super-block for file systems with 64k + * block size. + */ + if (fs->fs_magic == FS_UFS1_MAGIC && sbloc == SBLOCK_UFS2) + continue; + + if ((fs->fs_magic == FS_UFS1_MAGIC) && + ((u_int)fs->fs_bsize <= MAXBSIZE) && + ((u_int)fs->fs_bsize >= sizeof(struct fs)) && + ((u_int)fs->fs_sbsize <= SBSIZE)) + break; /* Validate super-block */ + } + + if (sbtry[i] == -1) { + error = EINVAL; goto out; } + fs->fs_fmod = 0; fs->fs_flags &= ~FS_UNCLEAN; if (fs->fs_clean == 0) { |