-/*
- * Called by vfs_mountroot when ufs is going to be mounted as root.
- *
- * Name is updated by mount(8) after booting.
- */
-#define ROOTNAME "root_device"
-
-ufs_mountroot()
-{
- register struct mount *mp;
- extern struct vnode *rootvp;
- struct proc *p = curproc; /* XXX */
- struct ufsmount *ump;
- register struct fs *fs;
- u_int size;
- int error;
-
- mp = (struct mount *)malloc((u_long)sizeof(struct mount),
- M_MOUNT, M_WAITOK);
- mp->mnt_op = &ufs_vfsops;
- mp->mnt_flag = MNT_RDONLY;
- mp->mnt_exroot = 0;
- mp->mnt_mounth = NULLVP;
- error = mountfs(rootvp, mp, p);
- if (error) {
- free((caddr_t)mp, M_MOUNT);
- return (error);
- }
- if (error = vfs_lock(mp)) {
- (void)ufs_unmount(mp, 0, p);
- free((caddr_t)mp, M_MOUNT);
- return (error);
- }
- rootfs = mp;
- mp->mnt_next = mp;
- mp->mnt_prev = mp;
- mp->mnt_vnodecovered = NULLVP;
- ump = VFSTOUFS(mp);
- fs = ump->um_fs;
- bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
- fs->fs_fsmnt[0] = '/';
- bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
- MNAMELEN);
- (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
- &size);
- bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
- (void) ufs_statfs(mp, &mp->mnt_stat, p);
- vfs_unlock(mp);
- inittodr(fs->fs_time);
- return (0);
-}
-
-/*
- * VFS Operations.
- *
- * mount system call
- */
-ufs_mount(mp, path, data, ndp, p)
- register struct mount *mp;
- char *path;
- caddr_t data;
- struct nameidata *ndp;
- struct proc *p;
-{
- struct vnode *devvp;
- struct ufs_args args;
- struct ufsmount *ump;
- register struct fs *fs;
- u_int size;
- int error;
-
- if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
- return (error);
- /*
- * Process export requests.
- */
- if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) {
- if (args.exflags & MNT_EXPORTED)
- mp->mnt_flag |= MNT_EXPORTED;
- else
- mp->mnt_flag &= ~MNT_EXPORTED;
- if (args.exflags & MNT_EXRDONLY)
- mp->mnt_flag |= MNT_EXRDONLY;
- else
- mp->mnt_flag &= ~MNT_EXRDONLY;
- mp->mnt_exroot = args.exroot;
- }
- if ((mp->mnt_flag & MNT_UPDATE) == 0) {
- if ((error = getmdev(&devvp, args.fspec, ndp, p)) != 0)
- return (error);
- error = mountfs(devvp, mp, p);
- } else {
- ump = VFSTOUFS(mp);
- fs = ump->um_fs;
- if (fs->fs_ronly && (mp->mnt_flag & MNT_RDONLY) == 0)
- fs->fs_ronly = 0;
- /*
- * Verify that the specified device is the one that
- * is really being used for the root file system.
- */
- if (args.fspec == 0)
- return (0);
- if ((error = getmdev(&devvp, args.fspec, ndp, p)) != 0)
- return (error);
- if (devvp != ump->um_devvp)
- error = EINVAL; /* needs translation */
- else
- vrele(devvp);
- }
- if (error) {
- vrele(devvp);
- return (error);
- }
- ump = VFSTOUFS(mp);
- fs = ump->um_fs;
- (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
- bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
- bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
- MNAMELEN);
- (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
- &size);
- bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
- (void) ufs_statfs(mp, &mp->mnt_stat, p);
- return (0);
-}
-
-/*
- * Common code for mount and mountroot
- */
-mountfs(devvp, mp, p)
- register struct vnode *devvp;
- struct mount *mp;
- struct proc *p;
-{
- register struct ufsmount *ump = (struct ufsmount *)0;
- struct buf *bp = NULL;
- register struct fs *fs;
- dev_t dev = devvp->v_rdev;
- struct partinfo dpart;
- int havepart = 0, blks;
- caddr_t base, space;
- int havepart = 0, blks;
- int error, i, size;
- int needclose = 0;
- int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
- extern struct vnode *rootvp;
-
- if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p))
- return (error);
- needclose = 1;
- if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
- size = DEV_BSIZE;
- else {
- havepart = 1;
- size = dpart.disklab->d_secsize;
- }
- if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp))
- goto out;
- fs = bp->b_un.b_fs;
- error = EINVAL; /* XXX needs translation */
- goto out;
- }
- ump = (struct ufsmount *)malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
- ump->um_fs = (struct fs *)malloc((u_long)fs->fs_sbsize, M_SUPERBLK,
- M_WAITOK);
- bcopy((caddr_t)bp->b_un.b_addr, (caddr_t)ump->um_fs,
- (u_int)fs->fs_sbsize);
- if (fs->fs_sbsize < SBSIZE)
- bp->b_flags |= B_INVAL;
- brelse(bp);
- bp = NULL;
- fs = ump->um_fs;
- fs->fs_ronly = ronly;
- if (ronly == 0)
- fs->fs_fmod = 1;
- if (havepart) {
- dpart.part->p_fstype = FS_BSDFFS;
- dpart.part->p_fsize = fs->fs_fsize;
- dpart.part->p_frag = fs->fs_frag;
- dpart.part->p_cpg = fs->fs_cpg;
- }
-#ifdef SECSIZE
- /*
- * If we have a disk label, force per-partition
- * filesystem information to be correct
- * and set correct current fsbtodb shift.
- */
-#endif SECSIZE
- if (havepart) {
- dpart.part->p_fstype = FS_BSDFFS;
- dpart.part->p_fsize = fs->fs_fsize;
- dpart.part->p_frag = fs->fs_frag;
-#ifdef SECSIZE
-#ifdef tahoe
- /*
- * Save the original fsbtodb shift to restore on updates.
- * (Console doesn't understand fsbtodb changes.)
- */
- fs->fs_sparecon[0] = fs->fs_fsbtodb;
-#endif
- i = fs->fs_fsize / size;
- for (fs->fs_fsbtodb = 0; i > 1; i >>= 1)
- fs->fs_fsbtodb++;
-#endif SECSIZE
- fs->fs_dbsize = size;
- }
- blks = howmany(fs->fs_cssize, fs->fs_fsize);
- base = space = (caddr_t)malloc((u_long)fs->fs_cssize, M_SUPERBLK,
- M_WAITOK);
- for (i = 0; i < blks; i += fs->fs_frag) {
- size = fs->fs_bsize;
- if (i + fs->fs_frag > blks)
- size = (blks - i) * fs->fs_fsize;
-#ifdef SECSIZE
- tp = bread(dev, fsbtodb(fs, fs->fs_csaddr + i), size,
- fs->fs_dbsize);
-#else SECSIZE
- error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
- NOCRED, &bp);
- if (error) {
- free((caddr_t)base, M_SUPERBLK);
- goto out;
- }
- bcopy((caddr_t)bp->b_un.b_addr, space, (u_int)size);
- fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space;
- space += size;
- brelse(bp);
- bp = NULL;
- }
- mp->mnt_data = (qaddr_t)ump;
- mp->mnt_stat.f_fsid.val[0] = (long)dev;
- mp->mnt_stat.f_fsid.val[1] = MOUNT_UFS;
- mp->mnt_flag |= MNT_LOCAL;
- ump->um_mountp = mp;
- ump->um_dev = dev;
- ump->um_devvp = devvp;
- for (i = 0; i < MAXQUOTAS; i++)
- ump->um_quotas[i] = NULLVP;
- devvp->v_specflags |= SI_MOUNTEDON;
-
- /* Sanity checks for old file systems. XXX */
- fs->fs_npsect = MAX(fs->fs_npsect, fs->fs_nsect); /* XXX */
- fs->fs_interleave = MAX(fs->fs_interleave, 1); /* XXX */
- if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
- fs->fs_nrpos = 8; /* XXX */
-
- return (0);
-out:
- if (bp)
- brelse(bp);
- if (needclose)
- (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
- if (ump) {
- free((caddr_t)ump->um_fs, M_SUPERBLK);
- free((caddr_t)ump, M_UFSMNT);
- mp->mnt_data = (qaddr_t)0;
- }
- return (error);
-}
-
projects / unix-history / blobdiff