void
quot(char *name, char *mp)
{
int i, fd;
struct fs *fs;
get_inode(-1, NULL, 0); /* flush cache */
inituser();
initfsizes();
/*
* XXX this is completely broken. Of course you can't read a
* directory, well, not anymore. How to fix this, though...
*/
if ((fd = open(name, 0)) < 0) {
warn("%s", name);
return;
}
for (i = 0; sblock_try[i] != -1; i++) {
if (lseek(fd, sblock_try[i], 0) != sblock_try[i]) {
close(fd);
return;
}
if (read(fd, superblock, SBLOCKSIZE) != SBLOCKSIZE) {
close(fd);
return;
}
fs = (struct fs *)superblock;
if ((fs->fs_magic == FS_UFS1_MAGIC ||
(fs->fs_magic == FS_UFS2_MAGIC &&
fs->fs_sblockloc == sblock_try[i])) &&
fs->fs_bsize <= MAXBSIZE &&
fs->fs_bsize >= sizeof(struct fs))
break;
}
if (sblock_try[i] == -1) {
warnx("%s: not a BSD filesystem", name);
close(fd);
return;
}
ffs_oldfscompat(fs);
printf("%s:", name);
if (mp)
printf(" (%s)", mp);
putchar('\n');
(*func)(fd, fs, name);
close(fd);
}
/*
* Open a file.
*/
__compactcall int
ufs_open(const char *path, struct open_file *f)
{
#ifndef LIBSA_FS_SINGLECOMPONENT
const char *cp, *ncp;
int c;
#endif
ino32_t inumber;
struct file *fp;
struct fs *fs;
int rc;
#ifndef LIBSA_NO_FS_SYMLINK
ino32_t parent_inumber;
int nlinks = 0;
char namebuf[MAXPATHLEN+1];
char *buf;
#endif
/* allocate file system specific data structure */
fp = alloc(sizeof(struct file));
memset(fp, 0, sizeof(struct file));
f->f_fsdata = (void *)fp;
/* allocate space and read super block */
fs = alloc(SBLOCKSIZE);
fp->f_fs = fs;
twiddle();
#ifdef LIBSA_FFSv2
rc = ffs_find_superblock(f, fs);
if (rc)
goto out;
#else
{
size_t buf_size;
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
SBLOCKOFFSET / DEV_BSIZE, SBLOCKSIZE, fs, &buf_size);
if (rc)
goto out;
if (buf_size != SBLOCKSIZE ||
#ifdef LIBSA_FFS
fs->lfs_version != REQUIRED_LFS_VERSION ||
#endif
fs->fs_magic != FS_MAGIC) {
rc = EINVAL;
goto out;
}
}
#if defined(LIBSA_LFS) && REQUIRED_LFS_VERSION == 2
/*
* XXX We should check the second superblock and use the eldest
* of the two. See comments near the top of lfs_mountfs()
* in sys/ufs/lfs/lfs_vfsops.c.
* This may need a LIBSA_LFS_SMALL check as well.
*/
#endif
#endif
#ifdef LIBSA_FFSv1
ffs_oldfscompat(fs);
#endif
if (fs->fs_bsize > MAXBSIZE ||
(size_t)fs->fs_bsize < sizeof(struct fs)) {
rc = EINVAL;
goto out;
}
/*
* Calculate indirect block levels.
*/
{
indp_t mult;
int ln2;
/*
* We note that the number of indirect blocks is always
* a power of 2. This lets us use shifts and masks instead
* of divide and remainder and avoinds pulling in the
* 64bit division routine into the boot code.
*/
mult = UFS_NINDIR(fs);
#ifdef DEBUG
if (mult & (mult - 1)) {
/* Hummm was't a power of 2 */
rc = EINVAL;
goto out;
}
#endif
for (ln2 = 0; mult != 1; ln2++)
mult >>= 1;
fp->f_nishift = ln2;
}
/* alloc a block sized buffer used for all fs transfers */
fp->f_buf = alloc(fs->fs_bsize);
inumber = UFS_ROOTINO;
if ((rc = read_inode(inumber, f)) != 0)
goto out;
#ifndef LIBSA_FS_SINGLECOMPONENT
cp = path;
while (*cp) {
/*
* Remove extra separators
*/
while (*cp == '/')
cp++;
if (*cp == '\0')
break;
/*
* Check that current node is a directory.
*/
if ((fp->f_di.di_mode & IFMT) != IFDIR) {
rc = ENOTDIR;
goto out;
}
/*
* Get next component of path name.
*/
ncp = cp;
while ((c = *cp) != '\0' && c != '/')
cp++;
/*
* Look up component in current directory.
* Save directory inumber in case we find a
* symbolic link.
*/
#ifndef LIBSA_NO_FS_SYMLINK
parent_inumber = inumber;
#endif
rc = search_directory(ncp, cp - ncp, f, &inumber);
if (rc)
goto out;
/*
* Open next component.
*/
if ((rc = read_inode(inumber, f)) != 0)
goto out;
#ifndef LIBSA_NO_FS_SYMLINK
/*
* Check for symbolic link.
*/
if ((fp->f_di.di_mode & IFMT) == IFLNK) {
int link_len = fp->f_di.di_size;
int len;
len = strlen(cp);
if (link_len + len > MAXPATHLEN ||
++nlinks > MAXSYMLINKS) {
rc = ENOENT;
goto out;
}
memmove(&namebuf[link_len], cp, len + 1);
if (link_len < fs->fs_maxsymlinklen) {
memcpy(namebuf, fp->f_di.di_db, link_len);
} else {
/*
* Read file for symbolic link
*/
size_t buf_size;
indp_t disk_block;
buf = fp->f_buf;
rc = block_map(f, (indp_t)0, &disk_block);
if (rc)
goto out;
twiddle();
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata,
F_READ, FSBTODB(fs, disk_block),
fs->fs_bsize, buf, &buf_size);
if (rc)
goto out;
memcpy(namebuf, buf, link_len);
}
/*
* If relative pathname, restart at parent directory.
* If absolute pathname, restart at root.
*/
cp = namebuf;
if (*cp != '/')
inumber = parent_inumber;
else
inumber = (ino32_t)UFS_ROOTINO;
if ((rc = read_inode(inumber, f)) != 0)
goto out;
}
#endif /* !LIBSA_NO_FS_SYMLINK */
}
/*
* Found terminal component.
*/
rc = 0;
#else /* !LIBSA_FS_SINGLECOMPONENT */
/* look up component in the current (root) directory */
rc = search_directory(path, strlen(path), f, &inumber);
if (rc)
goto out;
/* open it */
rc = read_inode(inumber, f);
#endif /* !LIBSA_FS_SINGLECOMPONENT */
fp->f_seekp = 0; /* reset seek pointer */
out:
if (rc)
ufs_close(f);
#ifdef FSMOD /* Only defined for lfs */
else
fsmod = FSMOD;
#endif
return rc;
}
/*
* Reload all incore data for a filesystem (used after running fsck on
* the root filesystem and finding things to fix). The filesystem must
* be mounted read-only.
*
* Things to do to update the mount:
* 1) invalidate all cached meta-data.
* 2) re-read superblock from disk.
* 3) re-read summary information from disk.
* 4) invalidate all inactive vnodes.
* 5) invalidate all cached file data.
* 6) re-read inode data for all active vnodes.
*/
int
ffs_reload(struct mount *mountp, struct ucred *cred, struct proc *p)
{
struct vnode *devvp;
caddr_t space;
struct fs *fs, *newfs;
struct partinfo dpart;
int i, blks, size, error;
int32_t *lp;
struct buf *bp = NULL;
struct ffs_reload_args fra;
if ((mountp->mnt_flag & MNT_RDONLY) == 0)
return (EINVAL);
/*
* Step 1: invalidate all cached meta-data.
*/
devvp = VFSTOUFS(mountp)->um_devvp;
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
error = vinvalbuf(devvp, 0, cred, p, 0, 0);
VOP_UNLOCK(devvp, 0, p);
if (error)
panic("ffs_reload: dirty1");
/*
* Step 2: re-read superblock from disk.
*/
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
size = DEV_BSIZE;
else
size = dpart.disklab->d_secsize;
error = bread(devvp, (daddr_t)(SBOFF / size), SBSIZE, NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
newfs = (struct fs *)bp->b_data;
if (ffs_validate(newfs) == 0) {
brelse(bp);
return (EINVAL);
}
fs = VFSTOUFS(mountp)->um_fs;
/*
* Copy pointer fields back into superblock before copying in XXX
* new superblock. These should really be in the ufsmount. XXX
* Note that important parameters (eg fs_ncg) are unchanged.
*/
newfs->fs_csp = fs->fs_csp;
newfs->fs_maxcluster = fs->fs_maxcluster;
newfs->fs_ronly = fs->fs_ronly;
bcopy(newfs, fs, (u_int)fs->fs_sbsize);
if (fs->fs_sbsize < SBSIZE)
bp->b_flags |= B_INVAL;
brelse(bp);
mountp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
ffs1_compat_read(fs, VFSTOUFS(mountp), SBOFF);
ffs_oldfscompat(fs);
(void)ffs_statfs(mountp, &mountp->mnt_stat, p);
/*
* Step 3: re-read summary information from disk.
*/
blks = howmany(fs->fs_cssize, fs->fs_fsize);
space = (caddr_t)fs->fs_csp;
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;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
bcopy(bp->b_data, space, (u_int)size);
space += size;
brelse(bp);
}
if ((fs->fs_flags & FS_DOSOFTDEP))
(void) softdep_mount(devvp, mountp, fs, cred);
/*
* We no longer know anything about clusters per cylinder group.
*/
if (fs->fs_contigsumsize > 0) {
lp = fs->fs_maxcluster;
for (i = 0; i < fs->fs_ncg; i++)
*lp++ = fs->fs_contigsumsize;
}
fra.p = p;
fra.cred = cred;
fra.fs = fs;
fra.devvp = devvp;
error = vfs_mount_foreach_vnode(mountp, ffs_reload_vnode, &fra);
return (error);
}
/*
* Common code for mount and mountroot
*/
int
ffs_mountfs(struct vnode *devvp, struct mount *mp, struct proc *p)
{
struct ufsmount *ump;
struct buf *bp;
struct fs *fs;
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;
struct ucred *cred;
u_int64_t maxfilesize; /* XXX */
dev = devvp->v_rdev;
cred = p ? p->p_ucred : NOCRED;
/*
* Disallow multiple mounts of the same device.
* Disallow mounting of a device that is currently in use
* (except for root, which might share swap device for miniroot).
* Flush out any old buffers remaining from a previous use.
*/
if ((error = vfs_mountedon(devvp)) != 0)
return (error);
if (vcount(devvp) > 1 && devvp != rootvp)
return (EBUSY);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0);
VOP_UNLOCK(devvp, 0, p);
if (error)
return (error);
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
if (error)
return (error);
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, cred, p) != 0)
size = DEV_BSIZE;
else
size = dpart.disklab->d_secsize;
bp = NULL;
ump = NULL;
/*
* 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 0
if (fs->fs_magic == FS_UFS2_MAGIC) {
printf("ffs_mountfs(): Sorry, no UFS2 support (yet)\n");
error = EFTYPE;
goto out;
}
#endif
/*
* 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 (ffs_validate(fs))
break; /* Super block validated */
}
if (sbtry[i] == -1) {
error = EINVAL;
goto out;
}
fs->fs_fmod = 0;
fs->fs_flags &= ~FS_UNCLEAN;
if (fs->fs_clean == 0) {
fs->fs_flags |= FS_UNCLEAN;
#if 0
/*
* It is safe mount unclean file system
* if it was previously mounted with softdep
* but we may loss space and must
* sometimes run fsck manually.
*/
if (fs->fs_flags & FS_DOSOFTDEP)
printf(
"WARNING: %s was not properly unmounted\n",
fs->fs_fsmnt);
else
#endif
if (ronly || (mp->mnt_flag & MNT_FORCE)) {
printf(
"WARNING: %s was not properly unmounted\n",
fs->fs_fsmnt);
} else {
printf(
"WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
fs->fs_fsmnt);
error = EROFS;
goto out;
}
}
if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
#ifndef SMALL_KERNEL
printf("ffs_mountfs(): obsolete rotational table format, "
"please use fsck_ffs(8) -c 1\n");
#endif
error = EFTYPE;
goto out;
}
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
bzero(ump, sizeof *ump);
ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
M_WAITOK);
if (fs->fs_magic == FS_UFS1_MAGIC)
ump->um_fstype = UM_UFS1;
#ifdef FFS2
else
ump->um_fstype = UM_UFS2;
#endif
bcopy(bp->b_data, 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;
ffs1_compat_read(fs, ump, sbloc);
fs->fs_ronly = ronly;
size = fs->fs_cssize;
blks = howmany(size, fs->fs_fsize);
if (fs->fs_contigsumsize > 0)
size += fs->fs_ncg * sizeof(int32_t);
space = malloc((u_long)size, M_UFSMNT, M_WAITOK);
fs->fs_csp = (struct csum *)space;
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;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
cred, &bp);
if (error) {
free(fs->fs_csp, M_UFSMNT);
goto out;
}
bcopy(bp->b_data, space, (u_int)size);
space += size;
brelse(bp);
bp = NULL;
}
if (fs->fs_contigsumsize > 0) {
fs->fs_maxcluster = lp = (int32_t *)space;
for (i = 0; i < fs->fs_ncg; i++)
*lp++ = fs->fs_contigsumsize;
}
mp->mnt_data = (qaddr_t)ump;
mp->mnt_stat.f_fsid.val[0] = (long)dev;
/* Use on-disk fsid if it exists, else fake it */
if (fs->fs_id[0] != 0 && fs->fs_id[1] != 0)
mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
else
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
mp->mnt_flag |= MNT_LOCAL;
ump->um_mountp = mp;
ump->um_dev = dev;
ump->um_devvp = devvp;
ump->um_nindir = fs->fs_nindir;
ump->um_bptrtodb = fs->fs_fsbtodb;
ump->um_seqinc = fs->fs_frag;
for (i = 0; i < MAXQUOTAS; i++)
ump->um_quotas[i] = NULLVP;
devvp->v_specmountpoint = mp;
ffs_oldfscompat(fs);
if (ronly)
fs->fs_contigdirs = NULL;
else {
fs->fs_contigdirs = (u_int8_t*)malloc((u_long)fs->fs_ncg,
M_UFSMNT, M_WAITOK);
bzero(fs->fs_contigdirs, fs->fs_ncg);
}
/*
* Set FS local "last mounted on" information (NULL pad)
*/
copystr(mp->mnt_stat.f_mntonname, /* mount point*/
fs->fs_fsmnt, /* copy area*/
sizeof(fs->fs_fsmnt) - 1, /* max size*/
&strsize); /* real size*/
bzero(fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize);
#if 0
if( mp->mnt_flag & MNT_ROOTFS) {
/*
* Root mount; update timestamp in mount structure.
* this will be used by the common root mount code
* to update the system clock.
*/
mp->mnt_time = fs->fs_time;
}
#endif
/*
* XXX
* Limit max file size. Even though ffs can handle files up to 16TB,
* we do limit the max file to 2^31 pages to prevent overflow of
* a 32-bit unsigned int. The buffer cache has its own checks but
* a little added paranoia never hurts.
*/
ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */
maxfilesize = (u_int64_t)0x80000000 * MIN(PAGE_SIZE, fs->fs_bsize) - 1;
if (fs->fs_maxfilesize > maxfilesize) /* XXX */
fs->fs_maxfilesize = maxfilesize; /* XXX */
if (ronly == 0) {
if ((fs->fs_flags & FS_DOSOFTDEP) &&
(error = softdep_mount(devvp, mp, fs, cred)) != 0) {
free(fs->fs_csp, M_UFSMNT);
free(fs->fs_contigdirs, M_UFSMNT);
goto out;
}
fs->fs_fmod = 1;
fs->fs_clean = 0;
if (mp->mnt_flag & MNT_SOFTDEP)
fs->fs_flags |= FS_DOSOFTDEP;
else
fs->fs_flags &= ~FS_DOSOFTDEP;
(void) ffs_sbupdate(ump, MNT_WAIT);
}
return (0);
out:
devvp->v_specmountpoint = NULL;
if (bp)
brelse(bp);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p);
VOP_UNLOCK(devvp, 0, p);
if (ump) {
free(ump->um_fs, M_UFSMNT);
free(ump, M_UFSMNT);
mp->mnt_data = (qaddr_t)0;
}
return (error);
}
/*
* Open a file.
*/
static int
ufs_open(const char *upath, struct open_file *f)
{
char *cp, *ncp;
int c;
ino_t inumber, parent_inumber;
struct file *fp;
struct fs *fs;
int rc;
size_t buf_size;
int nlinks = 0;
char namebuf[MAXPATHLEN+1];
char *buf = NULL;
char *path = NULL;
/* allocate file system specific data structure */
fp = malloc(sizeof(struct file));
bzero(fp, sizeof(struct file));
f->f_fsdata = (void *)fp;
/* allocate space and read super block */
fs = malloc(SBSIZE);
fp->f_fs = fs;
twiddle();
rc = (f->f_dev->dv_strategy)(f->f_devdata, F_READ,
SBOFF / DEV_BSIZE, SBSIZE, (char *)fs, &buf_size);
if (rc)
goto out;
if (buf_size != SBSIZE || fs->fs_magic != FS_MAGIC ||
fs->fs_bsize > MAXBSIZE || fs->fs_bsize < sizeof(struct fs)) {
rc = EINVAL;
goto out;
}
#ifdef COMPAT_UFS
ffs_oldfscompat(fs);
#endif
/*
* Calculate indirect block levels.
*/
{
int omult;
int mult;
int level;
omult = 0;
mult = 1;
for (level = 0; level < NIADDR; level++) {
mult *= NINDIR(fs);
if (mult < omult)
mult = 0x7FFFFFFF;
fp->f_nindir[level] = mult;
omult = mult;
}
}
inumber = ROOTINO;
if ((rc = read_inode(inumber, f)) != 0)
goto out;
cp = path = strdup(upath);
if (path == NULL) {
rc = ENOMEM;
goto out;
}
while (*cp) {
/*
* Remove extra separators
*/
while (*cp == '/')
cp++;
if (*cp == '\0')
break;
/*
* Check that current node is a directory.
*/
if ((fp->f_di.di_mode & IFMT) != IFDIR) {
rc = ENOTDIR;
goto out;
}
/*
* Get next component of path name.
*/
{
int len = 0;
ncp = cp;
while ((c = *cp) != '\0' && c != '/') {
if (++len > MAXNAMLEN) {
rc = ENOENT;
goto out;
}
cp++;
}
*cp = '\0';
}
/*
* Look up component in current directory.
* Save directory inumber in case we find a
* symbolic link.
*/
parent_inumber = inumber;
rc = search_directory(ncp, f, &inumber);
*cp = c;
if (rc)
goto out;
/*
* Open next component.
*/
if ((rc = read_inode(inumber, f)) != 0)
goto out;
/*
* Check for symbolic link.
*/
if ((fp->f_di.di_mode & IFMT) == IFLNK) {
int link_len = fp->f_di.di_size;
int len;
len = strlen(cp);
if (link_len + len > MAXPATHLEN ||
++nlinks > MAXSYMLINKS) {
rc = ENOENT;
goto out;
}
bcopy(cp, &namebuf[link_len], len + 1);
if (link_len < fs->fs_maxsymlinklen) {
bcopy(fp->f_di.di_shortlink, namebuf,
(unsigned) link_len);
} else {
/*
* Read file for symbolic link
*/
size_t buf_size;
daddr_t disk_block;
struct fs *fs = fp->f_fs;
if (!buf)
buf = malloc(fs->fs_bsize);
rc = block_map(f, (daddr_t)0, &disk_block);
if (rc)
goto out;
twiddle();
rc = (f->f_dev->dv_strategy)(f->f_devdata,
F_READ, fsbtodb(fs, disk_block),
fs->fs_bsize, buf, &buf_size);
if (rc)
goto out;
bcopy((char *)buf, namebuf, (unsigned)link_len);
}
/*
* If relative pathname, restart at parent directory.
* If absolute pathname, restart at root.
*/
cp = namebuf;
if (*cp != '/')
inumber = parent_inumber;
else
inumber = (ino_t)ROOTINO;
if ((rc = read_inode(inumber, f)) != 0)
goto out;
}
}
/*
* Found terminal component.
*/
fp->f_seekp = 0;
rc = 0;
out:
if (buf)
free(buf);
if (path)
free(path);
if (rc) {
f->f_fsdata = NULL;
if (fp->f_buf)
free(fp->f_buf);
free(fp->f_fs);
free(fp);
}
return (rc);
}
