コード例 #1
0
ファイル: ext2fs_vfsops.c プロジェクト: ryo/netbsd-src
/*
 * Sanity check the disk vnode content, and copy it over to inode structure.
 */
static int
ext2fs_loadvnode_content(struct m_ext2fs *fs, ino_t ino, struct buf *bp, struct inode *ip)
{
	struct ext2fs_dinode *din;
	int error = 0;

	din = (struct ext2fs_dinode *)((char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs)));

	/* sanity checks - inode data NOT byteswapped at this point */
	if (EXT2_DINODE_FITS(din, e2di_extra_isize, EXT2_DINODE_SIZE(fs))
	    && (EXT2_DINODE_SIZE(fs) - EXT2_REV0_DINODE_SIZE) < fs2h16(din->e2di_extra_isize))
	{
		printf("ext2fs: inode %"PRIu64" bad extra_isize %u",
			ino, din->e2di_extra_isize);
		error = EINVAL;
		goto bad;
	}

	/* everything allright, proceed with copy */
	if (ip->i_din.e2fs_din == NULL)
		ip->i_din.e2fs_din = kmem_alloc(EXT2_DINODE_SIZE(fs), KM_SLEEP);

	e2fs_iload(din, ip->i_din.e2fs_din, EXT2_DINODE_SIZE(fs));

	ext2fs_set_inode_guid(ip);

    bad:
	return error;
}
コード例 #2
0
ファイル: ext2fs_vfsops.c プロジェクト: Hooman3/minix
/*
 * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it
 * in from disk.  If it is in core, wait for the lock bit to clear, then
 * return the inode locked.  Detection and handling of mount points must be
 * done by the calling routine.
 */
int
ext2fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
{
	struct m_ext2fs *fs;
	struct inode *ip;
	struct ufsmount *ump;
	struct buf *bp;
	struct vnode *vp;
	dev_t dev;
	int error;
	void *cp;

	ump = VFSTOUFS(mp);
	dev = ump->um_dev;
retry:
	if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL)
		return (0);

	/* Allocate a new vnode/inode. */
	error = getnewvnode(VT_EXT2FS, mp, ext2fs_vnodeop_p, NULL, &vp);
	if (error) {
		*vpp = NULL;
		return (error);
	}
	ip = pool_get(&ext2fs_inode_pool, PR_WAITOK);

	mutex_enter(&ufs_hashlock);
	if ((*vpp = ufs_ihashget(dev, ino, 0)) != NULL) {
		mutex_exit(&ufs_hashlock);
		ungetnewvnode(vp);
		pool_put(&ext2fs_inode_pool, ip);
		goto retry;
	}

	vp->v_vflag |= VV_LOCKSWORK;

	memset(ip, 0, sizeof(struct inode));
	vp->v_data = ip;
	ip->i_vnode = vp;
	ip->i_ump = ump;
	ip->i_e2fs = fs = ump->um_e2fs;
	ip->i_dev = dev;
	ip->i_number = ino;
	ip->i_e2fs_last_lblk = 0;
	ip->i_e2fs_last_blk = 0;
	genfs_node_init(vp, &ext2fs_genfsops);

	/*
	 * Put it onto its hash chain and lock it so that other requests for
	 * this inode will block if they arrive while we are sleeping waiting
	 * for old data structures to be purged or for the contents of the
	 * disk portion of this inode to be read.
	 */

	ufs_ihashins(ip);
	mutex_exit(&ufs_hashlock);

	/* Read in the disk contents for the inode, copy into the inode. */
	error = bread(ump->um_devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ino)),
	    (int)fs->e2fs_bsize, NOCRED, 0, &bp);
	if (error) {

		/*
		 * The inode does not contain anything useful, so it would
		 * be misleading to leave it on its hash chain. With mode
		 * still zero, it will be unlinked and returned to the free
		 * list by vput().
		 */

		vput(vp);
		*vpp = NULL;
		return (error);
	}
	cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs));
	ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK);
	e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din);
	ext2fs_set_inode_guid(ip);
	brelse(bp, 0);

	/* If the inode was deleted, reset all fields */
	if (ip->i_e2fs_dtime != 0) {
		ip->i_e2fs_mode = 0;
		(void)ext2fs_setsize(ip, 0);
		(void)ext2fs_setnblock(ip, 0);
		memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks));
	}

	/*
	 * Initialize the vnode from the inode, check for aliases.
	 */

	error = ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp);
	if (error) {
		vput(vp);
		*vpp = NULL;
		return (error);
	}
	/*
	 * Finish inode initialization now that aliasing has been resolved.
	 */

	ip->i_devvp = ump->um_devvp;
	vref(ip->i_devvp);

	/*
	 * Set up a generation number for this inode if it does not
	 * already have one. This should only happen on old filesystems.
	 */

	if (ip->i_e2fs_gen == 0) {
		if (++ext2gennumber < (u_long)time_second)
			ext2gennumber = time_second;
		ip->i_e2fs_gen = ext2gennumber;
		if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
			ip->i_flag |= IN_MODIFIED;
	}
	uvm_vnp_setsize(vp, ext2fs_size(ip));
	*vpp = vp;
	return (0);
}
コード例 #3
0
/*
 * Read an inode from disk and initialize this vnode / inode pair.
 * Caller assures no other thread will try to load this inode.
 */
int
ext2fs_loadvnode(struct mount *mp, struct vnode *vp,
    const void *key, size_t key_len, const void **new_key)
{
	ino_t ino;
	struct m_ext2fs *fs;
	struct inode *ip;
	struct ufsmount *ump;
	struct buf *bp;
	dev_t dev;
	int error;
	void *cp;

	KASSERT(key_len == sizeof(ino));
	memcpy(&ino, key, key_len);
	ump = VFSTOUFS(mp);
	dev = ump->um_dev;
	fs = ump->um_e2fs;

	/* Read in the disk contents for the inode, copy into the inode. */
	error = bread(ump->um_devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ino)),
	    (int)fs->e2fs_bsize, 0, &bp);
	if (error)
		return error;

	/* Allocate and initialize inode. */
	ip = pool_get(&ext2fs_inode_pool, PR_WAITOK);
	memset(ip, 0, sizeof(struct inode));
	vp->v_tag = VT_EXT2FS;
	vp->v_op = ext2fs_vnodeop_p;
	vp->v_vflag |= VV_LOCKSWORK;
	vp->v_data = ip;
	ip->i_vnode = vp;
	ip->i_ump = ump;
	ip->i_e2fs = fs;
	ip->i_dev = dev;
	ip->i_number = ino;
	ip->i_e2fs_last_lblk = 0;
	ip->i_e2fs_last_blk = 0;

	/* Initialize genfs node. */
	genfs_node_init(vp, &ext2fs_genfsops);

	cp = (char *)bp->b_data + (ino_to_fsbo(fs, ino) * EXT2_DINODE_SIZE(fs));
	ip->i_din.e2fs_din = pool_get(&ext2fs_dinode_pool, PR_WAITOK);
	e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din);
	ext2fs_set_inode_guid(ip);
	brelse(bp, 0);

	/* If the inode was deleted, reset all fields */
	if (ip->i_e2fs_dtime != 0) {
		ip->i_e2fs_mode = 0;
		(void)ext2fs_setsize(ip, 0);
		(void)ext2fs_setnblock(ip, 0);
		memset(ip->i_e2fs_blocks, 0, sizeof(ip->i_e2fs_blocks));
	}

	/* Initialize the vnode from the inode. */
	ext2fs_vinit(mp, ext2fs_specop_p, ext2fs_fifoop_p, &vp);

	/* Finish inode initialization. */
	ip->i_devvp = ump->um_devvp;
	vref(ip->i_devvp);

	/*
	 * Set up a generation number for this inode if it does not
	 * already have one. This should only happen on old filesystems.
	 */

	if (ip->i_e2fs_gen == 0) {
		if (++ext2gennumber < (u_long)time_second)
			ext2gennumber = time_second;
		ip->i_e2fs_gen = ext2gennumber;
		if ((mp->mnt_flag & MNT_RDONLY) == 0)
			ip->i_flag |= IN_MODIFIED;
	}
	uvm_vnp_setsize(vp, ext2fs_size(ip));
	*new_key = &ip->i_number;
	return 0;
}
コード例 #4
0
ファイル: ext2fs_vfsops.c プロジェクト: Hooman3/minix
/*
 * 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
ext2fs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l)
{
	struct vnode *vp, *mvp, *devvp;
	struct inode *ip;
	struct buf *bp;
	struct m_ext2fs *fs;
	struct ext2fs *newfs;
	int i, error;
	void *cp;
	struct ufsmount *ump;

	if ((mp->mnt_flag & MNT_RDONLY) == 0)
		return (EINVAL);

	ump = VFSTOUFS(mp);
	/*
	 * Step 1: invalidate all cached meta-data.
	 */
	devvp = ump->um_devvp;
	vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
	error = vinvalbuf(devvp, 0, cred, l, 0, 0);
	VOP_UNLOCK(devvp);
	if (error)
		panic("ext2fs_reload: dirty1");
	/*
	 * Step 2: re-read superblock from disk.
	 */
	error = bread(devvp, SBLOCK, SBSIZE, NOCRED, 0, &bp);
	if (error) {
		return (error);
	}
	newfs = (struct ext2fs *)bp->b_data;
	error = ext2fs_checksb(newfs, (mp->mnt_flag & MNT_RDONLY) != 0);
	if (error) {
		brelse(bp, 0);
		return (error);
	}

	fs = ump->um_e2fs;
	/*
	 * copy in new superblock, and compute in-memory values
	 */
	e2fs_sbload(newfs, &fs->e2fs);
	fs->e2fs_ncg =
	    howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock,
	    fs->e2fs.e2fs_bpg);
	fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + LOG_MINBSIZE - DEV_BSHIFT;
	fs->e2fs_bsize = MINBSIZE << fs->e2fs.e2fs_log_bsize;
	fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize;
	fs->e2fs_qbmask = fs->e2fs_bsize - 1;
	fs->e2fs_bmask = ~fs->e2fs_qbmask;
	fs->e2fs_ngdb =
	    howmany(fs->e2fs_ncg, fs->e2fs_bsize / sizeof(struct ext2_gd));
	fs->e2fs_ipb = fs->e2fs_bsize / EXT2_DINODE_SIZE(fs);
	fs->e2fs_itpg = fs->e2fs.e2fs_ipg / fs->e2fs_ipb;
	brelse(bp, 0);

	/*
	 * Step 3: re-read summary information from disk.
	 */

	for (i = 0; i < fs->e2fs_ngdb; i++) {
		error = bread(devvp ,
		    EXT2_FSBTODB(fs, fs->e2fs.e2fs_first_dblock +
		    1 /* superblock */ + i),
		    fs->e2fs_bsize, NOCRED, 0, &bp);
		if (error) {
			return (error);
		}
		e2fs_cgload((struct ext2_gd *)bp->b_data,
		    &fs->e2fs_gd[i * fs->e2fs_bsize / sizeof(struct ext2_gd)],
		    fs->e2fs_bsize);
		brelse(bp, 0);
	}

	/* Allocate a marker vnode. */
	mvp = vnalloc(mp);
	/*
	 * NOTE: not using the TAILQ_FOREACH here since in this loop vgone()
	 * and vclean() can be called indirectly
	 */
	mutex_enter(&mntvnode_lock);
loop:
	for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = vunmark(mvp)) {
		vmark(mvp, vp);
		if (vp->v_mount != mp || vismarker(vp))
			continue;
		/*
		 * Step 4: invalidate all inactive vnodes.
		 */
		if (vrecycle(vp, &mntvnode_lock)) {
			mutex_enter(&mntvnode_lock);
			(void)vunmark(mvp);
			goto loop;
		}
		/*
		 * Step 5: invalidate all cached file data.
		 */
		mutex_enter(vp->v_interlock);
		mutex_exit(&mntvnode_lock);
		if (vget(vp, LK_EXCLUSIVE)) {
			mutex_enter(&mntvnode_lock);
			(void)vunmark(mvp);
			goto loop;
		}
		if (vinvalbuf(vp, 0, cred, l, 0, 0))
			panic("ext2fs_reload: dirty2");
		/*
		 * Step 6: re-read inode data for all active vnodes.
		 */
		ip = VTOI(vp);
		error = bread(devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)),
		    (int)fs->e2fs_bsize, NOCRED, 0, &bp);
		if (error) {
			vput(vp);
			mutex_enter(&mntvnode_lock);
			(void)vunmark(mvp);
			break;
		}
		cp = (char *)bp->b_data +
		    (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs));
		e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din);
		ext2fs_set_inode_guid(ip);
		brelse(bp, 0);
		vput(vp);
		mutex_enter(&mntvnode_lock);
	}
	mutex_exit(&mntvnode_lock);
	vnfree(mvp);
	return (error);
}
コード例 #5
0
/*
 * 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
ext2fs_reload(struct mount *mp, kauth_cred_t cred, struct lwp *l)
{
	struct vnode *vp, *devvp;
	struct inode *ip;
	struct buf *bp;
	struct m_ext2fs *fs;
	struct ext2fs *newfs;
	int i, error;
	void *cp;
	struct ufsmount *ump;
	struct vnode_iterator *marker;

	if ((mp->mnt_flag & MNT_RDONLY) == 0)
		return (EINVAL);

	ump = VFSTOUFS(mp);
	/*
	 * Step 1: invalidate all cached meta-data.
	 */
	devvp = ump->um_devvp;
	vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
	error = vinvalbuf(devvp, 0, cred, l, 0, 0);
	VOP_UNLOCK(devvp);
	if (error)
		panic("ext2fs_reload: dirty1");

	fs = ump->um_e2fs;
	/*
	 * Step 2: re-read superblock from disk. Copy in new superblock, and compute
	 * in-memory values.
	 */
	error = bread(devvp, SBLOCK, SBSIZE, 0, &bp);
	if (error)
		return error;
	newfs = (struct ext2fs *)bp->b_data;
	e2fs_sbload(newfs, &fs->e2fs);

	brelse(bp, 0);

	error = ext2fs_sbfill(fs, (mp->mnt_flag & MNT_RDONLY) != 0);
	if (error)
		return error;

	/*
	 * Step 3: re-read summary information from disk.
	 */
	for (i = 0; i < fs->e2fs_ngdb; i++) {
		error = bread(devvp ,
		    EXT2_FSBTODB(fs, fs->e2fs.e2fs_first_dblock +
		    1 /* superblock */ + i),
		    fs->e2fs_bsize, 0, &bp);
		if (error) {
			return (error);
		}
		e2fs_cgload((struct ext2_gd *)bp->b_data,
		    &fs->e2fs_gd[i * fs->e2fs_bsize / sizeof(struct ext2_gd)],
		    fs->e2fs_bsize);
		brelse(bp, 0);
	}

	vfs_vnode_iterator_init(mp, &marker);
	while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) {
		/*
		 * Step 4: invalidate all inactive vnodes.
		 */
		if (vrecycle(vp))
			continue;
		/*
		 * Step 5: invalidate all cached file data.
		 */
		if (vn_lock(vp, LK_EXCLUSIVE)) {
			vrele(vp);
			continue;
		}
		if (vinvalbuf(vp, 0, cred, l, 0, 0))
			panic("ext2fs_reload: dirty2");
		/*
		 * Step 6: re-read inode data for all active vnodes.
		 */
		ip = VTOI(vp);
		error = bread(devvp, EXT2_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)),
		    (int)fs->e2fs_bsize, 0, &bp);
		if (error) {
			vput(vp);
			break;
		}
		cp = (char *)bp->b_data +
		    (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs));
		e2fs_iload((struct ext2fs_dinode *)cp, ip->i_din.e2fs_din);
		ext2fs_set_inode_guid(ip);
		brelse(bp, 0);
		vput(vp);
	}
	vfs_vnode_iterator_destroy(marker);
	return (error);
}