Esempio n. 1
0
static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
{
	int i;
	struct cramfs_super super;
	unsigned long root_offset;
	struct cramfs_sb_info *sbi;
	struct inode *root;

	sb->s_flags |= MS_RDONLY;

	sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;
	sb->s_fs_info = sbi;

	/* Invalidate the read buffers on mount: think disk change.. */
	mutex_lock(&read_mutex);
	for (i = 0; i < READ_BUFFERS; i++)
		buffer_blocknr[i] = -1;

	/* Read the first block and get the superblock from it */
	memcpy(&super, cramfs_read(sb, 0, sizeof(super)), sizeof(super));
	mutex_unlock(&read_mutex);

	/* Do sanity checks on the superblock */
	if (super.magic != CRAMFS_MAGIC) {
		/* check for wrong endianess */
		if (super.magic == CRAMFS_MAGIC_WEND) {
			if (!silent)
				printk(KERN_ERR "cramfs: wrong endianess\n");
			goto out;
		}

		/* check at 512 byte offset */
		mutex_lock(&read_mutex);
		memcpy(&super, cramfs_read(sb, 512, sizeof(super)), sizeof(super));
		mutex_unlock(&read_mutex);
		if (super.magic != CRAMFS_MAGIC) {
			if (super.magic == CRAMFS_MAGIC_WEND && !silent)
				printk(KERN_ERR "cramfs: wrong endianess\n");
			else if (!silent)
				printk(KERN_ERR "cramfs: wrong magic\n");
			goto out;
		}
	}

	/* get feature flags first */
	if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) {
		printk(KERN_ERR "cramfs: unsupported filesystem features\n");
		goto out;
	}

	/* Check that the root inode is in a sane state */
	if (!S_ISDIR(super.root.mode)) {
		printk(KERN_ERR "cramfs: root is not a directory\n");
		goto out;
	}
	/* correct strange, hard-coded permissions of mkcramfs */
	super.root.mode |= (S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);

	root_offset = super.root.offset << 2;
	if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) {
		sbi->size=super.size;
		sbi->blocks=super.fsid.blocks;
		sbi->files=super.fsid.files;
	} else {
		sbi->size=1<<28;
		sbi->blocks=0;
		sbi->files=0;
	}
	sbi->magic=super.magic;
	sbi->flags=super.flags;
	if (root_offset == 0)
		printk(KERN_INFO "cramfs: empty filesystem");
	else if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&
		 ((root_offset != sizeof(struct cramfs_super)) &&
		  (root_offset != 512 + sizeof(struct cramfs_super))))
	{
		printk(KERN_ERR "cramfs: bad root offset %lu\n", root_offset);
		goto out;
	}

	/* Set it all up.. */
	sb->s_op = &cramfs_ops;
	root = get_cramfs_inode(sb, &super.root, 0);
	if (IS_ERR(root))
		goto out;
	sb->s_root = d_alloc_root(root);
	if (!sb->s_root) {
		iput(root);
		goto out;
	}
	return 0;
out:
	kfree(sbi);
	sb->s_fs_info = NULL;
	return -EINVAL;
}
Esempio n. 2
0
/*
 * hfs_read_super()
 *
 * This is the function that is responsible for mounting an HFS
 * filesystem.	It performs all the tasks necessary to get enough data
 * from the disk to read the root inode.  This includes parsing the
 * mount options, dealing with Macintosh partitions, reading the
 * superblock and the allocation bitmap blocks, calling
 * hfs_btree_init() to get the necessary data about the extents and
 * catalog B-trees and, finally, reading the root inode into memory.
 */
static int hfs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct hfs_sb_info *sbi;
	struct hfs_find_data fd;
	hfs_cat_rec rec;
	struct inode *root_inode;
	int res;

	sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;
	sb->s_fs_info = sbi;
	INIT_HLIST_HEAD(&sbi->rsrc_inodes);

	res = -EINVAL;
	if (!parse_options((char *)data, sbi)) {
		printk(KERN_ERR "hfs: unable to parse mount options.\n");
		goto bail;
	}

	sb->s_op = &hfs_super_operations;
	sb->s_flags |= MS_NODIRATIME;
	mutex_init(&sbi->bitmap_lock);

	res = hfs_mdb_get(sb);
	if (res) {
		if (!silent)
			printk(KERN_WARNING "hfs: can't find a HFS filesystem on dev %s.\n",
				hfs_mdb_name(sb));
		res = -EINVAL;
		goto bail;
	}

	/* try to get the root inode */
	hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
	res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd);
	if (!res) {
		if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) {
			res =  -EIO;
			goto bail;
		}
		hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength);
	}
	if (res) {
		hfs_find_exit(&fd);
		goto bail_no_root;
	}
	res = -EINVAL;
	root_inode = hfs_iget(sb, &fd.search_key->cat, &rec);
	hfs_find_exit(&fd);
	if (!root_inode)
		goto bail_no_root;

	res = -ENOMEM;
	sb->s_root = d_alloc_root(root_inode);
	if (!sb->s_root)
		goto bail_iput;

	sb->s_root->d_op = &hfs_dentry_operations;

	/* everything's okay */
	return 0;

bail_iput:
	iput(root_inode);
bail_no_root:
	printk(KERN_ERR "hfs: get root inode failed.\n");
bail:
	hfs_mdb_put(sb);
	return res;
}
/* Allocate private field of the superblock, fill it.
 *
 * Finish filling the public superblock fields
 * Make the root directory
 * Load a set of NLS translations if needed.
 */
static int
befs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct buffer_head *bh;
	befs_sb_info *befs_sb;
	befs_super_block *disk_sb;
	struct inode *root;

	const unsigned long sb_block = 0;
	const off_t x86_sb_off = 512;

	sb->s_fs_info = kmalloc(sizeof (*befs_sb), GFP_KERNEL);
	if (sb->s_fs_info == NULL) {
		printk(KERN_ERR
		       "BeFS(%s): Unable to allocate memory for private "
		       "portion of superblock. Bailing.\n", sb->s_id);
		goto unaquire_none;
	}
	befs_sb = BEFS_SB(sb);
	memset(befs_sb, 0, sizeof(befs_sb_info));

	if (!parse_options((char *) data, &befs_sb->mount_opts)) {
		befs_error(sb, "cannot parse mount options");
		goto unaquire_priv_sbp;
	}

	befs_debug(sb, "---> befs_fill_super()");

#ifndef CONFIG_BEFS_RW
	if (!(sb->s_flags & MS_RDONLY)) {
		befs_warning(sb,
			     "No write support. Marking filesystem read-only");
		sb->s_flags |= MS_RDONLY;
	}
#endif				/* CONFIG_BEFS_RW */

	/*
	 * Set dummy blocksize to read super block.
	 * Will be set to real fs blocksize later.
	 *
	 * Linux 2.4.10 and later refuse to read blocks smaller than
	 * the hardsect size for the device. But we also need to read at 
	 * least 1k to get the second 512 bytes of the volume.
	 * -WD 10-26-01
	 */ 
	sb_min_blocksize(sb, 1024);

	if (!(bh = sb_bread(sb, sb_block))) {
		befs_error(sb, "unable to read superblock");
		goto unaquire_priv_sbp;
	}

	/* account for offset of super block on x86 */
	disk_sb = (befs_super_block *) bh->b_data;
	if ((le32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1) ||
	    (be32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1)) {
		befs_debug(sb, "Using PPC superblock location");
	} else {
		befs_debug(sb, "Using x86 superblock location");
		disk_sb =
		    (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
	}

	if (befs_load_sb(sb, disk_sb) != BEFS_OK)
		goto unaquire_bh;

	befs_dump_super_block(sb, disk_sb);

	brelse(bh);

	if (befs_check_sb(sb) != BEFS_OK)
		goto unaquire_priv_sbp;

	if( befs_sb->num_blocks > ~((sector_t)0) ) {
		befs_error(sb, "blocks count: %Lu "
			"is larger than the host can use",
			befs_sb->num_blocks);
		goto unaquire_priv_sbp;
	}

	/*
	 * set up enough so that it can read an inode
	 * Fill in kernel superblock fields from private sb
	 */
	sb->s_magic = BEFS_SUPER_MAGIC;
	/* Set real blocksize of fs */
	sb_set_blocksize(sb, (ulong) befs_sb->block_size);
	sb->s_op = (struct super_operations *) &befs_sops;
	root = iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
	sb->s_root = d_alloc_root(root);
	if (!sb->s_root) {
		iput(root);
		befs_error(sb, "get root inode failed");
		goto unaquire_priv_sbp;
	}

	/* load nls library */
	if (befs_sb->mount_opts.iocharset) {
		befs_debug(sb, "Loading nls: %s",
			   befs_sb->mount_opts.iocharset);
		befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset);
		if (!befs_sb->nls) {
			befs_warning(sb, "Cannot load nls %s"
					" loading default nls",
					befs_sb->mount_opts.iocharset);
			befs_sb->nls = load_nls_default();
		}
	/* load default nls if none is specified  in mount options */
	} else {
		befs_debug(sb, "Loading default nls");
		befs_sb->nls = load_nls_default();
	}

	return 0;
/*****************/
      unaquire_bh:
	brelse(bh);

      unaquire_priv_sbp:
	kfree(sb->s_fs_info);

      unaquire_none:
	sb->s_fs_info = NULL;
	return -EINVAL;
}
Esempio n. 4
0
int autofs_fill_super(struct super_block *s, void *data, int silent)
{
	struct inode * root_inode;
	struct dentry * root;
	struct file * pipe;
	int pipefd;
	struct autofs_sb_info *sbi;
	int minproto, maxproto;
	pid_t pgid;

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi)
		goto fail_unlock;
	DPRINTK(("autofs: starting up, sbi = %p\n",sbi));

	s->s_fs_info = sbi;
	sbi->magic = AUTOFS_SBI_MAGIC;
	sbi->pipe = NULL;
	sbi->catatonic = 1;
	sbi->exp_timeout = 0;
	autofs_initialize_hash(&sbi->dirhash);
	sbi->queues = NULL;
	memset(sbi->symlink_bitmap, 0, sizeof(long)*AUTOFS_SYMLINK_BITMAP_LEN);
	sbi->next_dir_ino = AUTOFS_FIRST_DIR_INO;
	s->s_blocksize = 1024;
	s->s_blocksize_bits = 10;
	s->s_magic = AUTOFS_SUPER_MAGIC;
	s->s_op = &autofs_sops;
	s->s_time_gran = 1;
	sbi->sb = s;

	root_inode = iget(s, AUTOFS_ROOT_INO);
	root = d_alloc_root(root_inode);
	pipe = NULL;

	if (!root)
		goto fail_iput;

	/* Can this call block?  - WTF cares? s is locked. */
	if (parse_options(data, &pipefd, &root_inode->i_uid,
				&root_inode->i_gid, &pgid, &minproto,
				&maxproto)) {
		printk("autofs: called with bogus options\n");
		goto fail_dput;
	}

	/* Couldn't this be tested earlier? */
	if (minproto > AUTOFS_PROTO_VERSION ||
	     maxproto < AUTOFS_PROTO_VERSION) {
		printk("autofs: kernel does not match daemon version\n");
		goto fail_dput;
	}

	DPRINTK(("autofs: pipe fd = %d, pgrp = %u\n", pipefd, pgid));
	sbi->oz_pgrp = find_get_pid(pgid);

	if (!sbi->oz_pgrp) {
		printk("autofs: could not find process group %d\n", pgid);
		goto fail_dput;
	}

	pipe = fget(pipefd);
	
	if (!pipe) {
		printk("autofs: could not open pipe file descriptor\n");
		goto fail_put_pid;
	}

	if (!pipe->f_op || !pipe->f_op->write)
		goto fail_fput;
	sbi->pipe = pipe;
	sbi->catatonic = 0;

	/*
	 * Success! Install the root dentry now to indicate completion.
	 */
	s->s_root = root;
	return 0;

fail_fput:
	printk("autofs: pipe file descriptor does not contain proper ops\n");
	fput(pipe);
fail_put_pid:
	put_pid(sbi->oz_pgrp);
fail_dput:
	dput(root);
	goto fail_free;
fail_iput:
	printk("autofs: get root dentry failed\n");
	iput(root_inode);
fail_free:
	kfree(sbi);
	s->s_fs_info = NULL;
fail_unlock:
	return -EINVAL;
}
Esempio n. 5
0
struct super_block *efs_read_super(struct super_block *s, void *d, int silent) {
	kdev_t dev = s->s_dev;
	struct efs_sb_info *sb;
	struct buffer_head *bh;

 	sb = SUPER_INFO(s);
 
	s->s_magic		= EFS_SUPER_MAGIC;
	s->s_blocksize		= EFS_BLOCKSIZE;
	s->s_blocksize_bits	= EFS_BLOCKSIZE_BITS;
	
	if( set_blocksize(dev, EFS_BLOCKSIZE) < 0)
	{
		printk(KERN_ERR "EFS: device does not support %d byte blocks\n",
			EFS_BLOCKSIZE);
		goto out_no_fs_ul;
	}
  
	/* read the vh (volume header) block */
	bh = sb_bread(s, 0);

	if (!bh) {
		printk(KERN_ERR "EFS: cannot read volume header\n");
		goto out_no_fs_ul;
	}

	/*
	 * if this returns zero then we didn't find any partition table.
	 * this isn't (yet) an error - just assume for the moment that
	 * the device is valid and go on to search for a superblock.
	 */
	sb->fs_start = efs_validate_vh((struct volume_header *) bh->b_data);
	brelse(bh);

	if (sb->fs_start == -1) {
		goto out_no_fs_ul;
	}

	bh = sb_bread(s, sb->fs_start + EFS_SUPER);
	if (!bh) {
		printk(KERN_ERR "EFS: cannot read superblock\n");
		goto out_no_fs_ul;
	}
		
	if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
#ifdef DEBUG
		printk(KERN_WARNING "EFS: invalid superblock at block %u\n", sb->fs_start + EFS_SUPER);
#endif
		brelse(bh);
		goto out_no_fs_ul;
	}
	brelse(bh);

	if (!(s->s_flags & MS_RDONLY)) {
#ifdef DEBUG
		printk(KERN_INFO "EFS: forcing read-only mode\n");
#endif
		s->s_flags |= MS_RDONLY;
	}
	s->s_op   = &efs_superblock_operations;
	s->s_root = d_alloc_root(iget(s, EFS_ROOTINODE));
 
	if (!(s->s_root)) {
		printk(KERN_ERR "EFS: get root inode failed\n");
		goto out_no_fs;
	}

	return(s);

out_no_fs_ul:
out_no_fs:
	return(NULL);
}
Esempio n. 6
0
static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
{
	struct ncp_mount_data_kernel data;
	struct ncp_server *server;
	struct file *ncp_filp;
	struct inode *root_inode;
	struct inode *sock_inode;
	struct socket *sock;
	int error;
	int default_bufsize;
#ifdef CONFIG_NCPFS_PACKET_SIGNING
	int options;
#endif
	struct ncp_entry_info finfo;

	server = kmalloc(sizeof(struct ncp_server), GFP_KERNEL);
	if (!server)
		return -ENOMEM;
	sb->s_fs_info = server;
	memset(server, 0, sizeof(struct ncp_server));

	error = -EFAULT;
	if (raw_data == NULL)
		goto out;
	switch (*(int*)raw_data) {
		case NCP_MOUNT_VERSION:
			{
				struct ncp_mount_data* md = (struct ncp_mount_data*)raw_data;

				data.flags = md->flags;
				data.int_flags = NCP_IMOUNT_LOGGEDIN_POSSIBLE;
				data.mounted_uid = md->mounted_uid;
				data.wdog_pid = md->wdog_pid;
				data.ncp_fd = md->ncp_fd;
				data.time_out = md->time_out;
				data.retry_count = md->retry_count;
				data.uid = md->uid;
				data.gid = md->gid;
				data.file_mode = md->file_mode;
				data.dir_mode = md->dir_mode;
				data.info_fd = -1;
				memcpy(data.mounted_vol, md->mounted_vol,
					NCP_VOLNAME_LEN+1);
			}
			break;
		case NCP_MOUNT_VERSION_V4:
			{
				struct ncp_mount_data_v4* md = (struct ncp_mount_data_v4*)raw_data;

				data.flags = md->flags;
				data.int_flags = 0;
				data.mounted_uid = md->mounted_uid;
				data.wdog_pid = md->wdog_pid;
				data.ncp_fd = md->ncp_fd;
				data.time_out = md->time_out;
				data.retry_count = md->retry_count;
				data.uid = md->uid;
				data.gid = md->gid;
				data.file_mode = md->file_mode;
				data.dir_mode = md->dir_mode;
				data.info_fd = -1;
				data.mounted_vol[0] = 0;
			}
			break;
		default:
			error = -ECHRNG;
			if (memcmp(raw_data, "vers", 4) == 0) {
				error = ncp_parse_options(&data, raw_data);
			}
			if (error)
				goto out;
			break;
	}
	error = -EBADF;
	ncp_filp = fget(data.ncp_fd);
	if (!ncp_filp)
		goto out;
	error = -ENOTSOCK;
	sock_inode = ncp_filp->f_dentry->d_inode;
	if (!S_ISSOCK(sock_inode->i_mode))
		goto out_fput;
	sock = SOCKET_I(sock_inode);
	if (!sock)
		goto out_fput;
		
	if (sock->type == SOCK_STREAM)
		default_bufsize = 0xF000;
	else
		default_bufsize = 1024;

	sb->s_flags |= MS_NODIRATIME;	/* probably even noatime */
	sb->s_maxbytes = 0xFFFFFFFFU;
	sb->s_blocksize = 1024;	/* Eh...  Is this correct? */
	sb->s_blocksize_bits = 10;
	sb->s_magic = NCP_SUPER_MAGIC;
	sb->s_op = &ncp_sops;

	server = NCP_SBP(sb);
	memset(server, 0, sizeof(*server));

	server->ncp_filp = ncp_filp;
	server->ncp_sock = sock;
	
	if (data.info_fd != -1) {
		struct socket *info_sock;

		error = -EBADF;
		server->info_filp = fget(data.info_fd);
		if (!server->info_filp)
			goto out_fput;
		error = -ENOTSOCK;
		sock_inode = server->info_filp->f_dentry->d_inode;
		if (!S_ISSOCK(sock_inode->i_mode))
			goto out_fput2;
		info_sock = SOCKET_I(sock_inode);
		if (!info_sock)
			goto out_fput2;
		error = -EBADFD;
		if (info_sock->type != SOCK_STREAM)
			goto out_fput2;
		server->info_sock = info_sock;
	}

/*	server->lock = 0;	*/
	mutex_init(&server->mutex);
	server->packet = NULL;
/*	server->buffer_size = 0;	*/
/*	server->conn_status = 0;	*/
/*	server->root_dentry = NULL;	*/
/*	server->root_setuped = 0;	*/
#ifdef CONFIG_NCPFS_PACKET_SIGNING
/*	server->sign_wanted = 0;	*/
/*	server->sign_active = 0;	*/
#endif
	server->auth.auth_type = NCP_AUTH_NONE;
/*	server->auth.object_name_len = 0;	*/
/*	server->auth.object_name = NULL;	*/
/*	server->auth.object_type = 0;		*/
/*	server->priv.len = 0;			*/
/*	server->priv.data = NULL;		*/

	server->m = data;
	/* Althought anything producing this is buggy, it happens
	   now because of PATH_MAX changes.. */
	if (server->m.time_out < 1) {
		server->m.time_out = 10;
		printk(KERN_INFO "You need to recompile your ncpfs utils..\n");
	}
	server->m.time_out = server->m.time_out * HZ / 100;
	server->m.file_mode = (server->m.file_mode & S_IRWXUGO) | S_IFREG;
	server->m.dir_mode = (server->m.dir_mode & S_IRWXUGO) | S_IFDIR;

#ifdef CONFIG_NCPFS_NLS
	/* load the default NLS charsets */
	server->nls_vol = load_nls_default();
	server->nls_io = load_nls_default();
#endif /* CONFIG_NCPFS_NLS */

	server->dentry_ttl = 0;	/* no caching */

	INIT_LIST_HEAD(&server->tx.requests);
	mutex_init(&server->rcv.creq_mutex);
	server->tx.creq		= NULL;
	server->rcv.creq	= NULL;
	server->data_ready	= sock->sk->sk_data_ready;
	server->write_space	= sock->sk->sk_write_space;
	server->error_report	= sock->sk->sk_error_report;
	sock->sk->sk_user_data	= server;

	init_timer(&server->timeout_tm);
#undef NCP_PACKET_SIZE
#define NCP_PACKET_SIZE 131072
	error = -ENOMEM;
	server->packet_size = NCP_PACKET_SIZE;
	server->packet = vmalloc(NCP_PACKET_SIZE);
	if (server->packet == NULL)
		goto out_nls;

	sock->sk->sk_data_ready	  = ncp_tcp_data_ready;
	sock->sk->sk_error_report = ncp_tcp_error_report;
	if (sock->type == SOCK_STREAM) {
		server->rcv.ptr = (unsigned char*)&server->rcv.buf;
		server->rcv.len = 10;
		server->rcv.state = 0;
		INIT_WORK(&server->rcv.tq, ncp_tcp_rcv_proc, server);
		INIT_WORK(&server->tx.tq, ncp_tcp_tx_proc, server);
		sock->sk->sk_write_space = ncp_tcp_write_space;
	} else {
		INIT_WORK(&server->rcv.tq, ncpdgram_rcv_proc, server);
		INIT_WORK(&server->timeout_tq, ncpdgram_timeout_proc, server);
		server->timeout_tm.data = (unsigned long)server;
		server->timeout_tm.function = ncpdgram_timeout_call;
	}

	ncp_lock_server(server);
	error = ncp_connect(server);
	ncp_unlock_server(server);
	if (error < 0)
		goto out_packet;
	DPRINTK("ncp_fill_super: NCP_SBP(sb) = %x\n", (int) NCP_SBP(sb));

	error = -EMSGSIZE;	/* -EREMOTESIDEINCOMPATIBLE */
#ifdef CONFIG_NCPFS_PACKET_SIGNING
	if (ncp_negotiate_size_and_options(server, default_bufsize,
		NCP_DEFAULT_OPTIONS, &(server->buffer_size), &options) == 0)
	{
		if (options != NCP_DEFAULT_OPTIONS)
		{
			if (ncp_negotiate_size_and_options(server, 
				default_bufsize,
				options & 2, 
				&(server->buffer_size), &options) != 0)
				
			{
				goto out_disconnect;
			}
		}
		if (options & 2)
			server->sign_wanted = 1;
	}
	else 
#endif	/* CONFIG_NCPFS_PACKET_SIGNING */
	if (ncp_negotiate_buffersize(server, default_bufsize,
  				     &(server->buffer_size)) != 0)
		goto out_disconnect;
	DPRINTK("ncpfs: bufsize = %d\n", server->buffer_size);

	memset(&finfo, 0, sizeof(finfo));
	finfo.i.attributes	= aDIR;
	finfo.i.dataStreamSize	= 0;	/* ignored */
	finfo.i.dirEntNum	= 0;
	finfo.i.DosDirNum	= 0;
#ifdef CONFIG_NCPFS_SMALLDOS
	finfo.i.NSCreator	= NW_NS_DOS;
#endif
	finfo.volume		= NCP_NUMBER_OF_VOLUMES;
	/* set dates of mountpoint to Jan 1, 1986; 00:00 */
	finfo.i.creationTime	= finfo.i.modifyTime
				= cpu_to_le16(0x0000);
	finfo.i.creationDate	= finfo.i.modifyDate
				= finfo.i.lastAccessDate
				= cpu_to_le16(0x0C21);
	finfo.i.nameLen		= 0;
	finfo.i.entryName[0]	= '\0';

	finfo.opened		= 0;
	finfo.ino		= 2;	/* tradition */

	server->name_space[finfo.volume] = NW_NS_DOS;

	error = -ENOMEM;
        root_inode = ncp_iget(sb, &finfo);
        if (!root_inode)
		goto out_disconnect;
	DPRINTK("ncp_fill_super: root vol=%d\n", NCP_FINFO(root_inode)->volNumber);
	sb->s_root = d_alloc_root(root_inode);
        if (!sb->s_root)
		goto out_no_root;
	sb->s_root->d_op = &ncp_root_dentry_operations;
	return 0;

out_no_root:
	iput(root_inode);
out_disconnect:
	ncp_lock_server(server);
	ncp_disconnect(server);
	ncp_unlock_server(server);
out_packet:
	ncp_stop_tasks(server);
	vfree(server->packet);
out_nls:
#ifdef CONFIG_NCPFS_NLS
	unload_nls(server->nls_io);
	unload_nls(server->nls_vol);
#endif
out_fput2:
	if (server->info_filp)
		fput(server->info_filp);
out_fput:
	/* 23/12/1998 Marcin Dalecki <[email protected]>:
	 * 
	 * The previously used put_filp(ncp_filp); was bogous, since
	 * it doesn't proper unlocking.
	 */
	fput(ncp_filp);
out:
	sb->s_fs_info = NULL;
	kfree(server);
	return error;
}
Esempio n. 7
0
/**
 * nilfs_fill_super() - initialize a super block instance
 * @sb: super_block
 * @data: mount options
 * @silent: silent mode flag
 * @nilfs: the_nilfs struct
 *
 * This function is called exclusively by nilfs->ns_mount_mutex.
 * So, the recovery process is protected from other simultaneous mounts.
 */
static int
nilfs_fill_super(struct super_block *sb, void *data, int silent,
		 struct the_nilfs *nilfs)
{
	struct nilfs_sb_info *sbi;
	struct inode *root;
	__u64 cno;
	int err;

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;

	sb->s_fs_info = sbi;

	get_nilfs(nilfs);
	sbi->s_nilfs = nilfs;
	sbi->s_super = sb;
	atomic_set(&sbi->s_count, 1);

	err = init_nilfs(nilfs, sbi, (char *)data);
	if (err)
		goto failed_sbi;

	spin_lock_init(&sbi->s_inode_lock);
	INIT_LIST_HEAD(&sbi->s_dirty_files);
	INIT_LIST_HEAD(&sbi->s_list);

	/*
	 * Following initialization is overlapped because
	 * nilfs_sb_info structure has been cleared at the beginning.
	 * But we reserve them to keep our interest and make ready
	 * for the future change.
	 */
	get_random_bytes(&sbi->s_next_generation,
			 sizeof(sbi->s_next_generation));
	spin_lock_init(&sbi->s_next_gen_lock);

	sb->s_op = &nilfs_sops;
	sb->s_export_op = &nilfs_export_ops;
	sb->s_root = NULL;
	sb->s_time_gran = 1;
	sb->s_bdi = nilfs->ns_bdi;

	err = load_nilfs(nilfs, sbi);
	if (err)
		goto failed_sbi;

	cno = nilfs_last_cno(nilfs);

	if (sb->s_flags & MS_RDONLY) {
		if (nilfs_test_opt(sbi, SNAPSHOT)) {
			down_read(&nilfs->ns_segctor_sem);
			err = nilfs_cpfile_is_snapshot(nilfs->ns_cpfile,
						       sbi->s_snapshot_cno);
			up_read(&nilfs->ns_segctor_sem);
			if (err < 0) {
				if (err == -ENOENT)
					err = -EINVAL;
				goto failed_sbi;
			}
			if (!err) {
				printk(KERN_ERR
				       "NILFS: The specified checkpoint is "
				       "not a snapshot "
				       "(checkpoint number=%llu).\n",
				       (unsigned long long)sbi->s_snapshot_cno);
				err = -EINVAL;
				goto failed_sbi;
			}
			cno = sbi->s_snapshot_cno;
		}
	}

	err = nilfs_attach_checkpoint(sbi, cno);
	if (err) {
		printk(KERN_ERR "NILFS: error loading a checkpoint"
		       " (checkpoint number=%llu).\n", (unsigned long long)cno);
		goto failed_sbi;
	}

	if (!(sb->s_flags & MS_RDONLY)) {
		err = nilfs_attach_segment_constructor(sbi);
		if (err)
			goto failed_checkpoint;
	}

	root = nilfs_iget(sb, NILFS_ROOT_INO);
	if (IS_ERR(root)) {
		printk(KERN_ERR "NILFS: get root inode failed\n");
		err = PTR_ERR(root);
		goto failed_segctor;
	}
	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
		iput(root);
		printk(KERN_ERR "NILFS: corrupt root inode.\n");
		err = -EINVAL;
		goto failed_segctor;
	}
	sb->s_root = d_alloc_root(root);
	if (!sb->s_root) {
		iput(root);
		printk(KERN_ERR "NILFS: get root dentry failed\n");
		err = -ENOMEM;
		goto failed_segctor;
	}

	if (!(sb->s_flags & MS_RDONLY)) {
		down_write(&nilfs->ns_sem);
		nilfs_setup_super(sbi);
		up_write(&nilfs->ns_sem);
	}

	down_write(&nilfs->ns_super_sem);
	if (!nilfs_test_opt(sbi, SNAPSHOT))
		nilfs->ns_current = sbi;
	up_write(&nilfs->ns_super_sem);

	return 0;

 failed_segctor:
	nilfs_detach_segment_constructor(sbi);

 failed_checkpoint:
	nilfs_detach_checkpoint(sbi);

 failed_sbi:
	put_nilfs(nilfs);
	sb->s_fs_info = NULL;
	nilfs_put_sbinfo(sbi);
	return err;
}
Esempio n. 8
0
static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct squashfs_sb_info *msblk;
	struct squashfs_super_block *sblk = NULL;
	char b[BDEVNAME_SIZE];
	struct inode *root;
	long long root_inode;
	unsigned short flags;
	unsigned int fragments;
	u64 lookup_table_start, xattr_id_table_start, next_table;
	int err;

	TRACE("Entered squashfs_fill_superblock\n");

	sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
	if (sb->s_fs_info == NULL) {
		ERROR("Failed to allocate squashfs_sb_info\n");
		return -ENOMEM;
	}
	msblk = sb->s_fs_info;

	msblk->devblksize = sb_min_blocksize(sb, BLOCK_SIZE);
	msblk->devblksize_log2 = ffz(~msblk->devblksize);

	mutex_init(&msblk->read_data_mutex);
	mutex_init(&msblk->meta_index_mutex);

	/*
	 * msblk->bytes_used is checked in squashfs_read_table to ensure reads
	 * are not beyond filesystem end.  But as we're using
	 * squashfs_read_table here to read the superblock (including the value
	 * of bytes_used) we need to set it to an initial sensible dummy value
	 */
	msblk->bytes_used = sizeof(*sblk);
	sblk = squashfs_read_table(sb, SQUASHFS_START, sizeof(*sblk));

	if (IS_ERR(sblk)) {
		ERROR("unable to read squashfs_super_block\n");
		err = PTR_ERR(sblk);
		sblk = NULL;
		goto failed_mount;
	}

	err = -EINVAL;

	/* Check it is a SQUASHFS superblock */
	sb->s_magic = le32_to_cpu(sblk->s_magic);
	if (sb->s_magic != SQUASHFS_MAGIC) {
		if (!silent)
			ERROR("Can't find a SQUASHFS superblock on %s\n",
						bdevname(sb->s_bdev, b));
		goto failed_mount;
	}

	/* Check the MAJOR & MINOR versions and lookup compression type */
	msblk->decompressor = supported_squashfs_filesystem(
			le16_to_cpu(sblk->s_major),
			le16_to_cpu(sblk->s_minor),
			le16_to_cpu(sblk->compression));
	if (msblk->decompressor == NULL)
		goto failed_mount;

	/* Check the filesystem does not extend beyond the end of the
	   block device */
	msblk->bytes_used = le64_to_cpu(sblk->bytes_used);
	if (msblk->bytes_used < 0 || msblk->bytes_used >
			i_size_read(sb->s_bdev->bd_inode))
		goto failed_mount;

	/* Check block size for sanity */
	msblk->block_size = le32_to_cpu(sblk->block_size);
	if (msblk->block_size > SQUASHFS_FILE_MAX_SIZE)
		goto failed_mount;

	/*
	 * Check the system page size is not larger than the filesystem
	 * block size (by default 128K).  This is currently not supported.
	 */
	if (PAGE_CACHE_SIZE > msblk->block_size) {
		ERROR("Page size > filesystem block size (%d).  This is "
			"currently not supported!\n", msblk->block_size);
		goto failed_mount;
	}

	msblk->block_log = le16_to_cpu(sblk->block_log);
	if (msblk->block_log > SQUASHFS_FILE_MAX_LOG)
		goto failed_mount;

	/* Check the root inode for sanity */
	root_inode = le64_to_cpu(sblk->root_inode);
	if (SQUASHFS_INODE_OFFSET(root_inode) > SQUASHFS_METADATA_SIZE)
		goto failed_mount;

	msblk->inode_table = le64_to_cpu(sblk->inode_table_start);
	msblk->directory_table = le64_to_cpu(sblk->directory_table_start);
	msblk->inodes = le32_to_cpu(sblk->inodes);
	flags = le16_to_cpu(sblk->flags);

	TRACE("Found valid superblock on %s\n", bdevname(sb->s_bdev, b));
	TRACE("Inodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(flags)
				? "un" : "");
	TRACE("Data is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(flags)
				? "un" : "");
	TRACE("Filesystem size %lld bytes\n", msblk->bytes_used);
	TRACE("Block size %d\n", msblk->block_size);
	TRACE("Number of inodes %d\n", msblk->inodes);
	TRACE("Number of fragments %d\n", le32_to_cpu(sblk->fragments));
	TRACE("Number of ids %d\n", le16_to_cpu(sblk->no_ids));
	TRACE("sblk->inode_table_start %llx\n", msblk->inode_table);
	TRACE("sblk->directory_table_start %llx\n", msblk->directory_table);
	TRACE("sblk->fragment_table_start %llx\n",
		(u64) le64_to_cpu(sblk->fragment_table_start));
	TRACE("sblk->id_table_start %llx\n",
		(u64) le64_to_cpu(sblk->id_table_start));

	sb->s_maxbytes = MAX_LFS_FILESIZE;
	sb->s_flags |= MS_RDONLY;
	sb->s_op = &squashfs_super_ops;

	err = -ENOMEM;

	msblk->block_cache = squashfs_cache_init("metadata",
			SQUASHFS_CACHED_BLKS, SQUASHFS_METADATA_SIZE);
	if (msblk->block_cache == NULL)
		goto failed_mount;

	/* Allocate read_page block */
	msblk->read_page = squashfs_cache_init("data", 1, msblk->block_size);
	if (msblk->read_page == NULL) {
		ERROR("Failed to allocate read_page block\n");
		goto failed_mount;
	}

	msblk->stream = squashfs_decompressor_init(sb, flags);
	if (IS_ERR(msblk->stream)) {
		err = PTR_ERR(msblk->stream);
		msblk->stream = NULL;
		goto failed_mount;
	}

	/* Handle xattrs */
	sb->s_xattr = squashfs_xattr_handlers;
	xattr_id_table_start = le64_to_cpu(sblk->xattr_id_table_start);
	if (xattr_id_table_start == SQUASHFS_INVALID_BLK) {
		next_table = msblk->bytes_used;
		goto allocate_id_index_table;
	}

	/* Allocate and read xattr id lookup table */
	msblk->xattr_id_table = squashfs_read_xattr_id_table(sb,
		xattr_id_table_start, &msblk->xattr_table, &msblk->xattr_ids);
	if (IS_ERR(msblk->xattr_id_table)) {
		ERROR("unable to read xattr id index table\n");
		err = PTR_ERR(msblk->xattr_id_table);
		msblk->xattr_id_table = NULL;
		if (err != -ENOTSUPP)
			goto failed_mount;
	}
	next_table = msblk->xattr_table;

allocate_id_index_table:
	/* Allocate and read id index table */
	msblk->id_table = squashfs_read_id_index_table(sb,
		le64_to_cpu(sblk->id_table_start), next_table,
		le16_to_cpu(sblk->no_ids));
	if (IS_ERR(msblk->id_table)) {
		ERROR("unable to read id index table\n");
		err = PTR_ERR(msblk->id_table);
		msblk->id_table = NULL;
		goto failed_mount;
	}
	next_table = le64_to_cpu(msblk->id_table[0]);

	/* Handle inode lookup table */
	lookup_table_start = le64_to_cpu(sblk->lookup_table_start);
	if (lookup_table_start == SQUASHFS_INVALID_BLK)
		goto handle_fragments;

	/* Allocate and read inode lookup table */
	msblk->inode_lookup_table = squashfs_read_inode_lookup_table(sb,
		lookup_table_start, next_table, msblk->inodes);
	if (IS_ERR(msblk->inode_lookup_table)) {
		ERROR("unable to read inode lookup table\n");
		err = PTR_ERR(msblk->inode_lookup_table);
		msblk->inode_lookup_table = NULL;
		goto failed_mount;
	}
	next_table = le64_to_cpu(msblk->inode_lookup_table[0]);

	sb->s_export_op = &squashfs_export_ops;

handle_fragments:
	fragments = le32_to_cpu(sblk->fragments);
	if (fragments == 0)
		goto check_directory_table;

	msblk->fragment_cache = squashfs_cache_init("fragment",
		SQUASHFS_CACHED_FRAGMENTS, msblk->block_size);
	if (msblk->fragment_cache == NULL) {
		err = -ENOMEM;
		goto failed_mount;
	}

	/* Allocate and read fragment index table */
	msblk->fragment_index = squashfs_read_fragment_index_table(sb,
		le64_to_cpu(sblk->fragment_table_start), next_table, fragments);
	if (IS_ERR(msblk->fragment_index)) {
		ERROR("unable to read fragment index table\n");
		err = PTR_ERR(msblk->fragment_index);
		msblk->fragment_index = NULL;
		goto failed_mount;
	}
	next_table = le64_to_cpu(msblk->fragment_index[0]);

check_directory_table:
	/* Sanity check directory_table */
	if (msblk->directory_table > next_table) {
		err = -EINVAL;
		goto failed_mount;
	}

	/* Sanity check inode_table */
	if (msblk->inode_table >= msblk->directory_table) {
		err = -EINVAL;
		goto failed_mount;
	}

	/* allocate root */
	root = new_inode(sb);
	if (!root) {
		err = -ENOMEM;
		goto failed_mount;
	}

	err = squashfs_read_inode(root, root_inode);
	if (err) {
		make_bad_inode(root);
		iput(root);
		goto failed_mount;
	}
	insert_inode_hash(root);

	sb->s_root = d_alloc_root(root);
	if (sb->s_root == NULL) {
		ERROR("Root inode create failed\n");
		err = -ENOMEM;
		iput(root);
		goto failed_mount;
	}

	TRACE("Leaving squashfs_fill_super\n");
	kfree(sblk);
	return 0;

failed_mount:
	squashfs_cache_delete(msblk->block_cache);
	squashfs_cache_delete(msblk->fragment_cache);
	squashfs_cache_delete(msblk->read_page);
	squashfs_decompressor_free(msblk, msblk->stream);
	kfree(msblk->inode_lookup_table);
	kfree(msblk->fragment_index);
	kfree(msblk->id_table);
	kfree(msblk->xattr_id_table);
	kfree(sb->s_fs_info);
	sb->s_fs_info = NULL;
	kfree(sblk);
	return err;
}
Esempio n. 9
0
static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
{
	int i;
	struct cramfs_super super;
	unsigned long root_offset;
	struct cramfs_sb_info *sbi;
	struct inode *root;

	sb->s_flags |= MS_RDONLY;

	sbi = kzalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;
	sb->s_fs_info = sbi;
	cramfs_read = cramfs_read_comm;

	if (MAJOR(sb->s_dev) == MTD_BLOCK_MAJOR) {
		struct mtd_info *mtd;
		int blocks, *block_map;

		mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
		if (!mtd)
			goto not_mtdblock;

		if (mtd->type != MTD_NANDFLASH)
			goto not_mtdblock;

		cramfs_read = cramfs_read_nand;
		sbi->mtd = mtd;

		blocks = mtd->size / mtd->erasesize;
		block_map = kmalloc(blocks * sizeof(int), GFP_KERNEL);

		for (i = 0; i < blocks; i++) {
			block_map[i] = -1;
		}

		sbi->block_map = block_map;
		sbi->nblock = blocks;
	}
not_mtdblock:
	/* Invalidate the read buffers on mount: think disk change.. */
	mutex_lock(&read_mutex);
	for (i = 0; i < READ_BUFFERS; i++)
		buffer_blocknr[i] = -1;

	/* Read the first block and get the superblock from it */
	memcpy(&super, cramfs_read(sb, 0, sizeof(super)), sizeof(super));
	mutex_unlock(&read_mutex);

	/* Do sanity checks on the superblock */
	if (super.magic != CRAMFS_MAGIC) {
		/* check for wrong endianess */
		if (super.magic == CRAMFS_MAGIC_WEND) {
			if (!silent)
				printk(KERN_ERR "cramfs: wrong endianess\n");
			goto out;
		}

		/* check at 512 byte offset */
		mutex_lock(&read_mutex);
		memcpy(&super, cramfs_read(sb, 512, sizeof(super)), sizeof(super));
		mutex_unlock(&read_mutex);
		if (super.magic != CRAMFS_MAGIC) {
			if (super.magic == CRAMFS_MAGIC_WEND && !silent)
				printk(KERN_ERR "cramfs: wrong endianess\n");
			else if (!silent)
				printk(KERN_ERR "cramfs: wrong magic\n");
			goto out;
		}
	}

	/* get feature flags first */
	if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) {
		printk(KERN_ERR "cramfs: unsupported filesystem features\n");
		goto out;
	}

	/* Check that the root inode is in a sane state */
	if (!S_ISDIR(super.root.mode)) {
		printk(KERN_ERR "cramfs: root is not a directory\n");
		goto out;
	}
	root_offset = super.root.offset << 2;
	if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) {
		sbi->size=super.size;
		sbi->blocks=super.fsid.blocks;
		sbi->files=super.fsid.files;
	} else {
		sbi->size=1<<28;
		sbi->blocks=0;
		sbi->files=0;
	}
	sbi->magic=super.magic;
	sbi->flags=super.flags;
	if (root_offset == 0)
		printk(KERN_INFO "cramfs: empty filesystem");
	else if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&
		 ((root_offset != sizeof(struct cramfs_super)) &&
		  (root_offset != 512 + sizeof(struct cramfs_super))))
	{
		printk(KERN_ERR "cramfs: bad root offset %lu\n", root_offset);
		goto out;
	}

	/* Set it all up.. */
	sb->s_op = &cramfs_ops;
	root = get_cramfs_inode(sb, &super.root);
	if (!root)
		goto out;
	sb->s_root = d_alloc_root(root);
	if (!sb->s_root) {
		iput(root);
		goto out;
	}
	return 0;
out:
	kfree(sbi);
	sb->s_fs_info = NULL;
	return -EINVAL;
}
Esempio n. 10
0
static int
HgfsGetRootDentry(struct super_block *sb,       // IN: Super block object
                  struct dentry **rootDentry)   // OUT: Root dentry
{
   int result = -ENOMEM;
   struct inode *rootInode;
   struct dentry *tempRootDentry = NULL;
   struct HgfsAttrInfo rootDentryAttr;
   HgfsInodeInfo *iinfo;

   ASSERT(sb);
   ASSERT(rootDentry);

   LOG(6, (KERN_DEBUG "VMware hgfs: %s: entered\n", __func__));

   rootInode = HgfsGetInode(sb, HGFS_ROOT_INO);
   if (rootInode == NULL) {
      LOG(6, (KERN_DEBUG "VMware hgfs: %s: Could not get the root inode\n",
             __func__));
      goto exit;
   }

   /*
    * On an allocation failure in read_super, the inode will have been
    * marked "bad". If it was, we certainly don't want to start playing with
    * the HgfsInodeInfo. So quietly put the inode back and fail.
    */
   if (is_bad_inode(rootInode)) {
      LOG(6, (KERN_DEBUG "VMware hgfs: %s: encountered bad inode\n",
             __func__));
      goto exit;
   }

   tempRootDentry = d_alloc_root(rootInode);
   if (tempRootDentry == NULL) {
      LOG(4, (KERN_WARNING "VMware hgfs: %s: Could not get "
              "root dentry\n", __func__));
      goto exit;
   }

   rootInode = NULL;

   result = HgfsPrivateGetattr(tempRootDentry, &rootDentryAttr, NULL);
   if (result) {
      LOG(4, (KERN_WARNING "VMware hgfs: HgfsReadSuper: Could not"
             "instantiate the root dentry\n"));
      goto exit;
   }

   iinfo = INODE_GET_II_P(tempRootDentry->d_inode);
   iinfo->isFakeInodeNumber = FALSE;
   iinfo->isReferencedInode = TRUE;

   if (rootDentryAttr.mask & HGFS_ATTR_VALID_FILEID) {
      iinfo->hostFileId = rootDentryAttr.hostFileId;
   }

   HgfsChangeFileAttributes(tempRootDentry->d_inode, &rootDentryAttr);
   HgfsDentryAgeReset(tempRootDentry);
   tempRootDentry->d_op = &HgfsDentryOperations;

   *rootDentry = tempRootDentry;
   result = 0;

   LOG(6, (KERN_DEBUG "VMware hgfs: %s: finished\n", __func__));
exit:
   if (result) {
      iput(rootInode);
      dput(tempRootDentry);
      *rootDentry = NULL;
   }
   return result;
}
Esempio n. 11
0
static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct f2fs_sb_info *sbi;
	struct f2fs_super_block *raw_super;
	struct buffer_head *raw_super_buf;
	struct inode *root;
	long err = -EINVAL;
	int i;

	/* allocate memory for f2fs-specific super block info */
	sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;

	/* set a block size */
	if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
		f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
		goto free_sbi;
	}

	err = read_raw_super_block(sb, &raw_super, &raw_super_buf);
	if (err)
		goto free_sbi;

	sb->s_fs_info = sbi;
	/* init some FS parameters */
	sbi->active_logs = NR_CURSEG_TYPE;

	set_opt(sbi, BG_GC);

#ifdef CONFIG_F2FS_FS_XATTR
	set_opt(sbi, XATTR_USER);
#endif
#ifdef CONFIG_F2FS_FS_POSIX_ACL
	set_opt(sbi, POSIX_ACL);
#endif
	/* parse mount options */
	err = parse_options(sb, (char *)data);
	if (err)
		goto free_sb_buf;

	sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
//	sb->s_max_links = F2FS_LINK_MAX;
	get_random_bytes(&sbi->s_next_generation, sizeof(u32));

	sb->s_op = &f2fs_sops;
	sb->s_xattr = f2fs_xattr_handlers;
	sb->s_export_op = &f2fs_export_ops;
	sb->s_magic = F2FS_SUPER_MAGIC;
	sb->s_time_gran = 1;
	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
		(test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
	memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));

	/* init f2fs-specific super block info */
	sbi->sb = sb;
	sbi->raw_super = raw_super;
	sbi->raw_super_buf = raw_super_buf;
	mutex_init(&sbi->gc_mutex);
	mutex_init(&sbi->writepages);
	mutex_init(&sbi->cp_mutex);
	mutex_init(&sbi->node_write);
	sbi->por_doing = false;
	spin_lock_init(&sbi->stat_lock);

	init_rwsem(&sbi->read_io.io_rwsem);
	sbi->read_io.sbi = sbi;
	sbi->read_io.bio = NULL;
	for (i = 0; i < NR_PAGE_TYPE; i++) {
		init_rwsem(&sbi->write_io[i].io_rwsem);
		sbi->write_io[i].sbi = sbi;
		sbi->write_io[i].bio = NULL;
	}

	init_rwsem(&sbi->cp_rwsem);
	init_waitqueue_head(&sbi->cp_wait);
	init_sb_info(sbi);

	/* get an inode for meta space */
	sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
	if (IS_ERR(sbi->meta_inode)) {
		f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
		err = PTR_ERR(sbi->meta_inode);
		goto free_sb_buf;
	}

	err = get_valid_checkpoint(sbi);
	if (err) {
		f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
		goto free_meta_inode;
	}

	/* sanity checking of checkpoint */
	err = -EINVAL;
	if (sanity_check_ckpt(sbi)) {
		f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
		goto free_cp;
	}

	sbi->total_valid_node_count =
				le32_to_cpu(sbi->ckpt->valid_node_count);
	sbi->total_valid_inode_count =
				le32_to_cpu(sbi->ckpt->valid_inode_count);
	sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
	sbi->total_valid_block_count =
				le64_to_cpu(sbi->ckpt->valid_block_count);
	sbi->last_valid_block_count = sbi->total_valid_block_count;
	sbi->alloc_valid_block_count = 0;
	INIT_LIST_HEAD(&sbi->dir_inode_list);
	spin_lock_init(&sbi->dir_inode_lock);

	init_orphan_info(sbi);

	/* setup f2fs internal modules */
	err = build_segment_manager(sbi);
	if (err) {
		f2fs_msg(sb, KERN_ERR,
			"Failed to initialize F2FS segment manager");
		goto free_sm;
	}
	err = build_node_manager(sbi);
	if (err) {
		f2fs_msg(sb, KERN_ERR,
			"Failed to initialize F2FS node manager");
		goto free_nm;
	}

	build_gc_manager(sbi);

	/* get an inode for node space */
	sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
	if (IS_ERR(sbi->node_inode)) {
		f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
		err = PTR_ERR(sbi->node_inode);
		goto free_nm;
	}

	/* if there are nt orphan nodes free them */
	recover_orphan_inodes(sbi);

	/* read root inode and dentry */
	root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
	if (IS_ERR(root)) {
		f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
		err = PTR_ERR(root);
		goto free_node_inode;
	}
	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
		err = -EINVAL;
		goto free_root_inode;
	}

	sb->s_root = d_alloc_root(root); /* allocate root dentry */
	if (!sb->s_root) {
		err = -ENOMEM;
		goto free_root_inode;
	}

	err = f2fs_build_stats(sbi);
	if (err)
		goto free_root_inode;

	if (f2fs_proc_root)
		sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);

	if (sbi->s_proc)
		proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
				 &f2fs_seq_segment_info_fops, sb);

	if (test_opt(sbi, DISCARD)) {
		struct request_queue *q = bdev_get_queue(sb->s_bdev);
		if (!blk_queue_discard(q))
			f2fs_msg(sb, KERN_WARNING,
					"mounting with \"discard\" option, but "
					"the device does not support discard");
	}

	sbi->s_kobj.kset = f2fs_kset;
	init_completion(&sbi->s_kobj_unregister);
	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
							"%s", sb->s_id);
	if (err)
		goto free_proc;

	/* recover fsynced data */
	if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
		err = recover_fsync_data(sbi);
		if (err)
			f2fs_msg(sb, KERN_ERR,
				"Cannot recover all fsync data errno=%ld", err);
	}

	/*
	 * If filesystem is not mounted as read-only then
	 * do start the gc_thread.
	 */
	if (!(sb->s_flags & MS_RDONLY)) {
		/* After POR, we can run background GC thread.*/
		err = start_gc_thread(sbi);
		if (err)
			goto free_kobj;
	}
	return 0;

free_kobj:
	kobject_del(&sbi->s_kobj);
free_proc:
	if (sbi->s_proc) {
		remove_proc_entry("segment_info", sbi->s_proc);
		remove_proc_entry(sb->s_id, f2fs_proc_root);
	}
	f2fs_destroy_stats(sbi);
free_root_inode:
	dput(sb->s_root);
	sb->s_root = NULL;
free_node_inode:
	iput(sbi->node_inode);
free_nm:
	destroy_node_manager(sbi);
free_sm:
	destroy_segment_manager(sbi);
free_cp:
	kfree(sbi->ckpt);
free_meta_inode:
	make_bad_inode(sbi->meta_inode);
	iput(sbi->meta_inode);
free_sb_buf:
	brelse(raw_super_buf);
free_sbi:
	kfree(sbi);
	return err;
}
Esempio n. 12
0
static int
cifs_read_super(struct super_block *sb, void *data,
                const char *devname, int silent)
{
    struct inode *inode;
    struct cifs_sb_info *cifs_sb;
    int rc = 0;

    /* BB should we make this contingent on mount parm? */
    sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
    sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
    cifs_sb = CIFS_SB(sb);
    if (cifs_sb == NULL)
        return -ENOMEM;

    rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
    if (rc) {
        kfree(cifs_sb);
        return rc;
    }

#ifdef CONFIG_CIFS_DFS_UPCALL
    /* copy mount params to sb for use in submounts */
    /* BB: should we move this after the mount so we
     * do not have to do the copy on failed mounts?
     * BB: May be it is better to do simple copy before
     * complex operation (mount), and in case of fail
     * just exit instead of doing mount and attempting
     * undo it if this copy fails?*/
    if (data) {
        int len = strlen(data);
        cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
        if (cifs_sb->mountdata == NULL) {
            bdi_destroy(&cifs_sb->bdi);
            kfree(sb->s_fs_info);
            sb->s_fs_info = NULL;
            return -ENOMEM;
        }
        strncpy(cifs_sb->mountdata, data, len + 1);
        cifs_sb->mountdata[len] = '\0';
    }
#endif

    rc = cifs_mount(sb, cifs_sb, data, devname);

    if (rc) {
        if (!silent)
            cERROR(1, "cifs_mount failed w/return code = %d", rc);
        goto out_mount_failed;
    }

    sb->s_magic = CIFS_MAGIC_NUMBER;
    sb->s_op = &cifs_super_ops;
    sb->s_bdi = &cifs_sb->bdi;
    /*	if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
    	    sb->s_blocksize =
    		cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
    sb->s_blocksize = CIFS_MAX_MSGSIZE;
    sb->s_blocksize_bits = 14;	/* default 2**14 = CIFS_MAX_MSGSIZE */
    inode = cifs_root_iget(sb, ROOT_I);

    if (IS_ERR(inode)) {
        rc = PTR_ERR(inode);
        inode = NULL;
        goto out_no_root;
    }

    sb->s_root = d_alloc_root(inode);

    if (!sb->s_root) {
        rc = -ENOMEM;
        goto out_no_root;
    }

#ifdef CONFIG_CIFS_EXPERIMENTAL
    if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
        cFYI(1, "export ops supported");
        sb->s_export_op = &cifs_export_ops;
    }
#endif /* EXPERIMENTAL */

    return 0;

out_no_root:
    cERROR(1, "cifs_read_super: get root inode failed");
    if (inode)
        iput(inode);

    cifs_umount(sb, cifs_sb);

out_mount_failed:
    if (cifs_sb) {
#ifdef CONFIG_CIFS_DFS_UPCALL
        if (cifs_sb->mountdata) {
            kfree(cifs_sb->mountdata);
            cifs_sb->mountdata = NULL;
        }
#endif
        unload_nls(cifs_sb->local_nls);
        bdi_destroy(&cifs_sb->bdi);
        kfree(cifs_sb);
    }
    return rc;
}
Esempio n. 13
0
static struct super_block * bfs_read_super(struct super_block * s, 
	void * data, int silent)
{
	kdev_t dev;
	struct buffer_head * bh;
	struct bfs_super_block * bfs_sb;
	struct inode * inode;
	int i, imap_len;

	dev = s->s_dev;
	set_blocksize(dev, BFS_BSIZE);
	s->s_blocksize = BFS_BSIZE;
	s->s_blocksize_bits = BFS_BSIZE_BITS;

	bh = sb_bread(s, 0);
	if(!bh)
		goto out;
	bfs_sb = (struct bfs_super_block *)bh->b_data;
	if (bfs_sb->s_magic != BFS_MAGIC) {
		if (!silent)
			printf("No BFS filesystem on %s (magic=%08x)\n", 
				bdevname(dev), bfs_sb->s_magic);
		goto out;
	}
	if (BFS_UNCLEAN(bfs_sb, s) && !silent)
		printf("%s is unclean, continuing\n", bdevname(dev));

	s->s_magic = BFS_MAGIC;
	s->su_bfs_sb = bfs_sb;
	s->su_sbh = bh;
	s->su_lasti = (bfs_sb->s_start - BFS_BSIZE)/sizeof(struct bfs_inode) 
			+ BFS_ROOT_INO - 1;

	imap_len = s->su_lasti/8 + 1;
	s->su_imap = kmalloc(imap_len, GFP_KERNEL);
	if (!s->su_imap)
		goto out;
	memset(s->su_imap, 0, imap_len);
	for (i=0; i<BFS_ROOT_INO; i++) 
		set_bit(i, s->su_imap);

	s->s_op = &bfs_sops;
	inode = iget(s, BFS_ROOT_INO);
	if (!inode) {
		kfree(s->su_imap);
		goto out;
	}
	s->s_root = d_alloc_root(inode);
	if (!s->s_root) {
		iput(inode);
		kfree(s->su_imap);
		goto out;
	}

	s->su_blocks = (bfs_sb->s_end + 1)>>BFS_BSIZE_BITS; /* for statfs(2) */
	s->su_freeb = (bfs_sb->s_end + 1 - bfs_sb->s_start)>>BFS_BSIZE_BITS;
	s->su_freei = 0;
	s->su_lf_eblk = 0;
	s->su_lf_sblk = 0;
	s->su_lf_ioff = 0;
	for (i=BFS_ROOT_INO; i<=s->su_lasti; i++) {
		inode = iget(s,i);
		if (inode->iu_dsk_ino == 0)
			s->su_freei++;
		else {
			set_bit(i, s->su_imap);
			s->su_freeb -= inode->i_blocks;
			if (inode->iu_eblock > s->su_lf_eblk) {
				s->su_lf_eblk = inode->iu_eblock;
				s->su_lf_sblk = inode->iu_sblock;
				s->su_lf_ioff = BFS_INO2OFF(i);
			}
		}
		iput(inode);
	}
	if (!(s->s_flags & MS_RDONLY)) {
		mark_buffer_dirty(bh);
		s->s_dirt = 1;
	} 
	dump_imap("read_super", s);
	return s;

out:
	brelse(bh);
	return NULL;
}
Esempio n. 14
0
static int affs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct affs_sb_info	*sbi;
	struct buffer_head	*root_bh = NULL;
	struct buffer_head	*boot_bh;
	struct inode		*root_inode = NULL;
	s32			 root_block;
	int			 size, blocksize;
	u32			 chksum;
	int			 num_bm;
	int			 i, j;
	s32			 key;
	uid_t			 uid;
	gid_t			 gid;
	int			 reserved;
	unsigned long		 mount_flags;
	int			 tmp_flags;	/* fix remount prototype... */
	u8			 sig[4];
	int			 ret = -EINVAL;

	save_mount_options(sb, data);

	pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options");

	sb->s_magic             = AFFS_SUPER_MAGIC;
	sb->s_op                = &affs_sops;
	sb->s_flags |= MS_NODIRATIME;

	sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;
	sb->s_fs_info = sbi;
	mutex_init(&sbi->s_bmlock);
	spin_lock_init(&sbi->symlink_lock);

	if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
				&blocksize,&sbi->s_prefix,
				sbi->s_volume, &mount_flags)) {
		printk(KERN_ERR "AFFS: Error parsing options\n");
		kfree(sbi->s_prefix);
		kfree(sbi);
		return -EINVAL;
	}
	/* N.B. after this point s_prefix must be released */

	sbi->s_flags   = mount_flags;
	sbi->s_mode    = i;
	sbi->s_uid     = uid;
	sbi->s_gid     = gid;
	sbi->s_reserved= reserved;

	/* Get the size of the device in 512-byte blocks.
	 * If we later see that the partition uses bigger
	 * blocks, we will have to change it.
	 */

	size = sb->s_bdev->bd_inode->i_size >> 9;
	pr_debug("AFFS: initial blocksize=%d, #blocks=%d\n", 512, size);

	affs_set_blocksize(sb, PAGE_SIZE);
	/* Try to find root block. Its location depends on the block size. */

	i = 512;
	j = 4096;
	if (blocksize > 0) {
		i = j = blocksize;
		size = size / (blocksize / 512);
	}
	for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) {
		sbi->s_root_block = root_block;
		if (root_block < 0)
			sbi->s_root_block = (reserved + size - 1) / 2;
		pr_debug("AFFS: setting blocksize to %d\n", blocksize);
		affs_set_blocksize(sb, blocksize);
		sbi->s_partition_size = size;

		/* The root block location that was calculated above is not
		 * correct if the partition size is an odd number of 512-
		 * byte blocks, which will be rounded down to a number of
		 * 1024-byte blocks, and if there were an even number of
		 * reserved blocks. Ideally, all partition checkers should
		 * report the real number of blocks of the real blocksize,
		 * but since this just cannot be done, we have to try to
		 * find the root block anyways. In the above case, it is one
		 * block behind the calculated one. So we check this one, too.
		 */
		for (num_bm = 0; num_bm < 2; num_bm++) {
			pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, "
				"size=%d, reserved=%d\n",
				sb->s_id,
				sbi->s_root_block + num_bm,
				blocksize, size, reserved);
			root_bh = affs_bread(sb, sbi->s_root_block + num_bm);
			if (!root_bh)
				continue;
			if (!affs_checksum_block(sb, root_bh) &&
			    be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT &&
			    be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) {
				sbi->s_hashsize    = blocksize / 4 - 56;
				sbi->s_root_block += num_bm;
				key                        = 1;
				goto got_root;
			}
			affs_brelse(root_bh);
			root_bh = NULL;
		}
	}
	if (!silent)
		printk(KERN_ERR "AFFS: No valid root block on device %s\n",
			sb->s_id);
	goto out_error;

	/* N.B. after this point bh must be released */
got_root:
	root_block = sbi->s_root_block;

	/* Find out which kind of FS we have */
	boot_bh = sb_bread(sb, 0);
	if (!boot_bh) {
		printk(KERN_ERR "AFFS: Cannot read boot block\n");
		goto out_error;
	}
	memcpy(sig, boot_bh->b_data, 4);
	brelse(boot_bh);
	chksum = be32_to_cpu(*(__be32 *)sig);

	/* Dircache filesystems are compatible with non-dircache ones
	 * when reading. As long as they aren't supported, writing is
	 * not recommended.
	 */
	if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS
	     || chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) {
		printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n",
			sb->s_id);
		sb->s_flags |= MS_RDONLY;
	}
	switch (chksum) {
		case MUFS_FS:
		case MUFS_INTLFFS:
		case MUFS_DCFFS:
			sbi->s_flags |= SF_MUFS;
			/* fall thru */
		case FS_INTLFFS:
		case FS_DCFFS:
			sbi->s_flags |= SF_INTL;
			break;
		case MUFS_FFS:
			sbi->s_flags |= SF_MUFS;
			break;
		case FS_FFS:
			break;
		case MUFS_OFS:
			sbi->s_flags |= SF_MUFS;
			/* fall thru */
		case FS_OFS:
			sbi->s_flags |= SF_OFS;
			sb->s_flags |= MS_NOEXEC;
			break;
		case MUFS_DCOFS:
		case MUFS_INTLOFS:
			sbi->s_flags |= SF_MUFS;
		case FS_DCOFS:
		case FS_INTLOFS:
			sbi->s_flags |= SF_INTL | SF_OFS;
			sb->s_flags |= MS_NOEXEC;
			break;
		default:
			printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n",
				sb->s_id, chksum);
			goto out_error;
	}

	if (mount_flags & SF_VERBOSE) {
		u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0];
		printk(KERN_NOTICE "AFFS: Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n",
			len > 31 ? 31 : len,
			AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1,
			sig, sig[3] + '0', blocksize);
	}

	sb->s_flags |= MS_NODEV | MS_NOSUID;

	sbi->s_data_blksize = sb->s_blocksize;
	if (sbi->s_flags & SF_OFS)
		sbi->s_data_blksize -= 24;

	/* Keep super block in cache */
	sbi->s_root_bh = root_bh;
	/* N.B. after this point s_root_bh must be released */

	tmp_flags = sb->s_flags;
	if (affs_init_bitmap(sb, &tmp_flags))
		goto out_error;
	sb->s_flags = tmp_flags;

	/* set up enough so that it can read an inode */

	root_inode = affs_iget(sb, root_block);
	if (IS_ERR(root_inode)) {
		ret = PTR_ERR(root_inode);
		goto out_error_noinode;
	}

	sb->s_root = d_alloc_root(root_inode);
	if (!sb->s_root) {
		printk(KERN_ERR "AFFS: Get root inode failed\n");
		goto out_error;
	}
	sb->s_root->d_op = &affs_dentry_operations;

	pr_debug("AFFS: s_flags=%lX\n",sb->s_flags);
	return 0;

	/*
	 * Begin the cascaded cleanup ...
	 */
out_error:
	if (root_inode)
		iput(root_inode);
out_error_noinode:
	kfree(sbi->s_bitmap);
	affs_brelse(root_bh);
	kfree(sbi->s_prefix);
	kfree(sbi);
	sb->s_fs_info = NULL;
	return ret;
}
Esempio n. 15
0
/* Called to mount a filesystem by read_super() in fs/super.c
 * Return a super block, the main structure of a filesystem
 *
 * NOTE : Don't store a pointer to an option, as the page containing the
 * options is freed after ntfs_read_super() returns.
 *
 * NOTE : A context switch can happen in kernel code only if the code blocks
 * (= calls schedule() in kernel/sched.c).
 */
struct super_block * ntfs_read_super(struct super_block *sb, 
				     void *options, int silent)
{
	ntfs_volume *vol;
	struct buffer_head *bh;
	int i;

	ntfs_debug(DEBUG_OTHER, "ntfs_read_super\n");

#ifdef NTFS_IN_LINUX_KERNEL
	vol = NTFS_SB2VOL(sb);
#else
	if(!(vol = ntfs_malloc(sizeof(ntfs_volume))))
		goto ntfs_read_super_dec;
	NTFS_SB2VOL(sb)=vol;
#endif
	
	if(!parse_options(vol,(char*)options))
		goto ntfs_read_super_vol;

#if 0
	/* Set to read only, user option might reset it */
	sb->s_flags |= MS_RDONLY;
#endif

	/* Assume a 512 bytes block device for now */
	set_blocksize(sb->s_dev, 512);
	/* Read the super block (boot block) */
	if(!(bh=bread(sb->s_dev,0,512))) {
		ntfs_error("Reading super block failed\n");
		goto ntfs_read_super_unl;
	}
	ntfs_debug(DEBUG_OTHER, "Done reading boot block\n");

	/* Check for 'NTFS' magic number */
	if(!IS_NTFS_VOLUME(bh->b_data)){
		ntfs_debug(DEBUG_OTHER, "Not a NTFS volume\n");
		brelse(bh);
		goto ntfs_read_super_unl;
	}

	ntfs_debug(DEBUG_OTHER, "Going to init volume\n");
	ntfs_init_volume(vol,bh->b_data);
	ntfs_debug(DEBUG_OTHER, "MFT record at cluster 0x%X\n",vol->mft_cluster);
	brelse(bh);
	NTFS_SB(vol)=sb;
	ntfs_debug(DEBUG_OTHER, "Done to init volume\n");

	/* Inform the kernel that a device block is a NTFS cluster */
	sb->s_blocksize=vol->clustersize;
	for(i=sb->s_blocksize,sb->s_blocksize_bits=0;i != 1;i>>=1)
		sb->s_blocksize_bits++;
	set_blocksize(sb->s_dev,sb->s_blocksize);
	ntfs_debug(DEBUG_OTHER, "set_blocksize\n");

	/* Allocate a MFT record (MFT record can be smaller than a cluster) */
	if(!(vol->mft=ntfs_malloc(max(vol->mft_recordsize,vol->clustersize))))
		goto ntfs_read_super_unl;

	/* Read at least the MFT record for $MFT */
	for(i=0;i<max(vol->mft_clusters_per_record,1);i++){
		if(!(bh=bread(sb->s_dev,vol->mft_cluster+i,vol->clustersize))) {
			ntfs_error("Could not read MFT record 0\n");
			goto ntfs_read_super_mft;
		}
		ntfs_memcpy(vol->mft+i*vol->clustersize,bh->b_data,vol->clustersize);
		brelse(bh);
		ntfs_debug(DEBUG_OTHER, "Read cluster %x\n",vol->mft_cluster+i);
	}

	/* Check and fixup this MFT record */
	if(!ntfs_check_mft_record(vol,vol->mft)){
		ntfs_error("Invalid MFT record 0\n");
		goto ntfs_read_super_mft;
	}

	/* Inform the kernel about which super operations are available */
	sb->s_op = &ntfs_super_operations;
	sb->s_magic = NTFS_SUPER_MAGIC;
	
	ntfs_debug(DEBUG_OTHER, "Reading special files\n");
	if(ntfs_load_special_files(vol)){
		ntfs_error("Error loading special files\n");
		goto ntfs_read_super_mft;
	}

	ntfs_debug(DEBUG_OTHER, "Getting RootDir\n");
	/* Get the root directory */
	if(!(sb->s_root=d_alloc_root(iget(sb,FILE_ROOT)))){
		ntfs_error("Could not get root dir inode\n");
		goto ntfs_read_super_mft;
	}
	ntfs_debug(DEBUG_OTHER, "read_super: done\n");
	return sb;

ntfs_read_super_mft:
	ntfs_free(vol->mft);
ntfs_read_super_unl:
ntfs_read_super_vol:
	#ifndef NTFS_IN_LINUX_KERNEL
	ntfs_free(vol);
ntfs_read_super_dec:
	#endif
	ntfs_debug(DEBUG_OTHER, "read_super: done\n");
	return NULL;
}
Esempio n. 16
0
static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
		       const char *dev_name, void *data,
		       struct vfsmount *mnt)
{
	struct super_block *sb = NULL;
	struct v9fs_fcall *fcall = NULL;
	struct inode *inode = NULL;
	struct dentry *root = NULL;
	struct v9fs_session_info *v9ses = NULL;
	struct v9fs_fid *root_fid = NULL;
	int mode = S_IRWXUGO | S_ISVTX;
	uid_t uid = current->fsuid;
	gid_t gid = current->fsgid;
	int stat_result = 0;
	int newfid = 0;
	int retval = 0;

	dprintk(DEBUG_VFS, " \n");

	v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
	if (!v9ses)
		return -ENOMEM;

	if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
		dprintk(DEBUG_ERROR, "problem initiating session\n");
		retval = newfid;
		goto out_free_session;
	}

	sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
	if (IS_ERR(sb)) {
		retval = PTR_ERR(sb);
		goto out_close_session;
	}
	v9fs_fill_super(sb, v9ses, flags);

	inode = v9fs_get_inode(sb, S_IFDIR | mode);
	if (IS_ERR(inode)) {
		retval = PTR_ERR(inode);
		goto put_back_sb;
	}

	inode->i_uid = uid;
	inode->i_gid = gid;

	root = d_alloc_root(inode);
	if (!root) {
		retval = -ENOMEM;
		goto put_back_sb;
	}

	sb->s_root = root;

	stat_result = v9fs_t_stat(v9ses, newfid, &fcall);
	if (stat_result < 0) {
		dprintk(DEBUG_ERROR, "stat error\n");
		v9fs_t_clunk(v9ses, newfid);
	} else {
		/* Setup the Root Inode */
		root_fid = v9fs_fid_create(v9ses, newfid);
		if (root_fid == NULL) {
			retval = -ENOMEM;
			goto put_back_sb;
		}

		retval = v9fs_fid_insert(root_fid, root);
		if (retval < 0) {
			kfree(fcall);
			goto put_back_sb;
		}

		root_fid->qid = fcall->params.rstat.stat.qid;
		root->d_inode->i_ino =
		    v9fs_qid2ino(&fcall->params.rstat.stat.qid);
		v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb);
	}

	kfree(fcall);

	if (stat_result < 0) {
		retval = stat_result;
		goto put_back_sb;
	}

	return simple_set_mnt(mnt, sb);

out_close_session:
	v9fs_session_close(v9ses);
out_free_session:
	kfree(v9ses);
	return retval;

put_back_sb:
	/* deactivate_super calls v9fs_kill_super which will frees the rest */
	up_write(&sb->s_umount);
	deactivate_super(sb);
	return retval;
}
Esempio n. 17
0
static int qnx4_fill_super(struct super_block *s, void *data, int silent)
{
	struct buffer_head *bh;
	struct inode *root;
	const char *errmsg;
	struct qnx4_sb_info *qs;
	int ret = -EINVAL;

	qs = kzalloc(sizeof(struct qnx4_sb_info), GFP_KERNEL);
	if (!qs)
		return -ENOMEM;
	s->s_fs_info = qs;

	sb_set_blocksize(s, QNX4_BLOCK_SIZE);

	/* Check the superblock signature. Since the qnx4 code is
	   dangerous, we should leave as quickly as possible
	   if we don't belong here... */
	bh = sb_bread(s, 1);
	if (!bh) {
		printk("qnx4: unable to read the superblock\n");
		goto outnobh;
	}
	if ( le32_to_cpup((__le32*) bh->b_data) != QNX4_SUPER_MAGIC ) {
		if (!silent)
			printk("qnx4: wrong fsid in superblock.\n");
		goto out;
	}
	s->s_op = &qnx4_sops;
	s->s_magic = QNX4_SUPER_MAGIC;
#ifndef CONFIG_QNX4FS_RW
	s->s_flags |= MS_RDONLY;	/* Yup, read-only yet */
#endif
	qnx4_sb(s)->sb_buf = bh;
	qnx4_sb(s)->sb = (struct qnx4_super_block *) bh->b_data;


 	/* check before allocating dentries, inodes, .. */
	errmsg = qnx4_checkroot(s);
	if (errmsg != NULL) {
 		if (!silent)
 			printk("qnx4: %s\n", errmsg);
		goto out;
	}

 	/* does root not have inode number QNX4_ROOT_INO ?? */
	root = qnx4_iget(s, QNX4_ROOT_INO * QNX4_INODES_PER_BLOCK);
	if (IS_ERR(root)) {
 		printk("qnx4: get inode failed\n");
		ret = PTR_ERR(root);
 		goto out;
 	}

	ret = -ENOMEM;
 	s->s_root = d_alloc_root(root);
 	if (s->s_root == NULL)
 		goto outi;

	brelse(bh);

	return 0;

      outi:
	iput(root);
      out:
	brelse(bh);
      outnobh:
	kfree(qs);
	s->s_fs_info = NULL;
	return ret;
}
Esempio n. 18
0
static int efs_fill_super(struct super_block *s, void *d, int silent)
{
	struct efs_sb_info *sb;
	struct buffer_head *bh;
	struct inode *root;

 	sb = kmalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
	if (!sb)
		return -ENOMEM;
	s->s_fs_info = sb;
	memset(sb, 0, sizeof(struct efs_sb_info));
 
	s->s_magic		= EFS_SUPER_MAGIC;
	if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
		printk(KERN_ERR "EFS: device does not support %d byte blocks\n",
			EFS_BLOCKSIZE);
		goto out_no_fs_ul;
	}
  
	/* read the vh (volume header) block */
	bh = sb_bread(s, 0);

	if (!bh) {
		printk(KERN_ERR "EFS: cannot read volume header\n");
		goto out_no_fs_ul;
	}

	/*
	 * if this returns zero then we didn't find any partition table.
	 * this isn't (yet) an error - just assume for the moment that
	 * the device is valid and go on to search for a superblock.
	 */
	sb->fs_start = efs_validate_vh((struct volume_header *) bh->b_data);
	brelse(bh);

	if (sb->fs_start == -1) {
		goto out_no_fs_ul;
	}

	bh = sb_bread(s, sb->fs_start + EFS_SUPER);
	if (!bh) {
		printk(KERN_ERR "EFS: cannot read superblock\n");
		goto out_no_fs_ul;
	}
		
	if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
#ifdef DEBUG
		printk(KERN_WARNING "EFS: invalid superblock at block %u\n", sb->fs_start + EFS_SUPER);
#endif
		brelse(bh);
		goto out_no_fs_ul;
	}
	brelse(bh);

	if (!(s->s_flags & MS_RDONLY)) {
#ifdef DEBUG
		printk(KERN_INFO "EFS: forcing read-only mode\n");
#endif
		s->s_flags |= MS_RDONLY;
	}
	s->s_op   = &efs_superblock_operations;
	s->s_export_op = &efs_export_ops;
	root = iget(s, EFS_ROOTINODE);
	s->s_root = d_alloc_root(root);
 
	if (!(s->s_root)) {
		printk(KERN_ERR "EFS: get root inode failed\n");
		iput(root);
		goto out_no_fs;
	}

	return 0;

out_no_fs_ul:
out_no_fs:
	s->s_fs_info = NULL;
	kfree(sb);
	return -EINVAL;
}
Esempio n. 19
0
File: inode.c Progetto: nhanh0/hah
static struct super_block * coda_read_super(struct super_block *sb, 
					    void *data, int silent)
{
        struct inode *root = 0; 
	struct coda_sb_info *sbi = NULL;
	struct venus_comm *vc = NULL;
        ViceFid fid;
        int error;
	int idx;

	idx = get_device_index((struct coda_mount_data *) data);

	/* Ignore errors in data, for backward compatibility */
	if(idx == -1)
		idx = 0;
	
	printk(KERN_INFO "coda_read_super: device index: %i\n", idx);

	vc = &coda_comms[idx];
	if (!vc->vc_inuse) {
		printk("coda_read_super: No pseudo device\n");
		return NULL;
	}

        if ( vc->vc_sb ) {
		printk("coda_read_super: Device already mounted\n");
		return NULL;
	}

	sbi = kmalloc(sizeof(struct coda_sb_info), GFP_KERNEL);
	if(!sbi) {
		return NULL;
	}

	vc->vc_sb = sb;

	sbi->sbi_sb = sb;
	sbi->sbi_vcomm = vc;
	INIT_LIST_HEAD(&sbi->sbi_cihead);

        sb->u.generic_sbp = sbi;
        sb->s_blocksize = 1024;	/* XXXXX  what do we put here?? */
        sb->s_blocksize_bits = 10;
        sb->s_magic = CODA_SUPER_MAGIC;
        sb->s_op = &coda_super_operations;

	/* get root fid from Venus: this needs the root inode */
	error = venus_rootfid(sb, &fid);
	if ( error ) {
	        printk("coda_read_super: coda_get_rootfid failed with %d\n",
		       error);
		goto error;
	}	  
	printk("coda_read_super: rootfid is %s\n", coda_f2s(&fid));
	
	/* make root inode */
        error = coda_cnode_make(&root, &fid, sb);
        if ( error || !root ) {
	    printk("Failure of coda_cnode_make for root: error %d\n", error);
	    goto error;
	} 

	printk("coda_read_super: rootinode is %ld dev %d\n", 
	       root->i_ino, root->i_dev);
	sb->s_root = d_alloc_root(root);
        return sb;

 error:
	if (sbi) {
		kfree(sbi);
		if(vc)
			vc->vc_sb = NULL;		
	}
	if (root)
                iput(root);

        return NULL;
}
Esempio n. 20
0
int autofs4_fill_super(struct super_block *s, void *data, int silent)
{
	struct inode * root_inode;
	struct dentry * root;
	struct file * pipe;
	int pipefd;
	struct autofs_sb_info *sbi;
	struct autofs_info *ino;

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi)
		goto fail_unlock;
	DPRINTK("starting up, sbi = %p",sbi);

	s->s_fs_info = sbi;
	sbi->magic = AUTOFS_SBI_MAGIC;
	sbi->pipefd = -1;
	sbi->pipe = NULL;
	sbi->catatonic = 1;
	sbi->exp_timeout = 0;
	sbi->oz_pgrp = task_pgrp_nr(current);
	sbi->sb = s;
	sbi->version = 0;
	sbi->sub_version = 0;
	set_autofs_type_indirect(&sbi->type);
	sbi->min_proto = 0;
	sbi->max_proto = 0;
	mutex_init(&sbi->wq_mutex);
	spin_lock_init(&sbi->fs_lock);
	sbi->queues = NULL;
	spin_lock_init(&sbi->lookup_lock);
	INIT_LIST_HEAD(&sbi->active_list);
	INIT_LIST_HEAD(&sbi->expiring_list);
	s->s_blocksize = 1024;
	s->s_blocksize_bits = 10;
	s->s_magic = AUTOFS_SUPER_MAGIC;
	s->s_op = &autofs4_sops;
	s->s_time_gran = 1;

	/*
	 * Get the root inode and dentry, but defer checking for errors.
	 */
	ino = autofs4_mkroot(sbi);
	if (!ino)
		goto fail_free;
	root_inode = autofs4_get_inode(s, ino);
	if (!root_inode)
		goto fail_ino;

	root = d_alloc_root(root_inode);
	if (!root)
		goto fail_iput;
	pipe = NULL;

	root->d_op = &autofs4_sb_dentry_operations;
	root->d_fsdata = ino;

	/* Can this call block? */
	if (parse_options(data, &pipefd, &root_inode->i_uid, &root_inode->i_gid,
				&sbi->oz_pgrp, &sbi->type, &sbi->min_proto,
				&sbi->max_proto)) {
		printk("autofs: called with bogus options\n");
		goto fail_dput;
	}

	root_inode->i_fop = &autofs4_root_operations;
	root_inode->i_op = autofs_type_trigger(sbi->type) ?
			&autofs4_direct_root_inode_operations :
			&autofs4_indirect_root_inode_operations;

	/* Couldn't this be tested earlier? */
	if (sbi->max_proto < AUTOFS_MIN_PROTO_VERSION ||
	    sbi->min_proto > AUTOFS_MAX_PROTO_VERSION) {
		printk("autofs: kernel does not match daemon version "
		       "daemon (%d, %d) kernel (%d, %d)\n",
			sbi->min_proto, sbi->max_proto,
			AUTOFS_MIN_PROTO_VERSION, AUTOFS_MAX_PROTO_VERSION);
		goto fail_dput;
	}

	/* Establish highest kernel protocol version */
	if (sbi->max_proto > AUTOFS_MAX_PROTO_VERSION)
		sbi->version = AUTOFS_MAX_PROTO_VERSION;
	else
		sbi->version = sbi->max_proto;
	sbi->sub_version = AUTOFS_PROTO_SUBVERSION;

	DPRINTK("pipe fd = %d, pgrp = %u", pipefd, sbi->oz_pgrp);
	pipe = fget(pipefd);
	
	if (!pipe) {
		printk("autofs: could not open pipe file descriptor\n");
		goto fail_dput;
	}
	if (!pipe->f_op || !pipe->f_op->write)
		goto fail_fput;
	sbi->pipe = pipe;
	sbi->pipefd = pipefd;
	sbi->catatonic = 0;

	/*
	 * Success! Install the root dentry now to indicate completion.
	 */
	s->s_root = root;
	return 0;
	
	/*
	 * Failure ... clean up.
	 */
fail_fput:
	printk("autofs: pipe file descriptor does not contain proper ops\n");
	fput(pipe);
	/* fall through */
fail_dput:
	dput(root);
	goto fail_free;
fail_iput:
	printk("autofs: get root dentry failed\n");
	iput(root_inode);
fail_ino:
	kfree(ino);
fail_free:
	kfree(sbi);
	s->s_fs_info = NULL;
fail_unlock:
	return -EINVAL;
}
Esempio n. 21
0
static int hpfs_fill_super(struct super_block *s, void *options, int silent)
{
	struct buffer_head *bh0, *bh1, *bh2;
	struct hpfs_boot_block *bootblock;
	struct hpfs_super_block *superblock;
	struct hpfs_spare_block *spareblock;
	struct hpfs_sb_info *sbi;
	struct inode *root;

	uid_t uid;
	gid_t gid;
	umode_t umask;
	int lowercase, eas, chk, errs, chkdsk, timeshift;

	dnode_secno root_dno;
	struct hpfs_dirent *de = NULL;
	struct quad_buffer_head qbh;

	int o;

	save_mount_options(s, options);

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi) {
		return -ENOMEM;
	}
	s->s_fs_info = sbi;

	sbi->sb_bmp_dir = NULL;
	sbi->sb_cp_table = NULL;

	mutex_init(&sbi->hpfs_mutex);
	hpfs_lock(s);

	uid = current_uid();
	gid = current_gid();
	umask = current_umask();
	lowercase = 0;
	eas = 2;
	chk = 1;
	errs = 1;
	chkdsk = 1;
	timeshift = 0;

	if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
	    &eas, &chk, &errs, &chkdsk, &timeshift))) {
		printk("HPFS: bad mount options.\n");
		goto bail0;
	}
	if (o==2) {
		hpfs_help();
		goto bail0;
	}

	/*sbi->sb_mounting = 1;*/
	sb_set_blocksize(s, 512);
	sbi->sb_fs_size = -1;
	if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
	if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
	if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;

	/* Check magics */
	if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC
	    ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC
	    || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
		if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
		goto bail4;
	}

	/* Check version */
	if (!(s->s_flags & MS_RDONLY) &&
	      superblock->funcversion != 2 && superblock->funcversion != 3) {
		printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
			(int)superblock->version, (int)superblock->funcversion);
		printk("HPFS: please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - [email protected]\n");
		goto bail4;
	}

	s->s_flags |= MS_NOATIME;

	/* Fill superblock stuff */
	s->s_magic = HPFS_SUPER_MAGIC;
	s->s_op = &hpfs_sops;
	s->s_d_op = &hpfs_dentry_operations;

	sbi->sb_root = le32_to_cpu(superblock->root);
	sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
	sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
	sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
	sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
	sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
	sbi->sb_uid = uid;
	sbi->sb_gid = gid;
	sbi->sb_mode = 0777 & ~umask;
	sbi->sb_n_free = -1;
	sbi->sb_n_free_dnodes = -1;
	sbi->sb_lowercase = lowercase;
	sbi->sb_eas = eas;
	sbi->sb_chk = chk;
	sbi->sb_chkdsk = chkdsk;
	sbi->sb_err = errs;
	sbi->sb_timeshift = timeshift;
	sbi->sb_was_error = 0;
	sbi->sb_cp_table = NULL;
	sbi->sb_c_bitmap = -1;
	sbi->sb_max_fwd_alloc = 0xffffff;

	if (sbi->sb_fs_size >= 0x80000000) {
		hpfs_error(s, "invalid size in superblock: %08x",
			(unsigned)sbi->sb_fs_size);
		goto bail4;
	}
	
	/* Load bitmap directory */
	if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
		goto bail4;
	
	/* Check for general fs errors*/
	if (spareblock->dirty && !spareblock->old_wrote) {
		if (errs == 2) {
			printk("HPFS: Improperly stopped, not mounted\n");
			goto bail4;
		}
		hpfs_error(s, "improperly stopped");
	}

	if (!(s->s_flags & MS_RDONLY)) {
		spareblock->dirty = 1;
		spareblock->old_wrote = 0;
		mark_buffer_dirty(bh2);
	}

	if (le32_to_cpu(spareblock->hotfixes_used) || le32_to_cpu(spareblock->n_spares_used)) {
		if (errs >= 2) {
			printk("HPFS: Hotfixes not supported here, try chkdsk\n");
			mark_dirty(s, 0);
			goto bail4;
		}
		hpfs_error(s, "hotfixes not supported here, try chkdsk");
		if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
		else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
	}
	if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
		if (errs >= 2) {
			printk("HPFS: Spare dnodes used, try chkdsk\n");
			mark_dirty(s, 0);
			goto bail4;
		}
		hpfs_error(s, "warning: spare dnodes used, try chkdsk");
		if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
	}
	if (chk) {
		unsigned a;
		if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
		    le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
			hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
				le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
			goto bail4;
		}
		a = sbi->sb_dirband_size;
		sbi->sb_dirband_size = 0;
		if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
		    hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
		    hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
			mark_dirty(s, 0);
			goto bail4;
		}
		sbi->sb_dirband_size = a;
	} else printk("HPFS: You really don't want any checks? You are crazy...\n");

	/* Load code page table */
	if (le32_to_cpu(spareblock->n_code_pages))
		if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
			printk("HPFS: Warning: code page support is disabled\n");

	brelse(bh2);
	brelse(bh1);
	brelse(bh0);

	root = iget_locked(s, sbi->sb_root);
	if (!root)
		goto bail0;
	hpfs_init_inode(root);
	hpfs_read_inode(root);
	unlock_new_inode(root);
	s->s_root = d_alloc_root(root);
	if (!s->s_root) {
		iput(root);
		goto bail0;
	}

	/*
	 * find the root directory's . pointer & finish filling in the inode
	 */

	root_dno = hpfs_fnode_dno(s, sbi->sb_root);
	if (root_dno)
		de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
	if (!de)
		hpfs_error(s, "unable to find root dir");
	else {
		root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
		root->i_atime.tv_nsec = 0;
		root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
		root->i_mtime.tv_nsec = 0;
		root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
		root->i_ctime.tv_nsec = 0;
		hpfs_i(root)->i_ea_size = le16_to_cpu(de->ea_size);
		hpfs_i(root)->i_parent_dir = root->i_ino;
		if (root->i_size == -1)
			root->i_size = 2048;
		if (root->i_blocks == -1)
			root->i_blocks = 5;
		hpfs_brelse4(&qbh);
	}
	hpfs_unlock(s);
	return 0;

bail4:	brelse(bh2);
bail3:	brelse(bh1);
bail2:	brelse(bh0);
bail1:
bail0:
	hpfs_unlock(s);
	kfree(sbi->sb_bmp_dir);
	kfree(sbi->sb_cp_table);
	s->s_fs_info = NULL;
	kfree(sbi);
	return -EINVAL;
}
Esempio n. 22
0
static int minix_fill_super(struct super_block *s, void *data, int silent)
{
	struct buffer_head *bh;
	struct buffer_head **map;
	struct minix_super_block *ms;
	struct minix3_super_block *m3s = NULL;
	unsigned long i, block;
	struct inode *root_inode;
	struct minix_sb_info *sbi;
	int ret = -EINVAL;

	sbi = kzalloc(sizeof(struct minix_sb_info), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;
	s->s_fs_info = sbi;

	BUILD_BUG_ON(32 != sizeof (struct minix_inode));
	BUILD_BUG_ON(64 != sizeof(struct minix2_inode));

	if (!sb_set_blocksize(s, BLOCK_SIZE))
		goto out_bad_hblock;

	if (!(bh = sb_bread(s, 1)))
		goto out_bad_sb;

	ms = (struct minix_super_block *) bh->b_data;
	sbi->s_ms = ms;
	sbi->s_sbh = bh;
	sbi->s_mount_state = ms->s_state;
	sbi->s_ninodes = ms->s_ninodes;
	sbi->s_nzones = ms->s_nzones;
	sbi->s_imap_blocks = ms->s_imap_blocks;
	sbi->s_zmap_blocks = ms->s_zmap_blocks;
	sbi->s_firstdatazone = ms->s_firstdatazone;
	sbi->s_log_zone_size = ms->s_log_zone_size;
	sbi->s_max_size = ms->s_max_size;
	s->s_magic = ms->s_magic;
	if (s->s_magic == MINIX_SUPER_MAGIC) {
		sbi->s_version = MINIX_V1;
		sbi->s_dirsize = 16;
		sbi->s_namelen = 14;
		sbi->s_link_max = MINIX_LINK_MAX;
	} else if (s->s_magic == MINIX_SUPER_MAGIC2) {
		sbi->s_version = MINIX_V1;
		sbi->s_dirsize = 32;
		sbi->s_namelen = 30;
		sbi->s_link_max = MINIX_LINK_MAX;
	} else if (s->s_magic == MINIX2_SUPER_MAGIC) {
		sbi->s_version = MINIX_V2;
		sbi->s_nzones = ms->s_zones;
		sbi->s_dirsize = 16;
		sbi->s_namelen = 14;
		sbi->s_link_max = MINIX2_LINK_MAX;
	} else if (s->s_magic == MINIX2_SUPER_MAGIC2) {
		sbi->s_version = MINIX_V2;
		sbi->s_nzones = ms->s_zones;
		sbi->s_dirsize = 32;
		sbi->s_namelen = 30;
		sbi->s_link_max = MINIX2_LINK_MAX;
	} else if ( *(__u16 *)(bh->b_data + 24) == MINIX3_SUPER_MAGIC) {
		m3s = (struct minix3_super_block *) bh->b_data;
		s->s_magic = m3s->s_magic;
		sbi->s_imap_blocks = m3s->s_imap_blocks;
		sbi->s_zmap_blocks = m3s->s_zmap_blocks;
		sbi->s_firstdatazone = m3s->s_firstdatazone;
		sbi->s_log_zone_size = m3s->s_log_zone_size;
		sbi->s_max_size = m3s->s_max_size;
		sbi->s_ninodes = m3s->s_ninodes;
		sbi->s_nzones = m3s->s_zones;
		sbi->s_dirsize = 64;
		sbi->s_namelen = 60;
		sbi->s_version = MINIX_V3;
		sbi->s_link_max = MINIX2_LINK_MAX;
		sbi->s_mount_state = MINIX_VALID_FS;
		sb_set_blocksize(s, m3s->s_blocksize);
	} else
		goto out_no_fs;

	/*
	 * Allocate the buffer map to keep the superblock small.
	 */
	if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0)
		goto out_illegal_sb;
	i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh);
	map = kzalloc(i, GFP_KERNEL);
	if (!map)
		goto out_no_map;
	sbi->s_imap = &map[0];
	sbi->s_zmap = &map[sbi->s_imap_blocks];

	block=2;
	for (i=0 ; i < sbi->s_imap_blocks ; i++) {
		if (!(sbi->s_imap[i]=sb_bread(s, block)))
			goto out_no_bitmap;
		block++;
	}
	for (i=0 ; i < sbi->s_zmap_blocks ; i++) {
		if (!(sbi->s_zmap[i]=sb_bread(s, block)))
			goto out_no_bitmap;
		block++;
	}

	minix_set_bit(0,sbi->s_imap[0]->b_data);
	minix_set_bit(0,sbi->s_zmap[0]->b_data);

	/* set up enough so that it can read an inode */
	s->s_op = &minix_sops;
	root_inode = minix_iget(s, MINIX_ROOT_INO);
	if (IS_ERR(root_inode)) {
		ret = PTR_ERR(root_inode);
		goto out_no_root;
	}

	ret = -ENOMEM;
	s->s_root = d_alloc_root(root_inode);
	if (!s->s_root)
		goto out_iput;

	if (!(s->s_flags & MS_RDONLY)) {
		if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
			ms->s_state &= ~MINIX_VALID_FS;
		mark_buffer_dirty(bh);
	}
	if (!(sbi->s_mount_state & MINIX_VALID_FS))
		printk("MINIX-fs: mounting unchecked file system, "
			"running fsck is recommended\n");
 	else if (sbi->s_mount_state & MINIX_ERROR_FS)
		printk("MINIX-fs: mounting file system with errors, "
			"running fsck is recommended\n");
	return 0;

out_iput:
	iput(root_inode);
	goto out_freemap;

out_no_root:
	if (!silent)
		printk("MINIX-fs: get root inode failed\n");
	goto out_freemap;

out_no_bitmap:
	printk("MINIX-fs: bad superblock or unable to read bitmaps\n");
out_freemap:
	for (i = 0; i < sbi->s_imap_blocks; i++)
		brelse(sbi->s_imap[i]);
	for (i = 0; i < sbi->s_zmap_blocks; i++)
		brelse(sbi->s_zmap[i]);
	kfree(sbi->s_imap);
	goto out_release;

out_no_map:
	ret = -ENOMEM;
	if (!silent)
		printk("MINIX-fs: can't allocate map\n");
	goto out_release;

out_illegal_sb:
	if (!silent)
		printk("MINIX-fs: bad superblock\n");
	goto out_release;

out_no_fs:
	if (!silent)
		printk("VFS: Can't find a Minix filesystem V1 | V2 | V3 "
		       "on device %s.\n", s->s_id);
out_release:
	brelse(bh);
	goto out;

out_bad_hblock:
	printk("MINIX-fs: blocksize too small for device\n");
	goto out;

out_bad_sb:
	printk("MINIX-fs: unable to read superblock\n");
out:
	s->s_fs_info = NULL;
	kfree(sbi);
	return ret;
}
Esempio n. 23
0
static int fuse_fill_super(struct super_block *sb, void *data, int silent)
{
	struct fuse_conn *fc;
	struct inode *root;
	struct fuse_mount_data d;
	struct file *file;
	struct dentry *root_dentry;
	struct fuse_req *init_req;
	int err;
	int is_bdev = sb->s_bdev != NULL;

	if (sb->s_flags & MS_MANDLOCK)
		return -EINVAL;

	if (!parse_fuse_opt((char *) data, &d, is_bdev))
		return -EINVAL;

	if (is_bdev) {
#ifdef CONFIG_BLOCK
		if (!sb_set_blocksize(sb, d.blksize))
			return -EINVAL;
#endif
	} else {
		sb->s_blocksize = PAGE_CACHE_SIZE;
		sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	}
	sb->s_magic = FUSE_SUPER_MAGIC;
	sb->s_op = &fuse_super_operations;
	sb->s_maxbytes = MAX_LFS_FILESIZE;
	sb->s_export_op = &fuse_export_operations;

	file = fget(d.fd);
	if (!file)
		return -EINVAL;

	if (file->f_op != &fuse_dev_operations)
		return -EINVAL;

	fc = new_conn(sb);
	if (!fc)
		return -ENOMEM;

	fc->flags = d.flags;
	fc->user_id = d.user_id;
	fc->group_id = d.group_id;
	fc->max_read = max_t(unsigned, 4096, d.max_read);

	/* Used by get_root_inode() */
	sb->s_fs_info = fc;

	err = -ENOMEM;
	root = get_root_inode(sb, d.rootmode);
	if (!root)
		goto err;

	root_dentry = d_alloc_root(root);
	if (!root_dentry) {
		iput(root);
		goto err;
	}

	init_req = fuse_request_alloc();
	if (!init_req)
		goto err_put_root;

	if (is_bdev) {
		fc->destroy_req = fuse_request_alloc();
		if (!fc->destroy_req)
			goto err_free_init_req;
	}

	mutex_lock(&fuse_mutex);
	err = -EINVAL;
	if (file->private_data)
		goto err_unlock;

	err = fuse_ctl_add_conn(fc);
	if (err)
		goto err_unlock;

	list_add_tail(&fc->entry, &fuse_conn_list);
	sb->s_root = root_dentry;
	fc->connected = 1;
	file->private_data = fuse_conn_get(fc);
	mutex_unlock(&fuse_mutex);
	/*
	 * atomic_dec_and_test() in fput() provides the necessary
	 * memory barrier for file->private_data to be visible on all
	 * CPUs after this
	 */
	fput(file);

	fuse_send_init(fc, init_req);

	return 0;

 err_unlock:
	mutex_unlock(&fuse_mutex);
 err_free_init_req:
	fuse_request_free(init_req);
 err_put_root:
	dput(root_dentry);
 err:
	fput(file);
	fuse_conn_put(fc);
	return err;
}
Esempio n. 24
0
/**
 * This is called (by sf_read_super_[24|26] when vfs mounts the fs and
 * wants to read super_block.
 *
 * calls [sf_glob_alloc] to map the folder and allocate global
 * information structure.
 *
 * initializes [sb], initializes root inode and dentry.
 *
 * should respect [flags]
 */
static int sf_read_super_aux(struct super_block *sb, void *data, int flags)
{
    int err;
    struct dentry *droot;
    struct inode *iroot;
    struct sf_inode_info *sf_i;
    struct sf_glob_info *sf_g;
    SHFLFSOBJINFO fsinfo;
    struct vbsf_mount_info_new *info;

    TRACE();
    if (!data)
    {
        LogFunc(("no mount info specified\n"));
        return -EINVAL;
    }

    info = data;

    if (flags & MS_REMOUNT)
    {
        LogFunc(("remounting is not supported\n"));
        return -ENOSYS;
    }

    err = sf_glob_alloc(info, &sf_g);
    if (err)
        goto fail0;

    sf_i = kmalloc(sizeof (*sf_i), GFP_KERNEL);
    if (!sf_i)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for root inode info\n"));
        goto fail1;
    }

    sf_i->handle = SHFL_HANDLE_NIL;
    sf_i->path = kmalloc(sizeof(SHFLSTRING) + 1, GFP_KERNEL);
    if (!sf_i->path)
    {
        err = -ENOMEM;
        LogRelFunc(("could not allocate memory for root inode path\n"));
        goto fail2;
    }

    sf_i->path->u16Length = 1;
    sf_i->path->u16Size = 2;
    sf_i->path->String.utf8[0] = '/';
    sf_i->path->String.utf8[1] = 0;

    err = sf_stat(__func__, sf_g, sf_i->path, &fsinfo, 0);
    if (err)
    {
        LogFunc(("could not stat root of share\n"));
        goto fail3;
    }

    sb->s_magic = 0xface;
    sb->s_blocksize = 1024;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 3)
    /* Required for seek/sendfile.
     *
     * Must by less than or equal to INT64_MAX despite the fact that the
     * declaration of this variable is unsigned long long. See determination
     * of 'loff_t max' in fs/read_write.c / do_sendfile(). I don't know the
     * correct limit but MAX_LFS_FILESIZE (8TB-1 on 32-bit boxes) takes the
     * page cache into account and is the suggested limit. */
# if defined MAX_LFS_FILESIZE
    sb->s_maxbytes = MAX_LFS_FILESIZE;
# else
    sb->s_maxbytes = 0x7fffffffffffffffULL;
# endif
#endif
    sb->s_op = &sf_super_ops;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
    iroot = iget_locked(sb, 0);
#else
    iroot = iget(sb, 0);
#endif
    if (!iroot)
    {
        err = -ENOMEM;  /* XXX */
        LogFunc(("could not get root inode\n"));
        goto fail3;
    }

    if (sf_init_backing_dev(sf_g))
    {
        err = -EINVAL;
        LogFunc(("could not init bdi\n"));
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
        unlock_new_inode(iroot);
#endif
        goto fail4;
    }

    sf_init_inode(sf_g, iroot, &fsinfo);
    SET_INODE_INFO(iroot, sf_i);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 25)
    unlock_new_inode(iroot);
#endif

    droot = d_alloc_root(iroot);
    if (!droot)
    {
        err = -ENOMEM;  /* XXX */
        LogFunc(("d_alloc_root failed\n"));
        goto fail5;
    }

    sb->s_root = droot;
    SET_GLOB_INFO(sb, sf_g);
    return 0;

fail5:
    sf_done_backing_dev(sf_g);

fail4:
    iput(iroot);

fail3:
    kfree(sf_i->path);

fail2:
    kfree(sf_i);

fail1:
    sf_glob_free(sf_g);

fail0:
    return err;
}
Esempio n. 25
0
static int romfs_fill_super(struct super_block *s, void *data, int silent)
{
	struct buffer_head *bh;
	struct romfs_super_block *rsb;
	struct inode *root;
	int sz, ret = -EINVAL;

	/* I would parse the options here, but there are none.. :) */

	sb_set_blocksize(s, ROMBSIZE);
	s->s_maxbytes = 0xFFFFFFFF;

	bh = sb_bread(s, 0);
	if (!bh) {
		/* XXX merge with other printk? */
                printk ("romfs: unable to read superblock\n");
		goto outnobh;
	}

	rsb = (struct romfs_super_block *)bh->b_data;
	sz = be32_to_cpu(rsb->size);
	if (rsb->word0 != ROMSB_WORD0 || rsb->word1 != ROMSB_WORD1
	   || sz < ROMFH_SIZE) {
		if (!silent)
			printk ("VFS: Can't find a romfs filesystem on dev "
				"%s.\n", s->s_id);
		goto out;
	}
	if (romfs_checksum(rsb, min_t(int, sz, 512))) {
		printk ("romfs: bad initial checksum on dev "
			"%s.\n", s->s_id);
		goto out;
	}

	s->s_magic = ROMFS_MAGIC;
	s->s_fs_info = (void *)(long)sz;

	s->s_flags |= MS_RDONLY;

	/* Find the start of the fs */
	sz = (ROMFH_SIZE +
	      strnlen(rsb->name, ROMFS_MAXFN) + 1 + ROMFH_PAD)
	     & ROMFH_MASK;

	s->s_op	= &romfs_ops;
	root = romfs_iget(s, sz);
	if (IS_ERR(root)) {
		ret = PTR_ERR(root);
		goto out;
	}

	ret = -ENOMEM;
	s->s_root = d_alloc_root(root);
	if (!s->s_root)
		goto outiput;

	brelse(bh);
	return 0;

outiput:
	iput(root);
out:
	brelse(bh);
outnobh:
	return ret;
}
Esempio n. 26
0
int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
{
	struct jffs2_sb_info *c;
	struct inode *root_i;
	int ret;
	size_t blocks;

	c = JFFS2_SB_INFO(sb);

#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
	if (c->mtd->type == MTD_NANDFLASH) {
		printk(KERN_ERR "jffs2: Cannot operate on NAND flash unless jffs2 NAND support is compiled in.\n");
		return -EINVAL;
	}
	if (c->mtd->type == MTD_DATAFLASH) {
		printk(KERN_ERR "jffs2: Cannot operate on DataFlash unless jffs2 DataFlash support is compiled in.\n");
		return -EINVAL;
	}
#endif

	c->flash_size = c->mtd->size;
	c->sector_size = c->mtd->erasesize;
	blocks = c->flash_size / c->sector_size;

	/*
	 * Size alignment check
	 */
	if ((c->sector_size * blocks) != c->flash_size) {
		c->flash_size = c->sector_size * blocks;
		printk(KERN_INFO "jffs2: Flash size not aligned to erasesize, reducing to %dKiB\n",
			c->flash_size / 1024);
	}

	if (c->flash_size < 5*c->sector_size) {
		printk(KERN_ERR "jffs2: Too few erase blocks (%d)\n", c->flash_size / c->sector_size);
		return -EINVAL;
	}

	c->cleanmarker_size = sizeof(struct jffs2_unknown_node);

	/* NAND (or other bizarre) flash... do setup accordingly */
	ret = jffs2_flash_setup(c);
	if (ret)
		return ret;

	c->inocache_list = kmalloc(INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *), GFP_KERNEL);
	if (!c->inocache_list) {
		ret = -ENOMEM;
		goto out_wbuf;
	}
	memset(c->inocache_list, 0, INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *));

	if ((ret = jffs2_do_mount_fs(c)))
		goto out_inohash;

	ret = -EINVAL;

	D1(printk(KERN_DEBUG "jffs2_do_fill_super(): Getting root inode\n"));
	root_i = iget(sb, 1);
	if (is_bad_inode(root_i)) {
		D1(printk(KERN_WARNING "get root inode failed\n"));
		goto out_root_i;
	}

	D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n"));
	sb->s_root = d_alloc_root(root_i);
	if (!sb->s_root)
		goto out_root_i;

	sb->s_maxbytes = 0xFFFFFFFF;
	sb->s_blocksize = PAGE_CACHE_SIZE;
	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	sb->s_magic = JFFS2_SUPER_MAGIC;
	if (!(sb->s_flags & MS_RDONLY))
		jffs2_start_garbage_collect_thread(c);
	return 0;

 out_root_i:
	iput(root_i);
	jffs2_free_ino_caches(c);
	jffs2_free_raw_node_refs(c);
	if (jffs2_blocks_use_vmalloc(c))
		vfree(c->blocks);
	else
		kfree(c->blocks);
 out_inohash:
	kfree(c->inocache_list);
 out_wbuf:
	jffs2_flash_cleanup(c);

	return ret;
}
Esempio n. 27
0
static int ext2_fill_super(struct super_block *sb, void *data, int silent)
{
	struct buffer_head * bh;
	struct ext2_sb_info * sbi;
	struct ext2_super_block * es;
	struct inode *root;
	unsigned long block;
	unsigned long sb_block = get_sb_block(&data);
	unsigned long logic_sb_block;
	unsigned long offset = 0;
	unsigned long def_mount_opts;
	long ret = -EINVAL;
	int blocksize = BLOCK_SIZE;
	int db_count;
	int i, j;
	__le32 features;
	int err;

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi)
		return -ENOMEM;

	sbi->s_blockgroup_lock =
		kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
	if (!sbi->s_blockgroup_lock) {
		kfree(sbi);
		return -ENOMEM;
	}
	sb->s_fs_info = sbi;
	sbi->s_sb_block = sb_block;

	spin_lock_init(&sbi->s_lock);

	/*
	 * See what the current blocksize for the device is, and
	 * use that as the blocksize.  Otherwise (or if the blocksize
	 * is smaller than the default) use the default.
	 * This is important for devices that have a hardware
	 * sectorsize that is larger than the default.
	 */
	blocksize = sb_min_blocksize(sb, BLOCK_SIZE);
	if (!blocksize) {
		ext2_msg(sb, KERN_ERR, "error: unable to set blocksize");
		goto failed_sbi;
	}

	/*
	 * If the superblock doesn't start on a hardware sector boundary,
	 * calculate the offset.  
	 */
	if (blocksize != BLOCK_SIZE) {
		logic_sb_block = (sb_block*BLOCK_SIZE) / blocksize;
		offset = (sb_block*BLOCK_SIZE) % blocksize;
	} else {
		logic_sb_block = sb_block;
	}

	if (!(bh = sb_bread(sb, logic_sb_block))) {
		ext2_msg(sb, KERN_ERR, "error: unable to read superblock");
		goto failed_sbi;
	}
	/*
	 * Note: s_es must be initialized as soon as possible because
	 *       some ext2 macro-instructions depend on its value
	 */
	es = (struct ext2_super_block *) (((char *)bh->b_data) + offset);
	sbi->s_es = es;
	sb->s_magic = le16_to_cpu(es->s_magic);

	if (sb->s_magic != EXT2_SUPER_MAGIC)
		goto cantfind_ext2;

	/* Set defaults before we parse the mount options */
	def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
	if (def_mount_opts & EXT2_DEFM_DEBUG)
		set_opt(sbi->s_mount_opt, DEBUG);
	if (def_mount_opts & EXT2_DEFM_BSDGROUPS)
		set_opt(sbi->s_mount_opt, GRPID);
	if (def_mount_opts & EXT2_DEFM_UID16)
		set_opt(sbi->s_mount_opt, NO_UID32);
#ifdef CONFIG_EXT2_FS_XATTR
	if (def_mount_opts & EXT2_DEFM_XATTR_USER)
		set_opt(sbi->s_mount_opt, XATTR_USER);
#endif
#ifdef CONFIG_EXT2_FS_POSIX_ACL
	if (def_mount_opts & EXT2_DEFM_ACL)
		set_opt(sbi->s_mount_opt, POSIX_ACL);
#endif
	
	if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_PANIC)
		set_opt(sbi->s_mount_opt, ERRORS_PANIC);
	else if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_CONTINUE)
		set_opt(sbi->s_mount_opt, ERRORS_CONT);
	else
		set_opt(sbi->s_mount_opt, ERRORS_RO);

	sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
	sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
	
	set_opt(sbi->s_mount_opt, RESERVATION);

	if (!parse_options((char *) data, sb))
		goto failed_mount;

	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
		((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
		 MS_POSIXACL : 0);

	ext2_xip_verify_sb(sb); /* see if bdev supports xip, unset
				    EXT2_MOUNT_XIP if not */

	if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
	    (EXT2_HAS_COMPAT_FEATURE(sb, ~0U) ||
	     EXT2_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
	     EXT2_HAS_INCOMPAT_FEATURE(sb, ~0U)))
		ext2_msg(sb, KERN_WARNING,
			"warning: feature flags set on rev 0 fs, "
			"running e2fsck is recommended");
	/*
	 * Check feature flags regardless of the revision level, since we
	 * previously didn't change the revision level when setting the flags,
	 * so there is a chance incompat flags are set on a rev 0 filesystem.
	 */
	features = EXT2_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP);
	if (features) {
		ext2_msg(sb, KERN_ERR,	"error: couldn't mount because of "
		       "unsupported optional features (%x)",
			le32_to_cpu(features));
		goto failed_mount;
	}
	if (!(sb->s_flags & MS_RDONLY) &&
	    (features = EXT2_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP))){
		ext2_msg(sb, KERN_ERR, "error: couldn't mount RDWR because of "
		       "unsupported optional features (%x)",
		       le32_to_cpu(features));
		goto failed_mount;
	}

	blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);

	if (ext2_use_xip(sb) && blocksize != PAGE_SIZE) {
		if (!silent)
			ext2_msg(sb, KERN_ERR,
				"error: unsupported blocksize for xip");
		goto failed_mount;
	}

	/* If the blocksize doesn't match, re-read the thing.. */
	if (sb->s_blocksize != blocksize) {
		brelse(bh);

		if (!sb_set_blocksize(sb, blocksize)) {
			ext2_msg(sb, KERN_ERR, "error: blocksize is too small");
			goto failed_sbi;
		}

		logic_sb_block = (sb_block*BLOCK_SIZE) / blocksize;
		offset = (sb_block*BLOCK_SIZE) % blocksize;
		bh = sb_bread(sb, logic_sb_block);
		if(!bh) {
			ext2_msg(sb, KERN_ERR, "error: couldn't read"
				"superblock on 2nd try");
			goto failed_sbi;
		}
		es = (struct ext2_super_block *) (((char *)bh->b_data) + offset);
		sbi->s_es = es;
		if (es->s_magic != cpu_to_le16(EXT2_SUPER_MAGIC)) {
			ext2_msg(sb, KERN_ERR, "error: magic mismatch");
			goto failed_mount;
		}
	}

	sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits);

	if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV) {
		sbi->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
		sbi->s_first_ino = EXT2_GOOD_OLD_FIRST_INO;
	} else {
		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
		if ((sbi->s_inode_size < EXT2_GOOD_OLD_INODE_SIZE) ||
		    !is_power_of_2(sbi->s_inode_size) ||
		    (sbi->s_inode_size > blocksize)) {
			ext2_msg(sb, KERN_ERR,
				"error: unsupported inode size: %d",
				sbi->s_inode_size);
			goto failed_mount;
		}
	}

	sbi->s_frag_size = EXT2_MIN_FRAG_SIZE <<
				   le32_to_cpu(es->s_log_frag_size);
	if (sbi->s_frag_size == 0)
		goto cantfind_ext2;
	sbi->s_frags_per_block = sb->s_blocksize / sbi->s_frag_size;

	sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
	sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
	sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);

	if (EXT2_INODE_SIZE(sb) == 0)
		goto cantfind_ext2;
	sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
	if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
		goto cantfind_ext2;
	sbi->s_itb_per_group = sbi->s_inodes_per_group /
					sbi->s_inodes_per_block;
	sbi->s_desc_per_block = sb->s_blocksize /
					sizeof (struct ext2_group_desc);
	sbi->s_sbh = bh;
	sbi->s_mount_state = le16_to_cpu(es->s_state);
	sbi->s_addr_per_block_bits =
		ilog2 (EXT2_ADDR_PER_BLOCK(sb));
	sbi->s_desc_per_block_bits =
		ilog2 (EXT2_DESC_PER_BLOCK(sb));

	if (sb->s_magic != EXT2_SUPER_MAGIC)
		goto cantfind_ext2;

	if (sb->s_blocksize != bh->b_size) {
		if (!silent)
			ext2_msg(sb, KERN_ERR, "error: unsupported blocksize");
		goto failed_mount;
	}

	if (sb->s_blocksize != sbi->s_frag_size) {
		ext2_msg(sb, KERN_ERR,
			"error: fragsize %lu != blocksize %lu"
			"(not supported yet)",
			sbi->s_frag_size, sb->s_blocksize);
		goto failed_mount;
	}

	if (sbi->s_blocks_per_group > sb->s_blocksize * 8) {
		ext2_msg(sb, KERN_ERR,
			"error: #blocks per group too big: %lu",
			sbi->s_blocks_per_group);
		goto failed_mount;
	}
	if (sbi->s_frags_per_group > sb->s_blocksize * 8) {
		ext2_msg(sb, KERN_ERR,
			"error: #fragments per group too big: %lu",
			sbi->s_frags_per_group);
		goto failed_mount;
	}
	if (sbi->s_inodes_per_group > sb->s_blocksize * 8) {
		ext2_msg(sb, KERN_ERR,
			"error: #inodes per group too big: %lu",
			sbi->s_inodes_per_group);
		goto failed_mount;
	}

	if (EXT2_BLOCKS_PER_GROUP(sb) == 0)
		goto cantfind_ext2;
 	sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
 				le32_to_cpu(es->s_first_data_block) - 1)
 					/ EXT2_BLOCKS_PER_GROUP(sb)) + 1;
	db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
		   EXT2_DESC_PER_BLOCK(sb);
	sbi->s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL);
	if (sbi->s_group_desc == NULL) {
		ext2_msg(sb, KERN_ERR, "error: not enough memory");
		goto failed_mount;
	}
	bgl_lock_init(sbi->s_blockgroup_lock);
	sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL);
	if (!sbi->s_debts) {
		ext2_msg(sb, KERN_ERR, "error: not enough memory");
		goto failed_mount_group_desc;
	}
	for (i = 0; i < db_count; i++) {
		block = descriptor_loc(sb, logic_sb_block, i);
		sbi->s_group_desc[i] = sb_bread(sb, block);
		if (!sbi->s_group_desc[i]) {
			for (j = 0; j < i; j++)
				brelse (sbi->s_group_desc[j]);
			ext2_msg(sb, KERN_ERR,
				"error: unable to read group descriptors");
			goto failed_mount_group_desc;
		}
	}
	if (!ext2_check_descriptors (sb)) {
		ext2_msg(sb, KERN_ERR, "group descriptors corrupted");
		goto failed_mount2;
	}
	sbi->s_gdb_count = db_count;
	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
	spin_lock_init(&sbi->s_next_gen_lock);

	/* per fileystem reservation list head & lock */
	spin_lock_init(&sbi->s_rsv_window_lock);
	sbi->s_rsv_window_root = RB_ROOT;
	/*
	 * Add a single, static dummy reservation to the start of the
	 * reservation window list --- it gives us a placeholder for
	 * append-at-start-of-list which makes the allocation logic
	 * _much_ simpler.
	 */
	sbi->s_rsv_window_head.rsv_start = EXT2_RESERVE_WINDOW_NOT_ALLOCATED;
	sbi->s_rsv_window_head.rsv_end = EXT2_RESERVE_WINDOW_NOT_ALLOCATED;
	sbi->s_rsv_window_head.rsv_alloc_hit = 0;
	sbi->s_rsv_window_head.rsv_goal_size = 0;
	ext2_rsv_window_add(sb, &sbi->s_rsv_window_head);

	err = percpu_counter_init(&sbi->s_freeblocks_counter,
				ext2_count_free_blocks(sb));
	if (!err) {
		err = percpu_counter_init(&sbi->s_freeinodes_counter,
				ext2_count_free_inodes(sb));
	}
	if (!err) {
		err = percpu_counter_init(&sbi->s_dirs_counter,
				ext2_count_dirs(sb));
	}
	if (err) {
		ext2_msg(sb, KERN_ERR, "error: insufficient memory");
		goto failed_mount3;
	}
	/*
	 * set up enough so that it can read an inode
	 */
	sb->s_op = &ext2_sops;
	sb->s_export_op = &ext2_export_ops;
	sb->s_xattr = ext2_xattr_handlers;
	root = ext2_iget(sb, EXT2_ROOT_INO);
	if (IS_ERR(root)) {
		ret = PTR_ERR(root);
		goto failed_mount3;
	}
	if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
		iput(root);
		ext2_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
		goto failed_mount3;
	}

	sb->s_root = d_alloc_root(root);
	if (!sb->s_root) {
		iput(root);
		ext2_msg(sb, KERN_ERR, "error: get root inode failed");
		ret = -ENOMEM;
		goto failed_mount3;
	}
	if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
		ext2_msg(sb, KERN_WARNING,
			"warning: mounting ext3 filesystem as ext2");
	if (ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY))
		sb->s_flags |= MS_RDONLY;
	ext2_write_super(sb);
	return 0;

cantfind_ext2:
	if (!silent)
		ext2_msg(sb, KERN_ERR,
			"error: can't find an ext2 filesystem on dev %s.",
			sb->s_id);
	goto failed_mount;
failed_mount3:
	percpu_counter_destroy(&sbi->s_freeblocks_counter);
	percpu_counter_destroy(&sbi->s_freeinodes_counter);
	percpu_counter_destroy(&sbi->s_dirs_counter);
failed_mount2:
	for (i = 0; i < db_count; i++)
		brelse(sbi->s_group_desc[i]);
failed_mount_group_desc:
	kfree(sbi->s_group_desc);
	kfree(sbi->s_debts);
failed_mount:
	brelse(bh);
failed_sbi:
	sb->s_fs_info = NULL;
	kfree(sbi->s_blockgroup_lock);
	kfree(sbi);
	return ret;
}
/* Called by the VFS at mount time to initialize the whole file system.  */
static int jffs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct inode *root_inode;
	struct jffs_control *c;

	sb->s_flags |= MS_NODIRATIME;

	D1(printk(KERN_NOTICE "JFFS: Trying to mount device %s.\n",
		  sb->s_id));

	if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) {
		printk(KERN_WARNING "JFFS: Trying to mount a "
		       "non-mtd device.\n");
		return -EINVAL;
	}

	sb->s_blocksize = PAGE_CACHE_SIZE;
	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	sb->s_fs_info = (void *) 0;
	sb->s_maxbytes = 0xFFFFFFFF;

	/* Build the file system.  */
	if (jffs_build_fs(sb) < 0) {
		goto jffs_sb_err1;
	}

	/*
	 * set up enough so that we can read an inode
	 */
	sb->s_magic = JFFS_MAGIC_SB_BITMASK;
	sb->s_op = &jffs_ops;

	root_inode = iget(sb, JFFS_MIN_INO);
	if (!root_inode)
	        goto jffs_sb_err2;

	/* Get the root directory of this file system.  */
	if (!(sb->s_root = d_alloc_root(root_inode))) {
		goto jffs_sb_err3;
	}

	c = (struct jffs_control *) sb->s_fs_info;

#ifdef CONFIG_JFFS_PROC_FS
	/* Set up the jffs proc file system.  */
	if (jffs_register_jffs_proc_dir(MINOR(sb->s_dev), c) < 0) {
		printk(KERN_WARNING "JFFS: Failed to initialize the JFFS "
			"proc file system for device %s.\n",
			sb->s_id);
	}
#endif

	/* Set the Garbage Collection thresholds */

	/* GC if free space goes below 5% of the total size */
	c->gc_minfree_threshold = c->fmc->flash_size / 20;

	if (c->gc_minfree_threshold < c->fmc->sector_size)
		c->gc_minfree_threshold = c->fmc->sector_size;

	/* GC if dirty space exceeds 33% of the total size. */
	c->gc_maxdirty_threshold = c->fmc->flash_size / 3;

	if (c->gc_maxdirty_threshold < c->fmc->sector_size)
		c->gc_maxdirty_threshold = c->fmc->sector_size;


	c->thread_pid = kernel_thread (jffs_garbage_collect_thread, 
				        (void *) c, 
				        CLONE_KERNEL);
	D1(printk(KERN_NOTICE "JFFS: GC thread pid=%d.\n", (int) c->thread_pid));

	D1(printk(KERN_NOTICE "JFFS: Successfully mounted device %s.\n",
	       sb->s_id));
	return 0;

jffs_sb_err3:
	iput(root_inode);
jffs_sb_err2:
	jffs_cleanup_control((struct jffs_control *)sb->s_fs_info);
jffs_sb_err1:
	printk(KERN_WARNING "JFFS: Failed to mount device %s.\n",
	       sb->s_id);
	return -EINVAL;
}
Esempio n. 29
0
static int ufs_fill_super(struct super_block *sb, void *data, int silent)
{
    struct ufs_sb_info * sbi;
    struct ufs_sb_private_info * uspi;
    struct ufs_super_block_first * usb1;
    struct ufs_super_block_second * usb2;
    struct ufs_super_block_third * usb3;
    struct ufs_buffer_head * ubh;
    struct inode *inode;
    unsigned block_size, super_block_size;
    unsigned flags;
    unsigned super_block_offset;

    uspi = NULL;
    ubh = NULL;
    flags = 0;

    UFSD("ENTER\n");

    sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
    if (!sbi)
        goto failed_nomem;
    sb->s_fs_info = sbi;

    UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));

#ifndef CONFIG_UFS_FS_WRITE
    if (!(sb->s_flags & MS_RDONLY)) {
        printk("ufs was compiled with read-only support, "
               "can't be mounted as read-write\n");
        goto failed;
    }
#endif
    /*
     * Set default mount options
     * Parse mount options
     */
    sbi->s_mount_opt = 0;
    ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
    if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
        printk("wrong mount options\n");
        goto failed;
    }
    if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
        if (!silent)
            printk("You didn't specify the type of your ufs filesystem\n\n"
                   "mount -t ufs -o ufstype="
                   "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
                   ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
                   "default is ufstype=old\n");
        ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
    }

    sbi->s_uspi = uspi =
                      kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
    if (!uspi)
        goto failed;
    uspi->s_dirblksize = UFS_SECTOR_SIZE;
    super_block_offset=UFS_SBLOCK;

    /* Keep 2Gig file limit. Some UFS variants need to override
       this but as I don't know which I'll let those in the know loosen
       the rules */
    switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
    case UFS_MOUNT_UFSTYPE_44BSD:
        UFSD("ufstype=44bsd\n");
        uspi->s_fsize = block_size = 512;
        uspi->s_fmask = ~(512 - 1);
        uspi->s_fshift = 9;
        uspi->s_sbsize = super_block_size = 1536;
        uspi->s_sbbase = 0;
        flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
        break;
    case UFS_MOUNT_UFSTYPE_UFS2:
        UFSD("ufstype=ufs2\n");
        super_block_offset=SBLOCK_UFS2;
        uspi->s_fsize = block_size = 512;
        uspi->s_fmask = ~(512 - 1);
        uspi->s_fshift = 9;
        uspi->s_sbsize = super_block_size = 1536;
        uspi->s_sbbase =  0;
        flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
        break;

    case UFS_MOUNT_UFSTYPE_SUN:
        UFSD("ufstype=sun\n");
        uspi->s_fsize = block_size = 1024;
        uspi->s_fmask = ~(1024 - 1);
        uspi->s_fshift = 10;
        uspi->s_sbsize = super_block_size = 2048;
        uspi->s_sbbase = 0;
        uspi->s_maxsymlinklen = 56;
        flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
        break;

    case UFS_MOUNT_UFSTYPE_SUNx86:
        UFSD("ufstype=sunx86\n");
        uspi->s_fsize = block_size = 1024;
        uspi->s_fmask = ~(1024 - 1);
        uspi->s_fshift = 10;
        uspi->s_sbsize = super_block_size = 2048;
        uspi->s_sbbase = 0;
        uspi->s_maxsymlinklen = 56;
        flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
        break;

    case UFS_MOUNT_UFSTYPE_OLD:
        UFSD("ufstype=old\n");
        uspi->s_fsize = block_size = 1024;
        uspi->s_fmask = ~(1024 - 1);
        uspi->s_fshift = 10;
        uspi->s_sbsize = super_block_size = 2048;
        uspi->s_sbbase = 0;
        flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
        if (!(sb->s_flags & MS_RDONLY)) {
            if (!silent)
                printk(KERN_INFO "ufstype=old is supported read-only\n");
            sb->s_flags |= MS_RDONLY;
        }
        break;

    case UFS_MOUNT_UFSTYPE_NEXTSTEP:
        /*TODO: check may be we need set special dir block size?*/
        UFSD("ufstype=nextstep\n");
        uspi->s_fsize = block_size = 1024;
        uspi->s_fmask = ~(1024 - 1);
        uspi->s_fshift = 10;
        uspi->s_sbsize = super_block_size = 2048;
        uspi->s_sbbase = 0;
        flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
        if (!(sb->s_flags & MS_RDONLY)) {
            if (!silent)
                printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
            sb->s_flags |= MS_RDONLY;
        }
        break;

    case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
        /*TODO: check may be we need set special dir block size?*/
        UFSD("ufstype=nextstep-cd\n");
        uspi->s_fsize = block_size = 2048;
        uspi->s_fmask = ~(2048 - 1);
        uspi->s_fshift = 11;
        uspi->s_sbsize = super_block_size = 2048;
        uspi->s_sbbase = 0;
        flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
        if (!(sb->s_flags & MS_RDONLY)) {
            if (!silent)
                printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
            sb->s_flags |= MS_RDONLY;
        }
        break;

    case UFS_MOUNT_UFSTYPE_OPENSTEP:
        UFSD("ufstype=openstep\n");
        uspi->s_fsize = block_size = 1024;
        uspi->s_fmask = ~(1024 - 1);
        uspi->s_fshift = 10;
        uspi->s_sbsize = super_block_size = 2048;
        uspi->s_sbbase = 0;
        uspi->s_dirblksize = 1024;
        flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
        if (!(sb->s_flags & MS_RDONLY)) {
            if (!silent)
                printk(KERN_INFO "ufstype=openstep is supported read-only\n");
            sb->s_flags |= MS_RDONLY;
        }
        break;

    case UFS_MOUNT_UFSTYPE_HP:
        UFSD("ufstype=hp\n");
        uspi->s_fsize = block_size = 1024;
        uspi->s_fmask = ~(1024 - 1);
        uspi->s_fshift = 10;
        uspi->s_sbsize = super_block_size = 2048;
        uspi->s_sbbase = 0;
        flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
        if (!(sb->s_flags & MS_RDONLY)) {
            if (!silent)
                printk(KERN_INFO "ufstype=hp is supported read-only\n");
            sb->s_flags |= MS_RDONLY;
        }
        break;
    default:
        if (!silent)
            printk("unknown ufstype\n");
        goto failed;
    }

again:
    if (!sb_set_blocksize(sb, block_size)) {
        printk(KERN_ERR "UFS: failed to set blocksize\n");
        goto failed;
    }

    /*
     * read ufs super block from device
     */

    ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);

    if (!ubh)
        goto failed;


    usb1 = ubh_get_usb_first(uspi);
    usb2 = ubh_get_usb_second(uspi);
    usb3 = ubh_get_usb_third(uspi);

    /*
     * Check ufs magic number
     */
    sbi->s_bytesex = BYTESEX_LE;
    switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
    case UFS_MAGIC:
    case UFS2_MAGIC:
    case UFS_MAGIC_LFN:
    case UFS_MAGIC_FEA:
    case UFS_MAGIC_4GB:
        goto magic_found;
    }
    sbi->s_bytesex = BYTESEX_BE;
    switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
    case UFS_MAGIC:
    case UFS2_MAGIC:
    case UFS_MAGIC_LFN:
    case UFS_MAGIC_FEA:
    case UFS_MAGIC_4GB:
        goto magic_found;
    }

    if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP)
            || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD)
            || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP))
            && uspi->s_sbbase < 256) {
        ubh_brelse_uspi(uspi);
        ubh = NULL;
        uspi->s_sbbase += 8;
        goto again;
    }
    if (!silent)
        printk("ufs_read_super: bad magic number\n");
    goto failed;

magic_found:
    /*
     * Check block and fragment sizes
     */
    uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
    uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
    uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
    uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
    uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);

    if (uspi->s_fsize & (uspi->s_fsize - 1)) {
        printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
               uspi->s_fsize);
        goto failed;
    }
    if (uspi->s_fsize < 512) {
        printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
               uspi->s_fsize);
        goto failed;
    }
    if (uspi->s_fsize > 4096) {
        printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
               uspi->s_fsize);
        goto failed;
    }
    if (uspi->s_bsize & (uspi->s_bsize - 1)) {
        printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
               uspi->s_bsize);
        goto failed;
    }
    if (uspi->s_bsize < 4096) {
        printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
               uspi->s_bsize);
        goto failed;
    }
    if (uspi->s_bsize / uspi->s_fsize > 8) {
        printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
               uspi->s_bsize / uspi->s_fsize);
        goto failed;
    }
    if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
        ubh_brelse_uspi(uspi);
        ubh = NULL;
        block_size = uspi->s_fsize;
        super_block_size = uspi->s_sbsize;
        UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
        goto again;
    }


    ufs_print_super_stuff(sb, usb1, usb2, usb3);

    /*
     * Check, if file system was correctly unmounted.
     * If not, make it read only.
     */
    if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
            ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
            (((flags & UFS_ST_MASK) == UFS_ST_SUN ||
              (flags & UFS_ST_MASK) == UFS_ST_SUNx86) &&
             (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
        switch(usb1->fs_clean) {
        case UFS_FSCLEAN:
            UFSD("fs is clean\n");
            break;
        case UFS_FSSTABLE:
            UFSD("fs is stable\n");
            break;
        case UFS_FSOSF1:
            UFSD("fs is DEC OSF/1\n");
            break;
        case UFS_FSACTIVE:
            printk("ufs_read_super: fs is active\n");
            sb->s_flags |= MS_RDONLY;
            break;
        case UFS_FSBAD:
            printk("ufs_read_super: fs is bad\n");
            sb->s_flags |= MS_RDONLY;
            break;
        default:
            printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
            sb->s_flags |= MS_RDONLY;
            break;
        }
    } else {
        printk("ufs_read_super: fs needs fsck\n");
        sb->s_flags |= MS_RDONLY;
    }

    /*
     * Read ufs_super_block into internal data structures
     */
    sb->s_op = &ufs_super_ops;
    sb->dq_op = NULL; /***/
    sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);

    uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
    uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
    uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
    uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
    uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
    uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);

    if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
        uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
        uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
    } else {
        uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
        uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
    }

    uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
    /* s_bsize already set */
    /* s_fsize already set */
    uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
    uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
    uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
    uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
    uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
    uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
    UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
         uspi->s_fshift);
    uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
    uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
    /* s_sbsize already set */
    uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
    uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
    uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
    uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
    uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
    uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
    uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
    uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);

    if (uspi->fs_magic == UFS2_MAGIC)
        uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
    else
        uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);

    uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
    uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
    uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
    uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
    uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
    uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
    uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
    uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
    uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
    uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
    uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
    uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
    uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
    uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
    uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);

    /*
     * Compute another frequently used values
     */
    uspi->s_fpbmask = uspi->s_fpb - 1;
    if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
        uspi->s_apbshift = uspi->s_bshift - 3;
    else
        uspi->s_apbshift = uspi->s_bshift - 2;

    uspi->s_2apbshift = uspi->s_apbshift * 2;
    uspi->s_3apbshift = uspi->s_apbshift * 3;
    uspi->s_apb = 1 << uspi->s_apbshift;
    uspi->s_2apb = 1 << uspi->s_2apbshift;
    uspi->s_3apb = 1 << uspi->s_3apbshift;
    uspi->s_apbmask = uspi->s_apb - 1;
    uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
    uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
    uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
    uspi->s_bpf = uspi->s_fsize << 3;
    uspi->s_bpfshift = uspi->s_fshift + 3;
    uspi->s_bpfmask = uspi->s_bpf - 1;
    if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
            UFS_MOUNT_UFSTYPE_44BSD)
        uspi->s_maxsymlinklen =
            fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);

    sbi->s_flags = flags;

    inode = iget(sb, UFS_ROOTINO);
    if (!inode || is_bad_inode(inode))
        goto failed;
    sb->s_root = d_alloc_root(inode);
    if (!sb->s_root)
        goto dalloc_failed;

    ufs_setup_cstotal(sb);
    /*
     * Read cylinder group structures
     */
    if (!(sb->s_flags & MS_RDONLY))
        if (!ufs_read_cylinder_structures(sb))
            goto failed;

    UFSD("EXIT\n");
    return 0;

dalloc_failed:
    iput(inode);
failed:
    if (ubh)
        ubh_brelse_uspi (uspi);
    kfree (uspi);
    kfree(sbi);
    sb->s_fs_info = NULL;
    UFSD("EXIT (FAILED)\n");
    return -EINVAL;

failed_nomem:
    UFSD("EXIT (NOMEM)\n");
    return -ENOMEM;
}
Esempio n. 30
0
static int
cifs_read_super(struct super_block *sb)
{
	struct inode *inode;
	struct cifs_sb_info *cifs_sb;
	int rc = 0;

	cifs_sb = CIFS_SB(sb);

	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
		sb->s_flags |= MS_POSIXACL;

	if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
		sb->s_maxbytes = MAX_LFS_FILESIZE;
	else
		sb->s_maxbytes = MAX_NON_LFS;

	/* BB FIXME fix time_gran to be larger for LANMAN sessions */
	sb->s_time_gran = 100;

	sb->s_magic = CIFS_MAGIC_NUMBER;
	sb->s_op = &cifs_super_ops;
	sb->s_bdi = &cifs_sb->bdi;
	sb->s_blocksize = CIFS_MAX_MSGSIZE;
	sb->s_blocksize_bits = 14;	/* default 2**14 = CIFS_MAX_MSGSIZE */
	inode = cifs_root_iget(sb);

	if (IS_ERR(inode)) {
		rc = PTR_ERR(inode);
		inode = NULL;
		goto out_no_root;
	}

	sb->s_root = d_alloc_root(inode);

	if (!sb->s_root) {
		rc = -ENOMEM;
		goto out_no_root;
	}

	/* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
	if (cifs_sb_master_tcon(cifs_sb)->nocase)
		sb->s_d_op = &cifs_ci_dentry_ops;
	else
		sb->s_d_op = &cifs_dentry_ops;

#ifdef CIFS_NFSD_EXPORT
	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
		cFYI(1, "export ops supported");
		sb->s_export_op = &cifs_export_ops;
	}
#endif /* CIFS_NFSD_EXPORT */

	return 0;

out_no_root:
	cERROR(1, "cifs_read_super: get root inode failed");
	if (inode)
		iput(inode);

	return rc;
}