Example #1
0
void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
			  int create_ino)
{
	struct super_block *sb;
	struct ocfs2_super *osb;
	int use_plocks = 1;

	sb = inode->i_sb;
	osb = OCFS2_SB(sb);

	if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
	    ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
		use_plocks = 0;

	/*
	 * These have all been checked by ocfs2_read_inode_block() or set
	 * by ocfs2_mknod_locked(), so a failure is a code bug.
	 */
	BUG_ON(!OCFS2_IS_VALID_DINODE(fe));  /* This means that read_inode
						cannot create a superblock
						inode today.  change if
						that is needed. */
	BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
	BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);


	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);

	inode->i_version = 1;
	inode->i_generation = le32_to_cpu(fe->i_generation);
	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
	inode->i_mode = le16_to_cpu(fe->i_mode);
	inode->i_uid = le32_to_cpu(fe->i_uid);
	inode->i_gid = le32_to_cpu(fe->i_gid);

	/* Fast symlinks will have i_size but no allocated clusters. */
	if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
		inode->i_blocks = 0;
	else
		inode->i_blocks = ocfs2_inode_sector_count(inode);
	inode->i_mapping->a_ops = &ocfs2_aops;
	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);

	if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
		mlog(ML_ERROR,
		     "ip_blkno %llu != i_blkno %llu!\n",
		     (unsigned long long)OCFS2_I(inode)->ip_blkno,
		     (unsigned long long)le64_to_cpu(fe->i_blkno));

	set_nlink(inode, ocfs2_read_links_count(fe));

	trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
				   le32_to_cpu(fe->i_flags));
	if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
		inode->i_flags |= S_NOQUOTA;
	}
  
	if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
	} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
	} else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
		inode->i_flags |= S_NOQUOTA;
	} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
		/* we can't actually hit this as read_inode can't
		 * handle superblocks today ;-) */
		BUG();
	}

	switch (inode->i_mode & S_IFMT) {
	    case S_IFREG:
		    if (use_plocks)
			    inode->i_fop = &ocfs2_fops;
		    else
			    inode->i_fop = &ocfs2_fops_no_plocks;
		    inode->i_op = &ocfs2_file_iops;
		    i_size_write(inode, le64_to_cpu(fe->i_size));
		    break;
	    case S_IFDIR:
		    inode->i_op = &ocfs2_dir_iops;
		    if (use_plocks)
			    inode->i_fop = &ocfs2_dops;
		    else
			    inode->i_fop = &ocfs2_dops_no_plocks;
		    i_size_write(inode, le64_to_cpu(fe->i_size));
		    OCFS2_I(inode)->ip_dir_lock_gen = 1;
		    break;
	    case S_IFLNK:
		    if (ocfs2_inode_is_fast_symlink(inode))
			inode->i_op = &ocfs2_fast_symlink_inode_operations;
		    else
			inode->i_op = &ocfs2_symlink_inode_operations;
		    i_size_write(inode, le64_to_cpu(fe->i_size));
		    break;
	    default:
		    inode->i_op = &ocfs2_special_file_iops;
		    init_special_inode(inode, inode->i_mode,
				       inode->i_rdev);
		    break;
	}

	if (create_ino) {
		inode->i_ino = ino_from_blkno(inode->i_sb,
			       le64_to_cpu(fe->i_blkno));

		/*
		 * If we ever want to create system files from kernel,
		 * the generation argument to
		 * ocfs2_inode_lock_res_init() will have to change.
		 */
		BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);

		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
					  OCFS2_LOCK_TYPE_META, 0, inode);

		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
					  OCFS2_LOCK_TYPE_OPEN, 0, inode);
	}

	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
				  OCFS2_LOCK_TYPE_RW, inode->i_generation,
				  inode);

	ocfs2_set_inode_flags(inode);

	OCFS2_I(inode)->ip_last_used_slot = 0;
	OCFS2_I(inode)->ip_last_used_group = 0;

	if (S_ISDIR(inode->i_mode))
		ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
				    OCFS2_RESV_FLAG_DIR);
}
Example #2
0
static int ocfs2_read_locked_inode(struct inode *inode,
				   struct ocfs2_find_inode_args *args)
{
	struct super_block *sb;
	struct ocfs2_super *osb;
	struct ocfs2_dinode *fe;
	struct buffer_head *bh = NULL;
	int status, can_lock;
	u32 generation = 0;

	status = -EINVAL;
	if (inode == NULL || inode->i_sb == NULL) {
		mlog(ML_ERROR, "bad inode\n");
		return status;
	}
	sb = inode->i_sb;
	osb = OCFS2_SB(sb);

	if (!args) {
		mlog(ML_ERROR, "bad inode args\n");
		make_bad_inode(inode);
		return status;
	}

	/*
	 * To improve performance of cold-cache inode stats, we take
	 * the cluster lock here if possible.
	 *
	 * Generally, OCFS2 never trusts the contents of an inode
	 * unless it's holding a cluster lock, so taking it here isn't
	 * a correctness issue as much as it is a performance
	 * improvement.
	 *
	 * There are three times when taking the lock is not a good idea:
	 *
	 * 1) During startup, before we have initialized the DLM.
	 *
	 * 2) If we are reading certain system files which never get
	 *    cluster locks (local alloc, truncate log).
	 *
	 * 3) If the process doing the iget() is responsible for
	 *    orphan dir recovery. We're holding the orphan dir lock and
	 *    can get into a deadlock with another process on another
	 *    node in ->delete_inode().
	 *
	 * #1 and #2 can be simply solved by never taking the lock
	 * here for system files (which are the only type we read
	 * during mount). It's a heavier approach, but our main
	 * concern is user-accessible files anyway.
	 *
	 * #3 works itself out because we'll eventually take the
	 * cluster lock before trusting anything anyway.
	 */
	can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
		&& !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
		&& !ocfs2_mount_local(osb);

	trace_ocfs2_read_locked_inode(
		(unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);

	/*
	 * To maintain backwards compatibility with older versions of
	 * ocfs2-tools, we still store the generation value for system
	 * files. The only ones that actually matter to userspace are
	 * the journals, but it's easier and inexpensive to just flag
	 * all system files similarly.
	 */
	if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
		generation = osb->fs_generation;

	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
				  OCFS2_LOCK_TYPE_META,
				  generation, inode);

	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
				  OCFS2_LOCK_TYPE_OPEN,
				  0, inode);

	if (can_lock) {
		status = ocfs2_open_lock(inode);
		if (status) {
			make_bad_inode(inode);
			mlog_errno(status);
			return status;
		}
		status = ocfs2_inode_lock(inode, NULL, 0);
		if (status) {
			make_bad_inode(inode);
			mlog_errno(status);
			return status;
		}
	}

	if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
		status = ocfs2_try_open_lock(inode, 0);
		if (status) {
			make_bad_inode(inode);
			return status;
		}
	}

	if (can_lock) {
		status = ocfs2_read_inode_block_full(inode, &bh,
						     OCFS2_BH_IGNORE_CACHE);
	} else {
		status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
		/*
		 * If buffer is in jbd, then its checksum may not have been
		 * computed as yet.
		 */
		if (!status && !buffer_jbd(bh))
			status = ocfs2_validate_inode_block(osb->sb, bh);
	}
	if (status < 0) {
		mlog_errno(status);
		goto bail;
	}

	status = -EINVAL;
	fe = (struct ocfs2_dinode *) bh->b_data;

	/*
	 * This is a code bug. Right now the caller needs to
	 * understand whether it is asking for a system file inode or
	 * not so the proper lock names can be built.
	 */
	mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
			!!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
			"Inode %llu: system file state is ambigous\n",
			(unsigned long long)args->fi_blkno);

	if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
	    S_ISBLK(le16_to_cpu(fe->i_mode)))
		inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));

	ocfs2_populate_inode(inode, fe, 0);

	BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));

	status = 0;

bail:
	if (can_lock)
		ocfs2_inode_unlock(inode, 0);

	if (status < 0)
		make_bad_inode(inode);

	if (args && bh)
		brelse(bh);

	return status;
}
Example #3
0
int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
		     	 int create_ino)
{
	struct super_block *sb;
	struct ocfs2_super *osb;
	int status = -EINVAL;

	mlog_entry("(0x%p, size:%llu)\n", inode,
		   (unsigned long long)le64_to_cpu(fe->i_size));

	sb = inode->i_sb;
	osb = OCFS2_SB(sb);

	/* this means that read_inode cannot create a superblock inode
	 * today.  change if needed. */
	if (!OCFS2_IS_VALID_DINODE(fe) ||
	    !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
		mlog(0, "Invalid dinode: i_ino=%lu, i_blkno=%llu, "
		     "signature = %.*s, flags = 0x%x\n",
		     inode->i_ino,
		     (unsigned long long)le64_to_cpu(fe->i_blkno), 7,
		     fe->i_signature, le32_to_cpu(fe->i_flags));
		goto bail;
	}

	if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
		mlog(ML_ERROR, "file entry generation does not match "
		     "superblock! osb->fs_generation=%x, "
		     "fe->i_fs_generation=%x\n",
		     osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
		goto bail;
	}

	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);

	inode->i_version = 1;
	inode->i_generation = le32_to_cpu(fe->i_generation);
	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
	inode->i_mode = le16_to_cpu(fe->i_mode);
	inode->i_uid = le32_to_cpu(fe->i_uid);
	inode->i_gid = le32_to_cpu(fe->i_gid);

	/* Fast symlinks will have i_size but no allocated clusters. */
	if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
		inode->i_blocks = 0;
	else
		inode->i_blocks = ocfs2_inode_sector_count(inode);
	inode->i_mapping->a_ops = &ocfs2_aops;
	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);

	if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
		mlog(ML_ERROR,
		     "ip_blkno %llu != i_blkno %llu!\n",
		     (unsigned long long)OCFS2_I(inode)->ip_blkno,
		     (unsigned long long)le64_to_cpu(fe->i_blkno));

	inode->i_nlink = le16_to_cpu(fe->i_links_count);

	if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;

	if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
		mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
	} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
	} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
		mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
		/* we can't actually hit this as read_inode can't
		 * handle superblocks today ;-) */
		BUG();
	}

	switch (inode->i_mode & S_IFMT) {
	    case S_IFREG:
		    inode->i_fop = &ocfs2_fops;
		    inode->i_op = &ocfs2_file_iops;
		    i_size_write(inode, le64_to_cpu(fe->i_size));
		    break;
	    case S_IFDIR:
		    inode->i_op = &ocfs2_dir_iops;
		    inode->i_fop = &ocfs2_dops;
		    i_size_write(inode, le64_to_cpu(fe->i_size));
		    break;
	    case S_IFLNK:
		    if (ocfs2_inode_is_fast_symlink(inode))
			inode->i_op = &ocfs2_fast_symlink_inode_operations;
		    else
			inode->i_op = &ocfs2_symlink_inode_operations;
		    i_size_write(inode, le64_to_cpu(fe->i_size));
		    break;
	    default:
		    inode->i_op = &ocfs2_special_file_iops;
		    init_special_inode(inode, inode->i_mode,
				       inode->i_rdev);
		    break;
	}

	if (create_ino) {
		inode->i_ino = ino_from_blkno(inode->i_sb,
			       le64_to_cpu(fe->i_blkno));

		/*
		 * If we ever want to create system files from kernel,
		 * the generation argument to
		 * ocfs2_inode_lock_res_init() will have to change.
		 */
		BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);

		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
					  OCFS2_LOCK_TYPE_META, 0, inode);

		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
					  OCFS2_LOCK_TYPE_OPEN, 0, inode);
	}

	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
				  OCFS2_LOCK_TYPE_RW, inode->i_generation,
				  inode);

	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
				  OCFS2_LOCK_TYPE_DATA, inode->i_generation,
				  inode);

	ocfs2_set_inode_flags(inode);

	status = 0;
bail:
	mlog_exit(status);
	return status;
}