示例#1
0
/**
 * nilfs_bmap_propagate - propagate dirty state
 * @bmap: bmap
 * @bh: buffer head
 *
 * Description: nilfs_bmap_propagate() marks the buffers that directly or
 * indirectly refer to the block specified by @bh dirty.
 *
 * Return Value: On success, 0 is returned. On error, one of the following
 * negative error codes is returned.
 *
 * %-EIO - I/O error.
 *
 * %-ENOMEM - Insufficient amount of memory available.
 */
int nilfs_bmap_propagate(struct nilfs_bmap *bmap, struct buffer_head *bh)
{
	int ret;

	down_write(&bmap->b_sem);
	ret = bmap->b_ops->bop_propagate(bmap, bh);
	up_write(&bmap->b_sem);

	return nilfs_bmap_convert_error(bmap, __func__, ret);
}
示例#2
0
/**
 * nilfs_bmap_truncate - truncate a bmap to a specified key
 * @bmap: bmap
 * @key: key
 *
 * Description: nilfs_bmap_truncate() removes key-record pairs whose keys are
 * greater than or equal to @key from @bmap.
 *
 * Return Value: On success, 0 is returned. On error, one of the following
 * negative error codes is returned.
 *
 * %-EIO - I/O error.
 *
 * %-ENOMEM - Insufficient amount of memory available.
 */
int nilfs_bmap_truncate(struct nilfs_bmap *bmap, __u64 key)
{
	int ret;

	down_write(&bmap->b_sem);
	ret = nilfs_bmap_do_truncate(bmap, key);
	up_write(&bmap->b_sem);

	return nilfs_bmap_convert_error(bmap, __func__, ret);
}
示例#3
0
/**
 * nilfs_bmap_insert - insert a new key-record pair into a bmap
 * @bmap: bmap
 * @key: key
 * @rec: record
 *
 * Description: nilfs_bmap_insert() inserts the new key-record pair specified
 * by @key and @rec into @bmap.
 *
 * Return Value: On success, 0 is returned. On error, one of the following
 * negative error codes is returned.
 *
 * %-EIO - I/O error.
 *
 * %-ENOMEM - Insufficient amount of memory available.
 *
 * %-EEXIST - A record associated with @key already exist.
 */
int nilfs_bmap_insert(struct nilfs_bmap *bmap, __u64 key, unsigned long rec)
{
	int ret;

	down_write(&bmap->b_sem);
	ret = nilfs_bmap_do_insert(bmap, key, rec);
	up_write(&bmap->b_sem);

	return nilfs_bmap_convert_error(bmap, __func__, ret);
}
示例#4
0
/**
 * nilfs_bmap_delete - delete a key-record pair from a bmap
 * @bmap: bmap
 * @key: key
 *
 * Description: nilfs_bmap_delete() deletes the key-record pair specified by
 * @key from @bmap.
 *
 * Return Value: On success, 0 is returned. On error, one of the following
 * negative error codes is returned.
 *
 * %-EIO - I/O error.
 *
 * %-ENOMEM - Insufficient amount of memory available.
 *
 * %-ENOENT - A record associated with @key does not exist.
 */
int nilfs_bmap_delete(struct nilfs_bmap *bmap, unsigned long key)
{
	int ret;

	down_write(&bmap->b_sem);
	ret = nilfs_bmap_do_delete(bmap, key);
	up_write(&bmap->b_sem);

	return nilfs_bmap_convert_error(bmap, __func__, ret);
}
示例#5
0
int nilfs_bmap_lookup_contig(struct nilfs_bmap *bmap, __u64 key, __u64 *ptrp,
			     unsigned maxblocks)
{
	int ret;

	down_read(&bmap->b_sem);
	ret = bmap->b_ops->bop_lookup_contig(bmap, key, ptrp, maxblocks);
	up_read(&bmap->b_sem);

	return nilfs_bmap_convert_error(bmap, __func__, ret);
}
示例#6
0
int nilfs_bmap_last_key(struct nilfs_bmap *bmap, __u64 *keyp)
{
	int ret;

	down_read(&bmap->b_sem);
	ret = bmap->b_ops->bop_last_key(bmap, keyp);
	up_read(&bmap->b_sem);

	if (ret < 0)
		ret = nilfs_bmap_convert_error(bmap, __func__, ret);
	return ret;
}
示例#7
0
/**
 * nilfs_bmap_mark - mark block dirty
 * @bmap: bmap
 * @key: key
 * @level: level
 *
 * Description: nilfs_bmap_mark() marks the block specified by @key and @level
 * as dirty.
 *
 * Return Value: On success, 0 is returned. On error, one of the following
 * negative error codes is returned.
 *
 * %-EIO - I/O error.
 *
 * %-ENOMEM - Insufficient amount of memory available.
 */
int nilfs_bmap_mark(struct nilfs_bmap *bmap, __u64 key, int level)
{
	int ret;

	if (bmap->b_ops->bop_mark == NULL)
		return 0;

	down_write(&bmap->b_sem);
	ret = bmap->b_ops->bop_mark(bmap, key, level);
	up_write(&bmap->b_sem);

	return nilfs_bmap_convert_error(bmap, __func__, ret);
}
示例#8
0
/**
 * nilfs_bmap_assign - assign a new block number to a block
 * @bmap: bmap
 * @bhp: pointer to buffer head
 * @blocknr: block number
 * @binfo: block information
 *
 * Description: nilfs_bmap_assign() assigns the block number @blocknr to the
 * buffer specified by @bh.
 *
 * Return Value: On success, 0 is returned and the buffer head of a newly
 * create buffer and the block information associated with the buffer are
 * stored in the place pointed by @bh and @binfo, respectively. On error, one
 * of the following negative error codes is returned.
 *
 * %-EIO - I/O error.
 *
 * %-ENOMEM - Insufficient amount of memory available.
 */
int nilfs_bmap_assign(struct nilfs_bmap *bmap,
		      struct buffer_head **bh,
		      unsigned long blocknr,
		      union nilfs_binfo *binfo)
{
	int ret;

	down_write(&bmap->b_sem);
	ret = bmap->b_ops->bop_assign(bmap, bh, blocknr, binfo);
	up_write(&bmap->b_sem);

	return nilfs_bmap_convert_error(bmap, __func__, ret);
}
示例#9
0
int nilfs_bmap_last_key(struct nilfs_bmap *bmap, unsigned long *key)
{
	__u64 lastkey;
	int ret;

	down_read(&bmap->b_sem);
	ret = bmap->b_ops->bop_last_key(bmap, &lastkey);
	up_read(&bmap->b_sem);

	if (ret < 0)
		ret = nilfs_bmap_convert_error(bmap, __func__, ret);
	else
		*key = lastkey;
	return ret;
}
示例#10
0
/**
 * nilfs_bmap_lookup_at_level - find a data block or node block
 * @bmap: bmap
 * @key: key
 * @level: level
 * @ptrp: place to store the value associated to @key
 *
 * Description: nilfs_bmap_lookup_at_level() finds a record whose key
 * matches @key in the block at @level of the bmap.
 *
 * Return Value: On success, 0 is returned and the record associated with @key
 * is stored in the place pointed by @ptrp. On error, one of the following
 * negative error codes is returned.
 *
 * %-EIO - I/O error.
 *
 * %-ENOMEM - Insufficient amount of memory available.
 *
 * %-ENOENT - A record associated with @key does not exist.
 */
int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level,
			       __u64 *ptrp)
{
	sector_t blocknr;
	int ret;

	down_read(&bmap->b_sem);
	ret = bmap->b_ops->bop_lookup(bmap, key, level, ptrp);
	if (ret < 0) {
		ret = nilfs_bmap_convert_error(bmap, __func__, ret);
		goto out;
	}
	if (NILFS_BMAP_USE_VBN(bmap)) {
		ret = nilfs_dat_translate(nilfs_bmap_get_dat(bmap), *ptrp,
					  &blocknr);
		if (!ret)
			*ptrp = blocknr;
	}

 out:
	up_read(&bmap->b_sem);
	return ret;
}