/**
* 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);
}
/**
* 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);
}
/**
* 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);
}
/**
* 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);
}
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);
}
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;
}
/**
* 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);
}
/**
* 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);
}
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;
}
/**
* 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;
}