static int nilfs_bmap_do_truncate(struct nilfs_bmap *bmap, __u64 key) { __u64 lastkey; int ret; ret = bmap->b_ops->bop_last_key(bmap, &lastkey); if (ret < 0) { if (ret == -ENOENT) ret = 0; return ret; } while (key <= lastkey) { ret = nilfs_bmap_do_delete(bmap, lastkey); if (ret < 0) return ret; ret = bmap->b_ops->bop_last_key(bmap, &lastkey); if (ret < 0) { if (ret == -ENOENT) ret = 0; return ret; } } return 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 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, __u64 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); }