diff options
Diffstat (limited to 'fs/ocfs2/suballoc.h')
| -rw-r--r-- | fs/ocfs2/suballoc.h | 109 |
1 files changed, 94 insertions, 15 deletions
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h index 8799033bb45..2d2501767c0 100644 --- a/fs/ocfs2/suballoc.h +++ b/fs/ocfs2/suballoc.h @@ -26,16 +26,19 @@ #ifndef _CHAINALLOC_H_ #define _CHAINALLOC_H_ +struct ocfs2_suballoc_result; typedef int (group_search_t)(struct inode *, struct buffer_head *, - u32, - u32, - u16 *, - u16 *); + u32, /* bits_wanted */ + u32, /* min_bits */ + u64, /* max_block */ + struct ocfs2_suballoc_result *); + /* found bits */ struct ocfs2_alloc_context { struct inode *ac_inode; /* which bitmap are we allocating from? */ struct buffer_head *ac_bh; /* file entry bh */ + u32 ac_alloc_slot; /* which slot are we allocating from? */ u32 ac_bits_wanted; u32 ac_bits_given; #define OCFS2_AC_USE_LOCAL 1 @@ -46,41 +49,74 @@ struct ocfs2_alloc_context { /* these are used by the chain search */ u16 ac_chain; - int ac_allow_chain_relink; + int ac_disable_chain_relink; group_search_t *ac_group_search; u64 ac_last_group; + u64 ac_max_block; /* Highest block number to allocate. 0 is + is the same as ~0 - unlimited */ + + int ac_find_loc_only; /* hack for reflink operation ordering */ + struct ocfs2_suballoc_result *ac_find_loc_priv; /* */ + + struct ocfs2_alloc_reservation *ac_resv; }; +void ocfs2_init_steal_slots(struct ocfs2_super *osb); void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac); static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac) { return ac->ac_bits_wanted - ac->ac_bits_given; } +/* + * Please note that the caller must make sure that root_el is the root + * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise + * the result may be wrong. + */ int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, - struct ocfs2_dinode *fe, + struct ocfs2_extent_list *root_el, struct ocfs2_alloc_context **ac); +int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, + int blocks, + struct ocfs2_alloc_context **ac); int ocfs2_reserve_new_inode(struct ocfs2_super *osb, struct ocfs2_alloc_context **ac); int ocfs2_reserve_clusters(struct ocfs2_super *osb, u32 bits_wanted, struct ocfs2_alloc_context **ac); -int ocfs2_claim_metadata(struct ocfs2_super *osb, +int ocfs2_alloc_dinode_update_counts(struct inode *inode, handle_t *handle, + struct buffer_head *di_bh, + u32 num_bits, + u16 chain); +void ocfs2_rollback_alloc_dinode_counts(struct inode *inode, + struct buffer_head *di_bh, + u32 num_bits, + u16 chain); +int ocfs2_block_group_set_bits(handle_t *handle, + struct inode *alloc_inode, + struct ocfs2_group_desc *bg, + struct buffer_head *group_bh, + unsigned int bit_off, + unsigned int num_bits); + +int ocfs2_claim_metadata(handle_t *handle, struct ocfs2_alloc_context *ac, u32 bits_wanted, + u64 *suballoc_loc, u16 *suballoc_bit_start, u32 *num_bits, u64 *blkno_start); -int ocfs2_claim_new_inode(struct ocfs2_super *osb, - handle_t *handle, +int ocfs2_claim_new_inode(handle_t *handle, + struct inode *dir, + struct buffer_head *parent_fe_bh, struct ocfs2_alloc_context *ac, + u64 *suballoc_loc, u16 *suballoc_bit, u64 *fe_blkno); -int ocfs2_claim_clusters(struct ocfs2_super *osb, - handle_t *handle, +int ocfs2_claim_clusters(handle_t *handle, struct ocfs2_alloc_context *ac, u32 min_clusters, u32 *cluster_start, @@ -89,8 +125,7 @@ int ocfs2_claim_clusters(struct ocfs2_super *osb, * Use this variant of ocfs2_claim_clusters to specify a maxiumum * number of clusters smaller than the allocation reserved. */ -int __ocfs2_claim_clusters(struct ocfs2_super *osb, - handle_t *handle, +int __ocfs2_claim_clusters(handle_t *handle, struct ocfs2_alloc_context *ac, u32 min_clusters, u32 max_clusters, @@ -112,6 +147,11 @@ int ocfs2_free_clusters(handle_t *handle, struct buffer_head *bitmap_bh, u64 start_blk, unsigned int num_clusters); +int ocfs2_release_clusters(handle_t *handle, + struct inode *bitmap_inode, + struct buffer_head *bitmap_bh, + u64 start_blk, + unsigned int num_clusters); static inline u64 ocfs2_which_suballoc_group(u64 block, unsigned int bit) { @@ -146,13 +186,52 @@ static inline int ocfs2_is_cluster_bitmap(struct inode *inode) * apis above. */ int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, struct ocfs2_alloc_context *ac); +void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac); /* given a cluster offset, calculate which block group it belongs to * and return that block offset. */ u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster); -/* somewhat more expensive than our other checks, so use sparingly. */ +/* + * By default, ocfs2_read_group_descriptor() calls ocfs2_error() when it + * finds a problem. A caller that wants to check a group descriptor + * without going readonly should read the block with ocfs2_read_block[s]() + * and then checking it with this function. This is only resize, really. + * Everyone else should be using ocfs2_read_group_descriptor(). + */ int ocfs2_check_group_descriptor(struct super_block *sb, struct ocfs2_dinode *di, - struct ocfs2_group_desc *gd); + struct buffer_head *bh); +/* + * Read a group descriptor block into *bh. If *bh is NULL, a bh will be + * allocated. This is a cached read. The descriptor will be validated with + * ocfs2_validate_group_descriptor(). + */ +int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, + u64 gd_blkno, struct buffer_head **bh); + +int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_extent_tree *et, + u32 clusters_to_add, u32 extents_to_split, + struct ocfs2_alloc_context **data_ac, + struct ocfs2_alloc_context **meta_ac); + +int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res); + + + +/* + * The following two interfaces are for ocfs2_create_inode_in_orphan(). + */ +int ocfs2_find_new_inode_loc(struct inode *dir, + struct buffer_head *parent_fe_bh, + struct ocfs2_alloc_context *ac, + u64 *fe_blkno); + +int ocfs2_claim_new_inode_at_loc(handle_t *handle, + struct inode *dir, + struct ocfs2_alloc_context *ac, + u64 *suballoc_loc, + u16 *suballoc_bit, + u64 di_blkno); + #endif /* _CHAINALLOC_H_ */ |