/* SPDX-License-Identifier: GPL-2.0-or-later *//* * suballoc.h * * Defines sub allocator api * * Copyright (C) 2003, 2004 Oracle. All rights reserved. */ #ifndef _CHAINALLOC_H_#define _CHAINALLOC_H_ struct ocfs2_suballoc_result;typedef int (group_search_t)(struct inode *, struct buffer_head *, 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#define OCFS2_AC_USE_MAIN 2#define OCFS2_AC_USE_INODE 3#define OCFS2_AC_USE_META 4#define OCFS2_AC_USE_MAIN_DISCONTIG 5 u32 ac_which; /* these are used by the chain search */ u16 ac_chain; 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 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_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_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);u16 ocfs2_find_max_contig_free_bits(void *bitmap, u16 total_bits, u16 start);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, unsigned int max_contig_bits, int fastpath); 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(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(handle_t *handle, struct ocfs2_alloc_context *ac, u32 min_clusters, u32 *cluster_start, u32 *num_clusters);/* * Use this variant of ocfs2_claim_clusters to specify a maximum * number of clusters smaller than the allocation reserved. */int __ocfs2_claim_clusters(handle_t *handle, struct ocfs2_alloc_context *ac, u32 min_clusters, u32 max_clusters, u32 *cluster_start, u32 *num_clusters); int ocfs2_free_suballoc_bits(handle_t *handle, struct inode *alloc_inode, struct buffer_head *alloc_bh, unsigned int start_bit, u64 bg_blkno, unsigned int count);int ocfs2_free_dinode(handle_t *handle, struct inode *inode_alloc_inode, struct buffer_head *inode_alloc_bh, struct ocfs2_dinode *di);int ocfs2_free_clusters(handle_t *handle, struct inode *bitmap_inode, 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){ u64 group = block - (u64) bit; return group;} static inline u32 ocfs2_cluster_from_desc(struct ocfs2_super *osb, u64 bg_blkno){ /* This should work for all block group descriptors as only * the 1st group descriptor of the cluster bitmap is * different. */ if (bg_blkno == osb->first_cluster_group_blkno) return 0; /* the rest of the block groups are located at the beginning * of their 1st cluster, so a direct translation just * works. */ return ocfs2_blocks_to_clusters(osb->sb, bg_blkno);} static inline int ocfs2_is_cluster_bitmap(struct inode *inode){ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); return osb->bitmap_blkno == OCFS2_I(inode)->ip_blkno;} /* This is for local alloc ONLY. Others should use the task-specific * 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); /* * 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 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_ */
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* suballoc.h
*
* Defines sub allocator api
*
* Copyright (C) 2003, 2004 Oracle. All rights reserved.
*/
#ifndef _CHAINALLOC_H_
#define _CHAINALLOC_H_
struct ocfs2_suballoc_result;
typedef int (group_search_t)(struct inode *,
struct buffer_head *,
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
#define OCFS2_AC_USE_MAIN 2
#define OCFS2_AC_USE_INODE 3
#define OCFS2_AC_USE_META 4
#define OCFS2_AC_USE_MAIN_DISCONTIG 5
u32 ac_which;
/* these are used by the chain search */
u16 ac_chain;
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
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_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_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);
u16 ocfs2_find_max_contig_free_bits(void *bitmap,
u16 total_bits, u16 start);
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,
unsigned int max_contig_bits,
int fastpath);
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(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(handle_t *handle,
struct ocfs2_alloc_context *ac,
u32 min_clusters,
u32 *cluster_start,
u32 *num_clusters);
/*
* Use this variant of ocfs2_claim_clusters to specify a maximum
* number of clusters smaller than the allocation reserved.
*/
int __ocfs2_claim_clusters(handle_t *handle,
struct ocfs2_alloc_context *ac,
u32 min_clusters,
u32 max_clusters,
u32 *cluster_start,
u32 *num_clusters);
int ocfs2_free_suballoc_bits(handle_t *handle,
struct inode *alloc_inode,
struct buffer_head *alloc_bh,
unsigned int start_bit,
u64 bg_blkno,
unsigned int count);
int ocfs2_free_dinode(handle_t *handle,
struct inode *inode_alloc_inode,
struct buffer_head *inode_alloc_bh,
struct ocfs2_dinode *di);
int ocfs2_free_clusters(handle_t *handle,
struct inode *bitmap_inode,
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)
{
u64 group = block - (u64) bit;
return group;
}
static inline u32 ocfs2_cluster_from_desc(struct ocfs2_super *osb,
u64 bg_blkno)
{
/* This should work for all block group descriptors as only
* the 1st group descriptor of the cluster bitmap is
* different. */
if (bg_blkno == osb->first_cluster_group_blkno)
return 0;
/* the rest of the block groups are located at the beginning
* of their 1st cluster, so a direct translation just
* works. */
return ocfs2_blocks_to_clusters(osb->sb, bg_blkno);
}
static inline int ocfs2_is_cluster_bitmap(struct inode *inode)
{
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
return osb->bitmap_blkno == OCFS2_I(inode)->ip_blkno;
}
/* This is for local alloc ONLY. Others should use the task-specific
* 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);
/*
* 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 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_ */