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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227/* 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);
void ocfs2_suballoc_reclaim_worker(struct work_struct *work);
/* * 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_ */