^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0+ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * mdt.h - NILFS meta data file prototype and definitions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Written by Ryusuke Konishi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifndef _NILFS_MDT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define _NILFS_MDT_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/blockgroup_lock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "nilfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "page.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * struct nilfs_shadow_map - shadow mapping of meta data file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * @bmap_store: shadow copy of bmap state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * @frozen_data: shadowed dirty data pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * @frozen_btnodes: shadowed dirty b-tree nodes' pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * @frozen_buffers: list of frozen buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct nilfs_shadow_map {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct nilfs_bmap_store bmap_store;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct address_space frozen_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct address_space frozen_btnodes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct list_head frozen_buffers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * struct nilfs_mdt_info - on-memory private data of meta data files
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * @mi_sem: reader/writer semaphore for meta data operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * @mi_bgl: per-blockgroup locking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * @mi_entry_size: size of an entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * @mi_first_entry_offset: offset to the first entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * @mi_entries_per_block: number of entries in a block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @mi_palloc_cache: persistent object allocator cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @mi_shadow: shadow of bmap and page caches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * @mi_blocks_per_group: number of blocks in a group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * @mi_blocks_per_desc_block: number of blocks per descriptor block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct nilfs_mdt_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct rw_semaphore mi_sem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct blockgroup_lock *mi_bgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unsigned int mi_entry_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) unsigned int mi_first_entry_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) unsigned long mi_entries_per_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct nilfs_palloc_cache *mi_palloc_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct nilfs_shadow_map *mi_shadow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) unsigned long mi_blocks_per_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned long mi_blocks_per_desc_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static inline int nilfs_is_metadata_file_inode(const struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return inode->i_private != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* Default GFP flags using highmem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define NILFS_MDT_GFP (__GFP_RECLAIM | __GFP_IO | __GFP_HIGHMEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int nilfs_mdt_get_block(struct inode *, unsigned long, int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) void (*init_block)(struct inode *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct buffer_head *, void *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int nilfs_mdt_find_block(struct inode *inode, unsigned long start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) unsigned long end, unsigned long *blkoff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct buffer_head **out_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int nilfs_mdt_delete_block(struct inode *, unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) int nilfs_mdt_forget_block(struct inode *, unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int nilfs_mdt_fetch_dirty(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) void nilfs_mdt_clear(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) void nilfs_mdt_destroy(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void nilfs_mdt_set_entry_size(struct inode *, unsigned int, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) int nilfs_mdt_setup_shadow_map(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct nilfs_shadow_map *shadow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int nilfs_mdt_save_to_shadow_map(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) void nilfs_mdt_restore_from_shadow_map(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) void nilfs_mdt_clear_shadow_map(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int nilfs_mdt_freeze_buffer(struct inode *inode, struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct buffer_head *nilfs_mdt_get_frozen_buffer(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static inline void nilfs_mdt_mark_dirty(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!test_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) set_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static inline void nilfs_mdt_clear_dirty(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) clear_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static inline __u64 nilfs_mdt_cno(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return ((struct the_nilfs *)inode->i_sb->s_fs_info)->ns_cno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static inline spinlock_t *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) nilfs_mdt_bgl_lock(struct inode *inode, unsigned int block_group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return bgl_lock_ptr(NILFS_MDT(inode)->mi_bgl, block_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #endif /* _NILFS_MDT_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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