/* SPDX-License-Identifier: GPL-2.0 */ /* * fs/f2fs/node.h * * Copyright (c) 2012 Samsung Electronics Co., Ltd. * http://www.samsung.com/ */ /* start node id of a node block dedicated to the given node id */ #define START_NID(nid) … /* node block offset on the NAT area dedicated to the given start node id */ #define NAT_BLOCK_OFFSET(start_nid) … /* # of pages to perform synchronous readahead before building free nids */ #define FREE_NID_PAGES … #define MAX_FREE_NIDS … /* size of free nid batch when shrinking */ #define SHRINK_NID_BATCH_SIZE … #define DEF_RA_NID_PAGES … /* maximum readahead size for node during getting data blocks */ #define MAX_RA_NODE … /* control the memory footprint threshold (10MB per 1GB ram) */ #define DEF_RAM_THRESHOLD … /* control dirty nats ratio threshold (default: 10% over max nid count) */ #define DEF_DIRTY_NAT_RATIO_THRESHOLD … /* control total # of nats */ #define DEF_NAT_CACHE_THRESHOLD … /* control total # of node writes used for roll-fowrad recovery */ #define DEF_RF_NODE_BLOCKS … /* vector size for gang look-up from nat cache that consists of radix tree */ #define NAT_VEC_SIZE … /* return value for read_node_page */ #define LOCKED_PAGE … /* check pinned file's alignment status of physical blocks */ #define FILE_NOT_ALIGNED … /* For flag in struct node_info */ enum { … }; /* * For node information */ struct node_info { … }; struct nat_entry { … }; #define nat_get_nid(nat) … #define nat_set_nid(nat, n) … #define nat_get_blkaddr(nat) … #define nat_set_blkaddr(nat, b) … #define nat_get_ino(nat) … #define nat_set_ino(nat, i) … #define nat_get_version(nat) … #define nat_set_version(nat, v) … #define inc_node_version(version) … static inline void copy_node_info(struct node_info *dst, struct node_info *src) { … } static inline void set_nat_flag(struct nat_entry *ne, unsigned int type, bool set) { … } static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type) { … } static inline void nat_reset_flag(struct nat_entry *ne) { … } static inline void node_info_from_raw_nat(struct node_info *ni, struct f2fs_nat_entry *raw_ne) { … } static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne, struct node_info *ni) { … } static inline bool excess_dirty_nats(struct f2fs_sb_info *sbi) { … } static inline bool excess_cached_nats(struct f2fs_sb_info *sbi) { … } enum mem_type { … }; struct nat_entry_set { … }; struct free_nid { … }; static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid) { … } /* * inline functions */ static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr) { … } static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start) { … } static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi, pgoff_t block_addr) { … } static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid) { … } static inline nid_t ino_of_node(struct page *node_page) { … } static inline nid_t nid_of_node(struct page *node_page) { … } static inline unsigned int ofs_of_node(struct page *node_page) { … } static inline __u64 cpver_of_node(struct page *node_page) { … } static inline block_t next_blkaddr_of_node(struct page *node_page) { … } static inline void fill_node_footer(struct page *page, nid_t nid, nid_t ino, unsigned int ofs, bool reset) { … } static inline void copy_node_footer(struct page *dst, struct page *src) { … } static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr) { … } static inline bool is_recoverable_dnode(struct page *page) { … } /* * f2fs assigns the following node offsets described as (num). * N = NIDS_PER_BLOCK * * Inode block (0) * |- direct node (1) * |- direct node (2) * |- indirect node (3) * | `- direct node (4 => 4 + N - 1) * |- indirect node (4 + N) * | `- direct node (5 + N => 5 + 2N - 1) * `- double indirect node (5 + 2N) * `- indirect node (6 + 2N) * `- direct node * ...... * `- indirect node ((6 + 2N) + x(N + 1)) * `- direct node * ...... * `- indirect node ((6 + 2N) + (N - 1)(N + 1)) * `- direct node */ static inline bool IS_DNODE(struct page *node_page) { … } static inline int set_nid(struct page *p, int off, nid_t nid, bool i) { … } static inline nid_t get_nid(struct page *p, int off, bool i) { … } /* * Coldness identification: * - Mark cold files in f2fs_inode_info * - Mark cold node blocks in their node footer * - Mark cold data pages in page cache */ static inline int is_node(struct page *page, int type) { … } #define is_cold_node(page) … #define is_fsync_dnode(page) … #define is_dent_dnode(page) … static inline void set_cold_node(struct page *page, bool is_dir) { … } static inline void set_mark(struct page *page, int mark, int type) { … } #define set_dentry_mark(page, mark) … #define set_fsync_mark(page, mark) …
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