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fd8c8caf7e
Fsyncer will wait on all dnode pages of regular writeback before flushing, if there are async dnode pages blocked by IO scheduler, it may decrease fsync's performance. In this patch, we choose to let f2fs_balance_fs_bg() to trigger checkpoint to flush these dnode pages of regular, so async IO of dnode page can be elimitnated, making fsyncer only need to wait for sync IO. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
459 lines
12 KiB
C
459 lines
12 KiB
C
/*
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* fs/f2fs/node.h
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* start node id of a node block dedicated to the given node id */
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#define START_NID(nid) (((nid) / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK)
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/* node block offset on the NAT area dedicated to the given start node id */
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#define NAT_BLOCK_OFFSET(start_nid) ((start_nid) / NAT_ENTRY_PER_BLOCK)
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/* # of pages to perform synchronous readahead before building free nids */
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#define FREE_NID_PAGES 8
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#define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)
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#define DEF_RA_NID_PAGES 0 /* # of nid pages to be readaheaded */
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/* maximum readahead size for node during getting data blocks */
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#define MAX_RA_NODE 128
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/* control the memory footprint threshold (10MB per 1GB ram) */
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#define DEF_RAM_THRESHOLD 1
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/* control dirty nats ratio threshold (default: 10% over max nid count) */
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#define DEF_DIRTY_NAT_RATIO_THRESHOLD 10
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/* control total # of nats */
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#define DEF_NAT_CACHE_THRESHOLD 100000
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/* vector size for gang look-up from nat cache that consists of radix tree */
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#define NATVEC_SIZE 64
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#define SETVEC_SIZE 32
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/* return value for read_node_page */
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#define LOCKED_PAGE 1
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/* For flag in struct node_info */
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enum {
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IS_CHECKPOINTED, /* is it checkpointed before? */
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HAS_FSYNCED_INODE, /* is the inode fsynced before? */
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HAS_LAST_FSYNC, /* has the latest node fsync mark? */
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IS_DIRTY, /* this nat entry is dirty? */
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IS_PREALLOC, /* nat entry is preallocated */
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};
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/*
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* For node information
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*/
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struct node_info {
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nid_t nid; /* node id */
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nid_t ino; /* inode number of the node's owner */
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block_t blk_addr; /* block address of the node */
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unsigned char version; /* version of the node */
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unsigned char flag; /* for node information bits */
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};
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struct nat_entry {
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struct list_head list; /* for clean or dirty nat list */
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struct node_info ni; /* in-memory node information */
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};
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#define nat_get_nid(nat) ((nat)->ni.nid)
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#define nat_set_nid(nat, n) ((nat)->ni.nid = (n))
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#define nat_get_blkaddr(nat) ((nat)->ni.blk_addr)
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#define nat_set_blkaddr(nat, b) ((nat)->ni.blk_addr = (b))
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#define nat_get_ino(nat) ((nat)->ni.ino)
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#define nat_set_ino(nat, i) ((nat)->ni.ino = (i))
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#define nat_get_version(nat) ((nat)->ni.version)
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#define nat_set_version(nat, v) ((nat)->ni.version = (v))
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#define inc_node_version(version) (++(version))
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static inline void copy_node_info(struct node_info *dst,
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struct node_info *src)
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{
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dst->nid = src->nid;
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dst->ino = src->ino;
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dst->blk_addr = src->blk_addr;
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dst->version = src->version;
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/* should not copy flag here */
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}
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static inline void set_nat_flag(struct nat_entry *ne,
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unsigned int type, bool set)
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{
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unsigned char mask = 0x01 << type;
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if (set)
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ne->ni.flag |= mask;
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else
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ne->ni.flag &= ~mask;
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}
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static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
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{
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unsigned char mask = 0x01 << type;
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return ne->ni.flag & mask;
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}
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static inline void nat_reset_flag(struct nat_entry *ne)
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{
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/* these states can be set only after checkpoint was done */
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set_nat_flag(ne, IS_CHECKPOINTED, true);
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set_nat_flag(ne, HAS_FSYNCED_INODE, false);
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set_nat_flag(ne, HAS_LAST_FSYNC, true);
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}
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static inline void node_info_from_raw_nat(struct node_info *ni,
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struct f2fs_nat_entry *raw_ne)
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{
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ni->ino = le32_to_cpu(raw_ne->ino);
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ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
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ni->version = raw_ne->version;
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}
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static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne,
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struct node_info *ni)
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{
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raw_ne->ino = cpu_to_le32(ni->ino);
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raw_ne->block_addr = cpu_to_le32(ni->blk_addr);
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raw_ne->version = ni->version;
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}
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static inline bool excess_dirty_nats(struct f2fs_sb_info *sbi)
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{
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return NM_I(sbi)->dirty_nat_cnt >= NM_I(sbi)->max_nid *
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NM_I(sbi)->dirty_nats_ratio / 100;
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}
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static inline bool excess_cached_nats(struct f2fs_sb_info *sbi)
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{
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return NM_I(sbi)->nat_cnt >= DEF_NAT_CACHE_THRESHOLD;
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}
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static inline bool excess_dirty_nodes(struct f2fs_sb_info *sbi)
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{
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return get_pages(sbi, F2FS_DIRTY_NODES) >= sbi->blocks_per_seg * 8;
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}
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enum mem_type {
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FREE_NIDS, /* indicates the free nid list */
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NAT_ENTRIES, /* indicates the cached nat entry */
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DIRTY_DENTS, /* indicates dirty dentry pages */
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INO_ENTRIES, /* indicates inode entries */
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EXTENT_CACHE, /* indicates extent cache */
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INMEM_PAGES, /* indicates inmemory pages */
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BASE_CHECK, /* check kernel status */
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};
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struct nat_entry_set {
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struct list_head set_list; /* link with other nat sets */
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struct list_head entry_list; /* link with dirty nat entries */
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nid_t set; /* set number*/
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unsigned int entry_cnt; /* the # of nat entries in set */
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};
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struct free_nid {
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struct list_head list; /* for free node id list */
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nid_t nid; /* node id */
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int state; /* in use or not: FREE_NID or PREALLOC_NID */
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};
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static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
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{
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struct f2fs_nm_info *nm_i = NM_I(sbi);
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struct free_nid *fnid;
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spin_lock(&nm_i->nid_list_lock);
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if (nm_i->nid_cnt[FREE_NID] <= 0) {
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spin_unlock(&nm_i->nid_list_lock);
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return;
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}
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fnid = list_first_entry(&nm_i->free_nid_list, struct free_nid, list);
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*nid = fnid->nid;
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spin_unlock(&nm_i->nid_list_lock);
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}
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/*
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* inline functions
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*/
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static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
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{
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struct f2fs_nm_info *nm_i = NM_I(sbi);
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#ifdef CONFIG_F2FS_CHECK_FS
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if (memcmp(nm_i->nat_bitmap, nm_i->nat_bitmap_mir,
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nm_i->bitmap_size))
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f2fs_bug_on(sbi, 1);
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#endif
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memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
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}
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static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
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{
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struct f2fs_nm_info *nm_i = NM_I(sbi);
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pgoff_t block_off;
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pgoff_t block_addr;
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/*
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* block_off = segment_off * 512 + off_in_segment
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* OLD = (segment_off * 512) * 2 + off_in_segment
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* NEW = 2 * (segment_off * 512 + off_in_segment) - off_in_segment
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*/
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block_off = NAT_BLOCK_OFFSET(start);
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block_addr = (pgoff_t)(nm_i->nat_blkaddr +
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(block_off << 1) -
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(block_off & (sbi->blocks_per_seg - 1)));
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if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
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block_addr += sbi->blocks_per_seg;
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return block_addr;
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}
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static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
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pgoff_t block_addr)
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{
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struct f2fs_nm_info *nm_i = NM_I(sbi);
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block_addr -= nm_i->nat_blkaddr;
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block_addr ^= 1 << sbi->log_blocks_per_seg;
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return block_addr + nm_i->nat_blkaddr;
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}
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static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
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{
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unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
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f2fs_change_bit(block_off, nm_i->nat_bitmap);
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#ifdef CONFIG_F2FS_CHECK_FS
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f2fs_change_bit(block_off, nm_i->nat_bitmap_mir);
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#endif
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}
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static inline nid_t ino_of_node(struct page *node_page)
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{
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struct f2fs_node *rn = F2FS_NODE(node_page);
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return le32_to_cpu(rn->footer.ino);
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}
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static inline nid_t nid_of_node(struct page *node_page)
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{
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struct f2fs_node *rn = F2FS_NODE(node_page);
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return le32_to_cpu(rn->footer.nid);
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}
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static inline unsigned int ofs_of_node(struct page *node_page)
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{
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struct f2fs_node *rn = F2FS_NODE(node_page);
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unsigned flag = le32_to_cpu(rn->footer.flag);
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return flag >> OFFSET_BIT_SHIFT;
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}
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static inline __u64 cpver_of_node(struct page *node_page)
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{
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struct f2fs_node *rn = F2FS_NODE(node_page);
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return le64_to_cpu(rn->footer.cp_ver);
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}
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static inline block_t next_blkaddr_of_node(struct page *node_page)
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{
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struct f2fs_node *rn = F2FS_NODE(node_page);
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return le32_to_cpu(rn->footer.next_blkaddr);
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}
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static inline void fill_node_footer(struct page *page, nid_t nid,
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nid_t ino, unsigned int ofs, bool reset)
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{
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struct f2fs_node *rn = F2FS_NODE(page);
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unsigned int old_flag = 0;
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if (reset)
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memset(rn, 0, sizeof(*rn));
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else
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old_flag = le32_to_cpu(rn->footer.flag);
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rn->footer.nid = cpu_to_le32(nid);
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rn->footer.ino = cpu_to_le32(ino);
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/* should remain old flag bits such as COLD_BIT_SHIFT */
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rn->footer.flag = cpu_to_le32((ofs << OFFSET_BIT_SHIFT) |
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(old_flag & OFFSET_BIT_MASK));
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}
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static inline void copy_node_footer(struct page *dst, struct page *src)
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{
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struct f2fs_node *src_rn = F2FS_NODE(src);
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struct f2fs_node *dst_rn = F2FS_NODE(dst);
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memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
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}
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static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
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{
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struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
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struct f2fs_node *rn = F2FS_NODE(page);
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__u64 cp_ver = cur_cp_version(ckpt);
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if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
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cp_ver |= (cur_cp_crc(ckpt) << 32);
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rn->footer.cp_ver = cpu_to_le64(cp_ver);
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rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
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}
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static inline bool is_recoverable_dnode(struct page *page)
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{
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struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
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__u64 cp_ver = cur_cp_version(ckpt);
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/* Don't care crc part, if fsck.f2fs sets it. */
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if (__is_set_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG))
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return (cp_ver << 32) == (cpver_of_node(page) << 32);
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if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
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cp_ver |= (cur_cp_crc(ckpt) << 32);
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return cp_ver == cpver_of_node(page);
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}
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/*
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* f2fs assigns the following node offsets described as (num).
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* N = NIDS_PER_BLOCK
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*
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* Inode block (0)
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* |- direct node (1)
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* |- direct node (2)
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* |- indirect node (3)
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* | `- direct node (4 => 4 + N - 1)
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* |- indirect node (4 + N)
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* | `- direct node (5 + N => 5 + 2N - 1)
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* `- double indirect node (5 + 2N)
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* `- indirect node (6 + 2N)
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* `- direct node
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* ......
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* `- indirect node ((6 + 2N) + x(N + 1))
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* `- direct node
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* ......
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* `- indirect node ((6 + 2N) + (N - 1)(N + 1))
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* `- direct node
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*/
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static inline bool IS_DNODE(struct page *node_page)
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{
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unsigned int ofs = ofs_of_node(node_page);
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if (f2fs_has_xattr_block(ofs))
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return true;
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if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
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ofs == 5 + 2 * NIDS_PER_BLOCK)
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return false;
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if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
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ofs -= 6 + 2 * NIDS_PER_BLOCK;
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if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
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return false;
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}
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return true;
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}
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static inline int set_nid(struct page *p, int off, nid_t nid, bool i)
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{
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struct f2fs_node *rn = F2FS_NODE(p);
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f2fs_wait_on_page_writeback(p, NODE, true);
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if (i)
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rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
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else
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rn->in.nid[off] = cpu_to_le32(nid);
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return set_page_dirty(p);
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}
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static inline nid_t get_nid(struct page *p, int off, bool i)
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{
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struct f2fs_node *rn = F2FS_NODE(p);
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if (i)
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return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
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return le32_to_cpu(rn->in.nid[off]);
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}
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/*
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* Coldness identification:
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* - Mark cold files in f2fs_inode_info
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* - Mark cold node blocks in their node footer
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* - Mark cold data pages in page cache
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*/
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static inline int is_cold_data(struct page *page)
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{
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return PageChecked(page);
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}
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static inline void set_cold_data(struct page *page)
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{
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SetPageChecked(page);
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}
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static inline void clear_cold_data(struct page *page)
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{
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ClearPageChecked(page);
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}
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static inline int is_node(struct page *page, int type)
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{
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struct f2fs_node *rn = F2FS_NODE(page);
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return le32_to_cpu(rn->footer.flag) & (1 << type);
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}
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#define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
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#define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
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#define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
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static inline int is_inline_node(struct page *page)
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{
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return PageChecked(page);
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}
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static inline void set_inline_node(struct page *page)
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{
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SetPageChecked(page);
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}
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static inline void clear_inline_node(struct page *page)
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{
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ClearPageChecked(page);
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}
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static inline void set_cold_node(struct page *page, bool is_dir)
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{
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struct f2fs_node *rn = F2FS_NODE(page);
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unsigned int flag = le32_to_cpu(rn->footer.flag);
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if (is_dir)
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flag &= ~(0x1 << COLD_BIT_SHIFT);
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else
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flag |= (0x1 << COLD_BIT_SHIFT);
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rn->footer.flag = cpu_to_le32(flag);
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}
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static inline void set_mark(struct page *page, int mark, int type)
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{
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struct f2fs_node *rn = F2FS_NODE(page);
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unsigned int flag = le32_to_cpu(rn->footer.flag);
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if (mark)
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flag |= (0x1 << type);
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else
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flag &= ~(0x1 << type);
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rn->footer.flag = cpu_to_le32(flag);
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#ifdef CONFIG_F2FS_CHECK_FS
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f2fs_inode_chksum_set(F2FS_P_SB(page), page);
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#endif
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}
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#define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
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#define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)
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