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![Chao Yu](/assets/img/avatar_default.png)
https://bugzilla.kernel.org/show_bug.cgi?id=204137
With below script, we will hit panic during new segment allocation:
DISK=bingo.img
MOUNT_DIR=/mnt/f2fs
dd if=/dev/zero of=$DISK bs=1M count=105
mkfs.f2fe -a 1 -o 19 -t 1 -z 1 -f -q $DISK
mount -t f2fs $DISK $MOUNT_DIR -o "noinline_dentry,flush_merge,noextent_cache,mode=lfs,io_bits=7,fsync_mode=strict"
for (( i = 0; i < 4096; i++ )); do
name=`head /dev/urandom | tr -dc A-Za-z0-9 | head -c 10`
mkdir $MOUNT_DIR/$name
done
umount $MOUNT_DIR
rm $DISK
--- Core dump ---
Call Trace:
allocate_segment_by_default+0x9d/0x100 [f2fs]
f2fs_allocate_data_block+0x3c0/0x5c0 [f2fs]
do_write_page+0x62/0x110 [f2fs]
f2fs_outplace_write_data+0x43/0xc0 [f2fs]
f2fs_do_write_data_page+0x386/0x560 [f2fs]
__write_data_page+0x706/0x850 [f2fs]
f2fs_write_cache_pages+0x267/0x6a0 [f2fs]
f2fs_write_data_pages+0x19c/0x2e0 [f2fs]
do_writepages+0x1c/0x70
__filemap_fdatawrite_range+0xaa/0xe0
filemap_fdatawrite+0x1f/0x30
f2fs_sync_dirty_inodes+0x74/0x1f0 [f2fs]
block_operations+0xdc/0x350 [f2fs]
f2fs_write_checkpoint+0x104/0x1150 [f2fs]
f2fs_sync_fs+0xa2/0x120 [f2fs]
f2fs_balance_fs_bg+0x33c/0x390 [f2fs]
f2fs_write_node_pages+0x4c/0x1f0 [f2fs]
do_writepages+0x1c/0x70
__writeback_single_inode+0x45/0x320
writeback_sb_inodes+0x273/0x5c0
wb_writeback+0xff/0x2e0
wb_workfn+0xa1/0x370
process_one_work+0x138/0x350
worker_thread+0x4d/0x3d0
kthread+0x109/0x140
ret_from_fork+0x25/0x30
The root cause here is, with IO alignment feature enables, in worst
case, we need F2FS_IO_SIZE() free blocks space for single one 4k write
due to IO alignment feature will fill dummy pages to make IO being
aligned.
So we will easily run out of free segments during non-inline directory's
data writeback, even in process of foreground GC.
In order to fix this issue, I just propose to reserve additional free
space for IO alignment feature to handle worst case of free space usage
ratio during FGGC.
Fixes: 0a595ebaaa
("f2fs: support IO alignment for DATA and NODE writes")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
915 lines
28 KiB
C
915 lines
28 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* fs/f2fs/segment.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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#include <linux/blkdev.h>
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#include <linux/backing-dev.h>
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/* constant macro */
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#define NULL_SEGNO ((unsigned int)(~0))
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#define NULL_SECNO ((unsigned int)(~0))
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#define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */
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#define DEF_MAX_RECLAIM_PREFREE_SEGMENTS 4096 /* 8GB in maximum */
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#define F2FS_MIN_SEGMENTS 9 /* SB + 2 (CP + SIT + NAT) + SSA + MAIN */
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#define F2FS_MIN_META_SEGMENTS 8 /* SB + 2 (CP + SIT + NAT) + SSA */
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/* L: Logical segment # in volume, R: Relative segment # in main area */
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#define GET_L2R_SEGNO(free_i, segno) ((segno) - (free_i)->start_segno)
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#define GET_R2L_SEGNO(free_i, segno) ((segno) + (free_i)->start_segno)
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#define IS_DATASEG(t) ((t) <= CURSEG_COLD_DATA)
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#define IS_NODESEG(t) ((t) >= CURSEG_HOT_NODE && (t) <= CURSEG_COLD_NODE)
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static inline void sanity_check_seg_type(struct f2fs_sb_info *sbi,
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unsigned short seg_type)
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{
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f2fs_bug_on(sbi, seg_type >= NR_PERSISTENT_LOG);
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}
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#define IS_HOT(t) ((t) == CURSEG_HOT_NODE || (t) == CURSEG_HOT_DATA)
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#define IS_WARM(t) ((t) == CURSEG_WARM_NODE || (t) == CURSEG_WARM_DATA)
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#define IS_COLD(t) ((t) == CURSEG_COLD_NODE || (t) == CURSEG_COLD_DATA)
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#define IS_CURSEG(sbi, seg) \
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(((seg) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \
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((seg) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \
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((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \
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((seg) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \
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((seg) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \
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((seg) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno) || \
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((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA_PINNED)->segno) || \
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((seg) == CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC)->segno))
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#define IS_CURSEC(sbi, secno) \
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(((secno) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \
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(sbi)->segs_per_sec) || \
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((secno) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \
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(sbi)->segs_per_sec) || \
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((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \
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(sbi)->segs_per_sec) || \
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((secno) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \
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(sbi)->segs_per_sec) || \
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((secno) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \
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(sbi)->segs_per_sec) || \
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((secno) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \
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(sbi)->segs_per_sec) || \
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((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA_PINNED)->segno / \
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(sbi)->segs_per_sec) || \
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((secno) == CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC)->segno / \
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(sbi)->segs_per_sec))
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#define MAIN_BLKADDR(sbi) \
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(SM_I(sbi) ? SM_I(sbi)->main_blkaddr : \
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le32_to_cpu(F2FS_RAW_SUPER(sbi)->main_blkaddr))
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#define SEG0_BLKADDR(sbi) \
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(SM_I(sbi) ? SM_I(sbi)->seg0_blkaddr : \
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le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment0_blkaddr))
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#define MAIN_SEGS(sbi) (SM_I(sbi)->main_segments)
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#define MAIN_SECS(sbi) ((sbi)->total_sections)
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#define TOTAL_SEGS(sbi) \
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(SM_I(sbi) ? SM_I(sbi)->segment_count : \
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le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count))
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#define TOTAL_BLKS(sbi) (TOTAL_SEGS(sbi) << (sbi)->log_blocks_per_seg)
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#define MAX_BLKADDR(sbi) (SEG0_BLKADDR(sbi) + TOTAL_BLKS(sbi))
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#define SEGMENT_SIZE(sbi) (1ULL << ((sbi)->log_blocksize + \
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(sbi)->log_blocks_per_seg))
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#define START_BLOCK(sbi, segno) (SEG0_BLKADDR(sbi) + \
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(GET_R2L_SEGNO(FREE_I(sbi), segno) << (sbi)->log_blocks_per_seg))
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#define NEXT_FREE_BLKADDR(sbi, curseg) \
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(START_BLOCK(sbi, (curseg)->segno) + (curseg)->next_blkoff)
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#define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) ((blk_addr) - SEG0_BLKADDR(sbi))
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#define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \
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(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> (sbi)->log_blocks_per_seg)
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#define GET_BLKOFF_FROM_SEG0(sbi, blk_addr) \
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(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & ((sbi)->blocks_per_seg - 1))
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#define GET_SEGNO(sbi, blk_addr) \
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((!__is_valid_data_blkaddr(blk_addr)) ? \
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NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \
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GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
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#define BLKS_PER_SEC(sbi) \
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((sbi)->segs_per_sec * (sbi)->blocks_per_seg)
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#define GET_SEC_FROM_SEG(sbi, segno) \
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(((segno) == -1) ? -1: (segno) / (sbi)->segs_per_sec)
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#define GET_SEG_FROM_SEC(sbi, secno) \
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((secno) * (sbi)->segs_per_sec)
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#define GET_ZONE_FROM_SEC(sbi, secno) \
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(((secno) == -1) ? -1: (secno) / (sbi)->secs_per_zone)
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#define GET_ZONE_FROM_SEG(sbi, segno) \
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GET_ZONE_FROM_SEC(sbi, GET_SEC_FROM_SEG(sbi, segno))
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#define GET_SUM_BLOCK(sbi, segno) \
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((sbi)->sm_info->ssa_blkaddr + (segno))
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#define GET_SUM_TYPE(footer) ((footer)->entry_type)
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#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = (type))
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#define SIT_ENTRY_OFFSET(sit_i, segno) \
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((segno) % (sit_i)->sents_per_block)
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#define SIT_BLOCK_OFFSET(segno) \
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((segno) / SIT_ENTRY_PER_BLOCK)
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#define START_SEGNO(segno) \
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(SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK)
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#define SIT_BLK_CNT(sbi) \
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DIV_ROUND_UP(MAIN_SEGS(sbi), SIT_ENTRY_PER_BLOCK)
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#define f2fs_bitmap_size(nr) \
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(BITS_TO_LONGS(nr) * sizeof(unsigned long))
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#define SECTOR_FROM_BLOCK(blk_addr) \
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(((sector_t)blk_addr) << F2FS_LOG_SECTORS_PER_BLOCK)
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#define SECTOR_TO_BLOCK(sectors) \
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((sectors) >> F2FS_LOG_SECTORS_PER_BLOCK)
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/*
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* indicate a block allocation direction: RIGHT and LEFT.
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* RIGHT means allocating new sections towards the end of volume.
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* LEFT means the opposite direction.
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*/
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enum {
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ALLOC_RIGHT = 0,
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ALLOC_LEFT
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};
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/*
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* In the victim_sel_policy->alloc_mode, there are three block allocation modes.
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* LFS writes data sequentially with cleaning operations.
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* SSR (Slack Space Recycle) reuses obsolete space without cleaning operations.
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* AT_SSR (Age Threshold based Slack Space Recycle) merges fragments into
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* fragmented segment which has similar aging degree.
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*/
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enum {
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LFS = 0,
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SSR,
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AT_SSR,
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};
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/*
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* In the victim_sel_policy->gc_mode, there are three gc, aka cleaning, modes.
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* GC_CB is based on cost-benefit algorithm.
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* GC_GREEDY is based on greedy algorithm.
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* GC_AT is based on age-threshold algorithm.
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*/
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enum {
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GC_CB = 0,
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GC_GREEDY,
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GC_AT,
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ALLOC_NEXT,
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FLUSH_DEVICE,
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MAX_GC_POLICY,
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};
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/*
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* BG_GC means the background cleaning job.
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* FG_GC means the on-demand cleaning job.
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*/
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enum {
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BG_GC = 0,
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FG_GC,
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};
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/* for a function parameter to select a victim segment */
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struct victim_sel_policy {
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int alloc_mode; /* LFS or SSR */
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int gc_mode; /* GC_CB or GC_GREEDY */
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unsigned long *dirty_bitmap; /* dirty segment/section bitmap */
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unsigned int max_search; /*
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* maximum # of segments/sections
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* to search
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*/
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unsigned int offset; /* last scanned bitmap offset */
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unsigned int ofs_unit; /* bitmap search unit */
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unsigned int min_cost; /* minimum cost */
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unsigned long long oldest_age; /* oldest age of segments having the same min cost */
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unsigned int min_segno; /* segment # having min. cost */
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unsigned long long age; /* mtime of GCed section*/
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unsigned long long age_threshold;/* age threshold */
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};
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struct seg_entry {
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unsigned int type:6; /* segment type like CURSEG_XXX_TYPE */
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unsigned int valid_blocks:10; /* # of valid blocks */
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unsigned int ckpt_valid_blocks:10; /* # of valid blocks last cp */
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unsigned int padding:6; /* padding */
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unsigned char *cur_valid_map; /* validity bitmap of blocks */
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#ifdef CONFIG_F2FS_CHECK_FS
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unsigned char *cur_valid_map_mir; /* mirror of current valid bitmap */
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#endif
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/*
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* # of valid blocks and the validity bitmap stored in the last
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* checkpoint pack. This information is used by the SSR mode.
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*/
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unsigned char *ckpt_valid_map; /* validity bitmap of blocks last cp */
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unsigned char *discard_map;
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unsigned long long mtime; /* modification time of the segment */
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};
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struct sec_entry {
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unsigned int valid_blocks; /* # of valid blocks in a section */
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};
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struct segment_allocation {
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void (*allocate_segment)(struct f2fs_sb_info *, int, bool);
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};
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#define MAX_SKIP_GC_COUNT 16
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struct inmem_pages {
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struct list_head list;
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struct page *page;
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block_t old_addr; /* for revoking when fail to commit */
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};
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struct sit_info {
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const struct segment_allocation *s_ops;
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block_t sit_base_addr; /* start block address of SIT area */
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block_t sit_blocks; /* # of blocks used by SIT area */
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block_t written_valid_blocks; /* # of valid blocks in main area */
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char *bitmap; /* all bitmaps pointer */
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char *sit_bitmap; /* SIT bitmap pointer */
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#ifdef CONFIG_F2FS_CHECK_FS
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char *sit_bitmap_mir; /* SIT bitmap mirror */
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/* bitmap of segments to be ignored by GC in case of errors */
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unsigned long *invalid_segmap;
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#endif
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unsigned int bitmap_size; /* SIT bitmap size */
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unsigned long *tmp_map; /* bitmap for temporal use */
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unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */
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unsigned int dirty_sentries; /* # of dirty sentries */
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unsigned int sents_per_block; /* # of SIT entries per block */
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struct rw_semaphore sentry_lock; /* to protect SIT cache */
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struct seg_entry *sentries; /* SIT segment-level cache */
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struct sec_entry *sec_entries; /* SIT section-level cache */
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/* for cost-benefit algorithm in cleaning procedure */
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unsigned long long elapsed_time; /* elapsed time after mount */
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unsigned long long mounted_time; /* mount time */
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unsigned long long min_mtime; /* min. modification time */
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unsigned long long max_mtime; /* max. modification time */
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unsigned long long dirty_min_mtime; /* rerange candidates in GC_AT */
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unsigned long long dirty_max_mtime; /* rerange candidates in GC_AT */
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unsigned int last_victim[MAX_GC_POLICY]; /* last victim segment # */
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};
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struct free_segmap_info {
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unsigned int start_segno; /* start segment number logically */
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unsigned int free_segments; /* # of free segments */
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unsigned int free_sections; /* # of free sections */
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spinlock_t segmap_lock; /* free segmap lock */
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unsigned long *free_segmap; /* free segment bitmap */
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unsigned long *free_secmap; /* free section bitmap */
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};
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/* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */
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enum dirty_type {
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DIRTY_HOT_DATA, /* dirty segments assigned as hot data logs */
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DIRTY_WARM_DATA, /* dirty segments assigned as warm data logs */
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DIRTY_COLD_DATA, /* dirty segments assigned as cold data logs */
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DIRTY_HOT_NODE, /* dirty segments assigned as hot node logs */
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DIRTY_WARM_NODE, /* dirty segments assigned as warm node logs */
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DIRTY_COLD_NODE, /* dirty segments assigned as cold node logs */
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DIRTY, /* to count # of dirty segments */
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PRE, /* to count # of entirely obsolete segments */
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NR_DIRTY_TYPE
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};
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struct dirty_seglist_info {
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const struct victim_selection *v_ops; /* victim selction operation */
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unsigned long *dirty_segmap[NR_DIRTY_TYPE];
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unsigned long *dirty_secmap;
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struct mutex seglist_lock; /* lock for segment bitmaps */
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int nr_dirty[NR_DIRTY_TYPE]; /* # of dirty segments */
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unsigned long *victim_secmap; /* background GC victims */
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};
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/* victim selection function for cleaning and SSR */
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struct victim_selection {
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int (*get_victim)(struct f2fs_sb_info *, unsigned int *,
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int, int, char, unsigned long long);
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};
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/* for active log information */
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struct curseg_info {
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struct mutex curseg_mutex; /* lock for consistency */
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struct f2fs_summary_block *sum_blk; /* cached summary block */
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struct rw_semaphore journal_rwsem; /* protect journal area */
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struct f2fs_journal *journal; /* cached journal info */
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unsigned char alloc_type; /* current allocation type */
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unsigned short seg_type; /* segment type like CURSEG_XXX_TYPE */
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unsigned int segno; /* current segment number */
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unsigned short next_blkoff; /* next block offset to write */
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unsigned int zone; /* current zone number */
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unsigned int next_segno; /* preallocated segment */
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int fragment_remained_chunk; /* remained block size in a chunk for block fragmentation mode */
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bool inited; /* indicate inmem log is inited */
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};
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struct sit_entry_set {
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struct list_head set_list; /* link with all sit sets */
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unsigned int start_segno; /* start segno of sits in set */
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unsigned int entry_cnt; /* the # of sit entries in set */
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};
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/*
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* inline functions
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*/
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static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type)
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{
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return (struct curseg_info *)(SM_I(sbi)->curseg_array + type);
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}
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static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi,
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unsigned int segno)
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{
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struct sit_info *sit_i = SIT_I(sbi);
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return &sit_i->sentries[segno];
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}
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static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi,
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unsigned int segno)
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{
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struct sit_info *sit_i = SIT_I(sbi);
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return &sit_i->sec_entries[GET_SEC_FROM_SEG(sbi, segno)];
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}
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static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi,
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unsigned int segno, bool use_section)
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{
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/*
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* In order to get # of valid blocks in a section instantly from many
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* segments, f2fs manages two counting structures separately.
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*/
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if (use_section && __is_large_section(sbi))
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return get_sec_entry(sbi, segno)->valid_blocks;
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else
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return get_seg_entry(sbi, segno)->valid_blocks;
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}
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static inline unsigned int get_ckpt_valid_blocks(struct f2fs_sb_info *sbi,
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|
unsigned int segno, bool use_section)
|
|
{
|
|
if (use_section && __is_large_section(sbi)) {
|
|
unsigned int start_segno = START_SEGNO(segno);
|
|
unsigned int blocks = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < sbi->segs_per_sec; i++, start_segno++) {
|
|
struct seg_entry *se = get_seg_entry(sbi, start_segno);
|
|
|
|
blocks += se->ckpt_valid_blocks;
|
|
}
|
|
return blocks;
|
|
}
|
|
return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
|
|
}
|
|
|
|
static inline void seg_info_from_raw_sit(struct seg_entry *se,
|
|
struct f2fs_sit_entry *rs)
|
|
{
|
|
se->valid_blocks = GET_SIT_VBLOCKS(rs);
|
|
se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs);
|
|
memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
|
|
memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
|
|
#ifdef CONFIG_F2FS_CHECK_FS
|
|
memcpy(se->cur_valid_map_mir, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
|
|
#endif
|
|
se->type = GET_SIT_TYPE(rs);
|
|
se->mtime = le64_to_cpu(rs->mtime);
|
|
}
|
|
|
|
static inline void __seg_info_to_raw_sit(struct seg_entry *se,
|
|
struct f2fs_sit_entry *rs)
|
|
{
|
|
unsigned short raw_vblocks = (se->type << SIT_VBLOCKS_SHIFT) |
|
|
se->valid_blocks;
|
|
rs->vblocks = cpu_to_le16(raw_vblocks);
|
|
memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE);
|
|
rs->mtime = cpu_to_le64(se->mtime);
|
|
}
|
|
|
|
static inline void seg_info_to_sit_page(struct f2fs_sb_info *sbi,
|
|
struct page *page, unsigned int start)
|
|
{
|
|
struct f2fs_sit_block *raw_sit;
|
|
struct seg_entry *se;
|
|
struct f2fs_sit_entry *rs;
|
|
unsigned int end = min(start + SIT_ENTRY_PER_BLOCK,
|
|
(unsigned long)MAIN_SEGS(sbi));
|
|
int i;
|
|
|
|
raw_sit = (struct f2fs_sit_block *)page_address(page);
|
|
memset(raw_sit, 0, PAGE_SIZE);
|
|
for (i = 0; i < end - start; i++) {
|
|
rs = &raw_sit->entries[i];
|
|
se = get_seg_entry(sbi, start + i);
|
|
__seg_info_to_raw_sit(se, rs);
|
|
}
|
|
}
|
|
|
|
static inline void seg_info_to_raw_sit(struct seg_entry *se,
|
|
struct f2fs_sit_entry *rs)
|
|
{
|
|
__seg_info_to_raw_sit(se, rs);
|
|
|
|
memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
|
|
se->ckpt_valid_blocks = se->valid_blocks;
|
|
}
|
|
|
|
static inline unsigned int find_next_inuse(struct free_segmap_info *free_i,
|
|
unsigned int max, unsigned int segno)
|
|
{
|
|
unsigned int ret;
|
|
spin_lock(&free_i->segmap_lock);
|
|
ret = find_next_bit(free_i->free_segmap, max, segno);
|
|
spin_unlock(&free_i->segmap_lock);
|
|
return ret;
|
|
}
|
|
|
|
static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno)
|
|
{
|
|
struct free_segmap_info *free_i = FREE_I(sbi);
|
|
unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
|
|
unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno);
|
|
unsigned int next;
|
|
unsigned int usable_segs = f2fs_usable_segs_in_sec(sbi, segno);
|
|
|
|
spin_lock(&free_i->segmap_lock);
|
|
clear_bit(segno, free_i->free_segmap);
|
|
free_i->free_segments++;
|
|
|
|
next = find_next_bit(free_i->free_segmap,
|
|
start_segno + sbi->segs_per_sec, start_segno);
|
|
if (next >= start_segno + usable_segs) {
|
|
clear_bit(secno, free_i->free_secmap);
|
|
free_i->free_sections++;
|
|
}
|
|
spin_unlock(&free_i->segmap_lock);
|
|
}
|
|
|
|
static inline void __set_inuse(struct f2fs_sb_info *sbi,
|
|
unsigned int segno)
|
|
{
|
|
struct free_segmap_info *free_i = FREE_I(sbi);
|
|
unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
|
|
|
|
set_bit(segno, free_i->free_segmap);
|
|
free_i->free_segments--;
|
|
if (!test_and_set_bit(secno, free_i->free_secmap))
|
|
free_i->free_sections--;
|
|
}
|
|
|
|
static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
|
|
unsigned int segno, bool inmem)
|
|
{
|
|
struct free_segmap_info *free_i = FREE_I(sbi);
|
|
unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
|
|
unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno);
|
|
unsigned int next;
|
|
unsigned int usable_segs = f2fs_usable_segs_in_sec(sbi, segno);
|
|
|
|
spin_lock(&free_i->segmap_lock);
|
|
if (test_and_clear_bit(segno, free_i->free_segmap)) {
|
|
free_i->free_segments++;
|
|
|
|
if (!inmem && IS_CURSEC(sbi, secno))
|
|
goto skip_free;
|
|
next = find_next_bit(free_i->free_segmap,
|
|
start_segno + sbi->segs_per_sec, start_segno);
|
|
if (next >= start_segno + usable_segs) {
|
|
if (test_and_clear_bit(secno, free_i->free_secmap))
|
|
free_i->free_sections++;
|
|
}
|
|
}
|
|
skip_free:
|
|
spin_unlock(&free_i->segmap_lock);
|
|
}
|
|
|
|
static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi,
|
|
unsigned int segno)
|
|
{
|
|
struct free_segmap_info *free_i = FREE_I(sbi);
|
|
unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
|
|
|
|
spin_lock(&free_i->segmap_lock);
|
|
if (!test_and_set_bit(segno, free_i->free_segmap)) {
|
|
free_i->free_segments--;
|
|
if (!test_and_set_bit(secno, free_i->free_secmap))
|
|
free_i->free_sections--;
|
|
}
|
|
spin_unlock(&free_i->segmap_lock);
|
|
}
|
|
|
|
static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
|
|
void *dst_addr)
|
|
{
|
|
struct sit_info *sit_i = SIT_I(sbi);
|
|
|
|
#ifdef CONFIG_F2FS_CHECK_FS
|
|
if (memcmp(sit_i->sit_bitmap, sit_i->sit_bitmap_mir,
|
|
sit_i->bitmap_size))
|
|
f2fs_bug_on(sbi, 1);
|
|
#endif
|
|
memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size);
|
|
}
|
|
|
|
static inline block_t written_block_count(struct f2fs_sb_info *sbi)
|
|
{
|
|
return SIT_I(sbi)->written_valid_blocks;
|
|
}
|
|
|
|
static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
|
|
{
|
|
return FREE_I(sbi)->free_segments;
|
|
}
|
|
|
|
static inline unsigned int reserved_segments(struct f2fs_sb_info *sbi)
|
|
{
|
|
return SM_I(sbi)->reserved_segments +
|
|
SM_I(sbi)->additional_reserved_segments;
|
|
}
|
|
|
|
static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
|
|
{
|
|
return FREE_I(sbi)->free_sections;
|
|
}
|
|
|
|
static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)
|
|
{
|
|
return DIRTY_I(sbi)->nr_dirty[PRE];
|
|
}
|
|
|
|
static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi)
|
|
{
|
|
return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] +
|
|
DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] +
|
|
DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] +
|
|
DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] +
|
|
DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] +
|
|
DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE];
|
|
}
|
|
|
|
static inline int overprovision_segments(struct f2fs_sb_info *sbi)
|
|
{
|
|
return SM_I(sbi)->ovp_segments;
|
|
}
|
|
|
|
static inline int reserved_sections(struct f2fs_sb_info *sbi)
|
|
{
|
|
return GET_SEC_FROM_SEG(sbi, reserved_segments(sbi));
|
|
}
|
|
|
|
static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi)
|
|
{
|
|
unsigned int node_blocks = get_pages(sbi, F2FS_DIRTY_NODES) +
|
|
get_pages(sbi, F2FS_DIRTY_DENTS);
|
|
unsigned int dent_blocks = get_pages(sbi, F2FS_DIRTY_DENTS);
|
|
unsigned int segno, left_blocks;
|
|
int i;
|
|
|
|
/* check current node segment */
|
|
for (i = CURSEG_HOT_NODE; i <= CURSEG_COLD_NODE; i++) {
|
|
segno = CURSEG_I(sbi, i)->segno;
|
|
left_blocks = f2fs_usable_blks_in_seg(sbi, segno) -
|
|
get_seg_entry(sbi, segno)->ckpt_valid_blocks;
|
|
|
|
if (node_blocks > left_blocks)
|
|
return false;
|
|
}
|
|
|
|
/* check current data segment */
|
|
segno = CURSEG_I(sbi, CURSEG_HOT_DATA)->segno;
|
|
left_blocks = f2fs_usable_blks_in_seg(sbi, segno) -
|
|
get_seg_entry(sbi, segno)->ckpt_valid_blocks;
|
|
if (dent_blocks > left_blocks)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi,
|
|
int freed, int needed)
|
|
{
|
|
int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
|
|
int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
|
|
int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
|
|
|
|
if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
|
|
return false;
|
|
|
|
if (free_sections(sbi) + freed == reserved_sections(sbi) + needed &&
|
|
has_curseg_enough_space(sbi))
|
|
return false;
|
|
return (free_sections(sbi) + freed) <=
|
|
(node_secs + 2 * dent_secs + imeta_secs +
|
|
reserved_sections(sbi) + needed);
|
|
}
|
|
|
|
static inline bool f2fs_is_checkpoint_ready(struct f2fs_sb_info *sbi)
|
|
{
|
|
if (likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
|
|
return true;
|
|
if (likely(!has_not_enough_free_secs(sbi, 0, 0)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi)
|
|
{
|
|
return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments;
|
|
}
|
|
|
|
static inline int utilization(struct f2fs_sb_info *sbi)
|
|
{
|
|
return div_u64((u64)valid_user_blocks(sbi) * 100,
|
|
sbi->user_block_count);
|
|
}
|
|
|
|
/*
|
|
* Sometimes f2fs may be better to drop out-of-place update policy.
|
|
* And, users can control the policy through sysfs entries.
|
|
* There are five policies with triggering conditions as follows.
|
|
* F2FS_IPU_FORCE - all the time,
|
|
* F2FS_IPU_SSR - if SSR mode is activated,
|
|
* F2FS_IPU_UTIL - if FS utilization is over threashold,
|
|
* F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over
|
|
* threashold,
|
|
* F2FS_IPU_FSYNC - activated in fsync path only for high performance flash
|
|
* storages. IPU will be triggered only if the # of dirty
|
|
* pages over min_fsync_blocks. (=default option)
|
|
* F2FS_IPU_ASYNC - do IPU given by asynchronous write requests.
|
|
* F2FS_IPU_NOCACHE - disable IPU bio cache.
|
|
* F2FS_IPUT_DISABLE - disable IPU. (=default option in LFS mode)
|
|
*/
|
|
#define DEF_MIN_IPU_UTIL 70
|
|
#define DEF_MIN_FSYNC_BLOCKS 8
|
|
#define DEF_MIN_HOT_BLOCKS 16
|
|
|
|
#define SMALL_VOLUME_SEGMENTS (16 * 512) /* 16GB */
|
|
|
|
enum {
|
|
F2FS_IPU_FORCE,
|
|
F2FS_IPU_SSR,
|
|
F2FS_IPU_UTIL,
|
|
F2FS_IPU_SSR_UTIL,
|
|
F2FS_IPU_FSYNC,
|
|
F2FS_IPU_ASYNC,
|
|
F2FS_IPU_NOCACHE,
|
|
};
|
|
|
|
static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi,
|
|
int type)
|
|
{
|
|
struct curseg_info *curseg = CURSEG_I(sbi, type);
|
|
return curseg->segno;
|
|
}
|
|
|
|
static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi,
|
|
int type)
|
|
{
|
|
struct curseg_info *curseg = CURSEG_I(sbi, type);
|
|
return curseg->alloc_type;
|
|
}
|
|
|
|
static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type)
|
|
{
|
|
struct curseg_info *curseg = CURSEG_I(sbi, type);
|
|
return curseg->next_blkoff;
|
|
}
|
|
|
|
static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
|
|
{
|
|
f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
|
|
}
|
|
|
|
static inline void verify_fio_blkaddr(struct f2fs_io_info *fio)
|
|
{
|
|
struct f2fs_sb_info *sbi = fio->sbi;
|
|
|
|
if (__is_valid_data_blkaddr(fio->old_blkaddr))
|
|
verify_blkaddr(sbi, fio->old_blkaddr, __is_meta_io(fio) ?
|
|
META_GENERIC : DATA_GENERIC);
|
|
verify_blkaddr(sbi, fio->new_blkaddr, __is_meta_io(fio) ?
|
|
META_GENERIC : DATA_GENERIC_ENHANCE);
|
|
}
|
|
|
|
/*
|
|
* Summary block is always treated as an invalid block
|
|
*/
|
|
static inline int check_block_count(struct f2fs_sb_info *sbi,
|
|
int segno, struct f2fs_sit_entry *raw_sit)
|
|
{
|
|
bool is_valid = test_bit_le(0, raw_sit->valid_map) ? true : false;
|
|
int valid_blocks = 0;
|
|
int cur_pos = 0, next_pos;
|
|
unsigned int usable_blks_per_seg = f2fs_usable_blks_in_seg(sbi, segno);
|
|
|
|
/* check bitmap with valid block count */
|
|
do {
|
|
if (is_valid) {
|
|
next_pos = find_next_zero_bit_le(&raw_sit->valid_map,
|
|
usable_blks_per_seg,
|
|
cur_pos);
|
|
valid_blocks += next_pos - cur_pos;
|
|
} else
|
|
next_pos = find_next_bit_le(&raw_sit->valid_map,
|
|
usable_blks_per_seg,
|
|
cur_pos);
|
|
cur_pos = next_pos;
|
|
is_valid = !is_valid;
|
|
} while (cur_pos < usable_blks_per_seg);
|
|
|
|
if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) {
|
|
f2fs_err(sbi, "Mismatch valid blocks %d vs. %d",
|
|
GET_SIT_VBLOCKS(raw_sit), valid_blocks);
|
|
set_sbi_flag(sbi, SBI_NEED_FSCK);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
|
|
if (usable_blks_per_seg < sbi->blocks_per_seg)
|
|
f2fs_bug_on(sbi, find_next_bit_le(&raw_sit->valid_map,
|
|
sbi->blocks_per_seg,
|
|
usable_blks_per_seg) != sbi->blocks_per_seg);
|
|
|
|
/* check segment usage, and check boundary of a given segment number */
|
|
if (unlikely(GET_SIT_VBLOCKS(raw_sit) > usable_blks_per_seg
|
|
|| segno > TOTAL_SEGS(sbi) - 1)) {
|
|
f2fs_err(sbi, "Wrong valid blocks %d or segno %u",
|
|
GET_SIT_VBLOCKS(raw_sit), segno);
|
|
set_sbi_flag(sbi, SBI_NEED_FSCK);
|
|
return -EFSCORRUPTED;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi,
|
|
unsigned int start)
|
|
{
|
|
struct sit_info *sit_i = SIT_I(sbi);
|
|
unsigned int offset = SIT_BLOCK_OFFSET(start);
|
|
block_t blk_addr = sit_i->sit_base_addr + offset;
|
|
|
|
check_seg_range(sbi, start);
|
|
|
|
#ifdef CONFIG_F2FS_CHECK_FS
|
|
if (f2fs_test_bit(offset, sit_i->sit_bitmap) !=
|
|
f2fs_test_bit(offset, sit_i->sit_bitmap_mir))
|
|
f2fs_bug_on(sbi, 1);
|
|
#endif
|
|
|
|
/* calculate sit block address */
|
|
if (f2fs_test_bit(offset, sit_i->sit_bitmap))
|
|
blk_addr += sit_i->sit_blocks;
|
|
|
|
return blk_addr;
|
|
}
|
|
|
|
static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi,
|
|
pgoff_t block_addr)
|
|
{
|
|
struct sit_info *sit_i = SIT_I(sbi);
|
|
block_addr -= sit_i->sit_base_addr;
|
|
if (block_addr < sit_i->sit_blocks)
|
|
block_addr += sit_i->sit_blocks;
|
|
else
|
|
block_addr -= sit_i->sit_blocks;
|
|
|
|
return block_addr + sit_i->sit_base_addr;
|
|
}
|
|
|
|
static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start)
|
|
{
|
|
unsigned int block_off = SIT_BLOCK_OFFSET(start);
|
|
|
|
f2fs_change_bit(block_off, sit_i->sit_bitmap);
|
|
#ifdef CONFIG_F2FS_CHECK_FS
|
|
f2fs_change_bit(block_off, sit_i->sit_bitmap_mir);
|
|
#endif
|
|
}
|
|
|
|
static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi,
|
|
bool base_time)
|
|
{
|
|
struct sit_info *sit_i = SIT_I(sbi);
|
|
time64_t diff, now = ktime_get_boottime_seconds();
|
|
|
|
if (now >= sit_i->mounted_time)
|
|
return sit_i->elapsed_time + now - sit_i->mounted_time;
|
|
|
|
/* system time is set to the past */
|
|
if (!base_time) {
|
|
diff = sit_i->mounted_time - now;
|
|
if (sit_i->elapsed_time >= diff)
|
|
return sit_i->elapsed_time - diff;
|
|
return 0;
|
|
}
|
|
return sit_i->elapsed_time;
|
|
}
|
|
|
|
static inline void set_summary(struct f2fs_summary *sum, nid_t nid,
|
|
unsigned int ofs_in_node, unsigned char version)
|
|
{
|
|
sum->nid = cpu_to_le32(nid);
|
|
sum->ofs_in_node = cpu_to_le16(ofs_in_node);
|
|
sum->version = version;
|
|
}
|
|
|
|
static inline block_t start_sum_block(struct f2fs_sb_info *sbi)
|
|
{
|
|
return __start_cp_addr(sbi) +
|
|
le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
|
|
}
|
|
|
|
static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type)
|
|
{
|
|
return __start_cp_addr(sbi) +
|
|
le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count)
|
|
- (base + 1) + type;
|
|
}
|
|
|
|
static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno)
|
|
{
|
|
if (IS_CURSEC(sbi, secno) || (sbi->cur_victim_sec == secno))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* It is very important to gather dirty pages and write at once, so that we can
|
|
* submit a big bio without interfering other data writes.
|
|
* By default, 512 pages for directory data,
|
|
* 512 pages (2MB) * 8 for nodes, and
|
|
* 256 pages * 8 for meta are set.
|
|
*/
|
|
static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type)
|
|
{
|
|
if (sbi->sb->s_bdi->wb.dirty_exceeded)
|
|
return 0;
|
|
|
|
if (type == DATA)
|
|
return sbi->blocks_per_seg;
|
|
else if (type == NODE)
|
|
return 8 * sbi->blocks_per_seg;
|
|
else if (type == META)
|
|
return 8 * BIO_MAX_VECS;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* When writing pages, it'd better align nr_to_write for segment size.
|
|
*/
|
|
static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type,
|
|
struct writeback_control *wbc)
|
|
{
|
|
long nr_to_write, desired;
|
|
|
|
if (wbc->sync_mode != WB_SYNC_NONE)
|
|
return 0;
|
|
|
|
nr_to_write = wbc->nr_to_write;
|
|
desired = BIO_MAX_VECS;
|
|
if (type == NODE)
|
|
desired <<= 1;
|
|
|
|
wbc->nr_to_write = desired;
|
|
return desired - nr_to_write;
|
|
}
|
|
|
|
static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force)
|
|
{
|
|
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
|
|
bool wakeup = false;
|
|
int i;
|
|
|
|
if (force)
|
|
goto wake_up;
|
|
|
|
mutex_lock(&dcc->cmd_lock);
|
|
for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
|
|
if (i + 1 < dcc->discard_granularity)
|
|
break;
|
|
if (!list_empty(&dcc->pend_list[i])) {
|
|
wakeup = true;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&dcc->cmd_lock);
|
|
if (!wakeup || !is_idle(sbi, DISCARD_TIME))
|
|
return;
|
|
wake_up:
|
|
dcc->discard_wake = 1;
|
|
wake_up_interruptible_all(&dcc->discard_wait_queue);
|
|
}
|