^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) * recovery.c - NILFS recovery logic
^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) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/swap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/crc32.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 "segment.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "sufile.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "page.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "segbuf.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Segment check result
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) NILFS_SEG_VALID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) NILFS_SEG_NO_SUPER_ROOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) NILFS_SEG_FAIL_IO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) NILFS_SEG_FAIL_MAGIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) NILFS_SEG_FAIL_SEQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) NILFS_SEG_FAIL_CHECKSUM_FULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) NILFS_SEG_FAIL_CONSISTENCY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* work structure for recovery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct nilfs_recovery_block {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ino_t ino; /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Inode number of the file that this block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * belongs to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) sector_t blocknr; /* block number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) __u64 vblocknr; /* virtual block number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned long blkoff; /* File offset of the data block (per block) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int nilfs_warn_segment_error(struct super_block *sb, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) const char *msg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) switch (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) case NILFS_SEG_FAIL_IO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) nilfs_err(sb, "I/O error reading segment");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) case NILFS_SEG_FAIL_MAGIC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) msg = "Magic number mismatch";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) case NILFS_SEG_FAIL_SEQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) msg = "Sequence number mismatch";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) case NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) msg = "Checksum error in super root";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) case NILFS_SEG_FAIL_CHECKSUM_FULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) msg = "Checksum error in segment payload";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) case NILFS_SEG_FAIL_CONSISTENCY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) msg = "Inconsistency found";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) case NILFS_SEG_NO_SUPER_ROOT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) msg = "No super root in the last segment";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) nilfs_err(sb, "unrecognized segment error %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) nilfs_warn(sb, "invalid segment: %s", msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * nilfs_compute_checksum - compute checksum of blocks continuously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * @bhs: buffer head of start block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * @sum: place to store result
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * @offset: offset bytes in the first block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * @check_bytes: number of bytes to be checked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * @start: DBN of start block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * @nblock: number of blocks to be checked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static int nilfs_compute_checksum(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct buffer_head *bhs, u32 *sum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long offset, u64 check_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) sector_t start, unsigned long nblock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) unsigned int blocksize = nilfs->ns_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) unsigned long size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) u32 crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) BUG_ON(offset >= blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) check_bytes -= offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) size = min_t(u64, check_bytes, blocksize - offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) crc = crc32_le(nilfs->ns_crc_seed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) (unsigned char *)bhs->b_data + offset, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (--nblock > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) bh = __bread(nilfs->ns_bdev, ++start, blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) check_bytes -= size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) size = min_t(u64, check_bytes, blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) crc = crc32_le(crc, bh->b_data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) } while (--nblock > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) *sum = crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * nilfs_read_super_root_block - read super root block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * @sr_block: disk block number of the super root block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * @pbh: address of a buffer_head pointer to return super root buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * @check: CRC check flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) int nilfs_read_super_root_block(struct the_nilfs *nilfs, sector_t sr_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct buffer_head **pbh, int check)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct buffer_head *bh_sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct nilfs_super_root *sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) u32 crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) *pbh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) bh_sr = __bread(nilfs->ns_bdev, sr_block, nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (unlikely(!bh_sr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ret = NILFS_SEG_FAIL_IO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) sr = (struct nilfs_super_root *)bh_sr->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (check) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) unsigned int bytes = le16_to_cpu(sr->sr_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (bytes == 0 || bytes > nilfs->ns_blocksize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret = NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) goto failed_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (nilfs_compute_checksum(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) nilfs, bh_sr, &crc, sizeof(sr->sr_sum), bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) sr_block, 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) ret = NILFS_SEG_FAIL_IO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) goto failed_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (crc != le32_to_cpu(sr->sr_sum)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ret = NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) goto failed_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) *pbh = bh_sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) failed_bh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) brelse(bh_sr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return nilfs_warn_segment_error(nilfs->ns_sb, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * nilfs_read_log_header - read summary header of the specified log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * @start_blocknr: start block number of the log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * @sum: pointer to return segment summary structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) nilfs_read_log_header(struct the_nilfs *nilfs, sector_t start_blocknr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct nilfs_segment_summary **sum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct buffer_head *bh_sum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) bh_sum = __bread(nilfs->ns_bdev, start_blocknr, nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (bh_sum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) *sum = (struct nilfs_segment_summary *)bh_sum->b_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return bh_sum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * nilfs_validate_log - verify consistency of log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * @seg_seq: sequence number of segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * @bh_sum: buffer head of summary block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * @sum: segment summary struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static int nilfs_validate_log(struct the_nilfs *nilfs, u64 seg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct buffer_head *bh_sum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct nilfs_segment_summary *sum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) unsigned long nblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) u32 crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) ret = NILFS_SEG_FAIL_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (le32_to_cpu(sum->ss_magic) != NILFS_SEGSUM_MAGIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) ret = NILFS_SEG_FAIL_SEQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (le64_to_cpu(sum->ss_seq) != seg_seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) nblock = le32_to_cpu(sum->ss_nblocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) ret = NILFS_SEG_FAIL_CONSISTENCY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (unlikely(nblock == 0 || nblock > nilfs->ns_blocks_per_segment))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* This limits the number of blocks read in the CRC check */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ret = NILFS_SEG_FAIL_IO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (nilfs_compute_checksum(nilfs, bh_sum, &crc, sizeof(sum->ss_datasum),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) ((u64)nblock << nilfs->ns_blocksize_bits),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) bh_sum->b_blocknr, nblock))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) ret = NILFS_SEG_FAIL_CHECKSUM_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (crc != le32_to_cpu(sum->ss_datasum))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * nilfs_read_summary_info - read an item on summary blocks of a log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * @pbh: the current buffer head on summary blocks [in, out]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * @offset: the current byte offset on summary blocks [in, out]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * @bytes: byte size of the item to be read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static void *nilfs_read_summary_info(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct buffer_head **pbh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) unsigned int *offset, unsigned int bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) void *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) sector_t blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) BUG_ON((*pbh)->b_size < *offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (bytes > (*pbh)->b_size - *offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) blocknr = (*pbh)->b_blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) brelse(*pbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) *pbh = __bread(nilfs->ns_bdev, blocknr + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (unlikely(!*pbh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) *offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) ptr = (*pbh)->b_data + *offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) *offset += bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * nilfs_skip_summary_info - skip items on summary blocks of a log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * @pbh: the current buffer head on summary blocks [in, out]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * @offset: the current byte offset on summary blocks [in, out]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * @bytes: byte size of the item to be skipped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * @count: number of items to be skipped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static void nilfs_skip_summary_info(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct buffer_head **pbh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned int *offset, unsigned int bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) unsigned long count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) unsigned int rest_item_in_current_block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) = ((*pbh)->b_size - *offset) / bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (count <= rest_item_in_current_block) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) *offset += bytes * count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) sector_t blocknr = (*pbh)->b_blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) unsigned int nitem_per_block = (*pbh)->b_size / bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) unsigned int bcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) count -= rest_item_in_current_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) bcnt = DIV_ROUND_UP(count, nitem_per_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) *offset = bytes * (count - (bcnt - 1) * nitem_per_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) brelse(*pbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) *pbh = __bread(nilfs->ns_bdev, blocknr + bcnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * nilfs_scan_dsync_log - get block information of a log written for data sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * @start_blocknr: start block number of the log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * @sum: log summary information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * @head: list head to add nilfs_recovery_block struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static int nilfs_scan_dsync_log(struct the_nilfs *nilfs, sector_t start_blocknr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct nilfs_segment_summary *sum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) unsigned int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) u32 nfinfo, sumbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) sector_t blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) ino_t ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) int err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) nfinfo = le32_to_cpu(sum->ss_nfinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (!nfinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) sumbytes = le32_to_cpu(sum->ss_sumbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) blocknr = start_blocknr + DIV_ROUND_UP(sumbytes, nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) bh = __bread(nilfs->ns_bdev, start_blocknr, nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (unlikely(!bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) offset = le16_to_cpu(sum->ss_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) unsigned long nblocks, ndatablk, nnodeblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) struct nilfs_finfo *finfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) finfo = nilfs_read_summary_info(nilfs, &bh, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) sizeof(*finfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (unlikely(!finfo))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) ino = le64_to_cpu(finfo->fi_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) nblocks = le32_to_cpu(finfo->fi_nblocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) ndatablk = le32_to_cpu(finfo->fi_ndatablk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) nnodeblk = nblocks - ndatablk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) while (ndatablk-- > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) struct nilfs_recovery_block *rb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct nilfs_binfo_v *binfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) binfo = nilfs_read_summary_info(nilfs, &bh, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) sizeof(*binfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (unlikely(!binfo))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) rb = kmalloc(sizeof(*rb), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (unlikely(!rb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) rb->ino = ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) rb->blocknr = blocknr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) rb->vblocknr = le64_to_cpu(binfo->bi_vblocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) rb->blkoff = le64_to_cpu(binfo->bi_blkoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* INIT_LIST_HEAD(&rb->list); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) list_add_tail(&rb->list, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (--nfinfo == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) blocknr += nnodeblk; /* always 0 for data sync logs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) nilfs_skip_summary_info(nilfs, &bh, &offset, sizeof(__le64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) nnodeblk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (unlikely(!bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) brelse(bh); /* brelse(NULL) is just ignored */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) static void dispose_recovery_list(struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) while (!list_empty(head)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct nilfs_recovery_block *rb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) rb = list_first_entry(head, struct nilfs_recovery_block, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) list_del(&rb->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) kfree(rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) struct nilfs_segment_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) __u64 segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static int nilfs_segment_list_add(struct list_head *head, __u64 segnum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) struct nilfs_segment_entry *ent = kmalloc(sizeof(*ent), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (unlikely(!ent))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) ent->segnum = segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) INIT_LIST_HEAD(&ent->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) list_add_tail(&ent->list, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) void nilfs_dispose_segment_list(struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) while (!list_empty(head)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) struct nilfs_segment_entry *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) ent = list_first_entry(head, struct nilfs_segment_entry, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) list_del(&ent->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) kfree(ent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct nilfs_recovery_info *ri)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) struct list_head *head = &ri->ri_used_segments;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) struct nilfs_segment_entry *ent, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) struct inode *sufile = nilfs->ns_sufile;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) __u64 segnum[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) segnum[0] = nilfs->ns_segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) segnum[1] = nilfs->ns_nextnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) segnum[2] = ri->ri_segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) segnum[3] = ri->ri_nextnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * Releasing the next segment of the latest super root.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * The next segment is invalidated by this recovery.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) err = nilfs_sufile_free(sufile, segnum[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) for (i = 1; i < 4; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) err = nilfs_segment_list_add(head, segnum[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) * Collecting segments written after the latest super root.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * These are marked dirty to avoid being reallocated in the next write.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) list_for_each_entry_safe(ent, n, head, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (ent->segnum != segnum[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) err = nilfs_sufile_scrap(sufile, ent->segnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) list_del(&ent->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) kfree(ent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /* Allocate new segments for recovery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) err = nilfs_sufile_alloc(sufile, &segnum[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) nilfs->ns_pseg_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) nilfs->ns_seg_seq = ri->ri_seq + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) nilfs->ns_nextnum = nilfs->ns_segnum = segnum[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) /* No need to recover sufile because it will be destroyed on error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) static int nilfs_recovery_copy_block(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) struct nilfs_recovery_block *rb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct buffer_head *bh_org;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) void *kaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) bh_org = __bread(nilfs->ns_bdev, rb->blocknr, nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (unlikely(!bh_org))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) kaddr = kmap_atomic(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) memcpy(kaddr + bh_offset(bh_org), bh_org->b_data, bh_org->b_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) kunmap_atomic(kaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) brelse(bh_org);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) struct nilfs_root *root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) struct list_head *head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) unsigned long *nr_salvaged_blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) struct nilfs_recovery_block *rb, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) unsigned int blocksize = nilfs->ns_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) loff_t pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) int err = 0, err2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) list_for_each_entry_safe(rb, n, head, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) inode = nilfs_iget(sb, root, rb->ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) if (IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) inode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) goto failed_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) pos = rb->blkoff << inode->i_blkbits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) err = block_write_begin(inode->i_mapping, pos, blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 0, &page, nilfs_get_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) loff_t isize = inode->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (pos + blocksize > isize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) nilfs_write_failed(inode->i_mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) pos + blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) goto failed_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) err = nilfs_recovery_copy_block(nilfs, rb, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) goto failed_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) err = nilfs_set_file_dirty(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) goto failed_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) block_write_end(NULL, inode->i_mapping, pos, blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) blocksize, page, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) (*nr_salvaged_blocks)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) failed_page:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) failed_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) nilfs_warn(sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) "error %d recovering data block (ino=%lu, block-offset=%llu)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) err, (unsigned long)rb->ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) (unsigned long long)rb->blkoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if (!err2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) err2 = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) iput(inode); /* iput(NULL) is just ignored */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) list_del_init(&rb->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) kfree(rb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) return err2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * nilfs_do_roll_forward - salvage logical segments newer than the latest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * checkpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * @sb: super block instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * @ri: pointer to a nilfs_recovery_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct nilfs_root *root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) struct nilfs_recovery_info *ri)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct buffer_head *bh_sum = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct nilfs_segment_summary *sum = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) sector_t pseg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) sector_t seg_start, seg_end; /* Starting/ending DBN of full segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) unsigned long nsalvaged_blocks = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) u64 seg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) __u64 segnum, nextnum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) int empty_seg = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) int err = 0, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) LIST_HEAD(dsync_blocks); /* list of data blocks to be recovered */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) RF_INIT_ST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) RF_DSYNC_ST, /* scanning data-sync segments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) int state = RF_INIT_ST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) pseg_start = ri->ri_lsegs_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) seg_seq = ri->ri_lsegs_start_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) segnum = nilfs_get_segnum_of_block(nilfs, pseg_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) while (segnum != ri->ri_segnum || pseg_start <= ri->ri_pseg_start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) brelse(bh_sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) bh_sum = nilfs_read_log_header(nilfs, pseg_start, &sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (!bh_sum) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) ret = nilfs_validate_log(nilfs, seg_seq, bh_sum, sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (ret == NILFS_SEG_FAIL_IO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) goto strayed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) flags = le16_to_cpu(sum->ss_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (flags & NILFS_SS_SR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) goto confused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /* Found a valid partial segment; do recovery actions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) nextnum = nilfs_get_segnum_of_block(nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) le64_to_cpu(sum->ss_next));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) empty_seg = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) nilfs->ns_ctime = le64_to_cpu(sum->ss_create);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) if (!(flags & NILFS_SS_GC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) nilfs->ns_nongc_ctime = nilfs->ns_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) switch (state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) case RF_INIT_ST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (!(flags & NILFS_SS_LOGBGN) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) !(flags & NILFS_SS_SYNDT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) goto try_next_pseg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) state = RF_DSYNC_ST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) case RF_DSYNC_ST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (!(flags & NILFS_SS_SYNDT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) goto confused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) err = nilfs_scan_dsync_log(nilfs, pseg_start, sum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) &dsync_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (flags & NILFS_SS_LOGEND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) err = nilfs_recover_dsync_blocks(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) nilfs, sb, root, &dsync_blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) &nsalvaged_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) state = RF_INIT_ST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) break; /* Fall through to try_next_pseg */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) try_next_pseg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (pseg_start == ri->ri_lsegs_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) pseg_start += le32_to_cpu(sum->ss_nblocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) if (pseg_start < seg_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) goto feed_segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) strayed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (pseg_start == ri->ri_lsegs_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) feed_segment:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) /* Looking to the next full segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) if (empty_seg++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) seg_seq++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) segnum = nextnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) pseg_start = seg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (nsalvaged_blocks) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) nilfs_info(sb, "salvaged %lu blocks", nsalvaged_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) ri->ri_need_recovery = NILFS_RECOVERY_ROLLFORWARD_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) brelse(bh_sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) dispose_recovery_list(&dsync_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) confused:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) nilfs_err(sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) "error %d roll-forwarding partial segment at blocknr = %llu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) err, (unsigned long long)pseg_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) static void nilfs_finish_roll_forward(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) struct nilfs_recovery_info *ri)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (nilfs_get_segnum_of_block(nilfs, ri->ri_lsegs_start) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) nilfs_get_segnum_of_block(nilfs, ri->ri_super_root))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) bh = __getblk(nilfs->ns_bdev, ri->ri_lsegs_start, nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) BUG_ON(!bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) memset(bh->b_data, 0, bh->b_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) set_buffer_dirty(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) err = sync_dirty_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) nilfs_warn(nilfs->ns_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) "buffer sync write failed during post-cleaning of recovery.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) * nilfs_salvage_orphan_logs - salvage logs written after the latest checkpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) * @nilfs: nilfs object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) * @sb: super block instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * @ri: pointer to a nilfs_recovery_info struct to store search results.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) * Return Value: On success, 0 is returned. On error, one of the following
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) * negative error code is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) * %-EINVAL - Inconsistent filesystem state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * %-EIO - I/O error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * %-ENOSPC - No space left on device (only in a panic state).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) * %-ERESTARTSYS - Interrupted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * %-ENOMEM - Insufficient memory available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) struct nilfs_recovery_info *ri)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) struct nilfs_root *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) if (ri->ri_lsegs_start == 0 || ri->ri_lsegs_end == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) err = nilfs_attach_checkpoint(sb, ri->ri_cno, true, &root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) nilfs_err(sb, "error %d loading the latest checkpoint", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) err = nilfs_do_roll_forward(nilfs, sb, root, ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if (ri->ri_need_recovery == NILFS_RECOVERY_ROLLFORWARD_DONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) err = nilfs_prepare_segment_for_recovery(nilfs, sb, ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) nilfs_err(sb, "error %d preparing segment for recovery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) err = nilfs_attach_log_writer(sb, root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (unlikely(err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) set_nilfs_discontinued(nilfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) err = nilfs_construct_segment(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) nilfs_detach_log_writer(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) nilfs_err(sb, "error %d writing segment for recovery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) nilfs_finish_roll_forward(nilfs, ri);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) nilfs_put_root(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) * nilfs_search_super_root - search the latest valid super root
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) * @nilfs: the_nilfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) * @ri: pointer to a nilfs_recovery_info struct to store search results.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) * nilfs_search_super_root() looks for the latest super-root from a partial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) * segment pointed by the superblock. It sets up struct the_nilfs through
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) * this search. It fills nilfs_recovery_info (ri) required for recovery.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) * Return Value: On success, 0 is returned. On error, one of the following
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) * negative error code is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) * %-EINVAL - No valid segment found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) * %-EIO - I/O error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * %-ENOMEM - Insufficient memory available.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) int nilfs_search_super_root(struct the_nilfs *nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) struct nilfs_recovery_info *ri)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) struct buffer_head *bh_sum = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) struct nilfs_segment_summary *sum = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) sector_t pseg_start, pseg_end, sr_pseg_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) sector_t seg_start, seg_end; /* range of full segment (block number) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) sector_t b, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) unsigned long nblocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) u64 seg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) __u64 segnum, nextnum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) __u64 cno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) LIST_HEAD(segments);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) int empty_seg = 0, scan_newer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) pseg_start = nilfs->ns_last_pseg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) seg_seq = nilfs->ns_last_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) cno = nilfs->ns_last_cno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) segnum = nilfs_get_segnum_of_block(nilfs, pseg_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) /* Calculate range of segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) /* Read ahead segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) b = seg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) while (b <= seg_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) __breadahead(nilfs->ns_bdev, b++, nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) brelse(bh_sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) ret = NILFS_SEG_FAIL_IO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) bh_sum = nilfs_read_log_header(nilfs, pseg_start, &sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (!bh_sum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) ret = nilfs_validate_log(nilfs, seg_seq, bh_sum, sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) if (ret == NILFS_SEG_FAIL_IO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) goto strayed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) nblocks = le32_to_cpu(sum->ss_nblocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) pseg_end = pseg_start + nblocks - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) if (unlikely(pseg_end > seg_end)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) ret = NILFS_SEG_FAIL_CONSISTENCY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) goto strayed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) /* A valid partial segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) ri->ri_pseg_start = pseg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) ri->ri_seq = seg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) ri->ri_segnum = segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) nextnum = nilfs_get_segnum_of_block(nilfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) le64_to_cpu(sum->ss_next));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) ri->ri_nextnum = nextnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) empty_seg = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) flags = le16_to_cpu(sum->ss_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) if (!(flags & NILFS_SS_SR) && !scan_newer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) * This will never happen because a superblock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) * (last_segment) always points to a pseg with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * a super root.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) ret = NILFS_SEG_FAIL_CONSISTENCY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) if (pseg_start == seg_start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) nilfs_get_segment_range(nilfs, nextnum, &b, &end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) while (b <= end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) __breadahead(nilfs->ns_bdev, b++,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) nilfs->ns_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) if (!(flags & NILFS_SS_SR)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) if (!ri->ri_lsegs_start && (flags & NILFS_SS_LOGBGN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) ri->ri_lsegs_start = pseg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) ri->ri_lsegs_start_seq = seg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) if (flags & NILFS_SS_LOGEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) ri->ri_lsegs_end = pseg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) goto try_next_pseg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) /* A valid super root was found. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) ri->ri_cno = cno++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) ri->ri_super_root = pseg_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) ri->ri_lsegs_start = ri->ri_lsegs_end = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) nilfs_dispose_segment_list(&segments);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) sr_pseg_start = pseg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) nilfs->ns_pseg_offset = pseg_start + nblocks - seg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) nilfs->ns_seg_seq = seg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) nilfs->ns_segnum = segnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) nilfs->ns_cno = cno; /* nilfs->ns_cno = ri->ri_cno + 1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) nilfs->ns_ctime = le64_to_cpu(sum->ss_create);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) nilfs->ns_nextnum = nextnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) if (scan_newer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) ri->ri_need_recovery = NILFS_RECOVERY_SR_UPDATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) if (nilfs->ns_mount_state & NILFS_VALID_FS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) goto super_root_found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) scan_newer = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) try_next_pseg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) /* Standing on a course, or met an inconsistent state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) pseg_start += nblocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) if (pseg_start < seg_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) goto feed_segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) strayed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) /* Off the trail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) if (!scan_newer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) * This can happen if a checkpoint was written without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) * barriers, or as a result of an I/O failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) feed_segment:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) /* Looking to the next full segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (empty_seg++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) goto super_root_found; /* found a valid super root */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) ret = nilfs_segment_list_add(&segments, segnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) if (unlikely(ret))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) seg_seq++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) segnum = nextnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) pseg_start = seg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) super_root_found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) /* Updating pointers relating to the latest checkpoint */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) brelse(bh_sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) list_splice_tail(&segments, &ri->ri_used_segments);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) nilfs->ns_last_pseg = sr_pseg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) nilfs->ns_last_seq = nilfs->ns_seg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) nilfs->ns_last_cno = ri->ri_cno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) brelse(bh_sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) nilfs_dispose_segment_list(&segments);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) return ret < 0 ? ret : nilfs_warn_segment_error(nilfs->ns_sb, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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