mirror of https://gitee.com/openkylin/linux.git
nilfs2: do not use nilfs_segsum_info structure in recovery code
This will get rid of nilfs_segsum_info use from recovery functions for simplicity. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi
parent
354fa8be28
commit
85655484f8
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@ -91,24 +91,6 @@ static int nilfs_warn_segment_error(int err)
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return -EINVAL;
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}
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static void store_segsum_info(struct nilfs_segsum_info *ssi,
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struct nilfs_segment_summary *sum,
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unsigned int blocksize)
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{
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ssi->flags = le16_to_cpu(sum->ss_flags);
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ssi->seg_seq = le64_to_cpu(sum->ss_seq);
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ssi->ctime = le64_to_cpu(sum->ss_create);
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ssi->next = le64_to_cpu(sum->ss_next);
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ssi->nblocks = le32_to_cpu(sum->ss_nblocks);
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ssi->nfinfo = le32_to_cpu(sum->ss_nfinfo);
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ssi->sumbytes = le32_to_cpu(sum->ss_sumbytes);
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ssi->nsumblk = DIV_ROUND_UP(ssi->sumbytes, blocksize);
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ssi->nfileblk = ssi->nblocks - ssi->nsumblk - !!NILFS_SEG_HAS_SR(ssi);
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/* need to verify ->ss_bytes field if read ->ss_cno */
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}
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/**
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* nilfs_compute_checksum - compute checksum of blocks continuously
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* @nilfs: nilfs object
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@ -328,29 +310,31 @@ static void nilfs_skip_summary_info(struct the_nilfs *nilfs,
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* nilfs_scan_dsync_log - get block information of a log written for data sync
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* @nilfs: nilfs object
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* @start_blocknr: start block number of the log
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* @ssi: log summary information
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* @sum: log summary information
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* @head: list head to add nilfs_recovery_block struct
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*/
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static int nilfs_scan_dsync_log(struct the_nilfs *nilfs, sector_t start_blocknr,
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struct nilfs_segsum_info *ssi,
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struct nilfs_segment_summary *sum,
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struct list_head *head)
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{
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struct buffer_head *bh;
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unsigned int offset;
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unsigned long nfinfo = ssi->nfinfo;
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sector_t blocknr = start_blocknr + ssi->nsumblk;
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u32 nfinfo, sumbytes;
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sector_t blocknr;
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ino_t ino;
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int err = -EIO;
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nfinfo = le32_to_cpu(sum->ss_nfinfo);
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if (!nfinfo)
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return 0;
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sumbytes = le32_to_cpu(sum->ss_sumbytes);
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blocknr = start_blocknr + DIV_ROUND_UP(sumbytes, nilfs->ns_blocksize);
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bh = __bread(nilfs->ns_bdev, start_blocknr, nilfs->ns_blocksize);
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if (unlikely(!bh))
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goto out;
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offset = le16_to_cpu(
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((struct nilfs_segment_summary *)bh->b_data)->ss_bytes);
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offset = le16_to_cpu(sum->ss_bytes);
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for (;;) {
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unsigned long nblocks, ndatablk, nnodeblk;
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struct nilfs_finfo *finfo;
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@ -593,12 +577,12 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
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struct nilfs_sb_info *sbi,
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struct nilfs_recovery_info *ri)
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{
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struct nilfs_segsum_info ssi;
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struct buffer_head *bh_sum = NULL;
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struct nilfs_segment_summary *sum;
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sector_t pseg_start;
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sector_t seg_start, seg_end; /* Starting/ending DBN of full segment */
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unsigned long nsalvaged_blocks = 0;
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unsigned int flags;
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u64 seg_seq;
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__u64 segnum, nextnum = 0;
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int empty_seg = 0;
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@ -633,32 +617,34 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
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goto strayed;
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}
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store_segsum_info(&ssi, sum, nilfs->ns_blocksize);
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if (unlikely(NILFS_SEG_HAS_SR(&ssi)))
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flags = le16_to_cpu(sum->ss_flags);
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if (flags & NILFS_SS_SR)
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goto confused;
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/* Found a valid partial segment; do recovery actions */
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nextnum = nilfs_get_segnum_of_block(nilfs, ssi.next);
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nextnum = nilfs_get_segnum_of_block(nilfs,
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le64_to_cpu(sum->ss_next));
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empty_seg = 0;
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nilfs->ns_ctime = ssi.ctime;
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if (!(ssi.flags & NILFS_SS_GC))
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nilfs->ns_nongc_ctime = ssi.ctime;
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nilfs->ns_ctime = le64_to_cpu(sum->ss_create);
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if (!(flags & NILFS_SS_GC))
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nilfs->ns_nongc_ctime = nilfs->ns_ctime;
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switch (state) {
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case RF_INIT_ST:
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if (!NILFS_SEG_LOGBGN(&ssi) || !NILFS_SEG_DSYNC(&ssi))
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if (!(flags & NILFS_SS_LOGBGN) ||
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!(flags & NILFS_SS_SYNDT))
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goto try_next_pseg;
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state = RF_DSYNC_ST;
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/* Fall through */
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case RF_DSYNC_ST:
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if (!NILFS_SEG_DSYNC(&ssi))
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if (!(flags & NILFS_SS_SYNDT))
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goto confused;
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err = nilfs_scan_dsync_log(nilfs, pseg_start, &ssi,
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err = nilfs_scan_dsync_log(nilfs, pseg_start, sum,
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&dsync_blocks);
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if (unlikely(err))
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goto failed;
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if (NILFS_SEG_LOGEND(&ssi)) {
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if (flags & NILFS_SS_LOGEND) {
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err = nilfs_recover_dsync_blocks(
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nilfs, sbi, &dsync_blocks,
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&nsalvaged_blocks);
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@ -672,7 +658,7 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
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try_next_pseg:
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if (pseg_start == ri->ri_lsegs_end)
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break;
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pseg_start += ssi.nblocks;
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pseg_start += le32_to_cpu(sum->ss_nblocks);
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if (pseg_start < seg_end)
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continue;
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goto feed_segment;
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@ -822,12 +808,13 @@ int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,
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int nilfs_search_super_root(struct the_nilfs *nilfs,
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struct nilfs_recovery_info *ri)
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{
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struct nilfs_segsum_info ssi;
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struct buffer_head *bh_sum = NULL;
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struct nilfs_segment_summary *sum;
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sector_t pseg_start, pseg_end, sr_pseg_start = 0;
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sector_t seg_start, seg_end; /* range of full segment (block number) */
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sector_t b, end;
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unsigned long nblocks;
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unsigned int flags;
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u64 seg_seq;
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__u64 segnum, nextnum = 0;
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__u64 cno;
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@ -862,8 +849,8 @@ int nilfs_search_super_root(struct the_nilfs *nilfs,
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goto strayed;
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}
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store_segsum_info(&ssi, sum, nilfs->ns_blocksize);
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pseg_end = pseg_start + ssi.nblocks - 1;
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nblocks = le32_to_cpu(sum->ss_nblocks);
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pseg_end = pseg_start + nblocks - 1;
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if (unlikely(pseg_end > seg_end)) {
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ret = NILFS_SEG_FAIL_CONSISTENCY;
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goto strayed;
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@ -873,11 +860,13 @@ int nilfs_search_super_root(struct the_nilfs *nilfs,
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ri->ri_pseg_start = pseg_start;
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ri->ri_seq = seg_seq;
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ri->ri_segnum = segnum;
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nextnum = nilfs_get_segnum_of_block(nilfs, ssi.next);
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nextnum = nilfs_get_segnum_of_block(nilfs,
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le64_to_cpu(sum->ss_next));
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ri->ri_nextnum = nextnum;
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empty_seg = 0;
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if (!NILFS_SEG_HAS_SR(&ssi) && !scan_newer) {
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flags = le16_to_cpu(sum->ss_flags);
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if (!(flags & NILFS_SS_SR) && !scan_newer) {
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/* This will never happen because a superblock
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(last_segment) always points to a pseg
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having a super root. */
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@ -891,12 +880,12 @@ int nilfs_search_super_root(struct the_nilfs *nilfs,
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__breadahead(nilfs->ns_bdev, b++,
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nilfs->ns_blocksize);
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}
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if (!NILFS_SEG_HAS_SR(&ssi)) {
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if (!ri->ri_lsegs_start && NILFS_SEG_LOGBGN(&ssi)) {
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if (!(flags & NILFS_SS_SR)) {
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if (!ri->ri_lsegs_start && (flags & NILFS_SS_LOGBGN)) {
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ri->ri_lsegs_start = pseg_start;
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ri->ri_lsegs_start_seq = seg_seq;
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}
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if (NILFS_SEG_LOGEND(&ssi))
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if (flags & NILFS_SS_LOGEND)
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ri->ri_lsegs_end = pseg_start;
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goto try_next_pseg;
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}
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@ -907,12 +896,12 @@ int nilfs_search_super_root(struct the_nilfs *nilfs,
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ri->ri_lsegs_start = ri->ri_lsegs_end = 0;
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nilfs_dispose_segment_list(&segments);
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nilfs->ns_pseg_offset = (sr_pseg_start = pseg_start)
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+ ssi.nblocks - seg_start;
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sr_pseg_start = pseg_start;
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nilfs->ns_pseg_offset = pseg_start + nblocks - seg_start;
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nilfs->ns_seg_seq = seg_seq;
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nilfs->ns_segnum = segnum;
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nilfs->ns_cno = cno; /* nilfs->ns_cno = ri->ri_cno + 1 */
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nilfs->ns_ctime = ssi.ctime;
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nilfs->ns_ctime = le64_to_cpu(sum->ss_create);
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nilfs->ns_nextnum = nextnum;
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if (scan_newer)
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@ -923,15 +912,9 @@ int nilfs_search_super_root(struct the_nilfs *nilfs,
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scan_newer = 1;
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}
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/* reset region for roll-forward */
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pseg_start += ssi.nblocks;
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if (pseg_start < seg_end)
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continue;
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goto feed_segment;
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try_next_pseg:
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/* Standing on a course, or met an inconsistent state */
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pseg_start += ssi.nblocks;
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pseg_start += nblocks;
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if (pseg_start < seg_end)
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continue;
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goto feed_segment;
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