[sbates130272-p2pmem:raid5_fixups 3/6] drivers/md/raid5-ppl.c:895:30: sparse: sparse: incorrect type in assignment (different address spaces)

From: kernel test robot
Date: Fri Apr 01 2022 - 00:37:23 EST

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tree: https://github.com/sbates130272/linux-p2pmem.git raid5_fixups
head: 37cb73889e93d24459385229b6925da10648225d
commit: 93ecde7add0ce4b4464e98700e39da53458c2d46 [3/6] md/raid5: Add __rcu annotation to struct disk_info
config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20220401/202204011224.U5aqrW6q-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.2.0-19) 11.2.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://github.com/sbates130272/linux-p2pmem/commit/93ecde7add0ce4b4464e98700e39da53458c2d46
git remote add sbates130272-p2pmem https://github.com/sbates130272/linux-p2pmem.git
git fetch --no-tags sbates130272-p2pmem raid5_fixups
git checkout 93ecde7add0ce4b4464e98700e39da53458c2d46
# save the config file to linux build tree
mkdir build_dir
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/md/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)
drivers/md/raid5-ppl.c: note: in included file:
drivers/md/raid5.h:271:14: sparse: sparse: array of flexible structures
>> drivers/md/raid5-ppl.c:895:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct md_rdev *rdev @@ got struct md_rdev [noderef] __rcu *rdev @@
drivers/md/raid5-ppl.c:895:30: sparse: expected struct md_rdev *rdev
drivers/md/raid5-ppl.c:895:30: sparse: got struct md_rdev [noderef] __rcu *rdev
>> drivers/md/raid5-ppl.c:946:29: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct md_rdev *parity_rdev @@ got struct md_rdev [noderef] __rcu *rdev @@
drivers/md/raid5-ppl.c:946:29: sparse: expected struct md_rdev *parity_rdev
drivers/md/raid5-ppl.c:946:29: sparse: got struct md_rdev [noderef] __rcu *rdev
>> drivers/md/raid5-ppl.c:1417:54: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct md_rdev *rdev @@ got struct md_rdev [noderef] __rcu *rdev @@
drivers/md/raid5-ppl.c:1417:54: sparse: expected struct md_rdev *rdev
drivers/md/raid5-ppl.c:1417:54: sparse: got struct md_rdev [noderef] __rcu *rdev

vim +895 drivers/md/raid5-ppl.c

4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 728
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 729 /*
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 730 * PPL recovery strategy: xor partial parity and data from all modified data
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 731 * disks within a stripe and write the result as the new stripe parity. If all
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 732 * stripe data disks are modified (full stripe write), no partial parity is
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 733 * available, so just xor the data disks.
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 734 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 735 * Recovery of a PPL entry shall occur only if all modified data disks are
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 736 * available and read from all of them succeeds.
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 737 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 738 * A PPL entry applies to a stripe, partial parity size for an entry is at most
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 739 * the size of the chunk. Examples of possible cases for a single entry:
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 740 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 741 * case 0: single data disk write:
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 742 * data0 data1 data2 ppl parity
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 743 * +--------+--------+--------+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 744 * | ------ | ------ | ------ | +----+ | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 745 * | ------ | -data- | ------ | | pp | -> | data1 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 746 * | ------ | -data- | ------ | | pp | -> | data1 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 747 * | ------ | ------ | ------ | +----+ | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 748 * +--------+--------+--------+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 749 * pp_size = data_size
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 750 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 751 * case 1: more than one data disk write:
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 752 * data0 data1 data2 ppl parity
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 753 * +--------+--------+--------+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 754 * | ------ | ------ | ------ | +----+ | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 755 * | -data- | -data- | ------ | | pp | -> | data0 ^ data1 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 756 * | -data- | -data- | ------ | | pp | -> | data0 ^ data1 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 757 * | ------ | ------ | ------ | +----+ | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 758 * +--------+--------+--------+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 759 * pp_size = data_size / modified_data_disks
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 760 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 761 * case 2: write to all data disks (also full stripe write):
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 762 * data0 data1 data2 parity
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 763 * +--------+--------+--------+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 764 * | ------ | ------ | ------ | | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 765 * | -data- | -data- | -data- | --------> | xor all data |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 766 * | ------ | ------ | ------ | --------> | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 767 * | ------ | ------ | ------ | | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 768 * +--------+--------+--------+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 769 * pp_size = 0
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 770 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 771 * The following cases are possible only in other implementations. The recovery
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 772 * code can handle them, but they are not generated at runtime because they can
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 773 * be reduced to cases 0, 1 and 2:
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 774 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 775 * case 3:
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 776 * data0 data1 data2 ppl parity
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 777 * +--------+--------+--------+ +----+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 778 * | ------ | -data- | -data- | | pp | | data1 ^ data2 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 779 * | ------ | -data- | -data- | | pp | -> | data1 ^ data2 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 780 * | -data- | -data- | -data- | | -- | -> | xor all data |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 781 * | -data- | -data- | ------ | | pp | | data0 ^ data1 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 782 * +--------+--------+--------+ +----+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 783 * pp_size = chunk_size
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 784 *
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 785 * case 4:
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 786 * data0 data1 data2 ppl parity
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 787 * +--------+--------+--------+ +----+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 788 * | ------ | -data- | ------ | | pp | | data1 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 789 * | ------ | ------ | ------ | | -- | -> | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 790 * | ------ | ------ | ------ | | -- | -> | (no change) |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 791 * | -data- | ------ | ------ | | pp | | data0 ^ pp |
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 792 * +--------+--------+--------+ +----+ +--------------------+
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 793 * pp_size = chunk_size
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 794 */
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 795 static int ppl_recover_entry(struct ppl_log *log, struct ppl_header_entry *e,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 796 sector_t ppl_sector)
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 797 {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 798 struct ppl_conf *ppl_conf = log->ppl_conf;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 799 struct mddev *mddev = ppl_conf->mddev;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 800 struct r5conf *conf = mddev->private;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 801 int block_size = ppl_conf->block_size;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 802 struct page *page1;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 803 struct page *page2;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 804 sector_t r_sector_first;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 805 sector_t r_sector_last;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 806 int strip_sectors;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 807 int data_disks;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 808 int i;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 809 int ret = 0;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 810 char b[BDEVNAME_SIZE];
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 811 unsigned int pp_size = le32_to_cpu(e->pp_size);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 812 unsigned int data_size = le32_to_cpu(e->data_size);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 813
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 814 page1 = alloc_page(GFP_KERNEL);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 815 page2 = alloc_page(GFP_KERNEL);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 816
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 817 if (!page1 || !page2) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 818 ret = -ENOMEM;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 819 goto out;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 820 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 821
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 822 r_sector_first = le64_to_cpu(e->data_sector) * (block_size >> 9);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 823
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 824 if ((pp_size >> 9) < conf->chunk_sectors) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 825 if (pp_size > 0) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 826 data_disks = data_size / pp_size;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 827 strip_sectors = pp_size >> 9;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 828 } else {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 829 data_disks = conf->raid_disks - conf->max_degraded;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 830 strip_sectors = (data_size >> 9) / data_disks;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 831 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 832 r_sector_last = r_sector_first +
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 833 (data_disks - 1) * conf->chunk_sectors +
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 834 strip_sectors;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 835 } else {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 836 data_disks = conf->raid_disks - conf->max_degraded;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 837 strip_sectors = conf->chunk_sectors;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 838 r_sector_last = r_sector_first + (data_size >> 9);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 839 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 840
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 841 pr_debug("%s: array sector first: %llu last: %llu\n", __func__,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 842 (unsigned long long)r_sector_first,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 843 (unsigned long long)r_sector_last);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 844
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 845 /* if start and end is 4k aligned, use a 4k block */
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 846 if (block_size == 512 &&
c911c46c017c74 Yufen Yu 2020-07-18 847 (r_sector_first & (RAID5_STRIPE_SECTORS(conf) - 1)) == 0 &&
c911c46c017c74 Yufen Yu 2020-07-18 848 (r_sector_last & (RAID5_STRIPE_SECTORS(conf) - 1)) == 0)
c911c46c017c74 Yufen Yu 2020-07-18 849 block_size = RAID5_STRIPE_SIZE(conf);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 850
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 851 /* iterate through blocks in strip */
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 852 for (i = 0; i < strip_sectors; i += (block_size >> 9)) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 853 bool update_parity = false;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 854 sector_t parity_sector;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 855 struct md_rdev *parity_rdev;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 856 struct stripe_head sh;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 857 int disk;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 858 int indent = 0;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 859
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 860 pr_debug("%s:%*s iter %d start\n", __func__, indent, "", i);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 861 indent += 2;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 862
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 863 memset(page_address(page1), 0, PAGE_SIZE);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 864
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 865 /* iterate through data member disks */
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 866 for (disk = 0; disk < data_disks; disk++) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 867 int dd_idx;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 868 struct md_rdev *rdev;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 869 sector_t sector;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 870 sector_t r_sector = r_sector_first + i +
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 871 (disk * conf->chunk_sectors);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 872
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 873 pr_debug("%s:%*s data member disk %d start\n",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 874 __func__, indent, "", disk);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 875 indent += 2;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 876
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 877 if (r_sector >= r_sector_last) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 878 pr_debug("%s:%*s array sector %llu doesn't need parity update\n",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 879 __func__, indent, "",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 880 (unsigned long long)r_sector);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 881 indent -= 2;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 882 continue;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 883 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 884
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 885 update_parity = true;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 886
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 887 /* map raid sector to member disk */
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 888 sector = raid5_compute_sector(conf, r_sector, 0,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 889 &dd_idx, NULL);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 890 pr_debug("%s:%*s processing array sector %llu => data member disk %d, sector %llu\n",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 891 __func__, indent, "",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 892 (unsigned long long)r_sector, dd_idx,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 893 (unsigned long long)sector);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 894
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 @895 rdev = conf->disks[dd_idx].rdev;
07719ff767dcd8 Artur Paszkiewicz 2017-09-29 896 if (!rdev || (!test_bit(In_sync, &rdev->flags) &&
07719ff767dcd8 Artur Paszkiewicz 2017-09-29 897 sector >= rdev->recovery_offset)) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 898 pr_debug("%s:%*s data member disk %d missing\n",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 899 __func__, indent, "", dd_idx);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 900 update_parity = false;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 901 break;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 902 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 903
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 904 pr_debug("%s:%*s reading data member disk %s sector %llu\n",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 905 __func__, indent, "", bdevname(rdev->bdev, b),
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 906 (unsigned long long)sector);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 907 if (!sync_page_io(rdev, sector, block_size, page2,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 908 REQ_OP_READ, 0, false)) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 909 md_error(mddev, rdev);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 910 pr_debug("%s:%*s read failed!\n", __func__,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 911 indent, "");
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 912 ret = -EIO;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 913 goto out;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 914 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 915
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 916 ppl_xor(block_size, page1, page2);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 917
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 918 indent -= 2;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 919 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 920
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 921 if (!update_parity)
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 922 continue;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 923
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 924 if (pp_size > 0) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 925 pr_debug("%s:%*s reading pp disk sector %llu\n",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 926 __func__, indent, "",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 927 (unsigned long long)(ppl_sector + i));
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 928 if (!sync_page_io(log->rdev,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 929 ppl_sector - log->rdev->data_offset + i,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 930 block_size, page2, REQ_OP_READ, 0,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 931 false)) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 932 pr_debug("%s:%*s read failed!\n", __func__,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 933 indent, "");
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 934 md_error(mddev, log->rdev);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 935 ret = -EIO;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 936 goto out;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 937 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 938
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 939 ppl_xor(block_size, page1, page2);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 940 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 941
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 942 /* map raid sector to parity disk */
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 943 parity_sector = raid5_compute_sector(conf, r_sector_first + i,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 944 0, &disk, &sh);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 945 BUG_ON(sh.pd_idx != le32_to_cpu(e->parity_disk));
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 @946 parity_rdev = conf->disks[sh.pd_idx].rdev;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 947
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 948 BUG_ON(parity_rdev->bdev->bd_dev != log->rdev->bdev->bd_dev);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 949 pr_debug("%s:%*s write parity at sector %llu, disk %s\n",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 950 __func__, indent, "",
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 951 (unsigned long long)parity_sector,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 952 bdevname(parity_rdev->bdev, b));
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 953 if (!sync_page_io(parity_rdev, parity_sector, block_size,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 954 page1, REQ_OP_WRITE, 0, false)) {
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 955 pr_debug("%s:%*s parity write error!\n", __func__,
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 956 indent, "");
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 957 md_error(mddev, parity_rdev);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 958 ret = -EIO;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 959 goto out;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 960 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 961 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 962 out:
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 963 if (page1)
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 964 __free_page(page1);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 965 if (page2)
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 966 __free_page(page2);
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 967 return ret;
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 968 }
4536bf9ba2d034 Artur Paszkiewicz 2017-03-09 969

:::::: The code at line 895 was first introduced by commit
:::::: 4536bf9ba2d03404655586b07f8830b6f2106242 raid5-ppl: load and recover the log

:::::: TO: Artur Paszkiewicz <artur.paszkiewicz@xxxxxxxxx>
:::::: CC: Shaohua Li <shli@xxxxxx>

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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