Commit f6f72f32 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Mike Snitzer
Browse files

dm integrity: don't replay journal data past the end of the device 



Following commits will make it possible to shrink or extend the device. If
the device was shrunk, we don't want to replay journal data pointing past
the end of the device.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 7649194a

drivers/md/dm-integrity.c

+4 −0
Original line number Diff line number Diff line
@@ -2194,6 +2194,8 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start, 
					sec &= ~(sector_t)(ic->sectors_per_block - 1);

				}

			}

			if (unlikely(sec >= ic->provided_data_sectors))

				continue;

			get_area_and_offset(ic, sec, &area, &offset);

			restore_last_bytes(ic, access_journal_data(ic, i, j), je);

			for (k = j + 1; k < ic->journal_section_entries; k++) {
@@ -2203,6 +2205,8 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start, 
					break;

				BUG_ON(unlikely(journal_entry_is_inprogress(je2)) && !from_replay);

				sec2 = journal_entry_get_sector(je2);

				if (unlikely(sec2 >= ic->provided_data_sectors))

					break;

				get_area_and_offset(ic, sec2, &area2, &offset2);

				if (area2 != area || offset2 != offset + ((k - j) << ic->sb->log2_sectors_per_block))

					break;

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