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authorMasato Suzuki <masato.suzuki@wdc.com>2017-02-27 20:52:49 +0900
committerJaegeuk Kim <jaegeuk@kernel.org>2017-02-27 10:40:12 -0800
commit7bb3a371d199156cb6a863feab377146b80942c5 (patch)
treed7b02ba2d78e352acfafe32953d5d094dd6bb067
parent4fcf589ad44e50cbe60dea19320d9e71d1a10f22 (diff)
f2fs: Fix zoned block device support
The introduction of the multi-device feature partially broke the support for zoned block devices. In the function f2fs_scan_devices, sbi->devs allocation and initialization is skipped in the case of a single device mount. This result in no device information structure being allocated for the device. This is fine if the device is a regular device, but in the case of a zoned block device, the device zone type array is not initialized, which causes the function __f2fs_issue_discard_zone to fail as get_blkz_type is unable to determine the zone type of a section. Fix this by always allocating and initializing the sbi->devs device information array even in the case of a single device if that device is zoned. For this particular case, make sure to obtain a reference on the single device so that the call to blkdev_put() in destroy_device_list operates as expected. Fixes: 3c62be17d4f562f4 ("f2fs: support multiple devices") Cc: <stable@vger.kernel.org> # v4.10 Signed-off-by: Masato Suzuki <masato.suzuki@wdc.com> Acked-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
-rw-r--r--fs/f2fs/super.c67
1 files changed, 44 insertions, 23 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7571eb297b21..fe714d549a6a 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1743,36 +1743,55 @@ int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
+ unsigned int max_devices = MAX_DEVICES;
int i;
- for (i = 0; i < MAX_DEVICES; i++) {
- if (!RDEV(i).path[0])
+ /* Initialize single device information */
+ if (!RDEV(0).path[0]) {
+ if (!bdev_is_zoned(sbi->sb->s_bdev))
return 0;
+ max_devices = 1;
+ }
- if (i == 0) {
- sbi->devs = kzalloc(sizeof(struct f2fs_dev_info) *
- MAX_DEVICES, GFP_KERNEL);
- if (!sbi->devs)
- return -ENOMEM;
- }
+ /*
+ * Initialize multiple devices information, or single
+ * zoned block device information.
+ */
+ sbi->devs = kcalloc(max_devices, sizeof(struct f2fs_dev_info),
+ GFP_KERNEL);
+ if (!sbi->devs)
+ return -ENOMEM;
- memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
- FDEV(i).total_segments = le32_to_cpu(RDEV(i).total_segments);
- if (i == 0) {
- FDEV(i).start_blk = 0;
- FDEV(i).end_blk = FDEV(i).start_blk +
- (FDEV(i).total_segments <<
- sbi->log_blocks_per_seg) - 1 +
- le32_to_cpu(raw_super->segment0_blkaddr);
- } else {
- FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
- FDEV(i).end_blk = FDEV(i).start_blk +
- (FDEV(i).total_segments <<
- sbi->log_blocks_per_seg) - 1;
- }
+ for (i = 0; i < max_devices; i++) {
- FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
+ if (i > 0 && !RDEV(i).path[0])
+ break;
+
+ if (max_devices == 1) {
+ /* Single zoned block device mount */
+ FDEV(0).bdev =
+ blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
sbi->sb->s_mode, sbi->sb->s_type);
+ } else {
+ /* Multi-device mount */
+ memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
+ FDEV(i).total_segments =
+ le32_to_cpu(RDEV(i).total_segments);
+ if (i == 0) {
+ FDEV(i).start_blk = 0;
+ FDEV(i).end_blk = FDEV(i).start_blk +
+ (FDEV(i).total_segments <<
+ sbi->log_blocks_per_seg) - 1 +
+ le32_to_cpu(raw_super->segment0_blkaddr);
+ } else {
+ FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
+ FDEV(i).end_blk = FDEV(i).start_blk +
+ (FDEV(i).total_segments <<
+ sbi->log_blocks_per_seg) - 1;
+ }
+ FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
+ sbi->sb->s_mode, sbi->sb->s_type);
+ }
if (IS_ERR(FDEV(i).bdev))
return PTR_ERR(FDEV(i).bdev);
@@ -1792,6 +1811,8 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
"Failed to initialize F2FS blkzone information");
return -EINVAL;
}
+ if (max_devices == 1)
+ break;
f2fs_msg(sbi->sb, KERN_INFO,
"Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
i, FDEV(i).path,