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authorStefan Behrens <sbehrens@giantdisaster.de>2012-03-27 14:21:26 -0400
committerChris Mason <chris.mason@oracle.com>2012-03-27 14:21:26 -0400
commit1623edebee317855c6a854366c01d1630cc537c9 (patch)
treed2b79580ce85e26c89a257be0400c58c966ee4c6 /fs/btrfs
parent94598ba8d8ff066115508fb99e593d2de1ca67e1 (diff)
downloadlinux-stericsson-1623edebee317855c6a854366c01d1630cc537c9.tar.gz
Btrfs: minor cleanup in scrub
Just a minor cleanup commit in preparation for the big block changes. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/scrub.c61
1 files changed, 25 insertions, 36 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index abc0fbffa510..e68bab4ffcd4 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -36,28 +36,11 @@
* Future enhancements:
* - In case an unrepairable extent is encountered, track which files are
* affected and report them
- * - In case of a read error on files with nodatasum, map the file and read
- * the extent to trigger a writeback of the good copy
* - track and record media errors, throw out bad devices
* - add a mode to also read unallocated space
*/
-struct scrub_bio;
-struct scrub_page;
struct scrub_dev;
-static void scrub_bio_end_io(struct bio *bio, int err);
-static void scrub_checksum(struct btrfs_work *work);
-static int scrub_checksum_data(struct scrub_dev *sdev,
- struct scrub_page *spag, void *buffer);
-static int scrub_checksum_tree_block(struct scrub_dev *sdev,
- struct scrub_page *spag, u64 logical,
- void *buffer);
-static int scrub_checksum_super(struct scrub_bio *sbio, void *buffer);
-static int scrub_fixup_check(struct scrub_bio *sbio, int ix);
-static void scrub_fixup_end_io(struct bio *bio, int err);
-static int scrub_fixup_io(int rw, struct block_device *bdev, sector_t sector,
- struct page *page);
-static void scrub_fixup(struct scrub_bio *sbio, int ix);
#define SCRUB_PAGES_PER_BIO 16 /* 64k per bio */
#define SCRUB_BIOS_PER_DEV 16 /* 1 MB per device in flight */
@@ -124,6 +107,21 @@ struct scrub_warning {
int scratch_bufsize;
};
+static void scrub_bio_end_io(struct bio *bio, int err);
+static void scrub_checksum(struct btrfs_work *work);
+static int scrub_checksum_data(struct scrub_dev *sdev,
+ struct scrub_page *spag, void *buffer);
+static int scrub_checksum_tree_block(struct scrub_dev *sdev,
+ struct scrub_page *spag, u64 logical,
+ void *buffer);
+static int scrub_checksum_super(struct scrub_bio *sbio, void *buffer);
+static int scrub_fixup_check(struct scrub_bio *sbio, int ix);
+static void scrub_fixup_end_io(struct bio *bio, int err);
+static int scrub_fixup_io(int rw, struct block_device *bdev, sector_t sector,
+ struct page *page);
+static void scrub_fixup(struct scrub_bio *sbio, int ix);
+
+
static void scrub_free_csums(struct scrub_dev *sdev)
{
while (!list_empty(&sdev->csum_list)) {
@@ -342,7 +340,8 @@ static void scrub_print_warning(const char *errstr, struct scrub_bio *sbio,
do {
ret = tree_backref_for_extent(&ptr, eb, ei, item_size,
&ref_root, &ref_level);
- printk(KERN_WARNING "%s at logical %llu on dev %s, "
+ printk(KERN_WARNING
+ "btrfs: %s at logical %llu on dev %s, "
"sector %llu: metadata %s (level %d) in tree "
"%llu\n", errstr, swarn.logical, dev->name,
(unsigned long long)swarn.sector,
@@ -948,12 +947,12 @@ static int scrub_checksum_super(struct scrub_bio *sbio, void *buffer)
return fail;
}
-static int scrub_submit(struct scrub_dev *sdev)
+static void scrub_submit(struct scrub_dev *sdev)
{
struct scrub_bio *sbio;
if (sdev->curr == -1)
- return 0;
+ return;
sbio = sdev->bios[sdev->curr];
sbio->err = 0;
@@ -961,8 +960,6 @@ static int scrub_submit(struct scrub_dev *sdev)
atomic_inc(&sdev->in_flight);
btrfsic_submit_bio(READ, sbio->bio);
-
- return 0;
}
static int scrub_page(struct scrub_dev *sdev, u64 logical, u64 len,
@@ -1008,9 +1005,7 @@ again:
sbio->bio = bio;
} else if (sbio->physical + sbio->count * PAGE_SIZE != physical ||
sbio->logical + sbio->count * PAGE_SIZE != logical) {
- ret = scrub_submit(sdev);
- if (ret)
- return ret;
+ scrub_submit(sdev);
goto again;
}
sbio->spag[sbio->count].flags = flags;
@@ -1025,9 +1020,7 @@ again:
ret = bio_add_page(sbio->bio, page, PAGE_SIZE, 0);
if (!ret) {
__free_page(page);
- ret = scrub_submit(sdev);
- if (ret)
- return ret;
+ scrub_submit(sdev);
goto again;
}
@@ -1036,13 +1029,8 @@ again:
memcpy(sbio->spag[sbio->count].csum, csum, sdev->csum_size);
}
++sbio->count;
- if (sbio->count == SCRUB_PAGES_PER_BIO || force) {
- int ret;
-
- ret = scrub_submit(sdev);
- if (ret)
- return ret;
- }
+ if (sbio->count == SCRUB_PAGES_PER_BIO || force)
+ scrub_submit(sdev);
return 0;
}
@@ -1520,7 +1508,7 @@ static noinline_for_stack int scrub_supers(struct scrub_dev *sdev)
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
bytenr = btrfs_sb_offset(i);
- if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes)
+ if (bytenr + BTRFS_SUPER_INFO_SIZE > device->total_bytes)
break;
ret = scrub_page(sdev, bytenr, PAGE_SIZE, bytenr,
@@ -1741,6 +1729,7 @@ int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev)
return 0;
}
+
int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid)
{
struct btrfs_fs_info *fs_info = root->fs_info;