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-rw-r--r--fs/btrfs/scrub.c54
1 files changed, 31 insertions, 23 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 78759bc9c980..8026606f7510 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -130,7 +130,7 @@ struct scrub_parity {
int nsectors;
- u64 stripe_len;
+ u32 stripe_len;
refcount_t refs;
@@ -233,7 +233,7 @@ static void scrub_parity_get(struct scrub_parity *sparity);
static void scrub_parity_put(struct scrub_parity *sparity);
static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx,
struct scrub_page *spage);
-static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
+static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u32 len,
u64 physical, struct btrfs_device *dev, u64 flags,
u64 gen, int mirror_num, u8 *csum,
u64 physical_for_dev_replace);
@@ -241,7 +241,7 @@ static void scrub_bio_end_io(struct bio *bio);
static void scrub_bio_end_io_worker(struct btrfs_work *work);
static void scrub_block_complete(struct scrub_block *sblock);
static void scrub_remap_extent(struct btrfs_fs_info *fs_info,
- u64 extent_logical, u64 extent_len,
+ u64 extent_logical, u32 extent_len,
u64 *extent_physical,
struct btrfs_device **extent_dev,
int *extent_mirror_num);
@@ -2147,7 +2147,7 @@ bbio_out:
spin_unlock(&sctx->stat_lock);
}
-static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
+static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u32 len,
u64 physical, struct btrfs_device *dev, u64 flags,
u64 gen, int mirror_num, u8 *csum,
u64 physical_for_dev_replace)
@@ -2171,7 +2171,7 @@ static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
for (index = 0; len > 0; index++) {
struct scrub_page *spage;
- u64 l = min_t(u64, len, PAGE_SIZE);
+ u32 l = min_t(u32, len, PAGE_SIZE);
spage = kzalloc(sizeof(*spage), GFP_KERNEL);
if (!spage) {
@@ -2292,10 +2292,9 @@ static void scrub_bio_end_io_worker(struct btrfs_work *work)
static inline void __scrub_mark_bitmap(struct scrub_parity *sparity,
unsigned long *bitmap,
- u64 start, u64 len)
+ u64 start, u32 len)
{
u64 offset;
- u64 nsectors64;
u32 nsectors;
u32 sectorsize_bits = sparity->sctx->fs_info->sectorsize_bits;
@@ -2307,10 +2306,7 @@ static inline void __scrub_mark_bitmap(struct scrub_parity *sparity,
start -= sparity->logic_start;
start = div64_u64_rem(start, sparity->stripe_len, &offset);
offset = offset >> sectorsize_bits;
- nsectors64 = len >> sectorsize_bits;
-
- ASSERT(nsectors64 < UINT_MAX);
- nsectors = (u32)nsectors64;
+ nsectors = len >> sectorsize_bits;
if (offset + nsectors <= sparity->nsectors) {
bitmap_set(bitmap, offset, nsectors);
@@ -2322,13 +2318,13 @@ static inline void __scrub_mark_bitmap(struct scrub_parity *sparity,
}
static inline void scrub_parity_mark_sectors_error(struct scrub_parity *sparity,
- u64 start, u64 len)
+ u64 start, u32 len)
{
__scrub_mark_bitmap(sparity, sparity->ebitmap, start, len);
}
static inline void scrub_parity_mark_sectors_data(struct scrub_parity *sparity,
- u64 start, u64 len)
+ u64 start, u32 len)
{
__scrub_mark_bitmap(sparity, sparity->dbitmap, start, len);
}
@@ -2356,6 +2352,7 @@ static void scrub_block_complete(struct scrub_block *sblock)
u64 end = sblock->pagev[sblock->page_count - 1]->logical +
PAGE_SIZE;
+ ASSERT(end - start <= U32_MAX);
scrub_parity_mark_sectors_error(sblock->sparity,
start, end - start);
}
@@ -2425,7 +2422,7 @@ static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum)
/* scrub extent tries to collect up to 64 kB for each bio */
static int scrub_extent(struct scrub_ctx *sctx, struct map_lookup *map,
- u64 logical, u64 len,
+ u64 logical, u32 len,
u64 physical, struct btrfs_device *dev, u64 flags,
u64 gen, int mirror_num, u64 physical_for_dev_replace)
{
@@ -2457,7 +2454,7 @@ static int scrub_extent(struct scrub_ctx *sctx, struct map_lookup *map,
}
while (len) {
- u64 l = min_t(u64, len, blocksize);
+ u32 l = min(len, blocksize);
int have_csum = 0;
if (flags & BTRFS_EXTENT_FLAG_DATA) {
@@ -2480,7 +2477,7 @@ static int scrub_extent(struct scrub_ctx *sctx, struct map_lookup *map,
}
static int scrub_pages_for_parity(struct scrub_parity *sparity,
- u64 logical, u64 len,
+ u64 logical, u32 len,
u64 physical, struct btrfs_device *dev,
u64 flags, u64 gen, int mirror_num, u8 *csum)
{
@@ -2506,7 +2503,7 @@ static int scrub_pages_for_parity(struct scrub_parity *sparity,
for (index = 0; len > 0; index++) {
struct scrub_page *spage;
- u64 l = min_t(u64, len, PAGE_SIZE);
+ u32 l = min_t(u32, len, PAGE_SIZE);
spage = kzalloc(sizeof(*spage), GFP_KERNEL);
if (!spage) {
@@ -2564,7 +2561,7 @@ leave_nomem:
}
static int scrub_extent_for_parity(struct scrub_parity *sparity,
- u64 logical, u64 len,
+ u64 logical, u32 len,
u64 physical, struct btrfs_device *dev,
u64 flags, u64 gen, int mirror_num)
{
@@ -2588,7 +2585,7 @@ static int scrub_extent_for_parity(struct scrub_parity *sparity,
}
while (len) {
- u64 l = min_t(u64, len, blocksize);
+ u32 l = min(len, blocksize);
int have_csum = 0;
if (flags & BTRFS_EXTENT_FLAG_DATA) {
@@ -2792,7 +2789,8 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
u64 generation;
u64 extent_logical;
u64 extent_physical;
- u64 extent_len;
+ /* Check the comment in scrub_stripe() for why u32 is enough here */
+ u32 extent_len;
u64 mapped_length;
struct btrfs_device *extent_dev;
struct scrub_parity *sparity;
@@ -2801,6 +2799,7 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
int extent_mirror_num;
int stop_loop = 0;
+ ASSERT(map->stripe_len <= U32_MAX);
nsectors = map->stripe_len >> fs_info->sectorsize_bits;
bitmap_len = scrub_calc_parity_bitmap_len(nsectors);
sparity = kzalloc(sizeof(struct scrub_parity) + 2 * bitmap_len,
@@ -2812,6 +2811,7 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
return -ENOMEM;
}
+ ASSERT(map->stripe_len <= U32_MAX);
sparity->stripe_len = map->stripe_len;
sparity->nsectors = nsectors;
sparity->sctx = sctx;
@@ -2906,6 +2906,7 @@ static noinline_for_stack int scrub_raid56_parity(struct scrub_ctx *sctx,
}
again:
extent_logical = key.objectid;
+ ASSERT(bytes <= U32_MAX);
extent_len = bytes;
if (extent_logical < logic_start) {
@@ -2984,9 +2985,11 @@ next:
logic_start += map->stripe_len;
}
out:
- if (ret < 0)
+ if (ret < 0) {
+ ASSERT(logic_end - logic_start <= U32_MAX);
scrub_parity_mark_sectors_error(sparity, logic_start,
logic_end - logic_start);
+ }
scrub_parity_put(sparity);
scrub_submit(sctx);
mutex_lock(&sctx->wr_lock);
@@ -3028,7 +3031,11 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
u64 offset;
u64 extent_logical;
u64 extent_physical;
- u64 extent_len;
+ /*
+ * Unlike chunk length, extent length should never go beyond
+ * BTRFS_MAX_EXTENT_SIZE, thus u32 is enough here.
+ */
+ u32 extent_len;
u64 stripe_logical;
u64 stripe_end;
struct btrfs_device *extent_dev;
@@ -3277,6 +3284,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
again:
extent_logical = key.objectid;
+ ASSERT(bytes <= U32_MAX);
extent_len = bytes;
/*
@@ -4074,7 +4082,7 @@ int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
}
static void scrub_remap_extent(struct btrfs_fs_info *fs_info,
- u64 extent_logical, u64 extent_len,
+ u64 extent_logical, u32 extent_len,
u64 *extent_physical,
struct btrfs_device **extent_dev,
int *extent_mirror_num)
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-25 04:56:43 +0000