Dave Jones hit a WARN_ON(nr < 0) in btrfs_wait_ordered_roots() with
v4.12-rc6. This was because commit 70e7af244 made it possible for
calc_reclaim_items_nr() to return a negative number. It's not really a
bug in that commit, it just didn't go far enough down the stack to find
all the possible 64->32 bit overflows.
This switches calc_reclaim_items_nr() to return a u64 and changes everyone
that uses the results of that math to u64 as well.
Reported-by: Dave Jones <da...@codemonkey.org.uk>
Fixes: 70e7af244f24c94604ef6eca32ad297632018583
Signed-off-by: Chris Mason <c...@fb.com>
---
fs/btrfs/dev-replace.c | 4 ++--
fs/btrfs/extent-tree.c | 10 +++++-----
fs/btrfs/ioctl.c | 2 +-
fs/btrfs/ordered-data.c | 17 ++++++++---------
fs/btrfs/ordered-data.h | 4 ++--
fs/btrfs/qgroup.c | 2 +-
fs/btrfs/relocation.c | 2 +-
fs/btrfs/scrub.c | 2 +-
fs/btrfs/super.c | 2 +-
fs/btrfs/transaction.c | 2 +-
10 files changed, 23 insertions(+), 24 deletions(-)
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 5fe1ca8..bee3ede 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -388,7 +388,7 @@ int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
if (ret)
btrfs_err(fs_info, "kobj add dev failed %d", ret);
- btrfs_wait_ordered_roots(fs_info, -1, 0, (u64)-1);
+ btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
/* force writing the updated state information to disk */
trans = btrfs_start_transaction(root, 0);
@@ -507,7 +507,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info
*fs_info,
mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
return ret;
}
- btrfs_wait_ordered_roots(fs_info, -1, 0, (u64)-1);
+ btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 33d979e9..d675324 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4238,7 +4238,7 @@ int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode
*inode, u64 bytes)
if (need_commit > 0) {
btrfs_start_delalloc_roots(fs_info, 0, -1);
- btrfs_wait_ordered_roots(fs_info, -1, 0,
+ btrfs_wait_ordered_roots(fs_info, U64_MAX, 0,
(u64)-1);
}
@@ -4698,11 +4698,11 @@ static void btrfs_writeback_inodes_sb_nr(struct
btrfs_fs_info *fs_info,
}
}
-static inline int calc_reclaim_items_nr(struct btrfs_fs_info *fs_info,
+static inline u64 calc_reclaim_items_nr(struct btrfs_fs_info *fs_info,
u64 to_reclaim)
{
u64 bytes;
- int nr;
+ u64 nr;
bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
nr = (int)div64_u64(to_reclaim, bytes);
@@ -4725,15 +4725,15 @@ static void shrink_delalloc(struct btrfs_root *root,
u64 to_reclaim, u64 orig,
struct btrfs_trans_handle *trans;
u64 delalloc_bytes;
u64 max_reclaim;
+ u64 items;
long time_left;
unsigned long nr_pages;
int loops;
- int items;
enum btrfs_reserve_flush_enum flush;
/* Calc the number of the pages we need flush for space reservation */
items = calc_reclaim_items_nr(fs_info, to_reclaim);
- to_reclaim = (u64)items * EXTENT_SIZE_PER_ITEM;
+ to_reclaim = items * EXTENT_SIZE_PER_ITEM;
trans = (struct btrfs_trans_handle *)current->journal_info;
block_rsv = &fs_info->delalloc_block_rsv;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index e176375..7712217 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -689,7 +689,7 @@ static int create_snapshot(struct btrfs_root *root, struct
inode *dir,
if (ret)
goto dec_and_free;
- btrfs_wait_ordered_extents(root, -1, 0, (u64)-1);
+ btrfs_wait_ordered_extents(root, U64_MAX, 0, (u64)-1);
btrfs_init_block_rsv(&pending_snapshot->block_rsv,
BTRFS_BLOCK_RSV_TEMP);
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 7b40e2e..a3aca49 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -663,7 +663,7 @@ static void btrfs_run_ordered_extent_work(struct btrfs_work
*work)
* wait for all the ordered extents in a root. This is done when balancing
* space between drives.
*/
-int btrfs_wait_ordered_extents(struct btrfs_root *root, int nr,
+u64 btrfs_wait_ordered_extents(struct btrfs_root *root, u64 nr,
const u64 range_start, const u64 range_len)
{
struct btrfs_fs_info *fs_info = root->fs_info;
@@ -671,7 +671,7 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root, int
nr,
LIST_HEAD(skipped);
LIST_HEAD(works);
struct btrfs_ordered_extent *ordered, *next;
- int count = 0;
+ u64 count = 0;
const u64 range_end = range_start + range_len;
mutex_lock(&root->ordered_extent_mutex);
@@ -701,7 +701,7 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root, int
nr,
cond_resched();
spin_lock(&root->ordered_extent_lock);
- if (nr != -1)
+ if (nr != U64_MAX)
nr--;
count++;
}
@@ -720,13 +720,13 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root,
int nr,
return count;
}
-int btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr,
- const u64 range_start, const u64 range_len)
+u64 btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
+ const u64 range_start, const u64 range_len)
{
struct btrfs_root *root;
struct list_head splice;
- int done;
- int total_done = 0;
+ u64 total_done = 0;
+ u64 done;
INIT_LIST_HEAD(&splice);
@@ -748,9 +748,8 @@ int btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info,
int nr,
total_done += done;
spin_lock(&fs_info->ordered_root_lock);
- if (nr != -1) {
+ if (nr != U64_MAX) {
nr -= done;
- WARN_ON(nr < 0);
}
}
list_splice_tail(&splice, &fs_info->ordered_roots);
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index e0c1d5b..56c4c0e 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -200,9 +200,9 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64
offset,
struct btrfs_ordered_extent *ordered);
int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
u32 *sum, int len);
-int btrfs_wait_ordered_extents(struct btrfs_root *root, int nr,
+u64 btrfs_wait_ordered_extents(struct btrfs_root *root, u64 nr,
const u64 range_start, const u64 range_len);
-int btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr,
+u64 btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
const u64 range_start, const u64 range_len);
void btrfs_get_logged_extents(struct btrfs_inode *inode,
struct list_head *logged_list,
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index deffbeb..25ef976 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2376,7 +2376,7 @@ static int qgroup_reserve(struct btrfs_root *root, u64
num_bytes, bool enforce)
ret = btrfs_start_delalloc_inodes(root, 0);
if (ret)
return ret;
- btrfs_wait_ordered_extents(root, -1, 0,
(u64)-1);
+ btrfs_wait_ordered_extents(root, U64_MAX, 0,
(u64)-1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index d60df51..c16abd7 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4372,7 +4372,7 @@ int btrfs_relocate_block_group(struct btrfs_fs_info
*fs_info, u64 group_start)
btrfs_wait_block_group_reservations(rc->block_group);
btrfs_wait_nocow_writers(rc->block_group);
- btrfs_wait_ordered_roots(fs_info, -1,
+ btrfs_wait_ordered_roots(fs_info, U64_MAX,
rc->block_group->key.objectid,
rc->block_group->key.offset);
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index c7b45eb..b8a079e 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -3859,7 +3859,7 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
*/
btrfs_wait_block_group_reservations(cache);
btrfs_wait_nocow_writers(cache);
- ret = btrfs_wait_ordered_roots(fs_info, -1,
+ ret = btrfs_wait_ordered_roots(fs_info, U64_MAX,
cache->key.objectid,
cache->key.offset);
if (ret > 0) {
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 4f1cdd5..0066f2d 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1187,7 +1187,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
return 0;
}
- btrfs_wait_ordered_roots(fs_info, -1, 0, (u64)-1);
+ btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
trans = btrfs_attach_transaction_barrier(root);
if (IS_ERR(trans)) {
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 2168654..0a3023a 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1926,7 +1926,7 @@ static inline int btrfs_start_delalloc_flush(struct
btrfs_fs_info *fs_info)
static inline void btrfs_wait_delalloc_flush(struct btrfs_fs_info *fs_info)
{
if (btrfs_test_opt(fs_info, FLUSHONCOMMIT))
- btrfs_wait_ordered_roots(fs_info, -1, 0, (u64)-1);
+ btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
}
static inline void
--
2.9.3
--
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