* [PATCH 2/2] Btrfs: kill some BUG_ONs() in the find_parent_nodes()
@ 2013-03-25 11:09 Wang Shilong
2013-03-25 11:47 ` Jan Schmidt
0 siblings, 1 reply; 3+ messages in thread
From: Wang Shilong @ 2013-03-25 11:09 UTC (permalink / raw)
To: linux-btrfs; +Cc: wangshilong1991, sensille
From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
The reason that BUG_ON() happens in these places is just
because of ENOMEM.
We try ro return ENOMEM rather than trigger BUG_ON(), the
caller will abort the transaction thus avoiding the kernel panic.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
---
fs/btrfs/backref.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index bd605c8..a5e2beb 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -900,7 +900,8 @@ again:
if (ref->count && ref->root_id && ref->parent == 0) {
/* no parent == root of tree */
ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS);
- BUG_ON(ret < 0);
+ if (ret)
+ goto out;
}
if (ref->count && ref->parent) {
struct extent_inode_elem *eie = NULL;
@@ -920,6 +921,8 @@ again:
ret = ulist_add_merge(refs, ref->parent,
(uintptr_t)ref->inode_list,
(u64 *)&eie, GFP_NOFS);
+ if (ret)
+ goto out;
if (!ret && extent_item_pos) {
/*
* we've recorded that parent, so we must extend
@@ -930,7 +933,6 @@ again:
eie = eie->next;
eie->next = ref->inode_list;
}
- BUG_ON(ret < 0);
}
kfree(ref);
}
--
1.7.7.6
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH 2/2] Btrfs: kill some BUG_ONs() in the find_parent_nodes()
2013-03-25 11:09 [PATCH 2/2] Btrfs: kill some BUG_ONs() in the find_parent_nodes() Wang Shilong
@ 2013-03-25 11:47 ` Jan Schmidt
2013-03-25 12:22 ` Wang Shilong
0 siblings, 1 reply; 3+ messages in thread
From: Jan Schmidt @ 2013-03-25 11:47 UTC (permalink / raw)
To: Wang Shilong; +Cc: linux-btrfs, sensille
On Mon, March 25, 2013 at 12:09 (+0100), Wang Shilong wrote:
> From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
>
> The reason that BUG_ON() happens in these places is just
> because of ENOMEM.
>
> We try ro return ENOMEM rather than trigger BUG_ON(), the
> caller will abort the transaction thus avoiding the kernel panic.
>
> Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
> ---
> fs/btrfs/backref.c | 6 ++++--
> 1 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
> index bd605c8..a5e2beb 100644
> --- a/fs/btrfs/backref.c
> +++ b/fs/btrfs/backref.c
> @@ -900,7 +900,8 @@ again:
> if (ref->count && ref->root_id && ref->parent == 0) {
> /* no parent == root of tree */
> ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS);
> - BUG_ON(ret < 0);
> + if (ret)
> + goto out;
> }
> if (ref->count && ref->parent) {
> struct extent_inode_elem *eie = NULL;
> @@ -920,6 +921,8 @@ again:
> ret = ulist_add_merge(refs, ref->parent,
> (uintptr_t)ref->inode_list,
> (u64 *)&eie, GFP_NOFS);
> + if (ret)
> + goto out;
> if (!ret && extent_item_pos) {
Remove ret here, too, please.
> /*
> * we've recorded that parent, so we must extend
> @@ -930,7 +933,6 @@ again:
> eie = eie->next;
> eie->next = ref->inode_list;
> }
> - BUG_ON(ret < 0);
> }
> kfree(ref);
> }
>
Otherwise,
Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Thanks!
-Jan
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH 2/2] Btrfs: kill some BUG_ONs() in the find_parent_nodes()
2013-03-25 11:47 ` Jan Schmidt
@ 2013-03-25 12:22 ` Wang Shilong
0 siblings, 0 replies; 3+ messages in thread
From: Wang Shilong @ 2013-03-25 12:22 UTC (permalink / raw)
To: Jan Schmidt; +Cc: linux-btrfs, sensille
Hello,
>
> On Mon, March 25, 2013 at 12:09 (+0100), Wang Shilong wrote:
>> From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
>>
>> The reason that BUG_ON() happens in these places is just
>> because of ENOMEM.
>>
>> We try ro return ENOMEM rather than trigger BUG_ON(), the
>> caller will abort the transaction thus avoiding the kernel panic.
>>
>> Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
>> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
>> ---
>> fs/btrfs/backref.c | 6 ++++--
>> 1 files changed, 4 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
>> index bd605c8..a5e2beb 100644
>> --- a/fs/btrfs/backref.c
>> +++ b/fs/btrfs/backref.c
>> @@ -900,7 +900,8 @@ again:
>> if (ref->count && ref->root_id && ref->parent == 0) {
>> /* no parent == root of tree */
>> ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS);
>> - BUG_ON(ret < 0);
>> + if (ret)
>> + goto out;
>> }
>> if (ref->count && ref->parent) {
>> struct extent_inode_elem *eie = NULL;
>> @@ -920,6 +921,8 @@ again:
>> ret = ulist_add_merge(refs, ref->parent,
>> (uintptr_t)ref->inode_list,
>> (u64 *)&eie, GFP_NOFS);
>> + if (ret)
>> + goto out;
>> if (!ret && extent_item_pos) {
>
> Remove ret here, too, please.
Thanks for reviewing! I've addressed your comments and
V2 has been sent out.
Thanks,
Wang
>
>> /*
>> * we've recorded that parent, so we must extend
>> @@ -930,7 +933,6 @@ again:
>> eie = eie->next;
>> eie->next = ref->inode_list;
>> }
>> - BUG_ON(ret < 0);
>> }
>> kfree(ref);
>> }
>>
>
> Otherwise,
>
> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
>
> Thanks!
> -Jan
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-03-25 12:22 UTC | newest]
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2013-03-25 11:09 [PATCH 2/2] Btrfs: kill some BUG_ONs() in the find_parent_nodes() Wang Shilong
2013-03-25 11:47 ` Jan Schmidt
2013-03-25 12:22 ` Wang Shilong
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