* [PATCH 1/2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist()
@ 2018-05-30 2:07 Su Yue
2018-05-30 2:55 ` Su Yue
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Su Yue @ 2018-05-30 2:07 UTC (permalink / raw)
To: linux-btrfs; +Cc: suy.fnst
Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
---
fs/btrfs/extent-tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 44093f92a532..99df6199dffc 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3311,7 +3311,7 @@ int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset,
path = btrfs_alloc_path();
if (!path)
- return -ENOENT;
+ return -ENOMEM;
do {
ret = check_committed_ref(root, path, objectid,
--
2.17.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 1/2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist()
2018-05-30 2:07 [PATCH 1/2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist() Su Yue
@ 2018-05-30 2:55 ` Su Yue
2018-05-30 6:24 ` Nikolay Borisov
2018-05-30 6:49 ` [PATCH v2] " Su Yue
2 siblings, 0 replies; 7+ messages in thread
From: Su Yue @ 2018-05-30 2:55 UTC (permalink / raw)
To: linux-btrfs
[-- Attachment #1: Type: text/plain, Size: 708 bytes --]
Sorry, the [PATCH 2/2] is abandoned. So the subject should be [PATCH].
On 05/30/2018 10:07 AM, Su Yue wrote:
> Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
> ---
> fs/btrfs/extent-tree.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
> index 44093f92a532..99df6199dffc 100644
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -3311,7 +3311,7 @@ int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset,
>
> path = btrfs_alloc_path();
> if (!path)
> - return -ENOENT;
> + return -ENOMEM;
>
> do {
> ret = check_committed_ref(root, path, objectid,
>
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 1/2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist()
2018-05-30 2:07 [PATCH 1/2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist() Su Yue
2018-05-30 2:55 ` Su Yue
@ 2018-05-30 6:24 ` Nikolay Borisov
2018-05-30 6:49 ` [PATCH v2] " Su Yue
2 siblings, 0 replies; 7+ messages in thread
From: Nikolay Borisov @ 2018-05-30 6:24 UTC (permalink / raw)
To: Su Yue, linux-btrfs
On 30.05.2018 05:07, Su Yue wrote:
> Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Generally we discourage commit log messages. I understand this patch is
very obvious but put a sentence saying that btrfs_alloc_path can fail
due to enomem hence returning enomem is the right ting to do here.
> ---
> fs/btrfs/extent-tree.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
> index 44093f92a532..99df6199dffc 100644
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -3311,7 +3311,7 @@ int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset,
>
> path = btrfs_alloc_path();
> if (!path)
> - return -ENOENT;
> + return -ENOMEM;
>
> do {
> ret = check_committed_ref(root, path, objectid,
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist()
2018-05-30 6:49 ` [PATCH v2] " Su Yue
@ 2018-05-30 6:44 ` Nikolay Borisov
2018-05-30 15:33 ` David Sterba
1 sibling, 0 replies; 7+ messages in thread
From: Nikolay Borisov @ 2018-05-30 6:44 UTC (permalink / raw)
To: Su Yue, linux-btrfs
On 30.05.2018 09:49, Su Yue wrote:
> btrfs_alloc_path() may fail due to no enough memory,
> so let the function return -ENOMEM instead of -ENOENT is better.
>
> Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
> ---
> Changelog:
> v2:
> Add commit message to describe the patch. Thanks Nikolay.
>
> fs/btrfs/extent-tree.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
> index 44093f92a532..99df6199dffc 100644
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -3311,7 +3311,7 @@ int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset,
>
> path = btrfs_alloc_path();
> if (!path)
> - return -ENOENT;
> + return -ENOMEM;
>
> do {
> ret = check_committed_ref(root, path, objectid,
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH v2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist()
2018-05-30 2:07 [PATCH 1/2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist() Su Yue
2018-05-30 2:55 ` Su Yue
2018-05-30 6:24 ` Nikolay Borisov
@ 2018-05-30 6:49 ` Su Yue
2018-05-30 6:44 ` Nikolay Borisov
2018-05-30 15:33 ` David Sterba
2 siblings, 2 replies; 7+ messages in thread
From: Su Yue @ 2018-05-30 6:49 UTC (permalink / raw)
To: linux-btrfs; +Cc: suy.fnst
btrfs_alloc_path() may fail due to no enough memory,
so let the function return -ENOMEM instead of -ENOENT is better.
Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
---
Changelog:
v2:
Add commit message to describe the patch. Thanks Nikolay.
fs/btrfs/extent-tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 44093f92a532..99df6199dffc 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3311,7 +3311,7 @@ int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset,
path = btrfs_alloc_path();
if (!path)
- return -ENOENT;
+ return -ENOMEM;
do {
ret = check_committed_ref(root, path, objectid,
--
2.17.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH v2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist()
2018-05-30 6:49 ` [PATCH v2] " Su Yue
2018-05-30 6:44 ` Nikolay Borisov
@ 2018-05-30 15:33 ` David Sterba
2018-05-31 2:08 ` Su Yue
1 sibling, 1 reply; 7+ messages in thread
From: David Sterba @ 2018-05-30 15:33 UTC (permalink / raw)
To: Su Yue; +Cc: linux-btrfs
On Wed, May 30, 2018 at 02:49:10PM +0800, Su Yue wrote:
> btrfs_alloc_path() may fail due to no enough memory,
> so let the function return -ENOMEM instead of -ENOENT is better.
>
> Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Thanks. I've audited all return codes after failed path allocation, this
was the only one not matching.
The return code of btrfs_cross_ref_exist should be also distinguished at
the call sites, as both places expect only the ENOENT but should not
react to ENOMEM as if it were ENOENT.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist()
2018-05-30 15:33 ` David Sterba
@ 2018-05-31 2:08 ` Su Yue
0 siblings, 0 replies; 7+ messages in thread
From: Su Yue @ 2018-05-31 2:08 UTC (permalink / raw)
To: dsterba, linux-btrfs
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On 05/30/2018 11:33 PM, David Sterba wrote:
> On Wed, May 30, 2018 at 02:49:10PM +0800, Su Yue wrote:
>> btrfs_alloc_path() may fail due to no enough memory,
>> so let the function return -ENOMEM instead of -ENOENT is better.
>>
>> Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
>
> Reviewed-by: David Sterba <dsterba@suse.com>
>
> Thanks. I've audited all return codes after failed path allocation, this
> was the only one not matching.
>
> The return code of btrfs_cross_ref_exist should be also distinguished at
> the call sites, as both places expect only the ENOENT but should not
> react to ENOMEM as if it were ENOENT.
>
Not quite understand the last paragraph. Is necessary to send patches to
make the two callers to distinguish ENOMEM and ENOENT?
Thanks,
Su
>
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^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2018-05-31 2:02 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-05-30 2:07 [PATCH 1/2] btrfs: returns -ENOMEM if path allocation failed in btrfs_cross_ref_exist() Su Yue
2018-05-30 2:55 ` Su Yue
2018-05-30 6:24 ` Nikolay Borisov
2018-05-30 6:49 ` [PATCH v2] " Su Yue
2018-05-30 6:44 ` Nikolay Borisov
2018-05-30 15:33 ` David Sterba
2018-05-31 2:08 ` Su Yue
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