linux-kernel - Re: [PATCH] ext4:fix unexpected error from ext4_reserve

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Message-ID: <46777224.60201@clusterfs.com>
Date:	Tue, 19 Jun 2007 10:05:24 +0400
From:	Alex Tomas <alex@...sterfs.com>
To:	cmm@...ibm.com
CC:	Dmitriy Monakhov <dmonakhov@...nvz.org>,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4:fix unexpected error from ext4_reserve_global

ACK, of course.

thanks, Alex

Mingming Cao wrote:
> On Thu, 2007-06-14 at 19:29 +0400, Dmitriy Monakhov wrote:
>> I just cant belive my eyes then i saw this at the first time...
>> simple test: strace dd if=/dev/zero of=/mnt/file
>>
> Thanks for reporting it. 
> 
>> open("/dev/zero", O_RDONLY)             = 0
>> close(1)                                = 0
>> open("/mnt/test/file", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 1
>> read(0, "\0\0\0\0\0\0\0\0\0"..., 512) = 512
>> write(1, "\0\0\0\0\0\0\0\0"..., 512) = 512
>> read(0, "\0\0\0\0\0\0\0\0\0"..., 512) = 512
>> write(1, "\0\0\0\0\0\0\0\0"..., 512) = -1 ENOENT (No such fil
>> e or directory)
>>
>> This strange error returned from ext4_reserve_global().
>> It's just typo because:
>> a) In fact this is 100% ENOSPC situation
>> b) simular function ext4_reserve_local() returns -ENOSPC
>>
> I agree.
> 
> Patch is put in ext4 patch queue. Alex if you can Ack, that would be
> great.
> 
> 
> Thanks,
> 
> Mingming
>> Signed-off-by: Dmitriy Monakhov <dmonakhov@...nvz.org>
>> ---
>>  fs/ext4/balloc.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
>> index 4d7bfd2..43ae8f8 100644
>> --- a/fs/ext4/balloc.c
>> +++ b/fs/ext4/balloc.c
>> @@ -1920,7 +1920,7 @@ int ext4_reserve_global(struct super_block *sb, int blocks)
>>  {
>>  	struct ext4_sb_info *sbi = EXT4_SB(sb);
>>  	struct ext4_reservation_slot *rs;
>> -	int i, rc = -ENOENT;
>> +	int i, rc = -ENOSPC;
>>  	__u64 free = 0;
>>
>>  	rs = sbi->s_reservation_slots;
> 
> -
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