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From: Joseph Qi <joseph.qi@linux.alibaba.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [PATCH 4/4] ocfs2: fix value of OCFS2_INVALID_SLOT
Date: Wed, 17 Jun 2020 11:26:46 +0800
Message-ID: <c10f320c-fe6e-95e0-0157-16c137c35e3b@linux.alibaba.com> (raw)
In-Reply-To: <20200616183829.87211-5-junxiao.bi@oracle.com>



On 2020/6/17 02:38, Junxiao Bi wrote:
> From ocfs2 disk layout, slot number is 16 bits, but in ocfs2 implemtation,
> slot number is 32 bits, usually this will not cause any issue, because
> slot number is converting from u16 to u32, but OCFS2_INVALID_SLOT was
> defined as -1, when an invalid slot number from disk was got, it value
> was (u16)-1, and it was converted to u32, then the following checking
> in get_local_system_inode will be always skipped.
> 
>  static struct inode **get_local_system_inode(struct ocfs2_super *osb,
>                                                int type,
>                                                u32 slot)
>  {
>  	BUG_ON(slot == OCFS2_INVALID_SLOT);
> 	...
>  }
> 
> Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>

Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
> ---
>  fs/ocfs2/ocfs2_fs.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
> index 3fc99659ed09..19137c6d087b 100644
> --- a/fs/ocfs2/ocfs2_fs.h
> +++ b/fs/ocfs2/ocfs2_fs.h
> @@ -290,7 +290,7 @@
>  #define OCFS2_MAX_SLOTS			255
>  
>  /* Slot map indicator for an empty slot */
> -#define OCFS2_INVALID_SLOT		-1
> +#define OCFS2_INVALID_SLOT		((u16)-1)
>  
>  #define OCFS2_VOL_UUID_LEN		16
>  #define OCFS2_MAX_VOL_LABEL_LEN		64
> 

  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-16 18:38 [Ocfs2-devel] [v2] ocfs2: fix nfsd over ocfs2 issues Junxiao Bi
2020-06-16 18:38 ` [Ocfs2-devel] [PATCH 1/4] ocfs2: avoid inode removed while nfsd access it Junxiao Bi
2020-06-17  3:01   ` Joseph Qi
2020-06-17 20:57     ` Andrew Morton
2020-06-17 22:56       ` Junxiao Bi
2020-06-16 18:38 ` [Ocfs2-devel] [PATCH 2/4] ocfs2: load global_inode_alloc Junxiao Bi
2020-06-17  3:03   ` Joseph Qi
2020-06-16 18:38 ` [Ocfs2-devel] [PATCH 3/4] ocfs2: fix panic on nfs server over ocfs2 Junxiao Bi
2020-06-17  3:10   ` Joseph Qi
2020-06-16 18:38 ` [Ocfs2-devel] [PATCH 4/4] ocfs2: fix value of OCFS2_INVALID_SLOT Junxiao Bi
2020-06-17  3:26   ` Joseph Qi [this message]
2020-07-02  8:48   ` Gang He
2020-07-02 14:13     ` Joseph Qi
2020-07-02 17:51       ` Junxiao Bi
2020-07-03  3:41       ` Gang He
2020-07-03  8:41         ` Gang He
2020-07-03 12:03           ` Joseph Qi
2020-07-03 13:12             ` Gang He

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