Hi,
On Jan 17, 2008 9:22 PM, Mayuresh <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I want to use 'l_i_reserved2' field of ext2_inode for my purpose. I
> need to initialise this field when a new inode is created. I traced
> sys_create call and found that 'alloc_inode' from 'struct
> super_operations' is called for new inode[correct me here]. But looks
> like there is no way one can access raw inode[ext2_inode] from
> alloc_inode.
>
> Is it possible to initialise 'l_i_reserved2' in alloc_inode ? What
> could be other way to do it ?
>
ext2_inode_info is the data structure of memory inode, while ext2_inode
is the data structure of disk inode. You should differentiate them.
ext2_alloc_inode is for allocating the first type of inode, whereas
ext2_get_inode may be for allocating the second type of inode.
>
> static struct inode *ext2_alloc_inode(struct super_block *sb)
> {
> struct ext2_inode_info *ei;
> ei = (struct ext2_inode_info *)kmem_cache_alloc(ext2_inode_cachep,
> GFP_KERNEL);
> if (!ei)
> return NULL;
> #ifdef CONFIG_EXT2_FS_POSIX_ACL
> ei->i_acl = EXT2_ACL_NOT_CACHED;
> ei->i_default_acl = EXT2_ACL_NOT_CACHED;
> #endif
> ei->vfs_inode.i_version = 1;
> }
>
> LXR link for ext2_alloc_inode:
> http://lxr.linux.no/linux/fs/ext2/super.c#L141
>
> Thanks.
>
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>
--
National Research Center for Intelligent Computing Systems
Institute of Computing Technology, Chinese Academy of Sciences
