Thanks for reply Wang. I appreciate your reply to rather unexplored
question.
Looks like ext2_inode_info[and hence vfs inode] is only allocated in
alloc_inode[as name suggests]; it is not filled with fields of raw_inode.
Filling vfs inode is done in read_inode where I have a pointer to raw_inode.
On Jan 18, 2008 9:20 AM, Wang Yu <[EMAIL PROTECTED]> wrote:
> 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
