- void ext2_read_inode (struct inode * inode)
- {
- struct ext2_inode_info *ei = EXT2_I(inode);
- ino_t ino = inode->i_ino;
- struct buffer_head * bh;
- struct ext2_inode * raw_inode = ext2_get_inode(inode->i_sb, ino, &bh);
- int n;
On Jan 21, 2008 1:14 PM, Wang Yu <wangyuict@xxxxxxxxx> wrote:
Hi,
raw_inode? what do you point to? I can not find it in structure inode of 2.6.20.
Regards!On Jan 21, 2008 2:31 PM, Mayuresh < infinite.questions@xxxxxxxxx> wrote: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 <wangyuict@xxxxxxxxx> wrote:Hi,On Jan 17, 2008 9:22 PM, Mayuresh <infinite.questions@xxxxxxxxx> 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
--
National Research Center for Intelligent Computing Systems
Institute of Computing Technology, Chinese Academy of Sciences
