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    SubjectRe: 2.6.9 VFS Issues
    On 11/1/05, Jeff V. Merkey <jmerkey@utah-nac.org> wrote:
    >
    > I have noticed one change from 2.4 to 2.6 which although esoteric, is
    > bothersome. Did the dache assign static inode identities to
    > the "." and ".." directories for 2.6 differnt than the behavior in 2.4?
    > I notice that the root of ext based filesystems is now always "2"
    > for the root (although readdir commands pass "0" during passes through
    > the readdir function calls into the VFS). I have noticed that
    > the user space libs always fix "2" as the value of the inode for the
    > root directory. I am having trouble getting the . and .. entries to show
    > up under 2.6, although, they seem to work just fine when you type cd ..
    > and cd ., etc.
    >
    > Here's what dir.c outputs from user space for ext3 FS's:
    >
    > . type-4 len-16 ino-00000002 off-0000000C
    > .. type-4 len-16 ino-00000002 off-00000018
    > lost+found type-4 len-24 ino-0000000B off-0000002C
    > grub type-4 len-16 ino-00000FC1 off-00000038
    > initrd-2.6.5-1.358.img type-8 len-40 ino-0000001D off-00000058
    > bzImage type-8 len-24 ino-00000010 off-00000078
    > boot.b type-8 len-24 ino-00000011 off-00000088
    > chain.b type-8 len-24 ino-0000000E off-00000098
    > os2_d.b type-8 len-24 ino-0000000F off-000000A8
    > vmlinuz-2.6.9 type-8 len-32 ino-00000012 off-00000150
    > kernel.h type-8 len-24 ino-00000019 off-000001FC
    > System.map-2.6.5-1.358 type-8 len-40 ino-0000000C off-0000021C
    > config-2.6.5-1.358 type-8 len-32 ino-0000000D off-00000238
    > vmlinuz-2.6.5-1.358 type-8 len-32 ino-0000001C off-00000400
    >

    As defined in include/linux/ext3_fs.h:

    /*
    * Special inodes numbers
    */
    #define EXT3_ROOT_INO 2 /* Root inode */

    Cheers,
    Jan
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