From: Namjae Jeon <[email protected]>

All the files on a FAT partition have an on-disk directory entry.
The location of these entries, i_pos, is unique and is constructed by the
fat_make_i_pos() function.We can use this as the inode number making it
peristent across remounts.

Signed-off-by: Namjae Jeon <[email protected]>
Signed-off-by: Ravishankar N <[email protected]>
Signed-off-by: Amit Sahrawat <[email protected]>
---
 fs/fat/inode.c      |    2 +-
 fs/fat/namei_vfat.c |    1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 973296b..cf111a0 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -458,7 +458,7 @@ struct inode *fat_build_inode(struct super_block *sb,
                inode = ERR_PTR(-ENOMEM);
                goto out;
        }
-       inode->i_ino = iunique(sb, MSDOS_ROOT_INO);
+       inode->i_ino = i_pos;
        inode->i_version = 1;
        err = fat_fill_inode(inode, de);
        if (err) {
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index e535dd7..ffb4814 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -954,6 +954,7 @@ static int vfat_rename(struct inode *old_dir, struct dentry 
*old_dentry,
        new_dir->i_version++;
 
        fat_detach(old_inode);
+       old_inode->i_ino = new_i_pos;
        fat_attach(old_inode, new_i_pos);
        if (IS_DIRSYNC(new_dir)) {
                err = fat_sync_inode(old_inode);
-- 
1.7.9.5

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