[PATCH v3 2/5] fat: allocate persistent inode numbers

[Namjae Jeon]

From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>

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 persistent across remounts.

Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Ravishankar N <ravi.n1@xxxxxxxxxxx>
Signed-off-by: Amit Sahrawat <a.sahrawat@xxxxxxxxxxx>
---
 fs/fat/inode.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 2689ef5..c3dad9b 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -458,7 +458,10 @@ struct inode *fat_build_inode(struct super_block *sb,
 		inode = ERR_PTR(-ENOMEM);
 		goto out;
 	}
-	inode->i_ino = iunique(sb, MSDOS_ROOT_INO);
+	if (MSDOS_SB(sb)->options.nfs == FAT_NFS_LIMITED)
+		inode->i_ino = i_pos;
+	else
+		inode->i_ino = iunique(sb, MSDOS_ROOT_INO);
 	inode->i_version = 1;
 	err = fat_fill_inode(inode, de);
 	if (err) {
-- 
1.7.9.5

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