Re: UBIFS file-system corruption (missing inode) after power-cut on 4.14.96

[Richard Weinberger <richard@xxxxxxxxxxxxx>]

Am Freitag, 29. März 2019, 10:43:33 CEST schrieb Lars Persson:
> On Thu, Mar 28, 2019 at 6:31 PM Richard Weinberger
> <richard.weinberger@xxxxxxxxx> wrote:
> >
> > Can you please share me your corrupted fs?
> > I'm not so sure what is really the root cause.
> > The thing is, ubifs_delete_orphan() does not need to tigger a commit.
> > Ff something depends on a commit, we have another problem, I fear.
> >
> 
> Thanks. The download link for the file-system was shared to your gmail address.

Can you please run your tests again with this patch applied?
It needs further optimization, but we are on the right track.

diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index 2f1618f300fb..c15e484f73a4 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -691,8 +691,21 @@ static int do_kill_orphans(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
 		n = (le32_to_cpu(orph->ch.len) - UBIFS_ORPH_NODE_SZ) >> 3;
 		for (i = 0; i < n; i++) {
 			union ubifs_key key1, key2;
+			struct ubifs_ino_node *ino;
+
+			ino = kmalloc(UBIFS_MAX_INO_NODE_SZ, GFP_NOFS);
+			if (!ino)
+				return -ENOMEM;
 
 			inum = le64_to_cpu(orph->inos[i]);
+			ino_key_init(c, &key1, inum);
+			err = ubifs_tnc_lookup(c, &key1, ino);
+			if (!err && ino->nlink) {
+				kfree(ino);
+				continue;
+			}
+			kfree(ino);
+
 			dbg_rcvry("deleting orphaned inode %lu",
 				  (unsigned long)inum);
 
Thanks,
//richard



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