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Fix dot-lookup when readdir does not provide inodes

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Some filesystems do not provide inode numbers through readdir (FUSE mounts
without -o use_ino). We therefore have to lookup each directory entry to
get the missing numbers.

dot and double-dot are exceptions, as we already know the values. Moreover,
the lookup code does not expect to get requests for dot and will abort
perfused(8) when it gets some. In order to fix that, we just check for
dot and double-dot special case and use the known values instead of sending
a lookup.
This commit is contained in:
manu 2015-06-03 14:07:05 +00:00
parent 9322d6a704
commit 4c4ecb7844
1 changed files with 12 additions and 8 deletions
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20
lib/libperfuse/ops.c
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@ -1,4 +1,4 @@
/* $NetBSD: ops.c,v 1.83 2015/02/15 20:21:29 manu Exp $ */
/* $NetBSD: ops.c,v 1.84 2015/06/03 14:07:05 manu Exp $ */
/*-
* Copyright (c) 2010-2011 Emmanuel Dreyfus. All rights reserved.
@ -651,13 +651,17 @@ fuse_to_dirent(struct puffs_usermount *pu, puffs_cookie_t opc,
struct puffs_node *pn;
struct perfuse_node_data *pnd = PERFUSE_NODE_DATA(opc);
/*
* Avoid breaking out of fs
* by lookup to .. on root
*/
if ((strcmp(name, "..") == 0) &&
(pnd->pnd_nodeid == FUSE_ROOT_ID)) {
fd->ino = FUSE_ROOT_ID;
if (strcmp(name, "..") == 0) {
/*
* Avoid breaking out of fs
* by lookup to .. on root
*/
if (pnd->pnd_nodeid == FUSE_ROOT_ID)
fd->ino = FUSE_ROOT_ID;
else
fd->ino = pnd->pnd_parent_nodeid;
} else if (strcmp(name, ".") == 0 ) {
fd->ino = pnd->pnd_nodeid;
} else {
int error;