diff options
author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-08-13 17:59:07 +0300 |
---|---|---|
committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-08-17 21:05:43 +0300 |
commit | 6f536936b79bd4b5cea8fb0e5b8b0bce8cd1ea4a (patch) | |
tree | fe3006ea3e7dd028522af5aa124d7dadfd8fc0cb /fs/nfs/pnfs_nfs.c | |
parent | e9ae58aeee8842a50f7e199d602a5ccb2e41a95f (diff) | |
download | linux-6f536936b79bd4b5cea8fb0e5b8b0bce8cd1ea4a.tar.xz |
NFSv4.1/pNFS: Fix borken function _same_data_server_addrs_locked()
- Switch back to using list_for_each_entry(). Fixes an incorrect test
for list NULL termination.
- Do not assume that lists are sorted.
- Finally, consider an existing entry to match if it consists of a subset
of the addresses in the new entry.
Cc: stable@vger.kernel.org # 4.0+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs_nfs.c')
-rw-r--r-- | fs/nfs/pnfs_nfs.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c index 7a282876662f..e5c679f04099 100644 --- a/fs/nfs/pnfs_nfs.c +++ b/fs/nfs/pnfs_nfs.c @@ -359,26 +359,31 @@ same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2) return false; } +/* + * Checks if 'dsaddrs1' contains a subset of 'dsaddrs2'. If it does, + * declare a match. + */ static bool _same_data_server_addrs_locked(const struct list_head *dsaddrs1, const struct list_head *dsaddrs2) { struct nfs4_pnfs_ds_addr *da1, *da2; - - /* step through both lists, comparing as we go */ - for (da1 = list_first_entry(dsaddrs1, typeof(*da1), da_node), - da2 = list_first_entry(dsaddrs2, typeof(*da2), da_node); - da1 != NULL && da2 != NULL; - da1 = list_entry(da1->da_node.next, typeof(*da1), da_node), - da2 = list_entry(da2->da_node.next, typeof(*da2), da_node)) { - if (!same_sockaddr((struct sockaddr *)&da1->da_addr, - (struct sockaddr *)&da2->da_addr)) - return false; + struct sockaddr *sa1, *sa2; + bool match = false; + + list_for_each_entry(da1, dsaddrs1, da_node) { + sa1 = (struct sockaddr *)&da1->da_addr; + match = false; + list_for_each_entry(da2, dsaddrs2, da_node) { + sa2 = (struct sockaddr *)&da2->da_addr; + match = same_sockaddr(sa1, sa2); + if (match) + break; + } + if (!match) + break; } - if (da1 == NULL && da2 == NULL) - return true; - - return false; + return match; } /* |