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| author | Paulo Alcantara <pc@cjr.nz> | 2021-06-14 12:58:20 -0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-06-20 21:28:17 -0500 |
| commit | 889c2a700799f3b6f82210925e1faf4a9b833c4a (patch) | |
| tree | 18e5679e56ea0d91d1cb216fa31abb4a704c7fc4 /fs/cifs/dfs_cache.c | |
| parent | 0475c3655e6ebd1d6d6f0e705eba97fce39a08e3 (diff) | |
| download | lwn-889c2a700799f3b6f82210925e1faf4a9b833c4a.tar.gz lwn-889c2a700799f3b6f82210925e1faf4a9b833c4a.zip | |
cifs: fix check of dfs interlinks
Interlink is a special type of DFS link that resolves to a different
DFS domain-based namespace. To determine whether it is an interlink
or not, check if ReferralServers and StorageServers bits are set to 1
and 0 respectively in ReferralHeaderFlags, as specified in MS-DFSC
3.1.5.4.5 Determining Whether a Referral Response is an Interlink.
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/dfs_cache.c')
| -rw-r--r-- | fs/cifs/dfs_cache.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c index 775dbc7b0d7a..7c1769714609 100644 --- a/fs/cifs/dfs_cache.c +++ b/fs/cifs/dfs_cache.c @@ -26,8 +26,7 @@ #define CACHE_MAX_ENTRIES 64 #define CACHE_MIN_TTL 120 /* 2 minutes */ -#define IS_INTERLINK_SET(v) ((v) & (DFSREF_REFERRAL_SERVER | \ - DFSREF_STORAGE_SERVER)) +#define IS_DFS_INTERLINK(v) (((v) & DFSREF_REFERRAL_SERVER) && !((v) & DFSREF_STORAGE_SERVER)) struct cache_dfs_tgt { char *name; @@ -284,7 +283,7 @@ static int dfscache_proc_show(struct seq_file *m, void *v) "cache entry: path=%s,type=%s,ttl=%d,etime=%ld,hdr_flags=0x%x,ref_flags=0x%x,interlink=%s,path_consumed=%d,expired=%s\n", ce->path, ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl, ce->etime.tv_nsec, ce->ref_flags, ce->hdr_flags, - IS_INTERLINK_SET(ce->hdr_flags) ? "yes" : "no", + IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no", ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no"); list_for_each_entry(t, &ce->tlist, list) { @@ -353,7 +352,7 @@ static inline void dump_ce(const struct cache_entry *ce) ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl, ce->etime.tv_nsec, ce->hdr_flags, ce->ref_flags, - IS_INTERLINK_SET(ce->hdr_flags) ? "yes" : "no", + IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no", ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no"); dump_tgts(ce); |