| Message ID | 20230802164303.14109-1-pc@manguebit.com |
|---|---|
| State | New |
| Headers | show |
| Series | smb: client: fix dfs link mount against w2k8 | expand |
tentatively merged into cifs-2.6.git for-next pending testing On Wed, Aug 2, 2023 at 11:43 AM Paulo Alcantara <pc@manguebit.com> wrote: > > Customer reported that they couldn't mount their DFS link that was > seen by the client as a DFS interlink -- special form of DFS link > where its single target may point to a different DFS namespace -- and > it turned out that it was just a regular DFS link where its referral > header flags missed the StorageServers bit thus making the client > think it couldn't tree connect to target directly without requiring > further referrals. > > When the DFS link referral header flags misses the StoraServers bit > and its target doesn't respond to any referrals, then tree connect to > it. > > Fixes: a1c0d00572fc ("cifs: share dfs connections and supers") > Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> > --- > fs/smb/client/dfs.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/fs/smb/client/dfs.c b/fs/smb/client/dfs.c > index df3fd3b720da..ee772c3d9f00 100644 > --- a/fs/smb/client/dfs.c > +++ b/fs/smb/client/dfs.c > @@ -177,8 +177,12 @@ static int __dfs_mount_share(struct cifs_mount_ctx *mnt_ctx) > struct dfs_cache_tgt_list tl = DFS_CACHE_TGT_LIST_INIT(tl); > > rc = dfs_get_referral(mnt_ctx, ref_path + 1, NULL, &tl); > - if (rc) > + if (rc) { > + rc = cifs_mount_get_tcon(mnt_ctx); > + if (!rc) > + rc = cifs_is_path_remote(mnt_ctx); > break; > + } > > tit = dfs_cache_get_tgt_iterator(&tl); > if (!tit) { > -- > 2.41.0 >
diff --git a/fs/smb/client/dfs.c b/fs/smb/client/dfs.c index df3fd3b720da..ee772c3d9f00 100644 --- a/fs/smb/client/dfs.c +++ b/fs/smb/client/dfs.c @@ -177,8 +177,12 @@ static int __dfs_mount_share(struct cifs_mount_ctx *mnt_ctx) struct dfs_cache_tgt_list tl = DFS_CACHE_TGT_LIST_INIT(tl); rc = dfs_get_referral(mnt_ctx, ref_path + 1, NULL, &tl); - if (rc) + if (rc) { + rc = cifs_mount_get_tcon(mnt_ctx); + if (!rc) + rc = cifs_is_path_remote(mnt_ctx); break; + } tit = dfs_cache_get_tgt_iterator(&tl); if (!tit) {
Customer reported that they couldn't mount their DFS link that was seen by the client as a DFS interlink -- special form of DFS link where its single target may point to a different DFS namespace -- and it turned out that it was just a regular DFS link where its referral header flags missed the StorageServers bit thus making the client think it couldn't tree connect to target directly without requiring further referrals. When the DFS link referral header flags misses the StoraServers bit and its target doesn't respond to any referrals, then tree connect to it. Fixes: a1c0d00572fc ("cifs: share dfs connections and supers") Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> --- fs/smb/client/dfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)