Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2ea2209f073dc7049bd285b4f5dbc0aa273f9746
Commit:     2ea2209f073dc7049bd285b4f5dbc0aa273f9746
Parent:     3ab4d8b1215d61736e2a9a26bea7cc2e6b029e3d
Author:     J. Bruce Fields <[EMAIL PROTECTED]>
AuthorDate: Tue Jul 17 04:04:46 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Jul 17 10:23:08 2007 -0700

    knfsd: nfsd: use ip-address-based domain in secinfo case
    
    With this patch, we fall back on using the gss/pseudoflavor only if we fail 
to
    find a matching auth_unix export that has a secinfo list.
    
    As long as sec= options aren't used, there's still no change in behavior 
here
    (except possibly for some additional auth_unix cache lookups, whose results
    will be ignored).
    
    The sec= option, however, is not actually enforced yet; later patches will 
add
    the necessary checks.
    
    Signed-off-by: "J. Bruce Fields" <[EMAIL PROTECTED]>
    Signed-off-by: Neil Brown <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 fs/nfsd/export.c |   76 +++++++++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 67 insertions(+), 9 deletions(-)

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index ac225a7..4537a8f 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1229,6 +1229,10 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 
*fsidv,
 }
 
 /*
+ * Uses rq_client and rq_gssclient to find an export; uses rq_client (an
+ * auth_unix client) if it's available and has secinfo information;
+ * otherwise, will try to use rq_gssclient.
+ *
  * Called from functions that handle requests; functions that do work on
  * behalf of mountd are passed a single client name to use, and should
  * use exp_get_by_name() or exp_find().
@@ -1237,29 +1241,83 @@ struct svc_export *
 rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
                struct dentry *dentry)
 {
-       struct auth_domain *clp;
+       struct svc_export *gssexp, *exp = NULL;
+
+       if (rqstp->rq_client == NULL)
+               goto gss;
 
-       clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;
-       return exp_get_by_name(clp, mnt, dentry, &rqstp->rq_chandle);
+       /* First try the auth_unix client: */
+       exp = exp_get_by_name(rqstp->rq_client, mnt, dentry,
+                                               &rqstp->rq_chandle);
+       if (PTR_ERR(exp) == -ENOENT)
+               goto gss;
+       if (IS_ERR(exp))
+               return exp;
+       /* If it has secinfo, assume there are no gss/... clients */
+       if (exp->ex_nflavors > 0)
+               return exp;
+gss:
+       /* Otherwise, try falling back on gss client */
+       if (rqstp->rq_gssclient == NULL)
+               return exp;
+       gssexp = exp_get_by_name(rqstp->rq_gssclient, mnt, dentry,
+                                               &rqstp->rq_chandle);
+       if (PTR_ERR(gssexp) == -ENOENT)
+               return exp;
+       if (exp && !IS_ERR(exp))
+               exp_put(exp);
+       return gssexp;
 }
 
 struct svc_export *
 rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
 {
-       struct auth_domain *clp;
+       struct svc_export *gssexp, *exp = NULL;
+
+       if (rqstp->rq_client == NULL)
+               goto gss;
 
-       clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;
-       return exp_find(clp, fsid_type, fsidv, &rqstp->rq_chandle);
+       /* First try the auth_unix client: */
+       exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle);
+       if (PTR_ERR(exp) == -ENOENT)
+               goto gss;
+       if (IS_ERR(exp))
+               return exp;
+       /* If it has secinfo, assume there are no gss/... clients */
+       if (exp->ex_nflavors > 0)
+               return exp;
+gss:
+       /* Otherwise, try falling back on gss client */
+       if (rqstp->rq_gssclient == NULL)
+               return exp;
+       gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv,
+                                               &rqstp->rq_chandle);
+       if (PTR_ERR(gssexp) == -ENOENT)
+               return exp;
+       if (exp && !IS_ERR(exp))
+               exp_put(exp);
+       return gssexp;
 }
 
 struct svc_export *
 rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,
                struct dentry *dentry)
 {
-       struct auth_domain *clp;
+       struct svc_export *exp;
 
-       clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;
-       return exp_parent(rqstp->rq_client, mnt, dentry, &rqstp->rq_chandle);
+       dget(dentry);
+       exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
+
+       while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
+               struct dentry *parent;
+
+               parent = dget_parent(dentry);
+               dput(dentry);
+               dentry = parent;
+               exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
+       }
+       dput(dentry);
+       return exp;
 }
 
 /*
-
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