knfsd: nfsd: provide export lookup wrappers which take a svc_rqst

Split the callers of exp_get_by_name(), exp_find(), and exp_parent() into
those that are processing requests and those that are doing other stuff (like
looking up filehandles for mountd).

No change in behavior, just a (fairly pointless, on its own) cleanup.

(Note this has the effect of making nfsd_cross_mnt() pass rqstp->rq_client
instead of exp->ex_client into exp_find_by_name().  However, the two should
have the same value at this point.)

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index af6abb2..9b569af 100644 (file)
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1228,6 +1228,32 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
        return exp;
 }
 
+/*
+ * 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().
+ */
+struct svc_export *
+rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
+               struct dentry *dentry)
+{
+       return exp_get_by_name(rqstp->rq_client, mnt, dentry,
+                                               &rqstp->rq_chandle);
+}
+
+struct svc_export *
+rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
+{
+       return exp_find(rqstp->rq_client, fsid_type, fsidv,
+                                               &rqstp->rq_chandle);
+}
+
+struct svc_export *
+rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,
+               struct dentry *dentry)
+{
+       return exp_parent(rqstp->rq_client, mnt, dentry, &rqstp->rq_chandle);
+}
 
 /*
  * Called when we need the filehandle for the root of the pseudofs,
@@ -1243,7 +1269,7 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
 
        mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
 
-       exp = exp_find(rqstp->rq_client, FSID_NUM, fsidv, rqstp->rq_chandle);
+       exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
        if (PTR_ERR(exp) == -ENOENT)
                return nfserr_perm;
        if (IS_ERR(exp))

diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 89f9041..180e068 100644 (file)
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -145,7 +145,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
                                fh->fh_fsid[1] = fh->fh_fsid[2];
                        }
                        if ((data_left -= len)<0) goto out;
-                       exp = exp_find(rqstp->rq_client, fh->fh_fsid_type, datap, &rqstp->rq_chandle);
+                       exp = rqst_exp_find(rqstp, fh->fh_fsid_type, datap);
                        datap += len;
                } else {
                        dev_t xdev;
@@ -156,8 +156,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
                        xdev = old_decode_dev(fh->ofh_xdev);
                        xino = u32_to_ino_t(fh->ofh_xino);
                        mk_fsid(FSID_DEV, tfh, xdev, xino, 0, NULL);
-                       exp = exp_find(rqstp->rq_client, FSID_DEV, tfh,
-                                      &rqstp->rq_chandle);
+                       exp = rqst_exp_find(rqstp, FSID_DEV, tfh);
                }
 
                error = nfserr_stale;

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index ec6aaf8..65043af 100644 (file)
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -113,7 +113,7 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
 
        while (follow_down(&mnt,&mounts)&&d_mountpoint(mounts));
 
-       exp2 = exp_get_by_name(exp->ex_client, mnt, mounts, &rqstp->rq_chandle);
+       exp2 = rqst_exp_get_by_name(rqstp, mnt, mounts);
        if (IS_ERR(exp2)) {
                err = PTR_ERR(exp2);
                dput(mounts);
@@ -188,8 +188,7 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
                        dput(dentry);
                        dentry = dp;
 
-                       exp2 = exp_parent(exp->ex_client, mnt, dentry,
-                                         &rqstp->rq_chandle);
+                       exp2 = rqst_exp_parent(rqstp, mnt, dentry);
                        if (PTR_ERR(exp2) == -ENOENT) {
                                dput(dentry);
                                dentry = dget(dparent);

diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h
index 5ed4f27..1ba53e5 100644 (file)
--- a/include/linux/nfsd/export.h
+++ b/include/linux/nfsd/export.h
@@ -129,10 +129,16 @@ struct svc_export *       exp_get_by_name(struct auth_domain *clp,
                                        struct vfsmount *mnt,
                                        struct dentry *dentry,
                                        struct cache_req *reqp);
+struct svc_export *    rqst_exp_get_by_name(struct svc_rqst *,
+                                            struct vfsmount *,
+                                            struct dentry *);
 struct svc_export *    exp_parent(struct auth_domain *clp,
                                   struct vfsmount *mnt,
                                   struct dentry *dentry,
                                   struct cache_req *reqp);
+struct svc_export *    rqst_exp_parent(struct svc_rqst *,
+                                       struct vfsmount *mnt,
+                                       struct dentry *dentry);
 int                    exp_rootfh(struct auth_domain *, 
                                        char *path, struct knfsd_fh *, int maxsize);
 __be32                 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
@@ -152,6 +158,7 @@ static inline void exp_get(struct svc_export *exp)
 extern struct svc_export *
 exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
         struct cache_req *reqp);
+struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
 
 #endif /* __KERNEL__ */