[DLM] block dlm_recv in recovery transition

[safe/jmp/linux-2.6] / fs / nfsd / export.c

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 4537a8f..cba899a 100644 (file)
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -564,9 +564,10 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 
        /* flags */
        err = get_int(&mesg, &an_int);
-       if (err == -ENOENT)
+       if (err == -ENOENT) {
+               err = 0;
                set_bit(CACHE_NEGATIVE, &exp.h.flags);
-       else {
+       } else {
                if (err || an_int < 0) goto out;        
                exp.ex_flags= an_int;
        
@@ -641,6 +642,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 
 static void exp_flags(struct seq_file *m, int flag, int fsid,
                uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs);
+static void show_secinfo(struct seq_file *m, struct svc_export *exp);
 
 static int svc_export_show(struct seq_file *m,
                           struct cache_detail *cd,
@@ -670,6 +672,7 @@ static int svc_export_show(struct seq_file *m,
                                seq_printf(m, "%02x", exp->ex_uuid[i]);
                        }
                }
+               show_secinfo(m, exp);
        }
        seq_puts(m, ")\n");
        return 0;
@@ -1228,6 +1231,28 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
        return exp;
 }
 
+__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp)
+{
+       struct exp_flavor_info *f;
+       struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+
+       /* legacy gss-only clients are always OK: */
+       if (exp->ex_client == rqstp->rq_gssclient)
+               return 0;
+       /* ip-address based client; check sec= export option: */
+       for (f = exp->ex_flavors; f < end; f++) {
+               if (f->pseudoflavor == rqstp->rq_flavor)
+                       return 0;
+       }
+       /* defaults in absence of sec= options: */
+       if (exp->ex_nflavors == 0) {
+               if (rqstp->rq_flavor == RPC_AUTH_NULL ||
+                   rqstp->rq_flavor == RPC_AUTH_UNIX)
+                       return 0;
+       }
+       return nfserr_wrongsec;
+}
+
 /*
  * 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;
@@ -1241,7 +1266,7 @@ struct svc_export *
 rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
                struct dentry *dentry)
 {
-       struct svc_export *gssexp, *exp = NULL;
+       struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
 
        if (rqstp->rq_client == NULL)
                goto gss;
@@ -1264,7 +1289,7 @@ gss:
                                                &rqstp->rq_chandle);
        if (PTR_ERR(gssexp) == -ENOENT)
                return exp;
-       if (exp && !IS_ERR(exp))
+       if (!IS_ERR(exp))
                exp_put(exp);
        return gssexp;
 }
@@ -1272,7 +1297,7 @@ gss:
 struct svc_export *
 rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
 {
-       struct svc_export *gssexp, *exp = NULL;
+       struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
 
        if (rqstp->rq_client == NULL)
                goto gss;
@@ -1294,7 +1319,7 @@ gss:
                                                &rqstp->rq_chandle);
        if (PTR_ERR(gssexp) == -ENOENT)
                return exp;
-       if (exp && !IS_ERR(exp))
+       if (!IS_ERR(exp))
                exp_put(exp);
        return gssexp;
 }
@@ -1340,6 +1365,10 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
        if (IS_ERR(exp))
                return nfserrno(PTR_ERR(exp));
        rv = fh_compose(fhp, exp, exp->ex_dentry, NULL);
+       if (rv)
+               goto out;
+       rv = check_nfsd_access(exp, rqstp);
+out:
        exp_put(exp);
        return rv;
 }
@@ -1427,28 +1456,62 @@ static struct flags {
        { 0, {"", ""}}
 };
 
-static void exp_flags(struct seq_file *m, int flag, int fsid,
-               uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
+static void show_expflags(struct seq_file *m, int flags, int mask)
 {
-       int first = 0;
        struct flags *flg;
+       int state, first = 0;
 
        for (flg = expflags; flg->flag; flg++) {
-               int state = (flg->flag & flag)?0:1;
+               if (flg->flag & ~mask)
+                       continue;
+               state = (flg->flag & flags) ? 0 : 1;
                if (*flg->name[state])
                        seq_printf(m, "%s%s", first++?",":"", flg->name[state]);
        }
+}
+
+static void show_secinfo_flags(struct seq_file *m, int flags)
+{
+       seq_printf(m, ",");
+       show_expflags(m, flags, NFSEXP_SECINFO_FLAGS);
+}
+
+static void show_secinfo(struct seq_file *m, struct svc_export *exp)
+{
+       struct exp_flavor_info *f;
+       struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+       int lastflags = 0, first = 0;
+
+       if (exp->ex_nflavors == 0)
+               return;
+       for (f = exp->ex_flavors; f < end; f++) {
+               if (first || f->flags != lastflags) {
+                       if (!first)
+                               show_secinfo_flags(m, lastflags);
+                       seq_printf(m, ",sec=%d", f->pseudoflavor);
+                       lastflags = f->flags;
+               } else {
+                       seq_printf(m, ":%d", f->pseudoflavor);
+               }
+       }
+       show_secinfo_flags(m, lastflags);
+}
+
+static void exp_flags(struct seq_file *m, int flag, int fsid,
+               uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
+{
+       show_expflags(m, flag, NFSEXP_ALLFLAGS);
        if (flag & NFSEXP_FSID)
-               seq_printf(m, "%sfsid=%d", first++?",":"", fsid);
+               seq_printf(m, ",fsid=%d", fsid);
        if (anonu != (uid_t)-2 && anonu != (0x10000-2))
-               seq_printf(m, "%sanonuid=%d", first++?",":"", anonu);
+               seq_printf(m, ",anonuid=%u", anonu);
        if (anong != (gid_t)-2 && anong != (0x10000-2))
-               seq_printf(m, "%sanongid=%d", first++?",":"", anong);
+               seq_printf(m, ",anongid=%u", anong);
        if (fsloc && fsloc->locations_count > 0) {
                char *loctype = (fsloc->migrated) ? "refer" : "replicas";
                int i;
 
-               seq_printf(m, "%s%s=", first++?",":"", loctype);
+               seq_printf(m, ",%s=", loctype);
                seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\");
                seq_putc(m, '@');
                seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\");