From 473cb365c929d060b0d198c4adff4704dec510e5 Mon Sep 17 00:00:00 2001 From: rmacklem Date: Mon, 14 Dec 2015 22:43:43 +0000 Subject: [PATCH] MFC: r291534 Add support for the "-manage-gids" option to the nfsuserd daemon. When this option is set, the NFS server uses the list of groups acquired via getgrouplist(3) for the uid instead of the list of groups in the RPC request. This can be used to avoid the 16 gid limit for the group list in the RPC request. Relnotes: yes --- usr.sbin/nfsuserd/nfsuserd.c | 60 ++++++++++++++++++++++++++++++------ 1 file changed, 51 insertions(+), 9 deletions(-) diff --git a/usr.sbin/nfsuserd/nfsuserd.c b/usr.sbin/nfsuserd/nfsuserd.c index 35e2849eae8f..293da7115a50 100644 --- a/usr.sbin/nfsuserd/nfsuserd.c +++ b/usr.sbin/nfsuserd/nfsuserd.c @@ -92,7 +92,7 @@ uid_t defaultuid = (uid_t)32767; u_char *defaultgroup = "nogroup"; gid_t defaultgid = (gid_t)32767; int verbose = 0, im_a_slave = 0, nfsuserdcnt = -1, forcestart = 0; -int defusertimeout = DEFUSERTIMEOUT; +int defusertimeout = DEFUSERTIMEOUT, manage_gids = 0; pid_t slaves[MAXNFSUSERD]; int @@ -110,6 +110,8 @@ main(int argc, char *argv[]) char hostname[MAXHOSTNAMELEN + 1], *cp; struct addrinfo *aip, hints; static uid_t check_dups[MAXUSERMAX]; + gid_t grps[NGROUPS]; + int ngroup; if (modfind("nfscommon") < 0) { /* Not present in kernel, try loading it */ @@ -160,6 +162,8 @@ main(int argc, char *argv[]) verbose = 1; } else if (!strcmp(*argv, "-force")) { forcestart = 1; + } else if (!strcmp(*argv, "-manage-gids")) { + manage_gids = 1; } else if (!strcmp(*argv, "-usermax")) { if (argc == 1) usage(); @@ -297,12 +301,14 @@ main(int argc, char *argv[]) nid.nid_gid = defaultgid; nid.nid_name = dnsname; nid.nid_namelen = strlen(nid.nid_name); + nid.nid_ngroup = 0; + nid.nid_grps = NULL; nid.nid_flag = NFSID_INITIALIZE; #ifdef DEBUG printf("Initialize uid=%d gid=%d dns=%s\n", nid.nid_uid, nid.nid_gid, nid.nid_name); #else - error = nfssvc(NFSSVC_IDNAME, &nid); + error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); if (error) errx(1, "Can't initialize nfs user/groups"); #endif @@ -316,11 +322,13 @@ main(int argc, char *argv[]) nid.nid_gid = grp->gr_gid; nid.nid_name = grp->gr_name; nid.nid_namelen = strlen(grp->gr_name); + nid.nid_ngroup = 0; + nid.nid_grps = NULL; nid.nid_flag = NFSID_ADDGID; #ifdef DEBUG printf("add gid=%d name=%s\n", nid.nid_gid, nid.nid_name); #else - error = nfssvc(NFSSVC_IDNAME, &nid); + error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); if (error) errx(1, "Can't add group %s", grp->gr_name); #endif @@ -352,11 +360,23 @@ main(int argc, char *argv[]) nid.nid_uid = pwd->pw_uid; nid.nid_name = pwd->pw_name; nid.nid_namelen = strlen(pwd->pw_name); + if (manage_gids != 0) { + /* Get the group list for this user. */ + ngroup = NGROUPS; + if (getgrouplist(pwd->pw_name, pwd->pw_gid, grps, + &ngroup) < 0) + syslog(LOG_ERR, "Group list too small"); + nid.nid_ngroup = ngroup; + nid.nid_grps = grps; + } else { + nid.nid_ngroup = 0; + nid.nid_grps = NULL; + } nid.nid_flag = NFSID_ADDUID; #ifdef DEBUG printf("add uid=%d name=%s\n", nid.nid_uid, nid.nid_name); #else - error = nfssvc(NFSSVC_IDNAME, &nid); + error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); if (error) errx(1, "Can't add user %s", pwd->pw_name); #endif @@ -439,6 +459,8 @@ nfsuserdsrv(struct svc_req *rqstp, SVCXPRT *transp) struct info info; struct nfsd_idargs nid; u_int32_t saddr; + gid_t grps[NGROUPS]; + int ngroup; /* * Only handle requests from 127.0.0.1 on a reserved port number. @@ -472,14 +494,28 @@ nfsuserdsrv(struct svc_req *rqstp, SVCXPRT *transp) nid.nid_usertimeout = defusertimeout; nid.nid_uid = pwd->pw_uid; nid.nid_name = pwd->pw_name; + if (manage_gids != 0) { + /* Get the group list for this user. */ + ngroup = NGROUPS; + if (getgrouplist(pwd->pw_name, pwd->pw_gid, + grps, &ngroup) < 0) + syslog(LOG_ERR, "Group list too small"); + nid.nid_ngroup = ngroup; + nid.nid_grps = grps; + } else { + nid.nid_ngroup = 0; + nid.nid_grps = NULL; + } } else { nid.nid_usertimeout = 5; nid.nid_uid = (uid_t)info.id; nid.nid_name = defaultuser; + nid.nid_ngroup = 0; + nid.nid_grps = NULL; } nid.nid_namelen = strlen(nid.nid_name); nid.nid_flag = NFSID_ADDUID; - error = nfssvc(NFSSVC_IDNAME, &nid); + error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); if (error) { info.retval = error; syslog(LOG_ERR, "Can't add user %s\n", pwd->pw_name); @@ -509,8 +545,10 @@ nfsuserdsrv(struct svc_req *rqstp, SVCXPRT *transp) nid.nid_name = defaultgroup; } nid.nid_namelen = strlen(nid.nid_name); + nid.nid_ngroup = 0; + nid.nid_grps = NULL; nid.nid_flag = NFSID_ADDGID; - error = nfssvc(NFSSVC_IDNAME, &nid); + error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); if (error) { info.retval = error; syslog(LOG_ERR, "Can't add group %s\n", @@ -541,8 +579,10 @@ nfsuserdsrv(struct svc_req *rqstp, SVCXPRT *transp) nid.nid_name = info.name; } nid.nid_namelen = strlen(nid.nid_name); + nid.nid_ngroup = 0; + nid.nid_grps = NULL; nid.nid_flag = NFSID_ADDUSERNAME; - error = nfssvc(NFSSVC_IDNAME, &nid); + error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); if (error) { info.retval = error; syslog(LOG_ERR, "Can't add user %s\n", pwd->pw_name); @@ -572,8 +612,10 @@ nfsuserdsrv(struct svc_req *rqstp, SVCXPRT *transp) nid.nid_name = info.name; } nid.nid_namelen = strlen(nid.nid_name); + nid.nid_ngroup = 0; + nid.nid_grps = NULL; nid.nid_flag = NFSID_ADDGROUPNAME; - error = nfssvc(NFSSVC_IDNAME, &nid); + error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); if (error) { info.retval = error; syslog(LOG_ERR, "Can't add group %s\n", @@ -679,5 +721,5 @@ usage(void) { errx(1, - "usage: nfsuserd [-usermax cache_size] [-usertimeout minutes] [-verbose] [-domain domain_name] [n]"); + "usage: nfsuserd [-usermax cache_size] [-usertimeout minutes] [-verbose] [-manage-gids] [-domain domain_name] [n]"); }