svn commit: r362163 - head/usr.sbin/mountd
Rick Macklem
rmacklem at FreeBSD.org
Sun Jun 14 00:40:01 UTC 2020
Author: rmacklem
Date: Sun Jun 14 00:40:00 2020
New Revision: 362163
URL: https://svnweb.freebsd.org/changeset/base/362163
Log:
Modify mountd to use the new struct export_args committed by r362158.
r362158 modified struct export_args for make the ex_flags field 64bits
and also changed the anonymous credentials to allow more than 16 groups.
This patch fixes mountd.c to use the new structure.
It does allocate larger exportlist and grouplist structures now.
That will be fixed in a future commit.
The only visible change will be that the credentials provided for the
-maproot and -mapall exports options can now have more than 16 groups.
Reviewed by: kib, freqlabs
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D25088
Modified:
head/usr.sbin/mountd/mountd.c
Modified: head/usr.sbin/mountd/mountd.c
==============================================================================
--- head/usr.sbin/mountd/mountd.c Sun Jun 14 00:23:06 2020 (r362162)
+++ head/usr.sbin/mountd/mountd.c Sun Jun 14 00:40:00 2020 (r362163)
@@ -112,6 +112,15 @@ struct dirlist {
#define DP_DEFSET 0x1
#define DP_HOSTSET 0x2
+/*
+ * maproot/mapall credentials.
+ */
+struct expcred {
+ uid_t cr_uid;
+ int cr_ngroups;
+ gid_t cr_groups[NGROUPS_MAX + 1];
+};
+
struct exportlist {
struct dirlist *ex_dirl;
struct dirlist *ex_defdir;
@@ -120,8 +129,8 @@ struct exportlist {
fsid_t ex_fs;
char *ex_fsdir;
char *ex_indexfile;
- struct xucred ex_defanon;
- int ex_defexflags;
+ struct expcred ex_defanon;
+ uint64_t ex_defexflags;
int ex_numsecflavors;
int ex_secflavors[MAXSECFLAVORS];
int ex_defnumsecflavors;
@@ -152,8 +161,8 @@ struct grouplist {
int gr_type;
union grouptypes gr_ptr;
struct grouplist *gr_next;
- struct xucred gr_anon;
- int gr_exflags;
+ struct expcred gr_anon;
+ uint64_t gr_exflags;
int gr_flag;
int gr_numsecflavors;
int gr_secflavors[MAXSECFLAVORS];
@@ -194,7 +203,7 @@ struct fhreturn {
static char *add_expdir(struct dirlist **, char *, int);
static void add_dlist(struct dirlist **, struct dirlist *,
struct grouplist *, int, struct exportlist *,
- struct xucred *, int);
+ struct expcred *, uint64_t);
static void add_mlist(char *, char *);
static int check_dirpath(char *);
static int check_options(struct dirlist *);
@@ -208,10 +217,10 @@ static void clearout_service(void);
static void del_mlist(char *hostp, char *dirp);
static struct dirlist *dirp_search(struct dirlist *, char *);
static int do_export_mount(struct exportlist *, struct statfs *);
-static int do_mount(struct exportlist *, struct grouplist *, int,
- struct xucred *, char *, int, struct statfs *, int, int *);
+static int do_mount(struct exportlist *, struct grouplist *, uint64_t,
+ struct expcred *, char *, int, struct statfs *, int, int *);
static int do_opt(char **, char **, struct exportlist *,
- struct grouplist *, int *, int *, struct xucred *);
+ struct grouplist *, int *, uint64_t *, struct expcred *);
static struct exportlist *ex_search(fsid_t *, struct exportlisthead *);
static struct exportlist *get_exp(void);
static void free_dir(struct dirlist *);
@@ -226,7 +235,7 @@ static void free_exports(struct exportlisthead *);
static void read_exportfile(int);
static int compare_nmount_exportlist(struct iovec *, int, char *);
static int compare_export(struct exportlist *, struct exportlist *);
-static int compare_cred(struct xucred *, struct xucred *);
+static int compare_cred(struct expcred *, struct expcred *);
static int compare_secflavor(int *, int *, int);
static void delete_export(struct iovec *, int, struct statfs *, char *);
static int get_host(char *, struct grouplist *, struct grouplist *);
@@ -237,13 +246,13 @@ static int get_net(char *, struct netmsk *, int);
static void getexp_err(struct exportlist *, struct grouplist *, const char *);
static struct grouplist *get_grp(void);
static void hang_dirp(struct dirlist *, struct grouplist *,
- struct exportlist *, int, struct xucred *, int);
+ struct exportlist *, int, struct expcred *, uint64_t);
static void huphandler(int sig);
static int makemask(struct sockaddr_storage *ssp, int bitlen);
static void mntsrv(struct svc_req *, SVCXPRT *);
static void nextfield(char **, char **);
static void out_of_mem(void);
-static void parsecred(char *, struct xucred *);
+static void parsecred(char *, struct expcred *);
static int parsesec(char *, struct exportlist *);
static int put_exlist(struct dirlist *, XDR *, struct dirlist *,
int *, int);
@@ -259,6 +268,7 @@ static int xdr_explist_common(XDR *, caddr_t, int);
static int xdr_fhs(XDR *, caddr_t);
static int xdr_mlist(XDR *, caddr_t);
static void terminate(int);
+static void cp_cred(struct expcred *, struct expcred *);
#define EXPHASH(f) (fnv_32_buf((f), sizeof(fsid_t), 0) % exphashsize)
static struct exportlisthead *exphead = NULL;
@@ -268,13 +278,6 @@ static SLIST_HEAD(, mountlist) mlhead = SLIST_HEAD_INI
static char *exnames_default[2] = { _PATH_EXPORTS, NULL };
static char **exnames;
static char **hosts = NULL;
-static struct xucred def_anon = {
- XUCRED_VERSION,
- (uid_t)65534,
- 1,
- { (gid_t)65533 },
- { NULL }
-};
static int force_v2 = 0;
static int resvport_only = 1;
static int nhosts = 0;
@@ -1503,9 +1506,10 @@ get_exportlist_one(int passno)
struct grouplist *grp, *tgrp, *savgrp;
struct dirlist *dirhead;
struct statfs fsb;
- struct xucred anon;
+ struct expcred anon;
char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
- int len, has_host, exflags, got_nondir, dirplen, netgrp;
+ int len, has_host, got_nondir, dirplen, netgrp;
+ uint64_t exflags;
v4root_phase = 0;
dirhead = (struct dirlist *)NULL;
@@ -1521,7 +1525,9 @@ get_exportlist_one(int passno)
* Set defaults.
*/
has_host = FALSE;
- anon = def_anon;
+ anon.cr_uid = 65534;
+ anon.cr_ngroups = 1;
+ anon.cr_groups[0] = 65533;
exflags = MNT_EXPORTED;
got_nondir = 0;
opt_flags = 0;
@@ -1738,7 +1744,7 @@ get_exportlist_one(int passno)
grp = tgrp;
do {
grp->gr_exflags = exflags;
- grp->gr_anon = anon;
+ cp_cred(&grp->gr_anon, &anon);
if (v4root_phase == 2 && passno == 0)
LOGDEBUG("do_mount v4root");
if (passno == 0 && do_mount(ep, grp, exflags, &anon,
@@ -1878,7 +1884,7 @@ get_exportlist(int passno)
*/
bzero(&eargs, sizeof (eargs));
eargs.export.ex_flags = MNT_DELEXPORT;
- if (nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 &&
+ if (nfssvc(NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT, (caddr_t)&eargs) < 0 &&
errno != ENOENT)
syslog(LOG_ERR, "Can't delete exports for V4:");
@@ -2257,10 +2263,10 @@ compare_export(struct exportlist *ep, struct exportlis
} while (0)
/*
- * Compare to struct xucred's. Return 0 if the same and 1 otherwise.
+ * Compare two struct expcred's. Return 0 if the same and 1 otherwise.
*/
static int
-compare_cred(struct xucred *cr0, struct xucred *cr1)
+compare_cred(struct expcred *cr0, struct expcred *cr1)
{
if (cr0->cr_uid != cr1->cr_uid || cr0->cr_ngroups != cr1->cr_ngroups)
@@ -2425,7 +2431,7 @@ add_expdir(struct dirlist **dpp, char *cp, int len)
*/
static void
hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
- int flags, struct xucred *anoncrp, int exflags)
+ int flags, struct expcred *anoncrp, uint64_t exflags)
{
struct hostlist *hp;
struct dirlist *dp2;
@@ -2443,7 +2449,7 @@ hang_dirp(struct dirlist *dp, struct grouplist *grp, s
if (ep->ex_numsecflavors > 0)
memcpy(ep->ex_defsecflavors, ep->ex_secflavors,
sizeof(ep->ex_secflavors));
- ep->ex_defanon = *anoncrp;
+ cp_cred(&ep->ex_defanon, anoncrp);
ep->ex_defexflags = exflags;
} else while (grp) {
hp = get_ht();
@@ -2477,7 +2483,8 @@ hang_dirp(struct dirlist *dp, struct grouplist *grp, s
*/
static void
add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
- int flags, struct exportlist *ep, struct xucred *anoncrp, int exflags)
+ int flags, struct exportlist *ep, struct expcred *anoncrp,
+ uint64_t exflags)
{
struct dirlist *dp;
struct hostlist *hp;
@@ -2526,7 +2533,7 @@ add_dlist(struct dirlist **dpp, struct dirlist *newdp,
if (ep->ex_numsecflavors > 0)
memcpy(ep->ex_defsecflavors, ep->ex_secflavors,
sizeof(ep->ex_secflavors));
- ep->ex_defanon = *anoncrp;
+ cp_cred(&ep->ex_defanon, anoncrp);
ep->ex_defexflags = exflags;
}
}
@@ -2698,7 +2705,7 @@ parsesec(char *seclist, struct exportlist *ep)
*/
static int
do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
- int *has_hostp, int *exflagsp, struct xucred *cr)
+ int *has_hostp, uint64_t *exflagsp, struct expcred *cr)
{
char *cpoptarg, *cpoptend;
char *cp, *endcp, *cpopt, savedc, savedc2;
@@ -2960,7 +2967,7 @@ do_export_mount(struct exportlist *ep, struct statfs *
defgrp.gr_type = GT_DEFAULT;
defgrp.gr_next = NULL;
/* We have an entry for all other hosts/nets. */
- LOGDEBUG("ex_defexflags=0x%x", ep->ex_defexflags);
+ LOGDEBUG("ex_defexflags=0x%jx", (uintmax_t)ep->ex_defexflags);
ret = do_mount(ep, &defgrp, ep->ex_defexflags, &ep->ex_defanon,
ep->ex_fsdir, dirlen, fsp, ep->ex_defnumsecflavors,
ep->ex_defsecflavors);
@@ -2971,8 +2978,8 @@ do_export_mount(struct exportlist *ep, struct statfs *
/* Do a mount for each group. */
grp = ep->ex_grphead;
while (grp != NULL) {
- LOGDEBUG("do mount gr_type=0x%x gr_exflags=0x%x",
- grp->gr_type, grp->gr_exflags);
+ LOGDEBUG("do mount gr_type=0x%x gr_exflags=0x%jx",
+ grp->gr_type, (uintmax_t)grp->gr_exflags);
ret = do_mount(ep, grp, grp->gr_exflags, &grp->gr_anon,
ep->ex_fsdir, dirlen, fsp, grp->gr_numsecflavors,
grp->gr_secflavors);
@@ -2988,8 +2995,8 @@ do_export_mount(struct exportlist *ep, struct statfs *
* the kernel.
*/
static int
-do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
- struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb,
+do_mount(struct exportlist *ep, struct grouplist *grp, uint64_t exflags,
+ struct expcred *anoncrp, char *dirp, int dirplen, struct statfs *fsb,
int numsecflavors, int *secflavors)
{
struct statfs fsb1;
@@ -3015,8 +3022,14 @@ do_mount(struct exportlist *ep, struct grouplist *grp,
bzero(eap, sizeof (struct export_args));
bzero(errmsg, sizeof(errmsg));
eap->ex_flags = exflags;
- eap->ex_anon = *anoncrp;
- LOGDEBUG("do_mount exflags=0x%x", exflags);
+ eap->ex_uid = anoncrp->cr_uid;
+ eap->ex_ngroups = anoncrp->cr_ngroups;
+ if (eap->ex_ngroups > 0) {
+ eap->ex_groups = malloc(eap->ex_ngroups * sizeof(gid_t));
+ memcpy(eap->ex_groups, anoncrp->cr_groups, eap->ex_ngroups *
+ sizeof(gid_t));
+ }
+ LOGDEBUG("do_mount exflags=0x%jx", (uintmax_t)exflags);
eap->ex_indexfile = ep->ex_indexfile;
if (grp->gr_type == GT_HOST)
ai = grp->gr_ptr.gt_addrinfo;
@@ -3086,9 +3099,11 @@ do_mount(struct exportlist *ep, struct grouplist *grp,
*/
if (v4root_phase == 2) {
nfsea.fspec = v4root_dirpath;
- if (nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) {
+ if (nfssvc(NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT,
+ (caddr_t)&nfsea) < 0) {
syslog(LOG_ERR, "Exporting V4: failed");
- return (2);
+ ret = 2;
+ goto error_exit;
}
} else {
/*
@@ -3203,6 +3218,7 @@ skip:
if (cp)
*cp = savedc;
error_exit:
+ free(eap->ex_groups);
/* free strings allocated by strdup() in getmntopts.c */
if (iov != NULL) {
free(iov[0].iov_base); /* fstype */
@@ -3429,17 +3445,14 @@ get_line(void)
* Parse a description of a credential.
*/
static void
-parsecred(char *namelist, struct xucred *cr)
+parsecred(char *namelist, struct expcred *cr)
{
char *name;
int cnt;
char *names;
struct passwd *pw;
struct group *gr;
- gid_t groups[XU_NGROUPS + 1];
- int ngroups;
- cr->cr_version = XUCRED_VERSION;
/*
* Set up the unprivileged user.
*/
@@ -3465,27 +3478,24 @@ parsecred(char *namelist, struct xucred *cr)
return;
}
cr->cr_uid = pw->pw_uid;
- ngroups = XU_NGROUPS + 1;
- if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) {
+ cr->cr_ngroups = NGROUPS_MAX + 1;
+ if (getgrouplist(pw->pw_name, pw->pw_gid, cr->cr_groups,
+ &cr->cr_ngroups)) {
syslog(LOG_ERR, "too many groups");
- ngroups = XU_NGROUPS + 1;
+ cr->cr_ngroups = NGROUPS_MAX + 1;
}
/*
* Compress out duplicate.
*/
- cr->cr_groups[0] = groups[0];
- if (ngroups > 1 && groups[0] == groups[1]) {
- cr->cr_ngroups = ngroups - 1;
- for (cnt = 2; cnt < ngroups; cnt++)
- cr->cr_groups[cnt - 1] = groups[cnt];
- } else {
- cr->cr_ngroups = ngroups;
- if (cr->cr_ngroups > XU_NGROUPS)
- cr->cr_ngroups = XU_NGROUPS;
- for (cnt = 1; cnt < ngroups; cnt++)
- cr->cr_groups[cnt] = groups[cnt];
+ if (cr->cr_ngroups > 1 && cr->cr_groups[0] ==
+ cr->cr_groups[1]) {
+ for (cnt = 2; cnt < cr->cr_ngroups; cnt++)
+ cr->cr_groups[cnt - 1] = cr->cr_groups[cnt];
+ cr->cr_ngroups--;
}
+ if (cr->cr_ngroups > NGROUPS_MAX)
+ cr->cr_ngroups = NGROUPS_MAX;
return;
}
/*
@@ -3501,7 +3511,7 @@ parsecred(char *namelist, struct xucred *cr)
return;
}
cr->cr_ngroups = 0;
- while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) {
+ while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS_MAX) {
name = strsep_quote(&names, ":");
if (isdigit(*name) || *name == '-') {
cr->cr_groups[cr->cr_ngroups++] = atoi(name);
@@ -3513,7 +3523,7 @@ parsecred(char *namelist, struct xucred *cr)
cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
}
}
- if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS)
+ if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS_MAX)
syslog(LOG_ERR, "too many groups");
}
@@ -3833,4 +3843,14 @@ terminate(int sig __unused)
rpcb_unset(MOUNTPROG, MOUNTVERS, NULL);
rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL);
exit (0);
+}
+
+static void
+cp_cred(struct expcred *outcr, struct expcred *incr)
+{
+
+ outcr->cr_uid = incr->cr_uid;
+ outcr->cr_ngroups = incr->cr_ngroups;
+ memcpy(outcr->cr_groups, incr->cr_groups, incr->cr_ngroups *
+ sizeof(gid_t));
}
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