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-rw-r--r--support/nfs/exports.c999
1 files changed, 999 insertions, 0 deletions
diff --git a/support/nfs/exports.c b/support/nfs/exports.c
new file mode 100644
index 0000000..15dc574
--- /dev/null
+++ b/support/nfs/exports.c
@@ -0,0 +1,999 @@
+/*
+ * support/nfs/export.c
+ *
+ * Parse the exports file. Derived from the unfsd implementation.
+ *
+ * Authors: Donald J. Becker, <becker@super.org>
+ * Rick Sladkey, <jrs@world.std.com>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Olaf Kirch, <okir@monad.swb.de>
+ * Alexander O. Yuriev, <alex@bach.cis.temple.edu>
+ *
+ * This software maybe be used for any purpose provided
+ * the above copyright notice is retained. It is supplied
+ * as is, with no warranty expressed or implied.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/param.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+#include "nfslib.h"
+#include "exportfs.h"
+#include "xmalloc.h"
+#include "xlog.h"
+#include "xio.h"
+#include "pseudoflavors.h"
+#include "reexport.h"
+
+#define EXPORT_DEFAULT_FLAGS \
+ (NFSEXP_READONLY|NFSEXP_ROOTSQUASH|NFSEXP_GATHERED_WRITES|NFSEXP_NOSUBTREECHECK)
+
+struct flav_info flav_map[] = {
+ { "krb5", RPC_AUTH_GSS_KRB5, 1},
+ { "krb5i", RPC_AUTH_GSS_KRB5I, 1},
+ { "krb5p", RPC_AUTH_GSS_KRB5P, 1},
+ { "unix", AUTH_UNIX, 0},
+ { "sys", AUTH_SYS, 0},
+ { "null", AUTH_NULL, 0},
+ { "none", AUTH_NONE, 0},
+};
+
+const int flav_map_size = sizeof(flav_map)/sizeof(flav_map[0]);
+
+int default_ttl = 30 * 60;
+
+static char *efname = NULL;
+static XFILE *efp = NULL;
+static int first;
+static int has_default_opts, has_default_subtree_opts;
+static int *squids = NULL, nsquids = 0,
+ *sqgids = NULL, nsqgids = 0;
+
+static int getexport(char *exp, int len);
+static int getpath(char *path, int len);
+static int parseopts(char *cp, struct exportent *ep, int warn, int *had_subtree_opt_ptr);
+static int parsesquash(char *list, int **idp, int *lenp, char **ep);
+static int parsenum(char **cpp);
+static void freesquash(void);
+static void syntaxerr(char *msg);
+static struct flav_info *find_flavor(char *name);
+
+void
+setexportent(char *fname, char *type)
+{
+ if (efp)
+ endexportent();
+ if (!fname)
+ fname = _PATH_EXPORTS;
+ if (!(efp = xfopen(fname, type)))
+ xlog(L_ERROR, "can't open %s for %sing",
+ fname, strcmp(type, "r")? "writ" : "read");
+ efname = strdup(fname);
+ first = 1;
+}
+
+static void init_exportent (struct exportent *ee, int fromkernel)
+{
+ ee->e_flags = EXPORT_DEFAULT_FLAGS;
+ /* some kernels assume the default is sync rather than
+ * async. More recent kernels always report one or other,
+ * but this test makes sure we assume same as kernel
+ * Ditto for wgather
+ */
+ if (fromkernel) {
+ ee->e_flags &= ~NFSEXP_ASYNC;
+ ee->e_flags &= ~NFSEXP_GATHERED_WRITES;
+ }
+ ee->e_anonuid = 65534;
+ ee->e_anongid = 65534;
+ ee->e_squids = NULL;
+ ee->e_sqgids = NULL;
+ ee->e_mountpoint = NULL;
+ ee->e_fslocmethod = FSLOC_NONE;
+ ee->e_fslocdata = NULL;
+ ee->e_secinfo[0].flav = NULL;
+ ee->e_xprtsec[0].info = NULL;
+ ee->e_nsquids = 0;
+ ee->e_nsqgids = 0;
+ ee->e_uuid = NULL;
+ ee->e_ttl = default_ttl;
+ ee->e_reexport = REEXP_NONE;
+}
+
+struct exportent *
+getexportent(int fromkernel, int fromexports)
+{
+ static struct exportent ee, def_ee;
+ char exp[512], *hostname;
+ char rpath[MAXPATHLEN+1];
+ char *opt, *sp;
+ int ok;
+
+ if (!efp)
+ return NULL;
+
+ freesquash();
+
+ if (first || (ok = getexport(exp, sizeof(exp))) == 0) {
+ has_default_opts = 0;
+ has_default_subtree_opts = 0;
+
+ init_exportent(&def_ee, fromkernel);
+
+ ok = getpath(def_ee.e_path, sizeof(def_ee.e_path));
+ if (ok <= 0)
+ return NULL;
+
+ ok = getexport(exp, sizeof(exp));
+ }
+ if (ok < 0) {
+ xlog(L_ERROR, "expected client(options...)");
+ return NULL;
+ }
+ first = 0;
+
+ /*
+ * Check for default options. The kernel will never have default
+ * options in /proc/fs/nfs/exports, however due to the initial '-' in
+ * the -test-client- string from the test export we have to check that
+ * we're not reading from the kernel.
+ */
+ if (exp[0] == '-' && !fromkernel) {
+ if (parseopts(exp + 1, &def_ee, 0, &has_default_subtree_opts) < 0)
+ return NULL;
+
+ has_default_opts = 1;
+
+ ok = getexport(exp, sizeof(exp));
+ if (ok < 0) {
+ xlog(L_ERROR, "expected client(options...)");
+ return NULL;
+ }
+ }
+
+ xfree(ee.e_hostname);
+ xfree(ee.e_realpath);
+ ee = def_ee;
+
+ /* Check for default client */
+ if (ok == 0)
+ exp[0] = '\0';
+
+ hostname = exp;
+ if ((opt = strchr(exp, '(')) != NULL) {
+ if (opt == exp) {
+ xlog(L_WARNING, "No host name given with %s %s, suggest *%s to avoid warning", ee.e_path, exp, exp);
+ hostname = "*";
+ }
+ *opt++ = '\0';
+ if (!(sp = strchr(opt, ')')) || sp[1] != '\0') {
+ syntaxerr("bad option list");
+ return NULL;
+ }
+ *sp = '\0';
+ } else {
+ if (!has_default_opts)
+ xlog(L_WARNING, "No options for %s %s: suggest %s(sync) to avoid warning", ee.e_path, exp, exp);
+ }
+ ee.e_hostname = xstrdup(hostname);
+
+ if (parseopts(opt, &ee, fromexports && !has_default_subtree_opts, NULL) < 0) {
+ if(ee.e_hostname)
+ {
+ xfree(ee.e_hostname);
+ ee.e_hostname=NULL;
+ }
+ if(ee.e_uuid)
+ {
+ xfree(ee.e_uuid);
+ ee.e_uuid=NULL;
+ }
+
+ return NULL;
+ }
+ /* resolve symlinks */
+ if (realpath(ee.e_path, rpath) != NULL) {
+ rpath[sizeof (rpath) - 1] = '\0';
+ strncpy(ee.e_path, rpath, sizeof (ee.e_path) - 1);
+ ee.e_path[sizeof (ee.e_path) - 1] = '\0';
+ }
+
+ return &ee;
+}
+
+static const struct secinfo_flag_displaymap {
+ unsigned int flag;
+ const char *set;
+ const char *unset;
+} secinfo_flag_displaymap[] = {
+ { NFSEXP_READONLY, "ro", "rw" },
+ { NFSEXP_INSECURE_PORT, "insecure", "secure" },
+ { NFSEXP_ROOTSQUASH, "root_squash", "no_root_squash" },
+ { NFSEXP_ALLSQUASH, "all_squash", "no_all_squash" },
+ { 0, NULL, NULL }
+};
+
+static void secinfo_flags_show(FILE *fp, unsigned int flags, unsigned int mask)
+{
+ const struct secinfo_flag_displaymap *p;
+
+ for (p = &secinfo_flag_displaymap[0]; p->flag != 0; p++) {
+ if (!(mask & p->flag))
+ continue;
+ fprintf(fp, ",%s", (flags & p->flag) ? p->set : p->unset);
+ }
+}
+
+void secinfo_show(FILE *fp, struct exportent *ep)
+{
+ const struct export_features *ef;
+ struct sec_entry *p1, *p2;
+
+ ef = get_export_features();
+
+ if (ep->e_secinfo[0].flav == NULL)
+ secinfo_addflavor(find_flavor("sys"), ep);
+ for (p1=ep->e_secinfo; p1->flav; p1=p2) {
+ fprintf(fp, ",sec=%s", p1->flav->flavour);
+ for (p2=p1+1; (p2->flav != NULL) && (p1->flags == p2->flags);
+ p2++) {
+ fprintf(fp, ":%s", p2->flav->flavour);
+ }
+ secinfo_flags_show(fp, p1->flags, ef->secinfo_flags);
+ }
+}
+
+void xprtsecinfo_show(FILE *fp, struct exportent *ep)
+{
+ struct xprtsec_entry *p1, *p2;
+
+ for (p1 = ep->e_xprtsec; p1->info; p1 = p2) {
+ fprintf(fp, ",xprtsec=%s", p1->info->name);
+ for (p2 = p1 + 1; p2->info && (p1->flags == p2->flags); p2++)
+ fprintf(fp, ":%s", p2->info->name);
+ }
+}
+
+static void
+fprintpath(FILE *fp, const char *path)
+{
+ int i;
+ for (i=0; path[i]; i++)
+ if (iscntrl(path[i]) || path[i] == '"' || path[i] == '\\' || path[i] == '#' || isspace(path[i]))
+ fprintf(fp, "\\%03o", path[i]);
+ else
+ fprintf(fp, "%c", path[i]);
+}
+
+void
+putexportent(struct exportent *ep)
+{
+ FILE *fp;
+ int *id, i;
+
+ if (!efp)
+ return;
+
+ fp = efp->x_fp;
+ fprintpath(fp, ep->e_path);
+ fprintf(fp, "\t%s(", ep->e_hostname);
+ fprintf(fp, "%s,", (ep->e_flags & NFSEXP_READONLY)? "ro" : "rw");
+ fprintf(fp, "%ssync,", (ep->e_flags & NFSEXP_ASYNC)? "a" : "");
+ fprintf(fp, "%swdelay,", (ep->e_flags & NFSEXP_GATHERED_WRITES)?
+ "" : "no_");
+ fprintf(fp, "%shide,", (ep->e_flags & NFSEXP_NOHIDE)?
+ "no" : "");
+ fprintf(fp, "%scrossmnt,", (ep->e_flags & NFSEXP_CROSSMOUNT)?
+ "" : "no");
+ fprintf(fp, "%ssecure,", (ep->e_flags & NFSEXP_INSECURE_PORT)?
+ "in" : "");
+ fprintf(fp, "%sroot_squash,", (ep->e_flags & NFSEXP_ROOTSQUASH)?
+ "" : "no_");
+ fprintf(fp, "%sall_squash,", (ep->e_flags & NFSEXP_ALLSQUASH)?
+ "" : "no_");
+ fprintf(fp, "%ssubtree_check,", (ep->e_flags & NFSEXP_NOSUBTREECHECK)?
+ "no_" : "");
+ fprintf(fp, "%ssecure_locks,", (ep->e_flags & NFSEXP_NOAUTHNLM)?
+ "in" : "");
+ fprintf(fp, "%sacl,", (ep->e_flags & NFSEXP_NOACL)?
+ "no_" : "");
+ if (ep->e_flags & NFSEXP_NOREADDIRPLUS)
+ fprintf(fp, "nordirplus,");
+ if (ep->e_flags & NFSEXP_SECURITY_LABEL)
+ fprintf(fp, "security_label,");
+ fprintf(fp, "%spnfs,", (ep->e_flags & NFSEXP_PNFS)? "" : "no_");
+ if (ep->e_flags & NFSEXP_FSID) {
+ fprintf(fp, "fsid=%d,", ep->e_fsid);
+ }
+ if (ep->e_uuid)
+ fprintf(fp, "fsid=%s,", ep->e_uuid);
+
+ if (ep->e_reexport) {
+ fprintf(fp, "reexport=");
+ switch (ep->e_reexport) {
+ case REEXP_AUTO_FSIDNUM:
+ fprintf(fp, "auto-fsidnum");
+ break;
+ case REEXP_PREDEFINED_FSIDNUM:
+ fprintf(fp, "predefined-fsidnum");
+ break;
+ default:
+ xlog(L_ERROR, "unknown reexport method %i", ep->e_reexport);
+ fprintf(fp, "none");
+ }
+ fprintf(fp, ",");
+ }
+
+ if (ep->e_mountpoint)
+ fprintf(fp, "mountpoint%s%s,",
+ ep->e_mountpoint[0]?"=":"", ep->e_mountpoint);
+ switch (ep->e_fslocmethod) {
+ case FSLOC_NONE:
+ break;
+ case FSLOC_REFER:
+ fprintf(fp, "refer=");
+ fprintpath(fp, ep->e_fslocdata);
+ fprintf(fp, ",");
+ break;
+ case FSLOC_REPLICA:
+ fprintf(fp, "replicas=");
+ fprintpath(fp, ep->e_fslocdata);
+ fprintf(fp, ",");
+ break;
+#ifdef DEBUG
+ case FSLOC_STUB:
+ fprintf(fp, "fsloc=stub,");
+ break;
+#endif
+ default:
+ xlog(L_ERROR, "unknown fsloc method for %s:%s",
+ ep->e_hostname, ep->e_path);
+ }
+ if ((id = ep->e_squids) != NULL) {
+ fprintf(fp, "squash_uids=");
+ for (i = 0; i < ep->e_nsquids; i += 2)
+ if (id[i] != id[i+1])
+ fprintf(fp, "%d-%d,", id[i], id[i+1]);
+ else
+ fprintf(fp, "%d,", id[i]);
+ }
+ if ((id = ep->e_sqgids) != NULL) {
+ fprintf(fp, "squash_gids=");
+ for (i = 0; i < ep->e_nsquids; i += 2)
+ if (id[i] != id[i+1])
+ fprintf(fp, "%d-%d,", id[i], id[i+1]);
+ else
+ fprintf(fp, "%d,", id[i]);
+ }
+ fprintf(fp, "anonuid=%d,anongid=%d", ep->e_anonuid, ep->e_anongid);
+ secinfo_show(fp, ep);
+ xprtsecinfo_show(fp, ep);
+ fprintf(fp, ")\n");
+}
+
+void
+endexportent(void)
+{
+ if (efp)
+ xfclose(efp);
+ efp = NULL;
+ if (efname)
+ free(efname);
+ efname = NULL;
+ freesquash();
+}
+
+void
+dupexportent(struct exportent *dst, struct exportent *src)
+{
+ int n;
+
+ *dst = *src;
+ if ((n = src->e_nsquids) != 0) {
+ dst->e_squids = (int *) xmalloc(n * sizeof(int));
+ memcpy(dst->e_squids, src->e_squids, n * sizeof(int));
+ }
+ if ((n = src->e_nsqgids) != 0) {
+ dst->e_sqgids = (int *) xmalloc(n * sizeof(int));
+ memcpy(dst->e_sqgids, src->e_sqgids, n * sizeof(int));
+ }
+ if (src->e_mountpoint)
+ dst->e_mountpoint = strdup(src->e_mountpoint);
+ if (src->e_fslocdata)
+ dst->e_fslocdata = strdup(src->e_fslocdata);
+ if (src->e_uuid)
+ dst->e_uuid = strdup(src->e_uuid);
+ dst->e_hostname = NULL;
+ dst->e_realpath = NULL;
+}
+
+struct exportent *
+mkexportent(char *hname, char *path, char *options)
+{
+ static struct exportent ee;
+
+ init_exportent(&ee, 0);
+
+ xfree(ee.e_hostname);
+ ee.e_hostname = xstrdup(hname);
+ xfree(ee.e_realpath);
+ ee.e_realpath = NULL;
+
+ if (strlen(path) >= sizeof(ee.e_path)) {
+ xlog(L_ERROR, "path name %s too long", path);
+ return NULL;
+ }
+ strncpy(ee.e_path, path, sizeof (ee.e_path));
+ ee.e_path[sizeof (ee.e_path) - 1] = '\0';
+ if (parseopts(options, &ee, 0, NULL) < 0)
+ return NULL;
+ return &ee;
+}
+
+int
+updateexportent(struct exportent *eep, char *options)
+{
+ if (parseopts(options, eep, 0, NULL) < 0)
+ return 0;
+ return 1;
+}
+
+
+static int valid_uuid(char *uuid)
+{
+ /* must have 32 hex digits */
+ int cnt;
+ for (cnt = 0 ; *uuid; uuid++)
+ if (isxdigit(*uuid))
+ cnt++;
+ return cnt == 32;
+}
+
+/*
+ * Append the given flavor to the exportent's e_secinfo array, or
+ * do nothing if it's already there. Returns the index of flavor
+ * in the resulting array in any case.
+ */
+int secinfo_addflavor(struct flav_info *flav, struct exportent *ep)
+{
+ struct sec_entry *p;
+
+ for (p=ep->e_secinfo; p->flav; p++) {
+ if (p->flav == flav || p->flav->fnum == flav->fnum)
+ return p - ep->e_secinfo;
+ }
+ if (p - ep->e_secinfo >= SECFLAVOR_COUNT) {
+ xlog(L_ERROR, "more than %d security flavors on an export\n",
+ SECFLAVOR_COUNT);
+ return -1;
+ }
+ p->flav = flav;
+ p->flags = ep->e_flags;
+ (p+1)->flav = NULL;
+ return p - ep->e_secinfo;
+}
+
+static struct flav_info *find_flavor(char *name)
+{
+ struct flav_info *flav;
+ for (flav = flav_map; flav < flav_map + flav_map_size; flav++)
+ if (strcmp(flav->flavour, name) == 0)
+ return flav;
+ return NULL;
+}
+
+/* @str is a colon seperated list of security flavors. Their order
+ * is recorded in @ep, and a bitmap corresponding to the list is returned.
+ * A zero return indicates an error.
+ */
+static unsigned int parse_flavors(char *str, struct exportent *ep)
+{
+ unsigned int out=0;
+ char *flavor;
+ int bit;
+
+ while ( (flavor=strsep(&str, ":")) ) {
+ struct flav_info *flav = find_flavor(flavor);
+ if (flav == NULL) {
+ xlog(L_ERROR, "unknown flavor %s\n", flavor);
+ return 0;
+ }
+ bit = secinfo_addflavor(flav, ep);
+ if (bit < 0)
+ return 0;
+ out |= 1<<bit;
+ }
+ return out;
+}
+
+static const struct xprtsec_info xprtsec_name2info[] = {
+ { "none", NFSEXP_XPRTSEC_NONE },
+ { "tls", NFSEXP_XPRTSEC_TLS },
+ { "mtls", NFSEXP_XPRTSEC_MTLS },
+ { NULL, 0 }
+};
+
+static const struct xprtsec_info *find_xprtsec_info(const char *name)
+{
+ const struct xprtsec_info *info;
+
+ for (info = xprtsec_name2info; info->name; info++)
+ if (strcmp(info->name, name) == 0)
+ return info;
+ return NULL;
+}
+
+/*
+ * Append the given xprtsec mode to the exportent's e_xprtsec array,
+ * or do nothing if it's already there. Returns the index of flavor in
+ * the resulting array in any case.
+ */
+static int xprtsec_addmode(const struct xprtsec_info *info, struct exportent *ep)
+{
+ struct xprtsec_entry *p;
+
+ for (p = ep->e_xprtsec; p->info; p++)
+ if (p->info == info || p->info->number == info->number)
+ return p - ep->e_xprtsec;
+
+ if (p - ep->e_xprtsec >= XPRTSECMODE_COUNT) {
+ xlog(L_ERROR, "more than %d xprtsec modes on an export\n",
+ XPRTSECMODE_COUNT);
+ return -1;
+ }
+ p->info = info;
+ p->flags = ep->e_flags;
+ (p + 1)->info = NULL;
+ return p - ep->e_xprtsec;
+}
+
+/*
+ * @str is a colon seperated list of transport layer security modes.
+ * Their order is recorded in @ep, and a bitmap corresponding to the
+ * list is returned.
+ *
+ * A zero return indicates an error.
+ */
+static unsigned int parse_xprtsec(char *str, struct exportent *ep)
+{
+ unsigned int out = 0;
+ char *name;
+
+ while ((name = strsep(&str, ":"))) {
+ const struct xprtsec_info *info = find_xprtsec_info(name);
+ int bit;
+
+ if (!info) {
+ xlog(L_ERROR, "unknown xprtsec mode %s\n", name);
+ return 0;
+ }
+ bit = xprtsec_addmode(info, ep);
+ if (bit < 0)
+ return 0;
+ out |= 1 << bit;
+ }
+ return out;
+}
+
+/* Sets the bits in @mask for the appropriate security flavor flags. */
+static void setflags(int mask, unsigned int active, struct exportent *ep)
+{
+ int bit=0;
+
+ ep->e_flags |= mask;
+
+ while (active) {
+ if (active & 1)
+ ep->e_secinfo[bit].flags |= mask;
+ bit++;
+ active >>= 1;
+ }
+}
+
+/* Clears the bits in @mask for the appropriate security flavor flags. */
+static void clearflags(int mask, unsigned int active, struct exportent *ep)
+{
+ int bit=0;
+
+ ep->e_flags &= ~mask;
+
+ while (active) {
+ if (active & 1)
+ ep->e_secinfo[bit].flags &= ~mask;
+ bit++;
+ active >>= 1;
+ }
+}
+
+/*
+ * For those flags which are not allowed to vary by pseudoflavor,
+ * ensure that the export flags agree with the flags on each
+ * pseudoflavor:
+ */
+void fix_pseudoflavor_flags(struct exportent *ep)
+{
+ struct export_features *ef;
+ struct sec_entry *p;
+
+ ef = get_export_features();
+ for (p = ep->e_secinfo; p->flav; p++)
+ p->flags |= ep->e_flags & ~ef->secinfo_flags;
+}
+
+/*
+ * Parse option string pointed to by cp and set mount options accordingly.
+ */
+static int
+parseopts(char *cp, struct exportent *ep, int warn, int *had_subtree_opt_ptr)
+{
+ int had_subtree_opt = 0;
+ char *flname = efname?efname:"command line";
+ int flline = efp?efp->x_line:0;
+ unsigned int active = 0;
+ int saw_reexport = 0;
+
+ squids = ep->e_squids; nsquids = ep->e_nsquids;
+ sqgids = ep->e_sqgids; nsqgids = ep->e_nsqgids;
+ if (!cp)
+ goto out;
+
+ while (isblank(*cp))
+ cp++;
+
+ while (*cp) {
+ char *opt = strdup(cp);
+ char *optstart = cp;
+ while (*cp && *cp != ',')
+ cp++;
+ if (*cp) {
+ opt[cp-optstart] = '\0';
+ cp++;
+ }
+
+ /* process keyword */
+ if (strcmp(opt, "ro") == 0)
+ setflags(NFSEXP_READONLY, active, ep);
+ else if (strcmp(opt, "rw") == 0)
+ clearflags(NFSEXP_READONLY, active, ep);
+ else if (!strcmp(opt, "secure"))
+ clearflags(NFSEXP_INSECURE_PORT, active, ep);
+ else if (!strcmp(opt, "insecure"))
+ setflags(NFSEXP_INSECURE_PORT, active, ep);
+ else if (!strcmp(opt, "sync"))
+ clearflags(NFSEXP_ASYNC, active, ep);
+ else if (!strcmp(opt, "async"))
+ setflags(NFSEXP_ASYNC, active, ep);
+ else if (!strcmp(opt, "nordirplus"))
+ setflags(NFSEXP_NOREADDIRPLUS, active, ep);
+ else if (!strcmp(opt, "security_label"))
+ setflags(NFSEXP_SECURITY_LABEL, active, ep);
+ else if (!strcmp(opt, "nohide"))
+ setflags(NFSEXP_NOHIDE, active, ep);
+ else if (!strcmp(opt, "hide"))
+ clearflags(NFSEXP_NOHIDE, active, ep);
+ else if (!strcmp(opt, "crossmnt"))
+ setflags(NFSEXP_CROSSMOUNT, active, ep);
+ else if (!strcmp(opt, "nocrossmnt"))
+ clearflags(NFSEXP_CROSSMOUNT, active, ep);
+ else if (!strcmp(opt, "wdelay"))
+ setflags(NFSEXP_GATHERED_WRITES, active, ep);
+ else if (!strcmp(opt, "no_wdelay"))
+ clearflags(NFSEXP_GATHERED_WRITES, active, ep);
+ else if (strcmp(opt, "root_squash") == 0)
+ setflags(NFSEXP_ROOTSQUASH, active, ep);
+ else if (!strcmp(opt, "no_root_squash"))
+ clearflags(NFSEXP_ROOTSQUASH, active, ep);
+ else if (strcmp(opt, "all_squash") == 0)
+ setflags(NFSEXP_ALLSQUASH, active, ep);
+ else if (strcmp(opt, "no_all_squash") == 0)
+ clearflags(NFSEXP_ALLSQUASH, active, ep);
+ else if (strcmp(opt, "subtree_check") == 0) {
+ had_subtree_opt = 1;
+ clearflags(NFSEXP_NOSUBTREECHECK, active, ep);
+ } else if (strcmp(opt, "no_subtree_check") == 0) {
+ had_subtree_opt = 1;
+ setflags(NFSEXP_NOSUBTREECHECK, active, ep);
+ } else if (strcmp(opt, "auth_nlm") == 0)
+ clearflags(NFSEXP_NOAUTHNLM, active, ep);
+ else if (strcmp(opt, "no_auth_nlm") == 0)
+ setflags(NFSEXP_NOAUTHNLM, active, ep);
+ else if (strcmp(opt, "secure_locks") == 0)
+ clearflags(NFSEXP_NOAUTHNLM, active, ep);
+ else if (strcmp(opt, "insecure_locks") == 0)
+ setflags(NFSEXP_NOAUTHNLM, active, ep);
+ else if (strcmp(opt, "acl") == 0)
+ clearflags(NFSEXP_NOACL, active, ep);
+ else if (strcmp(opt, "no_acl") == 0)
+ setflags(NFSEXP_NOACL, active, ep);
+ else if (!strcmp(opt, "pnfs"))
+ setflags(NFSEXP_PNFS, active, ep);
+ else if (!strcmp(opt, "no_pnfs"))
+ clearflags(NFSEXP_PNFS, active, ep);
+ else if (strncmp(opt, "anonuid=", 8) == 0) {
+ char *oe;
+ ep->e_anonuid = strtol(opt+8, &oe, 10);
+ if (opt[8]=='\0' || *oe != '\0') {
+ xlog(L_ERROR, "%s: %d: bad anonuid \"%s\"\n",
+ flname, flline, opt);
+bad_option:
+ free(opt);
+ return -1;
+ }
+ } else if (strncmp(opt, "anongid=", 8) == 0) {
+ char *oe;
+ ep->e_anongid = strtol(opt+8, &oe, 10);
+ if (opt[8]=='\0' || *oe != '\0') {
+ xlog(L_ERROR, "%s: %d: bad anongid \"%s\"\n",
+ flname, flline, opt);
+ goto bad_option;
+ }
+ } else if (strncmp(opt, "squash_uids=", 12) == 0) {
+ if (parsesquash(opt+12, &squids, &nsquids, &cp) < 0) {
+ goto bad_option;
+ }
+ } else if (strncmp(opt, "squash_gids=", 12) == 0) {
+ if (parsesquash(opt+12, &sqgids, &nsqgids, &cp) < 0) {
+ goto bad_option;
+ }
+ } else if (strncmp(opt, "fsid=", 5) == 0) {
+ char *oe;
+
+ if (saw_reexport) {
+ xlog(L_ERROR, "%s:%d: 'fsid=' has to be before 'reexport=' %s\n",
+ flname, flline, opt);
+ goto bad_option;
+ }
+
+ if (strcmp(opt+5, "root") == 0) {
+ ep->e_fsid = 0;
+ setflags(NFSEXP_FSID, active, ep);
+ } else {
+ ep->e_fsid = strtoul(opt+5, &oe, 0);
+ if (opt[5]!='\0' && *oe == '\0')
+ setflags(NFSEXP_FSID, active, ep);
+ else if (valid_uuid(opt+5))
+ ep->e_uuid = strdup(opt+5);
+ else {
+ xlog(L_ERROR, "%s: %d: bad fsid \"%s\"\n",
+ flname, flline, opt);
+ goto bad_option;
+ }
+ }
+ } else if (strcmp(opt, "mountpoint")==0 ||
+ strcmp(opt, "mp") == 0 ||
+ strncmp(opt, "mountpoint=", 11)==0 ||
+ strncmp(opt, "mp=", 3) == 0) {
+ char * mp = strchr(opt, '=');
+ if (mp)
+ ep->e_mountpoint = strdup(mp+1);
+ else
+ ep->e_mountpoint = strdup("");
+#ifdef DEBUG
+ } else if (strncmp(opt, "fsloc=", 6) == 0) {
+ if (strcmp(opt+6, "stub") == 0)
+ ep->e_fslocmethod = FSLOC_STUB;
+ else {
+ xlog(L_ERROR, "%s:%d: bad option %s\n",
+ flname, flline, opt);
+ goto bad_option;
+ }
+#endif
+ } else if (strncmp(opt, "refer=", 6) == 0) {
+ ep->e_fslocmethod = FSLOC_REFER;
+ ep->e_fslocdata = strdup(opt+6);
+ } else if (strncmp(opt, "replicas=", 9) == 0) {
+ ep->e_fslocmethod = FSLOC_REPLICA;
+ ep->e_fslocdata = strdup(opt+9);
+ } else if (strncmp(opt, "sec=", 4) == 0) {
+ active = parse_flavors(opt+4, ep);
+ if (!active)
+ goto bad_option;
+ } else if (strncmp(opt, "xprtsec=", 8) == 0) {
+ if (!parse_xprtsec(opt + 8, ep))
+ goto bad_option;
+ } else if (strncmp(opt, "reexport=", 9) == 0) {
+ char *strategy = strchr(opt, '=');
+
+ if (!strategy) {
+ xlog(L_ERROR, "%s:%d: bad option %s\n",
+ flname, flline, opt);
+ goto bad_option;
+ }
+ strategy++;
+
+ if (saw_reexport) {
+ xlog(L_ERROR, "%s:%d: only one 'reexport=' is allowed%s\n",
+ flname, flline, opt);
+ goto bad_option;
+ }
+
+ if (strcmp(strategy, "auto-fsidnum") == 0) {
+ ep->e_reexport = REEXP_AUTO_FSIDNUM;
+ } else if (strcmp(strategy, "predefined-fsidnum") == 0) {
+ ep->e_reexport = REEXP_PREDEFINED_FSIDNUM;
+ } else if (strcmp(strategy, "none") == 0) {
+ ep->e_reexport = REEXP_NONE;
+ } else {
+ xlog(L_ERROR, "%s:%d: bad option %s\n",
+ flname, flline, strategy);
+ goto bad_option;
+ }
+
+ if (reexpdb_apply_reexport_settings(ep, flname, flline) != 0)
+ goto bad_option;
+
+ if (ep->e_fsid)
+ setflags(NFSEXP_FSID, active, ep);
+
+ saw_reexport = 1;
+ } else {
+ xlog(L_ERROR, "%s:%d: unknown keyword \"%s\"\n",
+ flname, flline, opt);
+ setflags(NFSEXP_ALLSQUASH | NFSEXP_READONLY, active, ep);
+ goto bad_option;
+ }
+ free(opt);
+ while (isblank(*cp))
+ cp++;
+ }
+
+ fix_pseudoflavor_flags(ep);
+ ep->e_squids = squids;
+ ep->e_sqgids = sqgids;
+ ep->e_nsquids = nsquids;
+ ep->e_nsqgids = nsqgids;
+
+out:
+ if (warn && !had_subtree_opt)
+ xlog(L_WARNING, "%s [%d]: Neither 'subtree_check' or 'no_subtree_check' specified for export \"%s:%s\".\n"
+ " Assuming default behaviour ('no_subtree_check').\n"
+ " NOTE: this default has changed since nfs-utils version 1.0.x\n",
+
+ flname, flline,
+ ep->e_hostname, ep->e_path);
+ if (had_subtree_opt_ptr)
+ *had_subtree_opt_ptr = had_subtree_opt;
+
+ return 1;
+}
+
+static int
+parsesquash(char *list, int **idp, int *lenp, char **ep)
+{
+ char *cp = list;
+ int id0, id1;
+ int len = *lenp;
+ int *id = *idp;
+
+ if (**ep)
+ *--(*ep) = ',';
+
+ do {
+ id0 = parsenum(&cp);
+ if (*cp == '-') {
+ cp++;
+ id1 = parsenum(&cp);
+ } else {
+ id1 = id0;
+ }
+ if (id0 == -1 || id1 == -1) {
+ syntaxerr("uid/gid -1 not permitted");
+ xfree(id);
+ return -1;
+ }
+ if ((len % 8) == 0)
+ id = (int *) xrealloc(id, (len + 8) * sizeof(*id));
+ id[len++] = id0;
+ id[len++] = id1;
+ if (!*cp || *cp == ')' || (*cp == ',' && !isdigit(cp[1])))
+ break;
+ if (*cp != ',') {
+ syntaxerr("bad uid/gid list");
+ xfree(id);
+ return -1;
+ }
+ cp++;
+ } while(1);
+
+ if (**ep == ',') (*ep)++;
+
+ *lenp = len;
+ *idp = id;
+ return 1;
+}
+
+static void
+freesquash(void)
+{
+ if (squids) {
+ xfree (squids);
+ squids = NULL;
+ nsquids = 0;
+ }
+ if (sqgids) {
+ xfree (sqgids);
+ sqgids = NULL;
+ nsqgids = 0;
+ }
+}
+
+static int
+parsenum(char **cpp)
+{
+ char *cp = *cpp, c;
+ int num = 0;
+
+ if (**cpp == '-')
+ (*cpp)++;
+ while (isdigit(**cpp))
+ (*cpp)++;
+ c = **cpp; **cpp = '\0'; num = atoi(cp); **cpp = c;
+ return num;
+}
+
+static int
+getpath(char *path, int len)
+{
+ xskip(efp, " \t\n");
+ return xgettok(efp, 0, path, len);
+}
+
+static int
+getexport(char *exp, int len)
+{
+ int ok;
+
+ xskip(efp, " \t");
+ if ((ok = xgettok(efp, 0, exp, len)) < 0)
+ xlog(L_ERROR, "%s:%d: syntax error",
+ efname?"command line":efname, efp->x_line);
+ return ok;
+}
+
+static void
+syntaxerr(char *msg)
+{
+ xlog(L_ERROR, "%s:%d: syntax error: %s",
+ efname, efp?efp->x_line:0, msg);
+}
+struct export_features *get_export_features(void)
+{
+ static char *path = "/proc/fs/nfsd/export_features";
+ static struct export_features ef;
+ static int cached = 0;
+ char buf[50];
+ int c;
+ int fd;
+
+ if (cached)
+ return &ef;
+
+ ef.flags = NFSEXP_OLDFLAGS;
+ ef.secinfo_flags = NFSEXP_OLD_SECINFO_FLAGS;
+
+ fd = open(path, O_RDONLY);
+ if (fd == -1)
+ goto good;
+ c = read(fd, buf, 50);
+ close(fd);
+ if (c == -1)
+ goto err;
+ buf[c] = 0;
+ c = sscanf(buf, "%x %x", &ef.flags, &ef.secinfo_flags);
+ if (c != 2)
+ goto err;
+good:
+ cached = 1;
+ return &ef;
+err:
+ xlog(L_WARNING, "unexpected error reading %s", path);
+ return &ef;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-04 00:40:19 +0000