* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <string.h>
#include <sys/types.h>
#include "nfslib.h"
#include "exportfs.h"
-nfs_export *exportlist[MCL_MAXTYPES] = { NULL, };
+exp_hash_table exportlist[MCL_MAXTYPES] = {{NULL, {{NULL,NULL}, }}, };
+static int export_hash(char *);
static void export_init(nfs_export *exp, nfs_client *clp,
struct exportent *nep);
-static int export_check(nfs_export *, struct hostent *, char *);
+static void export_add(nfs_export *exp);
+static int export_check(const nfs_export *exp, const struct addrinfo *ai,
+ const char *path);
static nfs_export *
- export_allowed_internal(struct hostent *hp, char *path);
+ export_allowed_internal(const struct addrinfo *ai,
+ const char *path);
-int
+void
+exportent_release(struct exportent *eep)
+{
+ xfree(eep->e_squids);
+ xfree(eep->e_sqgids);
+ free(eep->e_mountpoint);
+ free(eep->e_fslocdata);
+ free(eep->e_uuid);
+ xfree(eep->e_hostname);
+}
+
+static void
+export_free(nfs_export *exp)
+{
+ exportent_release(&exp->m_export);
+ xfree(exp);
+}
+
+static void warn_duplicated_exports(nfs_export *exp, struct exportent *eep)
+{
+ if (exp->m_export.e_flags != eep->e_flags) {
+ xlog(L_ERROR, "incompatible duplicated export entries:");
+ xlog(L_ERROR, "\t%s:%s (0x%x) [IGNORED]", eep->e_hostname,
+ eep->e_path, eep->e_flags);
+ xlog(L_ERROR, "\t%s:%s (0x%x)", exp->m_export.e_hostname,
+ exp->m_export.e_path, exp->m_export.e_flags);
+ } else {
+ xlog(L_ERROR, "duplicated export entries:");
+ xlog(L_ERROR, "\t%s:%s", eep->e_hostname, eep->e_path);
+ xlog(L_ERROR, "\t%s:%s", exp->m_export.e_hostname,
+ exp->m_export.e_path);
+ }
+}
+
+/**
+ * export_read - read entries from /etc/exports
+ * @fname: name of file to read from
+ *
+ */
+void
export_read(char *fname)
{
struct exportent *eep;
nfs_export *exp;
setexportent(fname, "r");
- while ((eep = getexportent()) != NULL) {
- exp = export_lookup(eep->e_hostname, eep->e_path, 0);
- if (!exp)
- export_create(eep,0);
- else {
- if (exp->m_export.e_flags != eep->e_flags) {
- xlog(L_ERROR, "incompatible duplicated export entries:");
- xlog(L_ERROR, "\t%s:%s (0x%x) [IGNORED]", eep->e_hostname,
- eep->e_path, eep->e_flags);
- xlog(L_ERROR, "\t%s:%s (0x%x)", exp->m_export.e_hostname,
- exp->m_export.e_path, exp->m_export.e_flags);
- }
- else {
- xlog(L_ERROR, "duplicated export entries:");
- xlog(L_ERROR, "\t%s:%s", eep->e_hostname, eep->e_path);
- xlog(L_ERROR, "\t%s:%s", exp->m_export.e_hostname,
- exp->m_export.e_path);
- }
- }
+ while ((eep = getexportent(0,1)) != NULL) {
+ exp = export_lookup(eep->e_hostname, eep->e_path, 0);
+ if (!exp)
+ export_create(eep, 0);
+ else
+ warn_duplicated_exports(exp, eep);
}
endexportent();
-
- return 0;
}
-/*
- * Create an in-core export struct from an export entry.
+/**
+ * export_create - create an in-core nfs_export record from an export entry
+ * @xep: export entry to lookup
+ * @canonical: if set, e_hostname is known to be canonical DNS name
+ *
+ * Returns a freshly instantiated export record, or NULL if
+ * a problem occurred.
*/
nfs_export *
export_create(struct exportent *xep, int canonical)
struct exportent *e = &exp->m_export;
dupexportent(e, nep);
+ if (nep->e_hostname)
+ e->e_hostname = xstrdup(nep->e_hostname);
exp->m_exported = 0;
exp->m_xtabent = 0;
exp->m_mayexport = 0;
exp->m_changed = 0;
+ exp->m_warned = 0;
exp->m_client = clp;
clp->m_count++;
}
* original hostname from /etc/exports, while the in-core client struct
* gets the newly found FQDN.
*/
-nfs_export *
-export_dup(nfs_export *exp, struct hostent *hp)
+static nfs_export *
+export_dup(nfs_export *exp, const struct addrinfo *ai)
{
nfs_export *new;
nfs_client *clp;
new = (nfs_export *) xmalloc(sizeof(*new));
memcpy(new, exp, sizeof(*new));
dupexportent(&new->m_export, &exp->m_export);
- clp = client_dup(exp->m_client, hp);
+ if (exp->m_export.e_hostname)
+ new->m_export.e_hostname = xstrdup(exp->m_export.e_hostname);
+ clp = client_dup(exp->m_client, ai);
+ if (clp == NULL) {
+ export_free(new);
+ return NULL;
+ }
clp->m_count++;
new->m_client = clp;
new->m_mayexport = exp->m_mayexport;
new->m_exported = 0;
new->m_xtabent = 0;
new->m_changed = 0;
+ new->m_warned = 0;
export_add(new);
return new;
}
-void
+static void
export_add(nfs_export *exp)
{
- nfs_export **epp;
- int type = exp->m_client->m_type;
- int slen = strlen(exp->m_export.e_path);
-
- if (type < 0 || type >= MCL_MAXTYPES)
- xlog(L_FATAL, "unknown client type in export_add");
-
- epp = exportlist + type;
- while (*epp && slen < strlen((*epp)->m_export.e_path))
- epp = &((*epp)->m_next);
- exp->m_next = *epp;
- *epp = exp;
+ exp_hash_table *p_tbl;
+ exp_hash_entry *p_hen;
+ nfs_export *p_next;
+
+ int type = exp->m_client->m_type;
+ int pos;
+
+ pos = export_hash(exp->m_export.e_path);
+ p_tbl = &(exportlist[type]); /* pointer to hash table */
+ p_hen = &(p_tbl->entries[pos]); /* pointer to hash table entry */
+
+ if (!(p_hen->p_first)) { /* hash table entry is empty */
+ p_hen->p_first = exp;
+ p_hen->p_last = exp;
+
+ exp->m_next = p_tbl->p_head;
+ p_tbl->p_head = exp;
+ } else { /* hash table entry is NOT empty */
+ p_next = p_hen->p_last->m_next;
+ p_hen->p_last->m_next = exp;
+ exp->m_next = p_next;
+ p_hen->p_last = exp;
+ }
}
+/**
+ * export_find - find or create a suitable nfs_export for @ai and @path
+ * @ai: pointer to addrinfo for client
+ * @path: '\0'-terminated ASCII string containing export path
+ *
+ * Returns a pointer to nfs_export data matching @ai and @path,
+ * or NULL if an error occurs.
+ */
nfs_export *
-export_find(struct hostent *hp, char *path)
+export_find(const struct addrinfo *ai, const char *path)
{
nfs_export *exp;
int i;
for (i = 0; i < MCL_MAXTYPES; i++) {
- for (exp = exportlist[i]; exp; exp = exp->m_next) {
- if (!export_check(exp, hp, path))
+ for (exp = exportlist[i].p_head; exp; exp = exp->m_next) {
+ if (!export_check(exp, ai, path))
continue;
if (exp->m_client->m_type == MCL_FQDN)
return exp;
- return export_dup(exp, hp);
+ return export_dup(exp, ai);
}
}
}
static nfs_export *
-export_allowed_internal (struct hostent *hp, char *path)
+export_allowed_internal(const struct addrinfo *ai, const char *path)
{
nfs_export *exp;
int i;
for (i = 0; i < MCL_MAXTYPES; i++) {
- for (exp = exportlist[i]; exp; exp = exp->m_next) {
+ for (exp = exportlist[i].p_head; exp; exp = exp->m_next) {
if (!exp->m_mayexport ||
- !export_check(exp, hp, path))
+ !export_check(exp, ai, path))
continue;
return exp;
}
return NULL;
}
-struct exportent *
-export_allowed(struct hostent *hp, char *path)
+/**
+ * export_allowed - determine if this export is allowed
+ * @ai: pointer to addrinfo for client
+ * @path: '\0'-terminated ASCII string containing export path
+ *
+ * Returns a pointer to nfs_export data matching @ai and @path,
+ * or NULL if the export is not allowed.
+ */
+nfs_export *
+export_allowed(const struct addrinfo *ai, const char *path)
{
- static struct exportent ee;
nfs_export *exp;
char epath[MAXPATHLEN+1];
char *p = NULL;
/* Try the longest matching exported pathname. */
while (1) {
- exp = export_allowed_internal (hp, epath);
- if (exp) {
- dupexportent(&ee, &exp->m_export);
- return ⅇ
- }
+ exp = export_allowed_internal(ai, epath);
+ if (exp)
+ return exp;
/* We have to treat the root, "/", specially. */
if (p == &epath[1]) break;
p = strrchr(epath, '/');
return NULL;
}
+/**
+ * export_lookup - search hash table for export entry
+ * @hname: '\0'-terminated ASCII string containing client hostname to look for
+ * @path: '\0'-terminated ASCII string containing export path to look for
+ * @canonical: if set, @hname is known to be canonical DNS name
+ *
+ * Returns a pointer to nfs_export record matching @hname and @path,
+ * or NULL if the export was not found.
+ */
nfs_export *
export_lookup(char *hname, char *path, int canonical)
{
- nfs_client *clp;
- nfs_export *exp;
+ nfs_client *clp;
+ nfs_export *exp;
+ exp_hash_entry *p_hen;
+
+ int pos;
- if (!(clp = client_lookup(hname, canonical)))
+ clp = client_lookup(hname, canonical);
+ if(clp == NULL)
return NULL;
- for (exp = exportlist[clp->m_type]; exp; exp = exp->m_next)
- if (exp->m_client == clp && !strcmp(exp->m_export.e_path, path))
- return exp;
+
+ pos = export_hash(path);
+ p_hen = &(exportlist[clp->m_type].entries[pos]);
+ for(exp = p_hen->p_first; exp && (exp != p_hen->p_last->m_next);
+ exp = exp->m_next) {
+ if (exp->m_client == clp && !strcmp(exp->m_export.e_path, path)) {
+ return exp;
+ }
+ }
return NULL;
}
static int
-export_check(nfs_export *exp, struct hostent *hp, char *path)
+export_check(const nfs_export *exp, const struct addrinfo *ai, const char *path)
{
if (strcmp(path, exp->m_export.e_path))
return 0;
- return client_check(exp->m_client, hp);
+ return client_check(exp->m_client, ai);
}
+/**
+ * export_freeall - deallocate all nfs_export records
+ *
+ */
void
export_freeall(void)
{
nfs_export *exp, *nxt;
- int i;
+ int i, j;
for (i = 0; i < MCL_MAXTYPES; i++) {
- for (exp = exportlist[i]; exp; exp = nxt) {
+ for (exp = exportlist[i].p_head; exp; exp = nxt) {
nxt = exp->m_next;
client_release(exp->m_client);
- if (exp->m_export.e_squids)
- xfree(exp->m_export.e_squids);
- if (exp->m_export.e_sqgids)
- xfree(exp->m_export.e_sqgids);
- xfree(exp);
+ export_free(exp);
}
- exportlist[i] = NULL;
+ for (j = 0; j < HASH_TABLE_SIZE; j++) {
+ exportlist[i].entries[j].p_first = NULL;
+ exportlist[i].entries[j].p_last = NULL;
+ }
+ exportlist[i].p_head = NULL;
}
client_freeall();
}
-void
-export_reset(nfs_export *exp)
+/*
+ * Compute and returns integer from string.
+ * Note: Its understood the smae integers can be same for
+ * different strings, but it should not matter.
+ */
+static unsigned int
+strtoint(char *str)
+{
+ int i = 0;
+ unsigned int n = 0;
+
+ while ( str[i] != '\0') {
+ n+=((int)str[i])*i;
+ i++;
+ }
+ return n;
+}
+
+/*
+ * Hash function
+ */
+static int
+export_hash(char *str)
{
- if (!exp)
- return;
+ unsigned int num = strtoint(str);
- /* Restore m_path. */
- strncpy(exp->m_export.m_path, exp->m_export.e_path,
- sizeof (exp->m_export.m_path) - 1);
- exp->m_export.m_path[sizeof (exp->m_export.m_path) - 1] = '\0';
+ return num % HASH_TABLE_SIZE;
}