mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-15 10:17:20 +00:00
ed56328b92
idmap_add failure case (found by Ted Unangst via Colin Percival) also convert idmap_hashf to return void, since it can't fail also change some panics to error returns
509 lines
12 KiB
C
509 lines
12 KiB
C
/* $FreeBSD$ */
|
|
/* $Id: nfs4_idmap.c,v 1.4 2003/11/05 14:58:59 rees Exp $ */
|
|
|
|
/*
|
|
* copyright (c) 2003
|
|
* the regents of the university of michigan
|
|
* all rights reserved
|
|
*
|
|
* permission is granted to use, copy, create derivative works and redistribute
|
|
* this software and such derivative works for any purpose, so long as the name
|
|
* of the university of michigan is not used in any advertising or publicity
|
|
* pertaining to the use or distribution of this software without specific,
|
|
* written prior authorization. if the above copyright notice or any other
|
|
* identification of the university of michigan is included in any copy of any
|
|
* portion of this software, then the disclaimer below must also be included.
|
|
*
|
|
* this software is provided as is, without representation from the university
|
|
* of michigan as to its fitness for any purpose, and without warranty by the
|
|
* university of michigan of any kind, either express or implied, including
|
|
* without limitation the implied warranties of merchantability and fitness for
|
|
* a particular purpose. the regents of the university of michigan shall not be
|
|
* liable for any damages, including special, indirect, incidental, or
|
|
* consequential damages, with respect to any claim arising out of or in
|
|
* connection with the use of the software, even if it has been or is hereafter
|
|
* advised of the possibility of such damages.
|
|
*/
|
|
|
|
/* TODO:
|
|
* o validate ascii
|
|
* */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/lockmgr.h>
|
|
#include <sys/fnv_hash.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/libkern.h>
|
|
|
|
#include <rpc/rpcclnt.h>
|
|
|
|
#include <nfs4client/nfs4_dev.h>
|
|
#include <nfs4client/nfs4_idmap.h>
|
|
|
|
|
|
#ifdef IDMAPVERBOSE
|
|
#define IDMAP_DEBUG(...) printf(__VA_ARGS__);
|
|
#else
|
|
#define IDMAP_DEBUG(...)
|
|
#endif
|
|
|
|
#define IDMAP_HASH_SIZE 37
|
|
|
|
MALLOC_DEFINE(M_IDMAP, "idmap", "idmap");
|
|
|
|
#define idmap_entry_get(ID) MALLOC((ID), struct idmap_entry, sizeof(struct idmap_entry), M_IDMAP, M_WAITOK | M_ZERO)
|
|
#define idmap_entry_put(ID) FREE((ID), M_IDMAP)
|
|
|
|
|
|
|
|
struct idmap_entry {
|
|
struct idmap_msg id_info;
|
|
|
|
TAILQ_ENTRY(idmap_entry) id_entry_id;
|
|
TAILQ_ENTRY(idmap_entry) id_entry_name;
|
|
};
|
|
|
|
struct idmap_hash {
|
|
TAILQ_HEAD(, idmap_entry) hash_name[IDMAP_HASH_SIZE];
|
|
TAILQ_HEAD(, idmap_entry) hash_id[IDMAP_HASH_SIZE];
|
|
|
|
struct lock hash_lock;
|
|
};
|
|
|
|
#define IDMAP_RLOCK(lock) lockmgr(lock, LK_SHARED, NULL, curthread)
|
|
#define IDMAP_WLOCK(lock) lockmgr(lock, LK_EXCLUSIVE, NULL, curthread)
|
|
#define IDMAP_UNLOCK(lock) lockmgr(lock, LK_RELEASE, NULL, curthread)
|
|
|
|
|
|
static struct idmap_hash idmap_uid_hash;
|
|
static struct idmap_hash idmap_gid_hash;
|
|
|
|
static struct idmap_entry * idmap_name_lookup(uint32_t, char *);
|
|
static struct idmap_entry * idmap_id_lookup(uint32_t, ident_t);
|
|
static int idmap_upcall_name(uint32_t, char *, struct idmap_entry **);
|
|
static int idmap_upcall_id(uint32_t , ident_t, struct idmap_entry ** );
|
|
static int idmap_add(struct idmap_entry *);
|
|
|
|
static int
|
|
idmap_upcall_name(uint32_t type, char * name, struct idmap_entry ** found)
|
|
{
|
|
int error;
|
|
struct idmap_entry * e;
|
|
size_t len, siz;
|
|
|
|
if (type > IDMAP_MAX_TYPE || type == 0) {
|
|
IDMAP_DEBUG("bad type %d\n", type);
|
|
return EINVAL; /* XXX */
|
|
}
|
|
|
|
if (name == NULL || (len = strlen(name)) == 0 || len > IDMAP_MAXNAMELEN) {
|
|
IDMAP_DEBUG("idmap_upcall_name: bad name\n");
|
|
return EFAULT; /* XXX */
|
|
}
|
|
|
|
MALLOC(e, struct idmap_entry *, sizeof(struct idmap_entry), M_IDMAP,
|
|
M_WAITOK | M_ZERO);
|
|
|
|
e->id_info.id_type = type;
|
|
bcopy(name, e->id_info.id_name, len);
|
|
e->id_info.id_namelen = len;
|
|
|
|
|
|
siz = sizeof(struct idmap_msg);
|
|
error = nfs4dev_call(NFS4DEV_TYPE_IDMAP, (caddr_t)&e->id_info, siz,
|
|
(caddr_t)&e->id_info, &siz);
|
|
|
|
if (error) {
|
|
IDMAP_DEBUG("error %d in nfs4dev_upcall()\n", error);
|
|
*found = NULL;
|
|
return error;
|
|
}
|
|
|
|
if (siz != sizeof(struct idmap_msg)) {
|
|
IDMAP_DEBUG("bad size of returned message\n");
|
|
*found = NULL;
|
|
return EFAULT;
|
|
}
|
|
|
|
*found = e;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
idmap_upcall_id(uint32_t type, ident_t id, struct idmap_entry ** found)
|
|
{
|
|
int error;
|
|
struct idmap_entry * e;
|
|
size_t siz;
|
|
|
|
if (type > IDMAP_MAX_TYPE)
|
|
panic("bad type"); /* XXX */
|
|
|
|
MALLOC(e, struct idmap_entry *, sizeof(struct idmap_entry), M_IDMAP,
|
|
M_WAITOK | M_ZERO);
|
|
|
|
e->id_info.id_type = type;
|
|
e->id_info.id_namelen = 0; /* should already */
|
|
e->id_info.id_id = id;
|
|
|
|
siz = sizeof(struct idmap_msg);
|
|
error = nfs4dev_call(NFS4DEV_TYPE_IDMAP, (caddr_t)&e->id_info, siz,
|
|
(caddr_t)&e->id_info, &siz);
|
|
|
|
if (error) {
|
|
IDMAP_DEBUG("error %d in nfs4dev_upcall()\n", error);
|
|
*found = NULL;
|
|
return error;
|
|
}
|
|
|
|
if (siz != sizeof(struct idmap_msg)) {
|
|
IDMAP_DEBUG("bad size of returned message\n");
|
|
*found = NULL;
|
|
return EFAULT;
|
|
}
|
|
|
|
*found = e;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
idmap_hashf(struct idmap_entry *e, uint32_t * hval_id, uint32_t * hval_name)
|
|
{
|
|
switch (e->id_info.id_type) {
|
|
case IDMAP_TYPE_UID:
|
|
*hval_id = e->id_info.id_id.uid % IDMAP_HASH_SIZE;
|
|
break;
|
|
case IDMAP_TYPE_GID:
|
|
*hval_id = e->id_info.id_id.gid % IDMAP_HASH_SIZE;
|
|
break;
|
|
default:
|
|
/* XXX yikes! */
|
|
panic("hashf: bad type!");
|
|
break;
|
|
}
|
|
|
|
if (e->id_info.id_namelen == 0)
|
|
/* XXX */ panic("hashf: bad name");
|
|
|
|
*hval_name = fnv_32_str(e->id_info.id_name, FNV1_32_INIT) % IDMAP_HASH_SIZE;
|
|
}
|
|
|
|
static int
|
|
idmap_add(struct idmap_entry * e)
|
|
{
|
|
struct idmap_hash * hash;
|
|
uint32_t hval_id, hval_name;
|
|
|
|
if (e->id_info.id_namelen == 0) {
|
|
printf("idmap_add: name of len 0\n");
|
|
return EINVAL;
|
|
}
|
|
|
|
switch (e->id_info.id_type) {
|
|
case IDMAP_TYPE_UID:
|
|
hash = &idmap_uid_hash;
|
|
break;
|
|
case IDMAP_TYPE_GID:
|
|
hash = &idmap_gid_hash;
|
|
break;
|
|
default:
|
|
/* XXX yikes */
|
|
panic("idmap add: bad type!");
|
|
break;
|
|
}
|
|
|
|
idmap_hashf(e, &hval_id, &hval_name);
|
|
|
|
IDMAP_WLOCK(&hash->hash_lock);
|
|
|
|
TAILQ_INSERT_TAIL(&hash->hash_id[hval_id], e, id_entry_id);
|
|
TAILQ_INSERT_TAIL(&hash->hash_name[hval_name], e, id_entry_name);
|
|
|
|
IDMAP_UNLOCK(&hash->hash_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct idmap_entry *
|
|
idmap_id_lookup(uint32_t type, ident_t id)
|
|
{
|
|
struct idmap_hash * hash;
|
|
uint32_t hval;
|
|
struct idmap_entry * e;
|
|
|
|
switch (type) {
|
|
case IDMAP_TYPE_UID:
|
|
hash = &idmap_uid_hash;
|
|
hval = id.uid % IDMAP_HASH_SIZE;
|
|
break;
|
|
case IDMAP_TYPE_GID:
|
|
hash = &idmap_gid_hash;
|
|
hval = id.gid % IDMAP_HASH_SIZE;
|
|
break;
|
|
default:
|
|
/* XXX yikes */
|
|
panic("lookup: bad type!");
|
|
break;
|
|
}
|
|
|
|
|
|
IDMAP_RLOCK(&hash->hash_lock);
|
|
|
|
TAILQ_FOREACH(e, &hash->hash_id[hval], id_entry_name) {
|
|
if ((type == IDMAP_TYPE_UID && e->id_info.id_id.uid == id.uid)||
|
|
(type == IDMAP_TYPE_GID && e->id_info.id_id.gid == id.gid)) {
|
|
IDMAP_UNLOCK(&hash->hash_lock);
|
|
return e;
|
|
}
|
|
}
|
|
|
|
IDMAP_UNLOCK(&hash->hash_lock);
|
|
return NULL;
|
|
}
|
|
|
|
static struct idmap_entry *
|
|
idmap_name_lookup(uint32_t type, char * name)
|
|
{
|
|
struct idmap_hash * hash;
|
|
uint32_t hval;
|
|
struct idmap_entry * e;
|
|
size_t len;
|
|
|
|
switch (type) {
|
|
case IDMAP_TYPE_UID:
|
|
hash = &idmap_uid_hash;
|
|
break;
|
|
case IDMAP_TYPE_GID:
|
|
hash = &idmap_gid_hash;
|
|
break;
|
|
default:
|
|
/* XXX yikes */
|
|
panic("lookup: bad type!");
|
|
break;
|
|
}
|
|
|
|
len = strlen(name);
|
|
|
|
if (len == 0 || len > IDMAP_MAXNAMELEN) {
|
|
IDMAP_DEBUG("bad name length %d\n", len);
|
|
return NULL;
|
|
}
|
|
|
|
hval = fnv_32_str(name, FNV1_32_INIT) % IDMAP_HASH_SIZE;
|
|
|
|
IDMAP_RLOCK(&hash->hash_lock);
|
|
|
|
TAILQ_FOREACH(e, &hash->hash_name[hval], id_entry_name) {
|
|
if ((strlen(e->id_info.id_name) == strlen(name)) && strncmp(e->id_info.id_name, name, strlen(name)) == 0) {
|
|
IDMAP_UNLOCK(&hash->hash_lock);
|
|
return e;
|
|
}
|
|
}
|
|
|
|
IDMAP_UNLOCK(&hash->hash_lock);
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
idmap_init(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i=0; i<IDMAP_HASH_SIZE; i++) {
|
|
TAILQ_INIT(&idmap_uid_hash.hash_name[i]);
|
|
TAILQ_INIT(&idmap_uid_hash.hash_id[i]);
|
|
|
|
TAILQ_INIT(&idmap_gid_hash.hash_name[i]);
|
|
TAILQ_INIT(&idmap_gid_hash.hash_id[i]);
|
|
}
|
|
|
|
lockinit(&idmap_uid_hash.hash_lock, PLOCK, "idmap uid hash table", 0,0);
|
|
lockinit(&idmap_gid_hash.hash_lock, PLOCK, "idmap gid hash table", 0,0);
|
|
|
|
}
|
|
|
|
void idmap_uninit(void)
|
|
{
|
|
struct idmap_entry * e;
|
|
int i;
|
|
|
|
lockdestroy(&idmap_uid_hash.hash_lock);
|
|
lockdestroy(&idmap_gid_hash.hash_lock);
|
|
|
|
for (i=0; i<IDMAP_HASH_SIZE; i++) {
|
|
while(!TAILQ_EMPTY(&idmap_uid_hash.hash_name[i])) {
|
|
e = TAILQ_FIRST(&idmap_uid_hash.hash_name[i]);
|
|
TAILQ_REMOVE(&idmap_uid_hash.hash_name[i], e, id_entry_name);
|
|
TAILQ_REMOVE(&idmap_uid_hash.hash_id[i], e, id_entry_id);
|
|
FREE(e, M_IDMAP);
|
|
}
|
|
|
|
while(!TAILQ_EMPTY(&idmap_gid_hash.hash_name[i])) {
|
|
e = TAILQ_FIRST(&idmap_gid_hash.hash_name[i]);
|
|
TAILQ_REMOVE(&idmap_gid_hash.hash_name[i], e, id_entry_name);
|
|
TAILQ_REMOVE(&idmap_gid_hash.hash_id[i], e, id_entry_id);
|
|
FREE(e, M_IDMAP);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
int
|
|
idmap_uid_to_name(uid_t uid, char ** name, size_t * len)
|
|
{
|
|
struct idmap_entry * e;
|
|
int error = 0;
|
|
ident_t id;
|
|
|
|
id.uid = uid;
|
|
|
|
|
|
if ((e = idmap_id_lookup(IDMAP_TYPE_UID, id)) == NULL) {
|
|
if ((error = idmap_upcall_id(IDMAP_TYPE_UID, id, &e)) != 0) {
|
|
IDMAP_DEBUG("error in upcall\n");
|
|
return error;
|
|
}
|
|
|
|
if (e == NULL) {
|
|
IDMAP_DEBUG("no error from upcall, but no data returned\n");
|
|
return EFAULT;
|
|
}
|
|
|
|
if (idmap_add(e) != 0) {
|
|
IDMAP_DEBUG("idmap_add failed\n");
|
|
FREE(e, M_IDMAP);
|
|
return EFAULT;
|
|
}
|
|
}
|
|
|
|
*name = e->id_info.id_name;
|
|
*len = e->id_info.id_namelen;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
idmap_gid_to_name(gid_t gid, char ** name, size_t * len)
|
|
{
|
|
struct idmap_entry * e;
|
|
int error = 0;
|
|
ident_t id;
|
|
|
|
id.gid = gid;
|
|
|
|
|
|
if ((e = idmap_id_lookup(IDMAP_TYPE_GID, id)) == NULL) {
|
|
if ((error = idmap_upcall_id(IDMAP_TYPE_GID, id, &e))) {
|
|
IDMAP_DEBUG("error in upcall\n");
|
|
return error;
|
|
}
|
|
|
|
if (e == NULL) {
|
|
IDMAP_DEBUG("no error from upcall, but no data returned\n");
|
|
return EFAULT;
|
|
}
|
|
|
|
if (idmap_add(e) != 0) {
|
|
IDMAP_DEBUG("idmap_add failed\n");
|
|
FREE(e, M_IDMAP);
|
|
}
|
|
}
|
|
|
|
*name = e->id_info.id_name;
|
|
*len = e->id_info.id_namelen;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
idmap_name_to_uid(char * name, size_t len, uid_t * id)
|
|
{
|
|
struct idmap_entry * e;
|
|
int error = 0;
|
|
char * namestr;
|
|
|
|
if (name == NULL )
|
|
return EFAULT;
|
|
|
|
if (len == 0 || len > IDMAP_MAXNAMELEN) {
|
|
IDMAP_DEBUG("idmap_name_to_uid: bad len\n");
|
|
return EINVAL;
|
|
}
|
|
|
|
/* XXX hack */
|
|
MALLOC(namestr, char *, len + 1, M_TEMP, M_WAITOK);
|
|
bcopy(name, namestr, len);
|
|
namestr[len] = '\0';
|
|
|
|
|
|
if ((e = idmap_name_lookup(IDMAP_TYPE_UID, namestr)) == NULL) {
|
|
if ((error = idmap_upcall_name(IDMAP_TYPE_UID, namestr, &e))) {
|
|
FREE(namestr, M_TEMP);
|
|
return error;
|
|
}
|
|
|
|
if (e == NULL) {
|
|
IDMAP_DEBUG("no error from upcall, but no data returned\n");
|
|
FREE(namestr, M_TEMP);
|
|
return EFAULT;
|
|
}
|
|
|
|
if (idmap_add(e) != 0) {
|
|
IDMAP_DEBUG("idmap_add failed\n");
|
|
FREE(e, M_IDMAP);
|
|
}
|
|
}
|
|
|
|
*id = e->id_info.id_id.uid;
|
|
FREE(namestr, M_TEMP);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
idmap_name_to_gid(char * name, size_t len, gid_t * id)
|
|
{
|
|
struct idmap_entry * e;
|
|
int error = 0;
|
|
|
|
char * namestr;
|
|
|
|
if (name == NULL )
|
|
return EFAULT;
|
|
|
|
if (len == 0 || len > IDMAP_MAXNAMELEN) {
|
|
IDMAP_DEBUG("idmap_name_to_uid: bad len\n");
|
|
return EINVAL;
|
|
}
|
|
|
|
/* XXX hack */
|
|
MALLOC(namestr, char *, len + 1, M_TEMP, M_WAITOK);
|
|
bcopy(name, namestr, len);
|
|
namestr[len] = '\0';
|
|
|
|
|
|
if ((e = idmap_name_lookup(IDMAP_TYPE_GID, namestr)) == NULL) {
|
|
if ((error = idmap_upcall_name(IDMAP_TYPE_GID, namestr, &e)) != 0) {
|
|
IDMAP_DEBUG("error in upcall\n");
|
|
FREE(namestr, M_TEMP);
|
|
return error;
|
|
}
|
|
|
|
if (e == NULL) {
|
|
IDMAP_DEBUG("no error from upcall, but no data returned\n");
|
|
FREE(namestr, M_TEMP);
|
|
return EFAULT;
|
|
}
|
|
|
|
if (idmap_add(e) != 0) {
|
|
IDMAP_DEBUG("idmap_add failed\n");
|
|
FREE(e, M_IDMAP);
|
|
}
|
|
}
|
|
|
|
*id = e->id_info.id_id.gid;
|
|
FREE(namestr, M_TEMP);
|
|
return 0;
|
|
}
|