10Sstevel@tonic-gate /*
20Sstevel@tonic-gate * CDDL HEADER START
30Sstevel@tonic-gate *
40Sstevel@tonic-gate * The contents of this file are subject to the terms of the
52140Srmesta * Common Development and Distribution License (the "License").
62140Srmesta * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate *
80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate * See the License for the specific language governing permissions
110Sstevel@tonic-gate * and limitations under the License.
120Sstevel@tonic-gate *
130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate *
190Sstevel@tonic-gate * CDDL HEADER END
200Sstevel@tonic-gate */
210Sstevel@tonic-gate /*
2212081SThomas.Haynes@Sun.COM * Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
230Sstevel@tonic-gate */
240Sstevel@tonic-gate
250Sstevel@tonic-gate #include <sys/param.h>
260Sstevel@tonic-gate #include <sys/errno.h>
270Sstevel@tonic-gate #include <sys/vfs.h>
280Sstevel@tonic-gate #include <sys/vnode.h>
290Sstevel@tonic-gate #include <sys/cred.h>
300Sstevel@tonic-gate #include <sys/cmn_err.h>
310Sstevel@tonic-gate #include <sys/systm.h>
320Sstevel@tonic-gate #include <sys/kmem.h>
330Sstevel@tonic-gate #include <sys/pathname.h>
340Sstevel@tonic-gate #include <sys/utsname.h>
350Sstevel@tonic-gate #include <sys/debug.h>
362140Srmesta #include <sys/door.h>
372140Srmesta #include <sys/sdt.h>
3812081SThomas.Haynes@Sun.COM #include <sys/thread.h>
390Sstevel@tonic-gate
400Sstevel@tonic-gate #include <rpc/types.h>
410Sstevel@tonic-gate #include <rpc/auth.h>
420Sstevel@tonic-gate #include <rpc/clnt.h>
430Sstevel@tonic-gate
440Sstevel@tonic-gate #include <nfs/nfs.h>
450Sstevel@tonic-gate #include <nfs/export.h>
460Sstevel@tonic-gate #include <nfs/nfs_clnt.h>
472140Srmesta #include <nfs/auth.h>
480Sstevel@tonic-gate
490Sstevel@tonic-gate #define EQADDR(a1, a2) \
500Sstevel@tonic-gate (bcmp((char *)(a1)->buf, (char *)(a2)->buf, (a1)->len) == 0 && \
510Sstevel@tonic-gate (a1)->len == (a2)->len)
520Sstevel@tonic-gate
530Sstevel@tonic-gate static struct knetconfig auth_knconf;
540Sstevel@tonic-gate static servinfo_t svp;
550Sstevel@tonic-gate static clinfo_t ci;
560Sstevel@tonic-gate
570Sstevel@tonic-gate static struct kmem_cache *exi_cache_handle;
580Sstevel@tonic-gate static void exi_cache_reclaim(void *);
590Sstevel@tonic-gate static void exi_cache_trim(struct exportinfo *exi);
600Sstevel@tonic-gate
6112081SThomas.Haynes@Sun.COM extern pri_t minclsyspri;
6212081SThomas.Haynes@Sun.COM
630Sstevel@tonic-gate int nfsauth_cache_hit;
640Sstevel@tonic-gate int nfsauth_cache_miss;
6512081SThomas.Haynes@Sun.COM int nfsauth_cache_refresh;
660Sstevel@tonic-gate int nfsauth_cache_reclaim;
670Sstevel@tonic-gate
680Sstevel@tonic-gate /*
6912081SThomas.Haynes@Sun.COM * The lifetime of an auth cache entry:
7012081SThomas.Haynes@Sun.COM * ------------------------------------
7112081SThomas.Haynes@Sun.COM *
7212081SThomas.Haynes@Sun.COM * An auth cache entry is created with both the auth_time
7312081SThomas.Haynes@Sun.COM * and auth_freshness times set to the current time.
7412081SThomas.Haynes@Sun.COM *
7512081SThomas.Haynes@Sun.COM * Upon every client access which results in a hit, the
7612081SThomas.Haynes@Sun.COM * auth_time will be updated.
7712081SThomas.Haynes@Sun.COM *
7812081SThomas.Haynes@Sun.COM * If a client access determines that the auth_freshness
7912081SThomas.Haynes@Sun.COM * indicates that the entry is STALE, then it will be
8012081SThomas.Haynes@Sun.COM * refreshed. Note that this will explicitly reset
8112081SThomas.Haynes@Sun.COM * auth_time.
8212081SThomas.Haynes@Sun.COM *
8312081SThomas.Haynes@Sun.COM * When the REFRESH successfully occurs, then the
8412081SThomas.Haynes@Sun.COM * auth_freshness is updated.
8512081SThomas.Haynes@Sun.COM *
8612081SThomas.Haynes@Sun.COM * There are two ways for an entry to leave the cache:
8712081SThomas.Haynes@Sun.COM *
8812081SThomas.Haynes@Sun.COM * 1) Purged by an action on the export (remove or changed)
8912081SThomas.Haynes@Sun.COM * 2) Memory backpressure from the kernel (check against NFSAUTH_CACHE_TRIM)
9012081SThomas.Haynes@Sun.COM *
9112081SThomas.Haynes@Sun.COM * For 2) we check the timeout value against auth_time.
9212081SThomas.Haynes@Sun.COM */
9312081SThomas.Haynes@Sun.COM
9412081SThomas.Haynes@Sun.COM /*
9512081SThomas.Haynes@Sun.COM * Number of seconds until we mark for refresh an auth cache entry.
9612081SThomas.Haynes@Sun.COM */
9712081SThomas.Haynes@Sun.COM #define NFSAUTH_CACHE_REFRESH 600
9812081SThomas.Haynes@Sun.COM
9912081SThomas.Haynes@Sun.COM /*
10012081SThomas.Haynes@Sun.COM * Number of idle seconds until we yield to backpressure
10112081SThomas.Haynes@Sun.COM * to trim a cache entry.
10212081SThomas.Haynes@Sun.COM */
10312081SThomas.Haynes@Sun.COM #define NFSAUTH_CACHE_TRIM 3600
10412081SThomas.Haynes@Sun.COM
10512081SThomas.Haynes@Sun.COM /*
10612081SThomas.Haynes@Sun.COM * While we could encapuslate the exi_list inside the
10712081SThomas.Haynes@Sun.COM * exi structure, we can't do that for the auth_list.
10812081SThomas.Haynes@Sun.COM * So, to keep things looking clean, we keep them both
10912081SThomas.Haynes@Sun.COM * in these external lists.
1100Sstevel@tonic-gate */
11112081SThomas.Haynes@Sun.COM typedef struct refreshq_exi_node {
11212081SThomas.Haynes@Sun.COM struct exportinfo *ren_exi;
11312081SThomas.Haynes@Sun.COM list_t ren_authlist;
11412081SThomas.Haynes@Sun.COM list_node_t ren_node;
11512081SThomas.Haynes@Sun.COM } refreshq_exi_node_t;
11612081SThomas.Haynes@Sun.COM
11712081SThomas.Haynes@Sun.COM typedef struct refreshq_auth_node {
11812081SThomas.Haynes@Sun.COM struct auth_cache *ran_auth;
11912081SThomas.Haynes@Sun.COM list_node_t ran_node;
12012081SThomas.Haynes@Sun.COM } refreshq_auth_node_t;
12112081SThomas.Haynes@Sun.COM
12212081SThomas.Haynes@Sun.COM /*
12312081SThomas.Haynes@Sun.COM * Used to manipulate things on the refreshq_queue.
12412081SThomas.Haynes@Sun.COM * Note that the refresh thread will effectively
12512081SThomas.Haynes@Sun.COM * pop a node off of the queue, at which point it
12612081SThomas.Haynes@Sun.COM * will no longer need to hold the mutex.
12712081SThomas.Haynes@Sun.COM */
12812081SThomas.Haynes@Sun.COM static kmutex_t refreshq_lock;
12912081SThomas.Haynes@Sun.COM static list_t refreshq_queue;
13012081SThomas.Haynes@Sun.COM static kcondvar_t refreshq_cv;
13112081SThomas.Haynes@Sun.COM
13212081SThomas.Haynes@Sun.COM /*
13312081SThomas.Haynes@Sun.COM * A list_t would be overkill. These are auth_cache
13412081SThomas.Haynes@Sun.COM * entries which are no longer linked to an exi.
13512081SThomas.Haynes@Sun.COM * It should be the case that all of their states
13612081SThomas.Haynes@Sun.COM * are NFS_AUTH_INVALID.
13712081SThomas.Haynes@Sun.COM *
13812081SThomas.Haynes@Sun.COM * I.e., the only way to be put on this list is
13912081SThomas.Haynes@Sun.COM * iff their state indicated that they had been placed
14012081SThomas.Haynes@Sun.COM * on the refreshq_queue.
14112081SThomas.Haynes@Sun.COM *
14212081SThomas.Haynes@Sun.COM * Note that while there is no link from the exi or
14312081SThomas.Haynes@Sun.COM * back to the exi, the exi can not go away until
14412081SThomas.Haynes@Sun.COM * these entries are harvested.
14512081SThomas.Haynes@Sun.COM */
14612081SThomas.Haynes@Sun.COM static struct auth_cache *refreshq_dead_entries;
14712081SThomas.Haynes@Sun.COM
14812081SThomas.Haynes@Sun.COM /*
14912081SThomas.Haynes@Sun.COM * If there is ever a problem with loading the
15012081SThomas.Haynes@Sun.COM * module, then nfsauth_fini() needs to be called
15112081SThomas.Haynes@Sun.COM * to remove state. In that event, since the
15212081SThomas.Haynes@Sun.COM * refreshq thread has been started, they need to
15312081SThomas.Haynes@Sun.COM * work together to get rid of state.
15412081SThomas.Haynes@Sun.COM */
15512081SThomas.Haynes@Sun.COM typedef enum nfsauth_refreshq_thread_state {
15612081SThomas.Haynes@Sun.COM REFRESHQ_THREAD_RUNNING,
15712081SThomas.Haynes@Sun.COM REFRESHQ_THREAD_FINI_REQ,
15812081SThomas.Haynes@Sun.COM REFRESHQ_THREAD_HALTED
15912081SThomas.Haynes@Sun.COM } nfsauth_refreshq_thread_state_t;
16012081SThomas.Haynes@Sun.COM
16112081SThomas.Haynes@Sun.COM nfsauth_refreshq_thread_state_t
16212081SThomas.Haynes@Sun.COM refreshq_thread_state = REFRESHQ_THREAD_HALTED;
16312081SThomas.Haynes@Sun.COM
16412081SThomas.Haynes@Sun.COM static void nfsauth_free_node(struct auth_cache *);
16512081SThomas.Haynes@Sun.COM static void nfsauth_remove_dead_entry(struct auth_cache *);
16612081SThomas.Haynes@Sun.COM static void nfsauth_refresh_thread(void);
1670Sstevel@tonic-gate
1682140Srmesta /*
1692140Srmesta * mountd is a server-side only daemon. This will need to be
1702140Srmesta * revisited if the NFS server is ever made zones-aware.
1712140Srmesta */
1722140Srmesta kmutex_t mountd_lock;
1732140Srmesta door_handle_t mountd_dh;
1742140Srmesta
1752140Srmesta void
mountd_args(uint_t did)1762140Srmesta mountd_args(uint_t did)
1772140Srmesta {
1782140Srmesta mutex_enter(&mountd_lock);
1792140Srmesta if (mountd_dh)
1802140Srmesta door_ki_rele(mountd_dh);
1812140Srmesta mountd_dh = door_ki_lookup(did);
1822140Srmesta mutex_exit(&mountd_lock);
1832140Srmesta }
1842140Srmesta
1850Sstevel@tonic-gate void
nfsauth_init(void)1860Sstevel@tonic-gate nfsauth_init(void)
1870Sstevel@tonic-gate {
1880Sstevel@tonic-gate /*
1892140Srmesta * mountd can be restarted by smf(5). We need to make sure
1902140Srmesta * the updated door handle will safely make it to mountd_dh
1910Sstevel@tonic-gate */
1922140Srmesta mutex_init(&mountd_lock, NULL, MUTEX_DEFAULT, NULL);
1930Sstevel@tonic-gate
19412081SThomas.Haynes@Sun.COM mutex_init(&refreshq_lock, NULL, MUTEX_DEFAULT, NULL);
19512081SThomas.Haynes@Sun.COM list_create(&refreshq_queue, sizeof (refreshq_exi_node_t),
19612081SThomas.Haynes@Sun.COM offsetof(refreshq_exi_node_t, ren_node));
19712081SThomas.Haynes@Sun.COM refreshq_dead_entries = NULL;
19812081SThomas.Haynes@Sun.COM
19912081SThomas.Haynes@Sun.COM cv_init(&refreshq_cv, NULL, CV_DEFAULT, NULL);
20012081SThomas.Haynes@Sun.COM
2010Sstevel@tonic-gate /*
2020Sstevel@tonic-gate * Allocate nfsauth cache handle
2030Sstevel@tonic-gate */
2040Sstevel@tonic-gate exi_cache_handle = kmem_cache_create("exi_cache_handle",
2057961SNatalie.Li@Sun.COM sizeof (struct auth_cache), 0, NULL, NULL,
2067961SNatalie.Li@Sun.COM exi_cache_reclaim, NULL, NULL, 0);
20712081SThomas.Haynes@Sun.COM
20812081SThomas.Haynes@Sun.COM refreshq_thread_state = REFRESHQ_THREAD_RUNNING;
20912081SThomas.Haynes@Sun.COM (void) zthread_create(NULL, 0, nfsauth_refresh_thread,
21012081SThomas.Haynes@Sun.COM NULL, 0, minclsyspri);
2110Sstevel@tonic-gate }
2120Sstevel@tonic-gate
2130Sstevel@tonic-gate /*
2140Sstevel@tonic-gate * Finalization routine for nfsauth. It is important to call this routine
2150Sstevel@tonic-gate * before destroying the exported_lock.
2160Sstevel@tonic-gate */
2170Sstevel@tonic-gate void
nfsauth_fini(void)2180Sstevel@tonic-gate nfsauth_fini(void)
2190Sstevel@tonic-gate {
22012081SThomas.Haynes@Sun.COM refreshq_exi_node_t *ren;
22112081SThomas.Haynes@Sun.COM refreshq_auth_node_t *ran;
22212081SThomas.Haynes@Sun.COM struct auth_cache *p;
22312081SThomas.Haynes@Sun.COM struct auth_cache *auth_next;
22412081SThomas.Haynes@Sun.COM
22512081SThomas.Haynes@Sun.COM /*
22612081SThomas.Haynes@Sun.COM * Prevent the refreshq_thread from getting new
22712081SThomas.Haynes@Sun.COM * work.
22812081SThomas.Haynes@Sun.COM */
22912081SThomas.Haynes@Sun.COM mutex_enter(&refreshq_lock);
23012081SThomas.Haynes@Sun.COM if (refreshq_thread_state != REFRESHQ_THREAD_HALTED) {
23112081SThomas.Haynes@Sun.COM refreshq_thread_state = REFRESHQ_THREAD_FINI_REQ;
23212081SThomas.Haynes@Sun.COM cv_broadcast(&refreshq_cv);
23312081SThomas.Haynes@Sun.COM
23412081SThomas.Haynes@Sun.COM /*
23512081SThomas.Haynes@Sun.COM * Also, wait for nfsauth_refresh_thread() to exit.
23612081SThomas.Haynes@Sun.COM */
23712081SThomas.Haynes@Sun.COM while (refreshq_thread_state != REFRESHQ_THREAD_HALTED) {
23812081SThomas.Haynes@Sun.COM cv_wait(&refreshq_cv, &refreshq_lock);
23912081SThomas.Haynes@Sun.COM }
24012081SThomas.Haynes@Sun.COM }
24112081SThomas.Haynes@Sun.COM
24212081SThomas.Haynes@Sun.COM /*
24312081SThomas.Haynes@Sun.COM * Walk the exi_list and in turn, walk the
24412081SThomas.Haynes@Sun.COM * auth_lists.
24512081SThomas.Haynes@Sun.COM */
24612081SThomas.Haynes@Sun.COM while ((ren = list_remove_head(&refreshq_queue))) {
24712081SThomas.Haynes@Sun.COM while ((ran = list_remove_head(&ren->ren_authlist))) {
24812081SThomas.Haynes@Sun.COM kmem_free(ran, sizeof (refreshq_auth_node_t));
24912081SThomas.Haynes@Sun.COM }
25012081SThomas.Haynes@Sun.COM
25112081SThomas.Haynes@Sun.COM list_destroy(&ren->ren_authlist);
25212081SThomas.Haynes@Sun.COM exi_rele(ren->ren_exi);
25312081SThomas.Haynes@Sun.COM kmem_free(ren, sizeof (refreshq_exi_node_t));
25412081SThomas.Haynes@Sun.COM }
25512081SThomas.Haynes@Sun.COM
25612081SThomas.Haynes@Sun.COM /*
25712081SThomas.Haynes@Sun.COM * Okay, now that the lists are deleted, we
25812081SThomas.Haynes@Sun.COM * need to see if there are any dead entries
25912081SThomas.Haynes@Sun.COM * to harvest.
26012081SThomas.Haynes@Sun.COM */
26112081SThomas.Haynes@Sun.COM for (p = refreshq_dead_entries; p != NULL; p = auth_next) {
26212081SThomas.Haynes@Sun.COM auth_next = p->auth_next;
26312081SThomas.Haynes@Sun.COM nfsauth_free_node(p);
26412081SThomas.Haynes@Sun.COM }
26512081SThomas.Haynes@Sun.COM
26612081SThomas.Haynes@Sun.COM mutex_exit(&refreshq_lock);
26712081SThomas.Haynes@Sun.COM
26812081SThomas.Haynes@Sun.COM list_destroy(&refreshq_queue);
26912081SThomas.Haynes@Sun.COM
27012081SThomas.Haynes@Sun.COM cv_destroy(&refreshq_cv);
27112081SThomas.Haynes@Sun.COM mutex_destroy(&refreshq_lock);
27212081SThomas.Haynes@Sun.COM
27312081SThomas.Haynes@Sun.COM mutex_destroy(&mountd_lock);
27412081SThomas.Haynes@Sun.COM
2750Sstevel@tonic-gate /*
2760Sstevel@tonic-gate * Deallocate nfsauth cache handle
2770Sstevel@tonic-gate */
2780Sstevel@tonic-gate kmem_cache_destroy(exi_cache_handle);
2790Sstevel@tonic-gate }
2800Sstevel@tonic-gate
2810Sstevel@tonic-gate /*
2820Sstevel@tonic-gate * Convert the address in a netbuf to
2830Sstevel@tonic-gate * a hash index for the auth_cache table.
2840Sstevel@tonic-gate */
2850Sstevel@tonic-gate static int
hash(struct netbuf * a)2860Sstevel@tonic-gate hash(struct netbuf *a)
2870Sstevel@tonic-gate {
2880Sstevel@tonic-gate int i, h = 0;
2890Sstevel@tonic-gate
2900Sstevel@tonic-gate for (i = 0; i < a->len; i++)
2910Sstevel@tonic-gate h ^= a->buf[i];
2920Sstevel@tonic-gate
2930Sstevel@tonic-gate return (h & (AUTH_TABLESIZE - 1));
2940Sstevel@tonic-gate }
2950Sstevel@tonic-gate
2960Sstevel@tonic-gate /*
2970Sstevel@tonic-gate * Mask out the components of an
2980Sstevel@tonic-gate * address that do not identify
2990Sstevel@tonic-gate * a host. For socket addresses the
3000Sstevel@tonic-gate * masking gets rid of the port number.
3010Sstevel@tonic-gate */
3020Sstevel@tonic-gate static void
addrmask(struct netbuf * addr,struct netbuf * mask)3030Sstevel@tonic-gate addrmask(struct netbuf *addr, struct netbuf *mask)
3040Sstevel@tonic-gate {
3050Sstevel@tonic-gate int i;
3060Sstevel@tonic-gate
3070Sstevel@tonic-gate for (i = 0; i < addr->len; i++)
3080Sstevel@tonic-gate addr->buf[i] &= mask->buf[i];
3090Sstevel@tonic-gate }
3100Sstevel@tonic-gate
3110Sstevel@tonic-gate /*
3120Sstevel@tonic-gate * nfsauth4_access is used for NFS V4 auth checking. Besides doing
3130Sstevel@tonic-gate * the common nfsauth_access(), it will check if the client can
3140Sstevel@tonic-gate * have a limited access to this vnode even if the security flavor
3150Sstevel@tonic-gate * used does not meet the policy.
3160Sstevel@tonic-gate */
3170Sstevel@tonic-gate int
nfsauth4_access(struct exportinfo * exi,vnode_t * vp,struct svc_req * req)3180Sstevel@tonic-gate nfsauth4_access(struct exportinfo *exi, vnode_t *vp, struct svc_req *req)
3190Sstevel@tonic-gate {
3200Sstevel@tonic-gate int access;
3210Sstevel@tonic-gate
3220Sstevel@tonic-gate access = nfsauth_access(exi, req);
3230Sstevel@tonic-gate
3240Sstevel@tonic-gate /*
3250Sstevel@tonic-gate * There are cases that the server needs to allow the client
3260Sstevel@tonic-gate * to have a limited view.
3270Sstevel@tonic-gate *
3280Sstevel@tonic-gate * e.g.
3290Sstevel@tonic-gate * /export is shared as "sec=sys,rw=dfs-test-4,sec=krb5,rw"
3300Sstevel@tonic-gate * /export/home is shared as "sec=sys,rw"
3310Sstevel@tonic-gate *
3320Sstevel@tonic-gate * When the client mounts /export with sec=sys, the client
3330Sstevel@tonic-gate * would get a limited view with RO access on /export to see
3340Sstevel@tonic-gate * "home" only because the client is allowed to access
3350Sstevel@tonic-gate * /export/home with auth_sys.
3360Sstevel@tonic-gate */
3370Sstevel@tonic-gate if (access & NFSAUTH_DENIED || access & NFSAUTH_WRONGSEC) {
3380Sstevel@tonic-gate /*
3390Sstevel@tonic-gate * Allow ro permission with LIMITED view if there is a
3400Sstevel@tonic-gate * sub-dir exported under vp.
3410Sstevel@tonic-gate */
3427961SNatalie.Li@Sun.COM if (has_visible(exi, vp))
3430Sstevel@tonic-gate return (NFSAUTH_LIMITED);
3440Sstevel@tonic-gate }
3450Sstevel@tonic-gate
3460Sstevel@tonic-gate return (access);
3470Sstevel@tonic-gate }
3480Sstevel@tonic-gate
3492140Srmesta static void
sys_log(const char * msg)3502140Srmesta sys_log(const char *msg)
3512140Srmesta {
3522140Srmesta static time_t tstamp = 0;
3532140Srmesta time_t now;
3542140Srmesta
3552140Srmesta /*
3562140Srmesta * msg is shown (at most) once per minute
3572140Srmesta */
3582140Srmesta now = gethrestime_sec();
3592140Srmesta if ((tstamp + 60) < now) {
3602140Srmesta tstamp = now;
3612140Srmesta cmn_err(CE_WARN, msg);
3622140Srmesta }
3632140Srmesta }
3642140Srmesta
3650Sstevel@tonic-gate /*
36612081SThomas.Haynes@Sun.COM * Callup to the mountd to get access information in the kernel.
3670Sstevel@tonic-gate */
36812081SThomas.Haynes@Sun.COM static bool_t
nfsauth_retrieve(struct exportinfo * exi,char * req_netid,int flavor,struct netbuf * addr,int * access)36912081SThomas.Haynes@Sun.COM nfsauth_retrieve(struct exportinfo *exi, char *req_netid, int flavor,
37012081SThomas.Haynes@Sun.COM struct netbuf *addr, int *access)
3710Sstevel@tonic-gate {
3722140Srmesta varg_t varg = {0};
3732140Srmesta nfsauth_res_t res = {0};
3742140Srmesta XDR xdrs_a;
3752140Srmesta XDR xdrs_r;
3762140Srmesta size_t absz;
3772140Srmesta caddr_t abuf;
3782140Srmesta size_t rbsz = (size_t)(BYTES_PER_XDR_UNIT * 2);
3792140Srmesta char result[BYTES_PER_XDR_UNIT * 2] = {0};
3802140Srmesta caddr_t rbuf = (caddr_t)&result;
3812140Srmesta int last = 0;
3822140Srmesta door_arg_t da;
3832140Srmesta door_info_t di;
3842140Srmesta door_handle_t dh;
3852140Srmesta uint_t ntries = 0;
3860Sstevel@tonic-gate
3870Sstevel@tonic-gate /*
3880Sstevel@tonic-gate * No entry in the cache for this client/flavor
3890Sstevel@tonic-gate * so we need to call the nfsauth service in the
3900Sstevel@tonic-gate * mount daemon.
3910Sstevel@tonic-gate */
3922140Srmesta retry:
3932140Srmesta mutex_enter(&mountd_lock);
3942140Srmesta dh = mountd_dh;
3952140Srmesta if (dh)
3962140Srmesta door_ki_hold(dh);
3972140Srmesta mutex_exit(&mountd_lock);
3980Sstevel@tonic-gate
3992140Srmesta if (dh == NULL) {
4002140Srmesta /*
4012140Srmesta * The rendezvous point has not been established yet !
4022140Srmesta * This could mean that either mountd(1m) has not yet
4032140Srmesta * been started or that _this_ routine nuked the door
4042140Srmesta * handle after receiving an EINTR for a REVOKED door.
4052140Srmesta *
4062140Srmesta * Returning NFSAUTH_DROP will cause the NFS client
4072140Srmesta * to retransmit the request, so let's try to be more
4082140Srmesta * rescillient and attempt for ntries before we bail.
4092140Srmesta */
4102140Srmesta if (++ntries % NFSAUTH_DR_TRYCNT) {
4112140Srmesta delay(hz);
4122140Srmesta goto retry;
4132140Srmesta }
41412081SThomas.Haynes@Sun.COM
4152140Srmesta sys_log("nfsauth: mountd has not established door");
41612081SThomas.Haynes@Sun.COM *access = NFSAUTH_DROP;
41712081SThomas.Haynes@Sun.COM return (FALSE);
4180Sstevel@tonic-gate }
41912081SThomas.Haynes@Sun.COM
4202140Srmesta ntries = 0;
4212140Srmesta varg.vers = V_PROTO;
4222140Srmesta varg.arg_u.arg.cmd = NFSAUTH_ACCESS;
42312081SThomas.Haynes@Sun.COM varg.arg_u.arg.areq.req_client.n_len = addr->len;
42412081SThomas.Haynes@Sun.COM varg.arg_u.arg.areq.req_client.n_bytes = addr->buf;
42512081SThomas.Haynes@Sun.COM varg.arg_u.arg.areq.req_netid = req_netid;
4262140Srmesta varg.arg_u.arg.areq.req_path = exi->exi_export.ex_path;
4272140Srmesta varg.arg_u.arg.areq.req_flavor = flavor;
4280Sstevel@tonic-gate
4292140Srmesta /*
4302140Srmesta * Setup the XDR stream for encoding the arguments. Notice that
4312140Srmesta * in addition to the args having variable fields (req_netid and
4322140Srmesta * req_path), the argument data structure is itself versioned,
4332140Srmesta * so we need to make sure we can size the arguments buffer
4342140Srmesta * appropriately to encode all the args. If we can't get sizing
4352140Srmesta * info _or_ properly encode the arguments, there's really no
4362140Srmesta * point in continuting, so we fail the request.
4372140Srmesta */
4382140Srmesta DTRACE_PROBE1(nfsserv__func__nfsauth__varg, varg_t *, &varg);
4392140Srmesta if ((absz = xdr_sizeof(xdr_varg, (void *)&varg)) == 0) {
4402140Srmesta door_ki_rele(dh);
44112081SThomas.Haynes@Sun.COM *access = NFSAUTH_DENIED;
44212081SThomas.Haynes@Sun.COM return (FALSE);
4432140Srmesta }
44412081SThomas.Haynes@Sun.COM
4452140Srmesta abuf = (caddr_t)kmem_alloc(absz, KM_SLEEP);
4462140Srmesta xdrmem_create(&xdrs_a, abuf, absz, XDR_ENCODE);
4472140Srmesta if (!xdr_varg(&xdrs_a, &varg)) {
4482140Srmesta door_ki_rele(dh);
4492140Srmesta goto fail;
4502140Srmesta }
4512140Srmesta XDR_DESTROY(&xdrs_a);
4520Sstevel@tonic-gate
4532140Srmesta /*
4542140Srmesta * The result (nfsauth_res_t) is always two int's, so we don't
4552140Srmesta * have to dynamically size (or allocate) the results buffer.
4562140Srmesta * Now that we've got what we need, we prep the door arguments
4572140Srmesta * and place the call.
4582140Srmesta */
4592140Srmesta da.data_ptr = (char *)abuf;
4602140Srmesta da.data_size = absz;
4612140Srmesta da.desc_ptr = NULL;
4622140Srmesta da.desc_num = 0;
4632140Srmesta da.rbuf = (char *)rbuf;
4642140Srmesta da.rsize = rbsz;
4650Sstevel@tonic-gate
4666997Sjwadams switch (door_ki_upcall_limited(dh, &da, NULL, SIZE_MAX, 0)) {
4672140Srmesta case 0: /* Success */
4682140Srmesta if (da.data_ptr != da.rbuf && da.data_size == 0) {
4692140Srmesta /*
4702140Srmesta * The door_return that contained the data
4712140Srmesta * failed ! We're here because of the 2nd
4722140Srmesta * door_return (w/o data) such that we can
4732140Srmesta * get control of the thread (and exit
4742140Srmesta * gracefully).
4752140Srmesta */
4762140Srmesta DTRACE_PROBE1(nfsserv__func__nfsauth__door__nil,
4772140Srmesta door_arg_t *, &da);
4782140Srmesta door_ki_rele(dh);
4792140Srmesta goto fail;
4802140Srmesta
4812140Srmesta } else if (rbuf != da.rbuf) {
4822140Srmesta /*
4832140Srmesta * The only time this should be true
4842140Srmesta * is iff userland wanted to hand us
4852140Srmesta * a bigger response than what we
4862140Srmesta * expect; that should not happen
4872140Srmesta * (nfsauth_res_t is only 2 int's),
4882140Srmesta * but we check nevertheless.
4892140Srmesta */
4902140Srmesta rbuf = da.rbuf;
4912140Srmesta rbsz = da.rsize;
4920Sstevel@tonic-gate
4932140Srmesta } else if (rbsz > da.data_size) {
4942140Srmesta /*
4952140Srmesta * We were expecting two int's; but if
4962140Srmesta * userland fails in encoding the XDR
4972140Srmesta * stream, we detect that here, since
4982140Srmesta * the mountd forces down only one byte
4992140Srmesta * in such scenario.
5002140Srmesta */
5012140Srmesta door_ki_rele(dh);
5022140Srmesta goto fail;
5032140Srmesta }
5042140Srmesta door_ki_rele(dh);
5052140Srmesta break;
5062140Srmesta
5072140Srmesta case EAGAIN:
5082140Srmesta /*
5092140Srmesta * Server out of resources; back off for a bit
5102140Srmesta */
5112140Srmesta door_ki_rele(dh);
5122140Srmesta kmem_free(abuf, absz);
5132140Srmesta delay(hz);
5142140Srmesta goto retry;
5152140Srmesta /* NOTREACHED */
5160Sstevel@tonic-gate
5172140Srmesta case EINTR:
5182140Srmesta if (!door_ki_info(dh, &di)) {
5192140Srmesta if (di.di_attributes & DOOR_REVOKED) {
5202140Srmesta /*
5212140Srmesta * The server barfed and revoked
5222140Srmesta * the (existing) door on us; we
5232140Srmesta * want to wait to give smf(5) a
5242140Srmesta * chance to restart mountd(1m)
5252140Srmesta * and establish a new door handle.
5262140Srmesta */
5272140Srmesta mutex_enter(&mountd_lock);
5282140Srmesta if (dh == mountd_dh)
5292140Srmesta mountd_dh = NULL;
5302140Srmesta mutex_exit(&mountd_lock);
5312140Srmesta door_ki_rele(dh);
5322140Srmesta kmem_free(abuf, absz);
5332140Srmesta delay(hz);
5342140Srmesta goto retry;
5352140Srmesta }
5362140Srmesta /*
5372140Srmesta * If the door was _not_ revoked on us,
5382140Srmesta * then more than likely we took an INTR,
5392140Srmesta * so we need to fail the operation.
5402140Srmesta */
5412140Srmesta door_ki_rele(dh);
5422140Srmesta goto fail;
5432140Srmesta }
5442140Srmesta /*
5452140Srmesta * The only failure that can occur from getting
5462140Srmesta * the door info is EINVAL, so we let the code
5472140Srmesta * below handle it.
5482140Srmesta */
5492140Srmesta /* FALLTHROUGH */
5502140Srmesta
5512140Srmesta case EBADF:
5522140Srmesta case EINVAL:
5532140Srmesta default:
5542140Srmesta /*
5552140Srmesta * If we have a stale door handle, give smf a last
5562140Srmesta * chance to start it by sleeping for a little bit.
5572140Srmesta * If we're still hosed, we'll fail the call.
5582140Srmesta *
5592140Srmesta * Since we're going to reacquire the door handle
5602140Srmesta * upon the retry, we opt to sleep for a bit and
5612140Srmesta * _not_ to clear mountd_dh. If mountd restarted
5622140Srmesta * and was able to set mountd_dh, we should see
5632140Srmesta * the new instance; if not, we won't get caught
5642140Srmesta * up in the retry/DELAY loop.
5652140Srmesta */
5662140Srmesta door_ki_rele(dh);
5672140Srmesta if (!last) {
5682140Srmesta delay(hz);
5692140Srmesta last++;
5702140Srmesta goto retry;
5712140Srmesta }
5722140Srmesta sys_log("nfsauth: stale mountd door handle");
5732140Srmesta goto fail;
5740Sstevel@tonic-gate }
5750Sstevel@tonic-gate
5762140Srmesta /*
5772140Srmesta * No door errors encountered; setup the XDR stream for decoding
5782140Srmesta * the results. If we fail to decode the results, we've got no
5792140Srmesta * other recourse than to fail the request.
5802140Srmesta */
5812140Srmesta xdrmem_create(&xdrs_r, rbuf, rbsz, XDR_DECODE);
5822140Srmesta if (!xdr_nfsauth_res(&xdrs_r, &res))
5832140Srmesta goto fail;
5842140Srmesta XDR_DESTROY(&xdrs_r);
5852140Srmesta
5862140Srmesta DTRACE_PROBE1(nfsserv__func__nfsauth__results, nfsauth_res_t *, &res);
5872140Srmesta switch (res.stat) {
5882140Srmesta case NFSAUTH_DR_OKAY:
58912081SThomas.Haynes@Sun.COM *access = res.ares.auth_perm;
5902140Srmesta kmem_free(abuf, absz);
5912140Srmesta break;
5922140Srmesta
5932140Srmesta case NFSAUTH_DR_EFAIL:
5942140Srmesta case NFSAUTH_DR_DECERR:
5952140Srmesta case NFSAUTH_DR_BADCMD:
5962140Srmesta default:
5972140Srmesta fail:
59812081SThomas.Haynes@Sun.COM *access = NFSAUTH_DENIED;
5992140Srmesta kmem_free(abuf, absz);
60012081SThomas.Haynes@Sun.COM return (FALSE);
6012140Srmesta /* NOTREACHED */
6020Sstevel@tonic-gate }
6030Sstevel@tonic-gate
60412081SThomas.Haynes@Sun.COM return (TRUE);
60512081SThomas.Haynes@Sun.COM }
60612081SThomas.Haynes@Sun.COM
60712081SThomas.Haynes@Sun.COM static void
nfsauth_refresh_thread(void)60812081SThomas.Haynes@Sun.COM nfsauth_refresh_thread(void)
60912081SThomas.Haynes@Sun.COM {
61012081SThomas.Haynes@Sun.COM refreshq_exi_node_t *ren;
61112081SThomas.Haynes@Sun.COM refreshq_auth_node_t *ran;
61212081SThomas.Haynes@Sun.COM
61312081SThomas.Haynes@Sun.COM struct exportinfo *exi;
61412081SThomas.Haynes@Sun.COM struct auth_cache *p;
61512081SThomas.Haynes@Sun.COM
61612081SThomas.Haynes@Sun.COM int access;
61712081SThomas.Haynes@Sun.COM bool_t retrieval;
61812081SThomas.Haynes@Sun.COM
61912081SThomas.Haynes@Sun.COM callb_cpr_t cprinfo;
62012081SThomas.Haynes@Sun.COM
62112081SThomas.Haynes@Sun.COM CALLB_CPR_INIT(&cprinfo, &refreshq_lock, callb_generic_cpr,
62212081SThomas.Haynes@Sun.COM "nfsauth_refresh");
62312081SThomas.Haynes@Sun.COM
62412081SThomas.Haynes@Sun.COM for (;;) {
62512081SThomas.Haynes@Sun.COM mutex_enter(&refreshq_lock);
62612081SThomas.Haynes@Sun.COM if (refreshq_thread_state != REFRESHQ_THREAD_RUNNING) {
62712081SThomas.Haynes@Sun.COM /* Keep the hold on the lock! */
62812081SThomas.Haynes@Sun.COM break;
62912081SThomas.Haynes@Sun.COM }
63012081SThomas.Haynes@Sun.COM
63112081SThomas.Haynes@Sun.COM ren = list_remove_head(&refreshq_queue);
63212081SThomas.Haynes@Sun.COM if (ren == NULL) {
63312081SThomas.Haynes@Sun.COM CALLB_CPR_SAFE_BEGIN(&cprinfo);
63412081SThomas.Haynes@Sun.COM cv_wait(&refreshq_cv, &refreshq_lock);
63512081SThomas.Haynes@Sun.COM CALLB_CPR_SAFE_END(&cprinfo, &refreshq_lock);
63612081SThomas.Haynes@Sun.COM mutex_exit(&refreshq_lock);
63712081SThomas.Haynes@Sun.COM continue;
63812081SThomas.Haynes@Sun.COM }
63912081SThomas.Haynes@Sun.COM mutex_exit(&refreshq_lock);
64012081SThomas.Haynes@Sun.COM
64112081SThomas.Haynes@Sun.COM exi = ren->ren_exi;
64212081SThomas.Haynes@Sun.COM ASSERT(exi != NULL);
64312081SThomas.Haynes@Sun.COM rw_enter(&exi->exi_cache_lock, RW_READER);
64412081SThomas.Haynes@Sun.COM
64512081SThomas.Haynes@Sun.COM while ((ran = list_remove_head(&ren->ren_authlist))) {
64612081SThomas.Haynes@Sun.COM /*
64712081SThomas.Haynes@Sun.COM * We are shutting down. No need to refresh
64812081SThomas.Haynes@Sun.COM * entries which are about to be nuked.
64912081SThomas.Haynes@Sun.COM *
65012081SThomas.Haynes@Sun.COM * So just throw them away until we are done
65112081SThomas.Haynes@Sun.COM * with this exi node...
65212081SThomas.Haynes@Sun.COM */
65312081SThomas.Haynes@Sun.COM if (refreshq_thread_state !=
65412081SThomas.Haynes@Sun.COM REFRESHQ_THREAD_RUNNING) {
65512081SThomas.Haynes@Sun.COM kmem_free(ran, sizeof (refreshq_auth_node_t));
65612081SThomas.Haynes@Sun.COM continue;
65712081SThomas.Haynes@Sun.COM }
65812081SThomas.Haynes@Sun.COM
65912081SThomas.Haynes@Sun.COM p = ran->ran_auth;
66012081SThomas.Haynes@Sun.COM ASSERT(p != NULL);
66112081SThomas.Haynes@Sun.COM
66212081SThomas.Haynes@Sun.COM mutex_enter(&p->auth_lock);
66312081SThomas.Haynes@Sun.COM
66412081SThomas.Haynes@Sun.COM /*
66512081SThomas.Haynes@Sun.COM * Make sure the state is valid now that
66612081SThomas.Haynes@Sun.COM * we have the lock. Note that once we
66712081SThomas.Haynes@Sun.COM * change the state to NFS_AUTH_REFRESHING,
66812081SThomas.Haynes@Sun.COM * no other thread will be able to work on
66912081SThomas.Haynes@Sun.COM * this entry.
67012081SThomas.Haynes@Sun.COM */
67112081SThomas.Haynes@Sun.COM if (p->auth_state != NFS_AUTH_STALE) {
67212081SThomas.Haynes@Sun.COM /*
67312081SThomas.Haynes@Sun.COM * Once it goes INVALID, it can not
67412081SThomas.Haynes@Sun.COM * change state.
67512081SThomas.Haynes@Sun.COM */
67612081SThomas.Haynes@Sun.COM if (p->auth_state == NFS_AUTH_INVALID) {
67712081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
67812081SThomas.Haynes@Sun.COM nfsauth_remove_dead_entry(p);
67912081SThomas.Haynes@Sun.COM } else
68012081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
68112081SThomas.Haynes@Sun.COM
68212081SThomas.Haynes@Sun.COM kmem_free(ran, sizeof (refreshq_auth_node_t));
68312081SThomas.Haynes@Sun.COM continue;
68412081SThomas.Haynes@Sun.COM }
68512081SThomas.Haynes@Sun.COM
68612081SThomas.Haynes@Sun.COM p->auth_state = NFS_AUTH_REFRESHING;
68712081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
68812081SThomas.Haynes@Sun.COM
68912081SThomas.Haynes@Sun.COM DTRACE_PROBE2(nfsauth__debug__cache__refresh,
69012081SThomas.Haynes@Sun.COM struct exportinfo *, exi,
69112081SThomas.Haynes@Sun.COM struct auth_cache *, p);
69212081SThomas.Haynes@Sun.COM
69312081SThomas.Haynes@Sun.COM /*
69412081SThomas.Haynes@Sun.COM * The first caching of the access rights
69512081SThomas.Haynes@Sun.COM * is done with the netid pulled out of the
69612081SThomas.Haynes@Sun.COM * request from the client. All subsequent
69712081SThomas.Haynes@Sun.COM * users of the cache may or may not have
69812081SThomas.Haynes@Sun.COM * the same netid. It doesn't matter. So
69912081SThomas.Haynes@Sun.COM * when we refresh, we simply use the netid
70012081SThomas.Haynes@Sun.COM * of the request which triggered the
70112081SThomas.Haynes@Sun.COM * refresh attempt.
70212081SThomas.Haynes@Sun.COM */
70312081SThomas.Haynes@Sun.COM ASSERT(p->auth_netid != NULL);
70412081SThomas.Haynes@Sun.COM
70512081SThomas.Haynes@Sun.COM retrieval = nfsauth_retrieve(exi, p->auth_netid,
70612081SThomas.Haynes@Sun.COM p->auth_flavor, &p->auth_addr, &access);
70712081SThomas.Haynes@Sun.COM
70812081SThomas.Haynes@Sun.COM /*
70912081SThomas.Haynes@Sun.COM * This can only be set in one other place
71012081SThomas.Haynes@Sun.COM * and the state has to be NFS_AUTH_FRESH.
71112081SThomas.Haynes@Sun.COM */
71212081SThomas.Haynes@Sun.COM kmem_free(p->auth_netid, strlen(p->auth_netid) + 1);
71312081SThomas.Haynes@Sun.COM p->auth_netid = NULL;
71412081SThomas.Haynes@Sun.COM
71512081SThomas.Haynes@Sun.COM /*
71612081SThomas.Haynes@Sun.COM * We got an error, so do not reset the
71712081SThomas.Haynes@Sun.COM * time. This will cause the next access
71812081SThomas.Haynes@Sun.COM * check for the client to reschedule this
71912081SThomas.Haynes@Sun.COM * node.
72012081SThomas.Haynes@Sun.COM */
72112081SThomas.Haynes@Sun.COM if (retrieval == FALSE) {
72212081SThomas.Haynes@Sun.COM mutex_enter(&p->auth_lock);
72312081SThomas.Haynes@Sun.COM if (p->auth_state == NFS_AUTH_INVALID) {
72412081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
72512081SThomas.Haynes@Sun.COM nfsauth_remove_dead_entry(p);
72612081SThomas.Haynes@Sun.COM } else {
72712081SThomas.Haynes@Sun.COM p->auth_state = NFS_AUTH_FRESH;
72812081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
72912081SThomas.Haynes@Sun.COM }
73012081SThomas.Haynes@Sun.COM
73112081SThomas.Haynes@Sun.COM kmem_free(ran, sizeof (refreshq_auth_node_t));
73212081SThomas.Haynes@Sun.COM continue;
73312081SThomas.Haynes@Sun.COM }
73412081SThomas.Haynes@Sun.COM
73512081SThomas.Haynes@Sun.COM mutex_enter(&p->auth_lock);
73612081SThomas.Haynes@Sun.COM if (p->auth_state == NFS_AUTH_INVALID) {
73712081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
73812081SThomas.Haynes@Sun.COM nfsauth_remove_dead_entry(p);
73912081SThomas.Haynes@Sun.COM } else {
74012081SThomas.Haynes@Sun.COM p->auth_access = access;
74112081SThomas.Haynes@Sun.COM p->auth_freshness = gethrestime_sec();
74212081SThomas.Haynes@Sun.COM p->auth_state = NFS_AUTH_FRESH;
74312081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
74412081SThomas.Haynes@Sun.COM }
74512081SThomas.Haynes@Sun.COM
74612081SThomas.Haynes@Sun.COM kmem_free(ran, sizeof (refreshq_auth_node_t));
74712081SThomas.Haynes@Sun.COM }
74812081SThomas.Haynes@Sun.COM
74912081SThomas.Haynes@Sun.COM rw_exit(&exi->exi_cache_lock);
75012081SThomas.Haynes@Sun.COM
75112081SThomas.Haynes@Sun.COM list_destroy(&ren->ren_authlist);
75212081SThomas.Haynes@Sun.COM exi_rele(ren->ren_exi);
75312081SThomas.Haynes@Sun.COM kmem_free(ren, sizeof (refreshq_exi_node_t));
75412081SThomas.Haynes@Sun.COM }
75512081SThomas.Haynes@Sun.COM
75612081SThomas.Haynes@Sun.COM refreshq_thread_state = REFRESHQ_THREAD_HALTED;
75712081SThomas.Haynes@Sun.COM cv_broadcast(&refreshq_cv);
75812081SThomas.Haynes@Sun.COM CALLB_CPR_EXIT(&cprinfo);
75912081SThomas.Haynes@Sun.COM zthread_exit();
76012081SThomas.Haynes@Sun.COM }
76112081SThomas.Haynes@Sun.COM
76212081SThomas.Haynes@Sun.COM /*
76312081SThomas.Haynes@Sun.COM * Get the access information from the cache or callup to the mountd
76412081SThomas.Haynes@Sun.COM * to get and cache the access information in the kernel.
76512081SThomas.Haynes@Sun.COM */
76612081SThomas.Haynes@Sun.COM int
nfsauth_cache_get(struct exportinfo * exi,struct svc_req * req,int flavor)76712081SThomas.Haynes@Sun.COM nfsauth_cache_get(struct exportinfo *exi, struct svc_req *req, int flavor)
76812081SThomas.Haynes@Sun.COM {
76912553SKaren.Rochford@Sun.COM struct netbuf *taddrmask;
77012081SThomas.Haynes@Sun.COM struct netbuf addr;
77112081SThomas.Haynes@Sun.COM struct netbuf *claddr;
77212081SThomas.Haynes@Sun.COM struct auth_cache **head;
77312081SThomas.Haynes@Sun.COM struct auth_cache *p;
77412081SThomas.Haynes@Sun.COM int access;
77512081SThomas.Haynes@Sun.COM time_t refresh;
77612081SThomas.Haynes@Sun.COM
77712081SThomas.Haynes@Sun.COM refreshq_exi_node_t *ren;
77812081SThomas.Haynes@Sun.COM refreshq_auth_node_t *ran;
77912081SThomas.Haynes@Sun.COM
78012081SThomas.Haynes@Sun.COM /*
78112081SThomas.Haynes@Sun.COM * Now check whether this client already
78212081SThomas.Haynes@Sun.COM * has an entry for this flavor in the cache
78312081SThomas.Haynes@Sun.COM * for this export.
78412081SThomas.Haynes@Sun.COM * Get the caller's address, mask off the
78512081SThomas.Haynes@Sun.COM * parts of the address that do not identify
78612081SThomas.Haynes@Sun.COM * the host (port number, etc), and then hash
78712081SThomas.Haynes@Sun.COM * it to find the chain of cache entries.
78812081SThomas.Haynes@Sun.COM */
78912081SThomas.Haynes@Sun.COM
79012081SThomas.Haynes@Sun.COM claddr = svc_getrpccaller(req->rq_xprt);
79112081SThomas.Haynes@Sun.COM addr = *claddr;
79212081SThomas.Haynes@Sun.COM addr.buf = kmem_alloc(addr.len, KM_SLEEP);
79312081SThomas.Haynes@Sun.COM bcopy(claddr->buf, addr.buf, claddr->len);
79412553SKaren.Rochford@Sun.COM SVC_GETADDRMASK(req->rq_xprt, SVC_TATTR_ADDRMASK, (void **)&taddrmask);
79512553SKaren.Rochford@Sun.COM ASSERT(taddrmask != NULL);
79612553SKaren.Rochford@Sun.COM if (taddrmask)
79712553SKaren.Rochford@Sun.COM addrmask(&addr, taddrmask);
79812081SThomas.Haynes@Sun.COM
79912081SThomas.Haynes@Sun.COM rw_enter(&exi->exi_cache_lock, RW_READER);
80012081SThomas.Haynes@Sun.COM head = &exi->exi_cache[hash(&addr)];
80112081SThomas.Haynes@Sun.COM for (p = *head; p; p = p->auth_next) {
80212081SThomas.Haynes@Sun.COM if (EQADDR(&addr, &p->auth_addr) && flavor == p->auth_flavor)
80312081SThomas.Haynes@Sun.COM break;
80412081SThomas.Haynes@Sun.COM }
80512081SThomas.Haynes@Sun.COM
80612081SThomas.Haynes@Sun.COM if (p != NULL) {
80712081SThomas.Haynes@Sun.COM nfsauth_cache_hit++;
80812081SThomas.Haynes@Sun.COM
80912081SThomas.Haynes@Sun.COM refresh = gethrestime_sec() - p->auth_freshness;
81012081SThomas.Haynes@Sun.COM DTRACE_PROBE2(nfsauth__debug__cache__hit,
81112081SThomas.Haynes@Sun.COM int, nfsauth_cache_hit,
81212081SThomas.Haynes@Sun.COM time_t, refresh);
81312081SThomas.Haynes@Sun.COM
81412081SThomas.Haynes@Sun.COM mutex_enter(&p->auth_lock);
81512081SThomas.Haynes@Sun.COM if ((refresh > NFSAUTH_CACHE_REFRESH) &&
81612081SThomas.Haynes@Sun.COM p->auth_state == NFS_AUTH_FRESH) {
81712081SThomas.Haynes@Sun.COM p->auth_state = NFS_AUTH_STALE;
81812081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
81912081SThomas.Haynes@Sun.COM
82012081SThomas.Haynes@Sun.COM ASSERT(p->auth_netid == NULL);
82112081SThomas.Haynes@Sun.COM p->auth_netid =
82212081SThomas.Haynes@Sun.COM strdup(svc_getnetid(req->rq_xprt));
82312081SThomas.Haynes@Sun.COM
82412081SThomas.Haynes@Sun.COM nfsauth_cache_refresh++;
82512081SThomas.Haynes@Sun.COM
82612081SThomas.Haynes@Sun.COM DTRACE_PROBE3(nfsauth__debug__cache__stale,
82712081SThomas.Haynes@Sun.COM struct exportinfo *, exi,
82812081SThomas.Haynes@Sun.COM struct auth_cache *, p,
82912081SThomas.Haynes@Sun.COM int, nfsauth_cache_refresh);
83012081SThomas.Haynes@Sun.COM
83112081SThomas.Haynes@Sun.COM ran = kmem_alloc(sizeof (refreshq_auth_node_t),
83212081SThomas.Haynes@Sun.COM KM_SLEEP);
83312081SThomas.Haynes@Sun.COM ran->ran_auth = p;
83412081SThomas.Haynes@Sun.COM
83512081SThomas.Haynes@Sun.COM mutex_enter(&refreshq_lock);
83612081SThomas.Haynes@Sun.COM /*
83712081SThomas.Haynes@Sun.COM * We should not add a work queue
83812081SThomas.Haynes@Sun.COM * item if the thread is not
83912081SThomas.Haynes@Sun.COM * accepting them.
84012081SThomas.Haynes@Sun.COM */
84112081SThomas.Haynes@Sun.COM if (refreshq_thread_state == REFRESHQ_THREAD_RUNNING) {
84212081SThomas.Haynes@Sun.COM /*
84312081SThomas.Haynes@Sun.COM * Is there an existing exi_list?
84412081SThomas.Haynes@Sun.COM */
84512081SThomas.Haynes@Sun.COM for (ren = list_head(&refreshq_queue);
84612081SThomas.Haynes@Sun.COM ren != NULL;
84712081SThomas.Haynes@Sun.COM ren = list_next(&refreshq_queue, ren)) {
84812081SThomas.Haynes@Sun.COM if (ren->ren_exi == exi) {
84912081SThomas.Haynes@Sun.COM list_insert_tail(
85012081SThomas.Haynes@Sun.COM &ren->ren_authlist, ran);
85112081SThomas.Haynes@Sun.COM break;
85212081SThomas.Haynes@Sun.COM }
85312081SThomas.Haynes@Sun.COM }
85412081SThomas.Haynes@Sun.COM
85512081SThomas.Haynes@Sun.COM if (ren == NULL) {
85612081SThomas.Haynes@Sun.COM ren = kmem_alloc(
85712081SThomas.Haynes@Sun.COM sizeof (refreshq_exi_node_t),
85812081SThomas.Haynes@Sun.COM KM_SLEEP);
85912081SThomas.Haynes@Sun.COM
86012081SThomas.Haynes@Sun.COM exi_hold(exi);
86112081SThomas.Haynes@Sun.COM ren->ren_exi = exi;
86212081SThomas.Haynes@Sun.COM
86312081SThomas.Haynes@Sun.COM list_create(&ren->ren_authlist,
86412081SThomas.Haynes@Sun.COM sizeof (refreshq_auth_node_t),
86512081SThomas.Haynes@Sun.COM offsetof(refreshq_auth_node_t,
86612081SThomas.Haynes@Sun.COM ran_node));
86712081SThomas.Haynes@Sun.COM
86812081SThomas.Haynes@Sun.COM list_insert_tail(&ren->ren_authlist,
86912081SThomas.Haynes@Sun.COM ran);
87012081SThomas.Haynes@Sun.COM list_insert_tail(&refreshq_queue, ren);
87112081SThomas.Haynes@Sun.COM }
87212081SThomas.Haynes@Sun.COM
87312081SThomas.Haynes@Sun.COM cv_broadcast(&refreshq_cv);
87412081SThomas.Haynes@Sun.COM } else {
87512081SThomas.Haynes@Sun.COM kmem_free(ran, sizeof (refreshq_auth_node_t));
87612081SThomas.Haynes@Sun.COM }
87712081SThomas.Haynes@Sun.COM
87812081SThomas.Haynes@Sun.COM mutex_exit(&refreshq_lock);
87912081SThomas.Haynes@Sun.COM } else {
88012081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
88112081SThomas.Haynes@Sun.COM }
88212081SThomas.Haynes@Sun.COM
88312081SThomas.Haynes@Sun.COM access = p->auth_access;
88412081SThomas.Haynes@Sun.COM p->auth_time = gethrestime_sec();
88512081SThomas.Haynes@Sun.COM
88612081SThomas.Haynes@Sun.COM rw_exit(&exi->exi_cache_lock);
88712081SThomas.Haynes@Sun.COM kmem_free(addr.buf, addr.len);
88812081SThomas.Haynes@Sun.COM
88912081SThomas.Haynes@Sun.COM return (access);
89012081SThomas.Haynes@Sun.COM }
89112081SThomas.Haynes@Sun.COM
89212081SThomas.Haynes@Sun.COM rw_exit(&exi->exi_cache_lock);
89312081SThomas.Haynes@Sun.COM
89412081SThomas.Haynes@Sun.COM nfsauth_cache_miss++;
89512081SThomas.Haynes@Sun.COM
89612081SThomas.Haynes@Sun.COM if (!nfsauth_retrieve(exi, svc_getnetid(req->rq_xprt), flavor,
89712081SThomas.Haynes@Sun.COM &addr, &access)) {
89812081SThomas.Haynes@Sun.COM kmem_free(addr.buf, addr.len);
89912081SThomas.Haynes@Sun.COM return (access);
90012081SThomas.Haynes@Sun.COM }
90112081SThomas.Haynes@Sun.COM
9020Sstevel@tonic-gate /*
9030Sstevel@tonic-gate * Now cache the result on the cache chain
9040Sstevel@tonic-gate * for this export (if there's enough memory)
9050Sstevel@tonic-gate */
90612081SThomas.Haynes@Sun.COM p = kmem_cache_alloc(exi_cache_handle, KM_NOSLEEP);
90712081SThomas.Haynes@Sun.COM if (p != NULL) {
90812081SThomas.Haynes@Sun.COM p->auth_addr = addr;
90912081SThomas.Haynes@Sun.COM p->auth_flavor = flavor;
91012081SThomas.Haynes@Sun.COM p->auth_access = access;
91112081SThomas.Haynes@Sun.COM p->auth_time = p->auth_freshness = gethrestime_sec();
91212081SThomas.Haynes@Sun.COM p->auth_state = NFS_AUTH_FRESH;
91312081SThomas.Haynes@Sun.COM p->auth_netid = NULL;
91412081SThomas.Haynes@Sun.COM mutex_init(&p->auth_lock, NULL, MUTEX_DEFAULT, NULL);
91512081SThomas.Haynes@Sun.COM
9160Sstevel@tonic-gate rw_enter(&exi->exi_cache_lock, RW_WRITER);
91712081SThomas.Haynes@Sun.COM p->auth_next = *head;
91812081SThomas.Haynes@Sun.COM *head = p;
9190Sstevel@tonic-gate rw_exit(&exi->exi_cache_lock);
9200Sstevel@tonic-gate } else {
9210Sstevel@tonic-gate kmem_free(addr.buf, addr.len);
9220Sstevel@tonic-gate }
9230Sstevel@tonic-gate
9240Sstevel@tonic-gate return (access);
9250Sstevel@tonic-gate }
9260Sstevel@tonic-gate
9270Sstevel@tonic-gate /*
9280Sstevel@tonic-gate * Check if the requesting client has access to the filesystem with
9290Sstevel@tonic-gate * a given nfs flavor number which is an explicitly shared flavor.
9300Sstevel@tonic-gate */
9310Sstevel@tonic-gate int
nfsauth4_secinfo_access(struct exportinfo * exi,struct svc_req * req,int flavor,int perm)9320Sstevel@tonic-gate nfsauth4_secinfo_access(struct exportinfo *exi, struct svc_req *req,
9330Sstevel@tonic-gate int flavor, int perm)
9340Sstevel@tonic-gate {
9350Sstevel@tonic-gate int access;
9360Sstevel@tonic-gate
9370Sstevel@tonic-gate if (! (perm & M_4SEC_EXPORTED)) {
9380Sstevel@tonic-gate return (NFSAUTH_DENIED);
9390Sstevel@tonic-gate }
9400Sstevel@tonic-gate
9410Sstevel@tonic-gate /*
9420Sstevel@tonic-gate * Optimize if there are no lists
9430Sstevel@tonic-gate */
9447961SNatalie.Li@Sun.COM if ((perm & (M_ROOT|M_NONE)) == 0) {
9450Sstevel@tonic-gate perm &= ~M_4SEC_EXPORTED;
9460Sstevel@tonic-gate if (perm == M_RO)
9470Sstevel@tonic-gate return (NFSAUTH_RO);
9480Sstevel@tonic-gate if (perm == M_RW)
9490Sstevel@tonic-gate return (NFSAUTH_RW);
9500Sstevel@tonic-gate }
9510Sstevel@tonic-gate
9520Sstevel@tonic-gate access = nfsauth_cache_get(exi, req, flavor);
9530Sstevel@tonic-gate
9540Sstevel@tonic-gate return (access);
9550Sstevel@tonic-gate }
9560Sstevel@tonic-gate
9570Sstevel@tonic-gate int
nfsauth_access(struct exportinfo * exi,struct svc_req * req)9580Sstevel@tonic-gate nfsauth_access(struct exportinfo *exi, struct svc_req *req)
9590Sstevel@tonic-gate {
9600Sstevel@tonic-gate int access, mapaccess;
9610Sstevel@tonic-gate struct secinfo *sp;
9620Sstevel@tonic-gate int i, flavor, perm;
9630Sstevel@tonic-gate int authnone_entry = -1;
9640Sstevel@tonic-gate
9650Sstevel@tonic-gate /*
9660Sstevel@tonic-gate * Get the nfs flavor number from xprt.
9670Sstevel@tonic-gate */
9680Sstevel@tonic-gate flavor = (int)(uintptr_t)req->rq_xprt->xp_cookie;
9690Sstevel@tonic-gate
9700Sstevel@tonic-gate /*
9710Sstevel@tonic-gate * First check the access restrictions on the filesystem. If
9720Sstevel@tonic-gate * there are no lists associated with this flavor then there's no
9730Sstevel@tonic-gate * need to make an expensive call to the nfsauth service or to
9740Sstevel@tonic-gate * cache anything.
9750Sstevel@tonic-gate */
9760Sstevel@tonic-gate
9770Sstevel@tonic-gate sp = exi->exi_export.ex_secinfo;
9780Sstevel@tonic-gate for (i = 0; i < exi->exi_export.ex_seccnt; i++) {
9790Sstevel@tonic-gate if (flavor != sp[i].s_secinfo.sc_nfsnum) {
9800Sstevel@tonic-gate if (sp[i].s_secinfo.sc_nfsnum == AUTH_NONE)
9810Sstevel@tonic-gate authnone_entry = i;
9820Sstevel@tonic-gate continue;
9830Sstevel@tonic-gate }
9840Sstevel@tonic-gate break;
9850Sstevel@tonic-gate }
9860Sstevel@tonic-gate
9870Sstevel@tonic-gate mapaccess = 0;
9880Sstevel@tonic-gate
9890Sstevel@tonic-gate if (i >= exi->exi_export.ex_seccnt) {
9900Sstevel@tonic-gate /*
9910Sstevel@tonic-gate * Flavor not found, but use AUTH_NONE if it exists
9920Sstevel@tonic-gate */
9930Sstevel@tonic-gate if (authnone_entry == -1)
9940Sstevel@tonic-gate return (NFSAUTH_DENIED);
9950Sstevel@tonic-gate flavor = AUTH_NONE;
9960Sstevel@tonic-gate mapaccess = NFSAUTH_MAPNONE;
9970Sstevel@tonic-gate i = authnone_entry;
9980Sstevel@tonic-gate }
9990Sstevel@tonic-gate
10000Sstevel@tonic-gate /*
10010Sstevel@tonic-gate * If the flavor is in the ex_secinfo list, but not an explicitly
10020Sstevel@tonic-gate * shared flavor by the user, it is a result of the nfsv4 server
10030Sstevel@tonic-gate * namespace setup. We will grant an RO permission similar for
10040Sstevel@tonic-gate * a pseudo node except that this node is a shared one.
10050Sstevel@tonic-gate *
10060Sstevel@tonic-gate * e.g. flavor in (flavor) indicates that it is not explictly
10070Sstevel@tonic-gate * shared by the user:
10080Sstevel@tonic-gate *
10090Sstevel@tonic-gate * / (sys, krb5)
10100Sstevel@tonic-gate * |
10110Sstevel@tonic-gate * export #share -o sec=sys (krb5)
10120Sstevel@tonic-gate * |
10130Sstevel@tonic-gate * secure #share -o sec=krb5
10140Sstevel@tonic-gate *
10150Sstevel@tonic-gate * In this case, when a krb5 request coming in to access
10160Sstevel@tonic-gate * /export, RO permission is granted.
10170Sstevel@tonic-gate */
10180Sstevel@tonic-gate if (!(sp[i].s_flags & M_4SEC_EXPORTED))
10190Sstevel@tonic-gate return (mapaccess | NFSAUTH_RO);
10200Sstevel@tonic-gate
10210Sstevel@tonic-gate /*
10220Sstevel@tonic-gate * Optimize if there are no lists
10230Sstevel@tonic-gate */
10240Sstevel@tonic-gate perm = sp[i].s_flags;
10257961SNatalie.Li@Sun.COM if ((perm & (M_ROOT|M_NONE)) == 0) {
10260Sstevel@tonic-gate perm &= ~M_4SEC_EXPORTED;
10270Sstevel@tonic-gate if (perm == M_RO)
10280Sstevel@tonic-gate return (mapaccess | NFSAUTH_RO);
10290Sstevel@tonic-gate if (perm == M_RW)
10300Sstevel@tonic-gate return (mapaccess | NFSAUTH_RW);
10310Sstevel@tonic-gate }
10320Sstevel@tonic-gate
10330Sstevel@tonic-gate access = nfsauth_cache_get(exi, req, flavor);
10348984SVallish.Vaidyeshwara@Sun.COM
10358984SVallish.Vaidyeshwara@Sun.COM /*
10368984SVallish.Vaidyeshwara@Sun.COM * Client's security flavor doesn't match with "ro" or
10378984SVallish.Vaidyeshwara@Sun.COM * "rw" list. Try again using AUTH_NONE if present.
10388984SVallish.Vaidyeshwara@Sun.COM */
10398984SVallish.Vaidyeshwara@Sun.COM if ((access & NFSAUTH_WRONGSEC) && (flavor != AUTH_NONE)) {
10408984SVallish.Vaidyeshwara@Sun.COM /*
10418984SVallish.Vaidyeshwara@Sun.COM * Have we already encountered AUTH_NONE ?
10428984SVallish.Vaidyeshwara@Sun.COM */
10438984SVallish.Vaidyeshwara@Sun.COM if (authnone_entry != -1) {
10448984SVallish.Vaidyeshwara@Sun.COM mapaccess = NFSAUTH_MAPNONE;
10458984SVallish.Vaidyeshwara@Sun.COM access = nfsauth_cache_get(exi, req, AUTH_NONE);
10468984SVallish.Vaidyeshwara@Sun.COM } else {
10478984SVallish.Vaidyeshwara@Sun.COM /*
10488984SVallish.Vaidyeshwara@Sun.COM * Check for AUTH_NONE presence.
10498984SVallish.Vaidyeshwara@Sun.COM */
10508984SVallish.Vaidyeshwara@Sun.COM for (; i < exi->exi_export.ex_seccnt; i++) {
10518984SVallish.Vaidyeshwara@Sun.COM if (sp[i].s_secinfo.sc_nfsnum == AUTH_NONE) {
10528984SVallish.Vaidyeshwara@Sun.COM mapaccess = NFSAUTH_MAPNONE;
10538984SVallish.Vaidyeshwara@Sun.COM access = nfsauth_cache_get(exi, req,
10548984SVallish.Vaidyeshwara@Sun.COM AUTH_NONE);
10558984SVallish.Vaidyeshwara@Sun.COM break;
10568984SVallish.Vaidyeshwara@Sun.COM }
10578984SVallish.Vaidyeshwara@Sun.COM }
10588984SVallish.Vaidyeshwara@Sun.COM }
10598984SVallish.Vaidyeshwara@Sun.COM }
10608984SVallish.Vaidyeshwara@Sun.COM
10617961SNatalie.Li@Sun.COM if (access & NFSAUTH_DENIED)
10627961SNatalie.Li@Sun.COM access = NFSAUTH_DENIED;
10630Sstevel@tonic-gate
10640Sstevel@tonic-gate return (access | mapaccess);
10650Sstevel@tonic-gate }
10660Sstevel@tonic-gate
106712081SThomas.Haynes@Sun.COM static void
nfsauth_free_node(struct auth_cache * p)106812081SThomas.Haynes@Sun.COM nfsauth_free_node(struct auth_cache *p)
106912081SThomas.Haynes@Sun.COM {
107012081SThomas.Haynes@Sun.COM if (p->auth_netid != NULL)
107112081SThomas.Haynes@Sun.COM kmem_free(p->auth_netid, strlen(p->auth_netid) + 1);
107212081SThomas.Haynes@Sun.COM kmem_free(p->auth_addr.buf, p->auth_addr.len);
107312081SThomas.Haynes@Sun.COM mutex_destroy(&p->auth_lock);
107412081SThomas.Haynes@Sun.COM kmem_cache_free(exi_cache_handle, (void *)p);
107512081SThomas.Haynes@Sun.COM }
107612081SThomas.Haynes@Sun.COM
107712081SThomas.Haynes@Sun.COM /*
107812081SThomas.Haynes@Sun.COM * Remove the dead entry from the refreshq_dead_entries
107912081SThomas.Haynes@Sun.COM * list.
108012081SThomas.Haynes@Sun.COM */
108112081SThomas.Haynes@Sun.COM static void
nfsauth_remove_dead_entry(struct auth_cache * dead)108212081SThomas.Haynes@Sun.COM nfsauth_remove_dead_entry(struct auth_cache *dead)
108312081SThomas.Haynes@Sun.COM {
108412081SThomas.Haynes@Sun.COM struct auth_cache *p;
108512081SThomas.Haynes@Sun.COM struct auth_cache *prev;
108612081SThomas.Haynes@Sun.COM struct auth_cache *next;
108712081SThomas.Haynes@Sun.COM
108812081SThomas.Haynes@Sun.COM mutex_enter(&refreshq_lock);
108912081SThomas.Haynes@Sun.COM prev = NULL;
109012081SThomas.Haynes@Sun.COM for (p = refreshq_dead_entries; p != NULL; p = next) {
109112081SThomas.Haynes@Sun.COM next = p->auth_next;
109212081SThomas.Haynes@Sun.COM
109312081SThomas.Haynes@Sun.COM if (p == dead) {
109412081SThomas.Haynes@Sun.COM if (prev == NULL)
109512081SThomas.Haynes@Sun.COM refreshq_dead_entries = next;
109612081SThomas.Haynes@Sun.COM else
109712081SThomas.Haynes@Sun.COM prev->auth_next = next;
109812081SThomas.Haynes@Sun.COM
109912081SThomas.Haynes@Sun.COM nfsauth_free_node(dead);
110012081SThomas.Haynes@Sun.COM break;
110112081SThomas.Haynes@Sun.COM }
110212081SThomas.Haynes@Sun.COM
110312081SThomas.Haynes@Sun.COM prev = p;
110412081SThomas.Haynes@Sun.COM }
110512081SThomas.Haynes@Sun.COM mutex_exit(&refreshq_lock);
110612081SThomas.Haynes@Sun.COM }
110712081SThomas.Haynes@Sun.COM
11080Sstevel@tonic-gate /*
11090Sstevel@tonic-gate * Free the nfsauth cache for a given export
11100Sstevel@tonic-gate */
11110Sstevel@tonic-gate void
nfsauth_cache_free(struct exportinfo * exi)11120Sstevel@tonic-gate nfsauth_cache_free(struct exportinfo *exi)
11130Sstevel@tonic-gate {
11140Sstevel@tonic-gate int i;
11150Sstevel@tonic-gate struct auth_cache *p, *next;
11160Sstevel@tonic-gate
11170Sstevel@tonic-gate for (i = 0; i < AUTH_TABLESIZE; i++) {
11180Sstevel@tonic-gate for (p = exi->exi_cache[i]; p; p = next) {
11190Sstevel@tonic-gate next = p->auth_next;
112012081SThomas.Haynes@Sun.COM
112112081SThomas.Haynes@Sun.COM /*
112212081SThomas.Haynes@Sun.COM * The only way we got here
112312081SThomas.Haynes@Sun.COM * was with an exi_rele, which
112412081SThomas.Haynes@Sun.COM * means that no auth cache entry
112512081SThomas.Haynes@Sun.COM * is being refreshed.
112612081SThomas.Haynes@Sun.COM */
112712081SThomas.Haynes@Sun.COM nfsauth_free_node(p);
11280Sstevel@tonic-gate }
11290Sstevel@tonic-gate }
11300Sstevel@tonic-gate }
11310Sstevel@tonic-gate
11320Sstevel@tonic-gate /*
11330Sstevel@tonic-gate * Called by the kernel memory allocator when
11340Sstevel@tonic-gate * memory is low. Free unused cache entries.
11350Sstevel@tonic-gate * If that's not enough, the VM system will
11360Sstevel@tonic-gate * call again for some more.
11370Sstevel@tonic-gate */
11380Sstevel@tonic-gate /*ARGSUSED*/
11390Sstevel@tonic-gate void
exi_cache_reclaim(void * cdrarg)11400Sstevel@tonic-gate exi_cache_reclaim(void *cdrarg)
11410Sstevel@tonic-gate {
11420Sstevel@tonic-gate int i;
11430Sstevel@tonic-gate struct exportinfo *exi;
11440Sstevel@tonic-gate
11450Sstevel@tonic-gate rw_enter(&exported_lock, RW_READER);
11460Sstevel@tonic-gate
11470Sstevel@tonic-gate for (i = 0; i < EXPTABLESIZE; i++) {
1148*12679SPavel.Filipensky@Sun.COM for (exi = exptable[i]; exi; exi = exi->fid_hash.next) {
11490Sstevel@tonic-gate exi_cache_trim(exi);
11500Sstevel@tonic-gate }
11510Sstevel@tonic-gate }
11520Sstevel@tonic-gate nfsauth_cache_reclaim++;
11530Sstevel@tonic-gate
11540Sstevel@tonic-gate rw_exit(&exported_lock);
11550Sstevel@tonic-gate }
11560Sstevel@tonic-gate
11570Sstevel@tonic-gate void
exi_cache_trim(struct exportinfo * exi)11580Sstevel@tonic-gate exi_cache_trim(struct exportinfo *exi)
11590Sstevel@tonic-gate {
11600Sstevel@tonic-gate struct auth_cache *p;
11610Sstevel@tonic-gate struct auth_cache *prev, *next;
11620Sstevel@tonic-gate int i;
11630Sstevel@tonic-gate time_t stale_time;
11640Sstevel@tonic-gate
116512081SThomas.Haynes@Sun.COM stale_time = gethrestime_sec() - NFSAUTH_CACHE_TRIM;
11660Sstevel@tonic-gate
11670Sstevel@tonic-gate rw_enter(&exi->exi_cache_lock, RW_WRITER);
11680Sstevel@tonic-gate
11690Sstevel@tonic-gate for (i = 0; i < AUTH_TABLESIZE; i++) {
11700Sstevel@tonic-gate
11710Sstevel@tonic-gate /*
11720Sstevel@tonic-gate * Free entries that have not been
117312081SThomas.Haynes@Sun.COM * used for NFSAUTH_CACHE_TRIM seconds.
11740Sstevel@tonic-gate */
11750Sstevel@tonic-gate prev = NULL;
11760Sstevel@tonic-gate for (p = exi->exi_cache[i]; p; p = next) {
11770Sstevel@tonic-gate next = p->auth_next;
11780Sstevel@tonic-gate if (p->auth_time > stale_time) {
11790Sstevel@tonic-gate prev = p;
11800Sstevel@tonic-gate continue;
11810Sstevel@tonic-gate }
11820Sstevel@tonic-gate
118312081SThomas.Haynes@Sun.COM mutex_enter(&p->auth_lock);
118412081SThomas.Haynes@Sun.COM DTRACE_PROBE1(nfsauth__debug__trim__state,
118512081SThomas.Haynes@Sun.COM auth_state_t, p->auth_state);
118612081SThomas.Haynes@Sun.COM
118712081SThomas.Haynes@Sun.COM if (p->auth_state != NFS_AUTH_FRESH) {
118812081SThomas.Haynes@Sun.COM p->auth_state = NFS_AUTH_INVALID;
118912081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
119012081SThomas.Haynes@Sun.COM
119112081SThomas.Haynes@Sun.COM mutex_enter(&refreshq_lock);
119212081SThomas.Haynes@Sun.COM p->auth_next = refreshq_dead_entries;
119312081SThomas.Haynes@Sun.COM refreshq_dead_entries = p;
119412081SThomas.Haynes@Sun.COM mutex_exit(&refreshq_lock);
119512081SThomas.Haynes@Sun.COM } else {
119612081SThomas.Haynes@Sun.COM mutex_exit(&p->auth_lock);
119712081SThomas.Haynes@Sun.COM nfsauth_free_node(p);
119812081SThomas.Haynes@Sun.COM }
119912081SThomas.Haynes@Sun.COM
12000Sstevel@tonic-gate if (prev == NULL)
12010Sstevel@tonic-gate exi->exi_cache[i] = next;
12020Sstevel@tonic-gate else
12030Sstevel@tonic-gate prev->auth_next = next;
12040Sstevel@tonic-gate }
12050Sstevel@tonic-gate }
12060Sstevel@tonic-gate
12070Sstevel@tonic-gate rw_exit(&exi->exi_cache_lock);
12080Sstevel@tonic-gate }
1209