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Diffstat (limited to 'fs/nfsd/nfs4state.c')
-rw-r--r--fs/nfsd/nfs4state.c201
1 files changed, 118 insertions, 83 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 94effd5bc4a1..cc894eda385a 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -38,18 +38,21 @@
#include <linux/namei.h>
#include <linux/swap.h>
#include <linux/pagemap.h>
+#include <linux/ratelimit.h>
#include <linux/sunrpc/svcauth_gss.h>
#include <linux/sunrpc/clnt.h>
#include "xdr4.h"
#include "vfs.h"
#include "current_stateid.h"
+#include "fault_inject.h"
+
+#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
/* Globals */
time_t nfsd4_lease = 90; /* default lease time */
time_t nfsd4_grace = 90;
-static time_t boot_time;
#define all_ones {{~0,~0},~0}
static const stateid_t one_stateid = {
@@ -862,6 +865,11 @@ static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses,
if (ret)
/* oops; xprt is already down: */
nfsd4_conn_lost(&conn->cn_xpt_user);
+ if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN &&
+ dir & NFS4_CDFC4_BACK) {
+ /* callback channel may be back up */
+ nfsd4_probe_callback(ses->se_client);
+ }
return nfs_ok;
}
@@ -1047,12 +1055,12 @@ renew_client(struct nfs4_client *clp)
/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
static int
-STALE_CLIENTID(clientid_t *clid)
+STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
{
- if (clid->cl_boot == boot_time)
+ if (clid->cl_boot == nn->boot_time)
return 0;
dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
- clid->cl_boot, clid->cl_id, boot_time);
+ clid->cl_boot, clid->cl_id, nn->boot_time);
return 1;
}
@@ -1215,7 +1223,7 @@ static bool groups_equal(struct group_info *g1, struct group_info *g2)
return true;
}
-static int
+static bool
same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
{
if ((cr1->cr_flavor != cr2->cr_flavor)
@@ -1227,14 +1235,15 @@ same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
return true;
if (!cr1->cr_principal || !cr2->cr_principal)
return false;
- return 0 == strcmp(cr1->cr_principal, cr1->cr_principal);
+ return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
}
static void gen_clid(struct nfs4_client *clp)
{
static u32 current_clientid = 1;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
- clp->cl_clientid.cl_boot = boot_time;
+ clp->cl_clientid.cl_boot = nn->boot_time;
clp->cl_clientid.cl_id = current_clientid++;
}
@@ -2217,8 +2226,9 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
nfs4_verifier confirm = setclientid_confirm->sc_confirm;
clientid_t * clid = &setclientid_confirm->sc_clientid;
__be32 status;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
- if (STALE_CLIENTID(clid))
+ if (STALE_CLIENTID(clid, nn))
return nfserr_stale_clientid;
nfs4_lock_state();
@@ -2577,8 +2587,9 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
unsigned int strhashval;
struct nfs4_openowner *oo = NULL;
__be32 status;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
- if (STALE_CLIENTID(&open->op_clientid))
+ if (STALE_CLIENTID(&open->op_clientid, nn))
return nfserr_stale_clientid;
/*
* In case we need it later, after we've already created the
@@ -2876,7 +2887,8 @@ static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
* Attempt to hand out a delegation.
*/
static void
-nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
+nfs4_open_delegation(struct net *net, struct svc_fh *fh,
+ struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
{
struct nfs4_delegation *dp;
struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
@@ -2897,7 +2909,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_
case NFS4_OPEN_CLAIM_NULL:
/* Let's not give out any delegations till everyone's
* had the chance to reclaim theirs.... */
- if (locks_in_grace())
+ if (locks_in_grace(net))
goto out;
if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
goto out;
@@ -3007,14 +3019,12 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
status = nfs4_get_vfs_file(rqstp, fp, current_fh, open);
if (status)
goto out;
+ status = nfsd4_truncate(rqstp, current_fh, open);
+ if (status)
+ goto out;
stp = open->op_stp;
open->op_stp = NULL;
init_open_stateid(stp, fp, open);
- status = nfsd4_truncate(rqstp, current_fh, open);
- if (status) {
- release_open_stateid(stp);
- goto out;
- }
}
update_stateid(&stp->st_stid.sc_stateid);
memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
@@ -3033,7 +3043,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
* Attempt to hand out a delegation. No error return, because the
* OPEN succeeds even if we fail.
*/
- nfs4_open_delegation(current_fh, open, stp);
+ nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp);
nodeleg:
status = nfs_ok;
@@ -3087,12 +3097,13 @@ nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
{
struct nfs4_client *clp;
__be32 status;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
nfs4_lock_state();
dprintk("process_renew(%08x/%08x): starting\n",
clid->cl_boot, clid->cl_id);
status = nfserr_stale_clientid;
- if (STALE_CLIENTID(clid))
+ if (STALE_CLIENTID(clid, nn))
goto out;
clp = find_confirmed_client(clid);
status = nfserr_expired;
@@ -3111,22 +3122,19 @@ out:
return status;
}
-static struct lock_manager nfsd4_manager = {
-};
-
-static bool grace_ended;
-
static void
-nfsd4_end_grace(void)
+nfsd4_end_grace(struct net *net)
{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
/* do nothing if grace period already ended */
- if (grace_ended)
+ if (nn->grace_ended)
return;
dprintk("NFSD: end of grace period\n");
- grace_ended = true;
- nfsd4_record_grace_done(&init_net, boot_time);
- locks_end_grace(&nfsd4_manager);
+ nn->grace_ended = true;
+ nfsd4_record_grace_done(net, nn->boot_time);
+ locks_end_grace(&nn->nfsd4_manager);
/*
* Now that every NFSv4 client has had the chance to recover and
* to see the (possibly new, possibly shorter) lease time, we
@@ -3149,7 +3157,7 @@ nfs4_laundromat(void)
nfs4_lock_state();
dprintk("NFSD: laundromat service - starting\n");
- nfsd4_end_grace();
+ nfsd4_end_grace(&init_net);
INIT_LIST_HEAD(&reaplist);
spin_lock(&client_lock);
list_for_each_safe(pos, next, &client_lru) {
@@ -3231,9 +3239,9 @@ static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *s
}
static int
-STALE_STATEID(stateid_t *stateid)
+STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn)
{
- if (stateid->si_opaque.so_clid.cl_boot == boot_time)
+ if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time)
return 0;
dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
STATEID_VAL(stateid));
@@ -3273,11 +3281,11 @@ out:
}
static inline __be32
-check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
+check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
{
if (ONE_STATEID(stateid) && (flags & RD_STATE))
return nfs_ok;
- else if (locks_in_grace()) {
+ else if (locks_in_grace(net)) {
/* Answer in remaining cases depends on existence of
* conflicting state; so we must wait out the grace period. */
return nfserr_grace;
@@ -3294,9 +3302,9 @@ check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
* that are not able to provide mandatory locking.
*/
static inline int
-grace_disallows_io(struct inode *inode)
+grace_disallows_io(struct net *net, struct inode *inode)
{
- return locks_in_grace() && mandatory_lock(inode);
+ return locks_in_grace(net) && mandatory_lock(inode);
}
/* Returns true iff a is later than b: */
@@ -3333,18 +3341,26 @@ static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_s
return nfserr_old_stateid;
}
-__be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
+static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
{
struct nfs4_stid *s;
struct nfs4_ol_stateid *ols;
__be32 status;
- if (STALE_STATEID(stateid))
- return nfserr_stale_stateid;
-
+ if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
+ return nfserr_bad_stateid;
+ /* Client debugging aid. */
+ if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
+ char addr_str[INET6_ADDRSTRLEN];
+ rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
+ sizeof(addr_str));
+ pr_warn_ratelimited("NFSD: client %s testing state ID "
+ "with incorrect client ID\n", addr_str);
+ return nfserr_bad_stateid;
+ }
s = find_stateid(cl, stateid);
if (!s)
- return nfserr_stale_stateid;
+ return nfserr_bad_stateid;
status = check_stateid_generation(stateid, &s->sc_stateid, 1);
if (status)
return status;
@@ -3360,10 +3376,11 @@ __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s)
{
struct nfs4_client *cl;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
return nfserr_bad_stateid;
- if (STALE_STATEID(stateid))
+ if (STALE_STATEID(stateid, nn))
return nfserr_stale_stateid;
cl = find_confirmed_client(&stateid->si_opaque.so_clid);
if (!cl)
@@ -3379,7 +3396,7 @@ static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, s
* Checks for stateid operations
*/
__be32
-nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
+nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
stateid_t *stateid, int flags, struct file **filpp)
{
struct nfs4_stid *s;
@@ -3392,11 +3409,11 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
if (filpp)
*filpp = NULL;
- if (grace_disallows_io(ino))
+ if (grace_disallows_io(net, ino))
return nfserr_grace;
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
- return check_special_stateids(current_fh, stateid, flags);
+ return check_special_stateids(net, current_fh, stateid, flags);
status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s);
if (status)
@@ -3463,7 +3480,8 @@ nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfs4_lock_state();
list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
- stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid);
+ stateid->ts_id_status =
+ nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
nfs4_unlock_state();
return nfs_ok;
@@ -3750,12 +3768,19 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfsd4_close_open_stateid(stp);
oo->oo_last_closed_stid = stp;
- /* place unused nfs4_stateowners on so_close_lru list to be
- * released by the laundromat service after the lease period
- * to enable us to handle CLOSE replay
- */
- if (list_empty(&oo->oo_owner.so_stateids))
- move_to_close_lru(oo);
+ if (list_empty(&oo->oo_owner.so_stateids)) {
+ if (cstate->minorversion) {
+ release_openowner(oo);
+ cstate->replay_owner = NULL;
+ } else {
+ /*
+ * In the 4.0 case we need to keep the owners around a
+ * little while to handle CLOSE replay.
+ */
+ if (list_empty(&oo->oo_owner.so_stateids))
+ move_to_close_lru(oo);
+ }
+ }
out:
if (!cstate->replay_owner)
nfs4_unlock_state();
@@ -4027,6 +4052,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
bool new_state = false;
int lkflg;
int err;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
(long long) lock->lk_offset,
@@ -4044,11 +4070,6 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfs4_lock_state();
if (lock->lk_is_new) {
- /*
- * Client indicates that this is a new lockowner.
- * Use open owner and open stateid to create lock owner and
- * lock stateid.
- */
struct nfs4_ol_stateid *open_stp = NULL;
if (nfsd4_has_session(cstate))
@@ -4058,7 +4079,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
sizeof(clientid_t));
status = nfserr_stale_clientid;
- if (STALE_CLIENTID(&lock->lk_new_clientid))
+ if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
goto out;
/* validate and update open stateid and open seqid */
@@ -4075,17 +4096,13 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
status = lookup_or_create_lock_state(cstate, open_stp, lock,
&lock_stp, &new_state);
- if (status)
- goto out;
- } else {
- /* lock (lock owner + lock stateid) already exists */
+ } else
status = nfs4_preprocess_seqid_op(cstate,
lock->lk_old_lock_seqid,
&lock->lk_old_lock_stateid,
NFS4_LOCK_STID, &lock_stp);
- if (status)
- goto out;
- }
+ if (status)
+ goto out;
lock_sop = lockowner(lock_stp->st_stateowner);
lkflg = setlkflg(lock->lk_type);
@@ -4094,10 +4111,10 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
status = nfserr_grace;
- if (locks_in_grace() && !lock->lk_reclaim)
+ if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim)
goto out;
status = nfserr_no_grace;
- if (!locks_in_grace() && lock->lk_reclaim)
+ if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim)
goto out;
locks_init_lock(&file_lock);
@@ -4196,8 +4213,9 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct file_lock file_lock;
struct nfs4_lockowner *lo;
__be32 status;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
- if (locks_in_grace())
+ if (locks_in_grace(SVC_NET(rqstp)))
return nfserr_grace;
if (check_lock_length(lockt->lt_offset, lockt->lt_length))
@@ -4206,7 +4224,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfs4_lock_state();
status = nfserr_stale_clientid;
- if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid))
+ if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn))
goto out;
if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
@@ -4355,6 +4373,7 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp,
struct list_head matches;
unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
__be32 status;
+ struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
clid->cl_boot, clid->cl_id);
@@ -4362,7 +4381,7 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp,
/* XXX check for lease expiration */
status = nfserr_stale_clientid;
- if (STALE_CLIENTID(clid))
+ if (STALE_CLIENTID(clid, nn))
return status;
nfs4_lock_state();
@@ -4564,7 +4583,7 @@ void nfsd_forget_openowners(u64 num)
printk(KERN_INFO "NFSD: Forgot %d open owners", count);
}
-int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *))
+int nfsd_process_n_delegations(u64 num, struct list_head *list)
{
int i, count = 0;
struct nfs4_file *fp, *fnext;
@@ -4573,7 +4592,7 @@ int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegatio
for (i = 0; i < FILE_HASH_SIZE; i++) {
list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) {
list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) {
- deleg_func(dp);
+ list_move(&dp->dl_recall_lru, list);
if (++count == num)
return count;
}
@@ -4586,9 +4605,16 @@ int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegatio
void nfsd_forget_delegations(u64 num)
{
unsigned int count;
+ LIST_HEAD(victims);
+ struct nfs4_delegation *dp, *dnext;
+
+ spin_lock(&recall_lock);
+ count = nfsd_process_n_delegations(num, &victims);
+ spin_unlock(&recall_lock);
nfs4_lock_state();
- count = nfsd_process_n_delegations(num, unhash_delegation);
+ list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru)
+ unhash_delegation(dp);
nfs4_unlock_state();
printk(KERN_INFO "NFSD: Forgot %d delegations", count);
@@ -4597,12 +4623,16 @@ void nfsd_forget_delegations(u64 num)
void nfsd_recall_delegations(u64 num)
{
unsigned int count;
+ LIST_HEAD(victims);
+ struct nfs4_delegation *dp, *dnext;
- nfs4_lock_state();
spin_lock(&recall_lock);
- count = nfsd_process_n_delegations(num, nfsd_break_one_deleg);
+ count = nfsd_process_n_delegations(num, &victims);
+ list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) {
+ list_del(&dp->dl_recall_lru);
+ nfsd_break_one_deleg(dp);
+ }
spin_unlock(&recall_lock);
- nfs4_unlock_state();
printk(KERN_INFO "NFSD: Recalled %d delegations", count);
}
@@ -4665,6 +4695,8 @@ set_max_delegations(void)
int
nfs4_state_start(void)
{
+ struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int ret;
/*
@@ -4674,11 +4706,11 @@ nfs4_state_start(void)
* to that instead and then do most of the rest of this on a per-net
* basis.
*/
- get_net(&init_net);
- nfsd4_client_tracking_init(&init_net);
- boot_time = get_seconds();
- locks_start_grace(&nfsd4_manager);
- grace_ended = false;
+ get_net(net);
+ nfsd4_client_tracking_init(net);
+ nn->boot_time = get_seconds();
+ locks_start_grace(net, &nn->nfsd4_manager);
+ nn->grace_ended = false;
printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
nfsd4_grace);
ret = set_callback_cred();
@@ -4700,8 +4732,8 @@ nfs4_state_start(void)
out_free_laundry:
destroy_workqueue(laundry_wq);
out_recovery:
- nfsd4_client_tracking_exit(&init_net);
- put_net(&init_net);
+ nfsd4_client_tracking_exit(net);
+ put_net(net);
return ret;
}
@@ -4742,9 +4774,12 @@ __nfs4_state_shutdown(void)
void
nfs4_state_shutdown(void)
{
+ struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
cancel_delayed_work_sync(&laundromat_work);
destroy_workqueue(laundry_wq);
- locks_end_grace(&nfsd4_manager);
+ locks_end_grace(&nn->nfsd4_manager);
nfs4_lock_state();
__nfs4_state_shutdown();
nfs4_unlock_state();
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.