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-rw-r--r--fs/nfsd/export.c44
-rw-r--r--fs/nfsd/nfs4callback.c140
-rw-r--r--fs/nfsd/nfs4proc.c50
-rw-r--r--fs/nfsd/nfs4state.c376
-rw-r--r--fs/nfsd/nfs4xdr.c27
-rw-r--r--fs/nfsd/nfsctl.c64
-rw-r--r--fs/nfsd/nfsd.h6
-rw-r--r--fs/nfsd/nfssvc.c2
-rw-r--r--fs/nfsd/state.h47
-rw-r--r--fs/nfsd/vfs.c8
-rw-r--r--fs/nfsd/vfs.h1
-rw-r--r--fs/nfsd/xdr4.h11
12 files changed, 472 insertions, 304 deletions
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 872a5ef550c7..c2a4f71d87dd 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -259,10 +259,9 @@ static struct cache_detail svc_expkey_cache = {
.alloc = expkey_alloc,
};
-static struct svc_expkey *
-svc_expkey_lookup(struct svc_expkey *item)
+static int
+svc_expkey_hash(struct svc_expkey *item)
{
- struct cache_head *ch;
int hash = item->ek_fsidtype;
char * cp = (char*)item->ek_fsid;
int len = key_len(item->ek_fsidtype);
@@ -270,6 +269,14 @@ svc_expkey_lookup(struct svc_expkey *item)
hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS);
hash &= EXPKEY_HASHMASK;
+ return hash;
+}
+
+static struct svc_expkey *
+svc_expkey_lookup(struct svc_expkey *item)
+{
+ struct cache_head *ch;
+ int hash = svc_expkey_hash(item);
ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h,
hash);
@@ -283,13 +290,7 @@ static struct svc_expkey *
svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old)
{
struct cache_head *ch;
- int hash = new->ek_fsidtype;
- char * cp = (char*)new->ek_fsid;
- int len = key_len(new->ek_fsidtype);
-
- hash ^= hash_mem(cp, len, EXPKEY_HASHBITS);
- hash ^= hash_ptr(new->ek_client, EXPKEY_HASHBITS);
- hash &= EXPKEY_HASHMASK;
+ int hash = svc_expkey_hash(new);
ch = sunrpc_cache_update(&svc_expkey_cache, &new->h,
&old->h, hash);
@@ -738,14 +739,22 @@ struct cache_detail svc_export_cache = {
.alloc = svc_export_alloc,
};
-static struct svc_export *
-svc_export_lookup(struct svc_export *exp)
+static int
+svc_export_hash(struct svc_export *exp)
{
- struct cache_head *ch;
int hash;
+
hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS);
hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS);
hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS);
+ return hash;
+}
+
+static struct svc_export *
+svc_export_lookup(struct svc_export *exp)
+{
+ struct cache_head *ch;
+ int hash = svc_export_hash(exp);
ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h,
hash);
@@ -759,10 +768,7 @@ static struct svc_export *
svc_export_update(struct svc_export *new, struct svc_export *old)
{
struct cache_head *ch;
- int hash;
- hash = hash_ptr(old->ex_client, EXPORT_HASHBITS);
- hash ^= hash_ptr(old->ex_path.dentry, EXPORT_HASHBITS);
- hash ^= hash_ptr(old->ex_path.mnt, EXPORT_HASHBITS);
+ int hash = svc_export_hash(old);
ch = sunrpc_cache_update(&svc_export_cache, &new->h,
&old->h,
@@ -1071,9 +1077,9 @@ exp_export(struct nfsctl_export *nxp)
err = 0;
finish:
kfree(new.ex_pathname);
- if (exp)
+ if (!IS_ERR_OR_NULL(exp))
exp_put(exp);
- if (fsid_key && !IS_ERR(fsid_key))
+ if (!IS_ERR_OR_NULL(fsid_key))
cache_put(&fsid_key->h, &svc_expkey_cache);
path_put(&path);
out_put_clp:
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 7e32bd394e86..eb78e7e22077 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -32,6 +32,7 @@
*/
#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/svc_xprt.h>
#include <linux/slab.h>
#include "nfsd.h"
#include "state.h"
@@ -79,11 +80,6 @@ enum nfs_cb_opnum4 {
cb_sequence_dec_sz + \
op_dec_sz)
-struct nfs4_rpc_args {
- void *args_op;
- struct nfsd4_cb_sequence args_seq;
-};
-
/*
* Generic encode routines from fs/nfs/nfs4xdr.c
*/
@@ -428,13 +424,19 @@ static struct rpc_procinfo nfs4_cb_procedures[] = {
};
static struct rpc_version nfs_cb_version4 = {
+/*
+ * Note on the callback rpc program version number: despite language in rfc
+ * 5661 section 18.36.3 requiring servers to use 4 in this field, the
+ * official xdr descriptions for both 4.0 and 4.1 specify version 1, and
+ * in practice that appears to be what implementations use. The section
+ * 18.36.3 language is expected to be fixed in an erratum.
+ */
.number = 1,
.nrprocs = ARRAY_SIZE(nfs4_cb_procedures),
.procs = nfs4_cb_procedures
};
static struct rpc_version * nfs_cb_version[] = {
- NULL,
&nfs_cb_version4,
};
@@ -456,15 +458,14 @@ static struct rpc_program cb_program = {
static int max_cb_time(void)
{
- return max(NFSD_LEASE_TIME/10, (time_t)1) * HZ;
+ return max(nfsd4_lease/10, (time_t)1) * HZ;
}
/* Reference counting, callback cleanup, etc., all look racy as heck.
- * And why is cb_set an atomic? */
+ * And why is cl_cb_set an atomic? */
-int setup_callback_client(struct nfs4_client *clp)
+int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *cb)
{
- struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
struct rpc_timeout timeparms = {
.to_initval = max_cb_time(),
.to_retries = 0,
@@ -476,7 +477,7 @@ int setup_callback_client(struct nfs4_client *clp)
.timeout = &timeparms,
.program = &cb_program,
.prognumber = cb->cb_prog,
- .version = nfs_cb_version[1]->number,
+ .version = 0,
.authflavor = clp->cl_flavor,
.flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
.client_name = clp->cl_principal,
@@ -486,7 +487,7 @@ int setup_callback_client(struct nfs4_client *clp)
if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
return -EINVAL;
if (cb->cb_minorversion) {
- args.bc_xprt = clp->cl_cb_xprt;
+ args.bc_xprt = cb->cb_xprt;
args.protocol = XPRT_TRANSPORT_BC_TCP;
}
/* Create RPC client */
@@ -496,7 +497,7 @@ int setup_callback_client(struct nfs4_client *clp)
PTR_ERR(client));
return PTR_ERR(client);
}
- cb->cb_client = client;
+ nfsd4_set_callback_client(clp, client);
return 0;
}
@@ -514,8 +515,7 @@ static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
if (task->tk_status)
warn_no_callback_path(clp, task->tk_status);
else
- atomic_set(&clp->cl_cb_conn.cb_set, 1);
- put_nfs4_client(clp);
+ atomic_set(&clp->cl_cb_set, 1);
}
static const struct rpc_call_ops nfsd4_cb_probe_ops = {
@@ -537,7 +537,6 @@ int set_callback_cred(void)
void do_probe_callback(struct nfs4_client *clp)
{
- struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
struct rpc_message msg = {
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
.rpc_argp = clp,
@@ -545,34 +544,27 @@ void do_probe_callback(struct nfs4_client *clp)
};
int status;
- status = rpc_call_async(cb->cb_client, &msg,
+ status = rpc_call_async(clp->cl_cb_client, &msg,
RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
&nfsd4_cb_probe_ops, (void *)clp);
- if (status) {
+ if (status)
warn_no_callback_path(clp, status);
- put_nfs4_client(clp);
- }
}
/*
* Set up the callback client and put a NFSPROC4_CB_NULL on the wire...
*/
-void
-nfsd4_probe_callback(struct nfs4_client *clp)
+void nfsd4_probe_callback(struct nfs4_client *clp, struct nfs4_cb_conn *cb)
{
int status;
- BUG_ON(atomic_read(&clp->cl_cb_conn.cb_set));
+ BUG_ON(atomic_read(&clp->cl_cb_set));
- status = setup_callback_client(clp);
+ status = setup_callback_client(clp, cb);
if (status) {
warn_no_callback_path(clp, status);
return;
}
-
- /* the task holds a reference to the nfs4_client struct */
- atomic_inc(&clp->cl_count);
-
do_probe_callback(clp);
}
@@ -658,18 +650,32 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
}
}
+
static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
{
struct nfs4_delegation *dp = calldata;
struct nfs4_client *clp = dp->dl_client;
+ struct rpc_clnt *current_rpc_client = clp->cl_cb_client;
nfsd4_cb_done(task, calldata);
+ if (current_rpc_client == NULL) {
+ /* We're shutting down; give up. */
+ /* XXX: err, or is it ok just to fall through
+ * and rpc_restart_call? */
+ return;
+ }
+
switch (task->tk_status) {
case -EIO:
/* Network partition? */
- atomic_set(&clp->cl_cb_conn.cb_set, 0);
+ atomic_set(&clp->cl_cb_set, 0);
warn_no_callback_path(clp, task->tk_status);
+ if (current_rpc_client != task->tk_client) {
+ /* queue a callback on the new connection: */
+ nfsd4_cb_recall(dp);
+ return;
+ }
case -EBADHANDLE:
case -NFS4ERR_BAD_STATEID:
/* Race: client probably got cb_recall
@@ -677,7 +683,7 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
break;
default:
/* success, or error we can't handle */
- goto done;
+ return;
}
if (dp->dl_retries--) {
rpc_delay(task, 2*HZ);
@@ -685,20 +691,16 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
rpc_restart_call(task);
return;
} else {
- atomic_set(&clp->cl_cb_conn.cb_set, 0);
+ atomic_set(&clp->cl_cb_set, 0);
warn_no_callback_path(clp, task->tk_status);
}
-done:
- kfree(task->tk_msg.rpc_argp);
}
static void nfsd4_cb_recall_release(void *calldata)
{
struct nfs4_delegation *dp = calldata;
- struct nfs4_client *clp = dp->dl_client;
nfs4_put_delegation(dp);
- put_nfs4_client(clp);
}
static const struct rpc_call_ops nfsd4_cb_recall_ops = {
@@ -707,33 +709,75 @@ static const struct rpc_call_ops nfsd4_cb_recall_ops = {
.rpc_release = nfsd4_cb_recall_release,
};
+static struct workqueue_struct *callback_wq;
+
+int nfsd4_create_callback_queue(void)
+{
+ callback_wq = create_singlethread_workqueue("nfsd4_callbacks");
+ if (!callback_wq)
+ return -ENOMEM;
+ return 0;
+}
+
+void nfsd4_destroy_callback_queue(void)
+{
+ destroy_workqueue(callback_wq);
+}
+
+/* must be called under the state lock */
+void nfsd4_set_callback_client(struct nfs4_client *clp, struct rpc_clnt *new)
+{
+ struct rpc_clnt *old = clp->cl_cb_client;
+
+ clp->cl_cb_client = new;
+ /*
+ * After this, any work that saw the old value of cl_cb_client will
+ * be gone:
+ */
+ flush_workqueue(callback_wq);
+ /* So we can safely shut it down: */
+ if (old)
+ rpc_shutdown_client(old);
+}
+
/*
* called with dp->dl_count inc'ed.
*/
-void
-nfsd4_cb_recall(struct nfs4_delegation *dp)
+static void _nfsd4_cb_recall(struct nfs4_delegation *dp)
{
struct nfs4_client *clp = dp->dl_client;
- struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client;
- struct nfs4_rpc_args *args;
+ struct rpc_clnt *clnt = clp->cl_cb_client;
+ struct nfs4_rpc_args *args = &dp->dl_recall.cb_args;
struct rpc_message msg = {
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL],
.rpc_cred = callback_cred
};
- int status = -ENOMEM;
+ int status;
+
+ if (clnt == NULL)
+ return; /* Client is shutting down; give up. */
- args = kzalloc(sizeof(*args), GFP_KERNEL);
- if (!args)
- goto out;
args->args_op = dp;
msg.rpc_argp = args;
dp->dl_retries = 1;
status = rpc_call_async(clnt, &msg, RPC_TASK_SOFT,
&nfsd4_cb_recall_ops, dp);
-out:
- if (status) {
- kfree(args);
- put_nfs4_client(clp);
+ if (status)
nfs4_put_delegation(dp);
- }
+}
+
+void nfsd4_do_callback_rpc(struct work_struct *w)
+{
+ /* XXX: for now, just send off delegation recall. */
+ /* In future, generalize to handle any sort of callback. */
+ struct nfsd4_callback *c = container_of(w, struct nfsd4_callback, cb_work);
+ struct nfs4_delegation *dp = container_of(c, struct nfs4_delegation, dl_recall);
+
+ _nfsd4_cb_recall(dp);
+}
+
+
+void nfsd4_cb_recall(struct nfs4_delegation *dp)
+{
+ queue_work(callback_wq, &dp->dl_recall.cb_work);
}
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 2ab9e8501bfe..59ec449b0c7f 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -969,20 +969,36 @@ static struct nfsd4_operation nfsd4_ops[];
static const char *nfsd4_op_name(unsigned opnum);
/*
- * Enforce NFSv4.1 COMPOUND ordering rules.
+ * Enforce NFSv4.1 COMPOUND ordering rules:
*
- * TODO:
- * - enforce NFS4ERR_NOT_ONLY_OP,
- * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
+ * Also note, enforced elsewhere:
+ * - SEQUENCE other than as first op results in
+ * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
+ * - BIND_CONN_TO_SESSION must be the only op in its compound
+ * (Will be enforced in nfsd4_bind_conn_to_session().)
+ * - DESTROY_SESSION must be the final operation in a compound, if
+ * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
+ * (Enforced in nfsd4_destroy_session().)
*/
-static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
+static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
{
- if (args->minorversion && args->opcnt > 0) {
- struct nfsd4_op *op = &args->ops[0];
- return (op->status == nfserr_op_illegal) ||
- (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
- }
- return true;
+ struct nfsd4_op *op = &args->ops[0];
+
+ /* These ordering requirements don't apply to NFSv4.0: */
+ if (args->minorversion == 0)
+ return nfs_ok;
+ /* This is weird, but OK, not our problem: */
+ if (args->opcnt == 0)
+ return nfs_ok;
+ if (op->status == nfserr_op_illegal)
+ return nfs_ok;
+ if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
+ return nfserr_op_not_in_session;
+ if (op->opnum == OP_SEQUENCE)
+ return nfs_ok;
+ if (args->opcnt != 1)
+ return nfserr_not_only_op;
+ return nfs_ok;
}
/*
@@ -1012,6 +1028,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
resp->rqstp = rqstp;
resp->cstate.minorversion = args->minorversion;
resp->cstate.replay_owner = NULL;
+ resp->cstate.session = NULL;
fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
/* Use the deferral mechanism only for NFSv4.0 compounds */
@@ -1024,13 +1041,13 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
if (args->minorversion > nfsd_supported_minorversion)
goto out;
- if (!nfs41_op_ordering_ok(args)) {
+ status = nfs41_check_op_ordering(args);
+ if (status) {
op = &args->ops[0];
- op->status = nfserr_sequence_pos;
+ op->status = status;
goto encode_op;
}
- status = nfs_ok;
while (!status && resp->opcnt < args->opcnt) {
op = &args->ops[resp->opcnt++];
@@ -1295,6 +1312,11 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
.op_name = "OP_SEQUENCE",
},
+ [OP_RECLAIM_COMPLETE] = {
+ .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
+ .op_flags = ALLOWED_WITHOUT_FH,
+ .op_name = "OP_RECLAIM_COMPLETE",
+ },
};
static const char *nfsd4_op_name(unsigned opnum)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6a8fedaa4f55..12f7109720c2 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -45,8 +45,8 @@
#define NFSDDBG_FACILITY NFSDDBG_PROC
/* Globals */
-static time_t lease_time = 90; /* default lease time */
-static time_t user_lease_time = 90;
+time_t nfsd4_lease = 90; /* default lease time */
+time_t nfsd4_grace = 90;
static time_t boot_time;
static u32 current_ownerid = 1;
static u32 current_fileid = 1;
@@ -190,7 +190,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f
dp->dl_vfs_file = stp->st_vfs_file;
dp->dl_type = type;
dp->dl_ident = cb->cb_ident;
- dp->dl_stateid.si_boot = get_seconds();
+ dp->dl_stateid.si_boot = boot_time;
dp->dl_stateid.si_stateownerid = current_delegid++;
dp->dl_stateid.si_fileid = 0;
dp->dl_stateid.si_generation = 0;
@@ -199,6 +199,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f
atomic_set(&dp->dl_count, 1);
list_add(&dp->dl_perfile, &fp->fi_delegations);
list_add(&dp->dl_perclnt, &clp->cl_delegations);
+ INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc);
return dp;
}
@@ -249,6 +250,9 @@ unhash_delegation(struct nfs4_delegation *dp)
* SETCLIENTID state
*/
+/* client_lock protects the client lru list and session hash table */
+static DEFINE_SPINLOCK(client_lock);
+
/* Hash tables for nfs4_clientid state */
#define CLIENT_HASH_BITS 4
#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
@@ -367,7 +371,6 @@ static void release_openowner(struct nfs4_stateowner *sop)
nfs4_put_stateowner(sop);
}
-static DEFINE_SPINLOCK(sessionid_lock);
#define SESSION_HASH_SIZE 512
static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE];
@@ -565,10 +568,10 @@ alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp,
new->se_flags = cses->flags;
kref_init(&new->se_ref);
- spin_lock(&sessionid_lock);
+ spin_lock(&client_lock);
list_add(&new->se_hash, &sessionid_hashtbl[idx]);
list_add(&new->se_perclnt, &clp->cl_sessions);
- spin_unlock(&sessionid_lock);
+ spin_unlock(&client_lock);
status = nfs_ok;
out:
@@ -579,7 +582,7 @@ out_free:
goto out;
}
-/* caller must hold sessionid_lock */
+/* caller must hold client_lock */
static struct nfsd4_session *
find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid)
{
@@ -602,7 +605,7 @@ find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid)
return NULL;
}
-/* caller must hold sessionid_lock */
+/* caller must hold client_lock */
static void
unhash_session(struct nfsd4_session *ses)
{
@@ -610,15 +613,6 @@ unhash_session(struct nfsd4_session *ses)
list_del(&ses->se_perclnt);
}
-static void
-release_session(struct nfsd4_session *ses)
-{
- spin_lock(&sessionid_lock);
- unhash_session(ses);
- spin_unlock(&sessionid_lock);
- nfsd4_put_session(ses);
-}
-
void
free_session(struct kref *kref)
{
@@ -634,9 +628,18 @@ free_session(struct kref *kref)
kfree(ses);
}
+/* must be called under the client_lock */
static inline void
-renew_client(struct nfs4_client *clp)
+renew_client_locked(struct nfs4_client *clp)
{
+ if (is_client_expired(clp)) {
+ dprintk("%s: client (clientid %08x/%08x) already expired\n",
+ __func__,
+ clp->cl_clientid.cl_boot,
+ clp->cl_clientid.cl_id);
+ return;
+ }
+
/*
* Move client to the end to the LRU list.
*/
@@ -647,6 +650,14 @@ renew_client(struct nfs4_client *clp)
clp->cl_time = get_seconds();
}
+static inline void
+renew_client(struct nfs4_client *clp)
+{
+ spin_lock(&client_lock);
+ renew_client_locked(clp);
+ spin_unlock(&client_lock);
+}
+
/* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
static int
STALE_CLIENTID(clientid_t *clid)
@@ -680,27 +691,9 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
return clp;
}
-static void
-shutdown_callback_client(struct nfs4_client *clp)
-{
- struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client;
-
- if (clnt) {
- /*
- * Callback threads take a reference on the client, so there
- * should be no outstanding callbacks at this point.
- */
- clp->cl_cb_conn.cb_client = NULL;
- rpc_shutdown_client(clnt);
- }
-}
-
static inline void
free_client(struct nfs4_client *clp)
{
- shutdown_callback_client(clp);
- if (clp->cl_cb_xprt)
- svc_xprt_put(clp->cl_cb_xprt);
if (clp->cl_cred.cr_group_info)
put_group_info(clp->cl_cred.cr_group_info);
kfree(clp->cl_principal);
@@ -709,10 +702,34 @@ free_client(struct nfs4_client *clp)
}
void
-put_nfs4_client(struct nfs4_client *clp)
+release_session_client(struct nfsd4_session *session)
{
- if (atomic_dec_and_test(&clp->cl_count))
+ struct nfs4_client *clp = session->se_client;
+
+ if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock))
+ return;
+ if (is_client_expired(clp)) {
free_client(clp);
+ session->se_client = NULL;
+ } else
+ renew_client_locked(clp);
+ spin_unlock(&client_lock);
+ nfsd4_put_session(session);
+}
+
+/* must be called under the client_lock */
+static inline void
+unhash_client_locked(struct nfs4_client *clp)
+{
+ mark_client_expired(clp);
+ list_del(&clp->cl_lru);
+ while (!list_empty(&clp->cl_sessions)) {
+ struct nfsd4_session *ses;
+ ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
+ se_perclnt);
+ unhash_session(ses);
+ nfsd4_put_session(ses);
+ }
}
static void
@@ -722,9 +739,6 @@ expire_client(struct nfs4_client *clp)
struct nfs4_delegation *dp;
struct list_head reaplist;
- dprintk("NFSD: expire_client cl_count %d\n",
- atomic_read(&clp->cl_count));
-
INIT_LIST_HEAD(&reaplist);
spin_lock(&recall_lock);
while (!list_empty(&clp->cl_delegations)) {
@@ -740,20 +754,20 @@ expire_client(struct nfs4_client *clp)
list_del_init(&dp->dl_recall_lru);
unhash_delegation(dp);
}
- list_del(&clp->cl_idhash);
- list_del(&clp->cl_strhash);
- list_del(&clp->cl_lru);
while (!list_empty(&clp->cl_openowners)) {
sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient);
release_openowner(sop);
}
- while (!list_empty(&clp->cl_sessions)) {
- struct nfsd4_session *ses;
- ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
- se_perclnt);
- release_session(ses);
- }
- put_nfs4_client(clp);
+ nfsd4_set_callback_client(clp, NULL);
+ if (clp->cl_cb_conn.cb_xprt)
+ svc_xprt_put(clp->cl_cb_conn.cb_xprt);
+ list_del(&clp->cl_idhash);
+ list_del(&clp->cl_strhash);
+ spin_lock(&client_lock);
+ unhash_client_locked(clp);
+ if (atomic_read(&clp->cl_refcount) == 0)
+ free_client(clp);
+ spin_unlock(&client_lock);
}
static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
@@ -839,14 +853,15 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir,
}
memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
- atomic_set(&clp->cl_count, 1);
- atomic_set(&clp->cl_cb_conn.cb_set, 0);
+ atomic_set(&clp->cl_refcount, 0);
+ atomic_set(&clp->cl_cb_set, 0);
INIT_LIST_HEAD(&clp->cl_idhash);
INIT_LIST_HEAD(&clp->cl_strhash);
INIT_LIST_HEAD(&clp->cl_openowners);
INIT_LIST_HEAD(&clp->cl_delegations);
INIT_LIST_HEAD(&clp->cl_sessions);
INIT_LIST_HEAD(&clp->cl_lru);
+ clp->cl_time = get_seconds();
clear_bit(0, &clp->cl_cb_slot_busy);
rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
copy_verf(clp, verf);
@@ -877,8 +892,7 @@ add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
idhashval = clientid_hashval(clp->cl_clientid.cl_id);
list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
- list_add_tail(&clp->cl_lru, &client_lru);
- clp->cl_time = get_seconds();
+ renew_client(clp);
}
static void
@@ -888,10 +902,9 @@ move_to_confirmed(struct nfs4_client *clp)
unsigned int strhashval;
dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
- list_del_init(&clp->cl_strhash);
list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
strhashval = clientstr_hashval(clp->cl_recdir);
- list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
+ list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
renew_client(clp);
}
@@ -1327,15 +1340,9 @@ nfsd4_create_session(struct svc_rqst *rqstp,
cs_slot->sl_seqid++; /* from 0 to 1 */
move_to_confirmed(unconf);
- /*
- * We do not support RDMA or persistent sessions
- */
- cr_ses->flags &= ~SESSION4_PERSIST;
- cr_ses->flags &= ~SESSION4_RDMA;
-
if (cr_ses->flags & SESSION4_BACK_CHAN) {
- unconf->cl_cb_xprt = rqstp->rq_xprt;
- svc_xprt_get(unconf->cl_cb_xprt);
+ unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt;
+ svc_xprt_get(rqstp->rq_xprt);
rpc_copy_addr(
(struct sockaddr *)&unconf->cl_cb_conn.cb_addr,
sa);
@@ -1344,7 +1351,7 @@ nfsd4_create_session(struct svc_rqst *rqstp,
cstate->minorversion;
unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog;
unconf->cl_cb_seq_nr = 1;
- nfsd4_probe_callback(unconf);
+ nfsd4_probe_callback(unconf, &unconf->cl_cb_conn);
}
conf = unconf;
} else {
@@ -1352,6 +1359,12 @@ nfsd4_create_session(struct svc_rqst *rqstp,
goto out;
}
+ /*
+ * We do not support RDMA or persistent sessions
+ */
+ cr_ses->flags &= ~SESSION4_PERSIST;
+ cr_ses->flags &= ~SESSION4_RDMA;
+
status = alloc_init_session(rqstp, conf, cr_ses);
if (status)
goto out;
@@ -1369,6 +1382,21 @@ out:
return status;
}
+static bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
+{
+ struct nfsd4_compoundres *resp = rqstp->rq_resp;
+ struct nfsd4_compoundargs *argp = rqstp->rq_argp;
+
+ return argp->opcnt == resp->opcnt;
+}
+
+static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
+{
+ if (!session)
+ return 0;
+ return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
+}
+
__be32
nfsd4_destroy_session(struct svc_rqst *r,
struct nfsd4_compound_state *cstate,
@@ -1384,19 +1412,25 @@ nfsd4_destroy_session(struct svc_rqst *r,
* - Do we need to clear any callback info from previous session?
*/
+ if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
+ if (!nfsd4_last_compound_op(r))
+ return nfserr_not_only_op;
+ }
dump_sessionid(__func__, &sessionid->sessionid);
- spin_lock(&sessionid_lock);
+ spin_lock(&client_lock);
ses = find_in_sessionid_hashtbl(&sessionid->sessionid);
if (!ses) {
- spin_unlock(&sessionid_lock);
+ spin_unlock(&client_lock);
goto out;
}
unhash_session(ses);
- spin_unlock(&sessionid_lock);
+ spin_unlock(&client_lock);
+ nfs4_lock_state();
/* wait for callbacks */
- shutdown_callback_client(ses->se_client);
+ nfsd4_set_callback_client(ses->se_client, NULL);
+ nfs4_unlock_state();
nfsd4_put_session(ses);
status = nfs_ok;
out:
@@ -1417,7 +1451,7 @@ nfsd4_sequence(struct svc_rqst *rqstp,
if (resp->opcnt != 1)
return nfserr_sequence_pos;
- spin_lock(&sessionid_lock);
+ spin_lock(&client_lock);
status = nfserr_badsession;
session = find_in_sessionid_hashtbl(&seq->sessionid);
if (!session)
@@ -1456,23 +1490,47 @@ nfsd4_sequence(struct svc_rqst *rqstp,
cstate->slot = slot;
cstate->session = session;
- /* Hold a session reference until done processing the compound:
- * nfsd4_put_session called only if the cstate slot is set.
- */
- nfsd4_get_session(session);
out:
- spin_unlock(&sessionid_lock);
- /* Renew the clientid on success and on replay */
+ /* Hold a session reference until done processing the compound. */
if (cstate->session) {
- nfs4_lock_state();
- renew_client(session->se_client);
- nfs4_unlock_state();
+ nfsd4_get_session(cstate->session);
+ atomic_inc(&session->se_client->cl_refcount);
}
+ spin_unlock(&client_lock);
dprintk("%s: return %d\n", __func__, ntohl(status));
return status;
}
__be32
+nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
+{
+ if (rc->rca_one_fs) {
+ if (!cstate->current_fh.fh_dentry)
+ return nfserr_nofilehandle;
+ /*
+ * We don't take advantage of the rca_one_fs case.
+ * That's OK, it's optional, we can safely ignore it.
+ */
+ return nfs_ok;
+ }
+ nfs4_lock_state();
+ if (is_client_expired(cstate->session->se_client)) {
+ nfs4_unlock_state();
+ /*
+ * The following error isn't really legal.
+ * But we only get here if the client just explicitly
+ * destroyed the client. Surely it no longer cares what
+ * error it gets back on an operation for the dead
+ * client.
+ */
+ return nfserr_stale_clientid;
+ }
+ nfsd4_create_clid_dir(cstate->session->se_client);
+ nfs4_unlock_state();
+ return nfs_ok;
+}
+
+__be32
nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_setclientid *setclid)
{
@@ -1631,9 +1689,8 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
status = nfserr_clid_inuse;
else {
- /* XXX: We just turn off callbacks until we can handle
- * change request correctly. */
- atomic_set(&conf->cl_cb_conn.cb_set, 0);
+ atomic_set(&conf->cl_cb_set, 0);
+ nfsd4_probe_callback(conf, &unconf->cl_cb_conn);
expire_client(unconf);
status = nfs_ok;
@@ -1667,7 +1724,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
}
move_to_confirmed(unconf);
conf = unconf;
- nfsd4_probe_callback(conf);
+ nfsd4_probe_callback(conf, &conf->cl_cb_conn);
status = nfs_ok;
}
} else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
@@ -1700,12 +1757,12 @@ alloc_init_file(struct inode *ino)
INIT_LIST_HEAD(&fp->fi_hash);
INIT_LIST_HEAD(&fp->fi_stateids);
INIT_LIST_HEAD(&fp->fi_delegations);
- spin_lock(&recall_lock);
- list_add(&fp->fi_hash, &file_hashtbl[hashval]);
- spin_unlock(&recall_lock);
fp->fi_inode = igrab(ino);
fp->fi_id = current_fileid++;
fp->fi_had_conflict = false;
+ spin_lock(&recall_lock);
+ list_add(&fp->fi_hash, &file_hashtbl[hashval]);
+ spin_unlock(&recall_lock);
return fp;
}
return NULL;
@@ -1827,7 +1884,7 @@ init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *
stp->st_stateowner = sop;
get_nfs4_file(fp);
stp->st_file = fp;
- stp->st_stateid.si_boot = get_seconds();
+ stp->st_stateid.si_boot = boot_time;
stp->st_stateid.si_stateownerid = sop->so_id;
stp->st_stateid.si_fileid = fp->fi_id;
stp->st_stateid.si_generation = 0;
@@ -2028,7 +2085,6 @@ void nfsd_break_deleg_cb(struct file_lock *fl)
* lock) we know the server hasn't removed the lease yet, we know
* it's safe to take a reference: */
atomic_inc(&dp->dl_count);
- atomic_inc(&dp->dl_client->cl_count);
spin_lock(&recall_lock);
list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
@@ -2347,7 +2403,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
{
struct nfs4_delegation *dp;
struct nfs4_stateowner *sop = stp->st_stateowner;
- struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn;
+ int cb_up = atomic_read(&sop->so_client->cl_cb_set);
struct file_lock fl, *flp = &fl;
int status, flag = 0;
@@ -2355,7 +2411,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
open->op_recall = 0;
switch (open->op_claim_type) {
case NFS4_OPEN_CLAIM_PREVIOUS:
- if (!atomic_read(&cb->cb_set))
+ if (!cb_up)
open->op_recall = 1;
flag = open->op_delegate_type;
if (flag == NFS4_OPEN_DELEGATE_NONE)
@@ -2366,7 +2422,7 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
* had the chance to reclaim theirs.... */
if (locks_in_grace())
goto out;
- if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
+ if (!cb_up || !sop->so_confirmed)
goto out;
if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
flag = NFS4_OPEN_DELEGATE_WRITE;
@@ -2483,10 +2539,8 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
}
memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
- if (nfsd4_has_session(&resp->cstate)) {
+ if (nfsd4_has_session(&resp->cstate))
open->op_stateowner->so_confirmed = 1;
- nfsd4_create_clid_dir(open->op_stateowner->so_client);
- }
/*
* Attempt to hand out a delegation. No error return, because the
@@ -2537,7 +2591,7 @@ nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
renew_client(clp);
status = nfserr_cb_path_down;
if (!list_empty(&clp->cl_delegations)
- && !atomic_read(&clp->cl_cb_conn.cb_set))
+ && !atomic_read(&clp->cl_cb_set))
goto out;
status = nfs_ok;
out:
@@ -2554,6 +2608,12 @@ nfsd4_end_grace(void)
dprintk("NFSD: end of grace period\n");
nfsd4_recdir_purge_old();
locks_end_grace(&nfsd4_manager);
+ /*
+ * Now that every NFSv4 client has had the chance to recover and
+ * to see the (possibly new, possibly shorter) lease time, we
+ * can safely set the next grace time to the current lease time:
+ */
+ nfsd4_grace = nfsd4_lease;
}
static time_t
@@ -2563,15 +2623,17 @@ nfs4_laundromat(void)
struct nfs4_stateowner *sop;
struct nfs4_delegation *dp;
struct list_head *pos, *next, reaplist;
- time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
- time_t t, clientid_val = NFSD_LEASE_TIME;
- time_t u, test_val = NFSD_LEASE_TIME;
+ time_t cutoff = get_seconds() - nfsd4_lease;
+ time_t t, clientid_val = nfsd4_lease;
+ time_t u, test_val = nfsd4_lease;
nfs4_lock_state();
dprintk("NFSD: laundromat service - starting\n");
if (locks_in_grace())
nfsd4_end_grace();
+ INIT_LIST_HEAD(&reaplist);
+ spin_lock(&client_lock);
list_for_each_safe(pos, next, &client_lru) {
clp = list_entry(pos, struct nfs4_client, cl_lru);
if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
@@ -2580,12 +2642,22 @@ nfs4_laundromat(void)
clientid_val = t;
break;
}
+ if (atomic_read(&clp->cl_refcount)) {
+ dprintk("NFSD: client in use (clientid %08x)\n",
+ clp->cl_clientid.cl_id);
+ continue;
+ }
+ unhash_client_locked(clp);
+ list_add(&clp->cl_lru, &reaplist);
+ }
+ spin_unlock(&client_lock);
+ list_for_each_safe(pos, next, &reaplist) {
+ clp = list_entry(pos, struct nfs4_client, cl_lru);
dprintk("NFSD: purging unused client (clientid %08x)\n",
clp->cl_clientid.cl_id);
nfsd4_remove_clid_dir(clp);
expire_client(clp);
}
- INIT_LIST_HEAD(&reaplist);
spin_lock(&recall_lock);
list_for_each_safe(pos, next, &del_recall_lru) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
@@ -2605,7 +2677,7 @@ nfs4_laundromat(void)
list_del_init(&dp->dl_recall_lru);
unhash_delegation(dp);
}
- test_val = NFSD_LEASE_TIME;
+ test_val = nfsd4_lease;
list_for_each_safe(pos, next, &close_lru) {
sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
@@ -2661,39 +2733,11 @@ nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
static int
STALE_STATEID(stateid_t *stateid)
{
- if (time_after((unsigned long)boot_time,
- (unsigned long)stateid->si_boot)) {
- dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
- STATEID_VAL(stateid));
- return 1;
- }
- return 0;
-}
-
-static int
-EXPIRED_STATEID(stateid_t *stateid)
-{
- if (time_before((unsigned long)boot_time,
- ((unsigned long)stateid->si_boot)) &&
- time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) {
- dprintk("NFSD: expired stateid " STATEID_FMT "!\n",
- STATEID_VAL(stateid));
- return 1;
- }
- return 0;
-}
-
-static __be32
-stateid_error_map(stateid_t *stateid)
-{
- if (STALE_STATEID(stateid))
- return nfserr_stale_stateid;
- if (EXPIRED_STATEID(stateid))
- return nfserr_expired;
-
- dprintk("NFSD: bad stateid " STATEID_FMT "!\n",
+ if (stateid->si_boot == boot_time)
+ return 0;
+ dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
STATEID_VAL(stateid));
- return nfserr_bad_stateid;
+ return 1;
}
static inline int
@@ -2817,10 +2861,8 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
status = nfserr_bad_stateid;
if (is_delegation_stateid(stateid)) {
dp = find_delegation_stateid(ino, stateid);
- if (!dp) {
- status = stateid_error_map(stateid);
+ if (!dp)
goto out;
- }
status = check_stateid_generation(stateid, &dp->dl_stateid,
flags);
if (status)
@@ -2833,10 +2875,8 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
*filpp = dp->dl_vfs_file;
} else { /* open or lock stateid */
stp = find_stateid(stateid, flags);
- if (!stp) {
- status = stateid_error_map(stateid);
+ if (!stp)
goto out;
- }
if (nfs4_check_fh(current_fh, stp))
goto out;
if (!stp->st_stateowner->so_confirmed)
@@ -2908,7 +2948,7 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
*/
sop = search_close_lru(stateid->si_stateownerid, flags);
if (sop == NULL)
- return stateid_error_map(stateid);
+ return nfserr_bad_stateid;
*sopp = sop;
goto check_replay;
}
@@ -3175,10 +3215,8 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (!is_delegation_stateid(stateid))
goto out;
dp = find_delegation_stateid(inode, stateid);
- if (!dp) {
- status = stateid_error_map(stateid);
+ if (!dp)
goto out;
- }
status = check_stateid_generation(stateid, &dp->dl_stateid, flags);
if (status)
goto out;
@@ -3404,7 +3442,7 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc
stp->st_stateowner = sop;
get_nfs4_file(fp);
stp->st_file = fp;
- stp->st_stateid.si_boot = get_seconds();
+ stp->st_stateid.si_boot = boot_time;
stp->st_stateid.si_stateownerid = sop->so_id;
stp->st_stateid.si_fileid = fp->fi_id;
stp->st_stateid.si_generation = 0;
@@ -3976,12 +4014,6 @@ nfsd4_load_reboot_recovery_data(void)
printk("NFSD: Failure reading reboot recovery data\n");
}
-unsigned long
-get_nfs4_grace_period(void)
-{
- return max(user_lease_time, lease_time) * HZ;
-}
-
/*
* Since the lifetime of a delegation isn't limited to that of an open, a
* client may quite reasonably hang on to a delegation as long as it has
@@ -4008,20 +4040,27 @@ set_max_delegations(void)
static int
__nfs4_state_start(void)
{
- unsigned long grace_time;
+ int ret;
boot_time = get_seconds();
- grace_time = get_nfs4_grace_period();
- lease_time = user_lease_time;
locks_start_grace(&nfsd4_manager);
printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
- grace_time/HZ);
+ nfsd4_grace);
+ ret = set_callback_cred();
+ if (ret)
+ return -ENOMEM;
laundry_wq = create_singlethread_workqueue("nfsd4");
if (laundry_wq == NULL)
return -ENOMEM;
- queue_delayed_work(laundry_wq, &laundromat_work, grace_time);
+ ret = nfsd4_create_callback_queue();
+ if (ret)
+ goto out_free_laundry;
+ queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ);
set_max_delegations();
- return set_callback_cred();
+ return 0;
+out_free_laundry:
+ destroy_workqueue(laundry_wq);
+ return ret;
}
int
@@ -4039,12 +4078,6 @@ nfs4_state_start(void)
return 0;
}
-time_t
-nfs4_lease_time(void)
-{
- return lease_time;
-}
-
static void
__nfs4_state_shutdown(void)
{
@@ -4089,6 +4122,7 @@ nfs4_state_shutdown(void)
nfs4_lock_state();
nfs4_release_reclaim();
__nfs4_state_shutdown();
+ nfsd4_destroy_callback_queue();
nfs4_unlock_state();
}
@@ -4128,21 +4162,3 @@ nfs4_recoverydir(void)
{
return user_recovery_dirname;
}
-
-/*
- * Called when leasetime is changed.
- *
- * The only way the protocol gives us to handle on-the-fly lease changes is to
- * simulate a reboot. Instead of doing that, we just wait till the next time
- * we start to register any changes in lease time. If the administrator
- * really wants to change the lease time *now*, they can go ahead and bring
- * nfsd down and then back up again after changing the lease time.
- *
- * user_lease_time is protected by nfsd_mutex since it's only really accessed
- * when nfsd is starting
- */
-void
-nfs4_reset_lease(time_t leasetime)
-{
- user_lease_time = leasetime;
-}
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 34ccf815ea8a..ac17a7080239 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1234,6 +1234,16 @@ nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
DECODE_TAIL;
}
+static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(rc->rca_one_fs);
+
+ DECODE_TAIL;
+}
+
static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
@@ -1346,7 +1356,7 @@ static nfsd4_dec nfsd41_dec_ops[] = {
[OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
};
struct nfsd4_minorversion_ops {
@@ -1900,7 +1910,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
if ((buflen -= 4) < 0)
goto out_resource;
- WRITE32(NFSD_LEASE_TIME);
+ WRITE32(nfsd4_lease);
}
if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
if ((buflen -= 4) < 0)
@@ -3307,11 +3317,14 @@ nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compo
iov = &rqstp->rq_res.head[0];
iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
BUG_ON(iov->iov_len > PAGE_SIZE);
- if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) {
- nfsd4_store_cache_entry(resp);
- dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
- resp->cstate.slot->sl_inuse = false;
- nfsd4_put_session(resp->cstate.session);
+ if (nfsd4_has_session(cs)) {
+ if (cs->status != nfserr_replay_cache) {
+ nfsd4_store_cache_entry(resp);
+ dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
+ cs->slot->sl_inuse = false;
+ }
+ /* Renew the clientid on success and on replay */
+ release_session_client(cs->session);
}
return 1;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index e3591073098f..bc3194ea01f5 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -46,6 +46,7 @@ enum {
*/
#ifdef CONFIG_NFSD_V4
NFSD_Leasetime,
+ NFSD_Gracetime,
NFSD_RecoveryDir,
#endif
};
@@ -70,6 +71,7 @@ static ssize_t write_ports(struct file *file, char *buf, size_t size);
static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
#ifdef CONFIG_NFSD_V4
static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
+static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
#endif
@@ -91,6 +93,7 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = {
[NFSD_MaxBlkSize] = write_maxblksize,
#ifdef CONFIG_NFSD_V4
[NFSD_Leasetime] = write_leasetime,
+ [NFSD_Gracetime] = write_gracetime,
[NFSD_RecoveryDir] = write_recoverydir,
#endif
};
@@ -1204,29 +1207,45 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
}
#ifdef CONFIG_NFSD_V4
-extern time_t nfs4_leasetime(void);
-
-static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
+static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
{
- /* if size > 10 seconds, call
- * nfs4_reset_lease() then write out the new lease (seconds) as reply
- */
char *mesg = buf;
- int rv, lease;
+ int rv, i;
if (size > 0) {
if (nfsd_serv)
return -EBUSY;
- rv = get_int(&mesg, &lease);
+ rv = get_int(&mesg, &i);
if (rv)
return rv;
- if (lease < 10 || lease > 3600)
+ /*
+ * Some sanity checking. We don't have a reason for
+ * these particular numbers, but problems with the
+ * extremes are:
+ * - Too short: the briefest network outage may
+ * cause clients to lose all their locks. Also,
+ * the frequent polling may be wasteful.
+ * - Too long: do you really want reboot recovery
+ * to take more than an hour? Or to make other
+ * clients wait an hour before being able to
+ * revoke a dead client's locks?
+ */
+ if (i < 10 || i > 3600)
return -EINVAL;
- nfs4_reset_lease(lease);
+ *time = i;
}
- return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n",
- nfs4_lease_time());
+ return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
+}
+
+static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
+{
+ ssize_t rv;
+
+ mutex_lock(&nfsd_mutex);
+ rv = __nfsd4_write_time(file, buf, size, time);
+ mutex_unlock(&nfsd_mutex);
+ return rv;
}
/**
@@ -1252,12 +1271,22 @@ static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
*/
static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
{
- ssize_t rv;
+ return nfsd4_write_time(file, buf, size, &nfsd4_lease);
+}
- mutex_lock(&nfsd_mutex);
- rv = __write_leasetime(file, buf, size);
- mutex_unlock(&nfsd_mutex);
- return rv;
+/**
+ * write_gracetime - Set or report current NFSv4 grace period time
+ *
+ * As above, but sets the time of the NFSv4 grace period.
+ *
+ * Note this should never be set to less than the *previous*
+ * lease-period time, but we don't try to enforce this. (In the common
+ * case (a new boot), we don't know what the previous lease time was
+ * anyway.)
+ */
+static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
+{
+ return nfsd4_write_time(file, buf, size, &nfsd4_grace);
}
extern char *nfs4_recoverydir(void);
@@ -1351,6 +1380,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
#ifdef CONFIG_NFSD_V4
[NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
+ [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
#endif
/* last one */ {""}
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index e942a1aaac92..72377761270e 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -82,7 +82,6 @@ int nfs4_state_init(void);
void nfsd4_free_slabs(void);
int nfs4_state_start(void);
void nfs4_state_shutdown(void);
-time_t nfs4_lease_time(void);
void nfs4_reset_lease(time_t leasetime);
int nfs4_reset_recoverydir(char *recdir);
#else
@@ -90,7 +89,6 @@ static inline int nfs4_state_init(void) { return 0; }
static inline void nfsd4_free_slabs(void) { }
static inline int nfs4_state_start(void) { return 0; }
static inline void nfs4_state_shutdown(void) { }
-static inline time_t nfs4_lease_time(void) { return 0; }
static inline void nfs4_reset_lease(time_t leasetime) { }
static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
#endif
@@ -229,6 +227,9 @@ extern struct timeval nfssvc_boot;
#ifdef CONFIG_NFSD_V4
+extern time_t nfsd4_lease;
+extern time_t nfsd4_grace;
+
/* before processing a COMPOUND operation, we have to check that there
* is enough space in the buffer for XDR encode to succeed. otherwise,
* we might process an operation with side effects, and be unable to
@@ -247,7 +248,6 @@ extern struct timeval nfssvc_boot;
#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
-#define NFSD_LEASE_TIME (nfs4_lease_time())
#define NFSD_LAUNDROMAT_MINTIMEOUT 10 /* seconds */
/*
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 171699eb07c8..06b2a26edfe0 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -120,7 +120,7 @@ u32 nfsd_supported_minorversion;
int nfsd_vers(int vers, enum vers_op change)
{
if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
- return -1;
+ return 0;
switch(change) {
case NFSD_SET:
nfsd_versions[vers] = nfsd_version[vers];
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index fefeae27f25e..006c84230c7c 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -70,6 +70,16 @@ struct nfsd4_cb_sequence {
struct nfs4_client *cbs_clp;
};
+struct nfs4_rpc_args {
+ void *args_op;
+ struct nfsd4_cb_sequence args_seq;
+};
+
+struct nfsd4_callback {
+ struct nfs4_rpc_args cb_args;
+ struct work_struct cb_work;
+};
+
struct nfs4_delegation {
struct list_head dl_perfile;
struct list_head dl_perclnt;
@@ -86,6 +96,7 @@ struct nfs4_delegation {
stateid_t dl_stateid;
struct knfsd_fh dl_fh;
int dl_retries;
+ struct nfsd4_callback dl_recall;
};
/* client delegation callback info */
@@ -96,9 +107,7 @@ struct nfs4_cb_conn {
u32 cb_prog;
u32 cb_minorversion;
u32 cb_ident; /* minorversion 0 only */
- /* RPC client info */
- atomic_t cb_set; /* successful CB_NULL call */
- struct rpc_clnt * cb_client;
+ struct svc_xprt *cb_xprt; /* minorversion 1 only */
};
/* Maximum number of slots per session. 160 is useful for long haul TCP */
@@ -157,7 +166,7 @@ struct nfsd4_session {
struct list_head se_hash; /* hash by sessionid */
struct list_head se_perclnt;
u32 se_flags;
- struct nfs4_client *se_client; /* for expire_client */
+ struct nfs4_client *se_client;
struct nfs4_sessionid se_sessionid;
struct nfsd4_channel_attrs se_fchannel;
struct nfsd4_channel_attrs se_bchannel;
@@ -212,25 +221,41 @@ struct nfs4_client {
struct svc_cred cl_cred; /* setclientid principal */
clientid_t cl_clientid; /* generated by server */
nfs4_verifier cl_confirm; /* generated by server */
- struct nfs4_cb_conn cl_cb_conn; /* callback info */
- atomic_t cl_count; /* ref count */
u32 cl_firststate; /* recovery dir creation */
+ /* for v4.0 and v4.1 callbacks: */
+ struct nfs4_cb_conn cl_cb_conn;
+ struct rpc_clnt *cl_cb_client;
+ atomic_t cl_cb_set;
+
/* for nfs41 */
struct list_head cl_sessions;
struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
u32 cl_exchange_flags;
struct nfs4_sessionid cl_sessionid;
+ /* number of rpc's in progress over an associated session: */
+ atomic_t cl_refcount;
/* for nfs41 callbacks */
/* We currently support a single back channel with a single slot */
unsigned long cl_cb_slot_busy;
u32 cl_cb_seq_nr;
- struct svc_xprt *cl_cb_xprt; /* 4.1 callback transport */
struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
/* wait here for slots */
};
+static inline void
+mark_client_expired(struct nfs4_client *clp)
+{
+ clp->cl_time = 0;
+}
+
+static inline bool
+is_client_expired(struct nfs4_client *clp)
+{
+ return clp->cl_time == 0;
+}
+
/* struct nfs4_client_reset
* one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
* upon lease reset, or from upcall to state_daemon (to read in state
@@ -377,11 +402,14 @@ extern void nfs4_lock_state(void);
extern void nfs4_unlock_state(void);
extern int nfs4_in_grace(void);
extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
-extern void put_nfs4_client(struct nfs4_client *clp);
extern void nfs4_free_stateowner(struct kref *kref);
extern int set_callback_cred(void);
-extern void nfsd4_probe_callback(struct nfs4_client *clp);
+extern void nfsd4_probe_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
+extern void nfsd4_do_callback_rpc(struct work_struct *);
extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
+extern int nfsd4_create_callback_queue(void);
+extern void nfsd4_destroy_callback_queue(void);
+extern void nfsd4_set_callback_client(struct nfs4_client *, struct rpc_clnt *);
extern void nfs4_put_delegation(struct nfs4_delegation *dp);
extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
extern void nfsd4_init_recdir(char *recdir_name);
@@ -392,6 +420,7 @@ extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
extern void nfsd4_recdir_purge_old(void);
extern int nfsd4_create_clid_dir(struct nfs4_client *clp);
extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
+extern void release_session_client(struct nfsd4_session *);
static inline void
nfs4_put_stateowner(struct nfs4_stateowner *so)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 6dd5f1970e01..23c06f77f4ca 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -724,7 +724,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
struct inode *inode;
int flags = O_RDONLY|O_LARGEFILE;
__be32 err;
- int host_err;
+ int host_err = 0;
validate_process_creds();
@@ -761,7 +761,8 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
* Check to see if there are any leases on this file.
* This may block while leases are broken.
*/
- host_err = break_lease(inode, O_NONBLOCK | ((access & NFSD_MAY_WRITE) ? O_WRONLY : 0));
+ if (!(access & NFSD_MAY_NOT_BREAK_LEASE))
+ host_err = break_lease(inode, O_NONBLOCK | ((access & NFSD_MAY_WRITE) ? O_WRONLY : 0));
if (host_err == -EWOULDBLOCK)
host_err = -ETIMEDOUT;
if (host_err) /* NOMEM or WOULDBLOCK */
@@ -1169,7 +1170,8 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp,
goto out;
}
- err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_WRITE, &file);
+ err = nfsd_open(rqstp, fhp, S_IFREG,
+ NFSD_MAY_WRITE|NFSD_MAY_NOT_BREAK_LEASE, &file);
if (err)
goto out;
if (EX_ISSYNC(fhp->fh_export)) {
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index 4b1de0a9ea75..217a62c2a357 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -20,6 +20,7 @@
#define NFSD_MAY_OWNER_OVERRIDE 64
#define NFSD_MAY_LOCAL_ACCESS 128 /* IRIX doing local access check on device special file*/
#define NFSD_MAY_BYPASS_GSS_ON_ROOT 256
+#define NFSD_MAY_NOT_BREAK_LEASE 512
#define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
#define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index efa337739534..4d476ff08ae6 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -381,6 +381,10 @@ struct nfsd4_destroy_session {
struct nfs4_sessionid sessionid;
};
+struct nfsd4_reclaim_complete {
+ u32 rca_one_fs;
+};
+
struct nfsd4_op {
int opnum;
__be32 status;
@@ -421,6 +425,7 @@ struct nfsd4_op {
struct nfsd4_create_session create_session;
struct nfsd4_destroy_session destroy_session;
struct nfsd4_sequence sequence;
+ struct nfsd4_reclaim_complete reclaim_complete;
} u;
struct nfs4_replay * replay;
};
@@ -513,9 +518,8 @@ extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp);
extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
struct nfsd4_sequence *seq);
extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
- struct nfsd4_compound_state *,
-struct nfsd4_exchange_id *);
- extern __be32 nfsd4_create_session(struct svc_rqst *,
+ struct nfsd4_compound_state *, struct nfsd4_exchange_id *);
+extern __be32 nfsd4_create_session(struct svc_rqst *,
struct nfsd4_compound_state *,
struct nfsd4_create_session *);
extern __be32 nfsd4_sequence(struct svc_rqst *,
@@ -524,6 +528,7 @@ extern __be32 nfsd4_sequence(struct svc_rqst *,
extern __be32 nfsd4_destroy_session(struct svc_rqst *,
struct nfsd4_compound_state *,
struct nfsd4_destroy_session *);
+__be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_reclaim_complete *);
extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
struct nfsd4_open *open);
extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 04:13:38 +0000