#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;
static u32 current_delegid = 1;
-static u32 nfs4_init;
static stateid_t zerostateid; /* bits all 0 */
static stateid_t onestateid; /* bits all 1 */
static u64 current_sessionid = 1;
static struct list_head file_hashtbl[FILE_HASH_SIZE];
static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
+static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag)
+{
+ BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
+ atomic_inc(&fp->fi_access[oflag]);
+}
+
+static void nfs4_file_get_access(struct nfs4_file *fp, int oflag)
+{
+ if (oflag == O_RDWR) {
+ __nfs4_file_get_access(fp, O_RDONLY);
+ __nfs4_file_get_access(fp, O_WRONLY);
+ } else
+ __nfs4_file_get_access(fp, oflag);
+}
+
+static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag)
+{
+ if (fp->fi_fds[oflag]) {
+ fput(fp->fi_fds[oflag]);
+ fp->fi_fds[oflag] = NULL;
+ }
+}
+
+static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
+{
+ if (atomic_dec_and_test(&fp->fi_access[oflag])) {
+ nfs4_file_put_fd(fp, O_RDWR);
+ nfs4_file_put_fd(fp, oflag);
+ }
+}
+
+static void nfs4_file_put_access(struct nfs4_file *fp, int oflag)
+{
+ if (oflag == O_RDWR) {
+ __nfs4_file_put_access(fp, O_RDONLY);
+ __nfs4_file_put_access(fp, O_WRONLY);
+ } else
+ __nfs4_file_put_access(fp, oflag);
+}
+
static struct nfs4_delegation *
alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
{
struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn;
dprintk("NFSD alloc_init_deleg\n");
+ /*
+ * Major work on the lease subsystem (for example, to support
+ * calbacks on stat) will be required before we can support
+ * write delegations properly.
+ */
+ if (type != NFS4_OPEN_DELEGATE_READ)
+ return NULL;
if (fp->fi_had_conflict)
return NULL;
if (num_delegations > max_delegations)
dp->dl_client = clp;
get_nfs4_file(fp);
dp->dl_file = fp;
+ nfs4_file_get_access(fp, O_RDONLY);
dp->dl_flock = NULL;
- get_file(stp->st_vfs_file);
- 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;
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;
}
static void
nfs4_close_delegation(struct nfs4_delegation *dp)
{
- struct file *filp = dp->dl_vfs_file;
+ struct file *filp = find_readable_file(dp->dl_file);
dprintk("NFSD: close_delegation dp %p\n",dp);
- dp->dl_vfs_file = NULL;
- /* The following nfsd_close may not actually close the file,
- * but we want to remove the lease in any case. */
if (dp->dl_flock)
vfs_setlease(filp, F_UNLCK, &dp->dl_flock);
- nfsd_close(filp);
+ nfs4_file_put_access(dp->dl_file, O_RDONLY);
}
/* Called under the state lock. */
* 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)
static void release_lock_stateid(struct nfs4_stateid *stp)
{
+ struct file *file;
+
unhash_generic_stateid(stp);
- locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner);
+ file = find_any_file(stp->st_file);
+ if (file)
+ locks_remove_posix(file, (fl_owner_t)stp->st_stateowner);
free_generic_stateid(stp);
}
}
}
+/*
+ * We store the NONE, READ, WRITE, and BOTH bits separately in the
+ * st_{access,deny}_bmap field of the stateid, in order to track not
+ * only what share bits are currently in force, but also what
+ * combinations of share bits previous opens have used. This allows us
+ * to enforce the recommendation of rfc 3530 14.2.19 that the server
+ * return an error if the client attempt to downgrade to a combination
+ * of share bits not explicable by closing some of its previous opens.
+ *
+ * XXX: This enforcement is actually incomplete, since we don't keep
+ * track of access/deny bit combinations; so, e.g., we allow:
+ *
+ * OPEN allow read, deny write
+ * OPEN allow both, deny none
+ * DOWNGRADE allow read, deny none
+ *
+ * which we should reject.
+ */
+static void
+set_access(unsigned int *access, unsigned long bmap) {
+ int i;
+
+ *access = 0;
+ for (i = 1; i < 4; i++) {
+ if (test_bit(i, &bmap))
+ *access |= i;
+ }
+}
+
+static void
+set_deny(unsigned int *deny, unsigned long bmap) {
+ int i;
+
+ *deny = 0;
+ for (i = 0; i < 4; i++) {
+ if (test_bit(i, &bmap))
+ *deny |= i ;
+ }
+}
+
+static int
+test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
+ unsigned int access, deny;
+
+ set_access(&access, stp->st_access_bmap);
+ set_deny(&deny, stp->st_deny_bmap);
+ if ((access & open->op_share_deny) || (deny & open->op_share_access))
+ return 0;
+ return 1;
+}
+
+static int nfs4_access_to_omode(u32 access)
+{
+ switch (access) {
+ case NFS4_SHARE_ACCESS_READ:
+ return O_RDONLY;
+ case NFS4_SHARE_ACCESS_WRITE:
+ return O_WRONLY;
+ case NFS4_SHARE_ACCESS_BOTH:
+ return O_RDWR;
+ }
+ BUG();
+}
+
+static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp)
+{
+ unsigned int access;
+
+ set_access(&access, stp->st_access_bmap);
+ return nfs4_access_to_omode(access);
+}
+
static void release_open_stateid(struct nfs4_stateid *stp)
{
+ int oflag = nfs4_access_bmap_to_omode(stp);
+
unhash_generic_stateid(stp);
release_stateid_lockowners(stp);
- nfsd_close(stp->st_vfs_file);
+ nfs4_file_put_access(stp->st_file, oflag);
free_generic_stateid(stp);
}
nfs4_put_stateowner(sop);
}
-static DEFINE_SPINLOCK(sessionid_lock);
#define SESSION_HASH_SIZE 512
static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE];
spin_unlock(&nfsd_drc_lock);
if (fchan->maxreqs == 0)
- return nfserr_serverfault;
+ return nfserr_jukebox;
fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ;
return 0;
BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot)
+ sizeof(struct nfsd4_session) > PAGE_SIZE);
- status = nfserr_serverfault;
+ status = nfserr_jukebox;
/* allocate struct nfsd4_session and slot table pointers in one piece */
slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *);
new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL);
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:
goto out;
}
-/* caller must hold sessionid_lock */
+/* caller must hold client_lock */
static struct nfsd4_session *
find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid)
{
dump_sessionid(__func__, sessionid);
idx = hash_sessionid(sessionid);
- dprintk("%s: idx is %d\n", __func__, idx);
/* Search in the appropriate list */
list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) {
- dump_sessionid("list traversal", &elem->se_sessionid);
if (!memcmp(elem->se_sessionid.data, sessionid->data,
NFS4_MAX_SESSIONID_LEN)) {
return elem;
return NULL;
}
-/* caller must hold sessionid_lock */
+/* caller must hold client_lock */
static void
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)
{
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.
*/
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)
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);
}
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);
+}
+
+/* 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
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)) {
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)
}
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);
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
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);
}
/* Normal case */
new = create_client(exid->clname, dname, rqstp, &verf);
if (new == NULL) {
- status = nfserr_serverfault;
+ status = nfserr_jukebox;
goto out;
}
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);
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 {
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;
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,
* - 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:
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)
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)
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;
}
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)))
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;
+ memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
+ memset(fp->fi_access, 0, sizeof(fp->fi_access));
+ spin_lock(&recall_lock);
+ list_add(&fp->fi_hash, &file_hashtbl[hashval]);
+ spin_unlock(&recall_lock);
return fp;
}
return NULL;
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;
return x <= NFS4_SHARE_DENY_BOTH;
}
-/*
- * We store the NONE, READ, WRITE, and BOTH bits separately in the
- * st_{access,deny}_bmap field of the stateid, in order to track not
- * only what share bits are currently in force, but also what
- * combinations of share bits previous opens have used. This allows us
- * to enforce the recommendation of rfc 3530 14.2.19 that the server
- * return an error if the client attempt to downgrade to a combination
- * of share bits not explicable by closing some of its previous opens.
- *
- * XXX: This enforcement is actually incomplete, since we don't keep
- * track of access/deny bit combinations; so, e.g., we allow:
- *
- * OPEN allow read, deny write
- * OPEN allow both, deny none
- * DOWNGRADE allow read, deny none
- *
- * which we should reject.
- */
-static void
-set_access(unsigned int *access, unsigned long bmap) {
- int i;
-
- *access = 0;
- for (i = 1; i < 4; i++) {
- if (test_bit(i, &bmap))
- *access |= i;
- }
-}
-
-static void
-set_deny(unsigned int *deny, unsigned long bmap) {
- int i;
-
- *deny = 0;
- for (i = 0; i < 4; i++) {
- if (test_bit(i, &bmap))
- *deny |= i ;
- }
-}
-
-static int
-test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
- unsigned int access, deny;
-
- set_access(&access, stp->st_access_bmap);
- set_deny(&deny, stp->st_deny_bmap);
- if ((access & open->op_share_deny) || (deny & open->op_share_access))
- return 0;
- return 1;
-}
-
/*
* Called to check deny when READ with all zero stateid or
* WRITE with all zero or all one stateid
}
static inline void
-nfs4_file_downgrade(struct file *filp, unsigned int share_access)
+nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access)
{
- if (share_access & NFS4_SHARE_ACCESS_WRITE) {
- drop_file_write_access(filp);
- spin_lock(&filp->f_lock);
- filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
- spin_unlock(&filp->f_lock);
- }
+ if (share_access & NFS4_SHARE_ACCESS_WRITE)
+ nfs4_file_put_access(fp, O_WRONLY);
+ if (share_access & NFS4_SHARE_ACCESS_READ)
+ nfs4_file_put_access(fp, O_RDONLY);
}
/*
* 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);
return NULL;
}
+int share_access_to_flags(u32 share_access)
+{
+ share_access &= ~NFS4_SHARE_WANT_MASK;
+
+ return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
+}
+
static __be32
nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
struct nfs4_delegation **dp)
*dp = find_delegation_file(fp, &open->op_delegate_stateid);
if (*dp == NULL)
goto out;
- flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
- RD_STATE : WR_STATE;
+ flags = share_access_to_flags(open->op_share_access);
status = nfs4_check_delegmode(*dp, flags);
if (status)
*dp = NULL;
return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
}
+static inline int nfs4_access_to_access(u32 nfs4_access)
+{
+ int flags = 0;
+
+ if (nfs4_access & NFS4_SHARE_ACCESS_READ)
+ flags |= NFSD_MAY_READ;
+ if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
+ flags |= NFSD_MAY_WRITE;
+ return flags;
+}
+
+static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file
+*fp, struct svc_fh *cur_fh, u32 nfs4_access)
+{
+ __be32 status;
+ int oflag = nfs4_access_to_omode(nfs4_access);
+ int access = nfs4_access_to_access(nfs4_access);
+
+ if (!fp->fi_fds[oflag]) {
+ status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
+ &fp->fi_fds[oflag]);
+ if (status == nfserr_dropit)
+ status = nfserr_jukebox;
+ if (status)
+ return status;
+ }
+ nfs4_file_get_access(fp, oflag);
+
+ return nfs_ok;
+}
+
static __be32
nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
- struct nfs4_delegation *dp,
- struct svc_fh *cur_fh, int flags)
+ struct nfs4_file *fp, struct svc_fh *cur_fh,
+ struct nfsd4_open *open)
{
struct nfs4_stateid *stp;
+ __be32 status;
stp = nfs4_alloc_stateid();
if (stp == NULL)
return nfserr_resource;
- if (dp) {
- get_file(dp->dl_vfs_file);
- stp->st_vfs_file = dp->dl_vfs_file;
- } else {
- __be32 status;
- status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
- &stp->st_vfs_file);
- if (status) {
- if (status == nfserr_dropit)
- status = nfserr_jukebox;
- kmem_cache_free(stateid_slab, stp);
- return status;
- }
+ status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access);
+ if (status) {
+ kmem_cache_free(stateid_slab, stp);
+ return status;
}
*stpp = stp;
return 0;
}
static __be32
-nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
+nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
{
- struct file *filp = stp->st_vfs_file;
- struct inode *inode = filp->f_path.dentry->d_inode;
- unsigned int share_access, new_writer;
+ u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK;
+ bool new_access;
__be32 status;
- set_access(&share_access, stp->st_access_bmap);
- new_writer = (~share_access) & open->op_share_access
- & NFS4_SHARE_ACCESS_WRITE;
-
- if (new_writer) {
- int err = get_write_access(inode);
- if (err)
- return nfserrno(err);
- err = mnt_want_write(cur_fh->fh_export->ex_path.mnt);
- if (err)
- return nfserrno(err);
- file_take_write(filp);
+ new_access = !test_bit(op_share_access, &stp->st_access_bmap);
+ if (new_access) {
+ status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access);
+ if (status)
+ return status;
}
status = nfsd4_truncate(rqstp, cur_fh, open);
if (status) {
- if (new_writer)
- put_write_access(inode);
+ if (new_access) {
+ int oflag = nfs4_access_to_omode(new_access);
+ nfs4_file_put_access(fp, oflag);
+ }
return status;
}
/* remember the open */
- filp->f_mode |= open->op_share_access;
- __set_bit(open->op_share_access, &stp->st_access_bmap);
+ __set_bit(op_share_access, &stp->st_access_bmap);
__set_bit(open->op_share_deny, &stp->st_deny_bmap);
return nfs_ok;
{
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;
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)
* 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;
fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
fl.fl_end = OFFSET_MAX;
fl.fl_owner = (fl_owner_t)dp;
- fl.fl_file = stp->st_vfs_file;
+ fl.fl_file = find_readable_file(stp->st_file);
+ BUG_ON(!fl.fl_file);
fl.fl_pid = current->tgid;
/* vfs_setlease checks to see if delegation should be handed out.
* the lock_manager callbacks fl_mylease and fl_change are used
*/
- if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) {
+ if ((status = vfs_setlease(fl.fl_file, fl.fl_type, &flp))) {
dprintk("NFSD: setlease failed [%d], no delegation\n", status);
unhash_delegation(dp);
flag = NFS4_OPEN_DELEGATE_NONE;
*/
if (stp) {
/* Stateid was found, this is an OPEN upgrade */
- status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
+ status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
if (status)
goto out;
update_stateid(&stp->st_stateid);
} else {
- /* Stateid was not found, this is a new OPEN */
- int flags = 0;
- if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
- flags |= NFSD_MAY_READ;
- if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
- flags |= NFSD_MAY_WRITE;
- status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
+ status = nfs4_new_open(rqstp, &stp, fp, current_fh, open);
if (status)
goto out;
init_stateid(stp, fp, open);
}
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
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:
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
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)) {
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);
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)) {
static inline int
nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
{
- return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode;
+ return fhp->fh_dentry->d_inode != stp->st_file->fi_inode;
}
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
{
__be32 status = nfserr_openmode;
+ /* For lock stateid's, we test the parent open, not the lock: */
+ if (stp->st_openstp)
+ stp = stp->st_openstp;
if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
goto out;
if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
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)
goto out;
renew_client(dp->dl_client);
if (filpp)
- *filpp = dp->dl_vfs_file;
+ *filpp = find_readable_file(dp->dl_file);
+ BUG_ON(!*filpp);
} 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)
if (status)
goto out;
renew_client(stp->st_stateowner->so_client);
- if (filpp)
- *filpp = stp->st_vfs_file;
+ if (filpp) {
+ if (flags & RD_STATE)
+ *filpp = find_readable_file(stp->st_file);
+ else
+ *filpp = find_writeable_file(stp->st_file);
+ }
}
status = nfs_ok;
out:
*/
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;
}
goto out;
}
set_access(&share_access, stp->st_access_bmap);
- nfs4_file_downgrade(stp->st_vfs_file,
- share_access & ~od->od_share_access);
+ nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access);
reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
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;
nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
{
struct nfs4_stateowner *sop;
- unsigned int hval;
if (fl->fl_lmops == &nfsd_posix_mng_ops) {
sop = (struct nfs4_stateowner *) fl->fl_owner;
- hval = lockownerid_hashval(sop->so_id);
kref_get(&sop->so_ref);
deny->ld_sop = sop;
deny->ld_clientid = sop->so_client->cl_clientid;
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;
- stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
- stp->st_access_bmap = open_stp->st_access_bmap;
stp->st_deny_bmap = open_stp->st_deny_bmap;
stp->st_openstp = open_stp;
struct nfs4_stateowner *open_sop = NULL;
struct nfs4_stateowner *lock_sop = NULL;
struct nfs4_stateid *lock_stp;
- struct file *filp;
+ struct nfs4_file *fp;
+ struct file *filp = NULL;
struct file_lock file_lock;
struct file_lock conflock;
__be32 status = 0;
* lock stateid.
*/
struct nfs4_stateid *open_stp = NULL;
- struct nfs4_file *fp;
status = nfserr_stale_clientid;
if (!nfsd4_has_session(cstate) &&
if (status)
goto out;
lock_sop = lock->lk_replay_owner;
+ fp = lock_stp->st_file;
}
/* lock->lk_replay_owner and lock_stp have been created or found */
- filp = lock_stp->st_vfs_file;
status = nfserr_grace;
if (locks_in_grace() && !lock->lk_reclaim)
switch (lock->lk_type) {
case NFS4_READ_LT:
case NFS4_READW_LT:
+ if (find_readable_file(lock_stp->st_file)) {
+ nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ);
+ filp = find_readable_file(lock_stp->st_file);
+ }
file_lock.fl_type = F_RDLCK;
cmd = F_SETLK;
break;
case NFS4_WRITE_LT:
case NFS4_WRITEW_LT:
+ if (find_writeable_file(lock_stp->st_file)) {
+ nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE);
+ filp = find_writeable_file(lock_stp->st_file);
+ }
file_lock.fl_type = F_WRLCK;
cmd = F_SETLK;
break;
status = nfserr_inval;
goto out;
}
+ if (!filp) {
+ status = nfserr_openmode;
+ goto out;
+ }
file_lock.fl_owner = (fl_owner_t)lock_sop;
file_lock.fl_pid = current->tgid;
file_lock.fl_file = filp;
&locku->lu_stateowner, &stp, NULL)))
goto out;
- filp = stp->st_vfs_file;
+ filp = find_any_file(stp->st_file);
+ if (!filp) {
+ status = nfserr_lock_range;
+ goto out;
+ }
BUG_ON(!filp);
locks_init_lock(&file_lock);
file_lock.fl_type = F_UNLCK;
* 0: no locks held by lockowner
*/
static int
-check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
+check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner)
{
struct file_lock **flpp;
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = filp->fi_inode;
int status = 0;
lock_kernel();
continue;
list_for_each_entry(stp, &sop->so_stateids,
st_perstateowner) {
- if (check_for_locks(stp->st_vfs_file, sop))
+ if (check_for_locks(stp->st_file, sop))
goto out;
/* Note: so_perclient unused for lockowners,
* so it's OK to fool with here. */
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
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
nfs4_state_start(void)
{
- int ret;
-
- if (nfs4_init)
- return 0;
nfsd4_load_reboot_recovery_data();
- ret = __nfs4_state_start();
- if (ret)
- return ret;
- nfs4_init = 1;
- return 0;
-}
-
-time_t
-nfs4_lease_time(void)
-{
- return lease_time;
+ return __nfs4_state_start();
}
static void
}
nfsd4_shutdown_recdir();
- nfs4_init = 0;
}
void
nfs4_lock_state();
nfs4_release_reclaim();
__nfs4_state_shutdown();
+ nfsd4_destroy_callback_queue();
nfs4_unlock_state();
}
{
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;
-}
projects / mv-sheeva.git / blobdiff