#include <linux/mount.h>
#include <linux/workqueue.h>
#include <linux/smp_lock.h>
+#include <linux/kthread.h>
#include <linux/nfs4.h>
#include <linux/nfsd/state.h>
#include <linux/nfsd/xdr4.h>
time_t boot_time;
static time_t grace_end = 0;
static u32 current_clientid = 1;
-static u32 current_ownerid;
-static u32 current_fileid;
+static u32 current_ownerid = 1;
+static u32 current_fileid = 1;
+static u32 current_delegid = 1;
static u32 nfs4_init;
stateid_t zerostateid; /* bits all 0 */
stateid_t onestateid; /* bits all 1 */
u32 del_perclient = 0;
u32 alloc_file = 0;
u32 free_file = 0;
-u32 alloc_sowner = 0;
-u32 free_sowner = 0;
u32 vfsopen = 0;
u32 vfsclose = 0;
-u32 alloc_lsowner= 0;
+u32 alloc_delegation= 0;
+u32 free_delegation= 0;
/* forward declarations */
struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
+static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
+static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
/* Locking:
*
static void release_stateid(struct nfs4_stateid *stp, int flags);
static void release_file(struct nfs4_file *fp);
+/*
+ * Delegation state
+ */
+
+/* recall_lock protects the del_recall_lru */
+spinlock_t recall_lock;
+static struct list_head del_recall_lru;
+
+static struct nfs4_delegation *
+alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
+{
+ struct nfs4_delegation *dp;
+ struct nfs4_file *fp = stp->st_file;
+ struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
+
+ dprintk("NFSD alloc_init_deleg\n");
+ if ((dp = kmalloc(sizeof(struct nfs4_delegation),
+ GFP_KERNEL)) == NULL)
+ return dp;
+ INIT_LIST_HEAD(&dp->dl_del_perfile);
+ INIT_LIST_HEAD(&dp->dl_del_perclnt);
+ INIT_LIST_HEAD(&dp->dl_recall_lru);
+ dp->dl_client = clp;
+ dp->dl_file = fp;
+ dp->dl_flock = NULL;
+ get_file(stp->st_vfs_file);
+ dp->dl_vfs_file = stp->st_vfs_file;
+ dp->dl_type = type;
+ dp->dl_recall.cbr_dp = NULL;
+ dp->dl_recall.cbr_ident = cb->cb_ident;
+ dp->dl_recall.cbr_trunc = 0;
+ 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;
+ dp->dl_fhlen = current_fh->fh_handle.fh_size;
+ memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
+ current_fh->fh_handle.fh_size);
+ dp->dl_time = 0;
+ atomic_set(&dp->dl_count, 1);
+ list_add(&dp->dl_del_perfile, &fp->fi_del_perfile);
+ list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt);
+ alloc_delegation++;
+ return dp;
+}
+
+void
+nfs4_put_delegation(struct nfs4_delegation *dp)
+{
+ if (atomic_dec_and_test(&dp->dl_count)) {
+ dprintk("NFSD: freeing dp %p\n",dp);
+ kfree(dp);
+ free_delegation++;
+ }
+}
+
+/* Remove the associated file_lock first, then remove the delegation.
+ * lease_modify() is called to remove the FS_LEASE file_lock from
+ * the i_flock list, eventually calling nfsd's lock_manager
+ * fl_release_callback.
+ */
+static void
+nfs4_close_delegation(struct nfs4_delegation *dp)
+{
+ struct file *filp = dp->dl_vfs_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)
+ setlease(filp, F_UNLCK, &dp->dl_flock);
+ nfsd_close(filp);
+ vfsclose++;
+}
+
+/* Called under the state lock. */
+static void
+unhash_delegation(struct nfs4_delegation *dp)
+{
+ list_del_init(&dp->dl_del_perfile);
+ list_del_init(&dp->dl_del_perclnt);
+ spin_lock(&recall_lock);
+ list_del_init(&dp->dl_recall_lru);
+ spin_unlock(&recall_lock);
+ nfs4_close_delegation(dp);
+ nfs4_put_delegation(dp);
+}
/*
* SETCLIENTID state
* for last close replay.
*/
static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
-static int reclaim_str_hashtbl_size;
+static int reclaim_str_hashtbl_size = 0;
static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
kfree(clp);
}
+void
+put_nfs4_client(struct nfs4_client *clp)
+{
+ if (atomic_dec_and_test(&clp->cl_count))
+ free_client(clp);
+}
+
static void
expire_client(struct nfs4_client *clp)
{
struct nfs4_stateowner *sop;
+ struct nfs4_delegation *dp;
+ struct nfs4_callback *cb = &clp->cl_callback;
+ struct rpc_clnt *clnt = clp->cl_callback.cb_client;
+ struct list_head reaplist;
- dprintk("NFSD: expire_client\n");
+ dprintk("NFSD: expire_client cl_count %d\n",
+ atomic_read(&clp->cl_count));
+
+ /* shutdown rpc client, ending any outstanding recall rpcs */
+ if (atomic_read(&cb->cb_set) == 1 && clnt) {
+ rpc_shutdown_client(clnt);
+ clnt = clp->cl_callback.cb_client = NULL;
+ }
+
+ INIT_LIST_HEAD(&reaplist);
+ spin_lock(&recall_lock);
+ while (!list_empty(&clp->cl_del_perclnt)) {
+ dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt);
+ dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
+ dp->dl_flock);
+ list_del_init(&dp->dl_del_perclnt);
+ list_move(&dp->dl_recall_lru, &reaplist);
+ }
+ spin_unlock(&recall_lock);
+ while (!list_empty(&reaplist)) {
+ dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
+ 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);
sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient);
release_stateowner(sop);
}
- free_client(clp);
+ put_nfs4_client(clp);
}
static struct nfs4_client *
if (!(clp = alloc_client(name)))
goto out;
+ atomic_set(&clp->cl_count, 1);
+ atomic_set(&clp->cl_callback.cb_set, 0);
+ clp->cl_callback.cb_parsed = 0;
INIT_LIST_HEAD(&clp->cl_idhash);
INIT_LIST_HEAD(&clp->cl_strhash);
INIT_LIST_HEAD(&clp->cl_perclient);
+ INIT_LIST_HEAD(&clp->cl_del_perclnt);
INIT_LIST_HEAD(&clp->cl_lru);
out:
return clp;
}
void
-move_to_confirmed(struct nfs4_client *clp, unsigned int idhashval)
+move_to_confirmed(struct nfs4_client *clp)
{
+ unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
unsigned int strhashval;
dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
renew_client(clp);
}
+static struct nfs4_client *
+find_confirmed_client(clientid_t *clid)
+{
+ struct nfs4_client *clp;
+ unsigned int idhashval = clientid_hashval(clid->cl_id);
+
+ list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
+ if (cmp_clid(&clp->cl_clientid, clid))
+ return clp;
+ }
+ return NULL;
+}
+
+static struct nfs4_client *
+find_unconfirmed_client(clientid_t *clid)
+{
+ struct nfs4_client *clp;
+ unsigned int idhashval = clientid_hashval(clid->cl_id);
+
+ list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
+ if (cmp_clid(&clp->cl_clientid, clid))
+ return clp;
+ }
+ return NULL;
+}
/* a helper function for parse_callback */
static int
{
struct nfs4_callback *cb = &clp->cl_callback;
+ /* Currently, we only support tcp for the callback channel */
+ if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
+ goto out_err;
+
if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
- &cb->cb_addr, &cb->cb_port))) {
- printk(KERN_INFO "NFSD: BAD callback address. client will not receive delegations\n");
- cb->cb_parsed = 0;
- return;
- }
- cb->cb_netid.len = se->se_callback_netid_len;
- cb->cb_netid.data = se->se_callback_netid_val;
+ &cb->cb_addr, &cb->cb_port)))
+ goto out_err;
cb->cb_prog = se->se_callback_prog;
cb->cb_ident = se->se_callback_ident;
cb->cb_parsed = 1;
+ return;
+out_err:
+ printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
+ "will not receive delegations\n",
+ clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
+
+ cb->cb_parsed = 0;
+ return;
}
/*
nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
{
u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
- unsigned int idhashval;
struct nfs4_client *clp, *conf = NULL, *unconf = NULL;
nfs4_verifier confirm = setclientid_confirm->sc_confirm;
clientid_t * clid = &setclientid_confirm->sc_clientid;
int status;
- status = nfserr_stale_clientid;
if (STALE_CLIENTID(clid))
- goto out;
+ return nfserr_stale_clientid;
/*
* XXX The Duplicate Request Cache (DRC) has been checked (??)
* We get here on a DRC miss.
*/
- idhashval = clientid_hashval(clid->cl_id);
nfs4_lock_state();
- list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
- if (!cmp_clid(&clp->cl_clientid, clid))
- continue;
-
+ clp = find_confirmed_client(clid);
+ if (clp) {
status = nfserr_inval;
/*
* Found a record for this clientid. If the IP addresses
goto out;
}
conf = clp;
- break;
}
- list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
- if (!cmp_clid(&clp->cl_clientid, clid))
- continue;
+ clp = find_unconfirmed_client(clid);
+ if (clp) {
status = nfserr_inval;
if (clp->cl_addr != ip_addr) {
printk("NFSD: setclientid: string in use by client"
goto out;
}
unconf = clp;
- break;
}
/* CASE 1:
* unconf record that matches input clientid and input confirm.
status = nfserr_clid_inuse;
else {
expire_client(conf);
- move_to_confirmed(unconf, idhashval);
+ clp = unconf;
+ move_to_confirmed(unconf);
status = nfs_ok;
}
goto out;
if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) {
status = nfserr_clid_inuse;
} else {
+ clp = conf;
status = nfs_ok;
}
goto out;
status = nfserr_clid_inuse;
} else {
status = nfs_ok;
- move_to_confirmed(unconf, idhashval);
+ clp = unconf;
+ move_to_confirmed(unconf);
}
goto out;
}
status = nfserr_inval;
goto out;
out:
- /* XXX if status == nfs_ok, probe callback path */
+ if (!status)
+ nfsd4_probe_callback(clp);
nfs4_unlock_state();
return status;
}
/* OPEN Share state helper functions */
static inline struct nfs4_file *
-alloc_init_file(unsigned int hashval, struct inode *ino) {
+alloc_init_file(struct inode *ino)
+{
struct nfs4_file *fp;
+ unsigned int hashval = file_hashval(ino);
+
if ((fp = kmalloc(sizeof(struct nfs4_file),GFP_KERNEL))) {
INIT_LIST_HEAD(&fp->fi_hash);
INIT_LIST_HEAD(&fp->fi_perfile);
+ INIT_LIST_HEAD(&fp->fi_del_perfile);
list_add(&fp->fi_hash, &file_hashtbl[hashval]);
fp->fi_inode = igrab(ino);
fp->fi_id = current_fileid++;
while (!list_empty(&file_hashtbl[i])) {
fp = list_entry(file_hashtbl[i].next, struct nfs4_file, fi_hash);
/* this should never be more than once... */
- if (!list_empty(&fp->fi_perfile)) {
+ if (!list_empty(&fp->fi_perfile) || !list_empty(&fp->fi_del_perfile)) {
printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp);
}
release_file(fp);
}
}
-/* should use a slab cache */
+kmem_cache_t *stateowner_slab = NULL;
+
+static int
+nfsd4_init_slabs(void)
+{
+ stateowner_slab = kmem_cache_create("nfsd4_stateowners",
+ sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
+ if (stateowner_slab == NULL) {
+ dprintk("nfsd4: out of memory while initializing nfsv4\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static void
+nfsd4_free_slabs(void)
+{
+ int status = 0;
+
+ if (stateowner_slab)
+ status = kmem_cache_destroy(stateowner_slab);
+ stateowner_slab = NULL;
+ BUG_ON(status);
+}
+
void
nfs4_free_stateowner(struct kref *kref)
{
struct nfs4_stateowner *sop =
container_of(kref, struct nfs4_stateowner, so_ref);
kfree(sop->so_owner.data);
- kfree(sop);
- free_sowner++;
+ kmem_cache_free(stateowner_slab, sop);
}
static inline struct nfs4_stateowner *
{
struct nfs4_stateowner *sop;
- if ((sop = kmalloc(sizeof(struct nfs4_stateowner),GFP_KERNEL))) {
+ if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
memcpy(sop->so_owner.data, owner->data, owner->len);
sop->so_owner.len = owner->len;
kref_init(&sop->so_ref);
return sop;
}
- kfree(sop);
+ kmem_cache_free(stateowner_slab, sop);
}
return NULL;
}
rp->rp_status = NFSERR_SERVERFAULT;
rp->rp_buflen = 0;
rp->rp_buf = rp->rp_ibuf;
- alloc_sowner++;
return sop;
}
static void
-release_stateid_lockowner(struct nfs4_stateid *open_stp)
+release_stateid_lockowners(struct nfs4_stateid *open_stp)
{
struct nfs4_stateowner *lock_sop;
list_del(&sop->so_idhash);
list_del(&sop->so_strhash);
- list_del(&sop->so_perclient);
+ if (sop->so_is_open_owner) {
+ list_del(&sop->so_perclient);
+ del_perclient++;
+ }
list_del(&sop->so_perlockowner);
- del_perclient++;
while (!list_empty(&sop->so_perfilestate)) {
stp = list_entry(sop->so_perfilestate.next,
struct nfs4_stateid, st_perfilestate);
}
static inline void
-init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfs4_stateowner *sop, struct nfsd4_open *open) {
+init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
+ struct nfs4_stateowner *sop = open->op_stateowner;
unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
INIT_LIST_HEAD(&stp->st_hash);
}
static void
-release_stateid(struct nfs4_stateid *stp, int flags) {
+release_stateid(struct nfs4_stateid *stp, int flags)
+{
+ struct file *filp = stp->st_vfs_file;
list_del(&stp->st_hash);
list_del_perfile++;
list_del(&stp->st_perfile);
list_del(&stp->st_perfilestate);
- if ((stp->st_vfs_set) && (flags & OPEN_STATE)) {
- release_stateid_lockowner(stp);
- nfsd_close(stp->st_vfs_file);
+ if (flags & OPEN_STATE) {
+ release_stateid_lockowners(stp);
+ stp->st_vfs_file = NULL;
+ nfsd_close(filp);
vfsclose++;
- } else if ((stp->st_vfs_set) && (flags & LOCK_STATE)) {
- struct file *filp = stp->st_vfs_file;
-
+ } else if (flags & LOCK_STATE)
locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
- }
kfree(stp);
stp = NULL;
}
}
void
-release_state_owner(struct nfs4_stateid *stp, struct nfs4_stateowner **sopp,
- int flag)
+release_state_owner(struct nfs4_stateid *stp, int flag)
{
struct nfs4_stateowner *sop = stp->st_stateowner;
struct nfs4_file *fp = stp->st_file;
if (sop->so_confirmed && list_empty(&sop->so_perfilestate))
move_to_close_lru(sop);
/* unused nfs4_file's are releseed. XXX slab cache? */
- if (list_empty(&fp->fi_perfile)) {
+ if (list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) {
release_file(fp);
}
}
(sop->so_client->cl_clientid.cl_id == clid->cl_id));
}
-/* search ownerstr_hashtbl[] for owner */
-static int
-find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, struct nfs4_stateowner **op) {
- struct nfs4_stateowner *local = NULL;
+static struct nfs4_stateowner *
+find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
+{
+ struct nfs4_stateowner *so = NULL;
- list_for_each_entry(local, &ownerstr_hashtbl[hashval], so_strhash) {
- if (!cmp_owner_str(local, &open->op_owner, &open->op_clientid))
- continue;
- *op = local;
- return(1);
+ list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
+ if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
+ return so;
}
- return 0;
-}
-
-/* see if clientid is in confirmed hash table */
-static int
-verify_clientid(struct nfs4_client **client, clientid_t *clid) {
-
- struct nfs4_client *clp;
- unsigned int idhashval = clientid_hashval(clid->cl_id);
-
- list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
- if (!cmp_clid(&clp->cl_clientid, clid))
- continue;
- *client = clp;
- return 1;
- }
- *client = NULL;
- return 0;
+ return NULL;
}
/* search file_hashtbl[] for file */
-static int
-find_file(unsigned int hashval, struct inode *ino, struct nfs4_file **fp) {
- struct nfs4_file *local = NULL;
+static struct nfs4_file *
+find_file(struct inode *ino)
+{
+ unsigned int hashval = file_hashval(ino);
+ struct nfs4_file *fp;
- list_for_each_entry(local, &file_hashtbl[hashval], fi_hash) {
- if (local->fi_inode == ino) {
- *fp = local;
- return(1);
- }
+ list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
+ if (fp->fi_inode == ino)
+ return fp;
}
- return 0;
+ return NULL;
}
#define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
{
struct inode *ino = current_fh->fh_dentry->d_inode;
- unsigned int fi_hashval;
struct nfs4_file *fp;
struct nfs4_stateid *stp;
dprintk("NFSD: nfs4_share_conflict\n");
- fi_hashval = file_hashval(ino);
- if (find_file(fi_hashval, ino, &fp)) {
+ fp = find_file(ino);
+ if (fp) {
/* Search for conflicting share reservations */
list_for_each_entry(stp, &fp->fi_perfile, st_perfile) {
if (test_bit(deny_type, &stp->st_deny_bmap) ||
}
}
+/*
+ * Recall a delegation
+ */
+static int
+do_recall(void *__dp)
+{
+ struct nfs4_delegation *dp = __dp;
+
+ daemonize("nfsv4-recall");
+
+ nfsd4_cb_recall(dp);
+ return 0;
+}
+
+/*
+ * Spawn a thread to perform a recall on the delegation represented
+ * by the lease (file_lock)
+ *
+ * Called from break_lease() with lock_kernel() held.
+ * Note: we assume break_lease will only call this *once* for any given
+ * lease.
+ */
+static
+void nfsd_break_deleg_cb(struct file_lock *fl)
+{
+ struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
+ struct task_struct *t;
+
+ dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
+ if (!dp)
+ return;
+
+ /* We're assuming the state code never drops its reference
+ * without first removing the lease. Since we're in this lease
+ * callback (and since the lease code is serialized by the kernel
+ * 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);
+
+ spin_lock(&recall_lock);
+ list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
+ spin_unlock(&recall_lock);
+
+ /* only place dl_time is set. protected by lock_kernel*/
+ dp->dl_time = get_seconds();
+
+ /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
+ fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
+
+ t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
+ if (IS_ERR(t)) {
+ struct nfs4_client *clp = dp->dl_client;
+
+ printk(KERN_INFO "NFSD: Callback thread failed for "
+ "for client (clientid %08x/%08x)\n",
+ clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
+ nfs4_put_delegation(dp);
+ }
+}
+
+/*
+ * The file_lock is being reapd.
+ *
+ * Called by locks_free_lock() with lock_kernel() held.
+ */
+static
+void nfsd_release_deleg_cb(struct file_lock *fl)
+{
+ struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
+
+ dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
+
+ if (!(fl->fl_flags & FL_LEASE) || !dp)
+ return;
+ dp->dl_flock = NULL;
+}
+
+/*
+ * Set the delegation file_lock back pointer.
+ *
+ * Called from __setlease() with lock_kernel() held.
+ */
+static
+void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
+{
+ struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
+
+ dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
+ if (!dp)
+ return;
+ dp->dl_flock = new;
+}
+
+/*
+ * Called from __setlease() with lock_kernel() held
+ */
+static
+int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
+{
+ struct nfs4_delegation *onlistd =
+ (struct nfs4_delegation *)onlist->fl_owner;
+ struct nfs4_delegation *tryd =
+ (struct nfs4_delegation *)try->fl_owner;
+
+ if (onlist->fl_lmops != try->fl_lmops)
+ return 0;
+
+ return onlistd->dl_client == tryd->dl_client;
+}
+
+
+static
+int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
+{
+ if (arg & F_UNLCK)
+ return lease_modify(onlist, arg);
+ else
+ return -EAGAIN;
+}
+
+struct lock_manager_operations nfsd_lease_mng_ops = {
+ .fl_break = nfsd_break_deleg_cb,
+ .fl_release_private = nfsd_release_deleg_cb,
+ .fl_copy_lock = nfsd_copy_lock_deleg_cb,
+ .fl_mylease = nfsd_same_client_deleg_cb,
+ .fl_change = nfsd_change_deleg_cb,
+};
+
/*
* nfsd4_process_open1()
if (!check_name(open->op_owner))
goto out;
- status = nfserr_stale_clientid;
if (STALE_CLIENTID(&open->op_clientid))
- return status;
+ return nfserr_stale_clientid;
strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
- if (find_openstateowner_str(strhashval, open, &sop)) {
+ sop = find_openstateowner_str(strhashval, open);
+ if (sop) {
open->op_stateowner = sop;
/* check for replay */
if (open->op_seqid == sop->so_seqid){
- if (!sop->so_replay.rp_buflen) {
- /*
- * The original OPEN failed in so spectacularly that we
- * don't even have replay data saved! Therefore, we
- * have no choice but to continue processing
- * this OPEN; presumably, we'll fail again for the same
- * reason.
- */
- dprintk("nfsd4_process_open1: replay with no replay cache\n");
- status = NFS_OK;
+ if (sop->so_replay.rp_buflen)
+ return NFSERR_REPLAY_ME;
+ else {
+ /* The original OPEN failed so spectacularly
+ * that we don't even have replay data saved!
+ * Therefore, we have no choice but to continue
+ * processing this OPEN; presumably, we'll
+ * fail again for the same reason.
+ */
+ dprintk("nfsd4_process_open1:"
+ " replay with no replay cache\n");
goto renew;
}
- /* replay: indicate to calling function */
- status = NFSERR_REPLAY_ME;
- return status;
- }
- if (sop->so_confirmed) {
- if (open->op_seqid == sop->so_seqid + 1) {
- status = nfs_ok;
+ } else if (sop->so_confirmed) {
+ if (open->op_seqid == sop->so_seqid + 1)
goto renew;
- }
status = nfserr_bad_seqid;
goto out;
+ } else {
+ /* If we get here, we received an OPEN for an
+ * unconfirmed nfs4_stateowner. Since the seqid's are
+ * different, purge the existing nfs4_stateowner, and
+ * instantiate a new one.
+ */
+ clp = sop->so_client;
+ release_stateowner(sop);
}
- /* If we get here, we received and OPEN for an unconfirmed
- * nfs4_stateowner.
- * Since the sequid's are different, purge the
- * existing nfs4_stateowner, and instantiate a new one.
+ } else {
+ /* nfs4_stateowner not found.
+ * Verify clientid and instantiate new nfs4_stateowner.
+ * If verify fails this is presumably the result of the
+ * client's lease expiring.
*/
- clp = sop->so_client;
- release_stateowner(sop);
- goto instantiate_new_owner;
- }
- /* nfs4_stateowner not found.
- * verify clientid and instantiate new nfs4_stateowner
- * if verify fails this is presumably the result of the
- * client's lease expiring.
- *
- * XXX compare clp->cl_addr with rqstp addr?
- */
- status = nfserr_expired;
- if (!verify_clientid(&clp, clientid))
- goto out;
-instantiate_new_owner:
+ status = nfserr_expired;
+ clp = find_confirmed_client(clientid);
+ if (clp == NULL)
+ goto out;
+ }
status = nfserr_resource;
- if (!(sop = alloc_init_open_stateowner(strhashval, clp, open)))
+ sop = alloc_init_open_stateowner(strhashval, clp, open);
+ if (sop == NULL)
goto out;
open->op_stateowner = sop;
- status = nfs_ok;
renew:
+ status = nfs_ok;
renew_client(sop->so_client);
out:
if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
}
static int
-nfs4_check_open(struct nfs4_file *fp, struct nfs4_stateowner *sop, struct nfsd4_open *open, struct nfs4_stateid **stpp)
+nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
{
struct nfs4_stateid *local;
int status = nfserr_share_denied;
+ struct nfs4_stateowner *sop = open->op_stateowner;
list_for_each_entry(local, &fp->fi_perfile, st_perfile) {
- /* have we seen this open owner */
- if (local->st_stateowner == sop) {
- *stpp = local;
- continue;
- }
/* ignore lock owners */
if (local->st_stateowner->so_is_open_owner == 0)
continue;
+ /* remember if we have seen this open owner */
+ if (local->st_stateowner == sop)
+ *stpp = local;
/* check for conflicting share reservations */
if (!test_share(local, open))
goto out;
return status;
}
vfsopen++;
- stp->st_vfs_set = 1;
*stpp = stp;
return 0;
}
+static inline int
+nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
+ struct nfsd4_open *open)
+{
+ struct iattr iattr = {
+ .ia_valid = ATTR_SIZE,
+ .ia_size = 0,
+ };
+ if (!open->op_truncate)
+ return 0;
+ if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
+ return -EINVAL;
+ return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
+}
+
static int
nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
{
share_access = ~share_access;
share_access &= open->op_share_access;
- /* update the struct file */
- if (share_access & NFS4_SHARE_ACCESS_WRITE) {
- status = get_write_access(inode);
- if (status)
- return nfserrno(status);
- if (open->op_truncate) {
- struct iattr iattr = {
- .ia_valid = ATTR_SIZE,
- .ia_size = 0,
- };
- status = nfsd_setattr(rqstp, cur_fh, &iattr, 0,
- (time_t)0);
- if (status) {
- put_write_access(inode);
- return status;
- }
- }
+ if (!(share_access & NFS4_SHARE_ACCESS_WRITE))
+ return nfsd4_truncate(rqstp, cur_fh, open);
- /* remember the open */
- filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
- set_bit(open->op_share_access, &stp->st_access_bmap);
- set_bit(open->op_share_deny, &stp->st_deny_bmap);
+ status = get_write_access(inode);
+ if (status)
+ return nfserrno(status);
+ status = nfsd4_truncate(rqstp, cur_fh, open);
+ if (status) {
+ put_write_access(inode);
+ return status;
}
+ /* remember the open */
+ filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
+ set_bit(open->op_share_access, &stp->st_access_bmap);
+ set_bit(open->op_share_deny, &stp->st_deny_bmap);
+
return nfs_ok;
}
}
}
+/*
+ * Attempt to hand out a delegation.
+ */
+static void
+nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
+{
+ struct nfs4_delegation *dp;
+ struct nfs4_stateowner *sop = stp->st_stateowner;
+ struct nfs4_callback *cb = &sop->so_client->cl_callback;
+ struct file_lock fl, *flp = &fl;
+ int status, flag = 0;
+
+ flag = NFS4_OPEN_DELEGATE_NONE;
+ if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL
+ || !atomic_read(&cb->cb_set) || !sop->so_confirmed)
+ goto out;
+
+ if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
+ flag = NFS4_OPEN_DELEGATE_WRITE;
+ else
+ flag = NFS4_OPEN_DELEGATE_READ;
+
+ dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
+ if (dp == NULL) {
+ flag = NFS4_OPEN_DELEGATE_NONE;
+ goto out;
+ }
+ locks_init_lock(&fl);
+ fl.fl_lmops = &nfsd_lease_mng_ops;
+ fl.fl_flags = FL_LEASE;
+ fl.fl_end = OFFSET_MAX;
+ fl.fl_owner = (fl_owner_t)dp;
+ fl.fl_file = stp->st_vfs_file;
+ fl.fl_pid = current->tgid;
+
+ /* setlease checks to see if delegation should be handed out.
+ * the lock_manager callbacks fl_mylease and fl_change are used
+ */
+ if ((status = setlease(stp->st_vfs_file,
+ flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
+ dprintk("NFSD: setlease failed [%d], no delegation\n", status);
+ unhash_delegation(dp);
+ flag = NFS4_OPEN_DELEGATE_NONE;
+ goto out;
+ }
+
+ memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
+
+ dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
+ dp->dl_stateid.si_boot,
+ dp->dl_stateid.si_stateownerid,
+ dp->dl_stateid.si_fileid,
+ dp->dl_stateid.si_generation);
+out:
+ open->op_delegate_type = flag;
+}
+
/*
* called with nfs4_lock_state() held.
*/
int
nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
{
- struct nfs4_stateowner *sop = open->op_stateowner;
struct nfs4_file *fp = NULL;
- struct inode *ino;
- unsigned int fi_hashval;
+ struct inode *ino = current_fh->fh_dentry->d_inode;
struct nfs4_stateid *stp = NULL;
int status;
- status = nfserr_resource;
- if (!sop)
- return status;
-
- ino = current_fh->fh_dentry->d_inode;
-
status = nfserr_inval;
if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
goto out;
/*
- * Lookup file; if found, lookup stateid and check open request;
- * not found, create
+ * Lookup file; if found, lookup stateid and check open request,
+ * and check for delegations in the process of being recalled.
+ * If not found, create the nfs4_file struct
*/
- fi_hashval = file_hashval(ino);
- if (find_file(fi_hashval, ino, &fp)) {
- status = nfs4_check_open(fp, sop, open, &stp);
- if (status)
+ fp = find_file(ino);
+ if (fp) {
+ if ((status = nfs4_check_open(fp, open, &stp)))
goto out;
} else {
status = nfserr_resource;
- if ((fp = alloc_init_file(fi_hashval, ino)) == NULL)
+ fp = alloc_init_file(ino);
+ if (fp == NULL)
goto out;
}
flags = MAY_READ;
if ((status = nfs4_new_open(rqstp, &stp, current_fh, flags)))
goto out;
- init_stateid(stp, fp, sop, open);
- if (open->op_truncate) {
- struct iattr iattr = {
- .ia_valid = ATTR_SIZE,
- .ia_size = 0,
- };
- status = nfsd_setattr(rqstp, current_fh, &iattr, 0,
- (time_t)0);
- if (status) {
- release_stateid(stp, OPEN_STATE);
- goto out;
- }
+ init_stateid(stp, fp, open);
+ status = nfsd4_truncate(rqstp, current_fh, open);
+ if (status) {
+ release_stateid(stp, OPEN_STATE);
+ goto out;
}
}
- dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
- stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
- stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
-
memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
- open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
+ /*
+ * Attempt to hand out a delegation. No error return, because the
+ * OPEN succeeds even if we fail.
+ */
+ nfs4_open_delegation(current_fh, open, stp);
+
status = nfs_ok;
+
+ dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
+ stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
+ stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
out:
/* take the opportunity to clean up unused state */
- if (fp && list_empty(&fp->fi_perfile))
+ if (fp && list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile))
release_file(fp);
/* CLAIM_PREVIOUS has different error returns */
nfsd4_renew(clientid_t *clid)
{
struct nfs4_client *clp;
- unsigned int idhashval;
int status;
nfs4_lock_state();
status = nfserr_stale_clientid;
if (STALE_CLIENTID(clid))
goto out;
- status = nfs_ok;
- idhashval = clientid_hashval(clid->cl_id);
- list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
- if (!cmp_clid(&clp->cl_clientid, clid))
- continue;
- renew_client(clp);
+ clp = find_confirmed_client(clid);
+ status = nfserr_expired;
+ if (clp == NULL) {
+ /* We assume the client took too long to RENEW. */
+ dprintk("nfsd4_renew: clientid not found!\n");
goto out;
}
- list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
- if (!cmp_clid(&clp->cl_clientid, clid))
- continue;
- renew_client(clp);
- goto out;
- }
- /*
- * Couldn't find an nfs4_client for this clientid.
- * Presumably this is because the client took too long to
- * RENEW, so return NFS4ERR_EXPIRED.
- */
- dprintk("nfsd4_renew: clientid not found!\n");
- status = nfserr_expired;
+ renew_client(clp);
+ status = nfserr_cb_path_down;
+ if (!list_empty(&clp->cl_del_perclnt)
+ && !atomic_read(&clp->cl_callback.cb_set))
+ goto out;
+ status = nfs_ok;
out:
nfs4_unlock_state();
return status;
{
struct nfs4_client *clp;
struct nfs4_stateowner *sop;
- struct list_head *pos, *next;
+ 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, close_val = NFSD_LEASE_TIME;
+ time_t u, test_val = NFSD_LEASE_TIME;
nfs4_lock_state();
- dprintk("NFSD: laundromat service - starting, examining clients\n");
+ dprintk("NFSD: laundromat service - starting\n");
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)) {
clp->cl_clientid.cl_id);
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);
+ if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
+ u = dp->dl_time - cutoff;
+ if (test_val > u)
+ test_val = u;
+ break;
+ }
+ dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
+ dp, dp->dl_flock);
+ list_move(&dp->dl_recall_lru, &reaplist);
+ }
+ spin_unlock(&recall_lock);
+ list_for_each_safe(pos, next, &reaplist) {
+ 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;
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)) {
u = sop->so_time - cutoff;
- if (close_val > u)
- close_val = u;
+ if (test_val > u)
+ test_val = u;
break;
}
dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
static inline int
nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
{
- return (stp->st_vfs_set == 0 ||
- fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode);
+ return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode;
}
static int
return 1;
}
+static inline int
+access_permit_read(unsigned long access_bmap)
+{
+ return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
+ test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
+ test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
+}
+
+static inline int
+access_permit_write(unsigned long access_bmap)
+{
+ return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
+ test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
+}
+
+static
+int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
+{
+ int status = nfserr_openmode;
+
+ if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
+ goto out;
+ if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
+ goto out;
+ status = nfs_ok;
+out:
+ return status;
+}
+
+static inline int
+nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
+{
+ if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
+ return nfserr_openmode;
+ else
+ return nfs_ok;
+}
+
+static inline int
+check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
+{
+ /* Trying to call delegreturn with a special stateid? Yuch: */
+ if (!(flags & (RD_STATE | WR_STATE)))
+ return nfserr_bad_stateid;
+ else if (ONE_STATEID(stateid) && (flags & RD_STATE))
+ return nfs_ok;
+ else if (nfs4_in_grace()) {
+ /* Answer in remaining cases depends on existance of
+ * conflicting state; so we must wait out the grace period. */
+ return nfserr_grace;
+ } else if (flags & WR_STATE)
+ return nfs4_share_conflict(current_fh,
+ NFS4_SHARE_DENY_WRITE);
+ else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
+ return nfs4_share_conflict(current_fh,
+ NFS4_SHARE_DENY_READ);
+}
+
+/*
+ * Allow READ/WRITE during grace period on recovered state only for files
+ * that are not able to provide mandatory locking.
+ */
+static inline int
+io_during_grace_disallowed(struct inode *inode, int flags)
+{
+ return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
+ && MANDATORY_LOCK(inode);
+}
/*
* Checks for stateid operations
*/
int
-nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct nfs4_stateid **stpp)
+nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
{
- struct nfs4_stateid *stp;
+ struct nfs4_stateid *stp = NULL;
+ struct nfs4_delegation *dp = NULL;
+ stateid_t *stidp;
+ struct inode *ino = current_fh->fh_dentry->d_inode;
int status;
dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
stateid->si_boot, stateid->si_stateownerid,
stateid->si_fileid, stateid->si_generation);
+ if (filpp)
+ *filpp = NULL;
- *stpp = NULL;
+ if (io_during_grace_disallowed(ino, flags))
+ return nfserr_grace;
+
+ if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
+ return check_special_stateids(current_fh, stateid, flags);
/* STALE STATEID */
status = nfserr_stale_stateid;
/* BAD STATEID */
status = nfserr_bad_stateid;
- if (!(stp = find_stateid(stateid, flags))) {
- dprintk("NFSD: preprocess_stateid_op: no open stateid!\n");
- goto out;
- }
- if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
- dprintk("NFSD: preprocess_stateid_op: fh-stateid mismatch!\n");
- stp->st_vfs_set = 0;
- goto out;
- }
- if (!stp->st_stateowner->so_confirmed) {
- dprintk("preprocess_stateid_op: lockowner not confirmed yet!\n");
- goto out;
+ if (!stateid->si_fileid) { /* delegation stateid */
+ if(!(dp = find_delegation_stateid(ino, stateid))) {
+ dprintk("NFSD: delegation stateid not found\n");
+ if (nfs4_in_grace())
+ status = nfserr_grace;
+ goto out;
+ }
+ stidp = &dp->dl_stateid;
+ } else { /* open or lock stateid */
+ if (!(stp = find_stateid(stateid, flags))) {
+ dprintk("NFSD: open or lock stateid not found\n");
+ if (nfs4_in_grace())
+ status = nfserr_grace;
+ goto out;
+ }
+ if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
+ goto out;
+ if (!stp->st_stateowner->so_confirmed)
+ goto out;
+ stidp = &stp->st_stateid;
}
- if (stateid->si_generation > stp->st_stateid.si_generation) {
- dprintk("preprocess_stateid_op: future stateid?!\n");
+ if (stateid->si_generation > stidp->si_generation)
goto out;
- }
/* OLD STATEID */
status = nfserr_old_stateid;
- if (stateid->si_generation < stp->st_stateid.si_generation) {
- dprintk("preprocess_stateid_op: old stateid!\n");
+ if (stateid->si_generation < stidp->si_generation)
goto out;
+ if (stp) {
+ if ((status = nfs4_check_openmode(stp,flags)))
+ goto out;
+ renew_client(stp->st_stateowner->so_client);
+ if (filpp)
+ *filpp = stp->st_vfs_file;
+ } else if (dp) {
+ if ((status = nfs4_check_delegmode(dp, flags)))
+ goto out;
+ renew_client(dp->dl_client);
+ if (flags & DELEG_RET)
+ unhash_delegation(dp);
+ if (filpp)
+ *filpp = dp->dl_vfs_file;
}
- *stpp = stp;
status = nfs_ok;
- renew_client(stp->st_stateowner->so_client);
out:
return status;
}
if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
- stp->st_vfs_set = 0;
goto out;
}
goto out;
}
-/*
- * eventually, this will perform an upcall to the 'state daemon' as well as
- * set the cl_first_state field.
- */
-void
-first_state(struct nfs4_client *clp)
-{
- if (!clp->cl_first_state)
- clp->cl_first_state = get_seconds();
-}
-
int
nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
{
stp->st_stateid.si_stateownerid,
stp->st_stateid.si_fileid,
stp->st_stateid.si_generation);
- status = nfs_ok;
- first_state(sop->so_client);
out:
if (oc->oc_stateowner)
nfs4_get_stateowner(oc->oc_stateowner);
memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
/* release_state_owner() calls nfsd_close() if needed */
- release_state_owner(stp, &close->cl_stateowner, OPEN_STATE);
+ release_state_owner(stp, OPEN_STATE);
out:
if (close->cl_stateowner)
nfs4_get_stateowner(close->cl_stateowner);
return status;
}
+int
+nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
+{
+ int status;
+
+ if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
+ goto out;
+
+ nfs4_lock_state();
+ status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
+ nfs4_unlock_state();
+out:
+ return status;
+}
+
+
/*
* Lock owner state (byte-range locks)
*/
#define lockownerid_hashval(id) \
((id) & LOCK_HASH_MASK)
-#define lock_ownerstr_hashval(x, clientid, ownername) \
- ((file_hashval(x) + (clientid) + opaque_hashval((ownername.data), (ownername.len))) & LOCK_HASH_MASK)
+
+static inline unsigned int
+lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
+ struct xdr_netobj *ownername)
+{
+ return (file_hashval(inode) + cl_id
+ + opaque_hashval(ownername->data, ownername->len))
+ & LOCK_HASH_MASK;
+}
static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
unsigned int hashval;
dprintk("NFSD: find_stateid flags 0x%x\n",flags);
- if ((flags & LOCK_STATE) || (flags & RDWR_STATE)) {
+ if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
hashval = stateid_hashval(st_id, f_id);
list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
if ((local->st_stateid.si_stateownerid == st_id) &&
return local;
}
}
- if ((flags & OPEN_STATE) || (flags & RDWR_STATE)) {
+ if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
hashval = stateid_hashval(st_id, f_id);
list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
if ((local->st_stateid.si_stateownerid == st_id) &&
return NULL;
}
+static struct nfs4_delegation *
+find_delegation_stateid(struct inode *ino, stateid_t *stid)
+{
+ struct nfs4_delegation *dp = NULL;
+ struct nfs4_file *fp = NULL;
+ u32 st_id;
+
+ dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
+ stid->si_boot, stid->si_stateownerid,
+ stid->si_fileid, stid->si_generation);
+
+ st_id = stid->si_stateownerid;
+ fp = find_file(ino);
+ if (fp) {
+ list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) {
+ if(dp->dl_stateid.si_stateownerid == st_id) {
+ dprintk("NFSD: find_delegation dp %p\n",dp);
+ return dp;
+ }
+ }
+ }
+ return NULL;
+}
/*
* TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
return NULL;
}
-static int
-find_lockstateowner_str(unsigned int hashval, struct xdr_netobj *owner, clientid_t *clid, struct nfs4_stateowner **op) {
- struct nfs4_stateowner *local = NULL;
+static struct nfs4_stateowner *
+find_lockstateowner_str(struct inode *inode, clientid_t *clid,
+ struct xdr_netobj *owner)
+{
+ unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
+ struct nfs4_stateowner *op;
- list_for_each_entry(local, &lock_ownerstr_hashtbl[hashval], so_strhash) {
- if (!cmp_owner_str(local, owner, clid))
- continue;
- *op = local;
- return(1);
+ list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
+ if (cmp_owner_str(op, owner, clid))
+ return op;
}
- *op = NULL;
- return 0;
+ return NULL;
}
/*
sop->so_time = 0;
list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
- list_add(&sop->so_perclient, &clp->cl_perclient);
list_add(&sop->so_perlockowner, &open_stp->st_perlockowner);
- add_perclient++;
sop->so_is_open_owner = 0;
sop->so_id = current_ownerid++;
sop->so_client = clp;
rp->rp_status = NFSERR_SERVERFAULT;
rp->rp_buflen = 0;
rp->rp_buf = rp->rp_ibuf;
- alloc_lsowner++;
return sop;
}
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_vfs_set = open_stp->st_vfs_set;
stp->st_access_bmap = open_stp->st_access_bmap;
stp->st_deny_bmap = open_stp->st_deny_bmap;
fp = open_stp->st_file;
strhashval = lock_ownerstr_hashval(fp->fi_inode,
open_sop->so_client->cl_clientid.cl_id,
- lock->v.new.owner);
+ &lock->v.new.owner);
/*
* If we already have this lock owner, the client is in
* error (or our bookeeping is wrong!)
if (!seqid_mutating_err(status))
open_sop->so_seqid--;
- release_state_owner(lock_stp, &lock->lk_stateowner, LOCK_STATE);
+ release_state_owner(lock_stp, LOCK_STATE);
}
out:
if (lock->lk_stateowner)
struct file file;
struct file_lock file_lock;
struct file_lock *conflicting_lock;
- unsigned int strhashval;
int status;
if (nfs4_in_grace())
goto out;
}
- strhashval = lock_ownerstr_hashval(inode,
- lockt->lt_clientid.cl_id, lockt->lt_owner);
-
- find_lockstateowner_str(strhashval, &lockt->lt_owner,
- &lockt->lt_clientid,
- &lockt->lt_stateowner);
+ lockt->lt_stateowner = find_lockstateowner_str(inode,
+ &lockt->lt_clientid, &lockt->lt_owner);
if (lockt->lt_stateowner)
file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
file_lock.fl_pid = current->tgid;
status = nfserr_locks_held;
list_for_each_entry(stp, &local->so_perfilestate,
st_perfilestate) {
- if (stp->st_vfs_set) {
- if (check_for_locks(stp->st_vfs_file, local))
- goto out;
- }
+ if (check_for_locks(stp->st_vfs_file, local))
+ goto out;
}
/* no locks held by (lock) stateowner */
status = nfs_ok;
* failure => all reset bets are off, nfserr_no_grace...
*/
static int
-nfs4_client_to_reclaim(struct nfs4_client *clp)
+nfs4_client_to_reclaim(char *name, int namlen)
{
unsigned int strhashval;
struct nfs4_client_reclaim *crp = NULL;
- crp = alloc_reclaim(clp->cl_name.len);
+ dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen, name);
+ crp = alloc_reclaim(namlen);
if (!crp)
return 0;
- strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len);
+ strhashval = clientstr_hashval(name, namlen);
INIT_LIST_HEAD(&crp->cr_strhash);
list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
- memcpy(crp->cr_name.data, clp->cl_name.data, clp->cl_name.len);
- crp->cr_name.len = clp->cl_name.len;
- crp->cr_first_state = clp->cl_first_state;
- crp->cr_expired = 0;
+ memcpy(crp->cr_name.data, name, namlen);
+ crp->cr_name.len = namlen;
+ reclaim_str_hashtbl_size++;
return 1;
}
struct nfs4_client_reclaim *
nfs4_find_reclaim_client(clientid_t *clid)
{
- unsigned int idhashval = clientid_hashval(clid->cl_id);
unsigned int strhashval;
- struct nfs4_client *clp, *client = NULL;
+ struct nfs4_client *clp;
struct nfs4_client_reclaim *crp = NULL;
/* find clientid in conf_id_hashtbl */
- list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
- if (cmp_clid(&clp->cl_clientid, clid)) {
- client = clp;
- break;
- }
- }
- if (!client)
+ clp = find_confirmed_client(clid);
+ if (clp == NULL)
return NULL;
+ dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n",
+ clp->cl_name.len, clp->cl_name.data);
+
/* find clp->cl_name in reclaim_str_hashtbl */
- strhashval = clientstr_hashval(client->cl_name.data,
- client->cl_name.len);
+ strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len);
list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
- if (cmp_name(&crp->cr_name, &client->cl_name)) {
+ if (cmp_name(&crp->cr_name, &clp->cl_name)) {
return crp;
}
}
if ((crp = nfs4_find_reclaim_client(clid)) == NULL)
return nfserr_reclaim_bad;
- if (crp->cr_expired)
- return nfserr_no_grace;
return nfs_ok;
}
* Start and stop routines
*/
-void
-nfs4_state_init(void)
+static void
+__nfs4_state_init(void)
{
int i;
time_t grace_time;
- if (nfs4_init)
- return;
if (!nfs4_reclaim_init) {
for (i = 0; i < CLIENT_HASH_SIZE; i++)
INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
INIT_LIST_HEAD(&close_lru);
INIT_LIST_HEAD(&client_lru);
+ INIT_LIST_HEAD(&del_recall_lru);
+ spin_lock_init(&recall_lock);
boot_time = get_seconds();
grace_time = max(old_lease_time, lease_time);
if (reclaim_str_hashtbl_size == 0)
grace_end = boot_time + grace_time;
INIT_WORK(&laundromat_work,laundromat_main, NULL);
schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ);
+}
+
+int
+nfs4_state_init(void)
+{
+ int status;
+
+ if (nfs4_init)
+ return 0;
+ status = nfsd4_init_slabs();
+ if (status)
+ return status;
+ __nfs4_state_init();
nfs4_init = 1;
+ return 0;
}
int
{
int i;
struct nfs4_client *clp = NULL;
+ struct nfs4_delegation *dp = NULL;
+ struct nfs4_stateowner *sop = NULL;
+ struct list_head *pos, *next, reaplist;
+
+ list_for_each_safe(pos, next, &close_lru) {
+ sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
+ list_del(&sop->so_close_lru);
+ nfs4_put_stateowner(sop);
+ }
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
while (!list_empty(&conf_id_hashtbl[i])) {
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_move(&dp->dl_recall_lru, &reaplist);
+ }
+ spin_unlock(&recall_lock);
+ list_for_each_safe(pos, next, &reaplist) {
+ dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
+ list_del_init(&dp->dl_recall_lru);
+ unhash_delegation(dp);
+ }
+
release_all_files();
cancel_delayed_work(&laundromat_work);
flush_scheduled_work();
add_perclient, del_perclient);
dprintk("NFSD: alloc_file %d free_file %d\n",
alloc_file, free_file);
- dprintk("NFSD: alloc_sowner %d alloc_lsowner %d free_sowner %d\n",
- alloc_sowner, alloc_lsowner, free_sowner);
dprintk("NFSD: vfsopen %d vfsclose %d\n",
vfsopen, vfsclose);
+ dprintk("NFSD: alloc_delegation %d free_delegation %d\n",
+ alloc_delegation, free_delegation);
+
}
void
nfs4_state_shutdown(void)
{
+ if (!nfs4_init)
+ return;
+
nfs4_lock_state();
nfs4_release_reclaim();
__nfs4_state_shutdown();
+ nfsd4_free_slabs();
nfs4_unlock_state();
}
/* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
list_for_each_entry(clp, &conf_id_hashtbl[i], cl_idhash) {
- if (!nfs4_client_to_reclaim(clp)) {
+ if (!nfs4_client_to_reclaim(clp->cl_name.data,
+ clp->cl_name.len)) {
nfs4_release_reclaim();
goto init_state;
}
- reclaim_str_hashtbl_size++;
}
}
init_state:
__nfs4_state_shutdown();
- nfs4_state_init();
+ __nfs4_state_init();
nfs4_unlock_state();
}
git://git.onelab.eu / linux-2.6.git / blobdiff