#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 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_delegation(struct nfs4_delegation *dp);
+static void release_stateid_lockowner(struct nfs4_stateid *open_stp);
/* Locking:
*
down(&client_sema);
}
-/*
- * nfs4_unlock_state(); called in encode
- */
void
nfs4_unlock_state(void)
{
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_file *fp, struct svc_fh *current_fh, u32 type)
+{
+ struct nfs4_delegation *dp;
+
+ 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;
+ dp->dl_stp = NULL;
+ dp->dl_type = type;
+ dp->dl_recall.cbr_dp = NULL;
+ dp->dl_recall.cbr_ident = 0;
+ 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_state, NFS4_NO_RECALL);
+ atomic_set(&dp->dl_count, 1);
+ atomic_set(&dp->dl_recall_cnt, 0);
+ list_add(&dp->dl_del_perfile, &fp->fi_del_perfile);
+ list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt);
+ alloc_delegation++;
+ return dp;
+}
+
+/*
+ * Free the delegation structure.
+ * Called with the recall_lock held.
+ */
+static void
+nfs4_free_delegation(struct nfs4_delegation *dp)
+{
+ dprintk("NFSD: nfs4_free_delegation freeing dp %p\n",dp);
+ list_del(&dp->dl_recall_lru);
+ kfree(dp);
+ free_delegation++;
+}
+
+/* release_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.
+ *
+ * call either:
+ * nfsd_close : if last close, locks_remove_flock calls lease_modify.
+ * otherwise, recalled state set to NFS4_RECALL_COMPLETE
+ * so that it will be reaped by the laundromat service.
+ * or
+ * remove_lease (calls time_out_lease which calls lease_modify).
+ * and nfs4_free_delegation.
+ *
+ * Called with nfs_lock_state() held.
+ * Called with the recall_lock held.
+ */
+
+static void
+release_delegation(struct nfs4_delegation *dp)
+{
+ /* delayed nfsd_close */
+ if (dp->dl_stp) {
+ struct file *filp = dp->dl_stp->st_vfs_file;
+
+ dprintk("NFSD: release_delegation CLOSE\n");
+ release_stateid_lockowner(dp->dl_stp);
+ kfree(dp->dl_stp);
+ dp->dl_stp = NULL;
+ atomic_set(&dp->dl_state, NFS4_RECALL_COMPLETE);
+ nfsd_close(filp);
+ vfsclose++;
+ } else {
+ dprintk("NFSD: release_delegation remove lease dl_flock %p\n",
+ dp->dl_flock);
+ remove_lease(dp->dl_flock);
+ list_del_init(&dp->dl_del_perfile);
+ list_del_init(&dp->dl_del_perclnt);
+ /* dl_count > 0 => outstanding recall rpc */
+ dprintk("NFSD: release_delegation free deleg dl_count %d\n",
+ atomic_read(&dp->dl_count));
+ if ((atomic_read(&dp->dl_state) == NFS4_REAP_DELEG)
+ || atomic_dec_and_test(&dp->dl_count))
+ nfs4_free_delegation(dp);
+ }
+}
/*
* SETCLIENTID state
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;
+
+ dprintk("NFSD: expire_client cl_count %d\n",
+ atomic_read(&clp->cl_count));
- dprintk("NFSD: expire_client\n");
+ /* 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;
+ }
+ 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, dl_state %d, fp %p\n",
+ dp, atomic_read(&dp->dl_state), dp->dl_flock);
+
+ /* force release of delegation. */
+ atomic_set(&dp->dl_state, NFS4_RECALL_COMPLETE);
+ release_delegation(dp);
+ }
+ spin_unlock(&recall_lock);
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;
{
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;
}
/*
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.
status = nfserr_clid_inuse;
else {
expire_client(conf);
+ clp = unconf;
move_to_confirmed(unconf, idhashval);
status = nfs_ok;
}
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;
+ clp = unconf;
move_to_confirmed(unconf, idhashval);
}
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;
}
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 */
+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++;
+}
+
static inline struct nfs4_stateowner *
alloc_stateowner(struct xdr_netobj *owner)
{
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);
return NULL;
}
-/* should use a slab cache */
-static void
-free_stateowner(struct nfs4_stateowner *sop) {
- if (sop) {
- kfree(sop->so_owner.data);
- kfree(sop);
- sop = NULL;
- free_sowner++;
- }
-}
-
static struct nfs4_stateowner *
alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
struct nfs4_stateowner *sop;
{
unhash_stateowner(sop);
list_del(&sop->so_close_lru);
- free_stateowner(sop);
+ nfs4_put_stateowner(sop);
}
static inline void
__set_bit(open->op_share_deny, &stp->st_deny_bmap);
}
+/*
+* Because nfsd_close() can call locks_remove_flock() which removes leases,
+* delay nfsd_close() for delegations from the nfsd_open() clientid
+* until the delegation is reaped.
+*/
static void
-release_stateid(struct nfs4_stateid *stp, int flags) {
+release_stateid(struct nfs4_stateid *stp, int flags)
+{
+ struct nfs4_delegation *dp;
+ struct nfs4_file *fp = stp->st_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)) {
+ list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) {
+ if(cmp_clid(&dp->dl_client->cl_clientid,
+ &stp->st_stateowner->so_client->cl_clientid)) {
+ dp->dl_stp = stp;
+ return;
+ }
+ }
release_stateid_lockowner(stp);
nfsd_close(stp->st_vfs_file);
vfsclose++;
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);
}
}
return nfs_ok;
}
-static inline int
-nfs4_file_upgrade(struct file *filp, unsigned int share_access)
-{
-int status;
-
- if (share_access & NFS4_SHARE_ACCESS_WRITE) {
- status = get_write_access(filp->f_dentry->d_inode);
- if (status)
- return nfserrno(status);
- filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
- }
- return nfs_ok;
-}
-
static inline void
nfs4_file_downgrade(struct file *filp, unsigned int share_access)
{
}
}
+/*
+ * Recall a delegation
+ */
+static int
+do_recall(void *__dp)
+{
+ struct nfs4_delegation *dp = __dp;
+
+ daemonize("nfsv4-recall");
+
+ atomic_inc(&dp->dl_count);
+ 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,
+ *
+ */
+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;
+
+ /* schedule delegation for recall */
+ spin_lock(&recall_lock);
+ atomic_set(&dp->dl_state, NFS4_RECALL_IN_PROGRESS);
+ 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);
+ }
+}
+
+/*
+ * 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, dl_state %d\n", fl,dp, atomic_read(&dp->dl_count), atomic_read(&dp->dl_state));
+
+ if (!(fl->fl_flags & FL_LEASE) || !dp)
+ return;
+ atomic_set(&dp->dl_state,NFS4_RECALL_COMPLETE);
+ 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;
+}
+
+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,
+};
+
+
/*
* nfsd4_process_open1()
status = nfserr_reclaim_bad;
return status;
}
+
+static int
+nfs4_deleg_conflict(u32 share, u32 dtype)
+{
+ return (((share & NFS4_SHARE_ACCESS_WRITE) &&
+ dtype == NFS4_OPEN_DELEGATE_READ) ||
+ ((share & NFS4_SHARE_ACCESS_READ) &&
+ dtype == NFS4_OPEN_DELEGATE_WRITE));
+}
+
+#define DONT_DELEGATE 8
+
+/*
+ * nfs4_check_deleg_recall()
+ *
+ * Test any delegation that is currently within an incompleted recalled
+ * state, and return NFSERR_DELAY for conflicting open share.
+ * flag is set to DONT_DELEGATE for shares that match the deleg type.
+ */
+static int
+nfs4_check_deleg_recall(struct nfs4_file *fp, struct nfsd4_open *op, int *flag)
+{
+ struct nfs4_delegation *dp;
+ int status = 0;
+
+ list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) {
+ dprintk("NFSD: found delegation %p with dl_state %d\n",
+ dp, atomic_read(&dp->dl_state));
+ if (atomic_read(&dp->dl_state) == NFS4_RECALL_IN_PROGRESS) {
+ if(nfs4_deleg_conflict(op->op_share_access, dp->dl_type))
+ status = nfserr_jukebox;
+ else
+ *flag = DONT_DELEGATE;
+ }
+ }
+ return status;
+}
+
+static int
+nfs4_check_open(struct nfs4_file *fp, struct nfs4_stateowner *sop, struct nfsd4_open *open, struct nfs4_stateid **stpp)
+{
+ struct nfs4_stateid *local;
+ int status = nfserr_share_denied;
+
+ 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;
+ /* check for conflicting share reservations */
+ if (!test_share(local, open))
+ goto out;
+ }
+ status = 0;
+out:
+ return status;
+}
+
+static int
+nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
+ struct svc_fh *cur_fh, int flags)
+{
+ struct nfs4_stateid *stp;
+ int status;
+
+ stp = kmalloc(sizeof(struct nfs4_stateid), GFP_KERNEL);
+ if (stp == NULL)
+ return nfserr_resource;
+
+ status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, &stp->st_vfs_file);
+ if (status) {
+ if (status == nfserr_dropit)
+ status = nfserr_jukebox;
+ kfree(stp);
+ return status;
+ }
+ vfsopen++;
+ stp->st_vfs_set = 1;
+ *stpp = stp;
+ return 0;
+}
+
+static int
+nfs4_upgrade_open(struct svc_rqst *rqstp, 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_dentry->d_inode;
+ unsigned int share_access;
+ int status;
+
+ set_access(&share_access, stp->st_access_bmap);
+ 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;
+ }
+ }
+
+ /* 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;
+}
+
+
+/* decrement seqid on successful reclaim, it will be bumped in encode_open */
+static void
+nfs4_set_claim_prev(struct nfsd4_open *open, int *status)
+{
+ if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
+ if (*status)
+ *status = nfserr_reclaim_bad;
+ else {
+ open->op_stateowner->so_confirmed = 1;
+ open->op_stateowner->so_seqid--;
+ }
+ }
+}
+
+/*
+ * Attempt to hand out a delegation.
+ */
+static void
+nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp, int *flag)
+{
+ 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;
+
+ if (*flag == DONT_DELEGATE) {
+ *flag = NFS4_OPEN_DELEGATE_NONE;
+ return;
+ }
+
+ /* set flag */
+ *flag = NFS4_OPEN_DELEGATE_NONE;
+ if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL
+ || !atomic_read(&cb->cb_set) || !sop->so_confirmed)
+ return;
+
+ if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
+ *flag = NFS4_OPEN_DELEGATE_READ;
+
+ else if (!(open->op_share_access & NFS4_SHARE_ACCESS_READ))
+ *flag = NFS4_OPEN_DELEGATE_WRITE;
+
+ if (!(dp = alloc_init_deleg(sop->so_client, stp->st_file, fh, *flag)))
+ return;
+ 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;
+
+ 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);
+ list_del(&dp->dl_del_perfile);
+ list_del(&dp->dl_del_perclnt);
+ kfree(dp);
+ free_delegation++;
+ *flag = NFS4_OPEN_DELEGATE_NONE;
+ return;
+ }
+
+ 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);
+}
+
/*
* called with nfs4_lock_state() held.
*/
int
nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
{
- struct iattr iattr;
struct nfs4_stateowner *sop = open->op_stateowner;
struct nfs4_file *fp = NULL;
- struct inode *ino;
+ struct inode *ino = current_fh->fh_dentry->d_inode;
unsigned int fi_hashval;
- struct nfs4_stateid *stq, *stp = NULL;
- int status;
-
- status = nfserr_resource;
- if (!sop)
- return status;
-
- ino = current_fh->fh_dentry->d_inode;
+ struct nfs4_stateid *stp = NULL;
+ int status, delegflag = 0;
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,
+ * 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)) {
- /* Search for conflicting share reservations */
- status = nfserr_share_denied;
- list_for_each_entry(stq, &fp->fi_perfile, st_perfile) {
- if (stq->st_stateowner == sop) {
- stp = stq;
- continue;
- }
- /* ignore lock owners */
- if (stq->st_stateowner->so_is_open_owner == 0)
- continue;
- if (!test_share(stq,open))
- goto out;
- }
+ if ((status = nfs4_check_open(fp, sop, open, &stp)))
+ goto out;
+ if ((status = nfs4_check_deleg_recall(fp, open, &delegflag)))
+ goto out;
} else {
- /* No nfs4_file found; allocate and init a new one */
status = nfserr_resource;
if ((fp = alloc_init_file(fi_hashval, ino)) == NULL)
goto out;
}
- if (!stp) {
- int flags = 0;
-
- status = nfserr_resource;
- if ((stp = kmalloc(sizeof(struct nfs4_stateid),
- GFP_KERNEL)) == NULL)
+ /*
+ * OPEN the file, or upgrade an existing OPEN.
+ * If truncate fails, the OPEN fails.
+ */
+ if (stp) {
+ /* Stateid was found, this is an OPEN upgrade */
+ status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
+ if (status)
goto out;
-
+ } else {
+ /* Stateid was not found, this is a new OPEN */
+ int flags = 0;
if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
flags = MAY_WRITE;
else
flags = MAY_READ;
- if ((status = nfsd_open(rqstp, current_fh, S_IFREG,
- flags,
- &stp->st_vfs_file)) != 0)
- goto out_free;
-
- vfsopen++;
-
- init_stateid(stp, fp, sop, open);
- stp->st_vfs_set = 1;
- } else {
- /* This is an upgrade of an existing OPEN.
- * OR the incoming share with the existing
- * nfs4_stateid share */
- unsigned int share_access;
-
- set_access(&share_access, stp->st_access_bmap);
- share_access = ~share_access;
- share_access &= open->op_share_access;
-
- /* update the struct file */
- if ((status = nfs4_file_upgrade(stp->st_vfs_file, share_access)))
- goto out;
- /* remember the open */
- set_bit(open->op_share_access, &stp->st_access_bmap);
- set_bit(open->op_share_deny, &stp->st_deny_bmap);
- /* bump the stateid */
- update_stateid(&stp->st_stateid);
- }
- dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n\n",
- stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
- stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
-
- if (open->op_truncate) {
- iattr.ia_valid = ATTR_SIZE;
- iattr.ia_size = 0;
- status = nfsd_setattr(rqstp, current_fh, &iattr, 0, (time_t)0);
- if (status)
+ 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;
+ }
+ }
}
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, &delegflag);
+ open->op_delegate_type = delegflag;
+
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))
release_file(fp);
- if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
- if (status)
- status = nfserr_reclaim_bad;
- else {
- /* successful reclaim. so_seqid is decremented because
- * it will be bumped in encode_open
- */
- open->op_stateowner->so_confirmed = 1;
- open->op_stateowner->so_seqid--;
- }
- }
+ /* CLAIM_PREVIOUS has different error returns */
+ nfs4_set_claim_prev(open, &status);
/*
* To finish the open response, we just need to set the rflags.
*/
- open->op_rflags = 0;
+ open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
if (!open->op_stateowner->so_confirmed)
open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
return status;
-out_free:
- kfree(stp);
- goto out;
}
static struct work_struct laundromat_work;
{
struct nfs4_client *clp;
struct nfs4_stateowner *sop;
+ struct nfs4_delegation *dp;
struct list_head *pos, *next;
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);
}
+ spin_lock(&recall_lock);
+ list_for_each_safe(pos, next, &del_recall_lru) {
+ dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
+ if (atomic_read(&dp->dl_state) == NFS4_RECALL_COMPLETE)
+ goto reap;
+ if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
+ u = dp->dl_time - cutoff;
+ if (test_val > u)
+ test_val = u;
+ break;
+ }
+reap:
+ dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
+ dp, dp->dl_flock);
+ release_delegation(dp);
+ }
+ spin_unlock(&recall_lock);
+ 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",
sop->so_id);
list_del(&sop->so_close_lru);
- free_stateowner(sop);
+ nfs4_put_stateowner(sop);
}
if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
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);
+}
+
+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 int
+nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
+{
+ int status = nfserr_openmode;
+
+ if ((flags & WR_STATE) & (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
+ goto out;
+ if ((flags & RD_STATE) & (dp->dl_type == NFS4_OPEN_DELEGATE_WRITE))
+ goto out;
+ status = nfs_ok;
+out:
+ return status;
+}
/*
* 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 nfs4_stateid *stp;
+ struct nfs4_stateid *stp = NULL;
+ struct nfs4_delegation *dp = NULL;
+ stateid_t *stidp;
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);
- *stpp = NULL;
-
/* STALE STATEID */
status = nfserr_stale_stateid;
if (STALE_STATEID(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 */
+ struct inode *ino = current_fh->fh_dentry->d_inode;
+
+ if(!(dp = find_delegation_stateid(ino, stateid))) {
+ dprintk("NFSD: delegation stateid not found\n");
+ 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");
+ 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);
+ } else if (dp) {
+ if ((status = nfs4_check_delegmode(dp, flags)))
+ goto out;
+ renew_client(dp->dl_client);
+ if (flags & DELEG_RET) {
+ atomic_set(&dp->dl_state,NFS4_RECALL_COMPLETE);
+ spin_lock(&recall_lock);
+ release_delegation(dp);
+ spin_unlock(&recall_lock);
+ }
}
- *stpp = stp;
status = nfs_ok;
- renew_client(stp->st_stateowner->so_client);
out:
return status;
}
clp->cl_first_state = get_seconds();
}
-/*
- * nfs4_unlock_state(); called in encode
- */
int
nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
{
if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
goto out;
- oc->oc_stateowner = NULL;
nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
status = nfs_ok;
first_state(sop->so_client);
out:
+ if (oc->oc_stateowner)
+ nfs4_get_stateowner(oc->oc_stateowner);
+ nfs4_unlock_state();
return status;
}
}
}
-/*
- * nfs4_unlock_state(); called in encode
- */
-
int
nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od)
{
(int)current_fh->fh_dentry->d_name.len,
current_fh->fh_dentry->d_name.name);
- od->od_stateowner = NULL;
- status = nfserr_inval;
if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
- goto out;
+ return nfserr_inval;
nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
status = nfs_ok;
out:
+ if (od->od_stateowner)
+ nfs4_get_stateowner(od->od_stateowner);
+ nfs4_unlock_state();
return status;
}
(int)current_fh->fh_dentry->d_name.len,
current_fh->fh_dentry->d_name.name);
- close->cl_stateowner = NULL;
nfs4_lock_state();
/* check close_lru for replay */
if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
/* release_state_owner() calls nfsd_close() if needed */
release_state_owner(stp, &close->cl_stateowner, OPEN_STATE);
+out:
+ if (close->cl_stateowner)
+ nfs4_get_stateowner(close->cl_stateowner);
+ nfs4_unlock_state();
+ 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);
+ nfs4_unlock_state();
out:
return status;
}
+
/*
* Lock owner state (byte-range locks)
*/
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;
+ unsigned int fi_hashval;
+
+ dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
+ stid->si_boot, stid->si_stateownerid,
+ stid->si_fileid, stid->si_generation);
+
+ if(!ino || !stid)
+ return NULL;
+ st_id = stid->si_stateownerid;
+ fi_hashval = file_hashval(ino);
+ if (find_file(fi_hashval, ino, &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
unsigned int hval = lockownerid_hashval(sop->so_id);
deny->ld_sop = NULL;
- if (nfs4_verify_lock_stateowner(sop, hval))
+ if (nfs4_verify_lock_stateowner(sop, hval)) {
+ kref_get(&sop->so_ref);
deny->ld_sop = sop;
+ deny->ld_clientid = sop->so_client->cl_clientid;
+ }
deny->ld_start = fl->fl_start;
deny->ld_length = ~(u64)0;
if (fl->fl_end != ~(u64)0)
/*
* LOCK operation
- *
- * nfs4_unlock_state(); called in encode
*/
int
nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock)
if (check_lock_length(lock->lk_offset, lock->lk_length))
return nfserr_inval;
- lock->lk_stateowner = NULL;
nfs4_lock_state();
if (lock->lk_is_new) {
if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner,
fp, open_stp)) == NULL) {
release_stateowner(lock->lk_stateowner);
+ lock->lk_stateowner = NULL;
goto out;
}
/* bump the open seqid used to create the lock */
release_state_owner(lock_stp, &lock->lk_stateowner, LOCK_STATE);
}
out:
+ if (lock->lk_stateowner)
+ nfs4_get_stateowner(lock->lk_stateowner);
+ nfs4_unlock_state();
return status;
}
if (check_lock_length(locku->lu_offset, locku->lu_length))
return nfserr_inval;
- locku->lu_stateowner = NULL;
nfs4_lock_state();
if ((status = nfs4_preprocess_seqid_op(current_fh,
memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
out:
+ if (locku->lu_stateowner)
+ nfs4_get_stateowner(locku->lu_stateowner);
+ nfs4_unlock_state();
return status;
out_nfserr:
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)
{
int i;
struct nfs4_client *clp = NULL;
+ struct nfs4_delegation *dp = NULL;
+ struct list_head *pos, *next;
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
while (!list_empty(&conf_id_hashtbl[i])) {
expire_client(clp);
}
}
+ spin_lock(&recall_lock);
+ list_for_each_safe(pos, next, &del_recall_lru) {
+ dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
+ atomic_set(&dp->dl_state, NFS4_RECALL_COMPLETE);
+ release_delegation(dp);
+ }
+ spin_unlock(&recall_lock);
+
release_all_files();
cancel_delayed_work(&laundromat_work);
flush_scheduled_work();
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
git://git.onelab.eu / linux-2.6.git / blobdiff