#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
+#include <linux/file.h>
#include <linux/mount.h>
#include <linux/workqueue.h>
#include <linux/smp_lock.h>
#include <linux/nfsd/state.h>
#include <linux/nfsd/xdr4.h>
#include <linux/namei.h>
+#include <linux/swap.h>
#include <linux/mutex.h>
+#include <linux/lockd/bind.h>
+#include <linux/module.h>
+#include <linux/sunrpc/svcauth_gss.h>
#define NFSDDBG_FACILITY NFSDDBG_PROC
static time_t lease_time = 90; /* default lease time */
static time_t user_lease_time = 90;
static time_t boot_time;
-static int in_grace = 1;
-static u32 current_clientid = 1;
static u32 current_ownerid = 1;
static u32 current_fileid = 1;
static u32 current_delegid = 1;
/* forward declarations */
static 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);
static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
static void nfs4_set_recdir(char *recdir);
*/
static DEFINE_MUTEX(client_mutex);
-static kmem_cache_t *stateowner_slab = NULL;
-static kmem_cache_t *file_slab = NULL;
-static kmem_cache_t *stateid_slab = NULL;
-static kmem_cache_t *deleg_slab = NULL;
+static struct kmem_cache *stateowner_slab = NULL;
+static struct kmem_cache *file_slab = NULL;
+static struct kmem_cache *stateid_slab = NULL;
+static struct kmem_cache *deleg_slab = NULL;
void
nfs4_lock_state(void)
return x;
}
-/* forward declarations */
-static void release_stateowner(struct nfs4_stateowner *sop);
-static void release_stateid(struct nfs4_stateid *stp, int flags);
-
/*
* Delegation state
*/
/* recall_lock protects the del_recall_lru */
-static spinlock_t recall_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(recall_lock);
static struct list_head del_recall_lru;
static void
kref_get(&fi->fi_ref);
}
+static int num_delegations;
+unsigned int max_delegations;
+
+/*
+ * Open owner state (share locks)
+ */
+
+/* hash tables for nfs4_stateowner */
+#define OWNER_HASH_BITS 8
+#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
+#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
+
+#define ownerid_hashval(id) \
+ ((id) & OWNER_HASH_MASK)
+#define ownerstr_hashval(clientid, ownername) \
+ (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
+
+static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
+static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
+
+/* hash table for nfs4_file */
+#define FILE_HASH_BITS 8
+#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
+#define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
+/* hash table for (open)nfs4_stateid */
+#define STATEID_HASH_BITS 10
+#define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
+#define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
+
+#define file_hashval(x) \
+ hash_ptr(x, FILE_HASH_BITS)
+#define stateid_hashval(owner_id, file_id) \
+ (((owner_id) + (file_id)) & STATEID_HASH_MASK)
+
+static struct list_head file_hashtbl[FILE_HASH_SIZE];
+static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
+
static struct nfs4_delegation *
alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
{
struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
dprintk("NFSD alloc_init_deleg\n");
+ if (fp->fi_had_conflict)
+ return NULL;
+ if (num_delegations > max_delegations)
+ return NULL;
dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
if (dp == NULL)
return dp;
+ num_delegations++;
INIT_LIST_HEAD(&dp->dl_perfile);
INIT_LIST_HEAD(&dp->dl_perclnt);
INIT_LIST_HEAD(&dp->dl_recall_lru);
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);
+ fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle);
dp->dl_time = 0;
atomic_set(&dp->dl_count, 1);
list_add(&dp->dl_perfile, &fp->fi_delegations);
dprintk("NFSD: freeing dp %p\n",dp);
put_nfs4_file(dp->dl_file);
kmem_cache_free(deleg_slab, dp);
+ num_delegations--;
}
}
/* 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);
+ vfs_setlease(filp, F_UNLCK, &dp->dl_flock);
nfsd_close(filp);
}
static struct list_head client_lru;
static struct list_head close_lru;
+static void unhash_generic_stateid(struct nfs4_stateid *stp)
+{
+ list_del(&stp->st_hash);
+ list_del(&stp->st_perfile);
+ list_del(&stp->st_perstateowner);
+}
+
+static void free_generic_stateid(struct nfs4_stateid *stp)
+{
+ put_nfs4_file(stp->st_file);
+ kmem_cache_free(stateid_slab, stp);
+}
+
+static void release_lock_stateid(struct nfs4_stateid *stp)
+{
+ unhash_generic_stateid(stp);
+ locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner);
+ free_generic_stateid(stp);
+}
+
+static void unhash_lockowner(struct nfs4_stateowner *sop)
+{
+ struct nfs4_stateid *stp;
+
+ list_del(&sop->so_idhash);
+ list_del(&sop->so_strhash);
+ list_del(&sop->so_perstateid);
+ while (!list_empty(&sop->so_stateids)) {
+ stp = list_first_entry(&sop->so_stateids,
+ struct nfs4_stateid, st_perstateowner);
+ release_lock_stateid(stp);
+ }
+}
+
+static void release_lockowner(struct nfs4_stateowner *sop)
+{
+ unhash_lockowner(sop);
+ nfs4_put_stateowner(sop);
+}
+
+static void
+release_stateid_lockowners(struct nfs4_stateid *open_stp)
+{
+ struct nfs4_stateowner *lock_sop;
+
+ while (!list_empty(&open_stp->st_lockowners)) {
+ lock_sop = list_entry(open_stp->st_lockowners.next,
+ struct nfs4_stateowner, so_perstateid);
+ /* list_del(&open_stp->st_lockowners); */
+ BUG_ON(lock_sop->so_is_open_owner);
+ release_lockowner(lock_sop);
+ }
+}
+
+static void release_open_stateid(struct nfs4_stateid *stp)
+{
+ unhash_generic_stateid(stp);
+ release_stateid_lockowners(stp);
+ nfsd_close(stp->st_vfs_file);
+ free_generic_stateid(stp);
+}
+
+static void unhash_openowner(struct nfs4_stateowner *sop)
+{
+ struct nfs4_stateid *stp;
+
+ list_del(&sop->so_idhash);
+ list_del(&sop->so_strhash);
+ list_del(&sop->so_perclient);
+ list_del(&sop->so_perstateid); /* XXX: necessary? */
+ while (!list_empty(&sop->so_stateids)) {
+ stp = list_first_entry(&sop->so_stateids,
+ struct nfs4_stateid, st_perstateowner);
+ release_open_stateid(stp);
+ }
+}
+
+static void release_openowner(struct nfs4_stateowner *sop)
+{
+ unhash_openowner(sop);
+ list_del(&sop->so_close_lru);
+ nfs4_put_stateowner(sop);
+}
+
static inline void
renew_client(struct nfs4_client *clp)
{
* This type of memory management is somewhat inefficient, but we use it
* anyway since SETCLIENTID is not a common operation.
*/
-static inline struct nfs4_client *
-alloc_client(struct xdr_netobj name)
+static struct nfs4_client *alloc_client(struct xdr_netobj name)
{
struct nfs4_client *clp;
- if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
- memset(clp, 0, sizeof(*clp));
- if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
- memcpy(clp->cl_name.data, name.data, name.len);
- clp->cl_name.len = name.len;
- }
- else {
- kfree(clp);
- clp = NULL;
- }
+ clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
+ if (clp == NULL)
+ return NULL;
+ clp->cl_name.data = kmalloc(name.len, GFP_KERNEL);
+ if (clp->cl_name.data == NULL) {
+ kfree(clp);
+ return NULL;
}
+ memcpy(clp->cl_name.data, name.data, name.len);
+ clp->cl_name.len = name.len;
return clp;
}
+static void
+shutdown_callback_client(struct nfs4_client *clp)
+{
+ struct rpc_clnt *clnt = clp->cl_callback.cb_client;
+
+ if (clnt) {
+ /*
+ * Callback threads take a reference on the client, so there
+ * should be no outstanding callbacks at this point.
+ */
+ clp->cl_callback.cb_client = NULL;
+ rpc_shutdown_client(clnt);
+ }
+}
+
static inline void
free_client(struct nfs4_client *clp)
{
+ shutdown_callback_client(clp);
if (clp->cl_cred.cr_group_info)
put_group_info(clp->cl_cred.cr_group_info);
+ kfree(clp->cl_principal);
kfree(clp->cl_name.data);
kfree(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 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_delegations)) {
list_del(&clp->cl_lru);
while (!list_empty(&clp->cl_openowners)) {
sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient);
- release_stateowner(sop);
+ release_openowner(sop);
}
put_nfs4_client(clp);
}
-static struct nfs4_client *
-create_client(struct xdr_netobj name, char *recdir) {
+static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir)
+{
struct nfs4_client *clp;
- if (!(clp = alloc_client(name)))
- goto out;
+ clp = alloc_client(name);
+ if (clp == NULL)
+ return NULL;
memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
atomic_set(&clp->cl_count, 1);
atomic_set(&clp->cl_callback.cb_set, 0);
INIT_LIST_HEAD(&clp->cl_openowners);
INIT_LIST_HEAD(&clp->cl_delegations);
INIT_LIST_HEAD(&clp->cl_lru);
-out:
return clp;
}
-static void
-copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
- memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
+static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
+{
+ memcpy(target->cl_verifier.data, source->data,
+ sizeof(target->cl_verifier.data));
}
-static void
-copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
+static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
+{
target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
target->cl_clientid.cl_id = source->cl_clientid.cl_id;
}
-static void
-copy_cred(struct svc_cred *target, struct svc_cred *source) {
-
+static void copy_cred(struct svc_cred *target, struct svc_cred *source)
+{
target->cr_uid = source->cr_uid;
target->cr_gid = source->cr_gid;
target->cr_group_info = source->cr_group_info;
get_group_info(target->cr_group_info);
}
-static inline int
-same_name(const char *n1, const char *n2) {
+static int same_name(const char *n1, const char *n2)
+{
return 0 == memcmp(n1, n2, HEXDIR_LEN);
}
static int
-cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
- return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
+same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
+{
+ return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
}
static int
-cmp_clid(clientid_t * cl1, clientid_t * cl2) {
- return((cl1->cl_boot == cl2->cl_boot) &&
- (cl1->cl_id == cl2->cl_id));
+same_clid(clientid_t *cl1, clientid_t *cl2)
+{
+ return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
}
/* XXX what about NGROUP */
static int
-cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
- return(cr1->cr_uid == cr2->cr_uid);
-
+same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
+{
+ return cr1->cr_uid == cr2->cr_uid;
}
-static void
-gen_clid(struct nfs4_client *clp) {
+static void gen_clid(struct nfs4_client *clp)
+{
+ static u32 current_clientid = 1;
+
clp->cl_clientid.cl_boot = boot_time;
clp->cl_clientid.cl_id = current_clientid++;
}
-static void
-gen_confirm(struct nfs4_client *clp) {
- struct timespec tv;
- u32 * p;
+static void gen_confirm(struct nfs4_client *clp)
+{
+ static u32 i;
+ u32 *p;
- tv = CURRENT_TIME;
p = (u32 *)clp->cl_confirm.data;
- *p++ = tv.tv_sec;
- *p++ = tv.tv_nsec;
+ *p++ = get_seconds();
+ *p++ = i++;
}
-static int
-check_name(struct xdr_netobj name) {
-
+static int check_name(struct xdr_netobj name)
+{
if (name.len == 0)
return 0;
if (name.len > NFS4_OPAQUE_LIMIT) {
- printk("NFSD: check_name: name too long(%d)!\n", name.len);
+ dprintk("NFSD: check_name: name too long(%d)!\n", name.len);
return 0;
}
return 1;
dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
list_del_init(&clp->cl_strhash);
- list_del_init(&clp->cl_idhash);
- list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
+ list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
strhashval = clientstr_hashval(clp->cl_recdir);
list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
renew_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))
+ if (same_clid(&clp->cl_clientid, clid))
return clp;
}
return NULL;
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))
+ if (same_clid(&clp->cl_clientid, clid))
return clp;
}
return NULL;
return;
}
-/*
- * RFC 3010 has a complex implmentation description of processing a
- * SETCLIENTID request consisting of 5 bullets, labeled as
- * CASE0 - CASE4 below.
- *
- * NOTES:
- * callback information will be processed in a future patch
- *
- * an unconfirmed record is added when:
- * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
- * CASE 1: confirmed record found with matching name, principal,
- * verifier, and clientid.
- * CASE 2: confirmed record found with matching name, principal,
- * and there is no unconfirmed record with matching
- * name and principal
- *
- * an unconfirmed record is replaced when:
- * CASE 3: confirmed record found with matching name, principal,
- * and an unconfirmed record is found with matching
- * name, principal, and with clientid and
- * confirm that does not match the confirmed record.
- * CASE 4: there is no confirmed record with matching name and
- * principal. there is an unconfirmed record with
- * matching name, principal.
- *
- * an unconfirmed record is deleted when:
- * CASE 1: an unconfirmed record that matches input name, verifier,
- * and confirmed clientid.
- * CASE 4: any unconfirmed records with matching name and principal
- * that exist after an unconfirmed record has been replaced
- * as described above.
- *
- */
-int
-nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
+__be32
+nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_setclientid *setclid)
{
- u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
+ struct sockaddr_in *sin = svc_addr_in(rqstp);
struct xdr_netobj clname = {
.len = setclid->se_namelen,
.data = setclid->se_name,
nfs4_verifier clverifier = setclid->se_verf;
unsigned int strhashval;
struct nfs4_client *conf, *unconf, *new;
- int status;
+ __be32 status;
+ char *princ;
char dname[HEXDIR_LEN];
if (!check_name(clname))
nfs4_lock_state();
conf = find_confirmed_client_by_str(dname, strhashval);
if (conf) {
- /*
- * CASE 0:
- * clname match, confirmed, different principal
- * or different ip_address
- */
+ /* RFC 3530 14.2.33 CASE 0: */
status = nfserr_clid_inuse;
- if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred)
- || conf->cl_addr != ip_addr) {
- printk("NFSD: setclientid: string in use by client"
- "(clientid %08x/%08x)\n",
- conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id);
+ if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)
+ || conf->cl_addr != sin->sin_addr.s_addr) {
+ dprintk("NFSD: setclientid: string in use by clientat %pI4\n",
+ &conf->cl_addr);
goto out;
}
}
+ /*
+ * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
+ * has a description of SETCLIENTID request processing consisting
+ * of 5 bullet points, labeled as CASE0 - CASE4 below.
+ */
unconf = find_unconfirmed_client_by_str(dname, strhashval);
status = nfserr_resource;
if (!conf) {
- /*
- * CASE 4:
- * placed first, because it is the normal case.
+ /*
+ * RFC 3530 14.2.33 CASE 4:
+ * placed first, because it is the normal case
*/
if (unconf)
expire_client(unconf);
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new, &clverifier);
- new->cl_addr = ip_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new, strhashval);
- } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
+ } else if (same_verf(&conf->cl_verifier, &clverifier)) {
/*
- * CASE 1:
- * cl_name match, confirmed, principal match
- * verifier match: probable callback update
- *
- * remove any unconfirmed nfs4_client with
- * matching cl_name, cl_verifier, and cl_clientid
- *
- * create and insert an unconfirmed nfs4_client with same
- * cl_name, cl_verifier, and cl_clientid as existing
- * nfs4_client, but with the new callback info and a
- * new cl_confirm
+ * RFC 3530 14.2.33 CASE 1:
+ * probable callback update
*/
if (unconf) {
/* Note this is removing unconfirmed {*x***},
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new,&conf->cl_verifier);
- new->cl_addr = ip_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
copy_clid(new, conf);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new,strhashval);
} else if (!unconf) {
/*
- * CASE 2:
- * clname match, confirmed, principal match
- * verfier does not match
- * no unconfirmed. create a new unconfirmed nfs4_client
- * using input clverifier, clname, and callback info
- * and generate a new cl_clientid and cl_confirm.
+ * RFC 3530 14.2.33 CASE 2:
+ * probable client reboot; state will be removed if
+ * confirmed.
*/
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new,&clverifier);
- new->cl_addr = ip_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new, strhashval);
- } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
- /*
- * CASE3:
- * confirmed found (name, principal match)
- * confirmed verifier does not match input clverifier
- *
- * unconfirmed found (name match)
- * confirmed->cl_confirm != unconfirmed->cl_confirm
- *
- * remove unconfirmed.
- *
- * create an unconfirmed nfs4_client
- * with same cl_name as existing confirmed nfs4_client,
- * but with new callback info, new cl_clientid,
- * new cl_verifier and a new cl_confirm
+ } else {
+ /*
+ * RFC 3530 14.2.33 CASE 3:
+ * probable client reboot; state will be removed if
+ * confirmed.
*/
expire_client(unconf);
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new,&clverifier);
- new->cl_addr = ip_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new, strhashval);
- } else {
- /* No cases hit !!! */
- status = nfserr_inval;
- goto out;
-
}
+ copy_verf(new, &clverifier);
+ new->cl_addr = sin->sin_addr.s_addr;
+ new->cl_flavor = rqstp->rq_flavor;
+ princ = svc_gss_principal(rqstp);
+ if (princ) {
+ new->cl_principal = kstrdup(princ, GFP_KERNEL);
+ if (new->cl_principal == NULL) {
+ free_client(new);
+ goto out;
+ }
+ }
+ copy_cred(&new->cl_cred, &rqstp->rq_cred);
+ gen_confirm(new);
+ gen_callback(new, setclid);
+ add_to_unconfirmed(new, strhashval);
setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
/*
- * RFC 3010 has a complex implmentation description of processing a
- * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
- * processing on a DRC miss, labeled as CASE1 - CASE4 below.
- *
- * NOTE: callback information will be processed here in a future patch
+ * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
+ * a description of SETCLIENTID_CONFIRM request processing consisting of 4
+ * bullets, labeled as CASE1 - CASE4 below.
*/
-int
-nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
+__be32
+nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_setclientid_confirm *setclientid_confirm)
{
- u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
+ struct sockaddr_in *sin = svc_addr_in(rqstp);
struct nfs4_client *conf, *unconf;
nfs4_verifier confirm = setclientid_confirm->sc_confirm;
clientid_t * clid = &setclientid_confirm->sc_clientid;
- int status;
+ __be32 status;
if (STALE_CLIENTID(clid))
return nfserr_stale_clientid;
unconf = find_unconfirmed_client(clid);
status = nfserr_clid_inuse;
- if (conf && conf->cl_addr != ip_addr)
+ if (conf && conf->cl_addr != sin->sin_addr.s_addr)
goto out;
- if (unconf && unconf->cl_addr != ip_addr)
+ if (unconf && unconf->cl_addr != sin->sin_addr.s_addr)
goto out;
- if ((conf && unconf) &&
- (cmp_verf(&unconf->cl_confirm, &confirm)) &&
- (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
- (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
- (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
- /* CASE 1:
- * unconf record that matches input clientid and input confirm.
- * conf record that matches input clientid.
- * conf and unconf records match names, verifiers
- */
- if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
+ /*
+ * section 14.2.34 of RFC 3530 has a description of
+ * SETCLIENTID_CONFIRM request processing consisting
+ * of 4 bullet points, labeled as CASE1 - CASE4 below.
+ */
+ if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) {
+ /*
+ * RFC 3530 14.2.34 CASE 1:
+ * callback update
+ */
+ if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
status = nfserr_clid_inuse;
else {
/* XXX: We just turn off callbacks until we can handle
status = nfs_ok;
}
- } else if ((conf && !unconf) ||
- ((conf && unconf) &&
- (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
- !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
- /* CASE 2:
- * conf record that matches input clientid.
- * if unconf record matches input clientid, then
- * unconf->cl_name or unconf->cl_verifier don't match the
- * conf record.
+ } else if (conf && !unconf) {
+ /*
+ * RFC 3530 14.2.34 CASE 2:
+ * probable retransmitted request; play it safe and
+ * do nothing.
*/
- if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred))
+ if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
status = nfserr_clid_inuse;
else
status = nfs_ok;
} else if (!conf && unconf
- && cmp_verf(&unconf->cl_confirm, &confirm)) {
- /* CASE 3:
- * conf record not found.
- * unconf record found.
- * unconf->cl_confirm matches input confirm
+ && same_verf(&unconf->cl_confirm, &confirm)) {
+ /*
+ * RFC 3530 14.2.34 CASE 3:
+ * Normal case; new or rebooted client:
*/
- if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
+ if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
status = nfserr_clid_inuse;
} else {
unsigned int hash =
}
move_to_confirmed(unconf);
conf = unconf;
+ nfsd4_probe_callback(conf);
status = nfs_ok;
}
- } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm)))
- && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm,
+ } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
+ && (!unconf || (unconf && !same_verf(&unconf->cl_confirm,
&confirm)))) {
- /* CASE 4:
- * conf record not found, or if conf, conf->cl_confirm does not
- * match input confirm.
- * unconf record not found, or if unconf, unconf->cl_confirm
- * does not match input confirm.
+ /*
+ * RFC 3530 14.2.34 CASE 4:
+ * Client probably hasn't noticed that we rebooted yet.
*/
status = nfserr_stale_clientid;
} else {
status = nfserr_clid_inuse;
}
out:
- if (!status)
- nfsd4_probe_callback(conf);
nfs4_unlock_state();
return status;
}
-/*
- * Open owner state (share locks)
- */
-
-/* hash tables for nfs4_stateowner */
-#define OWNER_HASH_BITS 8
-#define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
-#define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
-
-#define ownerid_hashval(id) \
- ((id) & OWNER_HASH_MASK)
-#define ownerstr_hashval(clientid, ownername) \
- (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
-
-static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
-static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
-
-/* hash table for nfs4_file */
-#define FILE_HASH_BITS 8
-#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
-#define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
-/* hash table for (open)nfs4_stateid */
-#define STATEID_HASH_BITS 10
-#define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
-#define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
-
-#define file_hashval(x) \
- hash_ptr(x, FILE_HASH_BITS)
-#define stateid_hashval(owner_id, file_id) \
- (((owner_id) + (file_id)) & STATEID_HASH_MASK)
-
-static struct list_head file_hashtbl[FILE_HASH_SIZE];
-static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
-
/* OPEN Share state helper functions */
static inline struct nfs4_file *
alloc_init_file(struct inode *ino)
list_add(&fp->fi_hash, &file_hashtbl[hashval]);
fp->fi_inode = igrab(ino);
fp->fi_id = current_fileid++;
+ fp->fi_had_conflict = false;
return fp;
}
return NULL;
}
static void
-nfsd4_free_slab(kmem_cache_t **slab)
+nfsd4_free_slab(struct kmem_cache **slab)
{
- int status;
-
if (*slab == NULL)
return;
- status = kmem_cache_destroy(*slab);
+ kmem_cache_destroy(*slab);
*slab = NULL;
- WARN_ON(status);
}
-static void
+void
nfsd4_free_slabs(void)
{
nfsd4_free_slab(&stateowner_slab);
nfsd4_init_slabs(void)
{
stateowner_slab = kmem_cache_create("nfsd4_stateowners",
- sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
+ sizeof(struct nfs4_stateowner), 0, 0, NULL);
if (stateowner_slab == NULL)
goto out_nomem;
file_slab = kmem_cache_create("nfsd4_files",
- sizeof(struct nfs4_file), 0, 0, NULL, NULL);
+ sizeof(struct nfs4_file), 0, 0, NULL);
if (file_slab == NULL)
goto out_nomem;
stateid_slab = kmem_cache_create("nfsd4_stateids",
- sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
+ sizeof(struct nfs4_stateid), 0, 0, NULL);
if (stateid_slab == NULL)
goto out_nomem;
deleg_slab = kmem_cache_create("nfsd4_delegations",
- sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
+ sizeof(struct nfs4_delegation), 0, 0, NULL);
if (deleg_slab == NULL)
goto out_nomem;
return 0;
return sop;
}
-static void
-release_stateid_lockowners(struct nfs4_stateid *open_stp)
-{
- struct nfs4_stateowner *lock_sop;
-
- while (!list_empty(&open_stp->st_lockowners)) {
- lock_sop = list_entry(open_stp->st_lockowners.next,
- struct nfs4_stateowner, so_perstateid);
- /* list_del(&open_stp->st_lockowners); */
- BUG_ON(lock_sop->so_is_open_owner);
- release_stateowner(lock_sop);
- }
-}
-
-static void
-unhash_stateowner(struct nfs4_stateowner *sop)
-{
- struct nfs4_stateid *stp;
-
- list_del(&sop->so_idhash);
- list_del(&sop->so_strhash);
- if (sop->so_is_open_owner)
- list_del(&sop->so_perclient);
- list_del(&sop->so_perstateid);
- while (!list_empty(&sop->so_stateids)) {
- stp = list_entry(sop->so_stateids.next,
- struct nfs4_stateid, st_perstateowner);
- if (sop->so_is_open_owner)
- release_stateid(stp, OPEN_STATE);
- else
- release_stateid(stp, LOCK_STATE);
- }
-}
-
-static void
-release_stateowner(struct nfs4_stateowner *sop)
-{
- unhash_stateowner(sop);
- list_del(&sop->so_close_lru);
- nfs4_put_stateowner(sop);
-}
-
static inline void
init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
struct nfs4_stateowner *sop = open->op_stateowner;
}
static void
-release_stateid(struct nfs4_stateid *stp, int flags)
-{
- struct file *filp = stp->st_vfs_file;
-
- list_del(&stp->st_hash);
- list_del(&stp->st_perfile);
- list_del(&stp->st_perstateowner);
- if (flags & OPEN_STATE) {
- release_stateid_lockowners(stp);
- stp->st_vfs_file = NULL;
- nfsd_close(filp);
- } else if (flags & LOCK_STATE)
- locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
- put_nfs4_file(stp->st_file);
- kmem_cache_free(stateid_slab, stp);
-}
-
-static void
move_to_close_lru(struct nfs4_stateowner *sop)
{
dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
- unhash_stateowner(sop);
- list_add_tail(&sop->so_close_lru, &close_lru);
+ list_move_tail(&sop->so_close_lru, &close_lru);
sop->so_time = get_seconds();
}
static int
-cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
- return ((sop->so_owner.len == owner->len) &&
- !memcmp(sop->so_owner.data, owner->data, owner->len) &&
- (sop->so_client->cl_clientid.cl_id == clid->cl_id));
+same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
+ clientid_t *clid)
+{
+ return (sop->so_owner.len == owner->len) &&
+ 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
+ (sop->so_client->cl_clientid.cl_id == clid->cl_id);
}
static struct nfs4_stateowner *
struct nfs4_stateowner *so = NULL;
list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
- if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
+ if (same_owner_str(so, &open->op_owner, &open->op_clientid))
return so;
}
return NULL;
return NULL;
}
-#define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
-#define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
+static inline int access_valid(u32 x)
+{
+ if (x < NFS4_SHARE_ACCESS_READ)
+ return 0;
+ if (x > NFS4_SHARE_ACCESS_BOTH)
+ return 0;
+ return 1;
+}
+
+static inline int deny_valid(u32 x)
+{
+ /* Note: unlike access bits, deny bits may be zero. */
+ 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;
* Called to check deny when READ with all zero stateid or
* WRITE with all zero or all one stateid
*/
-static int
+static __be32
nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
{
struct inode *ino = current_fh->fh_dentry->d_inode;
struct nfs4_file *fp;
struct nfs4_stateid *stp;
- int ret;
+ __be32 ret;
dprintk("NFSD: nfs4_share_conflict\n");
nfs4_file_downgrade(struct file *filp, unsigned int share_access)
{
if (share_access & NFS4_SHARE_ACCESS_WRITE) {
- put_write_access(filp->f_dentry->d_inode);
+ drop_file_write_access(filp);
filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
}
}
{
struct nfs4_delegation *dp = __dp;
- daemonize("nfsv4-recall");
-
+ dp->dl_file->fi_had_conflict = true;
nfsd4_cb_recall(dp);
return 0;
}
* 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);
/* 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;
+ /*
+ * We don't want the locks code to timeout the lease for us;
+ * we'll remove it ourself if the delegation isn't returned
+ * in time.
+ */
+ fl->fl_break_time = 0;
t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
if (IS_ERR(t)) {
printk(KERN_INFO "NFSD: Callback thread failed for "
"for client (clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
+ put_nfs4_client(dp->dl_client);
nfs4_put_delegation(dp);
}
}
/*
* Set the delegation file_lock back pointer.
*
- * Called from __setlease() with lock_kernel() held.
+ * Called from setlease() with lock_kernel() held.
*/
static
void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
}
/*
- * Called from __setlease() with lock_kernel() held
+ * Called from setlease() with lock_kernel() held
*/
static
int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
};
-int
+__be32
nfsd4_process_open1(struct nfsd4_open *open)
{
clientid_t *clientid = &open->op_clientid;
if (!sop->so_confirmed) {
/* Replace unconfirmed owners without checking for replay. */
clp = sop->so_client;
- release_stateowner(sop);
+ release_openowner(sop);
open->op_stateowner = NULL;
goto renew;
}
if (open->op_seqid == sop->so_seqid - 1) {
if (sop->so_replay.rp_buflen)
- return NFSERR_REPLAY_ME;
+ return nfserr_replay_me;
/* The original OPEN failed so spectacularly
* that we don't even have replay data saved!
* Therefore, we have no choice but to continue
return nfs_ok;
}
-static inline int
+static inline __be32
nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
{
if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
return NULL;
}
-static int
+static __be32
nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
struct nfs4_delegation **dp)
{
int flags;
- int status = nfserr_bad_stateid;
+ __be32 status = nfserr_bad_stateid;
*dp = find_delegation_file(fp, &open->op_delegate_stateid);
if (*dp == NULL)
return nfs_ok;
}
-static int
+static __be32
nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
{
struct nfs4_stateid *local;
- int status = nfserr_share_denied;
+ __be32 status = nfserr_share_denied;
struct nfs4_stateowner *sop = open->op_stateowner;
list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
}
-static int
+static __be32
nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
struct nfs4_delegation *dp,
struct svc_fh *cur_fh, int flags)
get_file(dp->dl_vfs_file);
stp->st_vfs_file = dp->dl_vfs_file;
} else {
- int status;
+ __be32 status;
status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
&stp->st_vfs_file);
if (status) {
return 0;
}
-static inline int
+static inline __be32
nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
struct nfsd4_open *open)
{
return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
}
-static int
+static __be32
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;
+ struct inode *inode = filp->f_path.dentry->d_inode;
unsigned int share_access, new_writer;
- int status;
+ __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) {
- status = get_write_access(inode);
- if (status)
- return nfserrno(status);
+ 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);
}
status = nfsd4_truncate(rqstp, cur_fh, open);
if (status) {
}
/* remember the open */
filp->f_mode |= open->op_share_access;
- set_bit(open->op_share_access, &stp->st_access_bmap);
- set_bit(open->op_share_deny, &stp->st_deny_bmap);
+ __set_bit(open->op_share_access, &stp->st_access_bmap);
+ __set_bit(open->op_share_deny, &stp->st_deny_bmap);
return nfs_ok;
}
case NFS4_OPEN_CLAIM_NULL:
/* Let's not give out any delegations till everyone's
* had the chance to reclaim theirs.... */
- if (nfs4_in_grace())
+ if (locks_in_grace())
goto out;
if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
goto out;
locks_init_lock(&fl);
fl.fl_lmops = &nfsd_lease_mng_ops;
fl.fl_flags = FL_LEASE;
+ 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_pid = current->tgid;
- /* setlease checks to see if delegation should be handed out.
+ /* vfs_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))) {
+ if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) {
dprintk("NFSD: setlease failed [%d], no delegation\n", status);
unhash_delegation(dp);
flag = NFS4_OPEN_DELEGATE_NONE;
if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
&& flag == NFS4_OPEN_DELEGATE_NONE
&& open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
- printk("NFSD: WARNING: refusing delegation reclaim\n");
+ dprintk("NFSD: WARNING: refusing delegation reclaim\n");
open->op_delegate_type = flag;
}
/*
* called with nfs4_lock_state() held.
*/
-int
+__be32
nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
{
struct nfs4_file *fp = NULL;
struct inode *ino = current_fh->fh_dentry->d_inode;
struct nfs4_stateid *stp = NULL;
struct nfs4_delegation *dp = NULL;
- int status;
+ __be32 status;
status = nfserr_inval;
- if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
+ if (!access_valid(open->op_share_access)
+ || !deny_valid(open->op_share_deny))
goto out;
/*
* Lookup file; if found, lookup stateid and check open request,
} 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 = MAY_WRITE;
- else
- flags = MAY_READ;
+ flags |= NFSD_MAY_WRITE;
status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
if (status)
goto out;
init_stateid(stp, fp, open);
status = nfsd4_truncate(rqstp, current_fh, open);
if (status) {
- release_stateid(stp, OPEN_STATE);
+ release_open_stateid(stp);
goto out;
}
}
return status;
}
-static struct workqueue_struct *laundry_wq;
-static struct work_struct laundromat_work;
-static void laundromat_main(void *);
-static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
-
-int
-nfsd4_renew(clientid_t *clid)
+__be32
+nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ clientid_t *clid)
{
struct nfs4_client *clp;
- int status;
+ __be32 status;
nfs4_lock_state();
dprintk("process_renew(%08x/%08x): starting\n",
return status;
}
+struct lock_manager nfsd4_manager = {
+};
+
static void
-end_grace(void)
+nfsd4_end_grace(void)
{
dprintk("NFSD: end of grace period\n");
nfsd4_recdir_purge_old();
- in_grace = 0;
+ locks_end_grace(&nfsd4_manager);
}
static time_t
nfs4_lock_state();
dprintk("NFSD: laundromat service - starting\n");
- if (in_grace)
- end_grace();
+ if (locks_in_grace())
+ nfsd4_end_grace();
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)) {
}
dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
sop->so_id);
- list_del(&sop->so_close_lru);
- nfs4_put_stateowner(sop);
+ release_openowner(sop);
}
if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
return clientid_val;
}
-void
-laundromat_main(void *not_used)
+static struct workqueue_struct *laundry_wq;
+static void laundromat_main(struct work_struct *);
+static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
+
+static void
+laundromat_main(struct work_struct *not_used)
{
time_t t;
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_dentry->d_inode;
+ return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode;
}
static int
}
static
-int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
+__be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
{
- int status = nfserr_openmode;
+ __be32 status = nfserr_openmode;
if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
goto out;
return status;
}
-static inline int
+static inline __be32
check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
{
/* Trying to call delegreturn with a special stateid? Yuch: */
return nfserr_bad_stateid;
else if (ONE_STATEID(stateid) && (flags & RD_STATE))
return nfs_ok;
- else if (nfs4_in_grace()) {
+ else if (locks_in_grace()) {
/* Answer in remaining cases depends on existance of
* conflicting state; so we must wait out the grace period. */
return nfserr_grace;
static inline int
io_during_grace_disallowed(struct inode *inode, int flags)
{
- return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
- && MANDATORY_LOCK(inode);
+ return locks_in_grace() && (flags & (RD_STATE | WR_STATE))
+ && mandatory_lock(inode);
+}
+
+static int check_stateid_generation(stateid_t *in, stateid_t *ref)
+{
+ /* If the client sends us a stateid from the future, it's buggy: */
+ if (in->si_generation > ref->si_generation)
+ return nfserr_bad_stateid;
+ /*
+ * The following, however, can happen. For example, if the
+ * client sends an open and some IO at the same time, the open
+ * may bump si_generation while the IO is still in flight.
+ * Thanks to hard links and renames, the client never knows what
+ * file an open will affect. So it could avoid that situation
+ * only by serializing all opens and IO from the same open
+ * owner. To recover from the old_stateid error, the client
+ * will just have to retry the IO:
+ */
+ if (in->si_generation < ref->si_generation)
+ return nfserr_old_stateid;
+ return nfs_ok;
+}
+
+static int is_delegation_stateid(stateid_t *stateid)
+{
+ return stateid->si_fileid == 0;
}
/*
* Checks for stateid operations
*/
-int
+__be32
nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
{
struct nfs4_stateid *stp = NULL;
struct nfs4_delegation *dp = NULL;
- stateid_t *stidp;
struct inode *ino = current_fh->fh_dentry->d_inode;
- int status;
+ __be32 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;
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
return check_special_stateids(current_fh, stateid, flags);
- /* STALE STATEID */
status = nfserr_stale_stateid;
if (STALE_STATEID(stateid))
goto out;
- /* BAD STATEID */
status = nfserr_bad_stateid;
- 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;
+ if (is_delegation_stateid(stateid)) {
+ dp = find_delegation_stateid(ino, stateid);
+ if (!dp)
goto out;
- }
- stidp = &dp->dl_stateid;
+ status = check_stateid_generation(stateid, &dp->dl_stateid);
+ if (status)
+ goto out;
+ status = nfs4_check_delegmode(dp, flags);
+ if (status)
+ goto out;
+ renew_client(dp->dl_client);
+ if (flags & DELEG_RET)
+ unhash_delegation(dp);
+ if (filpp)
+ *filpp = dp->dl_vfs_file;
} 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;
+ stp = find_stateid(stateid, flags);
+ if (!stp)
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 > stidp->si_generation)
- goto out;
-
- /* OLD STATEID */
- status = nfserr_old_stateid;
- if (stateid->si_generation < stidp->si_generation)
- goto out;
- if (stp) {
- if ((status = nfs4_check_openmode(stp,flags)))
+ status = check_stateid_generation(stateid, &stp->st_stateid);
+ if (status)
+ goto out;
+ status = nfs4_check_openmode(stp, flags);
+ if (status)
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;
}
status = nfs_ok;
out:
/*
* Checks for sequence id mutating operations.
*/
-static int
+static __be32
nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock)
{
struct nfs4_stateid *stp;
struct nfs4_stateowner *sop;
+ __be32 status;
dprintk("NFSD: preprocess_seqid_op: seqid=%d "
"stateid = (%08x/%08x/%08x/%08x)\n", seqid,
*sopp = NULL;
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
- printk("NFSD: preprocess_seqid_op: magic stateid!\n");
+ dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
return nfserr_bad_stateid;
}
goto check_replay;
}
+ *stpp = stp;
+ *sopp = sop = stp->st_stateowner;
+
if (lock) {
- struct nfs4_stateowner *sop = stp->st_stateowner;
clientid_t *lockclid = &lock->v.new.clientid;
struct nfs4_client *clp = sop->so_client;
int lkflg = 0;
- int status;
+ __be32 status;
lkflg = setlkflg(lock->lk_type);
if (lock->lk_is_new) {
- if (!sop->so_is_open_owner)
+ if (!sop->so_is_open_owner)
+ return nfserr_bad_stateid;
+ if (!same_clid(&clp->cl_clientid, lockclid))
return nfserr_bad_stateid;
- if (!cmp_clid(&clp->cl_clientid, lockclid))
- return nfserr_bad_stateid;
- /* stp is the open stateid */
- status = nfs4_check_openmode(stp, lkflg);
- if (status)
- return status;
- } else {
- /* stp is the lock stateid */
- status = nfs4_check_openmode(stp->st_openstp, lkflg);
- if (status)
- return status;
+ /* stp is the open stateid */
+ status = nfs4_check_openmode(stp, lkflg);
+ if (status)
+ return status;
+ } else {
+ /* stp is the lock stateid */
+ status = nfs4_check_openmode(stp->st_openstp, lkflg);
+ if (status)
+ return status;
}
-
}
- if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
- printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
+ if (nfs4_check_fh(current_fh, stp)) {
+ dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
return nfserr_bad_stateid;
}
- *stpp = stp;
- *sopp = sop = stp->st_stateowner;
-
/*
* We now validate the seqid and stateid generation numbers.
* For the moment, we ignore the possibility of
goto check_replay;
if (sop->so_confirmed && flags & CONFIRM) {
- printk("NFSD: preprocess_seqid_op: expected"
+ dprintk("NFSD: preprocess_seqid_op: expected"
" unconfirmed stateowner!\n");
return nfserr_bad_stateid;
}
if (!sop->so_confirmed && !(flags & CONFIRM)) {
- printk("NFSD: preprocess_seqid_op: stateowner not"
+ dprintk("NFSD: preprocess_seqid_op: stateowner not"
" confirmed yet!\n");
return nfserr_bad_stateid;
}
- if (stateid->si_generation > stp->st_stateid.si_generation) {
- printk("NFSD: preprocess_seqid_op: future stateid?!\n");
- return nfserr_bad_stateid;
- }
-
- if (stateid->si_generation < stp->st_stateid.si_generation) {
- printk("NFSD: preprocess_seqid_op: old stateid!\n");
- return nfserr_old_stateid;
- }
+ status = check_stateid_generation(stateid, &stp->st_stateid);
+ if (status)
+ return status;
renew_client(sop->so_client);
return nfs_ok;
if (seqid == sop->so_seqid - 1) {
dprintk("NFSD: preprocess_seqid_op: retransmission?\n");
/* indicate replay to calling function */
- return NFSERR_REPLAY_ME;
+ return nfserr_replay_me;
}
- printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
+ dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n",
sop->so_seqid, seqid);
*sopp = NULL;
return nfserr_bad_seqid;
}
-int
-nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc, struct nfs4_stateowner **replay_owner)
+__be32
+nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_open_confirm *oc)
{
- int status;
+ __be32 status;
struct nfs4_stateowner *sop;
struct nfs4_stateid *stp;
dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
- (int)current_fh->fh_dentry->d_name.len,
- current_fh->fh_dentry->d_name.name);
+ (int)cstate->current_fh.fh_dentry->d_name.len,
+ cstate->current_fh.fh_dentry->d_name.name);
- if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
- goto out;
+ status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
+ if (status)
+ return status;
nfs4_lock_state();
- if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
- &oc->oc_req_stateid,
- CHECK_FH | CONFIRM | OPEN_STATE,
+ if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
+ oc->oc_seqid, &oc->oc_req_stateid,
+ CONFIRM | OPEN_STATE,
&oc->oc_stateowner, &stp, NULL)))
goto out;
out:
if (oc->oc_stateowner) {
nfs4_get_stateowner(oc->oc_stateowner);
- *replay_owner = oc->oc_stateowner;
+ cstate->replay_owner = oc->oc_stateowner;
}
nfs4_unlock_state();
return status;
}
}
-int
-nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner)
+__be32
+nfsd4_open_downgrade(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_open_downgrade *od)
{
- int status;
+ __be32 status;
struct nfs4_stateid *stp;
unsigned int share_access;
dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
- (int)current_fh->fh_dentry->d_name.len,
- current_fh->fh_dentry->d_name.name);
+ (int)cstate->current_fh.fh_dentry->d_name.len,
+ cstate->current_fh.fh_dentry->d_name.name);
- if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
+ if (!access_valid(od->od_share_access)
+ || !deny_valid(od->od_share_deny))
return nfserr_inval;
nfs4_lock_state();
- if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
+ if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
+ od->od_seqid,
&od->od_stateid,
- CHECK_FH | OPEN_STATE,
+ OPEN_STATE,
&od->od_stateowner, &stp, NULL)))
goto out;
out:
if (od->od_stateowner) {
nfs4_get_stateowner(od->od_stateowner);
- *replay_owner = od->od_stateowner;
+ cstate->replay_owner = od->od_stateowner;
}
nfs4_unlock_state();
return status;
/*
* nfs4_unlock_state() called after encode
*/
-int
-nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner)
+__be32
+nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_close *close)
{
- int status;
+ __be32 status;
struct nfs4_stateid *stp;
dprintk("NFSD: nfsd4_close on file %.*s\n",
- (int)current_fh->fh_dentry->d_name.len,
- current_fh->fh_dentry->d_name.name);
+ (int)cstate->current_fh.fh_dentry->d_name.len,
+ cstate->current_fh.fh_dentry->d_name.name);
nfs4_lock_state();
/* check close_lru for replay */
- if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
+ if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
+ close->cl_seqid,
&close->cl_stateid,
- CHECK_FH | OPEN_STATE | CLOSE_STATE,
+ OPEN_STATE | CLOSE_STATE,
&close->cl_stateowner, &stp, NULL)))
goto out;
status = nfs_ok;
memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
/* release_stateid() calls nfsd_close() if needed */
- release_stateid(stp, OPEN_STATE);
+ release_open_stateid(stp);
/* place unused nfs4_stateowners on so_close_lru list to be
* released by the laundromat service after the lease period
out:
if (close->cl_stateowner) {
nfs4_get_stateowner(close->cl_stateowner);
- *replay_owner = close->cl_stateowner;
+ cstate->replay_owner = close->cl_stateowner;
}
nfs4_unlock_state();
return status;
}
-int
-nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
+__be32
+nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_delegreturn *dr)
{
- int status;
+ __be32 status;
- if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
+ if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
goto out;
nfs4_lock_state();
- status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
+ status = nfs4_preprocess_stateid_op(&cstate->current_fh,
+ &dr->dr_stateid, DELEG_RET, NULL);
nfs4_unlock_state();
out:
return status;
#define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
#define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
+static inline u64
+end_offset(u64 start, u64 len)
+{
+ u64 end;
+
+ end = start + len;
+ return end >= start ? end: NFS4_MAX_UINT64;
+}
+
+/* last octet in a range */
+static inline u64
+last_byte_offset(u64 start, u64 len)
+{
+ u64 end;
+
+ BUG_ON(!len);
+ end = start + len;
+ return end > start ? end - 1: NFS4_MAX_UINT64;
+}
+
#define lockownerid_hashval(id) \
((id) & LOCK_HASH_MASK)
static struct nfs4_stateid *
find_stateid(stateid_t *stid, int flags)
{
- struct nfs4_stateid *local = NULL;
+ struct nfs4_stateid *local;
u32 st_id = stid->si_stateownerid;
u32 f_id = stid->si_fileid;
unsigned int hashval;
dprintk("NFSD: find_stateid flags 0x%x\n",flags);
- if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
+ if (flags & (LOCK_STATE | RD_STATE | 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 & RD_STATE) || (flags & WR_STATE)) {
+
+ if (flags & (OPEN_STATE | RD_STATE | 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) &&
deny->ld_clientid.cl_id = 0;
}
deny->ld_start = fl->fl_start;
- deny->ld_length = ~(u64)0;
- if (fl->fl_end != ~(u64)0)
+ deny->ld_length = NFS4_MAX_UINT64;
+ if (fl->fl_end != NFS4_MAX_UINT64)
deny->ld_length = fl->fl_end - fl->fl_start + 1;
deny->ld_type = NFS4_READ_LT;
if (fl->fl_type != F_RDLCK)
struct nfs4_stateowner *op;
list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
- if (cmp_owner_str(op, owner, clid))
+ if (same_owner_str(op, owner, clid))
return op;
}
return NULL;
static int
check_lock_length(u64 offset, u64 length)
{
- return ((length == 0) || ((length != ~(u64)0) &&
+ return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
LOFF_OVERFLOW(offset, length)));
}
/*
* LOCK operation
*/
-int
-nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner)
+__be32
+nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_lock *lock)
{
struct nfs4_stateowner *open_sop = NULL;
struct nfs4_stateowner *lock_sop = NULL;
struct file *filp;
struct file_lock file_lock;
struct file_lock conflock;
- int status = 0;
+ __be32 status = 0;
unsigned int strhashval;
+ unsigned int cmd;
+ int err;
dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
(long long) lock->lk_offset,
if (check_lock_length(lock->lk_offset, lock->lk_length))
return nfserr_inval;
- if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
+ if ((status = fh_verify(rqstp, &cstate->current_fh,
+ S_IFREG, NFSD_MAY_LOCK))) {
dprintk("NFSD: nfsd4_lock: permission denied!\n");
return status;
}
goto out;
/* validate and update open stateid and open seqid */
- status = nfs4_preprocess_seqid_op(current_fh,
+ status = nfs4_preprocess_seqid_op(&cstate->current_fh,
lock->lk_new_open_seqid,
&lock->lk_new_open_stateid,
- CHECK_FH | OPEN_STATE,
+ OPEN_STATE,
&lock->lk_replay_owner, &open_stp,
lock);
if (status)
goto out;
} else {
/* lock (lock owner + lock stateid) already exists */
- status = nfs4_preprocess_seqid_op(current_fh,
+ status = nfs4_preprocess_seqid_op(&cstate->current_fh,
lock->lk_old_lock_seqid,
&lock->lk_old_lock_stateid,
- CHECK_FH | LOCK_STATE,
+ LOCK_STATE,
&lock->lk_replay_owner, &lock_stp, lock);
if (status)
goto out;
filp = lock_stp->st_vfs_file;
status = nfserr_grace;
- if (nfs4_in_grace() && !lock->lk_reclaim)
+ if (locks_in_grace() && !lock->lk_reclaim)
goto out;
status = nfserr_no_grace;
- if (!nfs4_in_grace() && lock->lk_reclaim)
+ if (!locks_in_grace() && lock->lk_reclaim)
goto out;
locks_init_lock(&file_lock);
case NFS4_READ_LT:
case NFS4_READW_LT:
file_lock.fl_type = F_RDLCK;
+ cmd = F_SETLK;
break;
case NFS4_WRITE_LT:
case NFS4_WRITEW_LT:
file_lock.fl_type = F_WRLCK;
+ cmd = F_SETLK;
break;
default:
status = nfserr_inval;
file_lock.fl_lmops = &nfsd_posix_mng_ops;
file_lock.fl_start = lock->lk_offset;
- if ((lock->lk_length == ~(u64)0) ||
- LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
- file_lock.fl_end = ~(u64)0;
- else
- file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
+ file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
nfs4_transform_lock_offset(&file_lock);
/*
* Note: locks.c uses the BKL to protect the inode's lock list.
*/
- /* XXX?: Just to divert the locks_release_private at the start of
- * locks_copy_lock: */
- conflock.fl_ops = NULL;
- conflock.fl_lmops = NULL;
- status = posix_lock_file_conf(filp, &file_lock, &conflock);
- dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status);
- switch (-status) {
+ err = vfs_lock_file(filp, cmd, &file_lock, &conflock);
+ switch (-err) {
case 0: /* success! */
update_stateid(&lock_stp->st_stateid);
memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
sizeof(stateid_t));
+ status = 0;
break;
case (EAGAIN): /* conflock holds conflicting lock */
status = nfserr_denied;
status = nfserr_deadlock;
break;
default:
- dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status);
+ dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
status = nfserr_resource;
break;
}
out:
if (status && lock->lk_is_new && lock_sop)
- release_stateowner(lock_sop);
+ release_lockowner(lock_sop);
if (lock->lk_replay_owner) {
nfs4_get_stateowner(lock->lk_replay_owner);
- *replay_owner = lock->lk_replay_owner;
+ cstate->replay_owner = lock->lk_replay_owner;
}
nfs4_unlock_state();
return status;
}
/*
+ * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
+ * so we do a temporary open here just to get an open file to pass to
+ * vfs_test_lock. (Arguably perhaps test_lock should be done with an
+ * inode operation.)
+ */
+static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
+{
+ struct file *file;
+ int err;
+
+ err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
+ if (err)
+ return err;
+ err = vfs_test_lock(file, lock);
+ nfsd_close(file);
+ return err;
+}
+
+/*
* LOCKT operation
*/
-int
-nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
+__be32
+nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_lockt *lockt)
{
struct inode *inode;
- struct file file;
struct file_lock file_lock;
- struct file_lock conflock;
- int status;
+ int error;
+ __be32 status;
- if (nfs4_in_grace())
+ if (locks_in_grace())
return nfserr_grace;
if (check_lock_length(lockt->lt_offset, lockt->lt_length))
if (STALE_CLIENTID(&lockt->lt_clientid))
goto out;
- if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
+ if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) {
dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
if (status == nfserr_symlink)
status = nfserr_inval;
goto out;
}
- inode = current_fh->fh_dentry->d_inode;
+ inode = cstate->current_fh.fh_dentry->d_inode;
locks_init_lock(&file_lock);
switch (lockt->lt_type) {
case NFS4_READ_LT:
file_lock.fl_type = F_WRLCK;
break;
default:
- printk("NFSD: nfs4_lockt: bad lock type!\n");
+ dprintk("NFSD: nfs4_lockt: bad lock type!\n");
status = nfserr_inval;
goto out;
}
file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
file_lock.fl_pid = current->tgid;
file_lock.fl_flags = FL_POSIX;
- file_lock.fl_lmops = &nfsd_posix_mng_ops;
file_lock.fl_start = lockt->lt_offset;
- if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
- file_lock.fl_end = ~(u64)0;
- else
- file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
+ file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
nfs4_transform_lock_offset(&file_lock);
- /* posix_test_lock uses the struct file _only_ to resolve the inode.
- * since LOCKT doesn't require an OPEN, and therefore a struct
- * file may not exist, pass posix_test_lock a struct file with
- * only the dentry:inode set.
- */
- memset(&file, 0, sizeof (struct file));
- file.f_dentry = current_fh->fh_dentry;
-
status = nfs_ok;
- if (posix_test_lock(&file, &file_lock, &conflock)) {
+ error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock);
+ if (error) {
+ status = nfserrno(error);
+ goto out;
+ }
+ if (file_lock.fl_type != F_UNLCK) {
status = nfserr_denied;
- nfs4_set_lock_denied(&conflock, &lockt->lt_denied);
+ nfs4_set_lock_denied(&file_lock, &lockt->lt_denied);
}
out:
nfs4_unlock_state();
return status;
}
-int
-nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner)
+__be32
+nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_locku *locku)
{
struct nfs4_stateid *stp;
struct file *filp = NULL;
struct file_lock file_lock;
- int status;
+ __be32 status;
+ int err;
dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
(long long) locku->lu_offset,
nfs4_lock_state();
- if ((status = nfs4_preprocess_seqid_op(current_fh,
+ if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh,
locku->lu_seqid,
&locku->lu_stateid,
- CHECK_FH | LOCK_STATE,
+ LOCK_STATE,
&locku->lu_stateowner, &stp, NULL)))
goto out;
file_lock.fl_lmops = &nfsd_posix_mng_ops;
file_lock.fl_start = locku->lu_offset;
- if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
- file_lock.fl_end = ~(u64)0;
- else
- file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
+ file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length);
nfs4_transform_lock_offset(&file_lock);
/*
* Try to unlock the file in the VFS.
*/
- status = posix_lock_file(filp, &file_lock);
- if (status) {
- dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n");
+ err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL);
+ if (err) {
+ dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
goto out_nfserr;
}
/*
out:
if (locku->lu_stateowner) {
nfs4_get_stateowner(locku->lu_stateowner);
- *replay_owner = locku->lu_stateowner;
+ cstate->replay_owner = locku->lu_stateowner;
}
nfs4_unlock_state();
return status;
out_nfserr:
- status = nfserrno(status);
+ status = nfserrno(err);
goto out;
}
check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
{
struct file_lock **flpp;
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = filp->f_path.dentry->d_inode;
int status = 0;
lock_kernel();
return status;
}
-int
-nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
+__be32
+nfsd4_release_lockowner(struct svc_rqst *rqstp,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd4_release_lockowner *rlockowner)
{
clientid_t *clid = &rlockowner->rl_clientid;
struct nfs4_stateowner *sop;
struct xdr_netobj *owner = &rlockowner->rl_owner;
struct list_head matches;
int i;
- int status;
+ __be32 status;
dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
clid->cl_boot, clid->cl_id);
INIT_LIST_HEAD(&matches);
for (i = 0; i < LOCK_HASH_SIZE; i++) {
list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) {
- if (!cmp_owner_str(sop, owner, clid))
+ if (!same_owner_str(sop, owner, clid))
continue;
list_for_each_entry(stp, &sop->so_stateids,
st_perstateowner) {
/* unhash_stateowner deletes so_perclient only
* for openowners. */
list_del(&sop->so_perclient);
- release_stateowner(sop);
+ release_lockowner(sop);
}
out:
nfs4_unlock_state();
/*
* Called from OPEN. Look for clientid in reclaim list.
*/
-int
+__be32
nfs4_check_open_reclaim(clientid_t *clid)
{
return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
/* initialization to perform at module load time: */
-void
+int
nfs4_state_init(void)
{
- int i;
+ int i, status;
+ status = nfsd4_init_slabs();
+ if (status)
+ return status;
for (i = 0; i < CLIENT_HASH_SIZE; i++) {
INIT_LIST_HEAD(&conf_id_hashtbl[i]);
INIT_LIST_HEAD(&conf_str_hashtbl[i]);
for (i = 0; i < CLIENT_HASH_SIZE; i++)
INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
reclaim_str_hashtbl_size = 0;
+ return 0;
}
static void
printk("NFSD: Failure reading reboot recovery data\n");
}
+unsigned long
+get_nfs4_grace_period(void)
+{
+ return max(user_lease_time, lease_time) * HZ;
+}
+
+/*
+ * Since the lifetime of a delegation isn't limited to that of an open, a
+ * client may quite reasonably hang on to a delegation as long as it has
+ * the inode cached. This becomes an obvious problem the first time a
+ * client's inode cache approaches the size of the server's total memory.
+ *
+ * For now we avoid this problem by imposing a hard limit on the number
+ * of delegations, which varies according to the server's memory size.
+ */
+static void
+set_max_delegations(void)
+{
+ /*
+ * Allow at most 4 delegations per megabyte of RAM. Quick
+ * estimates suggest that in the worst case (where every delegation
+ * is for a different inode), a delegation could take about 1.5K,
+ * giving a worst case usage of about 6% of memory.
+ */
+ max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
+}
+
/* initialization to perform when the nfsd service is started: */
static void
__nfs4_state_start(void)
{
- time_t grace_time;
+ unsigned long grace_time;
boot_time = get_seconds();
- grace_time = max(user_lease_time, lease_time);
+ grace_time = get_nfs4_grace_period();
lease_time = user_lease_time;
- in_grace = 1;
- printk("NFSD: starting %ld-second grace period\n", grace_time);
+ locks_start_grace(&nfsd4_manager);
+ printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
+ grace_time/HZ);
laundry_wq = create_singlethread_workqueue("nfsd4");
- queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ);
+ queue_delayed_work(laundry_wq, &laundromat_work, grace_time);
+ set_max_delegations();
}
-int
+void
nfs4_state_start(void)
{
- int status;
-
if (nfs4_init)
- return 0;
- status = nfsd4_init_slabs();
- if (status)
- return status;
+ return;
nfsd4_load_reboot_recovery_data();
__nfs4_state_start();
nfs4_init = 1;
- return 0;
-}
-
-int
-nfs4_in_grace(void)
-{
- return in_grace;
+ return;
}
time_t
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])) {
clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
unhash_delegation(dp);
}
- cancel_delayed_work(&laundromat_work);
nfsd4_shutdown_recdir();
nfs4_init = 0;
}
{
cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work);
destroy_workqueue(laundry_wq);
+ locks_end_grace(&nfsd4_manager);
nfs4_lock_state();
nfs4_release_reclaim();
__nfs4_state_shutdown();
- nfsd4_free_slabs();
nfs4_unlock_state();
}
+/*
+ * user_recovery_dirname is protected by the nfsd_mutex since it's only
+ * accessed when nfsd is starting.
+ */
static void
nfs4_set_recdir(char *recdir)
{
- nfs4_lock_state();
strcpy(user_recovery_dirname, recdir);
- nfs4_unlock_state();
}
/*
nfs4_reset_recoverydir(char *recdir)
{
int status;
- struct nameidata nd;
+ struct path path;
- status = path_lookup(recdir, LOOKUP_FOLLOW, &nd);
+ status = kern_path(recdir, LOOKUP_FOLLOW, &path);
if (status)
return status;
status = -ENOTDIR;
- if (S_ISDIR(nd.dentry->d_inode->i_mode)) {
+ if (S_ISDIR(path.dentry->d_inode->i_mode)) {
nfs4_set_recdir(recdir);
status = 0;
}
- path_release(&nd);
+ path_put(&path);
return status;
}
+char *
+nfs4_recoverydir(void)
+{
+ return user_recovery_dirname;
+}
+
/*
* Called when leasetime is changed.
*
* 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)
{
- lock_kernel();
user_lease_time = leasetime;
- unlock_kernel();
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff