----------------------- lock_manager_operations ---------------------------
prototypes:
- int (*lm_compare_owner)(struct file_lock *, struct file_lock *);
- unsigned long (*lm_owner_key)(struct file_lock *);
void (*lm_notify)(struct file_lock *); /* unblock callback */
int (*lm_grant)(struct file_lock *, struct file_lock *, int);
void (*lm_break)(struct file_lock *); /* break_lease callback */
locking rules:
inode->i_lock blocked_lock_lock may block
-lm_compare_owner: yes[1] maybe no
-lm_owner_key yes[1] yes no
lm_notify: yes yes no
lm_grant: no no no
lm_break: yes no no
lm_change yes no no
-[1]: ->lm_compare_owner and ->lm_owner_key are generally called with
-*an* inode->i_lock held. It may not be the i_lock of the inode
-associated with either file_lock argument! This is the case with deadlock
-detection, since the code has to chase down the owners of locks that may
-be entirely unrelated to the one on which the lock is being acquired.
-For deadlock detection however, the blocked_lock_lock is also held. The
-fact that these locks are held ensures that the file_locks do not
-disappear out from under you while doing the comparison or generating an
-owner key.
-
--------------------------- buffer_head -----------------------------------
prototypes:
void (*b_end_io)(struct buffer_head *bh, int uptodate);
c->len=4;
}
-static struct nlm_lockowner *nlm_get_lockowner(struct nlm_lockowner *lockowner)
+static struct nlm_lockowner *
+nlmclnt_get_lockowner(struct nlm_lockowner *lockowner)
{
refcount_inc(&lockowner->count);
return lockowner;
}
-static void nlm_put_lockowner(struct nlm_lockowner *lockowner)
+static void nlmclnt_put_lockowner(struct nlm_lockowner *lockowner)
{
if (!refcount_dec_and_lock(&lockowner->count, &lockowner->host->h_lock))
return;
return res;
}
-static struct nlm_lockowner *__nlm_find_lockowner(struct nlm_host *host, fl_owner_t owner)
+static struct nlm_lockowner *__nlmclnt_find_lockowner(struct nlm_host *host, fl_owner_t owner)
{
struct nlm_lockowner *lockowner;
list_for_each_entry(lockowner, &host->h_lockowners, list) {
if (lockowner->owner != owner)
continue;
- return nlm_get_lockowner(lockowner);
+ return nlmclnt_get_lockowner(lockowner);
}
return NULL;
}
-static struct nlm_lockowner *nlm_find_lockowner(struct nlm_host *host, fl_owner_t owner)
+static struct nlm_lockowner *nlmclnt_find_lockowner(struct nlm_host *host, fl_owner_t owner)
{
struct nlm_lockowner *res, *new = NULL;
spin_lock(&host->h_lock);
- res = __nlm_find_lockowner(host, owner);
+ res = __nlmclnt_find_lockowner(host, owner);
if (res == NULL) {
spin_unlock(&host->h_lock);
new = kmalloc(sizeof(*new), GFP_KERNEL);
spin_lock(&host->h_lock);
- res = __nlm_find_lockowner(host, owner);
+ res = __nlmclnt_find_lockowner(host, owner);
if (res == NULL && new != NULL) {
res = new;
refcount_set(&new->count, 1);
{
spin_lock(&fl->fl_u.nfs_fl.owner->host->h_lock);
new->fl_u.nfs_fl.state = fl->fl_u.nfs_fl.state;
- new->fl_u.nfs_fl.owner = nlm_get_lockowner(fl->fl_u.nfs_fl.owner);
+ new->fl_u.nfs_fl.owner = nlmclnt_get_lockowner(fl->fl_u.nfs_fl.owner);
list_add_tail(&new->fl_u.nfs_fl.list, &fl->fl_u.nfs_fl.owner->host->h_granted);
spin_unlock(&fl->fl_u.nfs_fl.owner->host->h_lock);
}
spin_lock(&fl->fl_u.nfs_fl.owner->host->h_lock);
list_del(&fl->fl_u.nfs_fl.list);
spin_unlock(&fl->fl_u.nfs_fl.owner->host->h_lock);
- nlm_put_lockowner(fl->fl_u.nfs_fl.owner);
+ nlmclnt_put_lockowner(fl->fl_u.nfs_fl.owner);
}
static const struct file_lock_operations nlmclnt_lock_ops = {
static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *host)
{
fl->fl_u.nfs_fl.state = 0;
- fl->fl_u.nfs_fl.owner = nlm_find_lockowner(host, fl->fl_owner);
+ fl->fl_u.nfs_fl.owner = nlmclnt_find_lockowner(host, fl->fl_owner);
INIT_LIST_HEAD(&fl->fl_u.nfs_fl.list);
fl->fl_ops = &nlmclnt_lock_ops;
}
/* Set up the missing parts of the file_lock structure */
lock->fl.fl_file = file->f_file;
- lock->fl.fl_owner = (fl_owner_t) host;
+ lock->fl.fl_pid = current->tgid;
lock->fl.fl_lmops = &nlmsvc_lock_operations;
+ nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
+ if (!lock->fl.fl_owner) {
+ /* lockowner allocation has failed */
+ nlmsvc_release_host(host);
+ return nlm_lck_denied_nolocks;
+ }
}
return 0;
else
dprintk("lockd: TEST4 status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
else
dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock);
dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
resp->status = nlmsvc_unlock(SVC_NET(rqstp), file, &argp->lock);
dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
resp->status = nlmsvc_share_file(host, file, argp);
dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
resp->status = nlmsvc_unshare_file(host, file, argp);
dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
mutex_unlock(&file->f_mutex);
}
+static struct nlm_lockowner *
+nlmsvc_get_lockowner(struct nlm_lockowner *lockowner)
+{
+ refcount_inc(&lockowner->count);
+ return lockowner;
+}
+
+static void nlmsvc_put_lockowner(struct nlm_lockowner *lockowner)
+{
+ if (!refcount_dec_and_lock(&lockowner->count, &lockowner->host->h_lock))
+ return;
+ list_del(&lockowner->list);
+ spin_unlock(&lockowner->host->h_lock);
+ nlmsvc_release_host(lockowner->host);
+ kfree(lockowner);
+}
+
+static struct nlm_lockowner *__nlmsvc_find_lockowner(struct nlm_host *host, pid_t pid)
+{
+ struct nlm_lockowner *lockowner;
+ list_for_each_entry(lockowner, &host->h_lockowners, list) {
+ if (lockowner->pid != pid)
+ continue;
+ return nlmsvc_get_lockowner(lockowner);
+ }
+ return NULL;
+}
+
+static struct nlm_lockowner *nlmsvc_find_lockowner(struct nlm_host *host, pid_t pid)
+{
+ struct nlm_lockowner *res, *new = NULL;
+
+ spin_lock(&host->h_lock);
+ res = __nlmsvc_find_lockowner(host, pid);
+
+ if (res == NULL) {
+ spin_unlock(&host->h_lock);
+ new = kmalloc(sizeof(*res), GFP_KERNEL);
+ spin_lock(&host->h_lock);
+ res = __nlmsvc_find_lockowner(host, pid);
+ if (res == NULL && new != NULL) {
+ res = new;
+ /* fs/locks.c will manage the refcount through lock_ops */
+ refcount_set(&new->count, 1);
+ new->pid = pid;
+ new->host = nlm_get_host(host);
+ list_add(&new->list, &host->h_lockowners);
+ new = NULL;
+ }
+ }
+
+ spin_unlock(&host->h_lock);
+ kfree(new);
+ return res;
+}
+
+void
+nlmsvc_release_lockowner(struct nlm_lock *lock)
+{
+ if (lock->fl.fl_owner)
+ nlmsvc_put_lockowner(lock->fl.fl_owner);
+}
+
+static void nlmsvc_locks_copy_lock(struct file_lock *new, struct file_lock *fl)
+{
+ struct nlm_lockowner *nlm_lo = (struct nlm_lockowner *)fl->fl_owner;
+ new->fl_owner = nlmsvc_get_lockowner(nlm_lo);
+}
+
+static void nlmsvc_locks_release_private(struct file_lock *fl)
+{
+ nlmsvc_put_lockowner((struct nlm_lockowner *)fl->fl_owner);
+}
+
+static const struct file_lock_operations nlmsvc_lock_ops = {
+ .fl_copy_lock = nlmsvc_locks_copy_lock,
+ .fl_release_private = nlmsvc_locks_release_private,
+};
+
+void nlmsvc_locks_init_private(struct file_lock *fl, struct nlm_host *host,
+ pid_t pid)
+{
+ fl->fl_owner = nlmsvc_find_lockowner(host, pid);
+ if (fl->fl_owner != NULL)
+ fl->fl_ops = &nlmsvc_lock_ops;
+}
+
/*
* Initialize arguments for GRANTED call. The nlm_rqst structure
* has been cleared already.
/* set default data area */
call->a_args.lock.oh.data = call->a_owner;
- call->a_args.lock.svid = lock->fl.fl_pid;
+ call->a_args.lock.svid = ((struct nlm_lockowner *)lock->fl.fl_owner)->pid;
if (lock->oh.len > NLMCLNT_OHSIZE) {
void *data = kmalloc(lock->oh.len, GFP_KERNEL);
{
int error;
__be32 ret;
+ struct nlm_lockowner *test_owner;
dprintk("lockd: nlmsvc_testlock(%s/%ld, ty=%d, %Ld-%Ld)\n",
locks_inode(file->f_file)->i_sb->s_id,
goto out;
}
+ /* If there's a conflicting lock, remember to clean up the test lock */
+ test_owner = (struct nlm_lockowner *)lock->fl.fl_owner;
+
error = vfs_test_lock(file->f_file, &lock->fl);
if (error) {
/* We can't currently deal with deferred test requests */
conflock->caller = "somehost"; /* FIXME */
conflock->len = strlen(conflock->caller);
conflock->oh.len = 0; /* don't return OH info */
- conflock->svid = lock->fl.fl_pid;
+ conflock->svid = ((struct nlm_lockowner *)lock->fl.fl_owner)->pid;
conflock->fl.fl_type = lock->fl.fl_type;
conflock->fl.fl_start = lock->fl.fl_start;
conflock->fl.fl_end = lock->fl.fl_end;
locks_release_private(&lock->fl);
+
+ /* Clean up the test lock */
+ lock->fl.fl_owner = NULL;
+ nlmsvc_put_lockowner(test_owner);
+
ret = nlm_lck_denied;
out:
return ret;
printk(KERN_WARNING "lockd: notification for unknown block!\n");
}
-static int nlmsvc_same_owner(struct file_lock *fl1, struct file_lock *fl2)
-{
- return fl1->fl_owner == fl2->fl_owner && fl1->fl_pid == fl2->fl_pid;
-}
-
-/*
- * Since NLM uses two "keys" for tracking locks, we need to hash them down
- * to one for the blocked_hash. Here, we're just xor'ing the host address
- * with the pid in order to create a key value for picking a hash bucket.
- */
-static unsigned long
-nlmsvc_owner_key(struct file_lock *fl)
-{
- return (unsigned long)fl->fl_owner ^ (unsigned long)fl->fl_pid;
-}
-
const struct lock_manager_operations nlmsvc_lock_operations = {
- .lm_compare_owner = nlmsvc_same_owner,
- .lm_owner_key = nlmsvc_owner_key,
.lm_notify = nlmsvc_notify_blocked,
.lm_grant = nlmsvc_grant_deferred,
};
/* Set up the missing parts of the file_lock structure */
lock->fl.fl_file = file->f_file;
- lock->fl.fl_owner = (fl_owner_t) host;
+ lock->fl.fl_pid = current->tgid;
lock->fl.fl_lmops = &nlmsvc_lock_operations;
+ nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
+ if (!lock->fl.fl_owner) {
+ /* lockowner allocation has failed */
+ nlmsvc_release_host(host);
+ return nlm_lck_denied_nolocks;
+ }
}
return 0;
dprintk("lockd: TEST status %d vers %d\n",
ntohl(resp->status), rqstp->rq_vers);
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
else
dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
resp->status = cast_status(nlmsvc_share_file(host, file, argp));
dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
+ nlmsvc_release_lockowner(&argp->lock);
nlmsvc_release_host(host);
nlm_release_file(file);
return rpc_success;
/* update current lock count */
file->f_locks++;
- lockhost = (struct nlm_host *) fl->fl_owner;
+ lockhost = ((struct nlm_lockowner *)fl->fl_owner)->host;
if (match(lockhost, host)) {
struct file_lock lock = *fl;
lock->svid = ntohl(*p++);
locks_init_lock(fl);
- fl->fl_owner = current->files;
- fl->fl_pid = (pid_t)lock->svid;
fl->fl_flags = FL_POSIX;
fl->fl_type = F_RDLCK; /* as good as anything else */
start = ntohl(*p++);
memset(lock, 0, sizeof(*lock));
locks_init_lock(&lock->fl);
lock->svid = ~(u32) 0;
- lock->fl.fl_pid = (pid_t)lock->svid;
if (!(p = nlm_decode_cookie(p, &argp->cookie))
|| !(p = xdr_decode_string_inplace(p, &lock->caller,
lock->svid = ntohl(*p++);
locks_init_lock(fl);
- fl->fl_owner = current->files;
- fl->fl_pid = (pid_t)lock->svid;
fl->fl_flags = FL_POSIX;
fl->fl_type = F_RDLCK; /* as good as anything else */
p = xdr_decode_hyper(p, &start);
memset(lock, 0, sizeof(*lock));
locks_init_lock(&lock->fl);
lock->svid = ~(u32) 0;
- lock->fl.fl_pid = (pid_t)lock->svid;
if (!(p = nlm4_decode_cookie(p, &argp->cookie))
|| !(p = xdr_decode_string_inplace(p, &lock->caller,
*/
static int posix_same_owner(struct file_lock *fl1, struct file_lock *fl2)
{
- if (fl1->fl_lmops && fl1->fl_lmops->lm_compare_owner)
- return fl2->fl_lmops == fl1->fl_lmops &&
- fl1->fl_lmops->lm_compare_owner(fl1, fl2);
return fl1->fl_owner == fl2->fl_owner;
}
static unsigned long
posix_owner_key(struct file_lock *fl)
{
- if (fl->fl_lmops && fl->fl_lmops->lm_owner_key)
- return fl->fl_lmops->lm_owner_key(fl);
return (unsigned long)fl->fl_owner;
}
{
loff_t new_size = lcp->lc_last_wr + 1;
struct iattr iattr = { .ia_valid = 0 };
- struct timespec ts;
int error;
- ts = timespec64_to_timespec(inode->i_mtime);
if (lcp->lc_mtime.tv_nsec == UTIME_NOW ||
- timespec_compare(&lcp->lc_mtime, &ts) < 0)
- lcp->lc_mtime = timespec64_to_timespec(current_time(inode));
+ timespec64_compare(&lcp->lc_mtime, &inode->i_mtime) < 0)
+ lcp->lc_mtime = current_time(inode);
iattr.ia_valid |= ATTR_ATIME | ATTR_CTIME | ATTR_MTIME;
- iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = timespec_to_timespec64(lcp->lc_mtime);
+ iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = lcp->lc_mtime;
if (new_size > i_size_read(inode)) {
iattr.ia_valid |= ATTR_SIZE;
#define NFSCACHE_H
#include <linux/sunrpc/svc.h>
+#include "netns.h"
/*
* Representation of a reply cache entry.
/* Checksum this amount of the request */
#define RC_CSUMLEN (256U)
-int nfsd_reply_cache_init(void);
-void nfsd_reply_cache_shutdown(void);
+int nfsd_reply_cache_init(struct nfsd_net *);
+void nfsd_reply_cache_shutdown(struct nfsd_net *);
int nfsd_cache_lookup(struct svc_rqst *);
void nfsd_cache_update(struct svc_rqst *, int, __be32 *);
int nfsd_reply_cache_stats_open(struct inode *, struct file *);
bool grace_ended;
time_t boot_time;
+ /* internal mount of the "nfsd" pseudofilesystem: */
+ struct vfsmount *nfsd_mnt;
+
+ struct dentry *nfsd_client_dir;
+
/*
* reclaim_str_hashtbl[] holds known client info from previous reset/reboot
* used in reboot/reset lease grace period processing
*/
unsigned int max_connections;
+ u32 clientid_base;
u32 clientid_counter;
u32 clverifier_counter;
*/
bool *nfsd_versions;
bool *nfsd4_minorversions;
+
+ /*
+ * Duplicate reply cache
+ */
+ struct nfsd_drc_bucket *drc_hashtbl;
+ struct kmem_cache *drc_slab;
+
+ /* max number of entries allowed in the cache */
+ unsigned int max_drc_entries;
+
+ /* number of significant bits in the hash value */
+ unsigned int maskbits;
+ unsigned int drc_hashsize;
+
+ /*
+ * Stats and other tracking of on the duplicate reply cache.
+ * These fields and the "rc" fields in nfsdstats are modified
+ * with only the per-bucket cache lock, which isn't really safe
+ * and should be fixed if we want the statistics to be
+ * completely accurate.
+ */
+
+ /* total number of entries */
+ atomic_t num_drc_entries;
+
+ /* cache misses due only to checksum comparison failures */
+ unsigned int payload_misses;
+
+ /* amount of memory (in bytes) currently consumed by the DRC */
+ unsigned int drc_mem_usage;
+
+ /* longest hash chain seen */
+ unsigned int longest_chain;
+
+ /* size of cache when we saw the longest hash chain */
+ unsigned int longest_chain_cachesize;
+
+ struct shrinker nfsd_reply_cache_shrinker;
};
/* Simple check to find out if a given net was properly initialized */
new->type = itm->type;
strlcpy(new->name, itm->name, sizeof(new->name));
- strlcpy(new->authname, itm->authname, sizeof(new->name));
+ strlcpy(new->authname, itm->authname, sizeof(new->authname));
}
static void
#include <linux/sunrpc/svcauth_gss.h>
#include <linux/sunrpc/addr.h>
#include <linux/jhash.h>
+#include <linux/string_helpers.h>
#include "xdr4.h"
#include "xdr4cb.h"
#include "vfs.h"
*/
static DECLARE_WAIT_QUEUE_HEAD(close_wq);
+/*
+ * A waitqueue where a writer to clients/#/ctl destroying a client can
+ * wait for cl_rpc_users to drop to 0 and then for the client to be
+ * unhashed.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(expiry_wq);
+
static struct kmem_cache *client_slab;
static struct kmem_cache *openowner_slab;
static struct kmem_cache *lockowner_slab;
if (is_client_expired(clp))
return nfserr_expired;
- atomic_inc(&clp->cl_refcount);
+ atomic_inc(&clp->cl_rpc_users);
return nfs_ok;
}
lockdep_assert_held(&nn->client_lock);
- if (!atomic_dec_and_test(&clp->cl_refcount))
+ if (!atomic_dec_and_test(&clp->cl_rpc_users))
return;
if (!is_client_expired(clp))
renew_client_locked(clp);
+ else
+ wake_up_all(&expiry_wq);
}
static void put_client_renew(struct nfs4_client *clp)
{
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
- if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
+ if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock))
return;
if (!is_client_expired(clp))
renew_client_locked(clp);
+ else
+ wake_up_all(&expiry_wq);
spin_unlock(&nn->client_lock);
}
idr_preload(GFP_KERNEL);
spin_lock(&cl->cl_lock);
- new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT);
+ /* Reserving 0 for start of file in nfsdfs "states" file: */
+ new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT);
spin_unlock(&cl->cl_lock);
idr_preload_end();
if (new_id < 0)
clp = kmem_cache_zalloc(client_slab, GFP_KERNEL);
if (clp == NULL)
return NULL;
- clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
+ xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL);
if (clp->cl_name.data == NULL)
goto err_no_name;
clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE,
goto err_no_hashtbl;
for (i = 0; i < OWNER_HASH_SIZE; i++)
INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
- clp->cl_name.len = name.len;
INIT_LIST_HEAD(&clp->cl_sessions);
idr_init(&clp->cl_stateids);
- atomic_set(&clp->cl_refcount, 0);
+ atomic_set(&clp->cl_rpc_users, 0);
clp->cl_cb_state = NFSD4_CB_UNKNOWN;
INIT_LIST_HEAD(&clp->cl_idhash);
INIT_LIST_HEAD(&clp->cl_openowners);
return NULL;
}
+static void __free_client(struct kref *k)
+{
+ struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref);
+ struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs);
+
+ free_svc_cred(&clp->cl_cred);
+ kfree(clp->cl_ownerstr_hashtbl);
+ kfree(clp->cl_name.data);
+ kfree(clp->cl_nii_domain.data);
+ kfree(clp->cl_nii_name.data);
+ idr_destroy(&clp->cl_stateids);
+ kmem_cache_free(client_slab, clp);
+}
+
+static void drop_client(struct nfs4_client *clp)
+{
+ kref_put(&clp->cl_nfsdfs.cl_ref, __free_client);
+}
+
static void
free_client(struct nfs4_client *clp)
{
free_session(ses);
}
rpc_destroy_wait_queue(&clp->cl_cb_waitq);
- free_svc_cred(&clp->cl_cred);
- kfree(clp->cl_ownerstr_hashtbl);
- kfree(clp->cl_name.data);
- idr_destroy(&clp->cl_stateids);
- kmem_cache_free(client_slab, clp);
+ if (clp->cl_nfsd_dentry) {
+ nfsd_client_rmdir(clp->cl_nfsd_dentry);
+ clp->cl_nfsd_dentry = NULL;
+ wake_up_all(&expiry_wq);
+ }
+ drop_client(clp);
}
/* must be called under the client_lock */
static __be32 mark_client_expired_locked(struct nfs4_client *clp)
{
- if (atomic_read(&clp->cl_refcount))
+ if (atomic_read(&clp->cl_rpc_users))
return nfserr_jukebox;
unhash_client_locked(clp);
return nfs_ok;
if (clp->cl_cb_conn.cb_xprt)
svc_xprt_put(clp->cl_cb_conn.cb_xprt);
free_client(clp);
+ wake_up_all(&expiry_wq);
}
static void
return s;
}
+static struct nfs4_client *get_nfsdfs_clp(struct inode *inode)
+{
+ struct nfsdfs_client *nc;
+ nc = get_nfsdfs_client(inode);
+ if (!nc)
+ return NULL;
+ return container_of(nc, struct nfs4_client, cl_nfsdfs);
+}
+
+static void seq_quote_mem(struct seq_file *m, char *data, int len)
+{
+ seq_printf(m, "\"");
+ seq_escape_mem_ascii(m, data, len);
+ seq_printf(m, "\"");
+}
+
+static int client_info_show(struct seq_file *m, void *v)
+{
+ struct inode *inode = m->private;
+ struct nfs4_client *clp;
+ u64 clid;
+
+ clp = get_nfsdfs_clp(inode);
+ if (!clp)
+ return -ENXIO;
+ memcpy(&clid, &clp->cl_clientid, sizeof(clid));
+ seq_printf(m, "clientid: 0x%llx\n", clid);
+ seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);
+ seq_printf(m, "name: ");
+ seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);
+ seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);
+ if (clp->cl_nii_domain.data) {
+ seq_printf(m, "Implementation domain: ");
+ seq_quote_mem(m, clp->cl_nii_domain.data,
+ clp->cl_nii_domain.len);
+ seq_printf(m, "\nImplementation name: ");
+ seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);
+ seq_printf(m, "\nImplementation time: [%ld, %ld]\n",
+ clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);
+ }
+ drop_client(clp);
+
+ return 0;
+}
+
+static int client_info_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, client_info_show, inode);
+}
+
+static const struct file_operations client_info_fops = {
+ .open = client_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void *states_start(struct seq_file *s, loff_t *pos)
+ __acquires(&clp->cl_lock)
+{
+ struct nfs4_client *clp = s->private;
+ unsigned long id = *pos;
+ void *ret;
+
+ spin_lock(&clp->cl_lock);
+ ret = idr_get_next_ul(&clp->cl_stateids, &id);
+ *pos = id;
+ return ret;
+}
+
+static void *states_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ struct nfs4_client *clp = s->private;
+ unsigned long id = *pos;
+ void *ret;
+
+ id = *pos;
+ id++;
+ ret = idr_get_next_ul(&clp->cl_stateids, &id);
+ *pos = id;
+ return ret;
+}
+
+static void states_stop(struct seq_file *s, void *v)
+ __releases(&clp->cl_lock)
+{
+ struct nfs4_client *clp = s->private;
+
+ spin_unlock(&clp->cl_lock);
+}
+
+static void nfs4_show_superblock(struct seq_file *s, struct file *f)
+{
+ struct inode *inode = file_inode(f);
+
+ seq_printf(s, "superblock: \"%02x:%02x:%ld\"",
+ MAJOR(inode->i_sb->s_dev),
+ MINOR(inode->i_sb->s_dev),
+ inode->i_ino);
+}
+
+static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo)
+{
+ seq_printf(s, "owner: ");
+ seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len);
+}
+
+static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st)
+{
+ struct nfs4_ol_stateid *ols;
+ struct nfs4_file *nf;
+ struct file *file;
+ struct nfs4_stateowner *oo;
+ unsigned int access, deny;
+
+ if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID)
+ return 0; /* XXX: or SEQ_SKIP? */
+ ols = openlockstateid(st);
+ oo = ols->st_stateowner;
+ nf = st->sc_file;
+ file = find_any_file(nf);
+
+ seq_printf(s, "- 0x%16phN: { type: open, ", &st->sc_stateid);
+
+ access = bmap_to_share_mode(ols->st_access_bmap);
+ deny = bmap_to_share_mode(ols->st_deny_bmap);
+
+ seq_printf(s, "access: \%s\%s, ",
+ access & NFS4_SHARE_ACCESS_READ ? "r" : "-",
+ access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
+ seq_printf(s, "deny: \%s\%s, ",
+ deny & NFS4_SHARE_ACCESS_READ ? "r" : "-",
+ deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
+
+ nfs4_show_superblock(s, file);
+ seq_printf(s, ", ");
+ nfs4_show_owner(s, oo);
+ seq_printf(s, " }\n");
+ fput(file);
+
+ return 0;
+}
+
+static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st)
+{
+ struct nfs4_ol_stateid *ols;
+ struct nfs4_file *nf;
+ struct file *file;
+ struct nfs4_stateowner *oo;
+
+ ols = openlockstateid(st);
+ oo = ols->st_stateowner;
+ nf = st->sc_file;
+ file = find_any_file(nf);
+
+ seq_printf(s, "- 0x%16phN: { type: lock, ", &st->sc_stateid);
+
+ /*
+ * Note: a lock stateid isn't really the same thing as a lock,
+ * it's the locking state held by one owner on a file, and there
+ * may be multiple (or no) lock ranges associated with it.
+ * (Same for the matter is true of open stateids.)
+ */
+
+ nfs4_show_superblock(s, file);
+ /* XXX: open stateid? */
+ seq_printf(s, ", ");
+ nfs4_show_owner(s, oo);
+ seq_printf(s, " }\n");
+ fput(file);
+
+ return 0;
+}
+
+static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st)
+{
+ struct nfs4_delegation *ds;
+ struct nfs4_file *nf;
+ struct file *file;
+
+ ds = delegstateid(st);
+ nf = st->sc_file;
+ file = nf->fi_deleg_file;
+
+ seq_printf(s, "- 0x%16phN: { type: deleg, ", &st->sc_stateid);
+
+ /* Kinda dead code as long as we only support read delegs: */
+ seq_printf(s, "access: %s, ",
+ ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w");
+
+ /* XXX: lease time, whether it's being recalled. */
+
+ nfs4_show_superblock(s, file);
+ seq_printf(s, " }\n");
+
+ return 0;
+}
+
+static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st)
+{
+ struct nfs4_layout_stateid *ls;
+ struct file *file;
+
+ ls = container_of(st, struct nfs4_layout_stateid, ls_stid);
+ file = ls->ls_file;
+
+ seq_printf(s, "- 0x%16phN: { type: layout, ", &st->sc_stateid);
+
+ /* XXX: What else would be useful? */
+
+ nfs4_show_superblock(s, file);
+ seq_printf(s, " }\n");
+
+ return 0;
+}
+
+static int states_show(struct seq_file *s, void *v)
+{
+ struct nfs4_stid *st = v;
+
+ switch (st->sc_type) {
+ case NFS4_OPEN_STID:
+ return nfs4_show_open(s, st);
+ case NFS4_LOCK_STID:
+ return nfs4_show_lock(s, st);
+ case NFS4_DELEG_STID:
+ return nfs4_show_deleg(s, st);
+ case NFS4_LAYOUT_STID:
+ return nfs4_show_layout(s, st);
+ default:
+ return 0; /* XXX: or SEQ_SKIP? */
+ }
+ /* XXX: copy stateids? */
+}
+
+static struct seq_operations states_seq_ops = {
+ .start = states_start,
+ .next = states_next,
+ .stop = states_stop,
+ .show = states_show
+};
+
+static int client_states_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *s;
+ struct nfs4_client *clp;
+ int ret;
+
+ clp = get_nfsdfs_clp(inode);
+ if (!clp)
+ return -ENXIO;
+
+ ret = seq_open(file, &states_seq_ops);
+ if (ret)
+ return ret;
+ s = file->private_data;
+ s->private = clp;
+ return 0;
+}
+
+static int client_opens_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *m = file->private_data;
+ struct nfs4_client *clp = m->private;
+
+ /* XXX: alternatively, we could get/drop in seq start/stop */
+ drop_client(clp);
+ return 0;
+}
+
+static const struct file_operations client_states_fops = {
+ .open = client_states_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = client_opens_release,
+};
+
+/*
+ * Normally we refuse to destroy clients that are in use, but here the
+ * administrator is telling us to just do it. We also want to wait
+ * so the caller has a guarantee that the client's locks are gone by
+ * the time the write returns:
+ */
+static void force_expire_client(struct nfs4_client *clp)
+{
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+ bool already_expired;
+
+ spin_lock(&clp->cl_lock);
+ clp->cl_time = 0;
+ spin_unlock(&clp->cl_lock);
+
+ wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0);
+ spin_lock(&nn->client_lock);
+ already_expired = list_empty(&clp->cl_lru);
+ if (!already_expired)
+ unhash_client_locked(clp);
+ spin_unlock(&nn->client_lock);
+
+ if (!already_expired)
+ expire_client(clp);
+ else
+ wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL);
+}
+
+static ssize_t client_ctl_write(struct file *file, const char __user *buf,
+ size_t size, loff_t *pos)
+{
+ char *data;
+ struct nfs4_client *clp;
+
+ data = simple_transaction_get(file, buf, size);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+ if (size != 7 || 0 != memcmp(data, "expire\n", 7))
+ return -EINVAL;
+ clp = get_nfsdfs_clp(file_inode(file));
+ if (!clp)
+ return -ENXIO;
+ force_expire_client(clp);
+ drop_client(clp);
+ return 7;
+}
+
+static const struct file_operations client_ctl_fops = {
+ .write = client_ctl_write,
+ .release = simple_transaction_release,
+};
+
+static const struct tree_descr client_files[] = {
+ [0] = {"info", &client_info_fops, S_IRUSR},
+ [1] = {"states", &client_states_fops, S_IRUSR},
+ [2] = {"ctl", &client_ctl_fops, S_IRUSR|S_IWUSR},
+ [3] = {""},
+};
+
static struct nfs4_client *create_client(struct xdr_netobj name,
struct svc_rqst *rqstp, nfs4_verifier *verf)
{
struct sockaddr *sa = svc_addr(rqstp);
int ret;
struct net *net = SVC_NET(rqstp);
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
clp = alloc_client(name);
if (clp == NULL)
free_client(clp);
return NULL;
}
+ gen_clid(clp, nn);
+ kref_init(&clp->cl_nfsdfs.cl_ref);
nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
clp->cl_time = get_seconds();
clear_bit(0, &clp->cl_cb_slot_busy);
copy_verf(clp, verf);
- rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
+ memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));
clp->cl_cb_session = NULL;
clp->net = net;
+ clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs,
+ clp->cl_clientid.cl_id - nn->clientid_base,
+ client_files);
+ if (!clp->cl_nfsd_dentry) {
+ free_client(clp);
+ return NULL;
+ }
return clp;
}
|| !list_empty(&clp->async_copies);
}
+static __be32 copy_impl_id(struct nfs4_client *clp,
+ struct nfsd4_exchange_id *exid)
+{
+ if (!exid->nii_domain.data)
+ return 0;
+ xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL);
+ if (!clp->cl_nii_domain.data)
+ return nfserr_jukebox;
+ xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);
+ if (!clp->cl_nii_name.data)
+ return nfserr_jukebox;
+ clp->cl_nii_time.tv_sec = exid->nii_time.tv_sec;
+ clp->cl_nii_time.tv_nsec = exid->nii_time.tv_nsec;
+ return 0;
+}
+
__be32
nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
new = create_client(exid->clname, rqstp, &verf);
if (new == NULL)
return nfserr_jukebox;
+ status = copy_impl_id(new, exid);
+ if (status)
+ goto out_nolock;
switch (exid->spa_how) {
case SP4_MACH_CRED:
new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];
- gen_clid(new, nn);
add_to_unconfirmed(new);
swap(new, conf);
out_copy:
copy_clid(new, conf);
gen_confirm(new, nn);
} else /* case 4 (new client) or cases 2, 3 (client reboot): */
- gen_clid(new, nn);
+ ;
new->cl_minorversion = 0;
gen_callback(new, setclid, rqstp);
add_to_unconfirmed(new);
if (!sop)
return NULL;
- sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
+ xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL);
if (!sop->so_owner.data) {
kmem_cache_free(slab, sop);
return NULL;
}
- sop->so_owner.len = owner->len;
INIT_LIST_HEAD(&sop->so_stateids);
sop->so_client = clp;
spin_unlock(&nn->client_lock);
return nfserr_expired;
}
- atomic_inc(&found->cl_refcount);
+ atomic_inc(&found->cl_rpc_users);
spin_unlock(&nn->client_lock);
/* Cache the nfs4_client in cstate! */
if (fl->fl_lmops == &nfsd_posix_mng_ops) {
lo = (struct nfs4_lockowner *) fl->fl_owner;
- deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
- lo->lo_owner.so_owner.len, GFP_KERNEL);
+ xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner,
+ GFP_KERNEL);
if (!deny->ld_owner.data)
/* We just don't care that much */
goto nevermind;
- deny->ld_owner.len = lo->lo_owner.so_owner.len;
deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
} else {
nevermind:
static inline void
put_client(struct nfs4_client *clp)
{
- atomic_dec(&clp->cl_refcount);
+ atomic_dec(&clp->cl_rpc_users);
}
static struct nfs4_client *
return;
lockdep_assert_held(&nn->client_lock);
- atomic_inc(&clp->cl_refcount);
+ atomic_inc(&clp->cl_rpc_users);
list_add(&lst->st_locks, collect);
}
* Despite the fact that these functions deal
* with 64-bit integers for "count", we must
* ensure that it doesn't blow up the
- * clp->cl_refcount. Throw a warning if we
+ * clp->cl_rpc_users. Throw a warning if we
* start to approach INT_MAX here.
*/
WARN_ON_ONCE(count == (INT_MAX / 2));
if (func) {
func(oop);
if (collect) {
- atomic_inc(&clp->cl_refcount);
+ atomic_inc(&clp->cl_rpc_users);
list_add(&oop->oo_perclient, collect);
}
}
/*
* Despite the fact that these functions deal with
* 64-bit integers for "count", we must ensure that
- * it doesn't blow up the clp->cl_refcount. Throw a
+ * it doesn't blow up the clp->cl_rpc_users. Throw a
* warning if we start to approach INT_MAX here.
*/
WARN_ON_ONCE(count == (INT_MAX / 2));
if (dp->dl_time != 0)
continue;
- atomic_inc(&clp->cl_refcount);
+ atomic_inc(&clp->cl_rpc_users);
WARN_ON(!unhash_delegation_locked(dp));
list_add(&dp->dl_recall_lru, victims);
}
/*
* Despite the fact that these functions deal with
* 64-bit integers for "count", we must ensure that
- * it doesn't blow up the clp->cl_refcount. Throw a
+ * it doesn't blow up the clp->cl_rpc_users. Throw a
* warning if we start to approach INT_MAX here.
*/
WARN_ON_ONCE(count == (INT_MAX / 2));
return ret;
}
-/*
- * We require the high 32 bits of 'seconds' to be 0, and
- * we ignore all 32 bits of 'nseconds'.
- */
static __be32
-nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
+nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
{
DECODE_HEAD;
- u64 sec;
READ_BUF(12);
- p = xdr_decode_hyper(p, &sec);
- tv->tv_sec = sec;
+ p = xdr_decode_hyper(p, &tv->tv_sec);
tv->tv_nsec = be32_to_cpup(p++);
if (tv->tv_nsec >= (u32)1000000000)
return nfserr_inval;
struct iattr *iattr, struct nfs4_acl **acl,
struct xdr_netobj *label, int *umask)
{
- struct timespec ts;
int expected_len, len = 0;
u32 dummy32;
char *buf;
switch (dummy32) {
case NFS4_SET_TO_CLIENT_TIME:
len += 12;
- status = nfsd4_decode_time(argp, &ts);
- iattr->ia_atime = timespec_to_timespec64(ts);
+ status = nfsd4_decode_time(argp, &iattr->ia_atime);
if (status)
return status;
iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
switch (dummy32) {
case NFS4_SET_TO_CLIENT_TIME:
len += 12;
- status = nfsd4_decode_time(argp, &ts);
- iattr->ia_mtime = timespec_to_timespec64(ts);
+ status = nfsd4_decode_time(argp, &iattr->ia_mtime);
if (status)
return status;
iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
goto xdr_error;
}
- /* Ignore Implementation ID */
READ_BUF(4); /* nfs_impl_id4 array length */
dummy = be32_to_cpup(p++);
goto xdr_error;
if (dummy == 1) {
- /* nii_domain */
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
+ status = nfsd4_decode_opaque(argp, &exid->nii_domain);
+ if (status)
+ goto xdr_error;
/* nii_name */
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
+ status = nfsd4_decode_opaque(argp, &exid->nii_name);
+ if (status)
+ goto xdr_error;
/* nii_date */
- READ_BUF(12);
- p += 3;
+ status = nfsd4_decode_time(argp, &exid->nii_time);
+ if (status)
+ goto xdr_error;
}
DECODE_TAIL;
}
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
+#include <linux/sunrpc/svc_xprt.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/sunrpc/addr.h>
spinlock_t cache_lock;
};
-static struct nfsd_drc_bucket *drc_hashtbl;
-static struct kmem_cache *drc_slab;
-
-/* max number of entries allowed in the cache */
-static unsigned int max_drc_entries;
-
-/* number of significant bits in the hash value */
-static unsigned int maskbits;
-static unsigned int drc_hashsize;
-
-/*
- * Stats and other tracking of on the duplicate reply cache. All of these and
- * the "rc" fields in nfsdstats are protected by the cache_lock
- */
-
-/* total number of entries */
-static atomic_t num_drc_entries;
-
-/* cache misses due only to checksum comparison failures */
-static unsigned int payload_misses;
-
-/* amount of memory (in bytes) currently consumed by the DRC */
-static unsigned int drc_mem_usage;
-
-/* longest hash chain seen */
-static unsigned int longest_chain;
-
-/* size of cache when we saw the longest hash chain */
-static unsigned int longest_chain_cachesize;
-
static int nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec);
static unsigned long nfsd_reply_cache_count(struct shrinker *shrink,
struct shrink_control *sc);
static unsigned long nfsd_reply_cache_scan(struct shrinker *shrink,
struct shrink_control *sc);
-static struct shrinker nfsd_reply_cache_shrinker = {
- .scan_objects = nfsd_reply_cache_scan,
- .count_objects = nfsd_reply_cache_count,
- .seeks = 1,
-};
-
/*
* Put a cap on the size of the DRC based on the amount of available
* low memory in the machine.
* ...with a hard cap of 256k entries. In the worst case, each entry will be
* ~1k, so the above numbers should give a rough max of the amount of memory
* used in k.
+ *
+ * XXX: these limits are per-container, so memory used will increase
+ * linearly with number of containers. Maybe that's OK.
*/
static unsigned int
nfsd_cache_size_limit(void)
}
static u32
-nfsd_cache_hash(__be32 xid)
+nfsd_cache_hash(__be32 xid, struct nfsd_net *nn)
{
- return hash_32(be32_to_cpu(xid), maskbits);
+ return hash_32(be32_to_cpu(xid), nn->maskbits);
}
static struct svc_cacherep *
-nfsd_reply_cache_alloc(struct svc_rqst *rqstp, __wsum csum)
+nfsd_reply_cache_alloc(struct svc_rqst *rqstp, __wsum csum,
+ struct nfsd_net *nn)
{
struct svc_cacherep *rp;
- rp = kmem_cache_alloc(drc_slab, GFP_KERNEL);
+ rp = kmem_cache_alloc(nn->drc_slab, GFP_KERNEL);
if (rp) {
rp->c_state = RC_UNUSED;
rp->c_type = RC_NOCACHE;
}
static void
-nfsd_reply_cache_free_locked(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
+nfsd_reply_cache_free_locked(struct nfsd_drc_bucket *b, struct svc_cacherep *rp,
+ struct nfsd_net *nn)
{
if (rp->c_type == RC_REPLBUFF && rp->c_replvec.iov_base) {
- drc_mem_usage -= rp->c_replvec.iov_len;
+ nn->drc_mem_usage -= rp->c_replvec.iov_len;
kfree(rp->c_replvec.iov_base);
}
if (rp->c_state != RC_UNUSED) {
rb_erase(&rp->c_node, &b->rb_head);
list_del(&rp->c_lru);
- atomic_dec(&num_drc_entries);
- drc_mem_usage -= sizeof(*rp);
+ atomic_dec(&nn->num_drc_entries);
+ nn->drc_mem_usage -= sizeof(*rp);
}
- kmem_cache_free(drc_slab, rp);
+ kmem_cache_free(nn->drc_slab, rp);
}
static void
-nfsd_reply_cache_free(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
+nfsd_reply_cache_free(struct nfsd_drc_bucket *b, struct svc_cacherep *rp,
+ struct nfsd_net *nn)
{
spin_lock(&b->cache_lock);
- nfsd_reply_cache_free_locked(b, rp);
+ nfsd_reply_cache_free_locked(b, rp, nn);
spin_unlock(&b->cache_lock);
}
-int nfsd_reply_cache_init(void)
+int nfsd_reply_cache_init(struct nfsd_net *nn)
{
unsigned int hashsize;
unsigned int i;
int status = 0;
- max_drc_entries = nfsd_cache_size_limit();
- atomic_set(&num_drc_entries, 0);
- hashsize = nfsd_hashsize(max_drc_entries);
- maskbits = ilog2(hashsize);
+ nn->max_drc_entries = nfsd_cache_size_limit();
+ atomic_set(&nn->num_drc_entries, 0);
+ hashsize = nfsd_hashsize(nn->max_drc_entries);
+ nn->maskbits = ilog2(hashsize);
- status = register_shrinker(&nfsd_reply_cache_shrinker);
+ nn->nfsd_reply_cache_shrinker.scan_objects = nfsd_reply_cache_scan;
+ nn->nfsd_reply_cache_shrinker.count_objects = nfsd_reply_cache_count;
+ nn->nfsd_reply_cache_shrinker.seeks = 1;
+ status = register_shrinker(&nn->nfsd_reply_cache_shrinker);
if (status)
- return status;
-
- drc_slab = kmem_cache_create("nfsd_drc", sizeof(struct svc_cacherep),
- 0, 0, NULL);
- if (!drc_slab)
goto out_nomem;
- drc_hashtbl = kcalloc(hashsize, sizeof(*drc_hashtbl), GFP_KERNEL);
- if (!drc_hashtbl) {
- drc_hashtbl = vzalloc(array_size(hashsize,
- sizeof(*drc_hashtbl)));
- if (!drc_hashtbl)
- goto out_nomem;
+ nn->drc_slab = kmem_cache_create("nfsd_drc",
+ sizeof(struct svc_cacherep), 0, 0, NULL);
+ if (!nn->drc_slab)
+ goto out_shrinker;
+
+ nn->drc_hashtbl = kcalloc(hashsize,
+ sizeof(*nn->drc_hashtbl), GFP_KERNEL);
+ if (!nn->drc_hashtbl) {
+ nn->drc_hashtbl = vzalloc(array_size(hashsize,
+ sizeof(*nn->drc_hashtbl)));
+ if (!nn->drc_hashtbl)
+ goto out_slab;
}
for (i = 0; i < hashsize; i++) {
- INIT_LIST_HEAD(&drc_hashtbl[i].lru_head);
- spin_lock_init(&drc_hashtbl[i].cache_lock);
+ INIT_LIST_HEAD(&nn->drc_hashtbl[i].lru_head);
+ spin_lock_init(&nn->drc_hashtbl[i].cache_lock);
}
- drc_hashsize = hashsize;
+ nn->drc_hashsize = hashsize;
return 0;
+out_slab:
+ kmem_cache_destroy(nn->drc_slab);
+out_shrinker:
+ unregister_shrinker(&nn->nfsd_reply_cache_shrinker);
out_nomem:
printk(KERN_ERR "nfsd: failed to allocate reply cache\n");
- nfsd_reply_cache_shutdown();
return -ENOMEM;
}
-void nfsd_reply_cache_shutdown(void)
+void nfsd_reply_cache_shutdown(struct nfsd_net *nn)
{
struct svc_cacherep *rp;
unsigned int i;
- unregister_shrinker(&nfsd_reply_cache_shrinker);
+ unregister_shrinker(&nn->nfsd_reply_cache_shrinker);
- for (i = 0; i < drc_hashsize; i++) {
- struct list_head *head = &drc_hashtbl[i].lru_head;
+ for (i = 0; i < nn->drc_hashsize; i++) {
+ struct list_head *head = &nn->drc_hashtbl[i].lru_head;
while (!list_empty(head)) {
rp = list_first_entry(head, struct svc_cacherep, c_lru);
- nfsd_reply_cache_free_locked(&drc_hashtbl[i], rp);
+ nfsd_reply_cache_free_locked(&nn->drc_hashtbl[i],
+ rp, nn);
}
}
- kvfree(drc_hashtbl);
- drc_hashtbl = NULL;
- drc_hashsize = 0;
+ kvfree(nn->drc_hashtbl);
+ nn->drc_hashtbl = NULL;
+ nn->drc_hashsize = 0;
- kmem_cache_destroy(drc_slab);
- drc_slab = NULL;
+ kmem_cache_destroy(nn->drc_slab);
+ nn->drc_slab = NULL;
}
/*
}
static long
-prune_bucket(struct nfsd_drc_bucket *b)
+prune_bucket(struct nfsd_drc_bucket *b, struct nfsd_net *nn)
{
struct svc_cacherep *rp, *tmp;
long freed = 0;
*/
if (rp->c_state == RC_INPROG)
continue;
- if (atomic_read(&num_drc_entries) <= max_drc_entries &&
+ if (atomic_read(&nn->num_drc_entries) <= nn->max_drc_entries &&
time_before(jiffies, rp->c_timestamp + RC_EXPIRE))
break;
- nfsd_reply_cache_free_locked(b, rp);
+ nfsd_reply_cache_free_locked(b, rp, nn);
freed++;
}
return freed;
* Also prune the oldest ones when the total exceeds the max number of entries.
*/
static long
-prune_cache_entries(void)
+prune_cache_entries(struct nfsd_net *nn)
{
unsigned int i;
long freed = 0;
- for (i = 0; i < drc_hashsize; i++) {
- struct nfsd_drc_bucket *b = &drc_hashtbl[i];
+ for (i = 0; i < nn->drc_hashsize; i++) {
+ struct nfsd_drc_bucket *b = &nn->drc_hashtbl[i];
if (list_empty(&b->lru_head))
continue;
spin_lock(&b->cache_lock);
- freed += prune_bucket(b);
+ freed += prune_bucket(b, nn);
spin_unlock(&b->cache_lock);
}
return freed;
static unsigned long
nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc)
{
- return atomic_read(&num_drc_entries);
+ struct nfsd_net *nn = container_of(shrink,
+ struct nfsd_net, nfsd_reply_cache_shrinker);
+
+ return atomic_read(&nn->num_drc_entries);
}
static unsigned long
nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
{
- return prune_cache_entries();
+ struct nfsd_net *nn = container_of(shrink,
+ struct nfsd_net, nfsd_reply_cache_shrinker);
+
+ return prune_cache_entries(nn);
}
/*
* Walk an xdr_buf and get a CRC for at most the first RC_CSUMLEN bytes
}
static int
-nfsd_cache_key_cmp(const struct svc_cacherep *key, const struct svc_cacherep *rp)
+nfsd_cache_key_cmp(const struct svc_cacherep *key,
+ const struct svc_cacherep *rp, struct nfsd_net *nn)
{
if (key->c_key.k_xid == rp->c_key.k_xid &&
key->c_key.k_csum != rp->c_key.k_csum)
- ++payload_misses;
+ ++nn->payload_misses;
return memcmp(&key->c_key, &rp->c_key, sizeof(key->c_key));
}
* inserts an empty key on failure.
*/
static struct svc_cacherep *
-nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key)
+nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key,
+ struct nfsd_net *nn)
{
struct svc_cacherep *rp, *ret = key;
struct rb_node **p = &b->rb_head.rb_node,
parent = *p;
rp = rb_entry(parent, struct svc_cacherep, c_node);
- cmp = nfsd_cache_key_cmp(key, rp);
+ cmp = nfsd_cache_key_cmp(key, rp, nn);
if (cmp < 0)
p = &parent->rb_left;
else if (cmp > 0)
rb_insert_color(&key->c_node, &b->rb_head);
out:
/* tally hash chain length stats */
- if (entries > longest_chain) {
- longest_chain = entries;
- longest_chain_cachesize = atomic_read(&num_drc_entries);
- } else if (entries == longest_chain) {
+ if (entries > nn->longest_chain) {
+ nn->longest_chain = entries;
+ nn->longest_chain_cachesize = atomic_read(&nn->num_drc_entries);
+ } else if (entries == nn->longest_chain) {
/* prefer to keep the smallest cachesize possible here */
- longest_chain_cachesize = min_t(unsigned int,
- longest_chain_cachesize,
- atomic_read(&num_drc_entries));
+ nn->longest_chain_cachesize = min_t(unsigned int,
+ nn->longest_chain_cachesize,
+ atomic_read(&nn->num_drc_entries));
}
lru_put_end(b, ret);
int
nfsd_cache_lookup(struct svc_rqst *rqstp)
{
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct svc_cacherep *rp, *found;
__be32 xid = rqstp->rq_xid;
__wsum csum;
- u32 hash = nfsd_cache_hash(xid);
- struct nfsd_drc_bucket *b = &drc_hashtbl[hash];
+ u32 hash = nfsd_cache_hash(xid, nn);
+ struct nfsd_drc_bucket *b = &nn->drc_hashtbl[hash];
int type = rqstp->rq_cachetype;
int rtn = RC_DOIT;
* Since the common case is a cache miss followed by an insert,
* preallocate an entry.
*/
- rp = nfsd_reply_cache_alloc(rqstp, csum);
+ rp = nfsd_reply_cache_alloc(rqstp, csum, nn);
if (!rp) {
dprintk("nfsd: unable to allocate DRC entry!\n");
return rtn;
}
spin_lock(&b->cache_lock);
- found = nfsd_cache_insert(b, rp);
+ found = nfsd_cache_insert(b, rp, nn);
if (found != rp) {
- nfsd_reply_cache_free_locked(NULL, rp);
+ nfsd_reply_cache_free_locked(NULL, rp, nn);
rp = found;
goto found_entry;
}
rqstp->rq_cacherep = rp;
rp->c_state = RC_INPROG;
- atomic_inc(&num_drc_entries);
- drc_mem_usage += sizeof(*rp);
+ atomic_inc(&nn->num_drc_entries);
+ nn->drc_mem_usage += sizeof(*rp);
/* go ahead and prune the cache */
- prune_bucket(b);
+ prune_bucket(b, nn);
out:
spin_unlock(&b->cache_lock);
return rtn;
break;
default:
printk(KERN_WARNING "nfsd: bad repcache type %d\n", rp->c_type);
- nfsd_reply_cache_free_locked(b, rp);
+ nfsd_reply_cache_free_locked(b, rp, nn);
}
goto out;
void
nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
{
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct svc_cacherep *rp = rqstp->rq_cacherep;
struct kvec *resv = &rqstp->rq_res.head[0], *cachv;
u32 hash;
if (!rp)
return;
- hash = nfsd_cache_hash(rp->c_key.k_xid);
- b = &drc_hashtbl[hash];
+ hash = nfsd_cache_hash(rp->c_key.k_xid, nn);
+ b = &nn->drc_hashtbl[hash];
len = resv->iov_len - ((char*)statp - (char*)resv->iov_base);
len >>= 2;
/* Don't cache excessive amounts of data and XDR failures */
if (!statp || len > (256 >> 2)) {
- nfsd_reply_cache_free(b, rp);
+ nfsd_reply_cache_free(b, rp, nn);
return;
}
bufsize = len << 2;
cachv->iov_base = kmalloc(bufsize, GFP_KERNEL);
if (!cachv->iov_base) {
- nfsd_reply_cache_free(b, rp);
+ nfsd_reply_cache_free(b, rp, nn);
return;
}
cachv->iov_len = bufsize;
memcpy(cachv->iov_base, statp, bufsize);
break;
case RC_NOCACHE:
- nfsd_reply_cache_free(b, rp);
+ nfsd_reply_cache_free(b, rp, nn);
return;
}
spin_lock(&b->cache_lock);
- drc_mem_usage += bufsize;
+ nn->drc_mem_usage += bufsize;
lru_put_end(b, rp);
rp->c_secure = test_bit(RQ_SECURE, &rqstp->rq_flags);
rp->c_type = cachetype;
*/
static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
{
- seq_printf(m, "max entries: %u\n", max_drc_entries);
+ struct nfsd_net *nn = v;
+
+ seq_printf(m, "max entries: %u\n", nn->max_drc_entries);
seq_printf(m, "num entries: %u\n",
- atomic_read(&num_drc_entries));
- seq_printf(m, "hash buckets: %u\n", 1 << maskbits);
- seq_printf(m, "mem usage: %u\n", drc_mem_usage);
+ atomic_read(&nn->num_drc_entries));
+ seq_printf(m, "hash buckets: %u\n", 1 << nn->maskbits);
+ seq_printf(m, "mem usage: %u\n", nn->drc_mem_usage);
seq_printf(m, "cache hits: %u\n", nfsdstats.rchits);
seq_printf(m, "cache misses: %u\n", nfsdstats.rcmisses);
seq_printf(m, "not cached: %u\n", nfsdstats.rcnocache);
- seq_printf(m, "payload misses: %u\n", payload_misses);
- seq_printf(m, "longest chain len: %u\n", longest_chain);
- seq_printf(m, "cachesize at longest: %u\n", longest_chain_cachesize);
+ seq_printf(m, "payload misses: %u\n", nn->payload_misses);
+ seq_printf(m, "longest chain len: %u\n", nn->longest_chain);
+ seq_printf(m, "cachesize at longest: %u\n", nn->longest_chain_cachesize);
return 0;
}
int nfsd_reply_cache_stats_open(struct inode *inode, struct file *file)
{
- return single_open(file, nfsd_reply_cache_stats_show, NULL);
+ struct nfsd_net *nn = net_generic(file_inode(file)->i_sb->s_fs_info,
+ nfsd_net_id);
+
+ return single_open(file, nfsd_reply_cache_stats_show, nn);
}
#include <linux/sunrpc/gss_krb5_enctypes.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/module.h>
+#include <linux/fsnotify.h>
#include "idmap.h"
#include "nfsd.h"
NFSD_RecoveryDir,
NFSD_V4EndGrace,
#endif
+ NFSD_MaxReserved
};
/*
* populating the filesystem.
*/
+/* Basically copying rpc_get_inode. */
+static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode)
+{
+ struct inode *inode = new_inode(sb);
+ if (!inode)
+ return NULL;
+ /* Following advice from simple_fill_super documentation: */
+ inode->i_ino = iunique(sb, NFSD_MaxReserved);
+ inode->i_mode = mode;
+ inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
+ switch (mode & S_IFMT) {
+ case S_IFDIR:
+ inode->i_fop = &simple_dir_operations;
+ inode->i_op = &simple_dir_inode_operations;
+ inc_nlink(inode);
+ default:
+ break;
+ }
+ return inode;
+}
+
+static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode *inode;
+
+ inode = nfsd_get_inode(dir->i_sb, mode);
+ if (!inode)
+ return -ENOMEM;
+ d_add(dentry, inode);
+ inc_nlink(dir);
+ fsnotify_mkdir(dir, dentry);
+ return 0;
+}
+
+static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name)
+{
+ struct inode *dir = parent->d_inode;
+ struct dentry *dentry;
+ int ret = -ENOMEM;
+
+ inode_lock(dir);
+ dentry = d_alloc_name(parent, name);
+ if (!dentry)
+ goto out_err;
+ ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600);
+ if (ret)
+ goto out_err;
+ if (ncl) {
+ d_inode(dentry)->i_private = ncl;
+ kref_get(&ncl->cl_ref);
+ }
+out:
+ inode_unlock(dir);
+ return dentry;
+out_err:
+ dentry = ERR_PTR(ret);
+ goto out;
+}
+
+static void clear_ncl(struct inode *inode)
+{
+ struct nfsdfs_client *ncl = inode->i_private;
+
+ inode->i_private = NULL;
+ synchronize_rcu();
+ kref_put(&ncl->cl_ref, ncl->cl_release);
+}
+
+
+static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode)
+{
+ struct nfsdfs_client *nc = inode->i_private;
+
+ if (nc)
+ kref_get(&nc->cl_ref);
+ return nc;
+}
+
+struct nfsdfs_client *get_nfsdfs_client(struct inode *inode)
+{
+ struct nfsdfs_client *nc;
+
+ rcu_read_lock();
+ nc = __get_nfsdfs_client(inode);
+ rcu_read_unlock();
+ return nc;
+}
+/* from __rpc_unlink */
+static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry)
+{
+ int ret;
+
+ clear_ncl(d_inode(dentry));
+ dget(dentry);
+ ret = simple_unlink(dir, dentry);
+ d_delete(dentry);
+ dput(dentry);
+ WARN_ON_ONCE(ret);
+}
+
+static void nfsdfs_remove_files(struct dentry *root)
+{
+ struct dentry *dentry, *tmp;
+
+ list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) {
+ if (!simple_positive(dentry)) {
+ WARN_ON_ONCE(1); /* I think this can't happen? */
+ continue;
+ }
+ nfsdfs_remove_file(d_inode(root), dentry);
+ }
+}
+
+/* XXX: cut'n'paste from simple_fill_super; figure out if we could share
+ * code instead. */
+static int nfsdfs_create_files(struct dentry *root,
+ const struct tree_descr *files)
+{
+ struct inode *dir = d_inode(root);
+ struct inode *inode;
+ struct dentry *dentry;
+ int i;
+
+ inode_lock(dir);
+ for (i = 0; files->name && files->name[0]; i++, files++) {
+ if (!files->name)
+ continue;
+ dentry = d_alloc_name(root, files->name);
+ if (!dentry)
+ goto out;
+ inode = nfsd_get_inode(d_inode(root)->i_sb,
+ S_IFREG | files->mode);
+ if (!inode) {
+ dput(dentry);
+ goto out;
+ }
+ inode->i_fop = files->ops;
+ inode->i_private = __get_nfsdfs_client(dir);
+ d_add(dentry, inode);
+ fsnotify_create(dir, dentry);
+ }
+ inode_unlock(dir);
+ return 0;
+out:
+ nfsdfs_remove_files(root);
+ inode_unlock(dir);
+ return -ENOMEM;
+}
+
+/* on success, returns positive number unique to that client. */
+struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
+ struct nfsdfs_client *ncl, u32 id,
+ const struct tree_descr *files)
+{
+ struct dentry *dentry;
+ char name[11];
+ int ret;
+
+ sprintf(name, "%u", id);
+
+ dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name);
+ if (IS_ERR(dentry)) /* XXX: tossing errors? */
+ return NULL;
+ ret = nfsdfs_create_files(dentry, files);
+ if (ret) {
+ nfsd_client_rmdir(dentry);
+ return NULL;
+ }
+ return dentry;
+}
+
+/* Taken from __rpc_rmdir: */
+void nfsd_client_rmdir(struct dentry *dentry)
+{
+ struct inode *dir = d_inode(dentry->d_parent);
+ struct inode *inode = d_inode(dentry);
+ int ret;
+
+ inode_lock(dir);
+ nfsdfs_remove_files(dentry);
+ clear_ncl(inode);
+ dget(dentry);
+ ret = simple_rmdir(dir, dentry);
+ WARN_ON_ONCE(ret);
+ d_delete(dentry);
+ inode_unlock(dir);
+}
+
static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
{
+ struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
+ nfsd_net_id);
+ struct dentry *dentry;
+ int ret;
+
static const struct tree_descr nfsd_files[] = {
[NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO},
[NFSD_Export_features] = {"export_features",
/* last one */ {""}
};
get_net(sb->s_fs_info);
- return simple_fill_super(sb, 0x6e667364, nfsd_files);
+ ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+ if (ret)
+ return ret;
+ dentry = nfsd_mkdir(sb->s_root, NULL, "clients");
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+ nn->nfsd_client_dir = dentry;
+ return 0;
+
}
static struct dentry *nfsd_mount(struct file_system_type *fs_type,
static __net_init int nfsd_init_net(struct net *net)
{
int retval;
+ struct vfsmount *mnt;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
retval = nfsd_export_init(net);
goto out_idmap_error;
nn->nfsd_versions = NULL;
nn->nfsd4_minorversions = NULL;
+ retval = nfsd_reply_cache_init(nn);
+ if (retval)
+ goto out_drc_error;
nn->nfsd4_lease = 90; /* default lease time */
nn->nfsd4_grace = 90;
nn->somebody_reclaimed = false;
nn->track_reclaim_completes = false;
nn->clverifier_counter = prandom_u32();
- nn->clientid_counter = prandom_u32();
+ nn->clientid_base = prandom_u32();
+ nn->clientid_counter = nn->clientid_base + 1;
nn->s2s_cp_cl_id = nn->clientid_counter++;
atomic_set(&nn->ntf_refcnt, 0);
init_waitqueue_head(&nn->ntf_wq);
+
+ mnt = vfs_kern_mount(&nfsd_fs_type, SB_KERNMOUNT, "nfsd", NULL);
+ if (IS_ERR(mnt)) {
+ retval = PTR_ERR(mnt);
+ goto out_mount_err;
+ }
+ nn->nfsd_mnt = mnt;
return 0;
+out_mount_err:
+ nfsd_reply_cache_shutdown(nn);
+out_drc_error:
+ nfsd_idmap_shutdown(net);
out_idmap_error:
nfsd_export_shutdown(net);
out_export_error:
static __net_exit void nfsd_exit_net(struct net *net)
{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ mntput(nn->nfsd_mnt);
+ nfsd_reply_cache_shutdown(nn);
nfsd_idmap_shutdown(net);
nfsd_export_shutdown(net);
nfsd_netns_free_versions(net_generic(net, nfsd_net_id));
if (retval)
goto out_exit_pnfs;
nfsd_stat_init(); /* Statistics */
- retval = nfsd_reply_cache_init();
- if (retval)
- goto out_free_stat;
nfsd_lockd_init(); /* lockd->nfsd callbacks */
retval = create_proc_exports_entry();
if (retval)
remove_proc_entry("fs/nfs", NULL);
out_free_lockd:
nfsd_lockd_shutdown();
- nfsd_reply_cache_shutdown();
-out_free_stat:
nfsd_stat_shutdown();
nfsd_fault_inject_cleanup();
out_exit_pnfs:
static void __exit exit_nfsd(void)
{
- nfsd_reply_cache_shutdown();
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
nfsd_stat_shutdown();
#include <uapi/linux/nfsd/debug.h>
+#include "netns.h"
#include "stats.h"
#include "export.h"
void nfsd_destroy(struct net *net);
+struct nfsdfs_client {
+ struct kref cl_ref;
+ void (*cl_release)(struct kref *kref);
+};
+
+struct nfsdfs_client *get_nfsdfs_client(struct inode *);
+struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
+ struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
+void nfsd_client_rmdir(struct dentry *dentry);
+
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
#ifdef CONFIG_NFSD_V2_ACL
extern const struct svc_version nfsd_acl_version2;
#include <linux/refcount.h>
#include <linux/sunrpc/svc_xprt.h>
#include "nfsfh.h"
+#include "nfsd.h"
typedef struct {
u32 cl_boot;
clientid_t cl_clientid; /* generated by server */
nfs4_verifier cl_confirm; /* generated by server */
u32 cl_minorversion;
+ /* NFSv4.1 client implementation id: */
+ struct xdr_netobj cl_nii_domain;
+ struct xdr_netobj cl_nii_name;
+ struct timespec cl_nii_time;
/* for v4.0 and v4.1 callbacks: */
struct nfs4_cb_conn cl_cb_conn;
struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
u32 cl_exchange_flags;
/* number of rpc's in progress over an associated session: */
- atomic_t cl_refcount;
+ atomic_t cl_rpc_users;
+ struct nfsdfs_client cl_nfsdfs;
struct nfs4_op_map cl_spo_must_allow;
+ /* debugging info directory under nfsd/clients/ : */
+ struct dentry *cl_nfsd_dentry;
+
/* for nfs41 callbacks */
/* We currently support a single back channel with a single slot */
unsigned long cl_cb_slot_busy;
/*
* If utimes(2) and friends are called with times not NULL, we should
* not set NFSD_MAY_WRITE bit. Otherwise fh_verify->nfsd_permission
- * will return EACCESS, when the caller's effective UID does not match
+ * will return EACCES, when the caller's effective UID does not match
* the owner of the file, and the caller is not privileged. In this
* situation, we should return EPERM(notify_change will return this).
*/
int spa_how;
u32 spo_must_enforce[3];
u32 spo_must_allow[3];
+ struct xdr_netobj nii_domain;
+ struct xdr_netobj nii_name;
+ struct timespec64 nii_time;
};
struct nfsd4_sequence {
u32 lc_reclaim; /* request */
u32 lc_newoffset; /* request */
u64 lc_last_wr; /* request */
- struct timespec lc_mtime; /* request */
+ struct timespec64 lc_mtime; /* request */
u32 lc_layout_type; /* request */
u32 lc_up_len; /* layout length */
void *lc_up_layout; /* decoded by callback */
}
EXPORT_SYMBOL(seq_escape);
+void seq_escape_mem_ascii(struct seq_file *m, const char *src, size_t isz)
+{
+ char *buf;
+ size_t size = seq_get_buf(m, &buf);
+ int ret;
+
+ ret = string_escape_mem_ascii(src, isz, buf, size);
+ seq_commit(m, ret < size ? ret : -1);
+}
+EXPORT_SYMBOL(seq_escape_mem_ascii);
+
void seq_vprintf(struct seq_file *m, const char *f, va_list args)
{
int len;
};
struct lock_manager_operations {
- int (*lm_compare_owner)(struct file_lock *, struct file_lock *);
- unsigned long (*lm_owner_key)(struct file_lock *);
fl_owner_t (*lm_get_owner)(fl_owner_t);
void (*lm_put_owner)(fl_owner_t);
void (*lm_notify)(struct file_lock *); /* unblock callback */
nlm_host_match_fn_t match);
void nlmsvc_grant_reply(struct nlm_cookie *, __be32);
void nlmsvc_release_call(struct nlm_rqst *);
+void nlmsvc_locks_init_private(struct file_lock *, struct nlm_host *, pid_t);
/*
* File handling for the server personality
__be32 nlm_lookup_file(struct svc_rqst *, struct nlm_file **,
struct nfs_fh *);
void nlm_release_file(struct nlm_file *);
+void nlmsvc_release_lockowner(struct nlm_lock *);
void nlmsvc_mark_resources(struct net *);
void nlmsvc_free_host_resources(struct nlm_host *);
void nlmsvc_invalidate_all(void);
unsigned long long v, unsigned int width);
void seq_escape(struct seq_file *m, const char *s, const char *esc);
+void seq_escape_mem_ascii(struct seq_file *m, const char *src, size_t isz);
void seq_hex_dump(struct seq_file *m, const char *prefix_str, int prefix_type,
int rowsize, int groupsize, const void *buf, size_t len,
int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,
unsigned int flags, const char *only);
+int string_escape_mem_ascii(const char *src, size_t isz, char *dst,
+ size_t osz);
+
static inline int string_escape_mem_any_np(const char *src, size_t isz,
char *dst, size_t osz, const char *only)
{
return p + XDR_QUADLEN(len);
}
+static inline void xdr_netobj_dup(struct xdr_netobj *dst,
+ struct xdr_netobj *src, gfp_t gfp_mask)
+{
+ dst->data = kmemdup(src->data, src->len, gfp_mask);
+ dst->len = src->len;
+}
+
/*
* Adjust kvec to reflect end of xdr'ed data (RPC client XDR)
*/
}
EXPORT_SYMBOL(string_escape_mem);
+int string_escape_mem_ascii(const char *src, size_t isz, char *dst,
+ size_t osz)
+{
+ char *p = dst;
+ char *end = p + osz;
+
+ while (isz--) {
+ unsigned char c = *src++;
+
+ if (!isprint(c) || !isascii(c) || c == '"' || c == '\\')
+ escape_hex(c, &p, end);
+ else
+ escape_passthrough(c, &p, end);
+ }
+
+ return p - dst;
+}
+EXPORT_SYMBOL(string_escape_mem_ascii);
+
/*
* Return an allocated string that has been escaped of special characters
* and double quotes, making it safe to log in quotes.
hlist_first_rcu(&cd->hash_table[hash])),
struct cache_head, cache_list);
}
-EXPORT_SYMBOL_GPL(cache_seq_next);
void *cache_seq_start_rcu(struct seq_file *m, loff_t *pos)
__acquires(RCU)
/* apparently the "standard" is that clients close
* idle connections after 5 minutes, servers after
* 6 minutes
- * http://www.connectathon.org/talks96/nfstcp.pdf
+ * http://nfsv4bat.org/Documents/ConnectAThon/1996/nfstcp.pdf
*/
static int svc_conn_age_period = 6*60;
projects / platform / kernel / linux-starfive.git / commitdiff