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-rw-r--r--fs/Kconfig6
-rw-r--r--fs/lockd/Makefile3
-rw-r--r--fs/lockd/netns.h1
-rw-r--r--fs/lockd/procfs.c92
-rw-r--r--fs/lockd/procfs.h28
-rw-r--r--fs/lockd/svc.c16
-rw-r--r--fs/nfs/callback.c4
-rw-r--r--fs/nfs_common/Makefile3
-rw-r--r--fs/nfs_common/grace.c (renamed from fs/lockd/grace.c)68
-rw-r--r--fs/nfsd/Kconfig4
-rw-r--r--fs/nfsd/cache.h1
-rw-r--r--fs/nfsd/export.c1
-rw-r--r--fs/nfsd/nfs3proc.c13
-rw-r--r--fs/nfsd/nfs4callback.c145
-rw-r--r--fs/nfsd/nfs4idmap.c20
-rw-r--r--fs/nfsd/nfs4proc.c49
-rw-r--r--fs/nfsd/nfs4recover.c205
-rw-r--r--fs/nfsd/nfs4state.c118
-rw-r--r--fs/nfsd/nfs4xdr.c75
-rw-r--r--fs/nfsd/nfscache.c214
-rw-r--r--fs/nfsd/nfsctl.c45
-rw-r--r--fs/nfsd/nfsd.h2
-rw-r--r--fs/nfsd/nfsfh.c6
-rw-r--r--fs/nfsd/state.h28
-rw-r--r--fs/nfsd/vfs.c37
-rw-r--r--fs/nfsd/xdr4.h14
26 files changed, 868 insertions, 330 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index 312393f32948..db5dc1598716 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -233,9 +233,13 @@ if NETWORK_FILESYSTEMS
source "fs/nfs/Kconfig"
source "fs/nfsd/Kconfig"
+config GRACE_PERIOD
+ tristate
+
config LOCKD
tristate
depends on FILE_LOCKING
+ select GRACE_PERIOD
config LOCKD_V4
bool
@@ -249,7 +253,7 @@ config NFS_ACL_SUPPORT
config NFS_COMMON
bool
- depends on NFSD || NFS_FS
+ depends on NFSD || NFS_FS || LOCKD
default y
source "net/sunrpc/Kconfig"
diff --git a/fs/lockd/Makefile b/fs/lockd/Makefile
index ca58d64374ca..9b320cc2a8cf 100644
--- a/fs/lockd/Makefile
+++ b/fs/lockd/Makefile
@@ -5,6 +5,7 @@
obj-$(CONFIG_LOCKD) += lockd.o
lockd-objs-y := clntlock.o clntproc.o clntxdr.o host.o svc.o svclock.o \
- svcshare.o svcproc.o svcsubs.o mon.o xdr.o grace.o
+ svcshare.o svcproc.o svcsubs.o mon.o xdr.o
lockd-objs-$(CONFIG_LOCKD_V4) += clnt4xdr.o xdr4.o svc4proc.o
+lockd-objs-$(CONFIG_PROC_FS) += procfs.o
lockd-objs := $(lockd-objs-y)
diff --git a/fs/lockd/netns.h b/fs/lockd/netns.h
index 5010b55628b4..097bfa3adb1c 100644
--- a/fs/lockd/netns.h
+++ b/fs/lockd/netns.h
@@ -11,7 +11,6 @@ struct lockd_net {
struct delayed_work grace_period_end;
struct lock_manager lockd_manager;
- struct list_head grace_list;
spinlock_t nsm_clnt_lock;
unsigned int nsm_users;
diff --git a/fs/lockd/procfs.c b/fs/lockd/procfs.c
new file mode 100644
index 000000000000..2a0a98480e39
--- /dev/null
+++ b/fs/lockd/procfs.c
@@ -0,0 +1,92 @@
+/*
+ * Procfs support for lockd
+ *
+ * Copyright (c) 2014 Jeff Layton <jlayton@primarydata.com>
+ */
+
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/module.h>
+#include <linux/nsproxy.h>
+#include <net/net_namespace.h>
+
+#include "netns.h"
+#include "procfs.h"
+
+/*
+ * We only allow strings that start with 'Y', 'y', or '1'.
+ */
+static ssize_t
+nlm_end_grace_write(struct file *file, const char __user *buf, size_t size,
+ loff_t *pos)
+{
+ char *data;
+ struct lockd_net *ln = net_generic(current->nsproxy->net_ns,
+ lockd_net_id);
+
+ if (size < 1)
+ return -EINVAL;
+
+ data = simple_transaction_get(file, buf, size);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ switch(data[0]) {
+ case 'Y':
+ case 'y':
+ case '1':
+ locks_end_grace(&ln->lockd_manager);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return size;
+}
+
+static ssize_t
+nlm_end_grace_read(struct file *file, char __user *buf, size_t size,
+ loff_t *pos)
+{
+ struct lockd_net *ln = net_generic(current->nsproxy->net_ns,
+ lockd_net_id);
+ char resp[3];
+
+ resp[0] = list_empty(&ln->lockd_manager.list) ? 'Y' : 'N';
+ resp[1] = '\n';
+ resp[2] = '\0';
+
+ return simple_read_from_buffer(buf, size, pos, resp, sizeof(resp));
+}
+
+static const struct file_operations lockd_end_grace_operations = {
+ .write = nlm_end_grace_write,
+ .read = nlm_end_grace_read,
+ .llseek = default_llseek,
+ .release = simple_transaction_release,
+ .owner = THIS_MODULE,
+};
+
+int __init
+lockd_create_procfs(void)
+{
+ struct proc_dir_entry *entry;
+
+ entry = proc_mkdir("fs/lockd", NULL);
+ if (!entry)
+ return -ENOMEM;
+ entry = proc_create("nlm_end_grace", S_IRUGO|S_IWUSR, entry,
+ &lockd_end_grace_operations);
+ if (!entry) {
+ remove_proc_entry("fs/lockd", NULL);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void __exit
+lockd_remove_procfs(void)
+{
+ remove_proc_entry("fs/lockd/nlm_end_grace", NULL);
+ remove_proc_entry("fs/lockd", NULL);
+}
diff --git a/fs/lockd/procfs.h b/fs/lockd/procfs.h
new file mode 100644
index 000000000000..2257a1311027
--- /dev/null
+++ b/fs/lockd/procfs.h
@@ -0,0 +1,28 @@
+/*
+ * Procfs support for lockd
+ *
+ * Copyright (c) 2014 Jeff Layton <jlayton@primarydata.com>
+ */
+#ifndef _LOCKD_PROCFS_H
+#define _LOCKD_PROCFS_H
+
+#include <linux/kconfig.h>
+
+#if IS_ENABLED(CONFIG_PROC_FS)
+int lockd_create_procfs(void);
+void lockd_remove_procfs(void);
+#else
+static inline int
+lockd_create_procfs(void)
+{
+ return 0;
+}
+
+static inline void
+lockd_remove_procfs(void)
+{
+ return;
+}
+#endif /* IS_ENABLED(CONFIG_PROC_FS) */
+
+#endif /* _LOCKD_PROCFS_H */
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 8f27c93f8d2e..8146cfe97d8d 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -36,6 +36,7 @@
#include <linux/nfs.h>
#include "netns.h"
+#include "procfs.h"
#define NLMDBG_FACILITY NLMDBG_SVC
#define LOCKD_BUFSIZE (1024 + NLMSVC_XDRSIZE)
@@ -306,13 +307,16 @@ static int lockd_start_svc(struct svc_serv *serv)
svc_sock_update_bufs(serv);
serv->sv_maxconn = nlm_max_connections;
- nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, "%s", serv->sv_name);
+ nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name);
if (IS_ERR(nlmsvc_task)) {
error = PTR_ERR(nlmsvc_task);
printk(KERN_WARNING
"lockd_up: kthread_run failed, error=%d\n", error);
goto out_task;
}
+ nlmsvc_rqst->rq_task = nlmsvc_task;
+ wake_up_process(nlmsvc_task);
+
dprintk("lockd_up: service started\n");
return 0;
@@ -583,7 +587,7 @@ static int lockd_init_net(struct net *net)
struct lockd_net *ln = net_generic(net, lockd_net_id);
INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender);
- INIT_LIST_HEAD(&ln->grace_list);
+ INIT_LIST_HEAD(&ln->lockd_manager.list);
spin_lock_init(&ln->nsm_clnt_lock);
return 0;
}
@@ -617,8 +621,15 @@ static int __init init_nlm(void)
err = register_pernet_subsys(&lockd_net_ops);
if (err)
goto err_pernet;
+
+ err = lockd_create_procfs();
+ if (err)
+ goto err_procfs;
+
return 0;
+err_procfs:
+ unregister_pernet_subsys(&lockd_net_ops);
err_pernet:
#ifdef CONFIG_SYSCTL
unregister_sysctl_table(nlm_sysctl_table);
@@ -631,6 +642,7 @@ static void __exit exit_nlm(void)
{
/* FIXME: delete all NLM clients */
nlm_shutdown_hosts();
+ lockd_remove_procfs();
unregister_pernet_subsys(&lockd_net_ops);
#ifdef CONFIG_SYSCTL
unregister_sysctl_table(nlm_sysctl_table);
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 54de482143cc..b8fb3a4ef649 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -235,7 +235,7 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
cb_info->serv = serv;
cb_info->rqst = rqstp;
- cb_info->task = kthread_run(callback_svc, cb_info->rqst,
+ cb_info->task = kthread_create(callback_svc, cb_info->rqst,
"nfsv4.%u-svc", minorversion);
if (IS_ERR(cb_info->task)) {
ret = PTR_ERR(cb_info->task);
@@ -244,6 +244,8 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
cb_info->task = NULL;
return ret;
}
+ rqstp->rq_task = cb_info->task;
+ wake_up_process(cb_info->task);
dprintk("nfs_callback_up: service started\n");
return 0;
}
diff --git a/fs/nfs_common/Makefile b/fs/nfs_common/Makefile
index f689ed82af3a..d153ca3ea577 100644
--- a/fs/nfs_common/Makefile
+++ b/fs/nfs_common/Makefile
@@ -3,5 +3,6 @@
#
obj-$(CONFIG_NFS_ACL_SUPPORT) += nfs_acl.o
-
nfs_acl-objs := nfsacl.o
+
+obj-$(CONFIG_GRACE_PERIOD) += grace.o
diff --git a/fs/lockd/grace.c b/fs/nfs_common/grace.c
index 6d1ee7204c88..ae6e58ea4de5 100644
--- a/fs/lockd/grace.c
+++ b/fs/nfs_common/grace.c
@@ -1,17 +1,20 @@
/*
* Common code for control of lockd and nfsv4 grace periods.
+ *
+ * Transplanted from lockd code
*/
#include <linux/module.h>
-#include <linux/lockd/bind.h>
#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <linux/fs.h>
-#include "netns.h"
-
+static int grace_net_id;
static DEFINE_SPINLOCK(grace_lock);
/**
* locks_start_grace
+ * @net: net namespace that this lock manager belongs to
* @lm: who this grace period is for
*
* A grace period is a period during which locks should not be given
@@ -21,18 +24,20 @@ static DEFINE_SPINLOCK(grace_lock);
*
* This function is called to start a grace period.
*/
-void locks_start_grace(struct net *net, struct lock_manager *lm)
+void
+locks_start_grace(struct net *net, struct lock_manager *lm)
{
- struct lockd_net *ln = net_generic(net, lockd_net_id);
+ struct list_head *grace_list = net_generic(net, grace_net_id);
spin_lock(&grace_lock);
- list_add(&lm->list, &ln->grace_list);
+ list_add(&lm->list, grace_list);
spin_unlock(&grace_lock);
}
EXPORT_SYMBOL_GPL(locks_start_grace);
/**
* locks_end_grace
+ * @net: net namespace that this lock manager belongs to
* @lm: who this grace period is for
*
* Call this function to state that the given lock manager is ready to
@@ -41,7 +46,8 @@ EXPORT_SYMBOL_GPL(locks_start_grace);
* Note that callers count on it being safe to call this more than once,
* and the second call should be a no-op.
*/
-void locks_end_grace(struct lock_manager *lm)
+void
+locks_end_grace(struct lock_manager *lm)
{
spin_lock(&grace_lock);
list_del_init(&lm->list);
@@ -56,10 +62,52 @@ EXPORT_SYMBOL_GPL(locks_end_grace);
* to answer ordinary lock requests, and when they should accept only
* lock reclaims.
*/
-int locks_in_grace(struct net *net)
+int
+locks_in_grace(struct net *net)
{
- struct lockd_net *ln = net_generic(net, lockd_net_id);
+ struct list_head *grace_list = net_generic(net, grace_net_id);
- return !list_empty(&ln->grace_list);
+ return !list_empty(grace_list);
}
EXPORT_SYMBOL_GPL(locks_in_grace);
+
+static int __net_init
+grace_init_net(struct net *net)
+{
+ struct list_head *grace_list = net_generic(net, grace_net_id);
+
+ INIT_LIST_HEAD(grace_list);
+ return 0;
+}
+
+static void __net_exit
+grace_exit_net(struct net *net)
+{
+ struct list_head *grace_list = net_generic(net, grace_net_id);
+
+ BUG_ON(!list_empty(grace_list));
+}
+
+static struct pernet_operations grace_net_ops = {
+ .init = grace_init_net,
+ .exit = grace_exit_net,
+ .id = &grace_net_id,
+ .size = sizeof(struct list_head),
+};
+
+static int __init
+init_grace(void)
+{
+ return register_pernet_subsys(&grace_net_ops);
+}
+
+static void __exit
+exit_grace(void)
+{
+ unregister_pernet_subsys(&grace_net_ops);
+}
+
+MODULE_AUTHOR("Jeff Layton <jlayton@primarydata.com>");
+MODULE_LICENSE("GPL");
+module_init(init_grace)
+module_exit(exit_grace)
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index f994e750e0d1..73395156bdb4 100644
--- a/fs/nfsd/Kconfig
+++ b/fs/nfsd/Kconfig
@@ -71,6 +71,7 @@ config NFSD_V4
select FS_POSIX_ACL
select SUNRPC_GSS
select CRYPTO
+ select GRACE_PERIOD
help
This option enables support in your system's NFS server for
version 4 of the NFS protocol (RFC 3530).
@@ -94,9 +95,6 @@ config NFSD_V4_SECURITY_LABEL
If you do not wish to enable fine-grained security labels SELinux or
Smack policies on NFSv4 files, say N.
- WARNING: there is still a chance of backwards-incompatible protocol changes.
- For now we recommend "Y" only for developers and testers.
-
config NFSD_FAULT_INJECTION
bool "NFS server manual fault injection"
depends on NFSD_V4 && DEBUG_KERNEL
diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h
index b582f9ab6b2a..dd96a3830004 100644
--- a/fs/nfsd/cache.h
+++ b/fs/nfsd/cache.h
@@ -18,7 +18,6 @@
* is much larger than a sockaddr_in6.
*/
struct svc_cacherep {
- struct hlist_node c_hash;
struct list_head c_lru;
unsigned char c_state, /* unused, inprog, done */
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 72ffd7cce3c3..30a739d896ff 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1145,6 +1145,7 @@ static struct flags {
{ NFSEXP_ALLSQUASH, {"all_squash", ""}},
{ NFSEXP_ASYNC, {"async", "sync"}},
{ NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}},
+ { NFSEXP_NOREADDIRPLUS, {"nordirplus", ""}},
{ NFSEXP_NOHIDE, {"nohide", ""}},
{ NFSEXP_CROSSMOUNT, {"crossmnt", ""}},
{ NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}},
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index fa2525b2e9d7..12f2aab4f614 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -223,11 +223,6 @@ nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
attr = &argp->attrs;
- /* Get the directory inode */
- nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_CREATE);
- if (nfserr)
- RETURN_STATUS(nfserr);
-
/* Unfudge the mode bits */
attr->ia_mode &= ~S_IFMT;
if (!(attr->ia_valid & ATTR_MODE)) {
@@ -471,6 +466,14 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
resp->buflen = resp->count;
resp->rqstp = rqstp;
offset = argp->cookie;
+
+ nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
+ if (nfserr)
+ RETURN_STATUS(nfserr);
+
+ if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS)
+ RETURN_STATUS(nfserr_notsupp);
+
nfserr = nfsd_readdir(rqstp, &resp->fh,
&offset,
&resp->common,
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index e0be57b0f79b..4fe4be1ee82e 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -49,11 +49,8 @@ static void nfsd4_mark_cb_fault(struct nfs4_client *, int reason);
/* Index of predefined Linux callback client operations */
-enum {
- NFSPROC4_CLNT_CB_NULL = 0,
- NFSPROC4_CLNT_CB_RECALL,
- NFSPROC4_CLNT_CB_SEQUENCE,
-};
+#define to_delegation(cb) \
+ container_of(cb, struct nfs4_delegation, dl_recall)
struct nfs4_cb_compound_hdr {
/* args */
@@ -494,7 +491,7 @@ static void nfs4_xdr_enc_cb_null(struct rpc_rqst *req, struct xdr_stream *xdr,
static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfsd4_callback *cb)
{
- const struct nfs4_delegation *args = cb->cb_op;
+ const struct nfs4_delegation *dp = to_delegation(cb);
struct nfs4_cb_compound_hdr hdr = {
.ident = cb->cb_clp->cl_cb_ident,
.minorversion = cb->cb_minorversion,
@@ -502,7 +499,7 @@ static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr,
encode_cb_compound4args(xdr, &hdr);
encode_cb_sequence4args(xdr, cb, &hdr);
- encode_cb_recall4args(xdr, args, &hdr);
+ encode_cb_recall4args(xdr, dp, &hdr);
encode_cb_nops(&hdr);
}
@@ -746,27 +743,6 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = {
static struct workqueue_struct *callback_wq;
-static void run_nfsd4_cb(struct nfsd4_callback *cb)
-{
- queue_work(callback_wq, &cb->cb_work);
-}
-
-static void do_probe_callback(struct nfs4_client *clp)
-{
- struct nfsd4_callback *cb = &clp->cl_cb_null;
-
- cb->cb_op = NULL;
- cb->cb_clp = clp;
-
- cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL];
- cb->cb_msg.rpc_argp = NULL;
- cb->cb_msg.rpc_resp = NULL;
-
- cb->cb_ops = &nfsd4_cb_probe_ops;
-
- run_nfsd4_cb(cb);
-}
-
/*
* Poke the callback thread to process any updates to the callback
* parameters, and send a null probe.
@@ -775,7 +751,7 @@ void nfsd4_probe_callback(struct nfs4_client *clp)
{
clp->cl_cb_state = NFSD4_CB_UNKNOWN;
set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
- do_probe_callback(clp);
+ nfsd4_run_cb(&clp->cl_cb_null);
}
void nfsd4_probe_callback_sync(struct nfs4_client *clp)
@@ -847,23 +823,9 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
rpc_wake_up_next(&clp->cl_cb_waitq);
dprintk("%s: freed slot, new seqid=%d\n", __func__,
clp->cl_cb_session->se_cb_seq_nr);
-
- /* We're done looking into the sequence information */
- task->tk_msg.rpc_resp = NULL;
}
-}
-
-
-static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
-{
- struct nfsd4_callback *cb = calldata;
- struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
- struct nfs4_client *clp = cb->cb_clp;
- struct rpc_clnt *current_rpc_client = clp->cl_cb_client;
-
- nfsd4_cb_done(task, calldata);
- if (current_rpc_client != task->tk_client) {
+ if (clp->cl_cb_client != task->tk_client) {
/* We're shutting down or changing cl_cb_client; leave
* it to nfsd4_process_cb_update to restart the call if
* necessary. */
@@ -872,47 +834,42 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
if (cb->cb_done)
return;
- switch (task->tk_status) {
+
+ switch (cb->cb_ops->done(cb, task)) {
case 0:
- cb->cb_done = true;
+ task->tk_status = 0;
+ rpc_restart_call_prepare(task);
return;
- case -EBADHANDLE:
- case -NFS4ERR_BAD_STATEID:
- /* Race: client probably got cb_recall
- * before open reply granting delegation */
+ case 1:
break;
- default:
+ case -1:
/* Network partition? */
nfsd4_mark_cb_down(clp, task->tk_status);
+ break;
+ default:
+ BUG();
}
- if (dp->dl_retries--) {
- rpc_delay(task, 2*HZ);
- task->tk_status = 0;
- rpc_restart_call_prepare(task);
- return;
- }
- nfsd4_mark_cb_down(clp, task->tk_status);
cb->cb_done = true;
}
-static void nfsd4_cb_recall_release(void *calldata)
+static void nfsd4_cb_release(void *calldata)
{
struct nfsd4_callback *cb = calldata;
struct nfs4_client *clp = cb->cb_clp;
- struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
if (cb->cb_done) {
spin_lock(&clp->cl_lock);
list_del(&cb->cb_per_client);
spin_unlock(&clp->cl_lock);
- nfs4_put_stid(&dp->dl_stid);
+
+ cb->cb_ops->release(cb);
}
}
-static const struct rpc_call_ops nfsd4_cb_recall_ops = {
+static const struct rpc_call_ops nfsd4_cb_ops = {
.rpc_call_prepare = nfsd4_cb_prepare,
- .rpc_call_done = nfsd4_cb_recall_done,
- .rpc_release = nfsd4_cb_recall_release,
+ .rpc_call_done = nfsd4_cb_done,
+ .rpc_release = nfsd4_cb_release,
};
int nfsd4_create_callback_queue(void)
@@ -937,16 +894,10 @@ void nfsd4_shutdown_callback(struct nfs4_client *clp)
* instead, nfsd4_run_cb_null() will detect the killed
* client, destroy the rpc client, and stop:
*/
- do_probe_callback(clp);
+ nfsd4_run_cb(&clp->cl_cb_null);
flush_workqueue(callback_wq);
}
-static void nfsd4_release_cb(struct nfsd4_callback *cb)
-{
- if (cb->cb_ops->rpc_release)
- cb->cb_ops->rpc_release(cb);
-}
-
/* requires cl_lock: */
static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp)
{
@@ -1009,63 +960,49 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
}
/* Yay, the callback channel's back! Restart any callbacks: */
list_for_each_entry(cb, &clp->cl_callbacks, cb_per_client)
- run_nfsd4_cb(cb);
+ queue_work(callback_wq, &cb->cb_work);
}
static void
-nfsd4_run_callback_rpc(struct nfsd4_callback *cb)
+nfsd4_run_cb_work(struct work_struct *work)
{
+ struct nfsd4_callback *cb =
+ container_of(work, struct nfsd4_callback, cb_work);
struct nfs4_client *clp = cb->cb_clp;
struct rpc_clnt *clnt;
+ if (cb->cb_ops && cb->cb_ops->prepare)
+ cb->cb_ops->prepare(cb);
+
if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)
nfsd4_process_cb_update(cb);
clnt = clp->cl_cb_client;
if (!clnt) {
/* Callback channel broken, or client killed; give up: */
- nfsd4_release_cb(cb);
+ if (cb->cb_ops && cb->cb_ops->release)
+ cb->cb_ops->release(cb);
return;
}
cb->cb_msg.rpc_cred = clp->cl_cb_cred;
rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
- cb->cb_ops, cb);
-}
-
-void
-nfsd4_run_cb_null(struct work_struct *w)
-{
- struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback,
- cb_work);
- nfsd4_run_callback_rpc(cb);
-}
-
-void
-nfsd4_run_cb_recall(struct work_struct *w)
-{
- struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback,
- cb_work);
-
- nfsd4_prepare_cb_recall(cb->cb_op);
- nfsd4_run_callback_rpc(cb);
+ cb->cb_ops ? &nfsd4_cb_ops : &nfsd4_cb_probe_ops, cb);
}
-void nfsd4_cb_recall(struct nfs4_delegation *dp)
+void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
+ struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op)
{
- struct nfsd4_callback *cb = &dp->dl_recall;
- struct nfs4_client *clp = dp->dl_stid.sc_client;
-
- dp->dl_retries = 1;
- cb->cb_op = dp;
cb->cb_clp = clp;
- cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL];
+ cb->cb_msg.rpc_proc = &nfs4_cb_procedures[op];
cb->cb_msg.rpc_argp = cb;
cb->cb_msg.rpc_resp = cb;
-
- cb->cb_ops = &nfsd4_cb_recall_ops;
-
+ cb->cb_ops = ops;
+ INIT_WORK(&cb->cb_work, nfsd4_run_cb_work);
INIT_LIST_HEAD(&cb->cb_per_client);
cb->cb_done = true;
+}
- run_nfsd4_cb(&dp->dl_recall);
+void nfsd4_run_cb(struct nfsd4_callback *cb)
+{
+ queue_work(callback_wq, &cb->cb_work);
}
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index a0ab0a847d69..e1b3d3d472da 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -215,7 +215,8 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
memset(&ent, 0, sizeof(ent));
/* Authentication name */
- if (qword_get(&buf, buf1, PAGE_SIZE) <= 0)
+ len = qword_get(&buf, buf1, PAGE_SIZE);
+ if (len <= 0 || len >= IDMAP_NAMESZ)
goto out;
memcpy(ent.authname, buf1, sizeof(ent.authname));
@@ -245,12 +246,10 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
/* Name */
error = -EINVAL;
len = qword_get(&buf, buf1, PAGE_SIZE);
- if (len < 0)
+ if (len < 0 || len >= IDMAP_NAMESZ)
goto out;
if (len == 0)
set_bit(CACHE_NEGATIVE, &ent.h.flags);
- else if (len >= IDMAP_NAMESZ)
- goto out;
else
memcpy(ent.name, buf1, sizeof(ent.name));
error = -ENOMEM;
@@ -259,15 +258,12 @@ idtoname_parse(struct cache_detail *cd, char *buf, int buflen)
goto out;
cache_put(&res->h, cd);
-
error = 0;
out:
kfree(buf1);
-
return error;
}
-
static struct ent *
idtoname_lookup(struct cache_detail *cd, struct ent *item)
{
@@ -368,7 +364,7 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
{
struct ent ent, *res;
char *buf1;
- int error = -EINVAL;
+ int len, error = -EINVAL;
if (buf[buflen - 1] != '\n')
return (-EINVAL);
@@ -381,7 +377,8 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
memset(&ent, 0, sizeof(ent));
/* Authentication name */
- if (qword_get(&buf, buf1, PAGE_SIZE) <= 0)
+ len = qword_get(&buf, buf1, PAGE_SIZE);
+ if (len <= 0 || len >= IDMAP_NAMESZ)
goto out;
memcpy(ent.authname, buf1, sizeof(ent.authname));
@@ -392,8 +389,8 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
IDMAP_TYPE_USER : IDMAP_TYPE_GROUP;
/* Name */
- error = qword_get(&buf, buf1, PAGE_SIZE);
- if (error <= 0 || error >= IDMAP_NAMESZ)
+ len = qword_get(&buf, buf1, PAGE_SIZE);
+ if (len <= 0 || len >= IDMAP_NAMESZ)
goto out;
memcpy(ent.name, buf1, sizeof(ent.name));
@@ -421,7 +418,6 @@ nametoid_parse(struct cache_detail *cd, char *buf, int buflen)
error = 0;
out:
kfree(buf1);
-
return (error);
}
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 5e0dc528a0e8..cdeb3cfd6f32 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1013,6 +1013,49 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return status;
}
+static __be32
+nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_seek *seek)
+{
+ int whence;
+ __be32 status;
+ struct file *file;
+
+ status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
+ &seek->seek_stateid,
+ RD_STATE, &file);
+ if (status) {
+ dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
+ return status;
+ }
+
+ switch (seek->seek_whence) {
+ case NFS4_CONTENT_DATA:
+ whence = SEEK_DATA;
+ break;
+ case NFS4_CONTENT_HOLE:
+ whence = SEEK_HOLE;
+ break;
+ default:
+ status = nfserr_union_notsupp;
+ goto out;
+ }
+
+ /*
+ * Note: This call does change file->f_pos, but nothing in NFSD
+ * should ever file->f_pos.
+ */
+ seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
+ if (seek->seek_pos < 0)
+ status = nfserrno(seek->seek_pos);
+ else if (seek->seek_pos >= i_size_read(file_inode(file)))
+ seek->seek_eof = true;
+
+out:
+ fput(file);
+ return status;
+}
+
/* This routine never returns NFS_OK! If there are no other errors, it
* will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
* attributes matched. VERIFY is implemented by mapping NFSERR_SAME
@@ -1881,6 +1924,12 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
+
+ /* NFSv4.2 operations */
+ [OP_SEEK] = {
+ .op_func = (nfsd4op_func)nfsd4_seek,
+ .op_name = "OP_SEEK",
+ },
};
int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 9c271f42604a..ea95a2bc21b5 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -58,7 +58,7 @@ struct nfsd4_client_tracking_ops {
void (*create)(struct nfs4_client *);
void (*remove)(struct nfs4_client *);
int (*check)(struct nfs4_client *);
- void (*grace_done)(struct nfsd_net *, time_t);
+ void (*grace_done)(struct nfsd_net *);
};
/* Globals */
@@ -188,7 +188,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
status = mnt_want_write_file(nn->rec_file);
if (status)
- return;
+ goto out_creds;
dir = nn->rec_file->f_path.dentry;
/* lock the parent */
@@ -228,6 +228,7 @@ out_unlock:
user_recovery_dirname);
}
mnt_drop_write_file(nn->rec_file);
+out_creds:
nfs4_reset_creds(original_cred);
}
@@ -392,7 +393,7 @@ purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn)
}
static void
-nfsd4_recdir_purge_old(struct nfsd_net *nn, time_t boot_time)
+nfsd4_recdir_purge_old(struct nfsd_net *nn)
{
int status;
@@ -479,6 +480,16 @@ nfsd4_init_recdir(struct net *net)
return status;
}
+static void
+nfsd4_shutdown_recdir(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (!nn->rec_file)
+ return;
+ fput(nn->rec_file);
+ nn->rec_file = NULL;
+}
static int
nfs4_legacy_state_init(struct net *net)
@@ -512,10 +523,13 @@ nfsd4_load_reboot_recovery_data(struct net *net)
int status;
status = nfsd4_init_recdir(net);
- if (!status)
- status = nfsd4_recdir_load(net);
if (status)
- printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n");
+ return status;
+
+ status = nfsd4_recdir_load(net);
+ if (status)
+ nfsd4_shutdown_recdir(net);
+
return status;
}
@@ -546,21 +560,12 @@ err:
}
static void
-nfsd4_shutdown_recdir(struct nfsd_net *nn)
-{
- if (!nn->rec_file)
- return;
- fput(nn->rec_file);
- nn->rec_file = NULL;
-}
-
-static void
nfsd4_legacy_tracking_exit(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
nfs4_release_reclaim(nn);
- nfsd4_shutdown_recdir(nn);
+ nfsd4_shutdown_recdir(net);
nfs4_legacy_state_shutdown(net);
}
@@ -1016,7 +1021,7 @@ nfsd4_cld_check(struct nfs4_client *clp)
}
static void
-nfsd4_cld_grace_done(struct nfsd_net *nn, time_t boot_time)
+nfsd4_cld_grace_done(struct nfsd_net *nn)
{
int ret;
struct cld_upcall *cup;
@@ -1029,7 +1034,7 @@ nfsd4_cld_grace_done(struct nfsd_net *nn, time_t boot_time)
}
cup->cu_msg.cm_cmd = Cld_GraceDone;
- cup->cu_msg.cm_u.cm_gracetime = (int64_t)boot_time;
+ cup->cu_msg.cm_u.cm_gracetime = (int64_t)nn->boot_time;
ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_msg);
if (!ret)
ret = cup->cu_msg.cm_status;
@@ -1062,6 +1067,8 @@ MODULE_PARM_DESC(cltrack_legacy_disable,
#define LEGACY_TOPDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_TOPDIR="
#define LEGACY_RECDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_RECDIR="
+#define HAS_SESSION_ENV_PREFIX "NFSDCLTRACK_CLIENT_HAS_SESSION="
+#define GRACE_START_ENV_PREFIX "NFSDCLTRACK_GRACE_START="
static char *
nfsd4_cltrack_legacy_topdir(void)
@@ -1126,10 +1133,60 @@ nfsd4_cltrack_legacy_recdir(const struct xdr_netobj *name)
return result;
}
+static char *
+nfsd4_cltrack_client_has_session(struct nfs4_client *clp)
+{
+ int copied;
+ size_t len;
+ char *result;
+
+ /* prefix + Y/N character + terminating NULL */
+ len = strlen(HAS_SESSION_ENV_PREFIX) + 1 + 1;
+
+ result = kmalloc(len, GFP_KERNEL);
+ if (!result)
+ return result;
+
+ copied = snprintf(result, len, HAS_SESSION_ENV_PREFIX "%c",
+ clp->cl_minorversion ? 'Y' : 'N');
+ if (copied >= len) {
+ /* just return nothing if output was truncated */
+ kfree(result);
+ return NULL;
+ }
+
+ return result;
+}
+
+static char *
+nfsd4_cltrack_grace_start(time_t grace_start)
+{
+ int copied;
+ size_t len;
+ char *result;
+
+ /* prefix + max width of int64_t string + terminating NULL */
+ len = strlen(GRACE_START_ENV_PREFIX) + 22 + 1;
+
+ result = kmalloc(len, GFP_KERNEL);
+ if (!result)
+ return result;
+
+ copied = snprintf(result, len, GRACE_START_ENV_PREFIX "%ld",
+ grace_start);
+ if (copied >= len) {
+ /* just return nothing if output was truncated */
+ kfree(result);
+ return NULL;
+ }
+
+ return result;
+}
+
static int
-nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *legacy)
+nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *env0, char *env1)
{
- char *envp[2];
+ char *envp[3];
char *argv[4];
int ret;
@@ -1140,10 +1197,12 @@ nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *legacy)
dprintk("%s: cmd: %s\n", __func__, cmd);
dprintk("%s: arg: %s\n", __func__, arg ? arg : "(null)");
- dprintk("%s: legacy: %s\n", __func__, legacy ? legacy : "(null)");
+ dprintk("%s: env0: %s\n", __func__, env0 ? env0 : "(null)");
+ dprintk("%s: env1: %s\n", __func__, env1 ? env1 : "(null)");
- envp[0] = legacy;
- envp[1] = NULL;
+ envp[0] = env0;
+ envp[1] = env1;
+ envp[2] = NULL;
argv[0] = (char *)cltrack_prog;
argv[1] = cmd;
@@ -1187,28 +1246,78 @@ bin_to_hex_dup(const unsigned char *src, int srclen)
}
static int
-nfsd4_umh_cltrack_init(struct net __attribute__((unused)) *net)
+nfsd4_umh_cltrack_init(struct net *net)
{
+ int ret;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ char *grace_start = nfsd4_cltrack_grace_start(nn->boot_time);
+
/* XXX: The usermode helper s not working in container yet. */
if (net != &init_net) {
WARN(1, KERN_ERR "NFSD: attempt to initialize umh client "
"tracking in a container!\n");
return -EINVAL;
}
- return nfsd4_umh_cltrack_upcall("init", NULL, NULL);
+
+ ret = nfsd4_umh_cltrack_upcall("init", NULL, grace_start, NULL);
+ kfree(grace_start);
+ return ret;
+}
+
+static void
+nfsd4_cltrack_upcall_lock(struct nfs4_client *clp)
+{
+ wait_on_bit_lock(&clp->cl_flags, NFSD4_CLIENT_UPCALL_LOCK,
+ TASK_UNINTERRUPTIBLE);
+}
+
+static void
+nfsd4_cltrack_upcall_unlock(struct nfs4_client *clp)
+{
+ smp_mb__before_atomic();
+ clear_bit(NFSD4_CLIENT_UPCALL_LOCK, &clp->cl_flags);
+ smp_mb__after_atomic();
+ wake_up_bit(&clp->cl_flags, NFSD4_CLIENT_UPCALL_LOCK);
}
static void
nfsd4_umh_cltrack_create(struct nfs4_client *clp)
{
- char *hexid;
+ char *hexid, *has_session, *grace_start;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ /*
+ * With v4.0 clients, there's little difference in outcome between a
+ * create and check operation, and we can end up calling into this
+ * function multiple times per client (once for each openowner). So,
+ * for v4.0 clients skip upcalling once the client has been recorded
+ * on stable storage.
+ *
+ * For v4.1+ clients, the outcome of the two operations is different,
+ * so we must ensure that we upcall for the create operation. v4.1+
+ * clients call this on RECLAIM_COMPLETE though, so we should only end
+ * up doing a single create upcall per client.
+ */
+ if (clp->cl_minorversion == 0 &&
+ test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
+ return;
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
if (!hexid) {
dprintk("%s: can't allocate memory for upcall!\n", __func__);
return;
}
- nfsd4_umh_cltrack_upcall("create", hexid, NULL);
+
+ has_session = nfsd4_cltrack_client_has_session(clp);
+ grace_start = nfsd4_cltrack_grace_start(nn->boot_time);
+
+ nfsd4_cltrack_upcall_lock(clp);
+ if (!nfsd4_umh_cltrack_upcall("create", hexid, has_session, grace_start))
+ set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
+ nfsd4_cltrack_upcall_unlock(clp);
+
+ kfree(has_session);
+ kfree(grace_start);
kfree(hexid);
}
@@ -1217,12 +1326,21 @@ nfsd4_umh_cltrack_remove(struct nfs4_client *clp)
{
char *hexid;
+ if (!test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
+ return;
+
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
if (!hexid) {
dprintk("%s: can't allocate memory for upcall!\n", __func__);
return;
}
- nfsd4_umh_cltrack_upcall("remove", hexid, NULL);
+
+ nfsd4_cltrack_upcall_lock(clp);
+ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags) &&
+ nfsd4_umh_cltrack_upcall("remove", hexid, NULL, NULL) == 0)
+ clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
+ nfsd4_cltrack_upcall_unlock(clp);
+
kfree(hexid);
}
@@ -1230,30 +1348,45 @@ static int
nfsd4_umh_cltrack_check(struct nfs4_client *clp)
{
int ret;
- char *hexid, *legacy;
+ char *hexid, *has_session, *legacy;
+
+ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
+ return 0;
hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len);
if (!hexid) {
dprintk("%s: can't allocate memory for upcall!\n", __func__);
return -ENOMEM;
}
+
+ has_session = nfsd4_cltrack_client_has_session(clp);
legacy = nfsd4_cltrack_legacy_recdir(&clp->cl_name);
- ret = nfsd4_umh_cltrack_upcall("check", hexid, legacy);
+
+ nfsd4_cltrack_upcall_lock(clp);
+ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) {
+ ret = 0;
+ } else {
+ ret = nfsd4_umh_cltrack_upcall("check", hexid, has_session, legacy);
+ if (ret == 0)
+ set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
+ }
+ nfsd4_cltrack_upcall_unlock(clp);
+ kfree(has_session);
kfree(legacy);
kfree(hexid);
+
return ret;
}
static void
-nfsd4_umh_cltrack_grace_done(struct nfsd_net __attribute__((unused)) *nn,
- time_t boot_time)
+nfsd4_umh_cltrack_grace_done(struct nfsd_net *nn)
{
char *legacy;
char timestr[22]; /* FIXME: better way to determine max size? */
- sprintf(timestr, "%ld", boot_time);
+ sprintf(timestr, "%ld", nn->boot_time);
legacy = nfsd4_cltrack_legacy_topdir();
- nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy);
+ nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy, NULL);
kfree(legacy);
}
@@ -1356,10 +1489,10 @@ nfsd4_client_record_check(struct nfs4_client *clp)
}
void
-nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time)
+nfsd4_record_grace_done(struct nfsd_net *nn)
{
if (nn->client_tracking_ops)
- nn->client_tracking_ops->grace_done(nn, boot_time);
+ nn->client_tracking_ops->grace_done(nn);
}
static int
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2e80a59e7e91..551f32d7f5c7 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -96,6 +96,8 @@ static struct kmem_cache *deleg_slab;
static void free_session(struct nfsd4_session *);
+static struct nfsd4_callback_ops nfsd4_cb_recall_ops;
+
static bool is_session_dead(struct nfsd4_session *ses)
{
return ses->se_flags & NFS4_SESSION_DEAD;
@@ -645,7 +647,9 @@ alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh)
INIT_LIST_HEAD(&dp->dl_perclnt);
INIT_LIST_HEAD(&dp->dl_recall_lru);
dp->dl_type = NFS4_OPEN_DELEGATE_READ;
- INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall);
+ dp->dl_retries = 1;
+ nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
+ &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
return dp;
out_dec:
atomic_long_dec(&num_delegations);
@@ -673,15 +677,20 @@ nfs4_put_stid(struct nfs4_stid *s)
static void nfs4_put_deleg_lease(struct nfs4_file *fp)
{
- lockdep_assert_held(&state_lock);
+ struct file *filp = NULL;
+ struct file_lock *fl;
- if (!fp->fi_lease)
- return;
- if (atomic_dec_and_test(&fp->fi_delegees)) {
- vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
+ spin_lock(&fp->fi_lock);
+ if (fp->fi_lease && atomic_dec_and_test(&fp->fi_delegees)) {
+ swap(filp, fp->fi_deleg_file);
+ fl = fp->fi_lease;
fp->fi_lease = NULL;
- fput(fp->fi_deleg_file);
- fp->fi_deleg_file = NULL;
+ }
+ spin_unlock(&fp->fi_lock);
+
+ if (filp) {
+ vfs_setlease(filp, F_UNLCK, &fl);
+ fput(filp);
}
}
@@ -717,8 +726,6 @@ unhash_delegation_locked(struct nfs4_delegation *dp)
list_del_init(&dp->dl_recall_lru);
list_del_init(&dp->dl_perfile);
spin_unlock(&fp->fi_lock);
- if (fp)
- nfs4_put_deleg_lease(fp);
}
static void destroy_delegation(struct nfs4_delegation *dp)
@@ -726,6 +733,7 @@ static void destroy_delegation(struct nfs4_delegation *dp)
spin_lock(&state_lock);
unhash_delegation_locked(dp);
spin_unlock(&state_lock);
+ nfs4_put_deleg_lease(dp->dl_stid.sc_file);
nfs4_put_stid(&dp->dl_stid);
}
@@ -735,6 +743,8 @@ static void revoke_delegation(struct nfs4_delegation *dp)
WARN_ON(!list_empty(&dp->dl_recall_lru));
+ nfs4_put_deleg_lease(dp->dl_stid.sc_file);
+
if (clp->cl_minorversion == 0)
nfs4_put_stid(&dp->dl_stid);
else {
@@ -1635,6 +1645,7 @@ __destroy_client(struct nfs4_client *clp)
while (!list_empty(&reaplist)) {
dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
list_del_init(&dp->dl_recall_lru);
+ nfs4_put_deleg_lease(dp->dl_stid.sc_file);
nfs4_put_stid(&dp->dl_stid);
}
while (!list_empty(&clp->cl_revoked)) {
@@ -1862,7 +1873,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
free_client(clp);
return NULL;
}
- INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null);
+ 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);
@@ -3349,8 +3360,12 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
return ret;
}
-void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp)
+#define cb_to_delegation(cb) \
+ container_of(cb, struct nfs4_delegation, dl_recall)
+
+static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
{
+ struct nfs4_delegation *dp = cb_to_delegation(cb);
struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
nfsd_net_id);
@@ -3371,6 +3386,43 @@ void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp)
spin_unlock(&state_lock);
}
+static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
+ struct rpc_task *task)
+{
+ struct nfs4_delegation *dp = cb_to_delegation(cb);
+
+ switch (task->tk_status) {
+ case 0:
+ return 1;
+ case -EBADHANDLE:
+ case -NFS4ERR_BAD_STATEID:
+ /*
+ * Race: client probably got cb_recall before open reply
+ * granting delegation.
+ */
+ if (dp->dl_retries--) {
+ rpc_delay(task, 2 * HZ);
+ return 0;
+ }
+ /*FALLTHRU*/
+ default:
+ return -1;
+ }
+}
+
+static void nfsd4_cb_recall_release(struct nfsd4_callback *cb)
+{
+ struct nfs4_delegation *dp = cb_to_delegation(cb);
+
+ nfs4_put_stid(&dp->dl_stid);
+}
+
+static struct nfsd4_callback_ops nfsd4_cb_recall_ops = {
+ .prepare = nfsd4_cb_recall_prepare,
+ .done = nfsd4_cb_recall_done,
+ .release = nfsd4_cb_recall_release,
+};
+
static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
{
/*
@@ -3381,7 +3433,7 @@ static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
* it's safe to take a reference.
*/
atomic_inc(&dp->dl_stid.sc_count);
- nfsd4_cb_recall(dp);
+ nfsd4_run_cb(&dp->dl_recall);
}
/* Called from break_lease() with i_lock held. */
@@ -3759,7 +3811,6 @@ static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag)
fl = locks_alloc_lock();
if (!fl)
return NULL;
- locks_init_lock(fl);
fl->fl_lmops = &nfsd_lease_mng_ops;
fl->fl_flags = FL_DELEG;
fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
@@ -4107,7 +4158,7 @@ out:
return status;
}
-static void
+void
nfsd4_end_grace(struct nfsd_net *nn)
{
/* do nothing if grace period already ended */
@@ -4116,14 +4167,28 @@ nfsd4_end_grace(struct nfsd_net *nn)
dprintk("NFSD: end of grace period\n");
nn->grace_ended = true;
- nfsd4_record_grace_done(nn, nn->boot_time);
+ /*
+ * If the server goes down again right now, an NFSv4
+ * client will still be allowed to reclaim after it comes back up,
+ * even if it hasn't yet had a chance to reclaim state this time.
+ *
+ */
+ nfsd4_record_grace_done(nn);
+ /*
+ * At this point, NFSv4 clients can still reclaim. But if the
+ * server crashes, any that have not yet reclaimed will be out
+ * of luck on the next boot.
+ *
+ * (NFSv4.1+ clients are considered to have reclaimed once they
+ * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
+ * have reclaimed after their first OPEN.)
+ */
locks_end_grace(&nn->nfsd4_manager);
/*
- * Now that every NFSv4 client has had the chance to recover and
- * to see the (possibly new, possibly shorter) lease time, we
- * can safely set the next grace time to the current lease time:
+ * At this point, and once lockd and/or any other containers
+ * exit their grace period, further reclaims will fail and
+ * regular locking can resume.
*/
- nn->nfsd4_grace = nn->nfsd4_lease;
}
static time_t
@@ -5210,7 +5275,6 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
}
fp = lock_stp->st_stid.sc_file;
- locks_init_lock(file_lock);
switch (lock->lk_type) {
case NFS4_READ_LT:
case NFS4_READW_LT:
@@ -5354,7 +5418,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfserr_jukebox;
goto out;
}
- locks_init_lock(file_lock);
+
switch (lockt->lt_type) {
case NFS4_READ_LT:
case NFS4_READW_LT:
@@ -5432,7 +5496,7 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfserr_jukebox;
goto fput;
}
- locks_init_lock(file_lock);
+
file_lock->fl_type = F_UNLCK;
file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
file_lock->fl_pid = current->tgid;
@@ -5645,6 +5709,9 @@ nfs4_check_open_reclaim(clientid_t *clid,
if (status)
return nfserr_reclaim_bad;
+ if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))
+ return nfserr_no_grace;
+
if (nfsd4_client_record_check(cstate->clp))
return nfserr_reclaim_bad;
@@ -6342,10 +6409,10 @@ nfs4_state_start_net(struct net *net)
ret = nfs4_state_create_net(net);
if (ret)
return ret;
- nfsd4_client_tracking_init(net);
nn->boot_time = get_seconds();
- locks_start_grace(net, &nn->nfsd4_manager);
nn->grace_ended = false;
+ locks_start_grace(net, &nn->nfsd4_manager);
+ nfsd4_client_tracking_init(net);
printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
nn->nfsd4_grace, net);
queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
@@ -6402,6 +6469,7 @@ nfs4_state_shutdown_net(struct net *net)
list_for_each_safe(pos, next, &reaplist) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
list_del_init(&dp->dl_recall_lru);
+ nfs4_put_deleg_lease(dp->dl_stid.sc_file);
nfs4_put_stid(&dp->dl_stid);
}
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index f9821ce6658a..7ec646380005 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -31,13 +31,6 @@
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * TODO: Neil Brown made the following observation: We currently
- * initially reserve NFSD_BUFSIZE space on the transmit queue and
- * never release any of that until the request is complete.
- * It would be good to calculate a new maximum response size while
- * decoding the COMPOUND, and call svc_reserve with this number
- * at the end of nfs4svc_decode_compoundargs.
*/
#include <linux/slab.h>
@@ -1521,6 +1514,22 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
}
static __be32
+nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
+{
+ DECODE_HEAD;
+
+ status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
+ if (status)
+ return status;
+
+ READ_BUF(8 + 4);
+ p = xdr_decode_hyper(p, &seek->seek_offset);
+ seek->seek_whence = be32_to_cpup(p);
+
+ DECODE_TAIL;
+}
+
+static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
return nfs_ok;
@@ -1593,6 +1602,20 @@ static nfsd4_dec nfsd4_dec_ops[] = {
[OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
[OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
+
+ /* new operations for NFSv4.2 */
+ [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
+ [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
};
static inline bool
@@ -1670,6 +1693,14 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
readbytes += nfsd4_max_reply(argp->rqstp, op);
} else
max_reply += nfsd4_max_reply(argp->rqstp, op);
+ /*
+ * OP_LOCK may return a conflicting lock. (Special case
+ * because it will just skip encoding this if it runs
+ * out of xdr buffer space, and it is the only operation
+ * that behaves this way.)
+ */
+ if (op->opnum == OP_LOCK)
+ max_reply += NFS4_OPAQUE_LIMIT;
if (op->status) {
argp->opcnt = i+1;
@@ -3751,6 +3782,22 @@ nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
}
static __be32
+nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_seek *seek)
+{
+ __be32 *p;
+
+ if (nfserr)
+ return nfserr;
+
+ p = xdr_reserve_space(&resp->xdr, 4 + 8);
+ *p++ = cpu_to_be32(seek->seek_eof);
+ p = xdr_encode_hyper(p, seek->seek_pos);
+
+ return nfserr;
+}
+
+static __be32
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
{
return nfserr;
@@ -3822,6 +3869,20 @@ static nfsd4_enc nfsd4_enc_ops[] = {
[OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
[OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
+
+ /* NFSv4.2 operations */
+ [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
+ [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
};
/*
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index ff9567633245..122f69185ef5 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -27,8 +27,12 @@
*/
#define TARGET_BUCKET_SIZE 64
-static struct hlist_head * cache_hash;
-static struct list_head lru_head;
+struct nfsd_drc_bucket {
+ struct list_head lru_head;
+ 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 */
@@ -36,6 +40,7 @@ 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
@@ -43,7 +48,7 @@ static unsigned int maskbits;
*/
/* total number of entries */
-static unsigned int num_drc_entries;
+static atomic_t num_drc_entries;
/* cache misses due only to checksum comparison failures */
static unsigned int payload_misses;
@@ -75,7 +80,6 @@ static struct shrinker nfsd_reply_cache_shrinker = {
* A cache entry is "single use" if c_state == RC_INPROG
* Otherwise, it when accessing _prev or _next, the lock must be held.
*/
-static DEFINE_SPINLOCK(cache_lock);
static DECLARE_DELAYED_WORK(cache_cleaner, cache_cleaner_func);
/*
@@ -116,6 +120,12 @@ nfsd_hashsize(unsigned int limit)
return roundup_pow_of_two(limit / TARGET_BUCKET_SIZE);
}
+static u32
+nfsd_cache_hash(__be32 xid)
+{
+ return hash_32(be32_to_cpu(xid), maskbits);
+}
+
static struct svc_cacherep *
nfsd_reply_cache_alloc(void)
{
@@ -126,7 +136,6 @@ nfsd_reply_cache_alloc(void)
rp->c_state = RC_UNUSED;
rp->c_type = RC_NOCACHE;
INIT_LIST_HEAD(&rp->c_lru);
- INIT_HLIST_NODE(&rp->c_hash);
}
return rp;
}
@@ -138,29 +147,27 @@ nfsd_reply_cache_free_locked(struct svc_cacherep *rp)
drc_mem_usage -= rp->c_replvec.iov_len;
kfree(rp->c_replvec.iov_base);
}
- if (!hlist_unhashed(&rp->c_hash))
- hlist_del(&rp->c_hash);
list_del(&rp->c_lru);
- --num_drc_entries;
+ atomic_dec(&num_drc_entries);
drc_mem_usage -= sizeof(*rp);
kmem_cache_free(drc_slab, rp);
}
static void
-nfsd_reply_cache_free(struct svc_cacherep *rp)
+nfsd_reply_cache_free(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
{
- spin_lock(&cache_lock);
+ spin_lock(&b->cache_lock);
nfsd_reply_cache_free_locked(rp);
- spin_unlock(&cache_lock);
+ spin_unlock(&b->cache_lock);
}
int nfsd_reply_cache_init(void)
{
unsigned int hashsize;
+ unsigned int i;
- INIT_LIST_HEAD(&lru_head);
max_drc_entries = nfsd_cache_size_limit();
- num_drc_entries = 0;
+ atomic_set(&num_drc_entries, 0);
hashsize = nfsd_hashsize(max_drc_entries);
maskbits = ilog2(hashsize);
@@ -170,9 +177,14 @@ int nfsd_reply_cache_init(void)
if (!drc_slab)
goto out_nomem;
- cache_hash = kcalloc(hashsize, sizeof(struct hlist_head), GFP_KERNEL);
- if (!cache_hash)
+ drc_hashtbl = kcalloc(hashsize, sizeof(*drc_hashtbl), GFP_KERNEL);
+ if (!drc_hashtbl)
goto out_nomem;
+ for (i = 0; i < hashsize; i++) {
+ INIT_LIST_HEAD(&drc_hashtbl[i].lru_head);
+ spin_lock_init(&drc_hashtbl[i].cache_lock);
+ }
+ drc_hashsize = hashsize;
return 0;
out_nomem:
@@ -184,17 +196,22 @@ out_nomem:
void nfsd_reply_cache_shutdown(void)
{
struct svc_cacherep *rp;
+ unsigned int i;
unregister_shrinker(&nfsd_reply_cache_shrinker);
cancel_delayed_work_sync(&cache_cleaner);
- while (!list_empty(&lru_head)) {
- rp = list_entry(lru_head.next, struct svc_cacherep, c_lru);
- nfsd_reply_cache_free_locked(rp);
+ for (i = 0; i < drc_hashsize; i++) {
+ struct list_head *head = &drc_hashtbl[i].lru_head;
+ while (!list_empty(head)) {
+ rp = list_first_entry(head, struct svc_cacherep, c_lru);
+ nfsd_reply_cache_free_locked(rp);
+ }
}
- kfree (cache_hash);
- cache_hash = NULL;
+ kfree (drc_hashtbl);
+ drc_hashtbl = NULL;
+ drc_hashsize = 0;
if (drc_slab) {
kmem_cache_destroy(drc_slab);
@@ -207,61 +224,63 @@ void nfsd_reply_cache_shutdown(void)
* not already scheduled.
*/
static void
-lru_put_end(struct svc_cacherep *rp)
+lru_put_end(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
{
rp->c_timestamp = jiffies;
- list_move_tail(&rp->c_lru, &lru_head);
+ list_move_tail(&rp->c_lru, &b->lru_head);
schedule_delayed_work(&cache_cleaner, RC_EXPIRE);
}
-/*
- * Move a cache entry from one hash list to another
- */
-static void
-hash_refile(struct svc_cacherep *rp)
-{
- hlist_del_init(&rp->c_hash);
- /*
- * No point in byte swapping c_xid since we're just using it to pick
- * a hash bucket.
- */
- hlist_add_head(&rp->c_hash, cache_hash +
- hash_32((__force u32)rp->c_xid, maskbits));
-}
-
-/*
- * Walk the LRU list and prune off entries that are older than RC_EXPIRE.
- * Also prune the oldest ones when the total exceeds the max number of entries.
- */
static long
-prune_cache_entries(void)
+prune_bucket(struct nfsd_drc_bucket *b)
{
struct svc_cacherep *rp, *tmp;
long freed = 0;
- list_for_each_entry_safe(rp, tmp, &lru_head, c_lru) {
+ list_for_each_entry_safe(rp, tmp, &b->lru_head, c_lru) {
/*
* Don't free entries attached to calls that are still
* in-progress, but do keep scanning the list.
*/
if (rp->c_state == RC_INPROG)
continue;
- if (num_drc_entries <= max_drc_entries &&
+ if (atomic_read(&num_drc_entries) <= max_drc_entries &&
time_before(jiffies, rp->c_timestamp + RC_EXPIRE))
break;
nfsd_reply_cache_free_locked(rp);
freed++;
}
+ return freed;
+}
+
+/*
+ * Walk the LRU list and prune off entries that are older than RC_EXPIRE.
+ * Also prune the oldest ones when the total exceeds the max number of entries.
+ */
+static long
+prune_cache_entries(void)
+{
+ unsigned int i;
+ long freed = 0;
+ bool cancel = true;
+
+ for (i = 0; i < drc_hashsize; i++) {
+ struct nfsd_drc_bucket *b = &drc_hashtbl[i];
+
+ if (list_empty(&b->lru_head))
+ continue;
+ spin_lock(&b->cache_lock);
+ freed += prune_bucket(b);
+ if (!list_empty(&b->lru_head))
+ cancel = false;
+ spin_unlock(&b->cache_lock);
+ }
/*
- * Conditionally rearm the job. If we cleaned out the list, then
- * cancel any pending run (since there won't be any work to do).
- * Otherwise, we rearm the job or modify the existing one to run in
- * RC_EXPIRE since we just ran the pruner.
+ * Conditionally rearm the job to run in RC_EXPIRE since we just
+ * ran the pruner.
*/
- if (list_empty(&lru_head))
- cancel_delayed_work(&cache_cleaner);
- else
+ if (!cancel)
mod_delayed_work(system_wq, &cache_cleaner, RC_EXPIRE);
return freed;
}
@@ -269,32 +288,19 @@ prune_cache_entries(void)
static void
cache_cleaner_func(struct work_struct *unused)
{
- spin_lock(&cache_lock);
prune_cache_entries();
- spin_unlock(&cache_lock);
}
static unsigned long
nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc)
{
- unsigned long num;
-
- spin_lock(&cache_lock);
- num = num_drc_entries;
- spin_unlock(&cache_lock);
-
- return num;
+ return atomic_read(&num_drc_entries);
}
static unsigned long
nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
{
- unsigned long freed;
-
- spin_lock(&cache_lock);
- freed = prune_cache_entries();
- spin_unlock(&cache_lock);
- return freed;
+ return prune_cache_entries();
}
/*
* Walk an xdr_buf and get a CRC for at most the first RC_CSUMLEN bytes
@@ -332,20 +338,24 @@ nfsd_cache_csum(struct svc_rqst *rqstp)
static bool
nfsd_cache_match(struct svc_rqst *rqstp, __wsum csum, struct svc_cacherep *rp)
{
- /* Check RPC header info first */
- if (rqstp->rq_xid != rp->c_xid || rqstp->rq_proc != rp->c_proc ||
- rqstp->rq_prot != rp->c_prot || rqstp->rq_vers != rp->c_vers ||
- rqstp->rq_arg.len != rp->c_len ||
- !rpc_cmp_addr(svc_addr(rqstp), (struct sockaddr *)&rp->c_addr) ||
- rpc_get_port(svc_addr(rqstp)) != rpc_get_port((struct sockaddr *)&rp->c_addr))
+ /* Check RPC XID first */
+ if (rqstp->rq_xid != rp->c_xid)
return false;
-
/* compare checksum of NFS data */
if (csum != rp->c_csum) {
++payload_misses;
return false;
}
+ /* Other discriminators */
+ if (rqstp->rq_proc != rp->c_proc ||
+ rqstp->rq_prot != rp->c_prot ||
+ rqstp->rq_vers != rp->c_vers ||
+ rqstp->rq_arg.len != rp->c_len ||
+ !rpc_cmp_addr(svc_addr(rqstp), (struct sockaddr *)&rp->c_addr) ||
+ rpc_get_port(svc_addr(rqstp)) != rpc_get_port((struct sockaddr *)&rp->c_addr))
+ return false;
+
return true;
}
@@ -355,18 +365,14 @@ nfsd_cache_match(struct svc_rqst *rqstp, __wsum csum, struct svc_cacherep *rp)
* NULL on failure.
*/
static struct svc_cacherep *
-nfsd_cache_search(struct svc_rqst *rqstp, __wsum csum)
+nfsd_cache_search(struct nfsd_drc_bucket *b, struct svc_rqst *rqstp,
+ __wsum csum)
{
struct svc_cacherep *rp, *ret = NULL;
- struct hlist_head *rh;
+ struct list_head *rh = &b->lru_head;
unsigned int entries = 0;
- /*
- * No point in byte swapping rq_xid since we're just using it to pick
- * a hash bucket.
- */
- rh = &cache_hash[hash_32((__force u32)rqstp->rq_xid, maskbits)];
- hlist_for_each_entry(rp, rh, c_hash) {
+ list_for_each_entry(rp, rh, c_lru) {
++entries;
if (nfsd_cache_match(rqstp, csum, rp)) {
ret = rp;
@@ -377,11 +383,12 @@ nfsd_cache_search(struct svc_rqst *rqstp, __wsum csum)
/* tally hash chain length stats */
if (entries > longest_chain) {
longest_chain = entries;
- longest_chain_cachesize = num_drc_entries;
+ longest_chain_cachesize = atomic_read(&num_drc_entries);
} else if (entries == longest_chain) {
/* prefer to keep the smallest cachesize possible here */
- longest_chain_cachesize = min(longest_chain_cachesize,
- num_drc_entries);
+ longest_chain_cachesize = min_t(unsigned int,
+ longest_chain_cachesize,
+ atomic_read(&num_drc_entries));
}
return ret;
@@ -403,6 +410,8 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)
vers = rqstp->rq_vers,
proc = rqstp->rq_proc;
__wsum csum;
+ u32 hash = nfsd_cache_hash(xid);
+ struct nfsd_drc_bucket *b = &drc_hashtbl[hash];
unsigned long age;
int type = rqstp->rq_cachetype;
int rtn = RC_DOIT;
@@ -420,16 +429,16 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)
* preallocate an entry.
*/
rp = nfsd_reply_cache_alloc();
- spin_lock(&cache_lock);
+ spin_lock(&b->cache_lock);
if (likely(rp)) {
- ++num_drc_entries;
+ atomic_inc(&num_drc_entries);
drc_mem_usage += sizeof(*rp);
}
/* go ahead and prune the cache */
- prune_cache_entries();
+ prune_bucket(b);
- found = nfsd_cache_search(rqstp, csum);
+ found = nfsd_cache_search(b, rqstp, csum);
if (found) {
if (likely(rp))
nfsd_reply_cache_free_locked(rp);
@@ -454,8 +463,7 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)
rp->c_len = rqstp->rq_arg.len;
rp->c_csum = csum;
- hash_refile(rp);
- lru_put_end(rp);
+ lru_put_end(b, rp);
/* release any buffer */
if (rp->c_type == RC_REPLBUFF) {
@@ -465,14 +473,14 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)
}
rp->c_type = RC_NOCACHE;
out:
- spin_unlock(&cache_lock);
+ spin_unlock(&b->cache_lock);
return rtn;
found_entry:
nfsdstats.rchits++;
/* We found a matching entry which is either in progress or done. */
age = jiffies - rp->c_timestamp;
- lru_put_end(rp);
+ lru_put_end(b, rp);
rtn = RC_DROPIT;
/* Request being processed or excessive rexmits */
@@ -527,18 +535,23 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
{
struct svc_cacherep *rp = rqstp->rq_cacherep;
struct kvec *resv = &rqstp->rq_res.head[0], *cachv;
+ u32 hash;
+ struct nfsd_drc_bucket *b;
int len;
size_t bufsize = 0;
if (!rp)
return;
+ hash = nfsd_cache_hash(rp->c_xid);
+ b = &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(rp);
+ nfsd_reply_cache_free(b, rp);
return;
}
@@ -553,23 +566,23 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
bufsize = len << 2;
cachv->iov_base = kmalloc(bufsize, GFP_KERNEL);
if (!cachv->iov_base) {
- nfsd_reply_cache_free(rp);
+ nfsd_reply_cache_free(b, rp);
return;
}
cachv->iov_len = bufsize;
memcpy(cachv->iov_base, statp, bufsize);
break;
case RC_NOCACHE:
- nfsd_reply_cache_free(rp);
+ nfsd_reply_cache_free(b, rp);
return;
}
- spin_lock(&cache_lock);
+ spin_lock(&b->cache_lock);
drc_mem_usage += bufsize;
- lru_put_end(rp);
+ lru_put_end(b, rp);
rp->c_secure = rqstp->rq_secure;
rp->c_type = cachetype;
rp->c_state = RC_DONE;
- spin_unlock(&cache_lock);
+ spin_unlock(&b->cache_lock);
return;
}
@@ -600,9 +613,9 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data)
*/
static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
{
- spin_lock(&cache_lock);
seq_printf(m, "max entries: %u\n", max_drc_entries);
- seq_printf(m, "num entries: %u\n", num_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);
seq_printf(m, "cache hits: %u\n", nfsdstats.rchits);
@@ -611,7 +624,6 @@ static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
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);
- spin_unlock(&cache_lock);
return 0;
}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 4e042105fb6e..ca73ca79a0ee 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -49,6 +49,7 @@ enum {
NFSD_Leasetime,
NFSD_Gracetime,
NFSD_RecoveryDir,
+ NFSD_V4EndGrace,
#endif
};
@@ -68,6 +69,7 @@ static ssize_t write_maxconn(struct file *file, char *buf, size_t size);
static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
+static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size);
#endif
static ssize_t (*write_op[])(struct file *, char *, size_t) = {
@@ -84,6 +86,7 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = {
[NFSD_Leasetime] = write_leasetime,
[NFSD_Gracetime] = write_gracetime,
[NFSD_RecoveryDir] = write_recoverydir,
+ [NFSD_V4EndGrace] = write_v4_end_grace,
#endif
};
@@ -1077,6 +1080,47 @@ static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
return rv;
}
+/**
+ * write_v4_end_grace - release grace period for nfsd's v4.x lock manager
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ * OR
+ *
+ * Input:
+ * buf: any value
+ * size: non-zero length of C string in @buf
+ * Output:
+ * passed-in buffer filled with "Y" or "N" with a newline
+ * and NULL-terminated C string. This indicates whether
+ * the grace period has ended in the current net
+ * namespace. Return code is the size in bytes of the
+ * string. Writing a string that starts with 'Y', 'y', or
+ * '1' to the file will end the grace period for nfsd's v4
+ * lock manager.
+ */
+static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size)
+{
+ struct net *net = file->f_dentry->d_sb->s_fs_info;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (size > 0) {
+ switch(buf[0]) {
+ case 'Y':
+ case 'y':
+ case '1':
+ nfsd4_end_grace(nn);
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n",
+ nn->grace_ended ? 'Y' : 'N');
+}
+
#endif
/*----------------------------------------------------------------------------*/
@@ -1110,6 +1154,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
[NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
+ [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO},
#endif
/* last one */ {""}
};
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 847daf37e566..747f3b95bd11 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -251,7 +251,7 @@ void nfsd_lockd_shutdown(void);
#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
#define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
#define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
-#define nfserr_metadata_notsupp cpu_to_be32(NFS4ERR_METADATA_NOTSUPP)
+#define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
#define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
#define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
#define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index e883a5868be6..88026fc6a981 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -209,8 +209,10 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
* fix that case easily.
*/
struct cred *new = prepare_creds();
- if (!new)
- return nfserrno(-ENOMEM);
+ if (!new) {
+ error = nfserrno(-ENOMEM);
+ goto out;
+ }
new->cap_effective =
cap_raise_nfsd_set(new->cap_effective,
new->cap_permitted);
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 4a89e00d7461..bf52dc7b15e7 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -62,16 +62,21 @@ typedef struct {
(s)->si_generation
struct nfsd4_callback {
- void *cb_op;
struct nfs4_client *cb_clp;
struct list_head cb_per_client;
u32 cb_minorversion;
struct rpc_message cb_msg;
- const struct rpc_call_ops *cb_ops;
+ struct nfsd4_callback_ops *cb_ops;
struct work_struct cb_work;
bool cb_done;
};
+struct nfsd4_callback_ops {
+ void (*prepare)(struct nfsd4_callback *);
+ int (*done)(struct nfsd4_callback *, struct rpc_task *);
+ void (*release)(struct nfsd4_callback *);
+};
+
/*
* A core object that represents a "common" stateid. These are generally
* embedded within the different (more specific) stateid objects and contain
@@ -306,6 +311,7 @@ struct nfs4_client {
#define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
#define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
#define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
+#define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
#define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
1 << NFSD4_CLIENT_CB_KILL)
unsigned long cl_flags;
@@ -517,6 +523,13 @@ static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
#define RD_STATE 0x00000010
#define WR_STATE 0x00000020
+enum nfsd4_cb_op {
+ NFSPROC4_CLNT_CB_NULL = 0,
+ NFSPROC4_CLNT_CB_RECALL,
+ NFSPROC4_CLNT_CB_SEQUENCE,
+};
+
+
struct nfsd4_compound_state;
struct nfsd_net;
@@ -531,12 +544,12 @@ extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
extern __be32 nfs4_check_open_reclaim(clientid_t *clid,
struct nfsd4_compound_state *cstate, struct nfsd_net *nn);
extern int set_callback_cred(void);
-void nfsd4_run_cb_null(struct work_struct *w);
-void nfsd4_run_cb_recall(struct work_struct *w);
extern void nfsd4_probe_callback(struct nfs4_client *clp);
extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
-extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
+extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
+ struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
+extern void nfsd4_run_cb(struct nfsd4_callback *cb);
extern int nfsd4_create_callback_queue(void);
extern void nfsd4_destroy_callback_queue(void);
extern void nfsd4_shutdown_callback(struct nfs4_client *);
@@ -545,13 +558,16 @@ extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
struct nfsd_net *nn);
extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
+/* grace period management */
+void nfsd4_end_grace(struct nfsd_net *nn);
+
/* nfs4recover operations */
extern int nfsd4_client_tracking_init(struct net *net);
extern void nfsd4_client_tracking_exit(struct net *net);
extern void nfsd4_client_record_create(struct nfs4_client *clp);
extern void nfsd4_client_record_remove(struct nfs4_client *clp);
extern int nfsd4_client_record_check(struct nfs4_client *clp);
-extern void nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time);
+extern void nfsd4_record_grace_done(struct nfsd_net *nn);
/* nfs fault injection functions */
#ifdef CONFIG_NFSD_FAULT_INJECTION
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index f501a9b5c9df..965cffd17a0c 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -445,6 +445,16 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
if (err)
goto out;
size_change = 1;
+
+ /*
+ * RFC5661, Section 18.30.4:
+ * Changing the size of a file with SETATTR indirectly
+ * changes the time_modify and change attributes.
+ *
+ * (and similar for the older RFCs)
+ */
+ if (iap->ia_size != i_size_read(inode))
+ iap->ia_valid |= ATTR_MTIME;
}
iap->ia_valid |= ATTR_CTIME;
@@ -649,6 +659,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
{
struct path path;
struct inode *inode;
+ struct file *file;
int flags = O_RDONLY|O_LARGEFILE;
__be32 err;
int host_err = 0;
@@ -703,19 +714,25 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
else
flags = O_WRONLY|O_LARGEFILE;
}
- *filp = dentry_open(&path, flags, current_cred());
- if (IS_ERR(*filp)) {
- host_err = PTR_ERR(*filp);
- *filp = NULL;
- } else {
- host_err = ima_file_check(*filp, may_flags);
- if (may_flags & NFSD_MAY_64BIT_COOKIE)
- (*filp)->f_mode |= FMODE_64BITHASH;
- else
- (*filp)->f_mode |= FMODE_32BITHASH;
+ file = dentry_open(&path, flags, current_cred());
+ if (IS_ERR(file)) {
+ host_err = PTR_ERR(file);
+ goto out_nfserr;
}
+ host_err = ima_file_check(file, may_flags);
+ if (host_err) {
+ nfsd_close(file);
+ goto out_nfserr;
+ }
+
+ if (may_flags & NFSD_MAY_64BIT_COOKIE)
+ file->f_mode |= FMODE_64BITHASH;
+ else
+ file->f_mode |= FMODE_32BITHASH;
+
+ *filp = file;
out_nfserr:
err = nfserrno(host_err);
out:
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 465e7799742a..5720e9457f33 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -428,6 +428,17 @@ struct nfsd4_reclaim_complete {
u32 rca_one_fs;
};
+struct nfsd4_seek {
+ /* request */
+ stateid_t seek_stateid;
+ loff_t seek_offset;
+ u32 seek_whence;
+
+ /* response */
+ u32 seek_eof;
+ loff_t seek_pos;
+};
+
struct nfsd4_op {
int opnum;
__be32 status;
@@ -473,6 +484,9 @@ struct nfsd4_op {
struct nfsd4_reclaim_complete reclaim_complete;
struct nfsd4_test_stateid test_stateid;
struct nfsd4_free_stateid free_stateid;
+
+ /* NFSv4.2 */
+ struct nfsd4_seek seek;
} u;
struct nfs4_replay * replay;
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 19:31:49 +0100