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-rw-r--r--fs/nfsd/nfsctl.c202
1 files changed, 201 insertions, 1 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index a13e81e450..87fed75808 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -26,6 +26,7 @@
#include "pnfs.h"
#include "filecache.h"
#include "trace.h"
+#include "netlink.h"
/*
* We have a single directory with several nodes in it.
@@ -1140,7 +1141,7 @@ static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode)
/* 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_set_ctime_current(inode);
+ simple_inode_init_ts(inode);
switch (mode & S_IFMT) {
case S_IFDIR:
inode->i_fop = &simple_dir_operations;
@@ -1504,6 +1505,200 @@ static int create_proc_exports_entry(void)
unsigned int nfsd_net_id;
/**
+ * nfsd_nl_rpc_status_get_start - Prepare rpc_status_get dumpit
+ * @cb: netlink metadata and command arguments
+ *
+ * Return values:
+ * %0: The rpc_status_get command may proceed
+ * %-ENODEV: There is no NFSD running in this namespace
+ */
+int nfsd_nl_rpc_status_get_start(struct netlink_callback *cb)
+{
+ struct nfsd_net *nn = net_generic(sock_net(cb->skb->sk), nfsd_net_id);
+ int ret = -ENODEV;
+
+ mutex_lock(&nfsd_mutex);
+ if (nn->nfsd_serv)
+ ret = 0;
+ else
+ mutex_unlock(&nfsd_mutex);
+
+ return ret;
+}
+
+static int nfsd_genl_rpc_status_compose_msg(struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct nfsd_genl_rqstp *rqstp)
+{
+ void *hdr;
+ u32 i;
+
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ &nfsd_nl_family, 0, NFSD_CMD_RPC_STATUS_GET);
+ if (!hdr)
+ return -ENOBUFS;
+
+ if (nla_put_be32(skb, NFSD_A_RPC_STATUS_XID, rqstp->rq_xid) ||
+ nla_put_u32(skb, NFSD_A_RPC_STATUS_FLAGS, rqstp->rq_flags) ||
+ nla_put_u32(skb, NFSD_A_RPC_STATUS_PROG, rqstp->rq_prog) ||
+ nla_put_u32(skb, NFSD_A_RPC_STATUS_PROC, rqstp->rq_proc) ||
+ nla_put_u8(skb, NFSD_A_RPC_STATUS_VERSION, rqstp->rq_vers) ||
+ nla_put_s64(skb, NFSD_A_RPC_STATUS_SERVICE_TIME,
+ ktime_to_us(rqstp->rq_stime),
+ NFSD_A_RPC_STATUS_PAD))
+ return -ENOBUFS;
+
+ switch (rqstp->rq_saddr.sa_family) {
+ case AF_INET: {
+ const struct sockaddr_in *s_in, *d_in;
+
+ s_in = (const struct sockaddr_in *)&rqstp->rq_saddr;
+ d_in = (const struct sockaddr_in *)&rqstp->rq_daddr;
+ if (nla_put_in_addr(skb, NFSD_A_RPC_STATUS_SADDR4,
+ s_in->sin_addr.s_addr) ||
+ nla_put_in_addr(skb, NFSD_A_RPC_STATUS_DADDR4,
+ d_in->sin_addr.s_addr) ||
+ nla_put_be16(skb, NFSD_A_RPC_STATUS_SPORT,
+ s_in->sin_port) ||
+ nla_put_be16(skb, NFSD_A_RPC_STATUS_DPORT,
+ d_in->sin_port))
+ return -ENOBUFS;
+ break;
+ }
+ case AF_INET6: {
+ const struct sockaddr_in6 *s_in, *d_in;
+
+ s_in = (const struct sockaddr_in6 *)&rqstp->rq_saddr;
+ d_in = (const struct sockaddr_in6 *)&rqstp->rq_daddr;
+ if (nla_put_in6_addr(skb, NFSD_A_RPC_STATUS_SADDR6,
+ &s_in->sin6_addr) ||
+ nla_put_in6_addr(skb, NFSD_A_RPC_STATUS_DADDR6,
+ &d_in->sin6_addr) ||
+ nla_put_be16(skb, NFSD_A_RPC_STATUS_SPORT,
+ s_in->sin6_port) ||
+ nla_put_be16(skb, NFSD_A_RPC_STATUS_DPORT,
+ d_in->sin6_port))
+ return -ENOBUFS;
+ break;
+ }
+ }
+
+ for (i = 0; i < rqstp->rq_opcnt; i++)
+ if (nla_put_u32(skb, NFSD_A_RPC_STATUS_COMPOUND_OPS,
+ rqstp->rq_opnum[i]))
+ return -ENOBUFS;
+
+ genlmsg_end(skb, hdr);
+ return 0;
+}
+
+/**
+ * nfsd_nl_rpc_status_get_dumpit - Handle rpc_status_get dumpit
+ * @skb: reply buffer
+ * @cb: netlink metadata and command arguments
+ *
+ * Returns the size of the reply or a negative errno.
+ */
+int nfsd_nl_rpc_status_get_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct nfsd_net *nn = net_generic(sock_net(skb->sk), nfsd_net_id);
+ int i, ret, rqstp_index = 0;
+
+ rcu_read_lock();
+
+ for (i = 0; i < nn->nfsd_serv->sv_nrpools; i++) {
+ struct svc_rqst *rqstp;
+
+ if (i < cb->args[0]) /* already consumed */
+ continue;
+
+ rqstp_index = 0;
+ list_for_each_entry_rcu(rqstp,
+ &nn->nfsd_serv->sv_pools[i].sp_all_threads,
+ rq_all) {
+ struct nfsd_genl_rqstp genl_rqstp;
+ unsigned int status_counter;
+
+ if (rqstp_index++ < cb->args[1]) /* already consumed */
+ continue;
+ /*
+ * Acquire rq_status_counter before parsing the rqst
+ * fields. rq_status_counter is set to an odd value in
+ * order to notify the consumers the rqstp fields are
+ * meaningful.
+ */
+ status_counter =
+ smp_load_acquire(&rqstp->rq_status_counter);
+ if (!(status_counter & 1))
+ continue;
+
+ genl_rqstp.rq_xid = rqstp->rq_xid;
+ genl_rqstp.rq_flags = rqstp->rq_flags;
+ genl_rqstp.rq_vers = rqstp->rq_vers;
+ genl_rqstp.rq_prog = rqstp->rq_prog;
+ genl_rqstp.rq_proc = rqstp->rq_proc;
+ genl_rqstp.rq_stime = rqstp->rq_stime;
+ genl_rqstp.rq_opcnt = 0;
+ memcpy(&genl_rqstp.rq_daddr, svc_daddr(rqstp),
+ sizeof(struct sockaddr));
+ memcpy(&genl_rqstp.rq_saddr, svc_addr(rqstp),
+ sizeof(struct sockaddr));
+
+#ifdef CONFIG_NFSD_V4
+ if (rqstp->rq_vers == NFS4_VERSION &&
+ rqstp->rq_proc == NFSPROC4_COMPOUND) {
+ /* NFSv4 compound */
+ struct nfsd4_compoundargs *args;
+ int j;
+
+ args = rqstp->rq_argp;
+ genl_rqstp.rq_opcnt = args->opcnt;
+ for (j = 0; j < genl_rqstp.rq_opcnt; j++)
+ genl_rqstp.rq_opnum[j] =
+ args->ops[j].opnum;
+ }
+#endif /* CONFIG_NFSD_V4 */
+
+ /*
+ * Acquire rq_status_counter before reporting the rqst
+ * fields to the user.
+ */
+ if (smp_load_acquire(&rqstp->rq_status_counter) !=
+ status_counter)
+ continue;
+
+ ret = nfsd_genl_rpc_status_compose_msg(skb, cb,
+ &genl_rqstp);
+ if (ret)
+ goto out;
+ }
+ }
+
+ cb->args[0] = i;
+ cb->args[1] = rqstp_index;
+ ret = skb->len;
+out:
+ rcu_read_unlock();
+
+ return ret;
+}
+
+/**
+ * nfsd_nl_rpc_status_get_done - rpc_status_get dumpit post-processing
+ * @cb: netlink metadata and command arguments
+ *
+ * Return values:
+ * %0: Success
+ */
+int nfsd_nl_rpc_status_get_done(struct netlink_callback *cb)
+{
+ mutex_unlock(&nfsd_mutex);
+
+ return 0;
+}
+
+/**
* nfsd_net_init - Prepare the nfsd_net portion of a new net namespace
* @net: a freshly-created network namespace
*
@@ -1597,6 +1792,10 @@ static int __init init_nfsd(void)
retval = register_filesystem(&nfsd_fs_type);
if (retval)
goto out_free_all;
+ retval = genl_register_family(&nfsd_nl_family);
+ if (retval)
+ goto out_free_all;
+
return 0;
out_free_all:
nfsd4_destroy_laundry_wq();
@@ -1621,6 +1820,7 @@ out_free_slabs:
static void __exit exit_nfsd(void)
{
+ genl_unregister_family(&nfsd_nl_family);
unregister_filesystem(&nfsd_fs_type);
nfsd4_destroy_laundry_wq();
unregister_cld_notifier();
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 08:21:17 +0000