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NeilBrown 0d5f35b9d0 NFS: fix disabling of swap 
[ Upstream commit 5bab56fff5 ]

When swap is activated to a file on an NFSv4 mount we arrange that the
state manager thread is always present as starting a new thread requires
memory allocations that might block waiting for swap.

Unfortunately the code for allowing the state manager thread to exit when
swap is disabled was not tested properly and does not work.
This can be seen by examining /proc/fs/nfsfs/servers after disabling swap
and unmounting the filesystem.  The servers file will still list one
entry.  Also a "ps" listing will show the state manager thread is still
present.

There are two problems.
 1/ rpc_clnt_swap_deactivate() doesn't walk up the ->cl_parent list to
    find the primary client on which the state manager runs.

 2/ The thread is not woken up properly and it immediately goes back to
    sleep without checking whether it is really needed.  Using
    nfs4_schedule_state_manager() ensures a proper wake-up.

Reported-by: Olga Kornievskaia <aglo@umich.edu>
Fixes: 4dc73c6791 ("NFSv4: keep state manager thread active if swap is enabled")
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-03-10 09:28:40 +01:00
..
6lowpan net: 6lowpan: constify lowpan_nhc structures 2022-06-09 21:53:28 +02:00
9p xen: branch for v6.2-rc4 2023-01-12 17:02:20 -06:00
802 treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
8021q net: Remove the obsolte u64_stats_fetch_*_irq() users (net). 2022-10-28 20:13:54 -07:00
appletalk net: remove noblock parameter from skb_recv_datagram() 2022-04-06 13:45:26 +01:00
atm driver core: make struct class.dev_uevent() take a const * 2022-11-24 17:12:15 +01:00
ax25 ax25: af_ax25: Remove unnecessary (void*) conversions 2022-11-16 13:31:03 +00:00
batman-adv Networking changes for 6.2. 2022-12-13 15:47:48 -08:00
bluetooth Bluetooth: L2CAP: Fix potential user-after-free 2023-03-10 09:28:17 +01:00
bpf New Feature: 2022-12-17 14:06:53 -06:00
bpfilter uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
bridge netfilter: br_netfilter: disable sabotage_in hook after first suppression 2023-01-31 13:59:36 +01:00
caif net: Remove WARN_ON_ONCE(sk->sk_forward_alloc) from sk_stream_kill_queues(). 2023-02-10 19:53:42 -08:00
can can: j1939: do not wait 250 ms if the same addr was already claimed 2023-02-07 15:00:22 +01:00
ceph Treewide: Stop corrupting socket's task_frag 2022-12-19 17:28:49 -08:00
core net: add sock_init_data_uid() 2023-03-10 09:28:16 +01:00
dcb net: dcb: move getapptrust to separate function 2022-11-15 15:27:43 +01:00
dccp dccp/tcp: Avoid negative sk_forward_alloc by ipv6_pinfo.pktoptions. 2023-02-10 19:53:42 -08:00
dns_resolver cred: Do not default to init_cred in prepare_kernel_cred() 2022-11-01 10:04:52 -07:00
dsa Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-12-13 09:49:29 +01:00
ethernet net: ethernet: use sysfs_emit() to instead of scnprintf() 2022-12-07 20:02:44 -08:00
ethtool Revert "Merge branch 'ethtool-mac-merge'" 2023-01-24 17:44:14 +01:00
hsr hsr: Use a single struct for self_node. 2022-12-01 20:26:22 -08:00
ieee802154 Merge tag 'ieee802154-for-net-next-2022-12-05' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan-next 2022-12-07 17:33:26 -08:00
ife net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
ipv4 txhash: fix sk->sk_txrehash default 2023-02-08 09:07:11 +00:00
ipv6 dccp/tcp: Avoid negative sk_forward_alloc by ipv6_pinfo.pktoptions. 2023-02-10 19:53:42 -08:00
iucv net: keep sk->sk_forward_alloc as small as possible 2022-06-10 16:21:27 -07:00
kcm kcm: close race conditions on sk_receive_queue 2022-11-15 12:42:26 +01:00
key af_key: Fix heap information leak 2023-02-13 09:30:14 +00:00
l2tp l2tp: Avoid possible recursive deadlock in l2tp_tunnel_register() 2023-03-10 09:28:24 +01:00
l3mdev l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu 2022-04-15 14:27:24 -07:00
lapb net: lapb: Use list_for_each_entry() to simplify code in lapb_iface.c 2021-06-08 16:31:25 -07:00
llc net: rename reference+tracking helpers 2022-06-09 21:52:55 -07:00
mac80211 wifi: mac80211: pass 'sta' to ieee80211_rx_data_set_sta() 2023-03-10 09:28:22 +01:00
mac802154 mac802154: Fix possible double free upon parsing error 2022-12-19 11:38:12 +01:00
mctp net: mctp: purge receive queues on sk destruction 2023-01-28 00:26:09 -08:00
mpls net: mpls: fix stale pointer if allocation fails during device rename 2023-02-15 10:26:37 +00:00
mptcp mptcp: be careful on subflow status propagation on errors 2023-02-08 09:39:34 +00:00
ncsi net/ncsi: Silence runtime memcpy() false positive warning 2022-12-06 17:29:14 -08:00
netfilter Revert "netfilter: conntrack: fix bug in for_each_sctp_chunk" 2023-01-31 14:02:48 +01:00
netlabel genetlink: start to validate reserved header bytes 2022-08-29 12:47:15 +01:00
netlink netlink: annotate data races around sk_state 2023-01-23 21:35:53 -08:00
netrom netrom: Fix use-after-free caused by accept on already connected socket 2023-01-30 07:30:47 +00:00
nfc net: nfc: Fix use-after-free in local_cleanup() 2023-01-13 20:53:44 -08:00
nsh treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
openvswitch net: openvswitch: fix possible memory leak in ovs_meter_cmd_set() 2023-02-13 09:38:25 +00:00
packet Networking changes for 6.2. 2022-12-13 15:47:48 -08:00
phonet net: remove noblock parameter from recvmsg() entities 2022-04-12 15:00:25 +02:00
psample genetlink: start to validate reserved header bytes 2022-08-29 12:47:15 +01:00
qrtr net: qrtr: free memory on error path in radix_tree_insert() 2023-01-28 00:21:32 -08:00
rds rds: rds_rm_zerocopy_callback() correct order for list_add_tail() 2023-03-10 09:28:18 +01:00
rfkill driver core: make struct class.dev_uevent() take a const * 2022-11-24 17:12:15 +01:00
rose net/rose: Fix to not accept on connected socket 2023-01-28 00:19:57 -08:00
rxrpc rxrpc: Fix overwaking on call poking 2023-03-10 09:28:17 +01:00
sched net/sched: tcindex: search key must be 16 bits 2023-02-15 10:23:54 +00:00
sctp sctp: sctp_sock_filter(): avoid list_entry() on possibly empty list 2023-02-10 19:28:29 -08:00
smc net/smc: fix application data exception 2023-03-10 09:28:24 +01:00
strparser strparser: pad sk_skb_cb to avoid straddling cachelines 2022-07-08 18:38:44 -07:00
sunrpc NFS: fix disabling of swap 2023-03-10 09:28:40 +01:00
switchdev net: rename reference+tracking helpers 2022-06-09 21:52:55 -07:00
tipc tipc: fix kernel warning when sending SYN message 2023-02-14 20:46:24 -08:00
tls net/tls: tls_is_tx_ready() checked list_entry 2023-01-30 21:06:08 -08:00
unix unix: Fix race in SOCK_SEQPACKET's unix_dgram_sendmsg() 2022-12-15 11:35:18 +01:00
vmw_vsock Networking changes for 6.2. 2022-12-13 15:47:48 -08:00
wireless wifi: cfg80211: Fix extended KCK key length check in nl80211_set_rekey_data() 2023-03-10 09:28:09 +01:00
x25 net/x25: Fix to not accept on connected socket 2023-01-25 09:51:04 +00:00
xdp xsk: check IFF_UP earlier in Tx path 2023-03-10 09:28:23 +01:00
xfrm xfrm: fix bug with DSCP copy to v6 from v4 tunnel 2023-01-30 11:31:58 +01:00
compat.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
devres.c net: devres: Correct a grammatical error 2021-06-11 12:55:28 -07:00
Kconfig Remove DECnet support from kernel 2022-08-22 14:26:30 +01:00
Kconfig.debug net: make NET_(DEV|NS)_REFCNT_TRACKER depend on NET 2022-09-20 14:23:56 -07:00
Makefile Remove DECnet support from kernel 2022-08-22 14:26:30 +01:00
socket.c net: use a bounce buffer for copying skb->mark 2023-02-14 20:31:13 -08:00
sysctl_net.c sections: move and rename core_kernel_data() to is_kernel_core_data() 2021-11-09 10:02:50 -08:00