diff options
| author |   Kirill Tkhai <ktkhai@virtuozzo.com> | 2019-12-09 13:03:46 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-12-12 17:04:55 -0800 |
| commit | 3c32da19a858fb1ae8a76bf899160be49f338506 (patch) | |
| tree | e7a0f84416fbb8b900c24d2d063a2eac6be9513f /include/net | |
| parent | net: Allow to show socket-specific information in /proc/[pid]/fdinfo/[fd] (diff) | |
| download | linux-dev-3c32da19a858fb1ae8a76bf899160be49f338506.tar.xz linux-dev-3c32da19a858fb1ae8a76bf899160be49f338506.zip | |
unix: Show number of pending scm files of receive queue in fdinfo
Unix sockets like a block box. You never know what is stored there:
there may be a file descriptor holding a mount or a block device,
or there may be whole universes with namespaces, sockets with receive
queues full of sockets etc.
The patch adds a little debug and accounts number of files (not recursive),
which is in receive queue of a unix socket. Sometimes this is useful
to determine, that socket should be investigated or which task should
be killed to put reference counter on a resourse.
v2: Pass correct argument to lockdep
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/af_unix.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/net/af_unix.h b/include/net/af_unix.h index 3426d6dacc45..17e10fba2152 100644 --- a/include/net/af_unix.h +++ b/include/net/af_unix.h @@ -41,6 +41,10 @@ struct unix_skb_parms { u32 consumed; } __randomize_layout; +struct scm_stat { + u32 nr_fds; +}; + #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb)) #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) @@ -65,6 +69,7 @@ struct unix_sock { #define UNIX_GC_MAYBE_CYCLE 1 struct socket_wq peer_wq; wait_queue_entry_t peer_wake; + struct scm_stat scm_stat; }; static inline struct unix_sock *unix_sk(const struct sock *sk) |