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netlink: decode AF_UNIX unix_diag_msg attributes

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* netlink_sock_diag.c (unix_diag_msg_nla_decoders): New array.
(decode_unix_diag_msg): Use it.
* linux/unix_diag.h (unix_diag_vfs, unix_diag_rqlen): New structures.
This commit is contained in:
JingPiao Chen 2017-06-28 09:40:06 +08:00 committed by Dmitry V. Levin
parent e4cfb43cd3
commit 762bb69382
2 changed files with 82 additions and 1 deletions
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10
linux/unix_diag.h
View File

@ -37,4 +37,14 @@ enum {
UNIX_DIAG_SHUTDOWN,
};
struct unix_diag_vfs {
uint32_t udiag_vfs_ino;
uint32_t udiag_vfs_dev;
};
struct unix_diag_rqlen {
uint32_t udiag_rqueue;
uint32_t udiag_wqueue;
};
#endif /* !STRACE_LINUX_UNIX_DIAG_H */

73
netlink_sock_diag.c
View File

@ -165,6 +165,76 @@ decode_meminfo(struct tcb *const tcp,
return true;
}
static bool
decode_unix_diag_vfs(struct tcb *tcp, kernel_ulong_t addr,
kernel_ulong_t len, const void *const opaque_data)
{
struct unix_diag_vfs uv;
if (len < sizeof(uv))
return false;
if (umove_or_printaddr(tcp, addr, &uv))
return true;
tprints("{udiag_vfs_dev=");
print_dev_t(uv.udiag_vfs_dev);
tprintf(", udiag_vfs_ino=%" PRIu32 "}", uv.udiag_vfs_ino);
return true;
}
static bool
print_inode(struct tcb *tcp, void *elem_buf,
size_t elem_size, void *opaque_data)
{
tprintf("%" PRIu32, *(uint32_t *) elem_buf);
return true;
}
static bool
decode_unix_diag_inode(struct tcb *tcp, kernel_ulong_t addr,
kernel_ulong_t len, const void *const opaque_data)
{
uint32_t inode;
size_t nmemb = len / sizeof(inode);
if (!nmemb)
return false;
print_array(tcp, addr, nmemb, &inode, sizeof(inode),
umoven_or_printaddr, print_inode, 0);
return true;
}
static bool
decode_unix_diag_rqlen(struct tcb *tcp, kernel_ulong_t addr,
kernel_ulong_t len, const void *const opaque_data)
{
struct unix_diag_rqlen rql;
if (len < sizeof(rql))
return false;
if (umove_or_printaddr(tcp, addr, &rql))
return true;
tprintf("{udiag_rqueue=%" PRIu32 ", udiag_wqueue=%" PRIu32 "}",
rql.udiag_rqueue, rql.udiag_wqueue);
return true;
}
static const nla_decoder_t unix_diag_msg_nla_decoders[] = {
[UNIX_DIAG_NAME] = decode_nla_str,
[UNIX_DIAG_VFS] = decode_unix_diag_vfs,
[UNIX_DIAG_PEER] = decode_nla_u32,
[UNIX_DIAG_ICONS] = decode_unix_diag_inode,
[UNIX_DIAG_RQLEN] = decode_unix_diag_rqlen,
[UNIX_DIAG_MEMINFO] = decode_meminfo,
[UNIX_DIAG_SHUTDOWN] = decode_nla_u8
};
static void
decode_unix_diag_msg(struct tcb *const tcp,
const struct nlmsghdr *const nlmsghdr,
@ -199,7 +269,8 @@ decode_unix_diag_msg(struct tcb *const tcp,
tprints(", ");
decode_nlattr(tcp, addr + offset, len - offset,
unix_diag_attrs, "UNIX_DIAG_???",
NULL, 0, NULL);
unix_diag_msg_nla_decoders,
ARRAY_SIZE(unix_diag_msg_nla_decoders), NULL);
}
}