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net: abstract out normal and compat msghdr import

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This splits it into two parts, one that imports the message, and one
that imports the iovec. This allows a caller to only do the first part,
and import the iovec manually afterwards.

No functional changes in this patch.

Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2020-02-27 08:11:20 -07:00
parent 4d954c258a
commit 0a384abfae
4 changed files with 51 additions and 11 deletions
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3
include/net/compat.h
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@@ -38,6 +38,9 @@ struct compat_cmsghdr {
#define compat_mmsghdr mmsghdr
#endif /* defined(CONFIG_COMPAT) */
int __get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg,
struct sockaddr __user **save_addr, compat_uptr_t *ptr,
compat_size_t *len);
int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *,
struct sockaddr __user **, struct iovec **);
struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval);