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| author |   Pavel Begunkov <asml.silence@gmail.com> | 2022-07-12 21:52:29 +0100 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2022-07-19 14:20:42 -0700 |
| commit | 7c701d92b2b5e5175dbfec875816474b802b0c45 (patch) | |
| tree | 974616dd04936290206960cea47e7366b1bc0392 | |
| parent | skbuff: add SKBFL_DONT_ORPHAN flag (diff) | |
| download | linux-dev-7c701d92b2b5e5175dbfec875816474b802b0c45.tar.xz linux-dev-7c701d92b2b5e5175dbfec875816474b802b0c45.zip | |
skbuff: carry external ubuf_info in msghdr
Make possible for network in-kernel callers like io_uring to pass in a
custom ubuf_info by setting it in a new field of struct msghdr.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/linux/socket.h | 1 | ||||
| -rw-r--r-- | net/compat.c | 1 | ||||
| -rw-r--r-- | net/socket.c | 2 |
3 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 17311ad9f9af..7bac9fc1cee0 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -69,6 +69,7 @@ struct msghdr { unsigned int msg_flags; /* flags on received message */ __kernel_size_t msg_controllen; /* ancillary data buffer length */ struct kiocb *msg_iocb; /* ptr to iocb for async requests */ + struct ubuf_info *msg_ubuf; }; struct user_msghdr { diff --git a/net/compat.c b/net/compat.c index 210fc3b4d0d8..6cd2e7683dd0 100644 --- a/net/compat.c +++ b/net/compat.c @@ -80,6 +80,7 @@ int __get_compat_msghdr(struct msghdr *kmsg, return -EMSGSIZE; kmsg->msg_iocb = NULL; + kmsg->msg_ubuf = NULL; *ptr = msg.msg_iov; *len = msg.msg_iovlen; return 0; diff --git a/net/socket.c b/net/socket.c index 96300cdc0625..82af3882b876 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2106,6 +2106,7 @@ int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags, msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_namelen = 0; + msg.msg_ubuf = NULL; if (addr) { err = move_addr_to_kernel(addr, addr_len, &address); if (err < 0) @@ -2405,6 +2406,7 @@ int __copy_msghdr_from_user(struct msghdr *kmsg, return -EMSGSIZE; kmsg->msg_iocb = NULL; + kmsg->msg_ubuf = NULL; *uiov = msg.msg_iov; *nsegs = msg.msg_iovlen; return 0; |