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authorLinus Torvalds <torvalds@linux-foundation.org>2020-03-30 12:18:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-03-30 12:18:49 -0700
commite59cd88028dbd41472453e5883f78330aa73c56e (patch)
tree5576a15b6cf3e70df7cf6d0a2d7711b4bc0417ed /net/socket.c
parent1592614838cb52f4313ceff64894e2ca78591498 (diff)
parent3d9932a8b240c9019f48358e8a6928c53c2c7f6b (diff)
Merge tag 'for-5.7/io_uring-2020-03-29' of git://git.kernel.dk/linux-block
Pull io_uring updates from Jens Axboe: "Here are the io_uring changes for this merge window. Light on new features this time around (just splice + buffer selection), lots of cleanups, fixes, and improvements to existing support. In particular, this contains: - Cleanup fixed file update handling for stack fallback (Hillf) - Re-work of how pollable async IO is handled, we no longer require thread offload to handle that. Instead we rely using poll to drive this, with task_work execution. - In conjunction with the above, allow expendable buffer selection, so that poll+recv (for example) no longer has to be a split operation. - Make sure we honor RLIMIT_FSIZE for buffered writes - Add support for splice (Pavel) - Linked work inheritance fixes and optimizations (Pavel) - Async work fixes and cleanups (Pavel) - Improve io-wq locking (Pavel) - Hashed link write improvements (Pavel) - SETUP_IOPOLL|SETUP_SQPOLL improvements (Xiaoguang)" * tag 'for-5.7/io_uring-2020-03-29' of git://git.kernel.dk/linux-block: (54 commits) io_uring: cleanup io_alloc_async_ctx() io_uring: fix missing 'return' in comment io-wq: handle hashed writes in chains io-uring: drop 'free_pfile' in struct io_file_put io-uring: drop completion when removing file io_uring: Fix ->data corruption on re-enqueue io-wq: close cancel gap for hashed linked work io_uring: make spdxcheck.py happy io_uring: honor original task RLIMIT_FSIZE io-wq: hash dependent work io-wq: split hashing and enqueueing io-wq: don't resched if there is no work io-wq: remove duplicated cancel code io_uring: fix truncated async read/readv and write/writev retry io_uring: dual license io_uring.h uapi header io_uring: io_uring_enter(2) don't poll while SETUP_IOPOLL|SETUP_SQPOLL enabled io_uring: Fix unused function warnings io_uring: add end-of-bits marker and build time verify it io_uring: provide means of removing buffers io_uring: add IOSQE_BUFFER_SELECT support for IORING_OP_RECVMSG ...
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c25
1 files changed, 21 insertions, 4 deletions
diff --git a/net/socket.c b/net/socket.c
index 2eecf1517f76..2dd739fba866 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2228,10 +2228,10 @@ struct used_address {
unsigned int name_len;
};
-static int copy_msghdr_from_user(struct msghdr *kmsg,
- struct user_msghdr __user *umsg,
- struct sockaddr __user **save_addr,
- struct iovec **iov)
+int __copy_msghdr_from_user(struct msghdr *kmsg,
+ struct user_msghdr __user *umsg,
+ struct sockaddr __user **save_addr,
+ struct iovec __user **uiov, size_t *nsegs)
{
struct user_msghdr msg;
ssize_t err;
@@ -2273,6 +2273,23 @@ static int copy_msghdr_from_user(struct msghdr *kmsg,
return -EMSGSIZE;
kmsg->msg_iocb = NULL;
+ *uiov = msg.msg_iov;
+ *nsegs = msg.msg_iovlen;
+ return 0;
+}
+
+static int copy_msghdr_from_user(struct msghdr *kmsg,
+ struct user_msghdr __user *umsg,
+ struct sockaddr __user **save_addr,
+ struct iovec **iov)
+{
+ struct user_msghdr msg;
+ ssize_t err;
+
+ err = __copy_msghdr_from_user(kmsg, umsg, save_addr, &msg.msg_iov,
+ &msg.msg_iovlen);
+ if (err)
+ return err;
err = import_iovec(save_addr ? READ : WRITE,
msg.msg_iov, msg.msg_iovlen,