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iov_iter: Separate type from direction and use accessor functions 

commit aa563d7bca upstream.

In the iov_iter struct, separate the iterator type from the iterator
direction and use accessor functions to access them in most places.

Convert a bunch of places to use switch-statements to access them rather
then chains of bitwise-AND statements.  This makes it easier to add further
iterator types.  Also, this can be more efficient as to implement a switch
of small contiguous integers, the compiler can use ~50% fewer compare
instructions than it has to use bitwise-and instructions.

Further, cease passing the iterator type into the iterator setup function.
The iterator function can set that itself.  Only the direction is required.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Reviewed-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Acked-by: Caspar Zhang <caspar@linux.alibaba.com>
This commit is contained in:
David Howells 2018-10-20 00:57:56 +01:00 committed by Caspar Zhang
parent 3d3148017e
commit c8b49a3879
40 changed files with 96 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/block/drbd/drbd_main.c
View File

@ -1855,7 +1855,7 @@ int drbd_send(struct drbd_connection *connection, struct socket *sock,
/* THINK if (signal_pending) return ... ? */
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iov, 1, size);
iov_iter_kvec(&msg.msg_iter, WRITE, &iov, 1, size);
if (sock == connection->data.socket) {
rcu_read_lock();

2
drivers/block/drbd/drbd_receiver.c
View File

@ -516,7 +516,7 @@ static int drbd_recv_short(struct socket *sock, void *buf, size_t size, int flag
struct msghdr msg = {
.msg_flags = (flags ? flags : MSG_WAITALL | MSG_NOSIGNAL)
};
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, size);
iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, size);
return sock_recvmsg(sock, &msg, msg.msg_flags);
}

9
drivers/block/loop.c
View File

@ -268,7 +268,7 @@ static int lo_write_bvec(struct file *file, struct bio_vec *bvec, loff_t *ppos)
struct iov_iter i;
ssize_t bw;
iov_iter_bvec(&i, ITER_BVEC | WRITE, bvec, 1, bvec->bv_len);
iov_iter_bvec(&i, WRITE, bvec, 1, bvec->bv_len);
file_start_write(file);
bw = vfs_iter_write(file, &i, ppos, 0);
@ -346,7 +346,7 @@ static int lo_read_simple(struct loop_device *lo, struct request *rq,
ssize_t len;
rq_for_each_segment(bvec, rq, iter) {
iov_iter_bvec(&i, ITER_BVEC, &bvec, 1, bvec.bv_len);
iov_iter_bvec(&i, READ, &bvec, 1, bvec.bv_len);
len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0);
if (len < 0)
return len;
@ -387,7 +387,7 @@ static int lo_read_transfer(struct loop_device *lo, struct request *rq,
b.bv_offset = 0;
b.bv_len = bvec.bv_len;
iov_iter_bvec(&i, ITER_BVEC, &b, 1, b.bv_len);
iov_iter_bvec(&i, READ, &b, 1, b.bv_len);
len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0);
if (len < 0) {
ret = len;
@ -554,8 +554,7 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
}
atomic_set(&cmd->ref, 2);
iov_iter_bvec(&iter, ITER_BVEC | rw, bvec,
segments, blk_rq_bytes(rq));
iov_iter_bvec(&iter, rw, bvec, segments, blk_rq_bytes(rq));
iter.iov_offset = offset;
cmd->iocb.ki_pos = pos;

12
drivers/block/nbd.c
View File

@ -477,7 +477,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
u32 nbd_cmd_flags = 0;
int sent = nsock->sent, skip = 0;
iov_iter_kvec(&from, WRITE | ITER_KVEC, &iov, 1, sizeof(request));
iov_iter_kvec(&from, WRITE, &iov, 1, sizeof(request));
switch (req_op(req)) {
case REQ_OP_DISCARD:
@ -568,8 +568,7 @@ send_pages:
dev_dbg(nbd_to_dev(nbd), "request %p: sending %d bytes data\n",
req, bvec.bv_len);
iov_iter_bvec(&from, ITER_BVEC | WRITE,
&bvec, 1, bvec.bv_len);
iov_iter_bvec(&from, WRITE, &bvec, 1, bvec.bv_len);
if (skip) {
if (skip >= iov_iter_count(&from)) {
skip -= iov_iter_count(&from);
@ -628,7 +627,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
int ret = 0;
reply.magic = 0;
iov_iter_kvec(&to, READ | ITER_KVEC, &iov, 1, sizeof(reply));
iov_iter_kvec(&to, READ, &iov, 1, sizeof(reply));
result = sock_xmit(nbd, index, 0, &to, MSG_WAITALL, NULL);
if (result <= 0) {
if (!nbd_disconnected(config))
@ -688,8 +687,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
struct bio_vec bvec;
rq_for_each_segment(bvec, req, iter) {
iov_iter_bvec(&to, ITER_BVEC | READ,
&bvec, 1, bvec.bv_len);
iov_iter_bvec(&to, READ, &bvec, 1, bvec.bv_len);
result = sock_xmit(nbd, index, 0, &to, MSG_WAITALL, NULL);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk), "Receive data failed (result %d)\n",
@ -1107,7 +1105,7 @@ static void send_disconnects(struct nbd_device *nbd)
for (i = 0; i < config->num_connections; i++) {
struct nbd_sock *nsock = config->socks[i];
iov_iter_kvec(&from, WRITE | ITER_KVEC, &iov, 1, sizeof(request));
iov_iter_kvec(&from, WRITE, &iov, 1, sizeof(request));
mutex_lock(&nsock->tx_lock);
ret = sock_xmit(nbd, i, 1, &from, 0, NULL);
if (ret <= 0)

4
drivers/fsi/fsi-sbefifo.c
View File

@ -638,7 +638,7 @@ static void sbefifo_collect_async_ffdc(struct sbefifo *sbefifo)
}
ffdc_iov.iov_base = ffdc;
ffdc_iov.iov_len = SBEFIFO_MAX_FFDC_SIZE;
iov_iter_kvec(&ffdc_iter, WRITE | ITER_KVEC, &ffdc_iov, 1, SBEFIFO_MAX_FFDC_SIZE);
iov_iter_kvec(&ffdc_iter, WRITE, &ffdc_iov, 1, SBEFIFO_MAX_FFDC_SIZE);
cmd[0] = cpu_to_be32(2);
cmd[1] = cpu_to_be32(SBEFIFO_CMD_GET_SBE_FFDC);
rc = sbefifo_do_command(sbefifo, cmd, 2, &ffdc_iter);
@ -735,7 +735,7 @@ int sbefifo_submit(struct device *dev, const __be32 *command, size_t cmd_len,
rbytes = (*resp_len) * sizeof(__be32);
resp_iov.iov_base = response;
resp_iov.iov_len = rbytes;
iov_iter_kvec(&resp_iter, WRITE | ITER_KVEC, &resp_iov, 1, rbytes);
iov_iter_kvec(&resp_iter, WRITE, &resp_iov, 1, rbytes);
/* Perform the command */
mutex_lock(&sbefifo->lock);

3
drivers/isdn/mISDN/l1oip_core.c
View File

@ -718,8 +718,7 @@ l1oip_socket_thread(void *data)
printk(KERN_DEBUG "%s: socket created and open\n",
__func__);
while (!signal_pending(current)) {
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1,
recvbuf_size);
iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, recvbuf_size);
recvlen = sock_recvmsg(socket, &msg, 0);
if (recvlen > 0) {
l1oip_socket_parse(hc, &sin_rx, recvbuf, recvlen);

6
drivers/misc/vmw_vmci/vmci_queue_pair.c
View File

@ -3030,7 +3030,7 @@ ssize_t vmci_qpair_enqueue(struct vmci_qp *qpair,
if (!qpair || !buf)
return VMCI_ERROR_INVALID_ARGS;
iov_iter_kvec(&from, WRITE | ITER_KVEC, &v, 1, buf_size);
iov_iter_kvec(&from, WRITE, &v, 1, buf_size);
qp_lock(qpair);
@ -3074,7 +3074,7 @@ ssize_t vmci_qpair_dequeue(struct vmci_qp *qpair,
if (!qpair || !buf)
return VMCI_ERROR_INVALID_ARGS;
iov_iter_kvec(&to, READ | ITER_KVEC, &v, 1, buf_size);
iov_iter_kvec(&to, READ, &v, 1, buf_size);
qp_lock(qpair);
@ -3119,7 +3119,7 @@ ssize_t vmci_qpair_peek(struct vmci_qp *qpair,
if (!qpair || !buf)
return VMCI_ERROR_INVALID_ARGS;
iov_iter_kvec(&to, READ | ITER_KVEC, &v, 1, buf_size);
iov_iter_kvec(&to, READ, &v, 1, buf_size);
qp_lock(qpair);

2
drivers/nvme/target/io-cmd-file.c
View File

@ -101,7 +101,7 @@ static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos,
rw = READ;
}
iov_iter_bvec(&iter, ITER_BVEC | rw, req->f.bvec, nr_segs, count);
iov_iter_bvec(&iter, rw, req->f.bvec, nr_segs, count);
iocb->ki_pos = pos;
iocb->ki_filp = req->ns->file;

6
drivers/target/iscsi/iscsi_target_util.c
View File

@ -1258,8 +1258,7 @@ static int iscsit_do_rx_data(
return -1;
memset(&msg, 0, sizeof(struct msghdr));
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC,
count->iov, count->iov_count, data);
iov_iter_kvec(&msg.msg_iter, READ, count->iov, count->iov_count, data);
while (msg_data_left(&msg)) {
rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL);
@ -1315,8 +1314,7 @@ int tx_data(
memset(&msg, 0, sizeof(struct msghdr));
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC,
iov, iov_count, data);
iov_iter_kvec(&msg.msg_iter, WRITE, iov, iov_count, data);
while (msg_data_left(&msg)) {
int tx_loop = sock_sendmsg(conn->sock, &msg);

6
drivers/target/target_core_file.c
View File

@ -303,7 +303,7 @@ fd_execute_rw_aio(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
len += sg->length;
}
iov_iter_bvec(&iter, ITER_BVEC | is_write, bvec, sgl_nents, len);
iov_iter_bvec(&iter, is_write, bvec, sgl_nents, len);
aio_cmd->cmd = cmd;
aio_cmd->len = len;
@ -353,7 +353,7 @@ static int fd_do_rw(struct se_cmd *cmd, struct file *fd,
len += sg->length;
}
iov_iter_bvec(&iter, ITER_BVEC, bvec, sgl_nents, len);
iov_iter_bvec(&iter, READ, bvec, sgl_nents, len);
if (is_write)
ret = vfs_iter_write(fd, &iter, &pos, 0);
else
@ -490,7 +490,7 @@ fd_execute_write_same(struct se_cmd *cmd)
len += se_dev->dev_attrib.block_size;
}
iov_iter_bvec(&iter, ITER_BVEC, bvec, nolb, len);
iov_iter_bvec(&iter, READ, bvec, nolb, len);
ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos, 0);
kfree(bvec);

2
drivers/usb/usbip/usbip_common.c
View File

@ -309,7 +309,7 @@ int usbip_recv(struct socket *sock, void *buf, int size)
if (!sock || !buf || !size)
return -EINVAL;
iov_iter_kvec(&msg.msg_iter, READ|ITER_KVEC, &iov, 1, size);
iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, size);
usbip_dbg_xmit("enter\n");

8
drivers/xen/pvcalls-back.c
View File

@ -137,13 +137,13 @@ static void pvcalls_conn_back_read(void *opaque)
if (masked_prod < masked_cons) {
vec[0].iov_base = data->in + masked_prod;
vec[0].iov_len = wanted;
iov_iter_kvec(&msg.msg_iter, ITER_KVEC|WRITE, vec, 1, wanted);
iov_iter_kvec(&msg.msg_iter, WRITE, vec, 1, wanted);
} else {
vec[0].iov_base = data->in + masked_prod;
vec[0].iov_len = array_size - masked_prod;
vec[1].iov_base = data->in;
vec[1].iov_len = wanted - vec[0].iov_len;
iov_iter_kvec(&msg.msg_iter, ITER_KVEC|WRITE, vec, 2, wanted);
iov_iter_kvec(&msg.msg_iter, WRITE, vec, 2, wanted);
}
atomic_set(&map->read, 0);
@ -196,13 +196,13 @@ static void pvcalls_conn_back_write(struct sock_mapping *map)
if (pvcalls_mask(prod, array_size) > pvcalls_mask(cons, array_size)) {
vec[0].iov_base = data->out + pvcalls_mask(cons, array_size);
vec[0].iov_len = size;
iov_iter_kvec(&msg.msg_iter, ITER_KVEC|READ, vec, 1, size);
iov_iter_kvec(&msg.msg_iter, READ, vec, 1, size);
} else {
vec[0].iov_base = data->out + pvcalls_mask(cons, array_size);
vec[0].iov_len = array_size - pvcalls_mask(cons, array_size);
vec[1].iov_base = data->out;
vec[1].iov_len = size - vec[0].iov_len;
iov_iter_kvec(&msg.msg_iter, ITER_KVEC|READ, vec, 2, size);
iov_iter_kvec(&msg.msg_iter, READ, vec, 2, size);
}
atomic_set(&map->write, 0);

4
fs/9p/vfs_addr.c
View File

@ -66,7 +66,7 @@ static int v9fs_fid_readpage(void *data, struct page *page)
if (retval == 0)
return retval;
iov_iter_bvec(&to, ITER_BVEC | READ, &bvec, 1, PAGE_SIZE);
iov_iter_bvec(&to, READ, &bvec, 1, PAGE_SIZE);
retval = p9_client_read(fid, page_offset(page), &to, &err);
if (err) {
@ -177,7 +177,7 @@ static int v9fs_vfs_writepage_locked(struct page *page)
bvec.bv_page = page;
bvec.bv_offset = 0;
bvec.bv_len = len;
iov_iter_bvec(&from, ITER_BVEC | WRITE, &bvec, 1, len);
iov_iter_bvec(&from, WRITE, &bvec, 1, len);
/* We should have writeback_fid always set */
BUG_ON(!v9inode->writeback_fid);

2
fs/9p/vfs_dir.c
View File

@ -123,7 +123,7 @@ static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
if (rdir->tail == rdir->head) {
struct iov_iter to;
int n;
iov_iter_kvec(&to, READ | ITER_KVEC, &kvec, 1, buflen);
iov_iter_kvec(&to, READ, &kvec, 1, buflen);
n = p9_client_read(file->private_data, ctx->pos, &to,
&err);
if (err)

4
fs/9p/xattr.c
View File

@ -32,7 +32,7 @@ ssize_t v9fs_fid_xattr_get(struct p9_fid *fid, const char *name,
struct iov_iter to;
int err;
iov_iter_kvec(&to, READ | ITER_KVEC, &kvec, 1, buffer_size);
iov_iter_kvec(&to, READ, &kvec, 1, buffer_size);
attr_fid = p9_client_xattrwalk(fid, name, &attr_size);
if (IS_ERR(attr_fid)) {
@ -107,7 +107,7 @@ int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
struct iov_iter from;
int retval, err;
iov_iter_kvec(&from, WRITE | ITER_KVEC, &kvec, 1, value_len);
iov_iter_kvec(&from, WRITE, &kvec, 1, value_len);
p9_debug(P9_DEBUG_VFS, "name = %s value_len = %zu flags = %d\n",
name, value_len, flags);

15
fs/afs/rxrpc.c
View File

@ -286,7 +286,7 @@ static void afs_load_bvec(struct afs_call *call, struct msghdr *msg,
offset = 0;
}
iov_iter_bvec(&msg->msg_iter, WRITE | ITER_BVEC, bv, nr, bytes);
iov_iter_bvec(&msg->msg_iter, WRITE, bv, nr, bytes);
}
/*
@ -401,8 +401,7 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
msg.msg_name = NULL;
msg.msg_namelen = 0;
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, iov, 1,
call->request_size);
iov_iter_kvec(&msg.msg_iter, WRITE, iov, 1, call->request_size);
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = MSG_WAITALL | (call->send_pages ? MSG_MORE : 0);
@ -432,7 +431,7 @@ error_do_abort:
rxrpc_kernel_abort_call(call->net->socket, rxcall,
RX_USER_ABORT, ret, "KSD");
} else {
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, NULL, 0, 0);
iov_iter_kvec(&msg.msg_iter, READ, NULL, 0, 0);
rxrpc_kernel_recv_data(call->net->socket, rxcall,
&msg.msg_iter, false,
&call->abort_code, &call->service_id);
@ -468,7 +467,7 @@ static void afs_deliver_to_call(struct afs_call *call)
if (state == AFS_CALL_SV_AWAIT_ACK) {
struct iov_iter iter;
iov_iter_kvec(&iter, READ | ITER_KVEC, NULL, 0, 0);
iov_iter_kvec(&iter, READ, NULL, 0, 0);
ret = rxrpc_kernel_recv_data(call->net->socket,
call->rxcall, &iter, false,
&remote_abort,
@ -828,7 +827,7 @@ void afs_send_empty_reply(struct afs_call *call)
msg.msg_name = NULL;
msg.msg_namelen = 0;
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, NULL, 0, 0);
iov_iter_kvec(&msg.msg_iter, WRITE, NULL, 0, 0);
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
@ -867,7 +866,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
iov[0].iov_len = len;
msg.msg_name = NULL;
msg.msg_namelen = 0;
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, iov, 1, len);
iov_iter_kvec(&msg.msg_iter, WRITE, iov, 1, len);
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
@ -908,7 +907,7 @@ int afs_extract_data(struct afs_call *call, void *buf, size_t count,
iov.iov_base = buf + call->offset;
iov.iov_len = count - call->offset;
iov_iter_kvec(&iter, ITER_KVEC | READ, &iov, 1, count - call->offset);
iov_iter_kvec(&iter, READ, &iov, 1, count - call->offset);
ret = rxrpc_kernel_recv_data(net->socket, call->rxcall, &iter,
want_more, &remote_abort,

5
fs/ceph/file.c
View File

@ -821,7 +821,7 @@ static void ceph_aio_complete_req(struct ceph_osd_request *req)
aio_req->total_len = rc + zlen;
}
iov_iter_bvec(&i, ITER_BVEC, osd_data->bvec_pos.bvecs,
iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs,
osd_data->num_bvecs,
osd_data->bvec_pos.iter.bi_size);
iov_iter_advance(&i, rc);
@ -1044,8 +1044,7 @@ ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
int zlen = min_t(size_t, len - ret,
size - pos - ret);
iov_iter_bvec(&i, ITER_BVEC, bvecs, num_pages,
len);
iov_iter_bvec(&i, READ, bvecs, num_pages, len);
iov_iter_advance(&i, ret);
iov_iter_zero(zlen, &i);
ret += zlen;

4
fs/cifs/connect.c
View File

@ -663,7 +663,7 @@ cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
{
struct msghdr smb_msg;
struct kvec iov = {.iov_base = buf, .iov_len = to_read};
iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, &iov, 1, to_read);
iov_iter_kvec(&smb_msg.msg_iter, READ, &iov, 1, to_read);
return cifs_readv_from_socket(server, &smb_msg);
}
@ -675,7 +675,7 @@ cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page,
struct msghdr smb_msg;
struct bio_vec bv = {
.bv_page = page, .bv_len = to_read, .bv_offset = page_offset};
iov_iter_bvec(&smb_msg.msg_iter, READ | ITER_BVEC, &bv, 1, to_read);
iov_iter_bvec(&smb_msg.msg_iter, READ, &bv, 1, to_read);
return cifs_readv_from_socket(server, &smb_msg);
}

2
fs/cifs/misc.c
View File

@ -879,7 +879,7 @@ setup_aio_ctx_iter(struct cifs_aio_ctx *ctx, struct iov_iter *iter, int rw)
ctx->bv = bv;
ctx->len = saved_len - count;
ctx->npages = npages;
iov_iter_bvec(&ctx->iter, ITER_BVEC | rw, ctx->bv, npages, ctx->len);
iov_iter_bvec(&ctx->iter, rw, ctx->bv, npages, ctx->len);
return 0;
}

4
fs/cifs/smb2ops.c
View File

@ -3072,13 +3072,13 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
return 0;
}
iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
} else if (buf_len >= data_offset + data_len) {
/* read response payload is in buf */
WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
iov.iov_base = buf + data_offset;
iov.iov_len = data_len;
iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
} else {
/* read response payload cannot be in both buf and pages */
WARN_ONCE(1, "buf can not contain only a part of read data");

8
fs/cifs/transport.c
View File

@ -310,8 +310,7 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
.iov_base = &rfc1002_marker,
.iov_len = 4
};
iov_iter_kvec(&smb_msg.msg_iter, WRITE | ITER_KVEC, &hiov,
1, 4);
iov_iter_kvec(&smb_msg.msg_iter, WRITE, &hiov, 1, 4);
rc = smb_send_kvec(server, &smb_msg, &sent);
if (rc < 0)
goto uncork;
@ -332,8 +331,7 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
size += iov[i].iov_len;
}
iov_iter_kvec(&smb_msg.msg_iter, WRITE | ITER_KVEC,
iov, n_vec, size);
iov_iter_kvec(&smb_msg.msg_iter, WRITE, iov, n_vec, size);
rc = smb_send_kvec(server, &smb_msg, &sent);
if (rc < 0)
@ -349,7 +347,7 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
rqst_page_get_length(&rqst[j], i, &bvec.bv_len,
&bvec.bv_offset);
iov_iter_bvec(&smb_msg.msg_iter, WRITE | ITER_BVEC,
iov_iter_bvec(&smb_msg.msg_iter, WRITE,
&bvec, 1, bvec.bv_len);
rc = smb_send_kvec(server, &smb_msg, &sent);
if (rc < 0)

2
fs/dlm/lowcomms.c
View File

@ -674,7 +674,7 @@ static int receive_from_sock(struct connection *con)
nvec = 2;
}
len = iov[0].iov_len + iov[1].iov_len;
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, iov, nvec, len);
iov_iter_kvec(&msg.msg_iter, READ, iov, nvec, len);
r = ret = sock_recvmsg(con->sock, &msg, MSG_DONTWAIT | MSG_NOSIGNAL);
if (ret <= 0)

4
fs/nfsd/vfs.c
View File

@ -936,7 +936,7 @@ __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp,
int host_err;
trace_nfsd_read_vector(rqstp, fhp, offset, *count);
iov_iter_kvec(&iter, READ | ITER_KVEC, vec, vlen, *count);
iov_iter_kvec(&iter, READ, vec, vlen, *count);
host_err = vfs_iter_read(file, &iter, &offset, 0);
return nfsd_finish_read(rqstp, fhp, file, offset, count, host_err);
}
@ -1012,7 +1012,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
if (stable && !use_wgather)
flags |= RWF_SYNC;
iov_iter_kvec(&iter, WRITE | ITER_KVEC, vec, vlen, *cnt);
iov_iter_kvec(&iter, WRITE, vec, vlen, *cnt);
host_err = vfs_iter_write(file, &iter, &pos, flags);
if (host_err < 0)
goto out_nfserr;

2
fs/ocfs2/cluster/tcp.c
View File

@ -916,7 +916,7 @@ static int o2net_recv_tcp_msg(struct socket *sock, void *data, size_t len)
{
struct kvec vec = { .iov_len = len, .iov_base = data, };
struct msghdr msg = { .msg_flags = MSG_DONTWAIT, };
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1, len);
iov_iter_kvec(&msg.msg_iter, READ, &vec, 1, len);
return sock_recvmsg(sock, &msg, MSG_DONTWAIT);
}

2
fs/orangefs/inode.c
View File

@ -25,7 +25,7 @@ static int read_one_page(struct page *page)
struct iov_iter to;
struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
iov_iter_bvec(&to, ITER_BVEC | READ, &bv, 1, PAGE_SIZE);
iov_iter_bvec(&to, READ, &bv, 1, PAGE_SIZE);
gossip_debug(GOSSIP_INODE_DEBUG,
"orangefs_readpage called with page %p\n",

7
fs/splice.c
View File

@ -301,7 +301,7 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
struct kiocb kiocb;
int idx, ret;
iov_iter_pipe(&to, ITER_PIPE | READ, pipe, len);
iov_iter_pipe(&to, READ, pipe, len);
idx = to.idx;
init_sync_kiocb(&kiocb, in);
kiocb.ki_pos = *ppos;
@ -386,7 +386,7 @@ static ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
*/
offset = *ppos & ~PAGE_MASK;
iov_iter_pipe(&to, ITER_PIPE | READ, pipe, len + offset);
iov_iter_pipe(&to, READ, pipe, len + offset);
res = iov_iter_get_pages_alloc(&to, &pages, len + offset, &base);
if (res <= 0)
@ -745,8 +745,7 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
left -= this_len;
}
iov_iter_bvec(&from, ITER_BVEC | WRITE, array, n,
sd.total_len - left);
iov_iter_bvec(&from, WRITE, array, n, sd.total_len - left);
ret = vfs_iter_write(out, &from, &sd.pos, 0);
if (ret <= 0)
break;

10
include/linux/uio.h
View File

@ -29,7 +29,7 @@ enum iter_type {
};
struct iov_iter {
int type;
unsigned int type;
size_t iov_offset;
size_t count;
union {
@ -212,13 +212,13 @@ size_t copy_to_iter_mcsafe(void *addr, size_t bytes, struct iov_iter *i)
size_t iov_iter_zero(size_t bytes, struct iov_iter *);
unsigned long iov_iter_alignment(const struct iov_iter *i);
unsigned long iov_iter_gap_alignment(const struct iov_iter *i);
void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov,
void iov_iter_init(struct iov_iter *i, unsigned int direction, const struct iovec *iov,
unsigned long nr_segs, size_t count);
void iov_iter_kvec(struct iov_iter *i, int direction, const struct kvec *kvec,
void iov_iter_kvec(struct iov_iter *i, unsigned int direction, const struct kvec *kvec,
unsigned long nr_segs, size_t count);
void iov_iter_bvec(struct iov_iter *i, int direction, const struct bio_vec *bvec,
void iov_iter_bvec(struct iov_iter *i, unsigned int direction, const struct bio_vec *bvec,
unsigned long nr_segs, size_t count);
void iov_iter_pipe(struct iov_iter *i, int direction, struct pipe_inode_info *pipe,
void iov_iter_pipe(struct iov_iter *i, unsigned int direction, struct pipe_inode_info *pipe,
size_t count);
ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages,
size_t maxsize, unsigned maxpages, size_t *start);

28
lib/iov_iter.c
View File

@ -428,17 +428,19 @@ int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes)
}
EXPORT_SYMBOL(iov_iter_fault_in_readable);
void iov_iter_init(struct iov_iter *i, int direction,
void iov_iter_init(struct iov_iter *i, unsigned int direction,
const struct iovec *iov, unsigned long nr_segs,
size_t count)
{
WARN_ON(direction & ~(READ | WRITE));
direction &= READ | WRITE;
/* It will get better. Eventually... */
if (uaccess_kernel()) {
direction |= ITER_KVEC;
i->type = direction;
i->type = ITER_KVEC | direction;
i->kvec = (struct kvec *)iov;
} else {
i->type = direction;
i->type = ITER_IOVEC | direction;
i->iov = iov;
}
i->nr_segs = nr_segs;
@ -1073,12 +1075,12 @@ size_t iov_iter_single_seg_count(const struct iov_iter *i)
}
EXPORT_SYMBOL(iov_iter_single_seg_count);
void iov_iter_kvec(struct iov_iter *i, int direction,
void iov_iter_kvec(struct iov_iter *i, unsigned int direction,
const struct kvec *kvec, unsigned long nr_segs,
size_t count)
{
BUG_ON(!(direction & ITER_KVEC));
i->type = direction;
WARN_ON(direction & ~(READ | WRITE));
i->type = ITER_KVEC | (direction & (READ | WRITE));
i->kvec = kvec;
i->nr_segs = nr_segs;
i->iov_offset = 0;
@ -1086,12 +1088,12 @@ void iov_iter_kvec(struct iov_iter *i, int direction,
}
EXPORT_SYMBOL(iov_iter_kvec);
void iov_iter_bvec(struct iov_iter *i, int direction,
void iov_iter_bvec(struct iov_iter *i, unsigned int direction,
const struct bio_vec *bvec, unsigned long nr_segs,
size_t count)
{
BUG_ON(!(direction & ITER_BVEC));
i->type = direction;
WARN_ON(direction & ~(READ | WRITE));
i->type = ITER_BVEC | (direction & (READ | WRITE));
i->bvec = bvec;
i->nr_segs = nr_segs;
i->iov_offset = 0;
@ -1099,13 +1101,13 @@ void iov_iter_bvec(struct iov_iter *i, int direction,
}
EXPORT_SYMBOL(iov_iter_bvec);
void iov_iter_pipe(struct iov_iter *i, int direction,
void iov_iter_pipe(struct iov_iter *i, unsigned int direction,
struct pipe_inode_info *pipe,
size_t count)
{
BUG_ON(direction != ITER_PIPE);
BUG_ON(direction != READ);
WARN_ON(pipe->nrbufs == pipe->buffers);
i->type = direction;
i->type = ITER_PIPE | READ;
i->pipe = pipe;
i->idx = (pipe->curbuf + pipe->nrbufs) & (pipe->buffers - 1);
i->iov_offset = 0;

2
mm/page_io.c
View File

@ -294,7 +294,7 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
};
struct iov_iter from;
iov_iter_bvec(&from, ITER_BVEC | WRITE, &bv, 1, PAGE_SIZE);
iov_iter_bvec(&from, WRITE, &bv, 1, PAGE_SIZE);
init_sync_kiocb(&kiocb, swap_file);
kiocb.ki_pos = page_file_offset(page);

2
net/9p/client.c
View File

@ -2088,7 +2088,7 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)
struct kvec kv = {.iov_base = data, .iov_len = count};
struct iov_iter to;
iov_iter_kvec(&to, READ | ITER_KVEC, &kv, 1, count);
iov_iter_kvec(&to, READ, &kv, 1, count);
p9_debug(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n",
fid->fid, (unsigned long long) offset, count);

2
net/bluetooth/6lowpan.c
View File

@ -473,7 +473,7 @@ static int send_pkt(struct l2cap_chan *chan, struct sk_buff *skb,
iv.iov_len = skb->len;
memset(&msg, 0, sizeof(msg));
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iv, 1, skb->len);
iov_iter_kvec(&msg.msg_iter, WRITE, &iv, 1, skb->len);
err = l2cap_chan_send(chan, &msg, skb->len);
if (err > 0) {

2
net/bluetooth/a2mp.c
View File

@ -63,7 +63,7 @@ static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *dat
memset(&msg, 0, sizeof(msg));
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, &iv, 1, total_len);
iov_iter_kvec(&msg.msg_iter, WRITE, &iv, 1, total_len);
l2cap_chan_send(chan, &msg, total_len);

2
net/bluetooth/smp.c
View File

@ -622,7 +622,7 @@ static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data)
memset(&msg, 0, sizeof(msg));
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC, iv, 2, 1 + len);
iov_iter_kvec(&msg.msg_iter, WRITE, iv, 2, 1 + len);
l2cap_chan_send(chan, &msg, 1 + len);

6
net/ceph/messenger.c
View File

@ -526,7 +526,7 @@ static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len)
if (!buf)
msg.msg_flags |= MSG_TRUNC;
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, len);
iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, len);
r = sock_recvmsg(sock, &msg, msg.msg_flags);
if (r == -EAGAIN)
r = 0;
@ -545,7 +545,7 @@ static int ceph_tcp_recvpage(struct socket *sock, struct page *page,
int r;
BUG_ON(page_offset + length > PAGE_SIZE);
iov_iter_bvec(&msg.msg_iter, READ | ITER_BVEC, &bvec, 1, length);
iov_iter_bvec(&msg.msg_iter, READ, &bvec, 1, length);
r = sock_recvmsg(sock, &msg, msg.msg_flags);
if (r == -EAGAIN)
r = 0;
@ -613,7 +613,7 @@ static int ceph_tcp_sendpage(struct socket *sock, struct page *page,
else
msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */
iov_iter_bvec(&msg.msg_iter, WRITE | ITER_BVEC, &bvec, 1, size);
iov_iter_bvec(&msg.msg_iter, WRITE, &bvec, 1, size);
ret = sock_sendmsg(sock, &msg);
if (ret == -EAGAIN)
ret = 0;

2
net/netfilter/ipvs/ip_vs_sync.c
View File

@ -1620,7 +1620,7 @@ ip_vs_receive(struct socket *sock, char *buffer, const size_t buflen)
EnterFunction(7);
/* Receive a packet */
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, buflen);
iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, buflen);
len = sock_recvmsg(sock, &msg, MSG_DONTWAIT);
if (len < 0)
return len;

4
net/smc/smc_clc.c
View File

@ -286,7 +286,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
*/
krflags = MSG_PEEK | MSG_WAITALL;
smc->clcsock->sk->sk_rcvtimeo = CLC_WAIT_TIME;
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1,
iov_iter_kvec(&msg.msg_iter, READ, &vec, 1,
sizeof(struct smc_clc_msg_hdr));
len = sock_recvmsg(smc->clcsock, &msg, krflags);
if (signal_pending(current)) {
@ -325,7 +325,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,
/* receive the complete CLC message */
memset(&msg, 0, sizeof(struct msghdr));
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &vec, 1, datlen);
iov_iter_kvec(&msg.msg_iter, READ, &vec, 1, datlen);
krflags = MSG_WAITALL;
len = sock_recvmsg(smc->clcsock, &msg, krflags);
if (len < datlen || !smc_clc_msg_hdr_valid(clcm)) {

6
net/socket.c
View File

@ -636,7 +636,7 @@ EXPORT_SYMBOL(sock_sendmsg);
int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t num, size_t size)
{
iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size);
iov_iter_kvec(&msg->msg_iter, WRITE, vec, num, size);
return sock_sendmsg(sock, msg);
}
EXPORT_SYMBOL(kernel_sendmsg);
@ -649,7 +649,7 @@ int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg,
if (!sock->ops->sendmsg_locked)
return sock_no_sendmsg_locked(sk, msg, size);
iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size);
iov_iter_kvec(&msg->msg_iter, WRITE, vec, num, size);
return sock->ops->sendmsg_locked(sk, msg, msg_data_left(msg));
}
@ -824,7 +824,7 @@ int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
mm_segment_t oldfs = get_fs();
int result;
iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size);
iov_iter_kvec(&msg->msg_iter, READ, vec, num, size);
set_fs(KERNEL_DS);
result = sock_recvmsg(sock, msg, flags);
set_fs(oldfs);

2
net/sunrpc/svcsock.c
View File

@ -338,7 +338,7 @@ static int svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr,
rqstp->rq_xprt_hlen = 0;
clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, iov, nr, buflen);
iov_iter_kvec(&msg.msg_iter, READ, iov, nr, buflen);
len = sock_recvmsg(svsk->sk_sock, &msg, msg.msg_flags);
/* If we read a full record, then assume there may be more
* data to read (stream based sockets only!)

2
net/tipc/topsrv.c
View File

@ -401,7 +401,7 @@ static int tipc_conn_rcv_from_sock(struct tipc_conn *con)
iov.iov_base = &s;
iov.iov_len = sizeof(s);
msg.msg_name = NULL;
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, iov.iov_len);
iov_iter_kvec(&msg.msg_iter, READ, &iov, 1, iov.iov_len);
ret = sock_recvmsg(con->sock, &msg, MSG_DONTWAIT);
if (ret == -EWOULDBLOCK)
return -EWOULDBLOCK;

4
net/tls/tls_device.c
View File

@ -492,7 +492,7 @@ int tls_device_sendpage(struct sock *sk, struct page *page,
iov.iov_base = kaddr + offset;
iov.iov_len = size;
iov_iter_kvec(&msg_iter, WRITE | ITER_KVEC, &iov, 1, size);
iov_iter_kvec(&msg_iter, WRITE, &iov, 1, size);
rc = tls_push_data(sk, &msg_iter, size,
flags, TLS_RECORD_TYPE_DATA);
kunmap(page);
@ -541,7 +541,7 @@ static int tls_device_push_pending_record(struct sock *sk, int flags)
{
struct iov_iter msg_iter;
iov_iter_kvec(&msg_iter, WRITE | ITER_KVEC, NULL, 0, 0);
iov_iter_kvec(&msg_iter, WRITE, NULL, 0, 0);
return tls_push_data(sk, &msg_iter, 0, flags, TLS_RECORD_TYPE_DATA);
}