summaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
authorJens Axboe <axboe@kernel.dk>2019-05-14 16:02:22 -0600
committerJens Axboe <axboe@kernel.dk>2019-05-31 15:30:03 -0600
commit87e5e6dab6c2a21fab2620f37786276d202e2ce0 (patch)
tree617496186deb33cc30c77506130bc21973c77710 /fs
parent61939b12dc24d0ac958020f261046c35a16e0c48 (diff)
uio: make import_iovec()/compat_import_iovec() return bytes on success
Currently these functions return < 0 on error, and 0 for success. Change that so that we return < 0 on error, but number of bytes for success. Some callers already treat the return value that way, others need a slight tweak. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
-rw-r--r--fs/aio.c9
-rw-r--r--fs/io_uring.c16
-rw-r--r--fs/splice.c8
3 files changed, 17 insertions, 16 deletions
diff --git a/fs/aio.c b/fs/aio.c
index 3490d1fa0e16..41824c710b36 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1479,8 +1479,9 @@ static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb)
return 0;
}
-static int aio_setup_rw(int rw, const struct iocb *iocb, struct iovec **iovec,
- bool vectored, bool compat, struct iov_iter *iter)
+static ssize_t aio_setup_rw(int rw, const struct iocb *iocb,
+ struct iovec **iovec, bool vectored, bool compat,
+ struct iov_iter *iter)
{
void __user *buf = (void __user *)(uintptr_t)iocb->aio_buf;
size_t len = iocb->aio_nbytes;
@@ -1537,7 +1538,7 @@ static int aio_read(struct kiocb *req, const struct iocb *iocb,
return -EINVAL;
ret = aio_setup_rw(READ, iocb, &iovec, vectored, compat, &iter);
- if (ret)
+ if (ret < 0)
return ret;
ret = rw_verify_area(READ, file, &req->ki_pos, iov_iter_count(&iter));
if (!ret)
@@ -1565,7 +1566,7 @@ static int aio_write(struct kiocb *req, const struct iocb *iocb,
return -EINVAL;
ret = aio_setup_rw(WRITE, iocb, &iovec, vectored, compat, &iter);
- if (ret)
+ if (ret < 0)
return ret;
ret = rw_verify_area(WRITE, file, &req->ki_pos, iov_iter_count(&iter));
if (!ret) {
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 0fbb486a320e..23e08c10f486 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1003,9 +1003,9 @@ static int io_import_fixed(struct io_ring_ctx *ctx, int rw,
return 0;
}
-static int io_import_iovec(struct io_ring_ctx *ctx, int rw,
- const struct sqe_submit *s, struct iovec **iovec,
- struct iov_iter *iter)
+static ssize_t io_import_iovec(struct io_ring_ctx *ctx, int rw,
+ const struct sqe_submit *s, struct iovec **iovec,
+ struct iov_iter *iter)
{
const struct io_uring_sqe *sqe = s->sqe;
void __user *buf = u64_to_user_ptr(READ_ONCE(sqe->addr));
@@ -1023,7 +1023,7 @@ static int io_import_iovec(struct io_ring_ctx *ctx, int rw,
opcode = READ_ONCE(sqe->opcode);
if (opcode == IORING_OP_READ_FIXED ||
opcode == IORING_OP_WRITE_FIXED) {
- int ret = io_import_fixed(ctx, rw, sqe, iter);
+ ssize_t ret = io_import_fixed(ctx, rw, sqe, iter);
*iovec = NULL;
return ret;
}
@@ -1089,7 +1089,7 @@ static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
struct iov_iter iter;
struct file *file;
size_t iov_count;
- int ret;
+ ssize_t ret;
ret = io_prep_rw(req, s, force_nonblock);
if (ret)
@@ -1102,7 +1102,7 @@ static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
return -EINVAL;
ret = io_import_iovec(req->ctx, READ, s, &iovec, &iter);
- if (ret)
+ if (ret < 0)
return ret;
iov_count = iov_iter_count(&iter);
@@ -1136,7 +1136,7 @@ static int io_write(struct io_kiocb *req, const struct sqe_submit *s,
struct iov_iter iter;
struct file *file;
size_t iov_count;
- int ret;
+ ssize_t ret;
ret = io_prep_rw(req, s, force_nonblock);
if (ret)
@@ -1149,7 +1149,7 @@ static int io_write(struct io_kiocb *req, const struct sqe_submit *s,
return -EINVAL;
ret = io_import_iovec(req->ctx, WRITE, s, &iovec, &iter);
- if (ret)
+ if (ret < 0)
return ret;
iov_count = iov_iter_count(&iter);
diff --git a/fs/splice.c b/fs/splice.c
index 14cb602d9a2f..98412721f056 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1356,7 +1356,7 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov,
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
struct iov_iter iter;
- long error;
+ ssize_t error;
struct fd f;
int type;
@@ -1367,7 +1367,7 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov,
error = import_iovec(type, uiov, nr_segs,
ARRAY_SIZE(iovstack), &iov, &iter);
- if (!error) {
+ if (error >= 0) {
error = do_vmsplice(f.file, &iter, flags);
kfree(iov);
}
@@ -1382,7 +1382,7 @@ COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, io
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
struct iov_iter iter;
- long error;
+ ssize_t error;
struct fd f;
int type;
@@ -1393,7 +1393,7 @@ COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, io
error = compat_import_iovec(type, iov32, nr_segs,
ARRAY_SIZE(iovstack), &iov, &iter);
- if (!error) {
+ if (error >= 0) {
error = do_vmsplice(f.file, &iter, flags);
kfree(iov);
}