De-dupliate some code and allow for passing the flags argument to
vfs_iter_read. Additional it properly updates atime now.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/block/loop.c | 4 ++--
drivers/target/target_core_file.c | 2 +-
fs/coda/file.c | 2 +-
fs/read_write.c | 29 +++++++++--------------------
include/linux/fs.h | 3 ++-
5 files changed, 15 insertions(+), 25 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 28d932906f24..1070e851ad9a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -342,7 +342,7 @@ static int lo_read_simple(struct loop_device *lo, struct request *rq,
rq_for_each_segment(bvec, rq, iter) {
iov_iter_bvec(&i, ITER_BVEC, &bvec, 1, bvec.bv_len);
- len = vfs_iter_read(lo->lo_backing_file, &i, &pos);
+ len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0);
if (len < 0)
return len;
@@ -383,7 +383,7 @@ static int lo_read_transfer(struct loop_device *lo, struct request *rq,
b.bv_len = bvec.bv_len;
iov_iter_bvec(&i, ITER_BVEC, &b, 1, b.bv_len);
- len = vfs_iter_read(lo->lo_backing_file, &i, &pos);
+ len = vfs_iter_read(lo->lo_backing_file, &i, &pos, 0);
if (len < 0) {
ret = len;
goto out_free_page;
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index 73b8f93a5fef..2befc0d7fdb1 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -275,7 +275,7 @@ static int fd_do_rw(struct se_cmd *cmd, struct file *fd,
if (is_write)
ret = vfs_iter_write(fd, &iter, &pos);
else
- ret = vfs_iter_read(fd, &iter, &pos);
+ ret = vfs_iter_read(fd, &iter, &pos, 0);
if (is_write) {
if (ret < 0 || ret != data_length) {
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 9d956cd6d46f..f1102822bcfd 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -34,7 +34,7 @@ coda_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
- return vfs_iter_read(cfi->cfi_container, to, &iocb->ki_pos);
+ return vfs_iter_read(cfi->cfi_container, to, &iocb->ki_pos, 0);
}
static ssize_t
diff --git a/fs/read_write.c b/fs/read_write.c
index 60c64a996ab2..620ac6f9dacb 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -356,26 +356,6 @@ SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
}
#endif
-ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos)
-{
- struct kiocb kiocb;
- ssize_t ret;
-
- if (!file->f_op->read_iter)
- return -EINVAL;
-
- init_sync_kiocb(&kiocb, file);
- kiocb.ki_pos = *ppos;
-
- iter->type |= READ;
- ret = call_read_iter(file, &kiocb, iter);
- BUG_ON(ret == -EIOCBQUEUED);
- if (ret > 0)
- *ppos = kiocb.ki_pos;
- return ret;
-}
-EXPORT_SYMBOL(vfs_iter_read);
-
ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos)
{
struct kiocb kiocb;
@@ -955,6 +935,15 @@ static ssize_t do_iter_read(struct file *file, struct iov_iter *iter,
return ret;
}
+ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos,
+ int flags)
+{
+ if (!file->f_op->read_iter)
+ return -EINVAL;
+ return do_iter_read(file, iter, ppos, flags);
+}
+EXPORT_SYMBOL(vfs_iter_read);
+
static ssize_t do_iter_write(struct file *file, struct iov_iter *iter,
loff_t *pos, int flags)
{
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 803e5a9b2654..3f6a4f4efb32 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2789,7 +2789,8 @@ extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);
extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *);
extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t);
-ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos);
+ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos,
+ int flags);
ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos);
/* fs/block_dev.c */
--
2.11.0
--
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