9p: switch p9_client_write() to passing it struct iov_iter *
... and make it loop until it's done
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index b401337..75a2bb0 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -36,6 +36,7 @@
#include <linux/utsname.h>
#include <asm/uaccess.h>
#include <linux/idr.h>
+#include <linux/uio.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
@@ -457,24 +458,20 @@
const char __user *data, size_t count,
loff_t *offset, int invalidate)
{
- int n;
- loff_t i_size;
- size_t total = 0;
loff_t origin = *offset;
- unsigned long pg_start, pg_end;
+ struct iovec iov = {.iov_base = (void __user *)data, .iov_len = count};
+ struct iov_iter from;
+ int total, err = 0;
p9_debug(P9_DEBUG_VFS, "data %p count %d offset %x\n",
data, (int)count, (int)*offset);
- do {
- n = p9_client_write(fid, NULL, data+total, origin+total, count);
- if (n <= 0)
- break;
- count -= n;
- total += n;
- } while (count > 0);
+ iov_iter_init(&from, WRITE, &iov, 1, count);
+ total = p9_client_write(fid, origin, &from, &err);
if (invalidate && (total > 0)) {
+ loff_t i_size;
+ unsigned long pg_start, pg_end;
pg_start = origin >> PAGE_CACHE_SHIFT;
pg_end = (origin + total - 1) >> PAGE_CACHE_SHIFT;
if (inode->i_mapping && inode->i_mapping->nrpages)
@@ -487,10 +484,7 @@
i_size_write(inode, *offset);
}
}
- if (n < 0)
- return n;
-
- return total;
+ return total ? total : err;
}
/**