@@ -40,70 +40,6 @@ static int flush_racache(struct inode *inode)
return ret;
}
-/*
- * Copy to client-core's address space from the buffers specified
- * by the iovec upto total_size bytes.
- * NOTE: the iovector can either contain addresses which
- * can futher be kernel-space or user-space addresses.
- * or it can pointers to struct page's
- */
-static int precopy_buffers(int buffer_index,
- struct iov_iter *iter,
- size_t total_size)
-{
- int ret = 0;
- /*
- * copy data from application/kernel by pulling it out
- * of the iovec.
- */
-
-
- if (total_size) {
- ret = orangefs_bufmap_copy_from_iovec(iter,
- buffer_index,
- total_size);
- if (ret < 0)
- gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
- __func__,
- (long)ret);
- }
-
- if (ret < 0)
- gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
- __func__,
- (long)ret);
- return ret;
-}
-
-/*
- * Copy from client-core's address space to the buffers specified
- * by the iovec upto total_size bytes.
- * NOTE: the iovector can either contain addresses which
- * can futher be kernel-space or user-space addresses.
- * or it can pointers to struct page's
- */
-static int postcopy_buffers(int buffer_index,
- struct iov_iter *iter,
- size_t total_size)
-{
- int ret = 0;
- /*
- * copy data to application/kernel by pushing it out to
- * the iovec. NOTE; target buffers can be addresses or
- * struct page pointers.
- */
- if (total_size) {
- ret = orangefs_bufmap_copy_to_iovec(iter,
- buffer_index,
- total_size);
- if (ret < 0)
- gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
- __func__,
- (long)ret);
- }
- return ret;
-}
-
/*
* Post and wait for the I/O upcall to finish
*/
@@ -156,14 +92,15 @@ static ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inod
total_size);
/*
* Stage 1: copy the buffers into client-core's address space
- * precopy_buffers only pertains to writes.
*/
- if (type == ORANGEFS_IO_WRITE) {
- ret = precopy_buffers(buffer_index,
- iter,
- total_size);
- if (ret < 0)
+ if (type == ORANGEFS_IO_WRITE && total_size) {
+ ret = orangefs_bufmap_copy_from_iovec(iter, buffer_index,
+ total_size);
+ if (ret < 0) {
+ gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
+ __func__, (long)ret);
goto out;
+ }
}
gossip_debug(GOSSIP_FILE_DEBUG,
@@ -259,14 +196,20 @@ static ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inod
/*
* Stage 3: Post copy buffers from client-core's address space
- * postcopy_buffers only pertains to reads.
*/
- if (type == ORANGEFS_IO_READ) {
- ret = postcopy_buffers(buffer_index,
- iter,
- new_op->downcall.resp.io.amt_complete);
- if (ret < 0)
+ if (type == ORANGEFS_IO_READ && new_op->downcall.resp.io.amt_complete) {
+ /*
+ * NOTE: the iovector can either contain addresses which
+ * can futher be kernel-space or user-space addresses.
+ * or it can pointers to struct page's
+ */
+ ret = orangefs_bufmap_copy_to_iovec(iter, buffer_index,
+ new_op->downcall.resp.io.amt_complete);
+ if (ret < 0) {
+ gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
+ __func__, (long)ret);
goto out;
+ }
}
gossip_debug(GOSSIP_FILE_DEBUG,
"%s(%pU): Amount %s, returned by the sys-io call:%d\n",
Signed-off-by: Martin Brandenburg <martin@omnibond.com> --- fs/orangefs/file.c | 95 +++++++++++------------------------------------------- 1 file changed, 19 insertions(+), 76 deletions(-)