[PATCH 03/24] Revert "pnfs: Enable O_DIRECT read path."

Fred Isaman
2010-06-08T04:19:45Z

This reverts commit fe1dbd120b6a94bbacec205d0a4ae40d36e314b5.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
---
fs/nfs/direct.c | 26 +-------------------------
1 files changed, 1 insertions(+), 25 deletions(-)

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 1148214..3ef9b0c 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -56,7 +56,6 @@

#include "internal.h"
#include "iostat.h"
-#include "pnfs.h"

#define NFSDBG_FACILITY NFSDBG_VFS

@@ -329,17 +328,6 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
unsigned int pgbase;
int result;
ssize_t started = 0;
- size_t pnfs_stripe_rem = count;
- enum pnfs_try_status trypnfs;
-
- /* pnfs_stripe_rem will be set to the remaining bytes in
- * the first stripe_unit (which for standard nfs is count)
- */
- pnfs_direct_init_io(inode, ctx, count, pos, 0, &rsize,
- &pnfs_stripe_rem);
-
- dprintk("%s: pos %llu count %Zu wsize %Zu\n",
- __func__, pos, count, rsize);

do {
struct nfs_read_data *data;
@@ -347,12 +335,6 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,

pgbase = user_addr & ~PAGE_MASK;
bytes = min(rsize,count);
-#if defined(CONFIG_NFS_V4_1)
- if (pnfs_enabled_sb(NFS_SERVER(inode))) {
- bytes = min(bytes, pnfs_stripe_rem);
- pnfs_stripe_rem = rsize;
- }
-#endif /* CONFIG_NFS_V4_1 */

result = -ENOMEM;
data = nfs_readdata_alloc(nfs_page_array_len(pgbase, bytes));
@@ -393,14 +375,8 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
data->res.eof = 0;
data->res.count = bytes;

- trypnfs = pnfs_try_to_read_data(data, &nfs_read_direct_ops);
- if (trypnfs == PNFS_ATTEMPTED) {
- result = pnfs_get_read_status(data);
- if (result)
- break;
- } else if (nfs_direct_read_execute(data, &task_setup_data, &msg)) {
+ if (nfs_direct_read_execute(data, &task_setup_data, &msg))
break;
- }

started += bytes;
user_addr += bytes;
--
1.6.6.1