NFS: remove user_addr, user_count, and pos from nfs_direct_req

Make the user_addr, user_count, and pos parameters explicit to the
scheduler routines, and remove the fields from nfs_direct_req.  The
iovec API will be passing in a series of these, not just one set.

Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 8 insertions, 21 deletions

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 7101405713e1..e4c9e03aff12 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -73,9 +73,6 @@ struct nfs_direct_req {
         struct nfs_open_context *ctx;           /* file open context info */
         struct kiocb *          iocb;           /* controlling i/o request */
         struct inode *          inode;          /* target file of i/o */
-        unsigned long           user_addr;      /* location of user's buffer */
-        size_t                  user_count;     /* total bytes to move */
-        loff_t                  pos;            /* starting offset in file */
         struct page **          pages;          /* pages in our buffer */
         unsigned int            npages;         /* count of pages */
 
@@ -327,19 +324,17 @@ static const struct rpc_call_ops nfs_read_direct_ops = {
  * For each nfs_read_data struct that was allocated on the list, dispatch
  * an NFS READ operation
  */
-static void nfs_direct_read_schedule(struct nfs_direct_req *dreq)
+static void nfs_direct_read_schedule(struct nfs_direct_req *dreq, unsigned long user_addr, size_t count, loff_t pos)
 {
         struct nfs_open_context *ctx = dreq->ctx;
         struct inode *inode = ctx->dentry->d_inode;
         struct list_head *list = &dreq->list;
         struct page **pages = dreq->pages;
-        size_t count = dreq->user_count;
-        loff_t pos = dreq->pos;
         size_t rsize = NFS_SERVER(inode)->rsize;
         unsigned int curpage, pgbase;
 
         curpage = 0;
-        pgbase = dreq->user_addr & ~PAGE_MASK;
+        pgbase = user_addr & ~PAGE_MASK;
         do {
                 struct nfs_read_data *data;
                 size_t bytes;
@@ -403,9 +398,6 @@ static ssize_t nfs_direct_read(struct kiocb *iocb, unsigned long user_addr, size
         if (!dreq)
                 return -ENOMEM;
 
-        dreq->user_addr = user_addr;
-        dreq->user_count = count;
-        dreq->pos = pos;
         dreq->pages = pages;
         dreq->npages = nr_pages;
         dreq->inode = inode;
@@ -415,7 +407,7 @@ static ssize_t nfs_direct_read(struct kiocb *iocb, unsigned long user_addr, size
 
         nfs_add_stats(inode, NFSIOS_DIRECTREADBYTES, count);
         rpc_clnt_sigmask(clnt, &oldset);
-        nfs_direct_read_schedule(dreq);
+        nfs_direct_read_schedule(dreq, user_addr, count, pos);
         result = nfs_direct_wait(dreq);
         rpc_clnt_sigunmask(clnt, &oldset);
 
@@ -516,8 +508,8 @@ static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
         data->cred = dreq->ctx->cred;
 
         data->args.fh = NFS_FH(data->inode);
-        data->args.offset = dreq->pos;
-        data->args.count = dreq->user_count;
+        data->args.offset = 0;
+        data->args.count = 0;
         data->res.count = 0;
         data->res.fattr = &data->fattr;
         data->res.verf = &data->verf;
@@ -675,19 +667,17 @@ static const struct rpc_call_ops nfs_write_direct_ops = {
  * For each nfs_write_data struct that was allocated on the list, dispatch
  * an NFS WRITE operation
  */
-static void nfs_direct_write_schedule(struct nfs_direct_req *dreq, int sync)
+static void nfs_direct_write_schedule(struct nfs_direct_req *dreq, unsigned long user_addr, size_t count, loff_t pos, int sync)
 {
         struct nfs_open_context *ctx = dreq->ctx;
         struct inode *inode = ctx->dentry->d_inode;
         struct list_head *list = &dreq->list;
         struct page **pages = dreq->pages;
-        size_t count = dreq->user_count;
-        loff_t pos = dreq->pos;
         size_t wsize = NFS_SERVER(inode)->wsize;
         unsigned int curpage, pgbase;
 
         curpage = 0;
-        pgbase = dreq->user_addr & ~PAGE_MASK;
+        pgbase = user_addr & ~PAGE_MASK;
         do {
                 struct nfs_write_data *data;
                 size_t bytes;
@@ -756,9 +746,6 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, unsigned long user_addr, siz
         if (dreq->commit_data == NULL || count < wsize)
                 sync = FLUSH_STABLE;
 
-        dreq->user_addr = user_addr;
-        dreq->user_count = count;
-        dreq->pos = pos;
         dreq->pages = pages;
         dreq->npages = nr_pages;
         dreq->inode = inode;
@@ -771,7 +758,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, unsigned long user_addr, siz
         nfs_begin_data_update(inode);
 
         rpc_clnt_sigmask(clnt, &oldset);
-        nfs_direct_write_schedule(dreq, sync);
+        nfs_direct_write_schedule(dreq, user_addr, count, pos, sync);
         result = nfs_direct_wait(dreq);
         rpc_clnt_sigunmask(clnt, &oldset);