NFSv4.1: rearrange ->doio args
This will make it possible to clear the lseg pointer in the same function as it is put, instead of in the caller nfs_pageio_doio(). Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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a69aef1496
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c76069bda0
@ -214,7 +214,7 @@ nfs_wait_on_request(struct nfs_page *req)
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*/
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void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
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struct inode *inode,
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int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *),
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int (*doio)(struct nfs_pageio_descriptor *),
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size_t bsize,
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int io_flags)
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{
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@ -311,13 +311,7 @@ static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc,
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static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc)
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{
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if (!list_empty(&desc->pg_list)) {
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int error = desc->pg_doio(desc->pg_inode,
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&desc->pg_list,
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nfs_page_array_len(desc->pg_base,
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desc->pg_count),
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desc->pg_count,
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desc->pg_ioflags,
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desc->pg_lseg);
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int error = desc->pg_doio(desc);
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desc->pg_lseg = NULL;
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if (error < 0)
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desc->pg_error = error;
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@ -31,8 +31,8 @@
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#define NFSDBG_FACILITY NFSDBG_PAGECACHE
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static int nfs_pagein_multi(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
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static int nfs_pagein_one(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
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static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc);
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static int nfs_pagein_one(struct nfs_pageio_descriptor *desc);
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static const struct rpc_call_ops nfs_read_partial_ops;
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static const struct rpc_call_ops nfs_read_full_ops;
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@ -117,9 +117,9 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data)
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int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
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struct page *page)
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{
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LIST_HEAD(one_request);
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struct nfs_page *new;
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unsigned int len;
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struct nfs_pageio_descriptor pgio;
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len = nfs_page_length(page);
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if (len == 0)
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@ -132,11 +132,14 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
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if (len < PAGE_CACHE_SIZE)
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zero_user_segment(page, len, PAGE_CACHE_SIZE);
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nfs_list_add_request(new, &one_request);
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nfs_pageio_init(&pgio, inode, NULL, 0, 0);
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nfs_list_add_request(new, &pgio.pg_list);
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pgio.pg_count = len;
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if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE)
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nfs_pagein_multi(inode, &one_request, 1, len, 0, NULL);
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nfs_pagein_multi(&pgio);
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else
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nfs_pagein_one(inode, &one_request, 1, len, 0, NULL);
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nfs_pagein_one(&pgio);
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return 0;
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}
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@ -258,20 +261,21 @@ nfs_async_read_error(struct list_head *head)
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* won't see the new data until our attribute cache is updated. This is more
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* or less conventional NFS client behavior.
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*/
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static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags, struct pnfs_layout_segment *lseg)
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static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc)
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{
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struct nfs_page *req = nfs_list_entry(head->next);
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struct nfs_page *req = nfs_list_entry(desc->pg_list.next);
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struct page *page = req->wb_page;
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struct nfs_read_data *data;
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size_t rsize = NFS_SERVER(inode)->rsize, nbytes;
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size_t rsize = NFS_SERVER(desc->pg_inode)->rsize, nbytes;
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unsigned int offset;
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int requests = 0;
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int ret = 0;
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struct pnfs_layout_segment *lseg;
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LIST_HEAD(list);
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nfs_list_remove_request(req);
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nbytes = count;
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nbytes = desc->pg_count;
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do {
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size_t len = min(nbytes,rsize);
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@ -284,11 +288,11 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
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} while(nbytes != 0);
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atomic_set(&req->wb_complete, requests);
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/* We know lseg==NULL */
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lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ);
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BUG_ON(desc->pg_lseg != NULL);
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lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ);
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ClearPageError(page);
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offset = 0;
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nbytes = count;
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nbytes = desc->pg_count;
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do {
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int ret2;
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@ -321,14 +325,17 @@ out_bad:
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return -ENOMEM;
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}
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static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags, struct pnfs_layout_segment *lseg)
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static int nfs_pagein_one(struct nfs_pageio_descriptor *desc)
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{
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struct nfs_page *req;
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struct page **pages;
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struct nfs_read_data *data;
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struct list_head *head = &desc->pg_list;
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struct pnfs_layout_segment *lseg = desc->pg_lseg;
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int ret = -ENOMEM;
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data = nfs_readdata_alloc(npages);
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data = nfs_readdata_alloc(nfs_page_array_len(desc->pg_base,
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desc->pg_count));
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if (!data) {
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nfs_async_read_error(head);
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goto out;
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@ -344,9 +351,10 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
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}
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req = nfs_list_entry(data->pages.next);
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if ((!lseg) && list_is_singular(&data->pages))
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lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ);
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lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ);
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ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0, lseg);
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ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, desc->pg_count,
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0, lseg);
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out:
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put_lseg(lseg);
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return ret;
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@ -898,20 +898,21 @@ static void nfs_redirty_request(struct nfs_page *req)
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* Generate multiple small requests to write out a single
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* contiguous dirty area on one page.
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*/
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static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how, struct pnfs_layout_segment *lseg)
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static int nfs_flush_multi(struct nfs_pageio_descriptor *desc)
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{
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struct nfs_page *req = nfs_list_entry(head->next);
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struct nfs_page *req = nfs_list_entry(desc->pg_list.next);
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struct page *page = req->wb_page;
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struct nfs_write_data *data;
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size_t wsize = NFS_SERVER(inode)->wsize, nbytes;
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size_t wsize = NFS_SERVER(desc->pg_inode)->wsize, nbytes;
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unsigned int offset;
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int requests = 0;
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int ret = 0;
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struct pnfs_layout_segment *lseg;
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LIST_HEAD(list);
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nfs_list_remove_request(req);
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nbytes = count;
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nbytes = desc->pg_count;
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do {
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size_t len = min(nbytes, wsize);
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@ -924,11 +925,11 @@ static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned
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} while (nbytes != 0);
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atomic_set(&req->wb_complete, requests);
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BUG_ON(lseg);
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lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_RW);
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BUG_ON(desc->pg_lseg);
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lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_RW);
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ClearPageError(page);
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offset = 0;
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nbytes = count;
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nbytes = desc->pg_count;
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do {
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int ret2;
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@ -940,7 +941,7 @@ static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned
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if (nbytes < wsize)
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wsize = nbytes;
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ret2 = nfs_write_rpcsetup(req, data, &nfs_write_partial_ops,
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wsize, offset, lseg, how);
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wsize, offset, lseg, desc->pg_ioflags);
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if (ret == 0)
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ret = ret2;
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offset += wsize;
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@ -968,14 +969,17 @@ out_bad:
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* This is the case if nfs_updatepage detects a conflicting request
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* that has been written but not committed.
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*/
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static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how, struct pnfs_layout_segment *lseg)
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static int nfs_flush_one(struct nfs_pageio_descriptor *desc)
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{
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struct nfs_page *req;
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struct page **pages;
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struct nfs_write_data *data;
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struct list_head *head = &desc->pg_list;
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struct pnfs_layout_segment *lseg = desc->pg_lseg;
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int ret;
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data = nfs_writedata_alloc(npages);
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data = nfs_writedata_alloc(nfs_page_array_len(desc->pg_base,
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desc->pg_count));
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if (!data) {
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while (!list_empty(head)) {
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req = nfs_list_entry(head->next);
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@ -995,10 +999,10 @@ static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned i
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}
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req = nfs_list_entry(data->pages.next);
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if ((!lseg) && list_is_singular(&data->pages))
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lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_RW);
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lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_RW);
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/* Set up the argument struct */
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ret = nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, lseg, how);
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ret = nfs_write_rpcsetup(req, data, &nfs_write_full_ops, desc->pg_count, 0, lseg, desc->pg_ioflags);
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out:
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put_lseg(lseg); /* Cleans any gotten in ->pg_test */
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return ret;
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@ -59,7 +59,7 @@ struct nfs_pageio_descriptor {
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unsigned int pg_base;
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struct inode *pg_inode;
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int (*pg_doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
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int (*pg_doio)(struct nfs_pageio_descriptor *);
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int pg_ioflags;
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int pg_error;
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struct pnfs_layout_segment *pg_lseg;
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@ -81,7 +81,7 @@ extern int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *dst,
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pgoff_t idx_start, unsigned int npages, int tag);
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extern void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
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struct inode *inode,
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int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *),
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int (*doio)(struct nfs_pageio_descriptor *desc),
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size_t bsize,
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int how);
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extern int nfs_pageio_add_request(struct nfs_pageio_descriptor *,
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