From c76069bda0f17cd3e153e54d9ac01242909c6b15 Mon Sep 17 00:00:00 2001 From: Fred Isaman Date: Thu, 3 Mar 2011 15:13:48 +0000 Subject: [PATCH] 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 Signed-off-by: Trond Myklebust --- fs/nfs/pagelist.c | 10 ++-------- fs/nfs/read.c | 42 ++++++++++++++++++++++++---------------- fs/nfs/write.c | 28 +++++++++++++++------------ include/linux/nfs_page.h | 4 ++-- 4 files changed, 45 insertions(+), 39 deletions(-) diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 45b0fb8add39..9f628746f5c8 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -214,7 +214,7 @@ nfs_wait_on_request(struct nfs_page *req) */ void nfs_pageio_init(struct nfs_pageio_descriptor *desc, struct inode *inode, - int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *), + int (*doio)(struct nfs_pageio_descriptor *), size_t bsize, int io_flags) { @@ -311,13 +311,7 @@ static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc, static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc) { if (!list_empty(&desc->pg_list)) { - int error = desc->pg_doio(desc->pg_inode, - &desc->pg_list, - nfs_page_array_len(desc->pg_base, - desc->pg_count), - desc->pg_count, - desc->pg_ioflags, - desc->pg_lseg); + int error = desc->pg_doio(desc); desc->pg_lseg = NULL; if (error < 0) desc->pg_error = error; diff --git a/fs/nfs/read.c b/fs/nfs/read.c index f40c7f4dc16b..ab9c7768b7c6 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -31,8 +31,8 @@ #define NFSDBG_FACILITY NFSDBG_PAGECACHE -static int nfs_pagein_multi(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *); -static int nfs_pagein_one(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *); +static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc); +static int nfs_pagein_one(struct nfs_pageio_descriptor *desc); static const struct rpc_call_ops nfs_read_partial_ops; static const struct rpc_call_ops nfs_read_full_ops; @@ -117,9 +117,9 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data) int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode, struct page *page) { - LIST_HEAD(one_request); struct nfs_page *new; unsigned int len; + struct nfs_pageio_descriptor pgio; len = nfs_page_length(page); if (len == 0) @@ -132,11 +132,14 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode, if (len < PAGE_CACHE_SIZE) zero_user_segment(page, len, PAGE_CACHE_SIZE); - nfs_list_add_request(new, &one_request); + nfs_pageio_init(&pgio, inode, NULL, 0, 0); + nfs_list_add_request(new, &pgio.pg_list); + pgio.pg_count = len; + if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE) - nfs_pagein_multi(inode, &one_request, 1, len, 0, NULL); + nfs_pagein_multi(&pgio); else - nfs_pagein_one(inode, &one_request, 1, len, 0, NULL); + nfs_pagein_one(&pgio); return 0; } @@ -258,20 +261,21 @@ nfs_async_read_error(struct list_head *head) * won't see the new data until our attribute cache is updated. This is more * or less conventional NFS client behavior. */ -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) +static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc) { - struct nfs_page *req = nfs_list_entry(head->next); + struct nfs_page *req = nfs_list_entry(desc->pg_list.next); struct page *page = req->wb_page; struct nfs_read_data *data; - size_t rsize = NFS_SERVER(inode)->rsize, nbytes; + size_t rsize = NFS_SERVER(desc->pg_inode)->rsize, nbytes; unsigned int offset; int requests = 0; int ret = 0; + struct pnfs_layout_segment *lseg; LIST_HEAD(list); nfs_list_remove_request(req); - nbytes = count; + nbytes = desc->pg_count; do { size_t len = min(nbytes,rsize); @@ -284,11 +288,11 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne } while(nbytes != 0); atomic_set(&req->wb_complete, requests); - /* We know lseg==NULL */ - lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ); + BUG_ON(desc->pg_lseg != NULL); + lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ); ClearPageError(page); offset = 0; - nbytes = count; + nbytes = desc->pg_count; do { int ret2; @@ -321,14 +325,17 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne return -ENOMEM; } -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) +static int nfs_pagein_one(struct nfs_pageio_descriptor *desc) { struct nfs_page *req; struct page **pages; struct nfs_read_data *data; + struct list_head *head = &desc->pg_list; + struct pnfs_layout_segment *lseg = desc->pg_lseg; int ret = -ENOMEM; - data = nfs_readdata_alloc(npages); + data = nfs_readdata_alloc(nfs_page_array_len(desc->pg_base, + desc->pg_count)); if (!data) { nfs_async_read_error(head); goto out; @@ -344,9 +351,10 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned } req = nfs_list_entry(data->pages.next); if ((!lseg) && list_is_singular(&data->pages)) - lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ); + lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ); - ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0, lseg); + ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, desc->pg_count, + 0, lseg); out: put_lseg(lseg); return ret; diff --git a/fs/nfs/write.c b/fs/nfs/write.c index ee62ddf60e7a..b74200a2f753 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -898,20 +898,21 @@ static void nfs_redirty_request(struct nfs_page *req) * Generate multiple small requests to write out a single * contiguous dirty area on one page. */ -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) +static int nfs_flush_multi(struct nfs_pageio_descriptor *desc) { - struct nfs_page *req = nfs_list_entry(head->next); + struct nfs_page *req = nfs_list_entry(desc->pg_list.next); struct page *page = req->wb_page; struct nfs_write_data *data; - size_t wsize = NFS_SERVER(inode)->wsize, nbytes; + size_t wsize = NFS_SERVER(desc->pg_inode)->wsize, nbytes; unsigned int offset; int requests = 0; int ret = 0; + struct pnfs_layout_segment *lseg; LIST_HEAD(list); nfs_list_remove_request(req); - nbytes = count; + nbytes = desc->pg_count; do { size_t len = min(nbytes, wsize); @@ -924,11 +925,11 @@ static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned } while (nbytes != 0); atomic_set(&req->wb_complete, requests); - BUG_ON(lseg); - lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_RW); + BUG_ON(desc->pg_lseg); + lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_RW); ClearPageError(page); offset = 0; - nbytes = count; + nbytes = desc->pg_count; do { int ret2; @@ -940,7 +941,7 @@ static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned if (nbytes < wsize) wsize = nbytes; ret2 = nfs_write_rpcsetup(req, data, &nfs_write_partial_ops, - wsize, offset, lseg, how); + wsize, offset, lseg, desc->pg_ioflags); if (ret == 0) ret = ret2; offset += wsize; @@ -968,14 +969,17 @@ static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned * This is the case if nfs_updatepage detects a conflicting request * that has been written but not committed. */ -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) +static int nfs_flush_one(struct nfs_pageio_descriptor *desc) { struct nfs_page *req; struct page **pages; struct nfs_write_data *data; + struct list_head *head = &desc->pg_list; + struct pnfs_layout_segment *lseg = desc->pg_lseg; int ret; - data = nfs_writedata_alloc(npages); + data = nfs_writedata_alloc(nfs_page_array_len(desc->pg_base, + desc->pg_count)); if (!data) { while (!list_empty(head)) { req = nfs_list_entry(head->next); @@ -995,10 +999,10 @@ static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned i } req = nfs_list_entry(data->pages.next); if ((!lseg) && list_is_singular(&data->pages)) - lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_RW); + lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_RW); /* Set up the argument struct */ - ret = nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, lseg, how); + ret = nfs_write_rpcsetup(req, data, &nfs_write_full_ops, desc->pg_count, 0, lseg, desc->pg_ioflags); out: put_lseg(lseg); /* Cleans any gotten in ->pg_test */ return ret; diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h index ba88ff4f8186..90907ada6d52 100644 --- a/include/linux/nfs_page.h +++ b/include/linux/nfs_page.h @@ -59,7 +59,7 @@ struct nfs_pageio_descriptor { unsigned int pg_base; struct inode *pg_inode; - int (*pg_doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *); + int (*pg_doio)(struct nfs_pageio_descriptor *); int pg_ioflags; int pg_error; struct pnfs_layout_segment *pg_lseg; @@ -81,7 +81,7 @@ extern int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *dst, pgoff_t idx_start, unsigned int npages, int tag); extern void nfs_pageio_init(struct nfs_pageio_descriptor *desc, struct inode *inode, - int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *), + int (*doio)(struct nfs_pageio_descriptor *desc), size_t bsize, int how); extern int nfs_pageio_add_request(struct nfs_pageio_descriptor *, -- GitLab