diff options
Diffstat (limited to 'fs/nfs/read.c')
| -rw-r--r-- | fs/nfs/read.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/fs/nfs/read.c b/fs/nfs/read.c index f856004bb7fa..4ace3c50a8eb 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -24,6 +24,7 @@ #include "internal.h" #include "iostat.h" +#include "fscache.h" #define NFSDBG_FACILITY NFSDBG_PAGECACHE @@ -111,8 +112,8 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data) } } -static int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode, - struct page *page) +int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode, + struct page *page) { LIST_HEAD(one_request); struct nfs_page *new; @@ -139,6 +140,11 @@ static int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode, static void nfs_readpage_release(struct nfs_page *req) { + struct inode *d_inode = req->wb_context->path.dentry->d_inode; + + if (PageUptodate(req->wb_page)) + nfs_readpage_to_fscache(d_inode, req->wb_page, 0); + unlock_page(req->wb_page); dprintk("NFS: read done (%s/%Ld %d@%Ld)\n", @@ -510,8 +516,15 @@ int nfs_readpage(struct file *file, struct page *page) } else ctx = get_nfs_open_context(nfs_file_open_context(file)); + if (!IS_SYNC(inode)) { + error = nfs_readpage_from_fscache(ctx, inode, page); + if (error == 0) + goto out; + } + error = nfs_readpage_async(ctx, inode, page); +out: put_nfs_open_context(ctx); return error; out_unlock: @@ -584,6 +597,15 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, return -EBADF; } else desc.ctx = get_nfs_open_context(nfs_file_open_context(filp)); + + /* attempt to read as many of the pages as possible from the cache + * - this returns -ENOBUFS immediately if the cookie is negative + */ + ret = nfs_readpages_from_fscache(desc.ctx, inode, mapping, + pages, &nr_pages); + if (ret == 0) + goto read_complete; /* all pages were read */ + if (rsize < PAGE_CACHE_SIZE) nfs_pageio_init(&pgio, inode, nfs_pagein_multi, rsize, 0); else @@ -594,6 +616,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, nfs_pageio_complete(&pgio); npages = (pgio.pg_bytes_written + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; nfs_add_stats(inode, NFSIOS_READPAGES, npages); +read_complete: put_nfs_open_context(desc.ctx); out: return ret; |