Store pages from an NFS inode into the cache data storage object associated with that inode. Signed-off-by: David Howells <dhowells@xxxxxxxxxx> --- fs/nfs/fscache.c | 28 ++++++++++++++++++++++++++++ fs/nfs/fscache.h | 16 ++++++++++++++++ fs/nfs/read.c | 5 +++++ 3 files changed, 49 insertions(+), 0 deletions(-) diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index fcabfdc..968cf5d 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -491,3 +491,31 @@ int __nfs_readpages_from_fscache(struct nfs_open_context *ctx, return ret; } + +/* + * Store a newly fetched page in fscache + * - PG_fscache must be set on the page + */ +void __nfs_readpage_to_fscache(struct inode *inode, struct page *page, int sync) +{ + int ret; + + dfprintk(FSCACHE, + "NFS: readpage_to_fscache(fsc:%p/p:%p(i:%lx f:%lx)/%d)\n", + NFS_I(inode)->fscache, page, page->index, page->flags, sync); + + ret = fscache_write_page(NFS_I(inode)->fscache, page, GFP_KERNEL); + dfprintk(FSCACHE, + "NFS: readpage_to_fscache: p:%p(i:%lu f:%lx) ret %d\n", + page, page->index, page->flags, ret); + + if (ret != 0) { + fscache_uncache_page(NFS_I(inode)->fscache, page); + nfs_add_fscache_stats(inode, + NFSIOS_FSCACHE_PAGES_WRITTEN_FAIL, 1); + nfs_add_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_UNCACHED, 1); + } else { + nfs_add_fscache_stats(inode, + NFSIOS_FSCACHE_PAGES_WRITTEN_OK, 1); + } +} diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index cbc010e..7eeaab4 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -91,6 +91,7 @@ extern int __nfs_readpage_from_fscache(struct nfs_open_context *, extern int __nfs_readpages_from_fscache(struct nfs_open_context *, struct inode *, struct address_space *, struct list_head *, unsigned *); +extern void __nfs_readpage_to_fscache(struct inode *, struct page *, int); /* * release the caching state associated with a page if undergoing complete page @@ -130,6 +131,19 @@ static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx, return -ENOBUFS; } +/* + * Store a page newly fetched from the server in an inode data storage object + * in the cache. + */ +static inline void nfs_readpage_to_fscache(struct inode *inode, + struct page *page, + int sync) +{ + if (PageFsCache(page)) + __nfs_readpage_to_fscache(inode, page, sync); +} + + #else /* CONFIG_NFS_FSCACHE */ static inline int nfs_fscache_register(void) { return 0; } static inline void nfs_fscache_unregister(void) {} @@ -172,6 +186,8 @@ static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx, { return -ENOBUFS; } +static inline void nfs_readpage_to_fscache(struct inode *inode, + struct page *page, int sync) {} #endif /* CONFIG_NFS_FSCACHE */ #endif /* _NFS_FSCACHE_H */ diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 2e9e523..d74dc08 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -140,6 +140,11 @@ 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", -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html