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| author | David Howells <dhowells@redhat.com> | 2009-04-03 16:42:45 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2009-04-03 16:42:45 +0100 |
| commit | 7f8e05f60c87646e12c761fef61dd71a7e67112e (patch) | |
| tree | f33bfcd5b4662a48890e8245362b381437be76fb | |
| parent | 9a9fc1c03315f1606596e55b4096d39e2079a041 (diff) | |
| download | blackbird-op-linux-7f8e05f60c87646e12c761fef61dd71a7e67112e.tar.gz blackbird-op-linux-7f8e05f60c87646e12c761fef61dd71a7e67112e.zip | |
NFS: Store pages from an NFS inode into a local cache
Store pages from an NFS inode into the cache data storage object associated
with that inode.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@framestore.com>
| -rw-r--r-- | fs/nfs/fscache.c | 28 | ||||
| -rw-r--r-- | fs/nfs/fscache.h | 16 | ||||
| -rw-r--r-- | 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 3a3056657858..379be678cb7e 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -493,3 +493,31 @@ 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 099349c171ca..1ec3ebb0efcd 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); /* * wait for a page to complete writing to the cache @@ -140,6 +141,19 @@ 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) {} @@ -184,6 +198,8 @@ 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 e18ba792872f..4ace3c50a8eb 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", |
