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| author |   David Howells <dhowells@redhat.com> | 2009-04-03 16:42:44 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2009-04-03 16:42:44 +0100 |
| commit | 9a9fc1c03315f1606596e55b4096d39e2079a041 (patch) | |
| tree | 0eb9a2d9844a821e515baeb59e6d5e38384d5915 /fs/nfs/fscache.h | |
| parent | NFS: nfs_readpage_async() needs to be accessible as a fallback for local caching (diff) | |
| download | linux-dev-9a9fc1c03315f1606596e55b4096d39e2079a041.tar.xz linux-dev-9a9fc1c03315f1606596e55b4096d39e2079a041.zip | |
NFS: Read pages from FS-Cache into an NFS inode
Read pages from an FS-Cache data storage object representing an inode into an
NFS 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>
Diffstat (limited to 'fs/nfs/fscache.h')
| -rw-r--r-- | fs/nfs/fscache.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index e29613a8cbd2..099349c171ca 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -86,6 +86,12 @@ extern void nfs_fscache_reset_inode_cookie(struct inode *); extern void __nfs_fscache_invalidate_page(struct page *, struct inode *); extern int nfs_fscache_release_page(struct page *, gfp_t); +extern int __nfs_readpage_from_fscache(struct nfs_open_context *, + struct inode *, struct page *); +extern int __nfs_readpages_from_fscache(struct nfs_open_context *, + struct inode *, struct address_space *, + struct list_head *, unsigned *); + /* * wait for a page to complete writing to the cache */ @@ -107,6 +113,32 @@ static inline void nfs_fscache_invalidate_page(struct page *page, __nfs_fscache_invalidate_page(page, inode); } +/* + * Retrieve a page from an inode data storage object. + */ +static inline int nfs_readpage_from_fscache(struct nfs_open_context *ctx, + struct inode *inode, + struct page *page) +{ + if (NFS_I(inode)->fscache) + return __nfs_readpage_from_fscache(ctx, inode, page); + return -ENOBUFS; +} + +/* + * Retrieve a set of pages from an inode data storage object. + */ +static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx, + struct inode *inode, + struct address_space *mapping, + struct list_head *pages, + unsigned *nr_pages) +{ + if (NFS_I(inode)->fscache) + return __nfs_readpages_from_fscache(ctx, inode, mapping, pages, + nr_pages); + return -ENOBUFS; +} #else /* CONFIG_NFS_FSCACHE */ static inline int nfs_fscache_register(void) { return 0; } @@ -138,5 +170,20 @@ static inline void nfs_fscache_invalidate_page(struct page *page, static inline void nfs_fscache_wait_on_page_write(struct nfs_inode *nfsi, struct page *page) {} +static inline int nfs_readpage_from_fscache(struct nfs_open_context *ctx, + struct inode *inode, + struct page *page) +{ + return -ENOBUFS; +} +static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx, + struct inode *inode, + struct address_space *mapping, + struct list_head *pages, + unsigned *nr_pages) +{ + return -ENOBUFS; +} + #endif /* CONFIG_NFS_FSCACHE */ #endif /* _NFS_FSCACHE_H */ |