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author | David Howells <dhowells@redhat.com> | 2009-04-03 16:42:44 +0100 |
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committer | David Howells <dhowells@redhat.com> | 2009-04-03 16:42:44 +0100 |
commit | 545db45f0fc0d4203b045047798ce156972a3056 (patch) | |
tree | 783db1091f5d6f21dafece81f6c94caf0aec98b8 /fs/nfs/file.c | |
parent | 6a51091d0775cdc4a923f2172c61925ad416aa32 (diff) | |
download | kernel-crypto-545db45f0fc0d4203b045047798ce156972a3056.tar.gz kernel-crypto-545db45f0fc0d4203b045047798ce156972a3056.tar.xz kernel-crypto-545db45f0fc0d4203b045047798ce156972a3056.zip |
NFS: FS-Cache page management
FS-Cache page management for NFS. This includes hooking the releasing and
invalidation of pages marked with PG_fscache (aka PG_private_2) and waiting for
completion of the write-to-cache flag (PG_fscache_write aka PG_owner_priv_2).
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/file.c')
-rw-r--r-- | fs/nfs/file.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index f5bc54dccec..3523b895eb4 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -35,6 +35,7 @@ #include "delegation.h" #include "internal.h" #include "iostat.h" +#include "fscache.h" #define NFSDBG_FACILITY NFSDBG_FILE @@ -413,7 +414,7 @@ static int nfs_write_end(struct file *file, struct address_space *mapping, * Partially or wholly invalidate a page * - Release the private state associated with a page if undergoing complete * page invalidation - * - Called if either PG_private or PG_private_2 is set on the page + * - Called if either PG_private or PG_fscache is set on the page * - Caller holds page lock */ static void nfs_invalidate_page(struct page *page, unsigned long offset) @@ -424,11 +425,13 @@ static void nfs_invalidate_page(struct page *page, unsigned long offset) return; /* Cancel any unstarted writes on this page */ nfs_wb_page_cancel(page->mapping->host, page); + + nfs_fscache_invalidate_page(page, page->mapping->host); } /* * Attempt to release the private state associated with a page - * - Called if either PG_private or PG_private_2 is set on the page + * - Called if either PG_private or PG_fscache is set on the page * - Caller holds page lock * - Return true (may release page) or false (may not) */ @@ -437,24 +440,28 @@ static int nfs_release_page(struct page *page, gfp_t gfp) dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page); /* If PagePrivate() is set, then the page is not freeable */ - return 0; + if (PagePrivate(page)) + return 0; + return nfs_fscache_release_page(page, gfp); } /* * Attempt to clear the private state associated with a page when an error * occurs that requires the cached contents of an inode to be written back or * destroyed - * - Called if either PG_private or PG_private_2 is set on the page + * - Called if either PG_private or fscache is set on the page * - Caller holds page lock * - Return 0 if successful, -error otherwise */ static int nfs_launder_page(struct page *page) { struct inode *inode = page->mapping->host; + struct nfs_inode *nfsi = NFS_I(inode); dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n", inode->i_ino, (long long)page_offset(page)); + nfs_fscache_wait_on_page_write(nfsi, page); return nfs_wb_page(inode, page); } @@ -491,6 +498,9 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) filp->f_mapping->host->i_ino, (long long)page_offset(page)); + /* make sure the cache has finished storing the page */ + nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page); + lock_page(page); mapping = page->mapping; if (mapping != dentry->d_inode->i_mapping) |