AFS: implement basic file write support

[linux-2.6-omap-h63xx.git] / fs / afs / file.c

diff --git a/fs/afs/file.c b/fs/afs/file.c
index 3eb3fc7b36be6e674cf1a26d0d06a243841be0f7..3e25795e5a4243ca26315d847c0e6a42fa93e087 100644 (file)
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -15,32 +15,43 @@
 #include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
+#include <linux/writeback.h>
 #include "internal.h"
 
 static int afs_readpage(struct file *file, struct page *page);
 static void afs_invalidatepage(struct page *page, unsigned long offset);
 static int afs_releasepage(struct page *page, gfp_t gfp_flags);
+static int afs_launder_page(struct page *page);
 
 const struct file_operations afs_file_operations = {
        .open           = afs_open,
        .release        = afs_release,
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
+       .write          = do_sync_write,
        .aio_read       = generic_file_aio_read,
+       .aio_write      = afs_file_write,
        .mmap           = generic_file_readonly_mmap,
        .sendfile       = generic_file_sendfile,
+       .fsync          = afs_fsync,
 };
 
 const struct inode_operations afs_file_inode_operations = {
        .getattr        = afs_getattr,
+       .setattr        = afs_setattr,
        .permission     = afs_permission,
 };
 
 const struct address_space_operations afs_fs_aops = {
        .readpage       = afs_readpage,
-       .set_page_dirty = __set_page_dirty_nobuffers,
+       .set_page_dirty = afs_set_page_dirty,
+       .launder_page   = afs_launder_page,
        .releasepage    = afs_releasepage,
        .invalidatepage = afs_invalidatepage,
+       .prepare_write  = afs_prepare_write,
+       .commit_write   = afs_commit_write,
+       .writepage      = afs_writepage,
+       .writepages     = afs_writepages,
 };
 
 /*
@@ -230,11 +241,6 @@ static void afs_invalidatepage(struct page *page, unsigned long offset)
        BUG_ON(!PageLocked(page));
 
        if (PagePrivate(page)) {
-#ifdef AFS_CACHING_SUPPORT
-               struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
-               cachefs_uncache_page(vnode->cache,page);
-#endif
-
                /* We release buffers only if the entire page is being
                 * invalidated.
                 * The get_block cached value has been unconditionally
@@ -254,20 +260,34 @@ static void afs_invalidatepage(struct page *page, unsigned long offset)
        _leave(" = %d", ret);
 }
 
+/*
+ * write back a dirty page
+ */
+static int afs_launder_page(struct page *page)
+{
+       _enter("{%lu}", page->index);
+
+       return 0;
+}
+
 /*
  * release a page and cleanup its private data
  */
 static int afs_releasepage(struct page *page, gfp_t gfp_flags)
 {
        struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
+       struct afs_writeback *wb;
 
        _enter("{{%x:%u}[%lu],%lx},%x",
               vnode->fid.vid, vnode->fid.vnode, page->index, page->flags,
               gfp_flags);
 
        if (PagePrivate(page)) {
+               wb = (struct afs_writeback *) page_private(page);
+               ASSERT(wb != NULL);
                set_page_private(page, 0);
                ClearPagePrivate(page);
+               afs_put_writeback(wb);
        }
 
        _leave(" = 0");