}
/*
- * synchronously write back the locked page and any subsequent non-locked dirty
- * pages also covered by the same writeback record
+ * Redirty all the pages in a given range.
+ */
+ static void afs_redirty_pages(struct writeback_control *wbc,
+ struct address_space *mapping,
+ pgoff_t first, pgoff_t last)
+ {
+ struct afs_vnode *vnode = AFS_FS_I(mapping->host);
+ struct pagevec pv;
+ unsigned count, loop;
+
+ _enter("{%x:%u},%lx-%lx",
+ vnode->fid.vid, vnode->fid.vnode, first, last);
+
- pagevec_init(&pv, 0);
++ pagevec_init(&pv);
+
+ do {
+ _debug("redirty %lx-%lx", first, last);
+
+ count = last - first + 1;
+ if (count > PAGEVEC_SIZE)
+ count = PAGEVEC_SIZE;
+ pv.nr = find_get_pages_contig(mapping, first, count, pv.pages);
+ ASSERTCMP(pv.nr, ==, count);
+
+ for (loop = 0; loop < count; loop++) {
+ struct page *page = pv.pages[loop];
+
+ redirty_page_for_writepage(wbc, page);
+ end_page_writeback(page);
+ if (page->index >= first)
+ first = page->index + 1;
+ }
+
+ __pagevec_release(&pv);
+ } while (first <= last);
+
+ _leave("");
+ }
+
+ /*
+ * write to a file
+ */
+ static int afs_store_data(struct address_space *mapping,
+ pgoff_t first, pgoff_t last,
+ unsigned offset, unsigned to)
+ {
+ struct afs_vnode *vnode = AFS_FS_I(mapping->host);
+ struct afs_fs_cursor fc;
+ struct afs_wb_key *wbk = NULL;
+ struct list_head *p;
+ int ret = -ENOKEY, ret2;
+
+ _enter("%s{%x:%u.%u},%lx,%lx,%x,%x",
+ vnode->volume->name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ first, last, offset, to);
+
+ spin_lock(&vnode->wb_lock);
+ p = vnode->wb_keys.next;
+
+ /* Iterate through the list looking for a valid key to use. */
+ try_next_key:
+ while (p != &vnode->wb_keys) {
+ wbk = list_entry(p, struct afs_wb_key, vnode_link);
+ _debug("wbk %u", key_serial(wbk->key));
+ ret2 = key_validate(wbk->key);
+ if (ret2 == 0)
+ goto found_key;
+ if (ret == -ENOKEY)
+ ret = ret2;
+ p = p->next;
+ }
+
+ spin_unlock(&vnode->wb_lock);
+ afs_put_wb_key(wbk);
+ _leave(" = %d [no keys]", ret);
+ return ret;
+
+ found_key:
+ refcount_inc(&wbk->usage);
+ spin_unlock(&vnode->wb_lock);
+
+ _debug("USE WB KEY %u", key_serial(wbk->key));
+
+ ret = -ERESTARTSYS;
+ if (afs_begin_vnode_operation(&fc, vnode, wbk->key)) {
+ while (afs_select_fileserver(&fc)) {
+ fc.cb_break = vnode->cb_break + vnode->cb_s_break;
+ afs_fs_store_data(&fc, mapping, first, last, offset, to);
+ }
+
+ afs_check_for_remote_deletion(&fc, fc.vnode);
+ afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+ ret = afs_end_vnode_operation(&fc);
+ }
+
+ switch (ret) {
+ case -EACCES:
+ case -EPERM:
+ case -ENOKEY:
+ case -EKEYEXPIRED:
+ case -EKEYREJECTED:
+ case -EKEYREVOKED:
+ _debug("next");
+ spin_lock(&vnode->wb_lock);
+ p = wbk->vnode_link.next;
+ afs_put_wb_key(wbk);
+ goto try_next_key;
+ }
+
+ afs_put_wb_key(wbk);
+ _leave(" = %d", ret);
+ return ret;
+ }
+
+ /*
+ * Synchronously write back the locked page and any subsequent non-locked dirty
+ * pages.
*/
- static int afs_write_back_from_locked_page(struct afs_writeback *wb,
- struct page *primary_page)
+ static int afs_write_back_from_locked_page(struct address_space *mapping,
+ struct writeback_control *wbc,
+ struct page *primary_page,
+ pgoff_t final_page)
{
+ struct afs_vnode *vnode = AFS_FS_I(mapping->host);
struct page *pages[8], *page;
- unsigned long count;
- unsigned n, offset, to;
+ unsigned long count, priv;
+ unsigned n, offset, to, f, t;
pgoff_t start, first, last;
int loop, ret;
_enter("{%x:%u},{%lx-%lx}",
vnode->fid.vid, vnode->fid.vnode, first, last);
- ASSERT(wb != NULL);
-
- pagevec_init(&pv, 0);
+ pagevec_init(&pv);
do {
_debug("done %lx-%lx", first, last);
projects / mirror_ubuntu-kernels.git / commitdiff