/* * clear an AFS inode */ void afs_evict_inode(struct inode *inode) { struct afs_vnode *vnode; vnode = AFS_FS_I(inode); _enter("{%x:%u.%d}", vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique); _debug("CLEAR INODE %p", inode); ASSERTCMP(inode->i_ino, ==, vnode->fid.vnode); truncate_inode_pages_final(&inode->i_data); clear_inode(inode); if (vnode->cb_interest) { afs_put_cb_interest(afs_i2net(inode), vnode->cb_interest); vnode->cb_interest = NULL; } while (!list_empty(&vnode->wb_keys)) { struct afs_wb_key *wbk = list_entry(vnode->wb_keys.next, struct afs_wb_key, vnode_link); list_del(&wbk->vnode_link); afs_put_wb_key(wbk); } #ifdef CONFIG_AFS_FSCACHE fscache_relinquish_cookie(vnode->cache, 0); vnode->cache = NULL; #endif afs_put_permits(vnode->permit_cache); _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 = afs_calc_vnode_cb_break(vnode); 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 0: afs_stat_v(vnode, n_stores); atomic_long_add((last * PAGE_SIZE + to) - (first * PAGE_SIZE + offset), &afs_v2net(vnode)->n_store_bytes); break; 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; }