From 9999e48639b3cecb08ffb37358bcba3b48161b29 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:17 +0000
Subject: [PATCH] add ax88772_rst
---
kernel/fs/afs/file.c | 166 +++++++++++++++++++++++++++++++++++++------------------
1 files changed, 111 insertions(+), 55 deletions(-)
diff --git a/kernel/fs/afs/file.c b/kernel/fs/afs/file.c
index 0bd78df..960b642 100644
--- a/kernel/fs/afs/file.c
+++ b/kernel/fs/afs/file.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* AFS filesystem file handling
*
* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
@@ -17,6 +13,7 @@
#include <linux/writeback.h>
#include <linux/gfp.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/mm.h>
#include "internal.h"
static int afs_file_mmap(struct file *file, struct vm_area_struct *vma);
@@ -36,6 +33,7 @@
.write_iter = afs_file_write,
.mmap = afs_file_mmap,
.splice_read = generic_file_splice_read,
+ .splice_write = iter_file_splice_write,
.fsync = afs_fsync,
.lock = afs_lock,
.flock = afs_flock,
@@ -45,7 +43,6 @@
.getattr = afs_getattr,
.setattr = afs_setattr,
.permission = afs_permission,
- .listxattr = afs_listxattr,
};
const struct address_space_operations afs_fs_aops = {
@@ -72,7 +69,7 @@
*/
void afs_put_wb_key(struct afs_wb_key *wbk)
{
- if (refcount_dec_and_test(&wbk->usage)) {
+ if (wbk && refcount_dec_and_test(&wbk->usage)) {
key_put(wbk->key);
kfree(wbk);
}
@@ -121,7 +118,7 @@
struct key *key;
int ret;
- _enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
+ _enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode);
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key)) {
@@ -171,7 +168,7 @@
struct afs_file *af = file->private_data;
int ret = 0;
- _enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
+ _enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode);
if ((file->f_mode & FMODE_WRITE))
ret = vfs_fsync(file, 0);
@@ -223,41 +220,52 @@
}
#endif
+static void afs_fetch_data_success(struct afs_operation *op)
+{
+ struct afs_vnode *vnode = op->file[0].vnode;
+
+ _enter("op=%08x", op->debug_id);
+ afs_vnode_commit_status(op, &op->file[0]);
+ afs_stat_v(vnode, n_fetches);
+ atomic_long_add(op->fetch.req->actual_len, &op->net->n_fetch_bytes);
+}
+
+static void afs_fetch_data_put(struct afs_operation *op)
+{
+ afs_put_read(op->fetch.req);
+}
+
+static const struct afs_operation_ops afs_fetch_data_operation = {
+ .issue_afs_rpc = afs_fs_fetch_data,
+ .issue_yfs_rpc = yfs_fs_fetch_data,
+ .success = afs_fetch_data_success,
+ .aborted = afs_check_for_remote_deletion,
+ .put = afs_fetch_data_put,
+};
+
/*
* Fetch file data from the volume.
*/
-int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *desc)
+int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *req)
{
- struct afs_fs_cursor fc;
- int ret;
+ struct afs_operation *op;
- _enter("%s{%x:%u.%u},%x,,,",
+ _enter("%s{%llx:%llu.%u},%x,,,",
vnode->volume->name,
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique,
key_serial(key));
- ret = -ERESTARTSYS;
- if (afs_begin_vnode_operation(&fc, vnode, key)) {
- while (afs_select_fileserver(&fc)) {
- fc.cb_break = afs_calc_vnode_cb_break(vnode);
- afs_fs_fetch_data(&fc, desc);
- }
+ op = afs_alloc_operation(key, vnode->volume);
+ if (IS_ERR(op))
+ return PTR_ERR(op);
- afs_check_for_remote_deletion(&fc, fc.vnode);
- afs_vnode_commit_status(&fc, vnode, fc.cb_break);
- ret = afs_end_vnode_operation(&fc);
- }
+ afs_op_set_vnode(op, 0, vnode);
- if (ret == 0) {
- afs_stat_v(vnode, n_fetches);
- atomic_long_add(desc->actual_len,
- &afs_v2net(vnode)->n_fetch_bytes);
- }
-
- _leave(" = %d", ret);
- return ret;
+ op->fetch.req = afs_get_read(req);
+ op->ops = &afs_fetch_data_operation;
+ return afs_do_sync_operation(op);
}
/*
@@ -302,10 +310,11 @@
/* page will not be cached */
case -ENOBUFS:
_debug("cache said ENOBUFS");
+
+ fallthrough;
default:
go_on:
- req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *),
- GFP_KERNEL);
+ req = kzalloc(struct_size(req, array, 1), GFP_KERNEL);
if (!req)
goto enomem;
@@ -404,10 +413,10 @@
/*
* Make pages available as they're filled.
*/
-static void afs_readpages_page_done(struct afs_call *call, struct afs_read *req)
+static void afs_readpages_page_done(struct afs_read *req)
{
#ifdef CONFIG_AFS_FSCACHE
- struct afs_vnode *vnode = call->reply[0];
+ struct afs_vnode *vnode = req->vnode;
#endif
struct page *page = req->pages[req->index];
@@ -444,7 +453,7 @@
/* Count the number of contiguous pages at the front of the list. Note
* that the list goes prev-wards rather than next-wards.
*/
- first = list_entry(pages->prev, struct page, lru);
+ first = lru_to_page(pages);
index = first->index + 1;
n = 1;
for (p = first->lru.prev; p != pages; p = p->prev) {
@@ -455,12 +464,12 @@
n++;
}
- req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *) * n,
- GFP_NOFS);
+ req = kzalloc(struct_size(req, array, n), GFP_NOFS);
if (!req)
return -ENOMEM;
refcount_set(&req->usage, 1);
+ req->vnode = vnode;
req->page_done = afs_readpages_page_done;
req->pos = first->index;
req->pos <<= PAGE_SHIFT;
@@ -476,7 +485,7 @@
* page at the end of the file.
*/
do {
- page = list_entry(pages->prev, struct page, lru);
+ page = lru_to_page(pages);
list_del(&page->lru);
index = page->index;
if (add_to_page_cache_lru(page, mapping, index,
@@ -592,6 +601,63 @@
}
/*
+ * Adjust the dirty region of the page on truncation or full invalidation,
+ * getting rid of the markers altogether if the region is entirely invalidated.
+ */
+static void afs_invalidate_dirty(struct page *page, unsigned int offset,
+ unsigned int length)
+{
+ struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
+ unsigned long priv;
+ unsigned int f, t, end = offset + length;
+
+ priv = page_private(page);
+
+ /* we clean up only if the entire page is being invalidated */
+ if (offset == 0 && length == thp_size(page))
+ goto full_invalidate;
+
+ /* If the page was dirtied by page_mkwrite(), the PTE stays writable
+ * and we don't get another notification to tell us to expand it
+ * again.
+ */
+ if (afs_is_page_dirty_mmapped(priv))
+ return;
+
+ /* We may need to shorten the dirty region */
+ f = afs_page_dirty_from(priv);
+ t = afs_page_dirty_to(priv);
+
+ if (t <= offset || f >= end)
+ return; /* Doesn't overlap */
+
+ if (f < offset && t > end)
+ return; /* Splits the dirty region - just absorb it */
+
+ if (f >= offset && t <= end)
+ goto undirty;
+
+ if (f < offset)
+ t = offset;
+ else
+ f = end;
+ if (f == t)
+ goto undirty;
+
+ priv = afs_page_dirty(f, t);
+ set_page_private(page, priv);
+ trace_afs_page_dirty(vnode, tracepoint_string("trunc"), page->index, priv);
+ return;
+
+undirty:
+ trace_afs_page_dirty(vnode, tracepoint_string("undirty"), page->index, priv);
+ clear_page_dirty_for_io(page);
+full_invalidate:
+ priv = (unsigned long)detach_page_private(page);
+ trace_afs_page_dirty(vnode, tracepoint_string("inval"), page->index, priv);
+}
+
+/*
* invalidate part or all of a page
* - release a page and clean up its private data if offset is 0 (indicating
* the entire page)
@@ -599,31 +665,23 @@
static void afs_invalidatepage(struct page *page, unsigned int offset,
unsigned int length)
{
- struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
- unsigned long priv;
-
_enter("{%lu},%u,%u", page->index, offset, length);
BUG_ON(!PageLocked(page));
+#ifdef CONFIG_AFS_FSCACHE
/* we clean up only if the entire page is being invalidated */
if (offset == 0 && length == PAGE_SIZE) {
-#ifdef CONFIG_AFS_FSCACHE
if (PageFsCache(page)) {
struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
fscache_wait_on_page_write(vnode->cache, page);
fscache_uncache_page(vnode->cache, page);
}
+ }
#endif
- if (PagePrivate(page)) {
- priv = page_private(page);
- trace_afs_page_dirty(vnode, tracepoint_string("inval"),
- page->index, priv);
- set_page_private(page, 0);
- ClearPagePrivate(page);
- }
- }
+ if (PagePrivate(page))
+ afs_invalidate_dirty(page, offset, length);
_leave("");
}
@@ -637,7 +695,7 @@
struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
unsigned long priv;
- _enter("{{%x:%u}[%lu],%lx},%x",
+ _enter("{{%llx:%llu}[%lu],%lx},%x",
vnode->fid.vid, vnode->fid.vnode, page->index, page->flags,
gfp_flags);
@@ -651,11 +709,9 @@
#endif
if (PagePrivate(page)) {
- priv = page_private(page);
+ priv = (unsigned long)detach_page_private(page);
trace_afs_page_dirty(vnode, tracepoint_string("rel"),
page->index, priv);
- set_page_private(page, 0);
- ClearPagePrivate(page);
}
/* indicate that the page can be released */
--
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