mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
83 lines
2.2 KiB
Diff
83 lines
2.2 KiB
Diff
|
--- a/fs/fuse/dev.c
|
||
|
|
+++ b/fs/fuse/dev.c
|
||
|
|
@@ -533,6 +533,11 @@ static void fuse_copy_finish(struct fuse
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
+#ifdef DCACHE_BUG
|
||
|
|
+extern void (*fuse_flush_cache_all)(void);
|
||
|
|
+extern void (*fuse_flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
/*
|
||
|
|
* Get another pagefull of userspace buffer, and map it to kernel
|
||
|
|
* address space, and lock request
|
||
|
|
@@ -541,6 +546,9 @@ static int fuse_copy_fill(struct fuse_co
|
||
|
|
{
|
||
|
|
unsigned long offset;
|
||
|
|
int err;
|
||
|
|
+#ifdef DCACHE_BUG
|
||
|
|
+ struct vm_area_struct *vma;
|
||
|
|
+#endif
|
||
|
|
|
||
|
|
unlock_request(cs->fc, cs->req);
|
||
|
|
fuse_copy_finish(cs);
|
||
|
|
@@ -552,14 +560,22 @@ static int fuse_copy_fill(struct fuse_co
|
||
|
|
cs->nr_segs--;
|
||
|
|
}
|
||
|
|
down_read(¤t->mm->mmap_sem);
|
||
|
|
+#ifndef DCACHE_BUG
|
||
|
|
err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
|
||
|
|
&cs->pg, NULL);
|
||
|
|
+#else
|
||
|
|
+ err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
|
||
|
|
+ &cs->pg, &vma);
|
||
|
|
+#endif
|
||
|
|
up_read(¤t->mm->mmap_sem);
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
BUG_ON(err != 1);
|
||
|
|
offset = cs->addr % PAGE_SIZE;
|
||
|
|
cs->mapaddr = kmap_atomic(cs->pg, KM_USER0);
|
||
|
|
+#ifdef DCACHE_BUG
|
||
|
|
+ fuse_flush_cache_page(vma, cs->addr, page_to_pfn(cs->pg));
|
||
|
|
+#endif
|
||
|
|
cs->buf = cs->mapaddr + offset;
|
||
|
|
cs->len = min(PAGE_SIZE - offset, cs->seglen);
|
||
|
|
cs->seglen -= cs->len;
|
||
|
|
@@ -573,6 +589,11 @@ static int fuse_copy_do(struct fuse_copy
|
||
|
|
{
|
||
|
|
unsigned ncpy = min(*size, cs->len);
|
||
|
|
if (val) {
|
||
|
|
+#ifdef DCACHE_BUG
|
||
|
|
+ // patch from mailing list, it is very important, otherwise,
|
||
|
|
+ // can't mount, or ls mount point will hang
|
||
|
|
+ fuse_flush_cache_all();
|
||
|
|
+#endif
|
||
|
|
if (cs->write)
|
||
|
|
memcpy(cs->buf, *val, ncpy);
|
||
|
|
else
|
||
|
|
--- a/fs/fuse/fuse_i.h
|
||
|
|
+++ b/fs/fuse/fuse_i.h
|
||
|
|
@@ -8,6 +8,7 @@
|
||
|
|
|
||
|
|
#ifndef _FS_FUSE_I_H
|
||
|
|
#define _FS_FUSE_I_H
|
||
|
|
+#define DCACHE_BUG
|
||
|
|
|
||
|
|
#include <linux/fuse.h>
|
||
|
|
#include <linux/fs.h>
|
||
|
|
--- a/fs/fuse/inode.c
|
||
|
|
+++ b/fs/fuse/inode.c
|
||
|
|
@@ -1201,6 +1201,10 @@ static int __init fuse_init(void)
|
||
|
|
printk(KERN_INFO "fuse init (API version %i.%i)\n",
|
||
|
|
FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
|
||
|
|
|
||
|
|
+#ifdef DCACHE_BUG
|
||
|
|
+printk("fuse init: DCACHE_BUG enabled\n");
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
INIT_LIST_HEAD(&fuse_conn_list);
|
||
|
|
res = fuse_fs_init();
|
||
|
|
if (res)
|