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[brcm47xx] add patches to workaround dcache realted fuse problems (#5186)

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16412 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
jow 2009-06-11 02:10:41 +00:00
parent 0a49020502
commit e92b5b28a0
2 changed files with 116 additions and 0 deletions
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31
target/linux/brcm47xx/patches-2.6.28/301-kmod-fuse-dcache-bug-r4k.patch Normal file
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@ -0,0 +1,31 @@
--- linux-2.6.28.10.orig/arch/mips/mm/c-r4k.c 2009-05-02 20:54:43.000000000 +0200
+++ linux-2.6.28.10/arch/mips/mm/c-r4k.c 2009-06-07 20:36:01.667918000 +0200
@@ -348,7 +348,7 @@
}
}
-static void r4k___flush_cache_all(void)
+void r4k___flush_cache_all(void)
{
r4k_on_each_cpu(local_r4k___flush_cache_all, NULL, 1);
}
@@ -512,7 +512,7 @@
}
}
-static void r4k_flush_cache_page(struct vm_area_struct *vma,
+void r4k_flush_cache_page(struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn)
{
struct flush_cache_page_args args;
@@ -1401,3 +1401,10 @@
#endif
coherency_setup();
}
+
+// fuse package DCACHE BUG patch exports
+void (*fuse_flush_cache_all)(void) = r4k___flush_cache_all;
+void (*fuse_flush_cache_page)(struct vm_area_struct *vma, unsigned long page,
+ unsigned long pfn) = r4k_flush_cache_page;
+EXPORT_SYMBOL(fuse_flush_cache_page);
+EXPORT_SYMBOL(fuse_flush_cache_all);

85
target/linux/brcm47xx/patches-2.6.28/302-kmod-fuse-dcache-bug-fuse.patch Normal file
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@ -0,0 +1,85 @@
diff -ru linux-2.6.28.10.orig/fs/fuse/dev.c linux-2.6.28.10/fs/fuse/dev.c
--- linux-2.6.28.10.orig/fs/fuse/dev.c 2009-05-02 20:54:43.000000000 +0200
+++ linux-2.6.28.10/fs/fuse/dev.c 2009-06-07 20:29:50.229816000 +0200
@@ -525,6 +525,11 @@
}
}
+#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
@@ -533,6 +538,9 @@
{
unsigned long offset;
int err;
+#ifdef DCACHE_BUG
+ struct vm_area_struct *vma;
+#endif
unlock_request(cs->fc, cs->req);
fuse_copy_finish(cs);
@@ -544,14 +552,22 @@
cs->nr_segs --;
}
down_read(&current->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(&current->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;
@@ -565,6 +581,11 @@
{
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
diff -ru linux-2.6.28.10.orig/fs/fuse/fuse_i.h linux-2.6.28.10/fs/fuse/fuse_i.h
--- linux-2.6.28.10.orig/fs/fuse/fuse_i.h 2009-05-02 20:54:43.000000000 +0200
+++ linux-2.6.28.10/fs/fuse/fuse_i.h 2009-06-06 16:34:54.814468000 +0200
@@ -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>
diff -ru linux-2.6.28.10.orig/fs/fuse/inode.c linux-2.6.28.10/fs/fuse/inode.c
--- linux-2.6.28.10.orig/fs/fuse/inode.c 2009-05-02 20:54:43.000000000 +0200
+++ linux-2.6.28.10/fs/fuse/inode.c 2009-06-07 20:33:34.156611000 +0200
@@ -1038,6 +1038,10 @@
printk("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)