brcm47xx: add workaround for fuse again.

[openwrt/svn-archive/archive.git] / target / linux / brcm47xx / patches-2.6.36 / 302-kmod-fuse-dcache-bug-fuse.patch

diff --git a/target/linux/brcm47xx/patches-2.6.36/302-kmod-fuse-dcache-bug-fuse.patch b/target/linux/brcm47xx/patches-2.6.36/302-kmod-fuse-dcache-bug-fuse.patch
new file mode 100644 (file)
index 0000000..a546b1b
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.36/302-kmod-fuse-dcache-bug-fuse.patch
@@ -0,0 +1,46 @@
+--- a/fs/fuse/dev.c
++++ b/fs/fuse/dev.c
+@@ -639,11 +639,20 @@ static int fuse_copy_fill(struct fuse_co
+       return lock_request(cs->fc, cs->req);
+ }
+ 
++#ifdef DCACHE_BUG
++extern void (*fuse_flush_cache_all)(void);
++#endif
++
+ /* Do as much copy to/from userspace buffer as we can */
+ static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size)
+ {
+       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
+@@ -1203,6 +1203,10 @@ 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 workaround enabled\n");
++#endif
++
+       INIT_LIST_HEAD(&fuse_conn_list);
+       res = fuse_fs_init();
+       if (res)