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authorPavel Emelyanov <xemul@openvz.org>2013-10-10 17:10:04 +0400
committerAlex Shi <alex.shi@linaro.org>2015-04-20 13:24:34 +0800
commit4a40d2a3f50fd5721e3c8896e077d3f62f5b73be (patch)
tree8ab776366d11b9b63d430a4fec914364f70c1f3d /fs
parent77dfdd746390b9230ac5420f13dd363bcdac6e98 (diff)
downloadlinux-linaro-stable-4a40d2a3f50fd5721e3c8896e077d3f62f5b73be.tar.gz
fuse: Linking file to inode helper
When writeback is ON every writeable file should be in per-inode write list, not only mmap-ed ones. Thus introduce a helper for this linkage. Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> (cherry picked from commit 650b22b941fa03590c4a3671e79ec2c96ea59e9a) Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/fuse/file.c33
1 files changed, 19 insertions, 14 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index d8a60270581c..f0183869252f 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -188,6 +188,22 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
}
EXPORT_SYMBOL_GPL(fuse_do_open);
+static void fuse_link_write_file(struct file *file)
+{
+ struct inode *inode = file_inode(file);
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_inode *fi = get_fuse_inode(inode);
+ struct fuse_file *ff = file->private_data;
+ /*
+ * file may be written through mmap, so chain it onto the
+ * inodes's write_file list
+ */
+ spin_lock(&fc->lock);
+ if (list_empty(&ff->write_entry))
+ list_add(&ff->write_entry, &fi->write_files);
+ spin_unlock(&fc->lock);
+}
+
void fuse_finish_open(struct inode *inode, struct file *file)
{
struct fuse_file *ff = file->private_data;
@@ -1942,20 +1958,9 @@ static const struct vm_operations_struct fuse_file_vm_ops = {
static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
{
- if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE)) {
- struct inode *inode = file_inode(file);
- struct fuse_conn *fc = get_fuse_conn(inode);
- struct fuse_inode *fi = get_fuse_inode(inode);
- struct fuse_file *ff = file->private_data;
- /*
- * file may be written through mmap, so chain it onto the
- * inodes's write_file list
- */
- spin_lock(&fc->lock);
- if (list_empty(&ff->write_entry))
- list_add(&ff->write_entry, &fi->write_files);
- spin_unlock(&fc->lock);
- }
+ if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE))
+ fuse_link_write_file(file);
+
file_accessed(file);
vma->vm_ops = &fuse_file_vm_ops;
return 0;