2 files changed, 46 insertions, 1 deletions

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 504e61b7fd75..e3fee88831d4 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2171,6 +2171,37 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
         return ret;
 }
 
+long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
+                            loff_t length)
+{
+        struct fuse_file *ff = file->private_data;
+        struct fuse_conn *fc = ff->fc;
+        struct fuse_req *req;
+        struct fuse_fallocate_in inarg = {
+                .fh = ff->fh,
+                .offset = offset,
+                .length = length,
+                .mode = mode
+        };
+        int err;
+
+        req = fuse_get_req(fc);
+        if (IS_ERR(req))
+                return PTR_ERR(req);
+
+        req->in.h.opcode = FUSE_FALLOCATE;
+        req->in.h.nodeid = ff->nodeid;
+        req->in.numargs = 1;
+        req->in.args[0].size = sizeof(inarg);
+        req->in.args[0].value = &inarg;
+        fuse_request_send(fc, req);
+        err = req->out.h.error;
+        fuse_put_request(fc, req);
+
+        return err;
+}
+EXPORT_SYMBOL_GPL(fuse_file_fallocate);
+
 static const struct file_operations fuse_file_operations = {
         .llseek         = fuse_file_llseek,
         .read           = do_sync_read,
@@ -2188,6 +2219,7 @@ static const struct file_operations fuse_file_operations = {
         .unlocked_ioctl = fuse_file_ioctl,
         .compat_ioctl   = fuse_file_compat_ioctl,
         .poll           = fuse_file_poll,
+        .fallocate      = fuse_file_fallocate,
 };
 
 static const struct file_operations fuse_direct_io_file_operations = {
@@ -2204,6 +2236,7 @@ static const struct file_operations fuse_direct_io_file_operations = {
         .unlocked_ioctl = fuse_file_ioctl,
         .compat_ioctl   = fuse_file_compat_ioctl,
         .poll           = fuse_file_poll,
+        .fallocate      = fuse_file_fallocate,
         /* no splice_read */
 };
 
diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index 8f2ab8fef929..9303348965fb 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -54,6 +54,9 @@
  * 7.18
  *  - add FUSE_IOCTL_DIR flag
  *  - add FUSE_NOTIFY_DELETE
+ *
+ * 7.19
+ *  - add FUSE_FALLOCATE
  */
 
 #ifndef _LINUX_FUSE_H
@@ -85,7 +88,7 @@
 #define FUSE_KERNEL_VERSION 7
 
 /** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 18
+#define FUSE_KERNEL_MINOR_VERSION 19
 
 /** The node ID of the root inode */
 #define FUSE_ROOT_ID 1
@@ -278,6 +281,7 @@ enum fuse_opcode {
         FUSE_POLL          = 40,
         FUSE_NOTIFY_REPLY  = 41,
         FUSE_BATCH_FORGET  = 42,
+        FUSE_FALLOCATE     = 43,
 
         /* CUSE specific operations */
         CUSE_INIT          = 4096,
@@ -571,6 +575,14 @@ struct fuse_notify_poll_wakeup_out {
         __u64   kh;
 };
 
+struct fuse_fallocate_in {
+        __u64   fh;
+        __u64   offset;
+        __u64   length;
+        __u32   mode;
+        __u32   padding;
+};
+
 struct fuse_in_header {
         __u32   len;
         __u32   opcode;