Merge branch 'origin'

[karo-tx-linux.git] / fs / fuse / inode.c

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index d359d8de22a4540e14791054b6838a453dfe8828..879e6fba94803eca6a1844d9d14d500116086ae7 100644 (file)
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -397,6 +397,7 @@ static struct fuse_conn *new_conn(void)
                init_rwsem(&fc->sbput_sem);
                kobj_set_kset_s(fc, connections_subsys);
                kobject_init(&fc->kobj);
+               atomic_set(&fc->num_waiting, 0);
                for (i = 0; i < FUSE_MAX_OUTSTANDING; i++) {
                        struct fuse_req *req = fuse_request_alloc();
                        if (!req) {
@@ -464,6 +465,64 @@ static struct super_operations fuse_super_operations = {
        .show_options   = fuse_show_options,
 };
 
+static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
+{
+       int i;
+       struct fuse_init_out *arg = &req->misc.init_out;
+
+       if (req->out.h.error || arg->major != FUSE_KERNEL_VERSION)
+               fc->conn_error = 1;
+       else {
+               unsigned long ra_pages;
+
+               if (arg->minor >= 6) {
+                       ra_pages = arg->max_readahead / PAGE_CACHE_SIZE;
+                       if (arg->flags & FUSE_ASYNC_READ)
+                               fc->async_read = 1;
+               } else
+                       ra_pages = fc->max_read / PAGE_CACHE_SIZE;
+
+               fc->bdi.ra_pages = min(fc->bdi.ra_pages, ra_pages);
+               fc->minor = arg->minor;
+               fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;
+       }
+
+       /* After INIT reply is received other requests can go
+          out.  So do (FUSE_MAX_OUTSTANDING - 1) number of
+          up()s on outstanding_sem.  The last up() is done in
+          fuse_putback_request() */
+       for (i = 1; i < FUSE_MAX_OUTSTANDING; i++)
+               up(&fc->outstanding_sem);
+
+       fuse_put_request(fc, req);
+}
+
+static void fuse_send_init(struct fuse_conn *fc)
+{
+       /* This is called from fuse_read_super() so there's guaranteed
+          to be exactly one request available */
+       struct fuse_req *req = fuse_get_request(fc);
+       struct fuse_init_in *arg = &req->misc.init_in;
+
+       arg->major = FUSE_KERNEL_VERSION;
+       arg->minor = FUSE_KERNEL_MINOR_VERSION;
+       arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;
+       arg->flags |= FUSE_ASYNC_READ;
+       req->in.h.opcode = FUSE_INIT;
+       req->in.numargs = 1;
+       req->in.args[0].size = sizeof(*arg);
+       req->in.args[0].value = arg;
+       req->out.numargs = 1;
+       /* Variable length arguement used for backward compatibility
+          with interface version < 7.5.  Rest of init_out is zeroed
+          by do_get_request(), so a short reply is not a problem */
+       req->out.argvar = 1;
+       req->out.args[0].size = sizeof(struct fuse_init_out);
+       req->out.args[0].value = &req->misc.init_out;
+       req->end = process_init_reply;
+       request_send_background(fc, req);
+}
+
 static unsigned long long conn_id(void)
 {
        static unsigned long long ctr = 1;
@@ -505,8 +564,6 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
        fc->user_id = d.user_id;
        fc->group_id = d.group_id;
        fc->max_read = d.max_read;
-       if (fc->max_read / PAGE_CACHE_SIZE < fc->bdi.ra_pages)
-               fc->bdi.ra_pages = fc->max_read / PAGE_CACHE_SIZE;
 
        /* Used by get_root_inode() */
        sb->s_fs_info = fc;