On Wed 20 Jan 2016 03:38:41 PM PST, Jann Horn wrote:
On Wed, Jan 20, 2016 at 03:20:34PM -0800, Nikhilesh Reddy wrote:
Add support for filesystem passthrough read/write of files
when enabled in userspace through the option FUSE_PASSTHROUGH.
[...]
+ daemon_fd = (int)open_out->passthrough_fd;
+ if (daemon_fd < 0)
+ return;
+
+ passthrough_filp = fget_raw(daemon_fd);
+ if (!passthrough_filp)
+ return;
+
+ passthrough_inode = file_inode(passthrough_filp);
+ passthrough_sb = passthrough_inode->i_sb;
+ fs_stack_depth = passthrough_sb->s_stack_depth + 1;
+
+ /* If we reached the stacking limit go through regular io */
+ if (fs_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) {
+ pr_err("FUSE: maximum fs stacking depth exceeded, cannot use passthrough for this file\n");
+ return;
+ }
I think this needs an fput() in the error case to prevent a refcount leak.
Whoops my bad .. forgot to commit! :(
Thanks for the catch
fixed ... sending patch v4 in a few minutes
--
Thanks
Nikhilesh Reddy
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
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