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fuse: fix ioctl ABI

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In kernel ABI version 7.16 and later FUSE_IOCTL_RETRY reply from a
unrestricted IOCTL request shall return with an array of 'struct
fuse_ioctl_iovec' instead of 'struct iovec'.  This fixes the ABI
ambiguity of 32bit vs. 64bit.

Reported-by: "ccmail111" <ccmail111@yahoo.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Tejun Heo <tj@kernel.org>
This commit is contained in:
Miklos Szeredi
2010-12-07 20:16:56 +01:00
parent 02c048b919
commit 1baa26b2be
2 changed files with 58 additions and 5 deletions
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10
include/linux/fuse.h
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@@ -44,6 +44,9 @@
*
* 7.16
* - add BATCH_FORGET request
* - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
* fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
* - add FUSE_IOCTL_32BIT flag
*/
#ifndef _LINUX_FUSE_H
@@ -203,12 +206,14 @@ struct fuse_file_lock {
* FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
* FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
* FUSE_IOCTL_RETRY: retry with new iovecs
* FUSE_IOCTL_32BIT: 32bit ioctl
*
* FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
*/
#define FUSE_IOCTL_COMPAT (1 << 0)
#define FUSE_IOCTL_UNRESTRICTED (1 << 1)
#define FUSE_IOCTL_RETRY (1 << 2)
#define FUSE_IOCTL_32BIT (1 << 3)
#define FUSE_IOCTL_MAX_IOV 256
@@ -524,6 +529,11 @@ struct fuse_ioctl_in {
__u32 out_size;
};
struct fuse_ioctl_iovec {
__u64 base;
__u64 len;
};
struct fuse_ioctl_out {
__s32 result;
__u32 flags;