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Add support for 32-bit compatibility IOCTLs in the LinuxKPI.

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Bump the FreeBSD version to force recompilation of external
kernel modules due to structure change.

PR:		222504
Submitted by:	Greg V <greg@unrelenting.technology>
MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
hselasky 2017-09-22 08:12:08 +00:00
parent bb780d8fb8
commit 10ef676c4b
3 changed files with 16 additions and 3 deletions
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2
sys/compat/linuxkpi/common/include/linux/fs.h
View File

@ -137,6 +137,7 @@ struct file_operations {
ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long);
long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
int (*mmap)(struct file *, struct vm_area_struct *);
int (*open)(struct inode *, struct file *);
int (*release)(struct inode *, struct file *);
@ -157,7 +158,6 @@ struct file_operations {
int (*readdir)(struct file *, void *, filldir_t);
int (*ioctl)(struct inode *, struct file *, unsigned int,
unsigned long);
long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
int (*flush)(struct file *, fl_owner_t id);
int (*fsync)(struct file *, struct dentry *, int datasync);
int (*aio_fsync)(struct kiocb *, int datasync);

15
sys/compat/linuxkpi/common/src/linux_compat.c
View File

@ -906,7 +906,20 @@ linux_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
/* fetch user-space pointer */
data = *(void **)data;
}
if (filp->f_op->unlocked_ioctl)
#if defined(__amd64__)
if (td->td_proc->p_elf_machine == EM_386) {
/* try the compat IOCTL handler first */
if (filp->f_op->compat_ioctl != NULL)
error = -filp->f_op->compat_ioctl(filp, cmd, (u_long)data);
else
error = ENOTTY;
/* fallback to the regular IOCTL handler, if any */
if (error == ENOTTY && filp->f_op->unlocked_ioctl != NULL)
error = -filp->f_op->unlocked_ioctl(filp, cmd, (u_long)data);
} else
#endif
if (filp->f_op->unlocked_ioctl != NULL)
error = -filp->f_op->unlocked_ioctl(filp, cmd, (u_long)data);
else
error = ENOTTY;

2
sys/sys/param.h
View File

@ -58,7 +58,7 @@
* in the range 5 to 9.
*/
#undef __FreeBSD_version
#define __FreeBSD_version 1200045 /* Master, propagated to newvers */
#define __FreeBSD_version 1200046 /* Master, propagated to newvers */
/*
* __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,