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Provide support for fdevname(3) on linuxkpi-backed devices.

Browse Source 
Reported and tested by:	manu
Reviewed by:	hselasky, manu
Sponsored by:	Mellanox Technologies
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D23386
This commit is contained in:
Konstantin Belousov 2020-01-28 11:22:20 +00:00
parent dc13edbc7d
commit 2a3529df1d
1 changed files with 20 additions and 1 deletions
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21
sys/compat/linuxkpi/common/src/linux_compat.c
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@ -1526,7 +1526,9 @@ linux_file_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *cred,
struct linux_file *filp;
const struct file_operations *fop;
struct linux_cdev *ldev;
int error;
struct fiodgname_arg *fgn;
const char *p;
int error, i;
error = 0;
filp = (struct linux_file *)fp->f_data;
@ -1554,6 +1556,23 @@ linux_file_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *cred,
case FIOGETOWN:
*(int *)data = fgetown(&filp->f_sigio);
break;
case FIODGNAME:
#ifdef COMPAT_FREEBSD32
case FIODGNAME_32:
#endif
if (filp->f_cdev == NULL || filp->f_cdev->cdev == NULL) {
error = ENXIO;
break;
}
fgn = data;
p = devtoname(filp->f_cdev->cdev);
i = strlen(p) + 1;
if (i > fgn->len) {
error = EINVAL;
break;
}
error = copyout(p, fiodgname_buf_get_ptr(fgn, cmd), i);
break;
default:
error = linux_file_ioctl_sub(fp, filp, fop, cmd, data, td);
break;