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37 #define DEBUG_SUBSYSTEM S_LNET
39 #include "../../../include/linux/libcfs/libcfs.h"
41 #define LNET_MINOR 240
43 int libcfs_ioctl_getdata(char *buf, char *end, void __user *arg)
45 struct libcfs_ioctl_hdr *hdr;
46 struct libcfs_ioctl_data *data;
49 hdr = (struct libcfs_ioctl_hdr *)buf;
50 data = (struct libcfs_ioctl_data *)buf;
52 if (copy_from_user(buf, arg, sizeof(*hdr)))
55 if (hdr->ioc_version != LIBCFS_IOCTL_VERSION) {
56 CERROR("PORTALS: version mismatch kernel vs application\n");
60 if (hdr->ioc_len >= end - buf) {
61 CERROR("PORTALS: user buffer exceeds kernel buffer\n");
65 if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
66 CERROR("PORTALS: user buffer too small for ioctl\n");
70 orig_len = hdr->ioc_len;
71 if (copy_from_user(buf, arg, hdr->ioc_len))
73 if (orig_len != data->ioc_len)
76 if (libcfs_ioctl_is_invalid(data)) {
77 CERROR("PORTALS: ioctl not correctly formatted\n");
81 if (data->ioc_inllen1)
82 data->ioc_inlbuf1 = &data->ioc_bulk[0];
84 if (data->ioc_inllen2)
85 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
86 cfs_size_round(data->ioc_inllen1);
91 int libcfs_ioctl_popdata(void __user *arg, void *data, int size)
93 if (copy_to_user(arg, data, size))
99 libcfs_psdev_open(struct inode *inode, struct file *file)
105 if (libcfs_psdev_ops.p_open)
106 rc = libcfs_psdev_ops.p_open(0, NULL);
112 /* called when closing /dev/device */
114 libcfs_psdev_release(struct inode *inode, struct file *file)
120 if (libcfs_psdev_ops.p_close)
121 rc = libcfs_psdev_ops.p_close(0, NULL);
127 static long libcfs_ioctl(struct file *file,
128 unsigned int cmd, unsigned long arg)
130 struct cfs_psdev_file pfile;
133 if (!capable(CAP_SYS_ADMIN))
136 if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
137 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
138 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
139 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
140 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
144 /* Handle platform-dependent IOC requests */
146 case IOC_LIBCFS_PANIC:
147 if (!capable(CFS_CAP_SYS_BOOT))
149 panic("debugctl-invoked panic");
153 if (libcfs_psdev_ops.p_ioctl)
154 rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void __user *)arg);
160 static const struct file_operations libcfs_fops = {
161 .unlocked_ioctl = libcfs_ioctl,
162 .open = libcfs_psdev_open,
163 .release = libcfs_psdev_release,
166 struct miscdevice libcfs_dev = {
169 .fops = &libcfs_fops,