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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 *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 *arg, void *data, int size)
93 if (copy_to_user((char *)arg, data, size))
99 libcfs_psdev_open(struct inode *inode, struct file *file)
101 struct libcfs_device_userstate **pdu = NULL;
106 pdu = (struct libcfs_device_userstate **)&file->private_data;
107 if (libcfs_psdev_ops.p_open != NULL)
108 rc = libcfs_psdev_ops.p_open(0, (void *)pdu);
114 /* called when closing /dev/device */
116 libcfs_psdev_release(struct inode *inode, struct file *file)
118 struct libcfs_device_userstate *pdu;
123 pdu = file->private_data;
124 if (libcfs_psdev_ops.p_close != NULL)
125 rc = libcfs_psdev_ops.p_close(0, (void *)pdu);
131 static long libcfs_ioctl(struct file *file,
132 unsigned int cmd, unsigned long arg)
134 struct cfs_psdev_file pfile;
137 if (!capable(CAP_SYS_ADMIN))
140 if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
141 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
142 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
143 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
144 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
148 /* Handle platform-dependent IOC requests */
150 case IOC_LIBCFS_PANIC:
151 if (!capable(CFS_CAP_SYS_BOOT))
153 panic("debugctl-invoked panic");
155 case IOC_LIBCFS_MEMHOG:
156 if (!capable(CFS_CAP_SYS_ADMIN))
162 pfile.private_data = file->private_data;
163 if (libcfs_psdev_ops.p_ioctl != NULL)
164 rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void *)arg);
170 static const struct file_operations libcfs_fops = {
171 .unlocked_ioctl = libcfs_ioctl,
172 .open = libcfs_psdev_open,
173 .release = libcfs_psdev_release,
176 struct miscdevice libcfs_dev = {
179 .fops = &libcfs_fops,