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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");
66 if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
67 CERROR("PORTALS: user buffer too small for ioctl\n");
71 orig_len = hdr->ioc_len;
72 if (copy_from_user(buf, arg, hdr->ioc_len))
74 if (orig_len != data->ioc_len)
77 if (libcfs_ioctl_is_invalid(data)) {
78 CERROR("PORTALS: ioctl not correctly formatted\n");
82 if (data->ioc_inllen1)
83 data->ioc_inlbuf1 = &data->ioc_bulk[0];
85 if (data->ioc_inllen2)
86 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
87 cfs_size_round(data->ioc_inllen1);
92 int libcfs_ioctl_popdata(void *arg, void *data, int size)
94 if (copy_to_user((char *)arg, data, size))
100 libcfs_psdev_open(struct inode *inode, struct file *file)
102 struct libcfs_device_userstate **pdu = NULL;
107 pdu = (struct libcfs_device_userstate **)&file->private_data;
108 if (libcfs_psdev_ops.p_open != NULL)
109 rc = libcfs_psdev_ops.p_open(0, (void *)pdu);
115 /* called when closing /dev/device */
117 libcfs_psdev_release(struct inode *inode, struct file *file)
119 struct libcfs_device_userstate *pdu;
124 pdu = file->private_data;
125 if (libcfs_psdev_ops.p_close != NULL)
126 rc = libcfs_psdev_ops.p_close(0, (void *)pdu);
132 static long libcfs_ioctl(struct file *file,
133 unsigned int cmd, unsigned long arg)
135 struct cfs_psdev_file pfile;
138 if (!capable(CAP_SYS_ADMIN))
141 if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
142 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
143 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
144 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
145 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
149 /* Handle platform-dependent IOC requests */
151 case IOC_LIBCFS_PANIC:
152 if (!capable(CFS_CAP_SYS_BOOT))
154 panic("debugctl-invoked panic");
156 case IOC_LIBCFS_MEMHOG:
157 if (!capable(CFS_CAP_SYS_ADMIN))
163 pfile.private_data = file->private_data;
164 if (libcfs_psdev_ops.p_ioctl != NULL)
165 rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void *)arg);
171 static const struct file_operations libcfs_fops = {
172 .unlocked_ioctl = libcfs_ioctl,
173 .open = libcfs_psdev_open,
174 .release = libcfs_psdev_release,
177 struct miscdevice libcfs_dev = {
180 .fops = &libcfs_fops,