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37 #define DEBUG_SUBSYSTEM S_LNET
39 #include <libcfs/libcfs.h>
41 #define LNET_MINOR 240
43 int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
47 if (libcfs_ioctl_is_invalid(data)) {
48 CERROR("libcfs ioctl: parameter not correctly formatted\n");
52 if (data->ioc_inllen1 != 0)
53 data->ioc_inlbuf1 = &data->ioc_bulk[0];
55 if (data->ioc_inllen2 != 0)
56 data->ioc_inlbuf2 = &data->ioc_bulk[0] +
57 cfs_size_round(data->ioc_inllen1);
62 int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
63 struct libcfs_ioctl_hdr __user *uhdr)
65 struct libcfs_ioctl_hdr hdr;
69 if (copy_from_user(&hdr, uhdr, sizeof(hdr)))
72 if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
73 hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
74 CERROR("libcfs ioctl: version mismatch expected %#x, got %#x\n",
75 LIBCFS_IOCTL_VERSION, hdr.ioc_version);
79 if (hdr.ioc_len < sizeof(struct libcfs_ioctl_data)) {
80 CERROR("libcfs ioctl: user buffer too small for ioctl\n");
84 if (hdr.ioc_len > LIBCFS_IOC_DATA_MAX) {
85 CERROR("libcfs ioctl: user buffer is too large %d/%d\n",
86 hdr.ioc_len, LIBCFS_IOC_DATA_MAX);
90 LIBCFS_ALLOC(*hdr_pp, hdr.ioc_len);
94 if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len))
95 GOTO(failed, err = -EFAULT);
99 libcfs_ioctl_freedata(*hdr_pp);
104 libcfs_psdev_open(struct inode * inode, struct file * file)
106 struct libcfs_device_userstate **pdu = NULL;
111 pdu = (struct libcfs_device_userstate **)&file->private_data;
112 if (libcfs_psdev_ops.p_open != NULL)
113 rc = libcfs_psdev_ops.p_open(0, (void *)pdu);
119 /* called when closing /dev/device */
121 libcfs_psdev_release(struct inode * inode, struct file * file)
123 struct libcfs_device_userstate *pdu;
128 pdu = file->private_data;
129 if (libcfs_psdev_ops.p_close != NULL)
130 rc = libcfs_psdev_ops.p_close(0, (void *)pdu);
136 static long libcfs_ioctl(struct file *file,
137 unsigned int cmd, unsigned long arg)
139 struct cfs_psdev_file pfile;
142 if (!capable(CAP_SYS_ADMIN))
145 if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
146 _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
147 _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
148 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
149 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
153 /* Handle platform-dependent IOC requests */
155 case IOC_LIBCFS_PANIC:
156 if (!cfs_capable(CFS_CAP_SYS_BOOT))
158 panic("debugctl-invoked panic");
160 case IOC_LIBCFS_MEMHOG:
161 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
167 pfile.private_data = file->private_data;
168 if (libcfs_psdev_ops.p_ioctl != NULL)
169 rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void __user *)arg);
175 static struct file_operations libcfs_fops = {
176 unlocked_ioctl: libcfs_ioctl,
177 open : libcfs_psdev_open,
178 release : libcfs_psdev_release
181 struct miscdevice libcfs_dev = {