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i2c compat ioctls: move to ->compat_ioctl()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
abca5fc535
commit
7d5cb45655
2 changed files with 180 additions and 210 deletions
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@ -35,6 +35,7 @@
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#include <linux/notifier.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/compat.h>
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/*
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* An i2c_dev represents an i2c_adapter ... an I2C or SMBus master, not a
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@ -238,46 +239,29 @@ static int i2cdev_check_addr(struct i2c_adapter *adapter, unsigned int addr)
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}
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static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client,
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unsigned long arg)
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unsigned nmsgs, struct i2c_msg *msgs)
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{
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struct i2c_rdwr_ioctl_data rdwr_arg;
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struct i2c_msg *rdwr_pa;
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u8 __user **data_ptrs;
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int i, res;
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if (copy_from_user(&rdwr_arg,
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(struct i2c_rdwr_ioctl_data __user *)arg,
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sizeof(rdwr_arg)))
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return -EFAULT;
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/* Put an arbitrary limit on the number of messages that can
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* be sent at once */
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if (rdwr_arg.nmsgs > I2C_RDWR_IOCTL_MAX_MSGS)
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return -EINVAL;
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rdwr_pa = memdup_user(rdwr_arg.msgs,
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rdwr_arg.nmsgs * sizeof(struct i2c_msg));
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if (IS_ERR(rdwr_pa))
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return PTR_ERR(rdwr_pa);
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data_ptrs = kmalloc(rdwr_arg.nmsgs * sizeof(u8 __user *), GFP_KERNEL);
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data_ptrs = kmalloc(nmsgs * sizeof(u8 __user *), GFP_KERNEL);
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if (data_ptrs == NULL) {
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kfree(rdwr_pa);
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kfree(msgs);
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return -ENOMEM;
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}
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res = 0;
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for (i = 0; i < rdwr_arg.nmsgs; i++) {
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for (i = 0; i < nmsgs; i++) {
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/* Limit the size of the message to a sane amount */
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if (rdwr_pa[i].len > 8192) {
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if (msgs[i].len > 8192) {
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res = -EINVAL;
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break;
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}
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data_ptrs[i] = (u8 __user *)rdwr_pa[i].buf;
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rdwr_pa[i].buf = memdup_user(data_ptrs[i], rdwr_pa[i].len);
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if (IS_ERR(rdwr_pa[i].buf)) {
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res = PTR_ERR(rdwr_pa[i].buf);
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data_ptrs[i] = (u8 __user *)msgs[i].buf;
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msgs[i].buf = memdup_user(data_ptrs[i], msgs[i].len);
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if (IS_ERR(msgs[i].buf)) {
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res = PTR_ERR(msgs[i].buf);
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break;
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}
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@ -292,121 +276,117 @@ static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client,
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* greater (for example to account for a checksum byte at
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* the end of the message.)
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*/
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if (rdwr_pa[i].flags & I2C_M_RECV_LEN) {
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if (!(rdwr_pa[i].flags & I2C_M_RD) ||
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rdwr_pa[i].buf[0] < 1 ||
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rdwr_pa[i].len < rdwr_pa[i].buf[0] +
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if (msgs[i].flags & I2C_M_RECV_LEN) {
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if (!(msgs[i].flags & I2C_M_RD) ||
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msgs[i].buf[0] < 1 ||
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msgs[i].len < msgs[i].buf[0] +
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I2C_SMBUS_BLOCK_MAX) {
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res = -EINVAL;
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break;
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}
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rdwr_pa[i].len = rdwr_pa[i].buf[0];
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msgs[i].len = msgs[i].buf[0];
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}
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}
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if (res < 0) {
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int j;
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for (j = 0; j < i; ++j)
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kfree(rdwr_pa[j].buf);
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kfree(msgs[j].buf);
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kfree(data_ptrs);
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kfree(rdwr_pa);
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kfree(msgs);
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return res;
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}
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res = i2c_transfer(client->adapter, rdwr_pa, rdwr_arg.nmsgs);
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res = i2c_transfer(client->adapter, msgs, nmsgs);
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while (i-- > 0) {
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if (res >= 0 && (rdwr_pa[i].flags & I2C_M_RD)) {
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if (copy_to_user(data_ptrs[i], rdwr_pa[i].buf,
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rdwr_pa[i].len))
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if (res >= 0 && (msgs[i].flags & I2C_M_RD)) {
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if (copy_to_user(data_ptrs[i], msgs[i].buf,
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msgs[i].len))
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res = -EFAULT;
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}
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kfree(rdwr_pa[i].buf);
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kfree(msgs[i].buf);
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}
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kfree(data_ptrs);
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kfree(rdwr_pa);
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kfree(msgs);
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return res;
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}
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static noinline int i2cdev_ioctl_smbus(struct i2c_client *client,
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unsigned long arg)
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u8 read_write, u8 command, u32 size,
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union i2c_smbus_data __user *data)
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{
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struct i2c_smbus_ioctl_data data_arg;
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union i2c_smbus_data temp = {};
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int datasize, res;
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if (copy_from_user(&data_arg,
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(struct i2c_smbus_ioctl_data __user *) arg,
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sizeof(struct i2c_smbus_ioctl_data)))
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return -EFAULT;
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if ((data_arg.size != I2C_SMBUS_BYTE) &&
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(data_arg.size != I2C_SMBUS_QUICK) &&
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(data_arg.size != I2C_SMBUS_BYTE_DATA) &&
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(data_arg.size != I2C_SMBUS_WORD_DATA) &&
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(data_arg.size != I2C_SMBUS_PROC_CALL) &&
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(data_arg.size != I2C_SMBUS_BLOCK_DATA) &&
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(data_arg.size != I2C_SMBUS_I2C_BLOCK_BROKEN) &&
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(data_arg.size != I2C_SMBUS_I2C_BLOCK_DATA) &&
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(data_arg.size != I2C_SMBUS_BLOCK_PROC_CALL)) {
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if ((size != I2C_SMBUS_BYTE) &&
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(size != I2C_SMBUS_QUICK) &&
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(size != I2C_SMBUS_BYTE_DATA) &&
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(size != I2C_SMBUS_WORD_DATA) &&
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(size != I2C_SMBUS_PROC_CALL) &&
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(size != I2C_SMBUS_BLOCK_DATA) &&
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(size != I2C_SMBUS_I2C_BLOCK_BROKEN) &&
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(size != I2C_SMBUS_I2C_BLOCK_DATA) &&
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(size != I2C_SMBUS_BLOCK_PROC_CALL)) {
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dev_dbg(&client->adapter->dev,
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"size out of range (%x) in ioctl I2C_SMBUS.\n",
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data_arg.size);
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size);
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return -EINVAL;
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}
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/* Note that I2C_SMBUS_READ and I2C_SMBUS_WRITE are 0 and 1,
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so the check is valid if size==I2C_SMBUS_QUICK too. */
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if ((data_arg.read_write != I2C_SMBUS_READ) &&
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(data_arg.read_write != I2C_SMBUS_WRITE)) {
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if ((read_write != I2C_SMBUS_READ) &&
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(read_write != I2C_SMBUS_WRITE)) {
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dev_dbg(&client->adapter->dev,
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"read_write out of range (%x) in ioctl I2C_SMBUS.\n",
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data_arg.read_write);
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read_write);
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return -EINVAL;
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}
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/* Note that command values are always valid! */
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if ((data_arg.size == I2C_SMBUS_QUICK) ||
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((data_arg.size == I2C_SMBUS_BYTE) &&
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(data_arg.read_write == I2C_SMBUS_WRITE)))
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if ((size == I2C_SMBUS_QUICK) ||
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((size == I2C_SMBUS_BYTE) &&
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(read_write == I2C_SMBUS_WRITE)))
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/* These are special: we do not use data */
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return i2c_smbus_xfer(client->adapter, client->addr,
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client->flags, data_arg.read_write,
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data_arg.command, data_arg.size, NULL);
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client->flags, read_write,
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command, size, NULL);
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if (data_arg.data == NULL) {
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if (data == NULL) {
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dev_dbg(&client->adapter->dev,
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"data is NULL pointer in ioctl I2C_SMBUS.\n");
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return -EINVAL;
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}
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if ((data_arg.size == I2C_SMBUS_BYTE_DATA) ||
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(data_arg.size == I2C_SMBUS_BYTE))
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datasize = sizeof(data_arg.data->byte);
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else if ((data_arg.size == I2C_SMBUS_WORD_DATA) ||
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(data_arg.size == I2C_SMBUS_PROC_CALL))
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datasize = sizeof(data_arg.data->word);
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if ((size == I2C_SMBUS_BYTE_DATA) ||
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(size == I2C_SMBUS_BYTE))
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datasize = sizeof(data->byte);
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else if ((size == I2C_SMBUS_WORD_DATA) ||
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(size == I2C_SMBUS_PROC_CALL))
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datasize = sizeof(data->word);
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else /* size == smbus block, i2c block, or block proc. call */
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datasize = sizeof(data_arg.data->block);
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datasize = sizeof(data->block);
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if ((data_arg.size == I2C_SMBUS_PROC_CALL) ||
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(data_arg.size == I2C_SMBUS_BLOCK_PROC_CALL) ||
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(data_arg.size == I2C_SMBUS_I2C_BLOCK_DATA) ||
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(data_arg.read_write == I2C_SMBUS_WRITE)) {
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if (copy_from_user(&temp, data_arg.data, datasize))
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if ((size == I2C_SMBUS_PROC_CALL) ||
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(size == I2C_SMBUS_BLOCK_PROC_CALL) ||
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(size == I2C_SMBUS_I2C_BLOCK_DATA) ||
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(read_write == I2C_SMBUS_WRITE)) {
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if (copy_from_user(&temp, data, datasize))
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return -EFAULT;
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}
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if (data_arg.size == I2C_SMBUS_I2C_BLOCK_BROKEN) {
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if (size == I2C_SMBUS_I2C_BLOCK_BROKEN) {
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/* Convert old I2C block commands to the new
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convention. This preserves binary compatibility. */
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data_arg.size = I2C_SMBUS_I2C_BLOCK_DATA;
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if (data_arg.read_write == I2C_SMBUS_READ)
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size = I2C_SMBUS_I2C_BLOCK_DATA;
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if (read_write == I2C_SMBUS_READ)
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temp.block[0] = I2C_SMBUS_BLOCK_MAX;
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}
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res = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
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data_arg.read_write, data_arg.command, data_arg.size, &temp);
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if (!res && ((data_arg.size == I2C_SMBUS_PROC_CALL) ||
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(data_arg.size == I2C_SMBUS_BLOCK_PROC_CALL) ||
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(data_arg.read_write == I2C_SMBUS_READ))) {
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if (copy_to_user(data_arg.data, &temp, datasize))
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read_write, command, size, &temp);
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if (!res && ((size == I2C_SMBUS_PROC_CALL) ||
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(size == I2C_SMBUS_BLOCK_PROC_CALL) ||
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(read_write == I2C_SMBUS_READ))) {
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if (copy_to_user(data, &temp, datasize))
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return -EFAULT;
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}
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return res;
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@ -454,12 +434,39 @@ static long i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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funcs = i2c_get_functionality(client->adapter);
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return put_user(funcs, (unsigned long __user *)arg);
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case I2C_RDWR:
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return i2cdev_ioctl_rdwr(client, arg);
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case I2C_RDWR: {
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struct i2c_rdwr_ioctl_data rdwr_arg;
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struct i2c_msg *rdwr_pa;
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case I2C_SMBUS:
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return i2cdev_ioctl_smbus(client, arg);
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if (copy_from_user(&rdwr_arg,
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(struct i2c_rdwr_ioctl_data __user *)arg,
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sizeof(rdwr_arg)))
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return -EFAULT;
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/* Put an arbitrary limit on the number of messages that can
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* be sent at once */
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if (rdwr_arg.nmsgs > I2C_RDWR_IOCTL_MAX_MSGS)
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return -EINVAL;
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rdwr_pa = memdup_user(rdwr_arg.msgs,
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rdwr_arg.nmsgs * sizeof(struct i2c_msg));
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if (IS_ERR(rdwr_pa))
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return PTR_ERR(rdwr_pa);
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return i2cdev_ioctl_rdwr(client, rdwr_arg.nmsgs, rdwr_pa);
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}
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case I2C_SMBUS: {
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struct i2c_smbus_ioctl_data data_arg;
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if (copy_from_user(&data_arg,
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(struct i2c_smbus_ioctl_data __user *) arg,
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sizeof(struct i2c_smbus_ioctl_data)))
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return -EFAULT;
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return i2cdev_ioctl_smbus(client, data_arg.read_write,
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data_arg.command,
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data_arg.size,
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data_arg.data);
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}
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case I2C_RETRIES:
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client->adapter->retries = arg;
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break;
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@ -480,6 +487,90 @@ static long i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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return 0;
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}
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#ifdef CONFIG_COMPAT
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struct i2c_smbus_ioctl_data32 {
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u8 read_write;
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u8 command;
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u32 size;
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compat_caddr_t data; /* union i2c_smbus_data *data */
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};
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struct i2c_msg32 {
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u16 addr;
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u16 flags;
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u16 len;
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compat_caddr_t buf;
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};
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struct i2c_rdwr_ioctl_data32 {
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compat_caddr_t msgs; /* struct i2c_msg __user *msgs */
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u32 nmsgs;
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};
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static long compat_i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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struct i2c_client *client = file->private_data;
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unsigned long funcs;
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switch (cmd) {
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case I2C_FUNCS:
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funcs = i2c_get_functionality(client->adapter);
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return put_user(funcs, (compat_ulong_t __user *)arg);
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case I2C_RDWR: {
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struct i2c_rdwr_ioctl_data32 rdwr_arg;
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struct i2c_msg32 *p;
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struct i2c_msg *rdwr_pa;
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int i;
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if (copy_from_user(&rdwr_arg,
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(struct i2c_rdwr_ioctl_data32 __user *)arg,
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sizeof(rdwr_arg)))
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return -EFAULT;
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if (rdwr_arg.nmsgs > I2C_RDWR_IOCTL_MAX_MSGS)
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return -EINVAL;
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rdwr_pa = kmalloc_array(rdwr_arg.nmsgs, sizeof(struct i2c_msg),
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GFP_KERNEL);
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if (!rdwr_pa)
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return -ENOMEM;
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p = compat_ptr(rdwr_arg.msgs);
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for (i = 0; i < rdwr_arg.nmsgs; i++) {
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struct i2c_msg32 umsg;
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if (copy_from_user(&umsg, p + i, sizeof(umsg))) {
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kfree(rdwr_pa);
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return -EFAULT;
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}
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rdwr_pa[i] = (struct i2c_msg) {
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.addr = umsg.addr,
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.flags = umsg.flags,
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.len = umsg.len,
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.buf = compat_ptr(umsg.buf)
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};
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}
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return i2cdev_ioctl_rdwr(client, rdwr_arg.nmsgs, rdwr_pa);
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}
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case I2C_SMBUS: {
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struct i2c_smbus_ioctl_data32 data32;
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if (copy_from_user(&data32,
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(void __user *) arg,
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sizeof(data32)))
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return -EFAULT;
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return i2cdev_ioctl_smbus(client, data32.read_write,
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data32.command,
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data32.size,
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compat_ptr(data32.data));
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}
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default:
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return i2cdev_ioctl(file, cmd, arg);
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}
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}
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#else
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#define compat_i2cdev_ioctl NULL
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#endif
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static int i2cdev_open(struct inode *inode, struct file *file)
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{
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unsigned int minor = iminor(inode);
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@ -527,6 +618,7 @@ static const struct file_operations i2cdev_fops = {
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.read = i2cdev_read,
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.write = i2cdev_write,
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.unlocked_ioctl = i2cdev_ioctl,
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.compat_ioctl = compat_i2cdev_ioctl,
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.open = i2cdev_open,
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.release = i2cdev_release,
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};
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@ -53,8 +53,6 @@
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#include <linux/if_tun.h>
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#include <linux/ctype.h>
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#include <linux/syscalls.h>
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#include <linux/i2c.h>
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#include <linux/i2c-dev.h>
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#include <linux/atalk.h>
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#include <linux/gfp.h>
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#include <linux/cec.h>
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@ -136,22 +134,6 @@ static int do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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return vfs_ioctl(file, cmd, arg);
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}
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static int w_long(struct file *file,
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unsigned int cmd, compat_ulong_t __user *argp)
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{
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int err;
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unsigned long __user *valp = compat_alloc_user_space(sizeof(*valp));
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if (valp == NULL)
|
||||
return -EFAULT;
|
||||
err = do_ioctl(file, cmd, (unsigned long)valp);
|
||||
if (err)
|
||||
return err;
|
||||
if (convert_in_user(valp, argp))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct compat_video_event {
|
||||
int32_t type;
|
||||
compat_time_t timestamp;
|
||||
|
|
@ -670,96 +652,6 @@ static int serial_struct_ioctl(struct file *file,
|
|||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
* I2C layer ioctls
|
||||
*/
|
||||
|
||||
struct i2c_msg32 {
|
||||
u16 addr;
|
||||
u16 flags;
|
||||
u16 len;
|
||||
compat_caddr_t buf;
|
||||
};
|
||||
|
||||
struct i2c_rdwr_ioctl_data32 {
|
||||
compat_caddr_t msgs; /* struct i2c_msg __user *msgs */
|
||||
u32 nmsgs;
|
||||
};
|
||||
|
||||
struct i2c_smbus_ioctl_data32 {
|
||||
u8 read_write;
|
||||
u8 command;
|
||||
u32 size;
|
||||
compat_caddr_t data; /* union i2c_smbus_data *data */
|
||||
};
|
||||
|
||||
struct i2c_rdwr_aligned {
|
||||
struct i2c_rdwr_ioctl_data cmd;
|
||||
struct i2c_msg msgs[0];
|
||||
};
|
||||
|
||||
static int do_i2c_rdwr_ioctl(struct file *file,
|
||||
unsigned int cmd, struct i2c_rdwr_ioctl_data32 __user *udata)
|
||||
{
|
||||
struct i2c_rdwr_aligned __user *tdata;
|
||||
struct i2c_msg __user *tmsgs;
|
||||
struct i2c_msg32 __user *umsgs;
|
||||
compat_caddr_t datap;
|
||||
u32 nmsgs;
|
||||
int i;
|
||||
|
||||
if (get_user(nmsgs, &udata->nmsgs))
|
||||
return -EFAULT;
|
||||
if (nmsgs > I2C_RDWR_IOCTL_MAX_MSGS)
|
||||
return -EINVAL;
|
||||
|
||||
if (get_user(datap, &udata->msgs))
|
||||
return -EFAULT;
|
||||
umsgs = compat_ptr(datap);
|
||||
|
||||
tdata = compat_alloc_user_space(sizeof(*tdata) +
|
||||
nmsgs * sizeof(struct i2c_msg));
|
||||
tmsgs = &tdata->msgs[0];
|
||||
|
||||
if (put_user(nmsgs, &tdata->cmd.nmsgs) ||
|
||||
put_user(tmsgs, &tdata->cmd.msgs))
|
||||
return -EFAULT;
|
||||
|
||||
for (i = 0; i < nmsgs; i++) {
|
||||
if (copy_in_user(&tmsgs[i].addr, &umsgs[i].addr, 3*sizeof(u16)))
|
||||
return -EFAULT;
|
||||
if (get_user(datap, &umsgs[i].buf) ||
|
||||
put_user(compat_ptr(datap), &tmsgs[i].buf))
|
||||
return -EFAULT;
|
||||
}
|
||||
return do_ioctl(file, cmd, (unsigned long)tdata);
|
||||
}
|
||||
|
||||
static int do_i2c_smbus_ioctl(struct file *file,
|
||||
unsigned int cmd, struct i2c_smbus_ioctl_data32 __user *udata)
|
||||
{
|
||||
struct i2c_smbus_ioctl_data __user *tdata;
|
||||
union {
|
||||
/* beginnings of those have identical layouts */
|
||||
struct i2c_smbus_ioctl_data32 data32;
|
||||
struct i2c_smbus_ioctl_data data;
|
||||
} v;
|
||||
|
||||
tdata = compat_alloc_user_space(sizeof(*tdata));
|
||||
if (tdata == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
memset(&v, 0, sizeof(v));
|
||||
if (copy_from_user(&v.data32, udata, sizeof(v.data32)))
|
||||
return -EFAULT;
|
||||
v.data.data = compat_ptr(v.data32.data);
|
||||
|
||||
if (copy_to_user(tdata, &v.data, sizeof(v.data)))
|
||||
return -EFAULT;
|
||||
|
||||
return do_ioctl(file, cmd, (unsigned long)tdata);
|
||||
}
|
||||
|
||||
#define RTC_IRQP_READ32 _IOR('p', 0x0b, compat_ulong_t)
|
||||
#define RTC_IRQP_SET32 _IOW('p', 0x0c, compat_ulong_t)
|
||||
#define RTC_EPOCH_READ32 _IOR('p', 0x0d, compat_ulong_t)
|
||||
|
|
@ -1282,13 +1174,6 @@ COMPATIBLE_IOCTL(PCIIOC_CONTROLLER)
|
|||
COMPATIBLE_IOCTL(PCIIOC_MMAP_IS_IO)
|
||||
COMPATIBLE_IOCTL(PCIIOC_MMAP_IS_MEM)
|
||||
COMPATIBLE_IOCTL(PCIIOC_WRITE_COMBINE)
|
||||
/* i2c */
|
||||
COMPATIBLE_IOCTL(I2C_SLAVE)
|
||||
COMPATIBLE_IOCTL(I2C_SLAVE_FORCE)
|
||||
COMPATIBLE_IOCTL(I2C_TENBIT)
|
||||
COMPATIBLE_IOCTL(I2C_PEC)
|
||||
COMPATIBLE_IOCTL(I2C_RETRIES)
|
||||
COMPATIBLE_IOCTL(I2C_TIMEOUT)
|
||||
/* hiddev */
|
||||
COMPATIBLE_IOCTL(HIDIOCGVERSION)
|
||||
COMPATIBLE_IOCTL(HIDIOCAPPLICATION)
|
||||
|
|
@ -1463,13 +1348,6 @@ static long do_ioctl_trans(unsigned int cmd,
|
|||
case TIOCGSERIAL:
|
||||
case TIOCSSERIAL:
|
||||
return serial_struct_ioctl(file, cmd, argp);
|
||||
/* i2c */
|
||||
case I2C_FUNCS:
|
||||
return w_long(file, cmd, argp);
|
||||
case I2C_RDWR:
|
||||
return do_i2c_rdwr_ioctl(file, cmd, argp);
|
||||
case I2C_SMBUS:
|
||||
return do_i2c_smbus_ioctl(file, cmd, argp);
|
||||
/* Not implemented in the native kernel */
|
||||
case RTC_IRQP_READ32:
|
||||
case RTC_IRQP_SET32:
|
||||
|
|
|
|||
Loading…
Reference in a new issue