diff options
| -rw-r--r-- | fs/ioctl.c | 164 |
1 files changed, 84 insertions, 80 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c index c2a773e8620b..652cacf433ff 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -12,8 +12,8 @@ #include <linux/fs.h> #include <linux/security.h> #include <linux/module.h> +#include <linux/uaccess.h> -#include <asm/uaccess.h> #include <asm/ioctls.h> static long do_ioctl(struct file *filp, unsigned int cmd, @@ -45,31 +45,31 @@ static int file_ioctl(struct file *filp, unsigned int cmd, { int error; int block; - struct inode * inode = filp->f_path.dentry->d_inode; + struct inode *inode = filp->f_path.dentry->d_inode; int __user *p = (int __user *)arg; switch (cmd) { - case FIBMAP: - { - struct address_space *mapping = filp->f_mapping; - int res; - /* do we support this mess? */ - if (!mapping->a_ops->bmap) - return -EINVAL; - if (!capable(CAP_SYS_RAWIO)) - return -EPERM; - if ((error = get_user(block, p)) != 0) - return error; - - lock_kernel(); - res = mapping->a_ops->bmap(mapping, block); - unlock_kernel(); - return put_user(res, p); - } - case FIGETBSZ: - return put_user(inode->i_sb->s_blocksize, p); - case FIONREAD: - return put_user(i_size_read(inode) - filp->f_pos, p); + case FIBMAP: + { + struct address_space *mapping = filp->f_mapping; + int res; + /* do we support this mess? */ + if (!mapping->a_ops->bmap) + return -EINVAL; + if (!capable(CAP_SYS_RAWIO)) + return -EPERM; + error = get_user(block, p); + if (error) + return error; + lock_kernel(); + res = mapping->a_ops->bmap(mapping, block); + unlock_kernel(); + return put_user(res, p); + } + case FIGETBSZ: + return put_user(inode->i_sb->s_blocksize, p); + case FIONREAD: + return put_user(i_size_read(inode) - filp->f_pos, p); } return do_ioctl(filp, cmd, arg); @@ -82,81 +82,85 @@ static int file_ioctl(struct file *filp, unsigned int cmd, * vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d. * It's just a simple helper for sys_ioctl and compat_sys_ioctl. */ -int vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, unsigned long arg) +int vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, + unsigned long arg) { unsigned int flag; int on, error = 0; switch (cmd) { - case FIOCLEX: - set_close_on_exec(fd, 1); - break; + case FIOCLEX: + set_close_on_exec(fd, 1); + break; - case FIONCLEX: - set_close_on_exec(fd, 0); - break; + case FIONCLEX: + set_close_on_exec(fd, 0); + break; - case FIONBIO: - if ((error = get_user(on, (int __user *)arg)) != 0) - break; - flag = O_NONBLOCK; + case FIONBIO: + error = get_user(on, (int __user *)arg); + if (error) + break; + flag = O_NONBLOCK; #ifdef __sparc__ - /* SunOS compatibility item. */ - if(O_NONBLOCK != O_NDELAY) - flag |= O_NDELAY; + /* SunOS compatibility item. */ + if (O_NONBLOCK != O_NDELAY) + flag |= O_NDELAY; #endif - if (on) - filp->f_flags |= flag; - else - filp->f_flags &= ~flag; + if (on) + filp->f_flags |= flag; + else + filp->f_flags &= ~flag; + break; + + case FIOASYNC: + error = get_user(on, (int __user *)arg); + if (error) break; - - case FIOASYNC: - if ((error = get_user(on, (int __user *)arg)) != 0) - break; - flag = on ? FASYNC : 0; - - /* Did FASYNC state change ? */ - if ((flag ^ filp->f_flags) & FASYNC) { - if (filp->f_op && filp->f_op->fasync) { - lock_kernel(); - error = filp->f_op->fasync(fd, filp, on); - unlock_kernel(); - } - else error = -ENOTTY; - } - if (error != 0) - break; - - if (on) - filp->f_flags |= FASYNC; - else - filp->f_flags &= ~FASYNC; - break; - - case FIOQSIZE: - if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) || - S_ISREG(filp->f_path.dentry->d_inode->i_mode) || - S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) { - loff_t res = inode_get_bytes(filp->f_path.dentry->d_inode); - error = copy_to_user((loff_t __user *)arg, &res, sizeof(res)) ? -EFAULT : 0; - } - else + flag = on ? FASYNC : 0; + + /* Did FASYNC state change ? */ + if ((flag ^ filp->f_flags) & FASYNC) { + if (filp->f_op && filp->f_op->fasync) { + lock_kernel(); + error = filp->f_op->fasync(fd, filp, on); + unlock_kernel(); + } else error = -ENOTTY; + } + if (error != 0) break; - default: - if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) - error = file_ioctl(filp, cmd, arg); - else - error = do_ioctl(filp, cmd, arg); - break; + + if (on) + filp->f_flags |= FASYNC; + else + filp->f_flags &= ~FASYNC; + break; + + case FIOQSIZE: + if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) || + S_ISREG(filp->f_path.dentry->d_inode->i_mode) || + S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) { + loff_t res = + inode_get_bytes(filp->f_path.dentry->d_inode); + error = copy_to_user((loff_t __user *)arg, &res, + sizeof(res)) ? -EFAULT : 0; + } else + error = -ENOTTY; + break; + default: + if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) + error = file_ioctl(filp, cmd, arg); + else + error = do_ioctl(filp, cmd, arg); + break; } return error; } asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg) { - struct file * filp; + struct file *filp; int error = -EBADF; int fput_needed; |