mirror of https://gitee.com/openkylin/linux.git
VFS: apply coding standards to fs/ioctl.c
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Erez Zadok
Linus Torvalds
parent
4aa323bd83
commit
c9845ff1df
162
fs/ioctl.c
162
fs/ioctl.c
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@ -12,8 +12,8 @@
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#include <linux/fs.h>
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#include <linux/security.h>
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#include <linux/module.h>
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#include <linux/uaccess.h>
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#include <asm/uaccess.h>
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#include <asm/ioctls.h>
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static long do_ioctl(struct file *filp, unsigned int cmd,
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@ -45,31 +45,31 @@ static int file_ioctl(struct file *filp, unsigned int cmd,
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{
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int error;
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int block;
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struct inode * inode = filp->f_path.dentry->d_inode;
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struct inode *inode = filp->f_path.dentry->d_inode;
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int __user *p = (int __user *)arg;
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switch (cmd) {
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case FIBMAP:
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{
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struct address_space *mapping = filp->f_mapping;
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int res;
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/* do we support this mess? */
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if (!mapping->a_ops->bmap)
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return -EINVAL;
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
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if ((error = get_user(block, p)) != 0)
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return error;
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lock_kernel();
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res = mapping->a_ops->bmap(mapping, block);
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unlock_kernel();
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return put_user(res, p);
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}
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case FIGETBSZ:
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return put_user(inode->i_sb->s_blocksize, p);
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case FIONREAD:
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return put_user(i_size_read(inode) - filp->f_pos, p);
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case FIBMAP:
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{
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struct address_space *mapping = filp->f_mapping;
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int res;
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/* do we support this mess? */
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if (!mapping->a_ops->bmap)
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return -EINVAL;
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
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error = get_user(block, p);
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if (error)
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return error;
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lock_kernel();
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res = mapping->a_ops->bmap(mapping, block);
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unlock_kernel();
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return put_user(res, p);
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}
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case FIGETBSZ:
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return put_user(inode->i_sb->s_blocksize, p);
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case FIONREAD:
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return put_user(i_size_read(inode) - filp->f_pos, p);
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}
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return do_ioctl(filp, cmd, arg);
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@ -82,81 +82,85 @@ static int file_ioctl(struct file *filp, unsigned int cmd,
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* vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
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* It's just a simple helper for sys_ioctl and compat_sys_ioctl.
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*/
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int vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, unsigned long arg)
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int vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
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unsigned long arg)
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{
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unsigned int flag;
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int on, error = 0;
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switch (cmd) {
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case FIOCLEX:
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set_close_on_exec(fd, 1);
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break;
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case FIOCLEX:
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set_close_on_exec(fd, 1);
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break;
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case FIONCLEX:
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set_close_on_exec(fd, 0);
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break;
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case FIONCLEX:
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set_close_on_exec(fd, 0);
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break;
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case FIONBIO:
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if ((error = get_user(on, (int __user *)arg)) != 0)
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break;
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flag = O_NONBLOCK;
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case FIONBIO:
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error = get_user(on, (int __user *)arg);
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if (error)
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break;
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flag = O_NONBLOCK;
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#ifdef __sparc__
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/* SunOS compatibility item. */
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if(O_NONBLOCK != O_NDELAY)
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flag |= O_NDELAY;
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/* SunOS compatibility item. */
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if (O_NONBLOCK != O_NDELAY)
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flag |= O_NDELAY;
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#endif
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if (on)
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filp->f_flags |= flag;
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else
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filp->f_flags &= ~flag;
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if (on)
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filp->f_flags |= flag;
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else
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filp->f_flags &= ~flag;
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break;
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case FIOASYNC:
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error = get_user(on, (int __user *)arg);
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if (error)
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break;
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flag = on ? FASYNC : 0;
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case FIOASYNC:
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if ((error = get_user(on, (int __user *)arg)) != 0)
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break;
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flag = on ? FASYNC : 0;
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/* Did FASYNC state change ? */
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if ((flag ^ filp->f_flags) & FASYNC) {
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if (filp->f_op && filp->f_op->fasync) {
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lock_kernel();
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error = filp->f_op->fasync(fd, filp, on);
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unlock_kernel();
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}
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else error = -ENOTTY;
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}
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if (error != 0)
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break;
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if (on)
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filp->f_flags |= FASYNC;
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else
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filp->f_flags &= ~FASYNC;
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break;
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case FIOQSIZE:
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if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) ||
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S_ISREG(filp->f_path.dentry->d_inode->i_mode) ||
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S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) {
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loff_t res = inode_get_bytes(filp->f_path.dentry->d_inode);
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error = copy_to_user((loff_t __user *)arg, &res, sizeof(res)) ? -EFAULT : 0;
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}
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else
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/* Did FASYNC state change ? */
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if ((flag ^ filp->f_flags) & FASYNC) {
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if (filp->f_op && filp->f_op->fasync) {
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lock_kernel();
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error = filp->f_op->fasync(fd, filp, on);
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unlock_kernel();
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} else
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error = -ENOTTY;
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}
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if (error != 0)
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break;
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default:
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if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
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error = file_ioctl(filp, cmd, arg);
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else
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error = do_ioctl(filp, cmd, arg);
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break;
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if (on)
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filp->f_flags |= FASYNC;
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else
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filp->f_flags &= ~FASYNC;
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break;
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case FIOQSIZE:
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if (S_ISDIR(filp->f_path.dentry->d_inode->i_mode) ||
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S_ISREG(filp->f_path.dentry->d_inode->i_mode) ||
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S_ISLNK(filp->f_path.dentry->d_inode->i_mode)) {
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loff_t res =
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inode_get_bytes(filp->f_path.dentry->d_inode);
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error = copy_to_user((loff_t __user *)arg, &res,
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sizeof(res)) ? -EFAULT : 0;
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} else
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error = -ENOTTY;
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break;
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default:
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if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
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error = file_ioctl(filp, cmd, arg);
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else
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error = do_ioctl(filp, cmd, arg);
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break;
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}
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return error;
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}
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asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
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{
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struct file * filp;
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struct file *filp;
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int error = -EBADF;
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int fput_needed;
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