+++ /dev/null
-/*
- * linux/fs/ext3/ioctl.c
- *
- * Copyright (C) 1993, 1994, 1995
- * Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
- */
-
-#include <linux/mount.h>
-#include <linux/compat.h>
-#include <asm/uaccess.h>
-#include "ext3.h"
-
-long ext3_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
- struct inode *inode = file_inode(filp);
- struct ext3_inode_info *ei = EXT3_I(inode);
- unsigned int flags;
- unsigned short rsv_window_size;
-
- ext3_debug ("cmd = %u, arg = %lu\n", cmd, arg);
-
- switch (cmd) {
- case EXT3_IOC_GETFLAGS:
- ext3_get_inode_flags(ei);
- flags = ei->i_flags & EXT3_FL_USER_VISIBLE;
- return put_user(flags, (int __user *) arg);
- case EXT3_IOC_SETFLAGS: {
- handle_t *handle = NULL;
- int err;
- struct ext3_iloc iloc;
- unsigned int oldflags;
- unsigned int jflag;
-
- if (!inode_owner_or_capable(inode))
- return -EACCES;
-
- if (get_user(flags, (int __user *) arg))
- return -EFAULT;
-
- err = mnt_want_write_file(filp);
- if (err)
- return err;
-
- flags = ext3_mask_flags(inode->i_mode, flags);
-
- mutex_lock(&inode->i_mutex);
-
- /* Is it quota file? Do not allow user to mess with it */
- err = -EPERM;
- if (IS_NOQUOTA(inode))
- goto flags_out;
-
- oldflags = ei->i_flags;
-
- /* The JOURNAL_DATA flag is modifiable only by root */
- jflag = flags & EXT3_JOURNAL_DATA_FL;
-
- /*
- * The IMMUTABLE and APPEND_ONLY flags can only be changed by
- * the relevant capability.
- *
- * This test looks nicer. Thanks to Pauline Middelink
- */
- if ((flags ^ oldflags) & (EXT3_APPEND_FL | EXT3_IMMUTABLE_FL)) {
- if (!capable(CAP_LINUX_IMMUTABLE))
- goto flags_out;
- }
-
- /*
- * The JOURNAL_DATA flag can only be changed by
- * the relevant capability.
- */
- if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL)) {
- if (!capable(CAP_SYS_RESOURCE))
- goto flags_out;
- }
-
- handle = ext3_journal_start(inode, 1);
- if (IS_ERR(handle)) {
- err = PTR_ERR(handle);
- goto flags_out;
- }
- if (IS_SYNC(inode))
- handle->h_sync = 1;
- err = ext3_reserve_inode_write(handle, inode, &iloc);
- if (err)
- goto flags_err;
-
- flags = flags & EXT3_FL_USER_MODIFIABLE;
- flags |= oldflags & ~EXT3_FL_USER_MODIFIABLE;
- ei->i_flags = flags;
-
- ext3_set_inode_flags(inode);
- inode->i_ctime = CURRENT_TIME_SEC;
-
- err = ext3_mark_iloc_dirty(handle, inode, &iloc);
-flags_err:
- ext3_journal_stop(handle);
- if (err)
- goto flags_out;
-
- if ((jflag ^ oldflags) & (EXT3_JOURNAL_DATA_FL))
- err = ext3_change_inode_journal_flag(inode, jflag);
-flags_out:
- mutex_unlock(&inode->i_mutex);
- mnt_drop_write_file(filp);
- return err;
- }
- case EXT3_IOC_GETVERSION:
- case EXT3_IOC_GETVERSION_OLD:
- return put_user(inode->i_generation, (int __user *) arg);
- case EXT3_IOC_SETVERSION:
- case EXT3_IOC_SETVERSION_OLD: {
- handle_t *handle;
- struct ext3_iloc iloc;
- __u32 generation;
- int err;
-
- if (!inode_owner_or_capable(inode))
- return -EPERM;
-
- err = mnt_want_write_file(filp);
- if (err)
- return err;
- if (get_user(generation, (int __user *) arg)) {
- err = -EFAULT;
- goto setversion_out;
- }
-
- mutex_lock(&inode->i_mutex);
- handle = ext3_journal_start(inode, 1);
- if (IS_ERR(handle)) {
- err = PTR_ERR(handle);
- goto unlock_out;
- }
- err = ext3_reserve_inode_write(handle, inode, &iloc);
- if (err == 0) {
- inode->i_ctime = CURRENT_TIME_SEC;
- inode->i_generation = generation;
- err = ext3_mark_iloc_dirty(handle, inode, &iloc);
- }
- ext3_journal_stop(handle);
-
-unlock_out:
- mutex_unlock(&inode->i_mutex);
-setversion_out:
- mnt_drop_write_file(filp);
- return err;
- }
- case EXT3_IOC_GETRSVSZ:
- if (test_opt(inode->i_sb, RESERVATION)
- && S_ISREG(inode->i_mode)
- && ei->i_block_alloc_info) {
- rsv_window_size = ei->i_block_alloc_info->rsv_window_node.rsv_goal_size;
- return put_user(rsv_window_size, (int __user *)arg);
- }
- return -ENOTTY;
- case EXT3_IOC_SETRSVSZ: {
- int err;
-
- if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
- return -ENOTTY;
-
- err = mnt_want_write_file(filp);
- if (err)
- return err;
-
- if (!inode_owner_or_capable(inode)) {
- err = -EACCES;
- goto setrsvsz_out;
- }
-
- if (get_user(rsv_window_size, (int __user *)arg)) {
- err = -EFAULT;
- goto setrsvsz_out;
- }
-
- if (rsv_window_size > EXT3_MAX_RESERVE_BLOCKS)
- rsv_window_size = EXT3_MAX_RESERVE_BLOCKS;
-
- /*
- * need to allocate reservation structure for this inode
- * before set the window size
- */
- mutex_lock(&ei->truncate_mutex);
- if (!ei->i_block_alloc_info)
- ext3_init_block_alloc_info(inode);
-
- if (ei->i_block_alloc_info){
- struct ext3_reserve_window_node *rsv = &ei->i_block_alloc_info->rsv_window_node;
- rsv->rsv_goal_size = rsv_window_size;
- }
- mutex_unlock(&ei->truncate_mutex);
-setrsvsz_out:
- mnt_drop_write_file(filp);
- return err;
- }
- case EXT3_IOC_GROUP_EXTEND: {
- ext3_fsblk_t n_blocks_count;
- struct super_block *sb = inode->i_sb;
- int err, err2;
-
- if (!capable(CAP_SYS_RESOURCE))
- return -EPERM;
-
- err = mnt_want_write_file(filp);
- if (err)
- return err;
-
- if (get_user(n_blocks_count, (__u32 __user *)arg)) {
- err = -EFAULT;
- goto group_extend_out;
- }
- err = ext3_group_extend(sb, EXT3_SB(sb)->s_es, n_blocks_count);
- journal_lock_updates(EXT3_SB(sb)->s_journal);
- err2 = journal_flush(EXT3_SB(sb)->s_journal);
- journal_unlock_updates(EXT3_SB(sb)->s_journal);
- if (err == 0)
- err = err2;
-group_extend_out:
- mnt_drop_write_file(filp);
- return err;
- }
- case EXT3_IOC_GROUP_ADD: {
- struct ext3_new_group_data input;
- struct super_block *sb = inode->i_sb;
- int err, err2;
-
- if (!capable(CAP_SYS_RESOURCE))
- return -EPERM;
-
- err = mnt_want_write_file(filp);
- if (err)
- return err;
-
- if (copy_from_user(&input, (struct ext3_new_group_input __user *)arg,
- sizeof(input))) {
- err = -EFAULT;
- goto group_add_out;
- }
-
- err = ext3_group_add(sb, &input);
- journal_lock_updates(EXT3_SB(sb)->s_journal);
- err2 = journal_flush(EXT3_SB(sb)->s_journal);
- journal_unlock_updates(EXT3_SB(sb)->s_journal);
- if (err == 0)
- err = err2;
-group_add_out:
- mnt_drop_write_file(filp);
- return err;
- }
- case FITRIM: {
-
- struct super_block *sb = inode->i_sb;
- struct fstrim_range range;
- int ret = 0;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (copy_from_user(&range, (struct fstrim_range __user *)arg,
- sizeof(range)))
- return -EFAULT;
-
- ret = ext3_trim_fs(sb, &range);
- if (ret < 0)
- return ret;
-
- if (copy_to_user((struct fstrim_range __user *)arg, &range,
- sizeof(range)))
- return -EFAULT;
-
- return 0;
- }
-
- default:
- return -ENOTTY;
- }
-}
-
-#ifdef CONFIG_COMPAT
-long ext3_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- /* These are just misnamed, they actually get/put from/to user an int */
- switch (cmd) {
- case EXT3_IOC32_GETFLAGS:
- cmd = EXT3_IOC_GETFLAGS;
- break;
- case EXT3_IOC32_SETFLAGS:
- cmd = EXT3_IOC_SETFLAGS;
- break;
- case EXT3_IOC32_GETVERSION:
- cmd = EXT3_IOC_GETVERSION;
- break;
- case EXT3_IOC32_SETVERSION:
- cmd = EXT3_IOC_SETVERSION;
- break;
- case EXT3_IOC32_GROUP_EXTEND:
- cmd = EXT3_IOC_GROUP_EXTEND;
- break;
- case EXT3_IOC32_GETVERSION_OLD:
- cmd = EXT3_IOC_GETVERSION_OLD;
- break;
- case EXT3_IOC32_SETVERSION_OLD:
- cmd = EXT3_IOC_SETVERSION_OLD;
- break;
-#ifdef CONFIG_JBD_DEBUG
- case EXT3_IOC32_WAIT_FOR_READONLY:
- cmd = EXT3_IOC_WAIT_FOR_READONLY;
- break;
-#endif
- case EXT3_IOC32_GETRSVSZ:
- cmd = EXT3_IOC_GETRSVSZ;
- break;
- case EXT3_IOC32_SETRSVSZ:
- cmd = EXT3_IOC_SETRSVSZ;
- break;
- case EXT3_IOC_GROUP_ADD:
- break;
- default:
- return -ENOIOCTLCMD;
- }
- return ext3_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
-}
-#endif
Code Review / kvmfornfv.git / blobdiff