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![Michael Halcrow](/assets/img/avatar_default.png)
Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Ildar Muslukhov <muslukhovi@gmail.com>
773 lines
19 KiB
C
773 lines
19 KiB
C
/*
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* linux/fs/ext4/ioctl.c
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*
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* Copyright (C) 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*/
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#include <linux/fs.h>
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#include <linux/capability.h>
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#include <linux/time.h>
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#include <linux/compat.h>
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#include <linux/mount.h>
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#include <linux/file.h>
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#include <linux/random.h>
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#include <asm/uaccess.h>
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#include "ext4_jbd2.h"
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#include "ext4.h"
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#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)
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/**
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* Swap memory between @a and @b for @len bytes.
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*
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* @a: pointer to first memory area
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* @b: pointer to second memory area
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* @len: number of bytes to swap
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*
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*/
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static void memswap(void *a, void *b, size_t len)
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{
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unsigned char *ap, *bp;
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unsigned char tmp;
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ap = (unsigned char *)a;
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bp = (unsigned char *)b;
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while (len-- > 0) {
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tmp = *ap;
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*ap = *bp;
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*bp = tmp;
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ap++;
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bp++;
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}
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}
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/**
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* Swap i_data and associated attributes between @inode1 and @inode2.
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* This function is used for the primary swap between inode1 and inode2
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* and also to revert this primary swap in case of errors.
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*
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* Therefore you have to make sure, that calling this method twice
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* will revert all changes.
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*
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* @inode1: pointer to first inode
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* @inode2: pointer to second inode
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*/
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static void swap_inode_data(struct inode *inode1, struct inode *inode2)
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{
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loff_t isize;
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struct ext4_inode_info *ei1;
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struct ext4_inode_info *ei2;
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ei1 = EXT4_I(inode1);
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ei2 = EXT4_I(inode2);
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memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags));
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memswap(&inode1->i_version, &inode2->i_version,
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sizeof(inode1->i_version));
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memswap(&inode1->i_blocks, &inode2->i_blocks,
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sizeof(inode1->i_blocks));
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memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes));
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memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime));
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memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime));
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memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
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memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags));
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memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize));
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ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
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ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
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isize = i_size_read(inode1);
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i_size_write(inode1, i_size_read(inode2));
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i_size_write(inode2, isize);
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}
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/**
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* Swap the information from the given @inode and the inode
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* EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
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* important fields of the inodes.
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*
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* @sb: the super block of the filesystem
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* @inode: the inode to swap with EXT4_BOOT_LOADER_INO
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*
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*/
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static long swap_inode_boot_loader(struct super_block *sb,
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struct inode *inode)
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{
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handle_t *handle;
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int err;
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struct inode *inode_bl;
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struct ext4_inode_info *ei_bl;
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struct ext4_sb_info *sbi = EXT4_SB(sb);
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if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
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return -EINVAL;
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if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
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return -EPERM;
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inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
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if (IS_ERR(inode_bl))
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return PTR_ERR(inode_bl);
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ei_bl = EXT4_I(inode_bl);
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filemap_flush(inode->i_mapping);
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filemap_flush(inode_bl->i_mapping);
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/* Protect orig inodes against a truncate and make sure,
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* that only 1 swap_inode_boot_loader is running. */
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lock_two_nondirectories(inode, inode_bl);
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truncate_inode_pages(&inode->i_data, 0);
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truncate_inode_pages(&inode_bl->i_data, 0);
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/* Wait for all existing dio workers */
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ext4_inode_block_unlocked_dio(inode);
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ext4_inode_block_unlocked_dio(inode_bl);
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inode_dio_wait(inode);
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inode_dio_wait(inode_bl);
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handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
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if (IS_ERR(handle)) {
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err = -EINVAL;
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goto journal_err_out;
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}
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/* Protect extent tree against block allocations via delalloc */
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ext4_double_down_write_data_sem(inode, inode_bl);
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if (inode_bl->i_nlink == 0) {
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/* this inode has never been used as a BOOT_LOADER */
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set_nlink(inode_bl, 1);
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i_uid_write(inode_bl, 0);
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i_gid_write(inode_bl, 0);
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inode_bl->i_flags = 0;
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ei_bl->i_flags = 0;
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inode_bl->i_version = 1;
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i_size_write(inode_bl, 0);
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inode_bl->i_mode = S_IFREG;
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if (EXT4_HAS_INCOMPAT_FEATURE(sb,
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EXT4_FEATURE_INCOMPAT_EXTENTS)) {
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ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
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ext4_ext_tree_init(handle, inode_bl);
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} else
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memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
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}
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swap_inode_data(inode, inode_bl);
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inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode);
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spin_lock(&sbi->s_next_gen_lock);
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inode->i_generation = sbi->s_next_generation++;
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inode_bl->i_generation = sbi->s_next_generation++;
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spin_unlock(&sbi->s_next_gen_lock);
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ext4_discard_preallocations(inode);
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err = ext4_mark_inode_dirty(handle, inode);
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if (err < 0) {
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ext4_warning(inode->i_sb,
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"couldn't mark inode #%lu dirty (err %d)",
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inode->i_ino, err);
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/* Revert all changes: */
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swap_inode_data(inode, inode_bl);
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} else {
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err = ext4_mark_inode_dirty(handle, inode_bl);
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if (err < 0) {
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ext4_warning(inode_bl->i_sb,
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"couldn't mark inode #%lu dirty (err %d)",
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inode_bl->i_ino, err);
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/* Revert all changes: */
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swap_inode_data(inode, inode_bl);
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ext4_mark_inode_dirty(handle, inode);
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}
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}
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ext4_journal_stop(handle);
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ext4_double_up_write_data_sem(inode, inode_bl);
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journal_err_out:
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ext4_inode_resume_unlocked_dio(inode);
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ext4_inode_resume_unlocked_dio(inode_bl);
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unlock_two_nondirectories(inode, inode_bl);
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iput(inode_bl);
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return err;
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}
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static int uuid_is_zero(__u8 u[16])
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{
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int i;
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for (i = 0; i < 16; i++)
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if (u[i])
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return 0;
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return 1;
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}
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long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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struct inode *inode = file_inode(filp);
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struct super_block *sb = inode->i_sb;
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struct ext4_inode_info *ei = EXT4_I(inode);
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unsigned int flags;
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ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
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switch (cmd) {
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case EXT4_IOC_GETFLAGS:
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ext4_get_inode_flags(ei);
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flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
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return put_user(flags, (int __user *) arg);
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case EXT4_IOC_SETFLAGS: {
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handle_t *handle = NULL;
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int err, migrate = 0;
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struct ext4_iloc iloc;
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unsigned int oldflags, mask, i;
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unsigned int jflag;
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if (!inode_owner_or_capable(inode))
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return -EACCES;
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if (get_user(flags, (int __user *) arg))
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return -EFAULT;
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err = mnt_want_write_file(filp);
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if (err)
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return err;
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flags = ext4_mask_flags(inode->i_mode, flags);
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err = -EPERM;
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mutex_lock(&inode->i_mutex);
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/* Is it quota file? Do not allow user to mess with it */
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if (IS_NOQUOTA(inode))
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goto flags_out;
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oldflags = ei->i_flags;
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/* The JOURNAL_DATA flag is modifiable only by root */
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jflag = flags & EXT4_JOURNAL_DATA_FL;
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/*
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* The IMMUTABLE and APPEND_ONLY flags can only be changed by
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* the relevant capability.
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*
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* This test looks nicer. Thanks to Pauline Middelink
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*/
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if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
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if (!capable(CAP_LINUX_IMMUTABLE))
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goto flags_out;
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}
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/*
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* The JOURNAL_DATA flag can only be changed by
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* the relevant capability.
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*/
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if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
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if (!capable(CAP_SYS_RESOURCE))
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goto flags_out;
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}
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if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
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migrate = 1;
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if (flags & EXT4_EOFBLOCKS_FL) {
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/* we don't support adding EOFBLOCKS flag */
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if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
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err = -EOPNOTSUPP;
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goto flags_out;
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}
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} else if (oldflags & EXT4_EOFBLOCKS_FL)
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ext4_truncate(inode);
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handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
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if (IS_ERR(handle)) {
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err = PTR_ERR(handle);
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goto flags_out;
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}
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if (IS_SYNC(inode))
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ext4_handle_sync(handle);
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err = ext4_reserve_inode_write(handle, inode, &iloc);
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if (err)
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goto flags_err;
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for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
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if (!(mask & EXT4_FL_USER_MODIFIABLE))
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continue;
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if (mask & flags)
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ext4_set_inode_flag(inode, i);
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else
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ext4_clear_inode_flag(inode, i);
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}
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ext4_set_inode_flags(inode);
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inode->i_ctime = ext4_current_time(inode);
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err = ext4_mark_iloc_dirty(handle, inode, &iloc);
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flags_err:
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ext4_journal_stop(handle);
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if (err)
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goto flags_out;
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if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
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err = ext4_change_inode_journal_flag(inode, jflag);
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if (err)
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goto flags_out;
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if (migrate) {
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if (flags & EXT4_EXTENTS_FL)
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err = ext4_ext_migrate(inode);
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else
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err = ext4_ind_migrate(inode);
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}
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flags_out:
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mutex_unlock(&inode->i_mutex);
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mnt_drop_write_file(filp);
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return err;
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}
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case EXT4_IOC_GETVERSION:
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case EXT4_IOC_GETVERSION_OLD:
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return put_user(inode->i_generation, (int __user *) arg);
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case EXT4_IOC_SETVERSION:
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case EXT4_IOC_SETVERSION_OLD: {
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handle_t *handle;
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struct ext4_iloc iloc;
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__u32 generation;
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int err;
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if (!inode_owner_or_capable(inode))
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return -EPERM;
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if (ext4_has_metadata_csum(inode->i_sb)) {
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ext4_warning(sb, "Setting inode version is not "
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"supported with metadata_csum enabled.");
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return -ENOTTY;
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}
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err = mnt_want_write_file(filp);
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if (err)
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return err;
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if (get_user(generation, (int __user *) arg)) {
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err = -EFAULT;
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goto setversion_out;
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}
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mutex_lock(&inode->i_mutex);
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handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
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if (IS_ERR(handle)) {
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err = PTR_ERR(handle);
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goto unlock_out;
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}
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err = ext4_reserve_inode_write(handle, inode, &iloc);
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if (err == 0) {
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inode->i_ctime = ext4_current_time(inode);
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inode->i_generation = generation;
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err = ext4_mark_iloc_dirty(handle, inode, &iloc);
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}
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ext4_journal_stop(handle);
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unlock_out:
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mutex_unlock(&inode->i_mutex);
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setversion_out:
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mnt_drop_write_file(filp);
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return err;
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}
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case EXT4_IOC_GROUP_EXTEND: {
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ext4_fsblk_t n_blocks_count;
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int err, err2=0;
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err = ext4_resize_begin(sb);
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if (err)
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return err;
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if (get_user(n_blocks_count, (__u32 __user *)arg)) {
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err = -EFAULT;
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goto group_extend_out;
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}
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if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
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EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
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ext4_msg(sb, KERN_ERR,
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"Online resizing not supported with bigalloc");
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err = -EOPNOTSUPP;
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goto group_extend_out;
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}
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err = mnt_want_write_file(filp);
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if (err)
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goto group_extend_out;
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err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
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if (EXT4_SB(sb)->s_journal) {
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jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
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err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
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jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
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}
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if (err == 0)
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err = err2;
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mnt_drop_write_file(filp);
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group_extend_out:
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ext4_resize_end(sb);
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return err;
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}
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case EXT4_IOC_MOVE_EXT: {
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struct move_extent me;
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struct fd donor;
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int err;
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if (!(filp->f_mode & FMODE_READ) ||
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!(filp->f_mode & FMODE_WRITE))
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return -EBADF;
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if (copy_from_user(&me,
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(struct move_extent __user *)arg, sizeof(me)))
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return -EFAULT;
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me.moved_len = 0;
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donor = fdget(me.donor_fd);
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if (!donor.file)
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return -EBADF;
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if (!(donor.file->f_mode & FMODE_WRITE)) {
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err = -EBADF;
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goto mext_out;
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}
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if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
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EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
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ext4_msg(sb, KERN_ERR,
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"Online defrag not supported with bigalloc");
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err = -EOPNOTSUPP;
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goto mext_out;
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}
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err = mnt_want_write_file(filp);
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if (err)
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goto mext_out;
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err = ext4_move_extents(filp, donor.file, me.orig_start,
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me.donor_start, me.len, &me.moved_len);
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mnt_drop_write_file(filp);
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if (copy_to_user((struct move_extent __user *)arg,
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&me, sizeof(me)))
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err = -EFAULT;
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mext_out:
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fdput(donor);
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return err;
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}
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case EXT4_IOC_GROUP_ADD: {
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struct ext4_new_group_data input;
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int err, err2=0;
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err = ext4_resize_begin(sb);
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if (err)
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return err;
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if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
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sizeof(input))) {
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err = -EFAULT;
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goto group_add_out;
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}
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if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
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EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
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ext4_msg(sb, KERN_ERR,
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"Online resizing not supported with bigalloc");
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err = -EOPNOTSUPP;
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goto group_add_out;
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}
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err = mnt_want_write_file(filp);
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if (err)
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goto group_add_out;
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err = ext4_group_add(sb, &input);
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if (EXT4_SB(sb)->s_journal) {
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jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
|
|
err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
|
|
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
|
|
}
|
|
if (err == 0)
|
|
err = err2;
|
|
mnt_drop_write_file(filp);
|
|
if (!err && ext4_has_group_desc_csum(sb) &&
|
|
test_opt(sb, INIT_INODE_TABLE))
|
|
err = ext4_register_li_request(sb, input.group);
|
|
group_add_out:
|
|
ext4_resize_end(sb);
|
|
return err;
|
|
}
|
|
|
|
case EXT4_IOC_MIGRATE:
|
|
{
|
|
int err;
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
/*
|
|
* inode_mutex prevent write and truncate on the file.
|
|
* Read still goes through. We take i_data_sem in
|
|
* ext4_ext_swap_inode_data before we switch the
|
|
* inode format to prevent read.
|
|
*/
|
|
mutex_lock(&(inode->i_mutex));
|
|
err = ext4_ext_migrate(inode);
|
|
mutex_unlock(&(inode->i_mutex));
|
|
mnt_drop_write_file(filp);
|
|
return err;
|
|
}
|
|
|
|
case EXT4_IOC_ALLOC_DA_BLKS:
|
|
{
|
|
int err;
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
err = ext4_alloc_da_blocks(inode);
|
|
mnt_drop_write_file(filp);
|
|
return err;
|
|
}
|
|
|
|
case EXT4_IOC_SWAP_BOOT:
|
|
{
|
|
int err;
|
|
if (!(filp->f_mode & FMODE_WRITE))
|
|
return -EBADF;
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
err = swap_inode_boot_loader(sb, inode);
|
|
mnt_drop_write_file(filp);
|
|
return err;
|
|
}
|
|
|
|
case EXT4_IOC_RESIZE_FS: {
|
|
ext4_fsblk_t n_blocks_count;
|
|
int err = 0, err2 = 0;
|
|
ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
|
|
|
|
if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
|
|
EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Online resizing not (yet) supported with bigalloc");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
|
|
sizeof(__u64))) {
|
|
return -EFAULT;
|
|
}
|
|
|
|
err = ext4_resize_begin(sb);
|
|
if (err)
|
|
return err;
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
goto resizefs_out;
|
|
|
|
err = ext4_resize_fs(sb, n_blocks_count);
|
|
if (EXT4_SB(sb)->s_journal) {
|
|
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
|
|
err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
|
|
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
|
|
}
|
|
if (err == 0)
|
|
err = err2;
|
|
mnt_drop_write_file(filp);
|
|
if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
|
|
ext4_has_group_desc_csum(sb) &&
|
|
test_opt(sb, INIT_INODE_TABLE))
|
|
err = ext4_register_li_request(sb, o_group);
|
|
|
|
resizefs_out:
|
|
ext4_resize_end(sb);
|
|
return err;
|
|
}
|
|
|
|
case FITRIM:
|
|
{
|
|
struct request_queue *q = bdev_get_queue(sb->s_bdev);
|
|
struct fstrim_range range;
|
|
int ret = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (!blk_queue_discard(q))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
range.minlen = max((unsigned int)range.minlen,
|
|
q->limits.discard_granularity);
|
|
ret = ext4_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;
|
|
}
|
|
case EXT4_IOC_PRECACHE_EXTENTS:
|
|
return ext4_ext_precache(inode);
|
|
case EXT4_IOC_SET_ENCRYPTION_POLICY: {
|
|
#ifdef CONFIG_EXT4_FS_ENCRYPTION
|
|
struct ext4_encryption_policy policy;
|
|
int err = 0;
|
|
|
|
if (copy_from_user(&policy,
|
|
(struct ext4_encryption_policy __user *)arg,
|
|
sizeof(policy))) {
|
|
err = -EFAULT;
|
|
goto encryption_policy_out;
|
|
}
|
|
|
|
err = ext4_process_policy(&policy, inode);
|
|
encryption_policy_out:
|
|
return err;
|
|
#else
|
|
return -EOPNOTSUPP;
|
|
#endif
|
|
}
|
|
case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
|
|
int err, err2;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
handle_t *handle;
|
|
|
|
if (!ext4_sb_has_crypto(sb))
|
|
return -EOPNOTSUPP;
|
|
if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
|
|
if (IS_ERR(handle)) {
|
|
err = PTR_ERR(handle);
|
|
goto pwsalt_err_exit;
|
|
}
|
|
err = ext4_journal_get_write_access(handle, sbi->s_sbh);
|
|
if (err)
|
|
goto pwsalt_err_journal;
|
|
generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
|
|
err = ext4_handle_dirty_metadata(handle, NULL,
|
|
sbi->s_sbh);
|
|
pwsalt_err_journal:
|
|
err2 = ext4_journal_stop(handle);
|
|
if (err2 && !err)
|
|
err = err2;
|
|
pwsalt_err_exit:
|
|
mnt_drop_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (copy_to_user((void *) arg, sbi->s_es->s_encrypt_pw_salt,
|
|
16))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case EXT4_IOC_GET_ENCRYPTION_POLICY: {
|
|
#ifdef CONFIG_EXT4_FS_ENCRYPTION
|
|
struct ext4_encryption_policy policy;
|
|
int err = 0;
|
|
|
|
if (!ext4_encrypted_inode(inode))
|
|
return -ENOENT;
|
|
err = ext4_get_policy(inode, &policy);
|
|
if (err)
|
|
return err;
|
|
if (copy_to_user((void *)arg, &policy, sizeof(policy)))
|
|
return -EFAULT;
|
|
return 0;
|
|
#else
|
|
return -EOPNOTSUPP;
|
|
#endif
|
|
}
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
long ext4_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 EXT4_IOC32_GETFLAGS:
|
|
cmd = EXT4_IOC_GETFLAGS;
|
|
break;
|
|
case EXT4_IOC32_SETFLAGS:
|
|
cmd = EXT4_IOC_SETFLAGS;
|
|
break;
|
|
case EXT4_IOC32_GETVERSION:
|
|
cmd = EXT4_IOC_GETVERSION;
|
|
break;
|
|
case EXT4_IOC32_SETVERSION:
|
|
cmd = EXT4_IOC_SETVERSION;
|
|
break;
|
|
case EXT4_IOC32_GROUP_EXTEND:
|
|
cmd = EXT4_IOC_GROUP_EXTEND;
|
|
break;
|
|
case EXT4_IOC32_GETVERSION_OLD:
|
|
cmd = EXT4_IOC_GETVERSION_OLD;
|
|
break;
|
|
case EXT4_IOC32_SETVERSION_OLD:
|
|
cmd = EXT4_IOC_SETVERSION_OLD;
|
|
break;
|
|
case EXT4_IOC32_GETRSVSZ:
|
|
cmd = EXT4_IOC_GETRSVSZ;
|
|
break;
|
|
case EXT4_IOC32_SETRSVSZ:
|
|
cmd = EXT4_IOC_SETRSVSZ;
|
|
break;
|
|
case EXT4_IOC32_GROUP_ADD: {
|
|
struct compat_ext4_new_group_input __user *uinput;
|
|
struct ext4_new_group_input input;
|
|
mm_segment_t old_fs;
|
|
int err;
|
|
|
|
uinput = compat_ptr(arg);
|
|
err = get_user(input.group, &uinput->group);
|
|
err |= get_user(input.block_bitmap, &uinput->block_bitmap);
|
|
err |= get_user(input.inode_bitmap, &uinput->inode_bitmap);
|
|
err |= get_user(input.inode_table, &uinput->inode_table);
|
|
err |= get_user(input.blocks_count, &uinput->blocks_count);
|
|
err |= get_user(input.reserved_blocks,
|
|
&uinput->reserved_blocks);
|
|
if (err)
|
|
return -EFAULT;
|
|
old_fs = get_fs();
|
|
set_fs(KERNEL_DS);
|
|
err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
|
|
(unsigned long) &input);
|
|
set_fs(old_fs);
|
|
return err;
|
|
}
|
|
case EXT4_IOC_MOVE_EXT:
|
|
case FITRIM:
|
|
case EXT4_IOC_RESIZE_FS:
|
|
case EXT4_IOC_PRECACHE_EXTENTS:
|
|
case EXT4_IOC_SET_ENCRYPTION_POLICY:
|
|
case EXT4_IOC_GET_ENCRYPTION_PWSALT:
|
|
case EXT4_IOC_GET_ENCRYPTION_POLICY:
|
|
break;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
|
|
}
|
|
#endif
|