--- /dev/null
+/*
+ * linux/fs/ext4/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/fs.h>
+#include <linux/capability.h>
+#include <linux/time.h>
+#include <linux/compat.h>
+#include <linux/mount.h>
+#include <linux/file.h>
+#include <linux/random.h>
+#include <asm/uaccess.h>
+#include "ext4_jbd2.h"
+#include "ext4.h"
+
+#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)
+
+/**
+ * Swap memory between @a and @b for @len bytes.
+ *
+ * @a: pointer to first memory area
+ * @b: pointer to second memory area
+ * @len: number of bytes to swap
+ *
+ */
+static void memswap(void *a, void *b, size_t len)
+{
+ unsigned char *ap, *bp;
+ unsigned char tmp;
+
+ ap = (unsigned char *)a;
+ bp = (unsigned char *)b;
+ while (len-- > 0) {
+ tmp = *ap;
+ *ap = *bp;
+ *bp = tmp;
+ ap++;
+ bp++;
+ }
+}
+
+/**
+ * Swap i_data and associated attributes between @inode1 and @inode2.
+ * This function is used for the primary swap between inode1 and inode2
+ * and also to revert this primary swap in case of errors.
+ *
+ * Therefore you have to make sure, that calling this method twice
+ * will revert all changes.
+ *
+ * @inode1: pointer to first inode
+ * @inode2: pointer to second inode
+ */
+static void swap_inode_data(struct inode *inode1, struct inode *inode2)
+{
+ loff_t isize;
+ struct ext4_inode_info *ei1;
+ struct ext4_inode_info *ei2;
+
+ ei1 = EXT4_I(inode1);
+ ei2 = EXT4_I(inode2);
+
+ memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags));
+ memswap(&inode1->i_version, &inode2->i_version,
+ sizeof(inode1->i_version));
+ memswap(&inode1->i_blocks, &inode2->i_blocks,
+ sizeof(inode1->i_blocks));
+ memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes));
+ memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime));
+ memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime));
+
+ memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
+ memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags));
+ memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize));
+ ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
+ ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
+
+ isize = i_size_read(inode1);
+ i_size_write(inode1, i_size_read(inode2));
+ i_size_write(inode2, isize);
+}
+
+/**
+ * Swap the information from the given @inode and the inode
+ * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
+ * important fields of the inodes.
+ *
+ * @sb: the super block of the filesystem
+ * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
+ *
+ */
+static long swap_inode_boot_loader(struct super_block *sb,
+ struct inode *inode)
+{
+ handle_t *handle;
+ int err;
+ struct inode *inode_bl;
+ struct ext4_inode_info *ei_bl;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+ if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
+ return -EINVAL;
+
+ if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
+ if (IS_ERR(inode_bl))
+ return PTR_ERR(inode_bl);
+ ei_bl = EXT4_I(inode_bl);
+
+ filemap_flush(inode->i_mapping);
+ filemap_flush(inode_bl->i_mapping);
+
+ /* Protect orig inodes against a truncate and make sure,
+ * that only 1 swap_inode_boot_loader is running. */
+ lock_two_nondirectories(inode, inode_bl);
+
+ truncate_inode_pages(&inode->i_data, 0);
+ truncate_inode_pages(&inode_bl->i_data, 0);
+
+ /* Wait for all existing dio workers */
+ ext4_inode_block_unlocked_dio(inode);
+ ext4_inode_block_unlocked_dio(inode_bl);
+ inode_dio_wait(inode);
+ inode_dio_wait(inode_bl);
+
+ handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
+ if (IS_ERR(handle)) {
+ err = -EINVAL;
+ goto journal_err_out;
+ }
+
+ /* Protect extent tree against block allocations via delalloc */
+ ext4_double_down_write_data_sem(inode, inode_bl);
+
+ if (inode_bl->i_nlink == 0) {
+ /* this inode has never been used as a BOOT_LOADER */
+ set_nlink(inode_bl, 1);
+ i_uid_write(inode_bl, 0);
+ i_gid_write(inode_bl, 0);
+ inode_bl->i_flags = 0;
+ ei_bl->i_flags = 0;
+ inode_bl->i_version = 1;
+ i_size_write(inode_bl, 0);
+ inode_bl->i_mode = S_IFREG;
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+ ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS);
+ ext4_ext_tree_init(handle, inode_bl);
+ } else
+ memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
+ }
+
+ swap_inode_data(inode, inode_bl);
+
+ inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode);
+
+ spin_lock(&sbi->s_next_gen_lock);
+ inode->i_generation = sbi->s_next_generation++;
+ inode_bl->i_generation = sbi->s_next_generation++;
+ spin_unlock(&sbi->s_next_gen_lock);
+
+ ext4_discard_preallocations(inode);
+
+ err = ext4_mark_inode_dirty(handle, inode);
+ if (err < 0) {
+ ext4_warning(inode->i_sb,
+ "couldn't mark inode #%lu dirty (err %d)",
+ inode->i_ino, err);
+ /* Revert all changes: */
+ swap_inode_data(inode, inode_bl);
+ } else {
+ err = ext4_mark_inode_dirty(handle, inode_bl);
+ if (err < 0) {
+ ext4_warning(inode_bl->i_sb,
+ "couldn't mark inode #%lu dirty (err %d)",
+ inode_bl->i_ino, err);
+ /* Revert all changes: */
+ swap_inode_data(inode, inode_bl);
+ ext4_mark_inode_dirty(handle, inode);
+ }
+ }
+ ext4_journal_stop(handle);
+ ext4_double_up_write_data_sem(inode, inode_bl);
+
+journal_err_out:
+ ext4_inode_resume_unlocked_dio(inode);
+ ext4_inode_resume_unlocked_dio(inode_bl);
+ unlock_two_nondirectories(inode, inode_bl);
+ iput(inode_bl);
+ return err;
+}
+
+static int uuid_is_zero(__u8 u[16])
+{
+ int i;
+
+ for (i = 0; i < 16; i++)
+ if (u[i])
+ return 0;
+ return 1;
+}
+
+long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ struct inode *inode = file_inode(filp);
+ struct super_block *sb = inode->i_sb;
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ unsigned int flags;
+
+ ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);
+
+ switch (cmd) {
+ case EXT4_IOC_GETFLAGS:
+ ext4_get_inode_flags(ei);
+ flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
+ return put_user(flags, (int __user *) arg);
+ case EXT4_IOC_SETFLAGS: {
+ handle_t *handle = NULL;
+ int err, migrate = 0;
+ struct ext4_iloc iloc;
+ unsigned int oldflags, mask, i;
+ 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 = ext4_mask_flags(inode->i_mode, flags);
+
+ err = -EPERM;
+ mutex_lock(&inode->i_mutex);
+ /* Is it quota file? Do not allow user to mess with it */
+ if (IS_NOQUOTA(inode))
+ goto flags_out;
+
+ oldflags = ei->i_flags;
+
+ /* The JOURNAL_DATA flag is modifiable only by root */
+ jflag = flags & EXT4_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) & (EXT4_APPEND_FL | EXT4_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) & (EXT4_JOURNAL_DATA_FL)) {
+ if (!capable(CAP_SYS_RESOURCE))
+ goto flags_out;
+ }
+ if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
+ migrate = 1;
+
+ if (flags & EXT4_EOFBLOCKS_FL) {
+ /* we don't support adding EOFBLOCKS flag */
+ if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
+ err = -EOPNOTSUPP;
+ goto flags_out;
+ }
+ } else if (oldflags & EXT4_EOFBLOCKS_FL)
+ ext4_truncate(inode);
+
+ handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ goto flags_out;
+ }
+ if (IS_SYNC(inode))
+ ext4_handle_sync(handle);
+ err = ext4_reserve_inode_write(handle, inode, &iloc);
+ if (err)
+ goto flags_err;
+
+ for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
+ if (!(mask & EXT4_FL_USER_MODIFIABLE))
+ continue;
+ if (mask & flags)
+ ext4_set_inode_flag(inode, i);
+ else
+ ext4_clear_inode_flag(inode, i);
+ }
+
+ ext4_set_inode_flags(inode);
+ inode->i_ctime = ext4_current_time(inode);
+
+ err = ext4_mark_iloc_dirty(handle, inode, &iloc);
+flags_err:
+ ext4_journal_stop(handle);
+ if (err)
+ goto flags_out;
+
+ if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
+ err = ext4_change_inode_journal_flag(inode, jflag);
+ if (err)
+ goto flags_out;
+ if (migrate) {
+ if (flags & EXT4_EXTENTS_FL)
+ err = ext4_ext_migrate(inode);
+ else
+ err = ext4_ind_migrate(inode);
+ }
+
+flags_out:
+ mutex_unlock(&inode->i_mutex);
+ mnt_drop_write_file(filp);
+ return err;
+ }
+ case EXT4_IOC_GETVERSION:
+ case EXT4_IOC_GETVERSION_OLD:
+ return put_user(inode->i_generation, (int __user *) arg);
+ case EXT4_IOC_SETVERSION:
+ case EXT4_IOC_SETVERSION_OLD: {
+ handle_t *handle;
+ struct ext4_iloc iloc;
+ __u32 generation;
+ int err;
+
+ if (!inode_owner_or_capable(inode))
+ return -EPERM;
+
+ if (ext4_has_metadata_csum(inode->i_sb)) {
+ ext4_warning(sb, "Setting inode version is not "
+ "supported with metadata_csum enabled.");
+ return -ENOTTY;
+ }
+
+ 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 = ext4_journal_start(inode, EXT4_HT_INODE, 1);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ goto unlock_out;
+ }
+ err = ext4_reserve_inode_write(handle, inode, &iloc);
+ if (err == 0) {
+ inode->i_ctime = ext4_current_time(inode);
+ inode->i_generation = generation;
+ err = ext4_mark_iloc_dirty(handle, inode, &iloc);
+ }
+ ext4_journal_stop(handle);
+
+unlock_out:
+ mutex_unlock(&inode->i_mutex);
+setversion_out:
+ mnt_drop_write_file(filp);
+ return err;
+ }
+ case EXT4_IOC_GROUP_EXTEND: {
+ ext4_fsblk_t n_blocks_count;
+ int err, err2=0;
+
+ err = ext4_resize_begin(sb);
+ if (err)
+ return err;
+
+ if (get_user(n_blocks_count, (__u32 __user *)arg)) {
+ err = -EFAULT;
+ goto group_extend_out;
+ }
+
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
+ ext4_msg(sb, KERN_ERR,
+ "Online resizing not supported with bigalloc");
+ err = -EOPNOTSUPP;
+ goto group_extend_out;
+ }
+
+ err = mnt_want_write_file(filp);
+ if (err)
+ goto group_extend_out;
+
+ err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, 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);
+group_extend_out:
+ ext4_resize_end(sb);
+ return err;
+ }
+
+ case EXT4_IOC_MOVE_EXT: {
+ struct move_extent me;
+ struct fd donor;
+ int err;
+
+ if (!(filp->f_mode & FMODE_READ) ||
+ !(filp->f_mode & FMODE_WRITE))
+ return -EBADF;
+
+ if (copy_from_user(&me,
+ (struct move_extent __user *)arg, sizeof(me)))
+ return -EFAULT;
+ me.moved_len = 0;
+
+ donor = fdget(me.donor_fd);
+ if (!donor.file)
+ return -EBADF;
+
+ if (!(donor.file->f_mode & FMODE_WRITE)) {
+ err = -EBADF;
+ goto mext_out;
+ }
+
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
+ ext4_msg(sb, KERN_ERR,
+ "Online defrag not supported with bigalloc");
+ err = -EOPNOTSUPP;
+ goto mext_out;
+ }
+
+ err = mnt_want_write_file(filp);
+ if (err)
+ goto mext_out;
+
+ err = ext4_move_extents(filp, donor.file, me.orig_start,
+ me.donor_start, me.len, &me.moved_len);
+ mnt_drop_write_file(filp);
+
+ if (copy_to_user((struct move_extent __user *)arg,
+ &me, sizeof(me)))
+ err = -EFAULT;
+mext_out:
+ fdput(donor);
+ return err;
+ }
+
+ case EXT4_IOC_GROUP_ADD: {
+ struct ext4_new_group_data input;
+ int err, err2=0;
+
+ err = ext4_resize_begin(sb);
+ if (err)
+ return err;
+
+ if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
+ sizeof(input))) {
+ err = -EFAULT;
+ goto group_add_out;
+ }
+
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
+ ext4_msg(sb, KERN_ERR,
+ "Online resizing not supported with bigalloc");
+ err = -EOPNOTSUPP;
+ goto group_add_out;
+ }
+
+ err = mnt_want_write_file(filp);
+ if (err)
+ goto group_add_out;
+
+ err = ext4_group_add(sb, &input);
+ 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 && 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
Code Review / kvmfornfv.git / blobdiff