diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ext4/ioctl.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/ext4/ioctl.c | 509 |
1 files changed, 0 insertions, 509 deletions
diff --git a/ANDROID_3.4.5/fs/ext4/ioctl.c b/ANDROID_3.4.5/fs/ext4/ioctl.c deleted file mode 100644 index 1365903a..00000000 --- a/ANDROID_3.4.5/fs/ext4/ioctl.c +++ /dev/null @@ -1,509 +0,0 @@ -/* - * 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/jbd2.h> -#include <linux/capability.h> -#include <linux/time.h> -#include <linux/compat.h> -#include <linux/mount.h> -#include <linux/file.h> -#include <asm/uaccess.h> -#include "ext4_jbd2.h" -#include "ext4.h" - -#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) - -long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - struct inode *inode = filp->f_dentry->d_inode; - 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 (oldflags & EXT4_EXTENTS_FL) { - /* We don't support clearning extent flags */ - if (!(flags & EXT4_EXTENTS_FL)) { - err = -EOPNOTSUPP; - goto flags_out; - } - } else if (flags & EXT4_EXTENTS_FL) { - /* migrate the file */ - migrate = 1; - flags &= ~EXT4_EXTENTS_FL; - } - - 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, 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) - err = ext4_ext_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; - - 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, 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 file *donor_filp; - 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_filp = fget(me.donor_fd); - if (!donor_filp) - return -EBADF; - - if (!(donor_filp->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"); - return -EOPNOTSUPP; - } - - err = mnt_want_write_file(filp); - if (err) - goto mext_out; - - err = ext4_move_extents(filp, donor_filp, me.orig_start, - me.donor_start, me.len, &me.moved_len); - mnt_drop_write_file(filp); - mnt_drop_write(filp->f_path.mnt); - - if (copy_to_user((struct move_extent __user *)arg, - &me, sizeof(me))) - err = -EFAULT; -mext_out: - fput(donor_filp); - 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); -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_RESIZE_FS: { - ext4_fsblk_t n_blocks_count; - struct super_block *sb = inode->i_sb; - int err = 0, err2 = 0; - - 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 (EXT4_HAS_INCOMPAT_FEATURE(sb, - EXT4_FEATURE_INCOMPAT_META_BG)) { - ext4_msg(sb, KERN_ERR, - "Online resizing not (yet) supported with meta_bg"); - return -EOPNOTSUPP; - } - - if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, - sizeof(__u64))) { - return -EFAULT; - } - - if (n_blocks_count > MAX_32_NUM && - !EXT4_HAS_INCOMPAT_FEATURE(sb, - EXT4_FEATURE_INCOMPAT_64BIT)) { - ext4_msg(sb, KERN_ERR, - "File system only supports 32-bit block numbers"); - return -EOPNOTSUPP; - } - - err = ext4_resize_begin(sb); - if (err) - return err; - - err = mnt_want_write(filp->f_path.mnt); - 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(filp->f_path.mnt); -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 (EXT4_HAS_RO_COMPAT_FEATURE(sb, - EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { - ext4_msg(sb, KERN_ERR, - "FITRIM not supported with bigalloc"); - 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; - } - - 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: - break; - default: - return -ENOIOCTLCMD; - } - return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); -} -#endif |