![Linus Torvalds](/assets/img/avatar_default.png)
users to more easily find the jbd2 journal thread for a particular ext4 file system. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEK2m5VNv+CHkogTfJ8vlZVpUNgaMFAlx8utQACgkQ8vlZVpUN gaOMOQf+Olp6hTbCuPJNill7npEejkPu9VhNvLPp3dLPBfsyqG9IOZmUaKKtr3LS ZYYzMMoIlbHDsWM70O92zDS3s1ThKRFoDdcw4YKXkn1Awlqc4LRZ/NnzyIIdA3mK rhOvcr6ttWk2B2S67nGceTH08SX5zACMtMiQijP58+GCp4Xe+PdqPRRjYYJSOZMv xCS43LoWY0tkeBTQuk9WYTi6G/E1X/aiq06pYiQzP69PotN6/cFSdNgP1r+7dYiS V4IXPqEqFt8NvUZb1bJchT3+2zM3Xi/+n//7yLkpY7OhX6p1p24oB7abMstp3ssU BlF8KP4elQcI892QX2Hf+0r4tBu+0w== =2yLu -----END PGP SIGNATURE----- Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: "A large number of bug fixes and cleanups. One new feature to allow users to more easily find the jbd2 journal thread for a particular ext4 file system" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (25 commits) jbd2: jbd2_get_transaction does not need to return a value jbd2: fix invalid descriptor block checksum ext4: fix bigalloc cluster freeing when hole punching under load ext4: add sysfs attr /sys/fs/ext4/<disk>/journal_task ext4: Change debugging support help prefix from EXT4 to Ext4 ext4: fix compile error when using BUFFER_TRACE jbd2: fix compile warning when using JBUFFER_TRACE ext4: fix some error pointer dereferences ext4: annotate more implicit fall throughs ext4: annotate implicit fall throughs ext4: don't update s_rev_level if not required jbd2: fold jbd2_superblock_csum_{verify,set} into their callers jbd2: fix race when writing superblock ext4: fix crash during online resizing ext4: disallow files with EXT4_JOURNAL_DATA_FL from EXT4_IOC_SWAP_BOOT ext4: add mask of ext4 flags to swap ext4: update quota information while swapping boot loader inode ext4: cleanup pagecache before swap i_data ext4: fix check of inode in swap_inode_boot_loader ext4: unlock unused_pages timely when doing writeback ...
1197 lines
29 KiB
C
1197 lines
29 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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/quotaops.h>
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#include <linux/random.h>
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#include <linux/uuid.h>
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#include <linux/uaccess.h>
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#include <linux/delay.h>
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#include <linux/iversion.h>
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#include "ext4_jbd2.h"
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#include "ext4.h"
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#include <linux/fsmap.h>
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#include "fsmap.h"
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#include <trace/events/ext4.h>
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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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ap = (unsigned char *)a;
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bp = (unsigned char *)b;
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while (len-- > 0) {
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swap(*ap, *bp);
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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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unsigned long tmp;
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ei1 = EXT4_I(inode1);
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ei2 = EXT4_I(inode2);
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swap(inode1->i_version, inode2->i_version);
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swap(inode1->i_atime, inode2->i_atime);
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swap(inode1->i_mtime, inode2->i_mtime);
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memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
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tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
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ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
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(ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
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ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
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swap(ei1->i_disksize, ei2->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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static void reset_inode_seed(struct inode *inode)
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{
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struct ext4_inode_info *ei = EXT4_I(inode);
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struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
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__le32 inum = cpu_to_le32(inode->i_ino);
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__le32 gen = cpu_to_le32(inode->i_generation);
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__u32 csum;
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if (!ext4_has_metadata_csum(inode->i_sb))
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return;
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csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
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ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
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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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qsize_t size, size_bl, diff;
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blkcnt_t blocks;
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unsigned short bytes;
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inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
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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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/* 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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if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
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IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
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(EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
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ext4_has_inline_data(inode)) {
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err = -EINVAL;
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goto journal_err_out;
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}
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if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
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!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
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err = -EPERM;
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goto journal_err_out;
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}
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down_write(&EXT4_I(inode)->i_mmap_sem);
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err = filemap_write_and_wait(inode->i_mapping);
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if (err)
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goto err_out;
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err = filemap_write_and_wait(inode_bl->i_mapping);
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if (err)
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goto err_out;
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/* Wait for all existing dio workers */
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inode_dio_wait(inode);
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inode_dio_wait(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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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 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_set_iversion(inode_bl, 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_feature_extents(sb)) {
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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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err = dquot_initialize(inode);
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if (err)
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goto err_out1;
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size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
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size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
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diff = size - size_bl;
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swap_inode_data(inode, inode_bl);
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inode->i_ctime = inode_bl->i_ctime = current_time(inode);
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inode->i_generation = prandom_u32();
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inode_bl->i_generation = prandom_u32();
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reset_inode_seed(inode);
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reset_inode_seed(inode_bl);
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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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/* No need to update quota information. */
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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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ext4_mark_inode_dirty(handle, inode);
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goto err_out1;
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}
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blocks = inode_bl->i_blocks;
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bytes = inode_bl->i_bytes;
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inode_bl->i_blocks = inode->i_blocks;
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inode_bl->i_bytes = inode->i_bytes;
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err = ext4_mark_inode_dirty(handle, inode_bl);
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if (err < 0) {
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/* No need to update quota information. */
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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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goto revert;
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}
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/* Bootloader inode should not be counted into quota information. */
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if (diff > 0)
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dquot_free_space(inode, diff);
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else
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err = dquot_alloc_space(inode, -1 * diff);
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if (err < 0) {
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revert:
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/* Revert all changes: */
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inode_bl->i_blocks = blocks;
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inode_bl->i_bytes = bytes;
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swap_inode_data(inode, inode_bl);
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ext4_mark_inode_dirty(handle, inode);
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ext4_mark_inode_dirty(handle, inode_bl);
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}
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err_out1:
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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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err_out:
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up_write(&EXT4_I(inode)->i_mmap_sem);
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journal_err_out:
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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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#ifdef CONFIG_FS_ENCRYPTION
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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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#endif
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static int ext4_ioctl_setflags(struct inode *inode,
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unsigned int flags)
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{
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struct ext4_inode_info *ei = EXT4_I(inode);
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handle_t *handle = NULL;
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int err = -EPERM, 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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/* Is it quota file? Do not allow user to mess with it */
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if (ext4_is_quota_file(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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err = ext4_truncate(inode);
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if (err)
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goto flags_out;
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}
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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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/* These flags get special treatment later */
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if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
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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 = current_time(inode);
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|
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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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|
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if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
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/*
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* Changes to the journaling mode can cause unsafe changes to
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* S_DAX if we are using the DAX mount option.
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*/
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if (test_opt(inode->i_sb, DAX)) {
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err = -EBUSY;
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goto flags_out;
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}
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|
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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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}
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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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|
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flags_out:
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return err;
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}
|
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|
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#ifdef CONFIG_QUOTA
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static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
|
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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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int err, rc;
|
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handle_t *handle;
|
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kprojid_t kprojid;
|
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struct ext4_iloc iloc;
|
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struct ext4_inode *raw_inode;
|
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struct dquot *transfer_to[MAXQUOTAS] = { };
|
|
|
|
if (!ext4_has_feature_project(sb)) {
|
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if (projid != EXT4_DEF_PROJID)
|
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return -EOPNOTSUPP;
|
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else
|
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return 0;
|
|
}
|
|
|
|
if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE)
|
|
return -EOPNOTSUPP;
|
|
|
|
kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
|
|
|
|
if (projid_eq(kprojid, EXT4_I(inode)->i_projid))
|
|
return 0;
|
|
|
|
err = -EPERM;
|
|
/* Is it quota file? Do not allow user to mess with it */
|
|
if (ext4_is_quota_file(inode))
|
|
return err;
|
|
|
|
err = ext4_get_inode_loc(inode, &iloc);
|
|
if (err)
|
|
return err;
|
|
|
|
raw_inode = ext4_raw_inode(&iloc);
|
|
if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) {
|
|
err = ext4_expand_extra_isize(inode,
|
|
EXT4_SB(sb)->s_want_extra_isize,
|
|
&iloc);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
brelse(iloc.bh);
|
|
}
|
|
|
|
err = dquot_initialize(inode);
|
|
if (err)
|
|
return err;
|
|
|
|
handle = ext4_journal_start(inode, EXT4_HT_QUOTA,
|
|
EXT4_QUOTA_INIT_BLOCKS(sb) +
|
|
EXT4_QUOTA_DEL_BLOCKS(sb) + 3);
|
|
if (IS_ERR(handle))
|
|
return PTR_ERR(handle);
|
|
|
|
err = ext4_reserve_inode_write(handle, inode, &iloc);
|
|
if (err)
|
|
goto out_stop;
|
|
|
|
transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
|
|
if (!IS_ERR(transfer_to[PRJQUOTA])) {
|
|
|
|
/* __dquot_transfer() calls back ext4_get_inode_usage() which
|
|
* counts xattr inode references.
|
|
*/
|
|
down_read(&EXT4_I(inode)->xattr_sem);
|
|
err = __dquot_transfer(inode, transfer_to);
|
|
up_read(&EXT4_I(inode)->xattr_sem);
|
|
dqput(transfer_to[PRJQUOTA]);
|
|
if (err)
|
|
goto out_dirty;
|
|
}
|
|
|
|
EXT4_I(inode)->i_projid = kprojid;
|
|
inode->i_ctime = current_time(inode);
|
|
out_dirty:
|
|
rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
|
|
if (!err)
|
|
err = rc;
|
|
out_stop:
|
|
ext4_journal_stop(handle);
|
|
return err;
|
|
}
|
|
#else
|
|
static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
|
|
{
|
|
if (projid != EXT4_DEF_PROJID)
|
|
return -EOPNOTSUPP;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* Transfer internal flags to xflags */
|
|
static inline __u32 ext4_iflags_to_xflags(unsigned long iflags)
|
|
{
|
|
__u32 xflags = 0;
|
|
|
|
if (iflags & EXT4_SYNC_FL)
|
|
xflags |= FS_XFLAG_SYNC;
|
|
if (iflags & EXT4_IMMUTABLE_FL)
|
|
xflags |= FS_XFLAG_IMMUTABLE;
|
|
if (iflags & EXT4_APPEND_FL)
|
|
xflags |= FS_XFLAG_APPEND;
|
|
if (iflags & EXT4_NODUMP_FL)
|
|
xflags |= FS_XFLAG_NODUMP;
|
|
if (iflags & EXT4_NOATIME_FL)
|
|
xflags |= FS_XFLAG_NOATIME;
|
|
if (iflags & EXT4_PROJINHERIT_FL)
|
|
xflags |= FS_XFLAG_PROJINHERIT;
|
|
return xflags;
|
|
}
|
|
|
|
#define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
|
|
FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
|
|
FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
|
|
|
|
/* Transfer xflags flags to internal */
|
|
static inline unsigned long ext4_xflags_to_iflags(__u32 xflags)
|
|
{
|
|
unsigned long iflags = 0;
|
|
|
|
if (xflags & FS_XFLAG_SYNC)
|
|
iflags |= EXT4_SYNC_FL;
|
|
if (xflags & FS_XFLAG_IMMUTABLE)
|
|
iflags |= EXT4_IMMUTABLE_FL;
|
|
if (xflags & FS_XFLAG_APPEND)
|
|
iflags |= EXT4_APPEND_FL;
|
|
if (xflags & FS_XFLAG_NODUMP)
|
|
iflags |= EXT4_NODUMP_FL;
|
|
if (xflags & FS_XFLAG_NOATIME)
|
|
iflags |= EXT4_NOATIME_FL;
|
|
if (xflags & FS_XFLAG_PROJINHERIT)
|
|
iflags |= EXT4_PROJINHERIT_FL;
|
|
|
|
return iflags;
|
|
}
|
|
|
|
static int ext4_shutdown(struct super_block *sb, unsigned long arg)
|
|
{
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
__u32 flags;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (get_user(flags, (__u32 __user *)arg))
|
|
return -EFAULT;
|
|
|
|
if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
|
|
return -EINVAL;
|
|
|
|
if (ext4_forced_shutdown(sbi))
|
|
return 0;
|
|
|
|
ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
|
|
trace_ext4_shutdown(sb, flags);
|
|
|
|
switch (flags) {
|
|
case EXT4_GOING_FLAGS_DEFAULT:
|
|
freeze_bdev(sb->s_bdev);
|
|
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
|
|
thaw_bdev(sb->s_bdev, sb);
|
|
break;
|
|
case EXT4_GOING_FLAGS_LOGFLUSH:
|
|
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
|
|
if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
|
|
(void) ext4_force_commit(sb);
|
|
jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
|
|
}
|
|
break;
|
|
case EXT4_GOING_FLAGS_NOLOGFLUSH:
|
|
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
|
|
if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
|
|
jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
clear_opt(sb, DISCARD);
|
|
return 0;
|
|
}
|
|
|
|
struct getfsmap_info {
|
|
struct super_block *gi_sb;
|
|
struct fsmap_head __user *gi_data;
|
|
unsigned int gi_idx;
|
|
__u32 gi_last_flags;
|
|
};
|
|
|
|
static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
|
|
{
|
|
struct getfsmap_info *info = priv;
|
|
struct fsmap fm;
|
|
|
|
trace_ext4_getfsmap_mapping(info->gi_sb, xfm);
|
|
|
|
info->gi_last_flags = xfm->fmr_flags;
|
|
ext4_fsmap_from_internal(info->gi_sb, &fm, xfm);
|
|
if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm,
|
|
sizeof(struct fsmap)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ext4_ioc_getfsmap(struct super_block *sb,
|
|
struct fsmap_head __user *arg)
|
|
{
|
|
struct getfsmap_info info = {0};
|
|
struct ext4_fsmap_head xhead = {0};
|
|
struct fsmap_head head;
|
|
bool aborted = false;
|
|
int error;
|
|
|
|
if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
|
|
return -EFAULT;
|
|
if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
|
|
memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
|
|
sizeof(head.fmh_keys[0].fmr_reserved)) ||
|
|
memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
|
|
sizeof(head.fmh_keys[1].fmr_reserved)))
|
|
return -EINVAL;
|
|
/*
|
|
* ext4 doesn't report file extents at all, so the only valid
|
|
* file offsets are the magic ones (all zeroes or all ones).
|
|
*/
|
|
if (head.fmh_keys[0].fmr_offset ||
|
|
(head.fmh_keys[1].fmr_offset != 0 &&
|
|
head.fmh_keys[1].fmr_offset != -1ULL))
|
|
return -EINVAL;
|
|
|
|
xhead.fmh_iflags = head.fmh_iflags;
|
|
xhead.fmh_count = head.fmh_count;
|
|
ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]);
|
|
ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]);
|
|
|
|
trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]);
|
|
trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]);
|
|
|
|
info.gi_sb = sb;
|
|
info.gi_data = arg;
|
|
error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info);
|
|
if (error == EXT4_QUERY_RANGE_ABORT) {
|
|
error = 0;
|
|
aborted = true;
|
|
} else if (error)
|
|
return error;
|
|
|
|
/* If we didn't abort, set the "last" flag in the last fmx */
|
|
if (!aborted && info.gi_idx) {
|
|
info.gi_last_flags |= FMR_OF_LAST;
|
|
if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags,
|
|
&info.gi_last_flags,
|
|
sizeof(info.gi_last_flags)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* copy back header */
|
|
head.fmh_entries = xhead.fmh_entries;
|
|
head.fmh_oflags = xhead.fmh_oflags;
|
|
if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long ext4_ioctl_group_add(struct file *file,
|
|
struct ext4_new_group_data *input)
|
|
{
|
|
struct super_block *sb = file_inode(file)->i_sb;
|
|
int err, err2=0;
|
|
|
|
err = ext4_resize_begin(sb);
|
|
if (err)
|
|
return err;
|
|
|
|
if (ext4_has_feature_bigalloc(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Online resizing not supported with bigalloc");
|
|
err = -EOPNOTSUPP;
|
|
goto group_add_out;
|
|
}
|
|
|
|
err = mnt_want_write_file(file);
|
|
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(file);
|
|
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;
|
|
}
|
|
|
|
static int ext4_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
|
|
{
|
|
/*
|
|
* Project Quota ID state is only allowed to change from within the init
|
|
* namespace. Enforce that restriction only if we are trying to change
|
|
* the quota ID state. Everything else is allowed in user namespaces.
|
|
*/
|
|
if (current_user_ns() == &init_user_ns)
|
|
return 0;
|
|
|
|
if (__kprojid_val(EXT4_I(inode)->i_projid) != fa->fsx_projid)
|
|
return -EINVAL;
|
|
|
|
if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT)) {
|
|
if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
|
|
return -EINVAL;
|
|
} else {
|
|
if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 FS_IOC_GETFSMAP:
|
|
return ext4_ioc_getfsmap(sb, (void __user *)arg);
|
|
case EXT4_IOC_GETFLAGS:
|
|
flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
|
|
return put_user(flags, (int __user *) arg);
|
|
case EXT4_IOC_SETFLAGS: {
|
|
int err;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
if (get_user(flags, (int __user *) arg))
|
|
return -EFAULT;
|
|
|
|
if (flags & ~EXT4_FL_USER_VISIBLE)
|
|
return -EOPNOTSUPP;
|
|
/*
|
|
* chattr(1) grabs flags via GETFLAGS, modifies the result and
|
|
* passes that to SETFLAGS. So we cannot easily make SETFLAGS
|
|
* more restrictive than just silently masking off visible but
|
|
* not settable flags as we always did.
|
|
*/
|
|
flags &= EXT4_FL_USER_MODIFIABLE;
|
|
if (ext4_mask_flags(inode->i_mode, flags) != flags)
|
|
return -EOPNOTSUPP;
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
|
|
inode_lock(inode);
|
|
err = ext4_ioctl_setflags(inode, flags);
|
|
inode_unlock(inode);
|
|
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;
|
|
}
|
|
|
|
inode_lock(inode);
|
|
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 = current_time(inode);
|
|
inode->i_generation = generation;
|
|
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
|
|
}
|
|
ext4_journal_stop(handle);
|
|
|
|
unlock_out:
|
|
inode_unlock(inode);
|
|
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_feature_bigalloc(sb)) {
|
|
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_feature_bigalloc(sb)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Online defrag not supported with bigalloc");
|
|
err = -EOPNOTSUPP;
|
|
goto mext_out;
|
|
} else if (IS_DAX(inode)) {
|
|
ext4_msg(sb, KERN_ERR,
|
|
"Online defrag not supported with DAX");
|
|
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;
|
|
|
|
if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
|
|
sizeof(input)))
|
|
return -EFAULT;
|
|
|
|
return ext4_ioctl_group_add(filp, &input);
|
|
}
|
|
|
|
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.
|
|
*/
|
|
inode_lock((inode));
|
|
err = ext4_ext_migrate(inode);
|
|
inode_unlock((inode));
|
|
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 (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:
|
|
if (!ext4_has_feature_encrypt(sb))
|
|
return -EOPNOTSUPP;
|
|
return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
|
|
|
|
case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
|
|
#ifdef CONFIG_FS_ENCRYPTION
|
|
int err, err2;
|
|
struct ext4_sb_info *sbi = EXT4_SB(sb);
|
|
handle_t *handle;
|
|
|
|
if (!ext4_has_feature_encrypt(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 __user *) arg,
|
|
sbi->s_es->s_encrypt_pw_salt, 16))
|
|
return -EFAULT;
|
|
return 0;
|
|
#else
|
|
return -EOPNOTSUPP;
|
|
#endif
|
|
}
|
|
case EXT4_IOC_GET_ENCRYPTION_POLICY:
|
|
return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
|
|
|
|
case EXT4_IOC_FSGETXATTR:
|
|
{
|
|
struct fsxattr fa;
|
|
|
|
memset(&fa, 0, sizeof(struct fsxattr));
|
|
fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
|
|
|
|
if (ext4_has_feature_project(inode->i_sb)) {
|
|
fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
|
|
EXT4_I(inode)->i_projid);
|
|
}
|
|
|
|
if (copy_to_user((struct fsxattr __user *)arg,
|
|
&fa, sizeof(fa)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case EXT4_IOC_FSSETXATTR:
|
|
{
|
|
struct fsxattr fa;
|
|
int err;
|
|
|
|
if (copy_from_user(&fa, (struct fsxattr __user *)arg,
|
|
sizeof(fa)))
|
|
return -EFAULT;
|
|
|
|
/* Make sure caller has proper permission */
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
|
|
return -EOPNOTSUPP;
|
|
|
|
flags = ext4_xflags_to_iflags(fa.fsx_xflags);
|
|
if (ext4_mask_flags(inode->i_mode, flags) != flags)
|
|
return -EOPNOTSUPP;
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
|
|
inode_lock(inode);
|
|
err = ext4_ioctl_check_project(inode, &fa);
|
|
if (err)
|
|
goto out;
|
|
flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
|
|
(flags & EXT4_FL_XFLAG_VISIBLE);
|
|
err = ext4_ioctl_setflags(inode, flags);
|
|
if (err)
|
|
goto out;
|
|
err = ext4_ioctl_setproject(filp, fa.fsx_projid);
|
|
out:
|
|
inode_unlock(inode);
|
|
mnt_drop_write_file(filp);
|
|
return err;
|
|
}
|
|
case EXT4_IOC_SHUTDOWN:
|
|
return ext4_shutdown(sb, arg);
|
|
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_data input;
|
|
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;
|
|
return ext4_ioctl_group_add(file, &input);
|
|
}
|
|
case EXT4_IOC_MOVE_EXT:
|
|
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:
|
|
case EXT4_IOC_SHUTDOWN:
|
|
case FS_IOC_GETFSMAP:
|
|
break;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
|
|
}
|
|
#endif
|