#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/quotaops.h>
#include <linux/random.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/iversion.h>
#include <linux/fileattr.h>
#include <linux/uuid.h>
#include "ext4_jbd2.h"
#include "ext4.h"
#include <linux/fsmap.h>
#include "fsmap.h"
#include <trace/events/ext4.h>
#include <linux/fserror.h>
typedef void ext4_update_sb_callback(struct ext4_sb_info *sbi,
struct ext4_super_block *es,
const void *arg);
static void ext4_sb_setlabel(struct ext4_sb_info *sbi,
struct ext4_super_block *es, const void *arg)
{
BUILD_BUG_ON(sizeof(es->s_volume_name) < EXT4_LABEL_MAX);
memcpy(es->s_volume_name, (char *)arg, EXT4_LABEL_MAX);
}
static void ext4_sb_setuuid(struct ext4_sb_info *sbi,
struct ext4_super_block *es, const void *arg)
{
memcpy(es->s_uuid, (__u8 *)arg, UUID_SIZE);
}
static
int ext4_update_primary_sb(struct super_block *sb, handle_t *handle,
ext4_update_sb_callback func,
const void *arg)
{
int err = 0;
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct buffer_head *bh = sbi->s_sbh;
struct ext4_super_block *es = sbi->s_es;
trace_ext4_update_sb(sb, bh->b_blocknr, 1);
BUFFER_TRACE(bh, "get_write_access");
err = ext4_journal_get_write_access(handle, sb,
bh,
EXT4_JTR_NONE);
if (err)
goto out_err;
lock_buffer(bh);
func(sbi, es, arg);
ext4_superblock_csum_set(sb);
unlock_buffer(bh);
if (buffer_write_io_error(bh) || !buffer_uptodate(bh)) {
ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to "
"superblock detected");
clear_buffer_write_io_error(bh);
set_buffer_uptodate(bh);
}
err = ext4_handle_dirty_metadata(handle, NULL, bh);
if (err)
goto out_err;
err = sync_dirty_buffer(bh);
out_err:
ext4_std_error(sb, err);
return err;
}
static int ext4_update_backup_sb(struct super_block *sb,
handle_t *handle, ext4_group_t grp,
ext4_update_sb_callback func, const void *arg)
{
int err = 0;
ext4_fsblk_t sb_block;
struct buffer_head *bh;
unsigned long offset = 0;
struct ext4_super_block *es;
if (!ext4_bg_has_super(sb, grp))
return 0;
if (grp == 0) {
sb_block = 1 * EXT4_MIN_BLOCK_SIZE;
offset = do_div(sb_block, sb->s_blocksize);
} else {
sb_block = ext4_group_first_block_no(sb, grp);
offset = 0;
}
trace_ext4_update_sb(sb, sb_block, handle ? 1 : 0);
bh = ext4_sb_bread(sb, sb_block, 0);
if (IS_ERR(bh))
return PTR_ERR(bh);
if (handle) {
BUFFER_TRACE(bh, "get_write_access");
err = ext4_journal_get_write_access(handle, sb,
bh,
EXT4_JTR_NONE);
if (err)
goto out_bh;
}
es = (struct ext4_super_block *) (bh->b_data + offset);
lock_buffer(bh);
if (ext4_has_feature_metadata_csum(sb) &&
es->s_checksum != ext4_superblock_csum(es)) {
ext4_msg(sb, KERN_ERR, "Invalid checksum for backup "
"superblock %llu", sb_block);
unlock_buffer(bh);
goto out_bh;
}
func(EXT4_SB(sb), es, arg);
if (ext4_has_feature_metadata_csum(sb))
es->s_checksum = ext4_superblock_csum(es);
set_buffer_uptodate(bh);
unlock_buffer(bh);
if (handle) {
err = ext4_handle_dirty_metadata(handle, NULL, bh);
if (err)
goto out_bh;
} else {
BUFFER_TRACE(bh, "marking dirty");
mark_buffer_dirty(bh);
}
err = sync_dirty_buffer(bh);
out_bh:
brelse(bh);
ext4_std_error(sb, err);
return (err) ? err : 1;
}
static
int ext4_update_superblocks_fn(struct super_block *sb,
ext4_update_sb_callback func,
const void *arg)
{
handle_t *handle;
ext4_group_t ngroups;
unsigned int three = 1;
unsigned int five = 5;
unsigned int seven = 7;
int err = 0, ret, i;
ext4_group_t grp, primary_grp;
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING,
&sbi->s_ext4_flags)) {
ext4_msg(sb, KERN_ERR, "Can't modify superblock while"
"performing online resize");
return -EBUSY;
}
handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 3);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
goto out;
}
err = ext4_update_primary_sb(sb, handle, func, arg);
if (err) {
ext4_msg(sb, KERN_ERR, "Failed to update primary "
"superblock");
goto out_journal;
}
primary_grp = ext4_get_group_number(sb, sbi->s_sbh->b_blocknr);
ngroups = ext4_get_groups_count(sb);
i = 0;
grp = 0;
while (grp < ngroups) {
if (grp == primary_grp)
goto next_grp;
ret = ext4_update_backup_sb(sb, handle, grp, func, arg);
if (ret < 0) {
if (ret == -EFSBADCRC)
goto next_grp;
err = ret;
goto out_journal;
}
i += ret;
if (handle && i > 1) {
err = ext4_journal_stop(handle);
if (err)
goto out;
handle = NULL;
}
next_grp:
grp = ext4_list_backups(sb, &three, &five, &seven);
}
out_journal:
if (handle) {
ret = ext4_journal_stop(handle);
if (ret && !err)
err = ret;
}
out:
clear_bit_unlock(EXT4_FLAGS_RESIZING, &sbi->s_ext4_flags);
smp_mb__after_atomic();
return err ? err : 0;
}
static void memswap(void *a, void *b, size_t len)
{
unsigned char *ap, *bp;
ap = (unsigned char *)a;
bp = (unsigned char *)b;
while (len-- > 0) {
swap(*ap, *bp);
ap++;
bp++;
}
}
static void swap_inode_data(struct inode *inode1, struct inode *inode2)
{
loff_t isize;
struct ext4_inode_info *ei1;
struct ext4_inode_info *ei2;
unsigned long tmp;
struct timespec64 ts1, ts2;
ei1 = EXT4_I(inode1);
ei2 = EXT4_I(inode2);
swap(inode1->i_version, inode2->i_version);
ts1 = inode_get_atime(inode1);
ts2 = inode_get_atime(inode2);
inode_set_atime_to_ts(inode1, ts2);
inode_set_atime_to_ts(inode2, ts1);
ts1 = inode_get_mtime(inode1);
ts2 = inode_get_mtime(inode2);
inode_set_mtime_to_ts(inode1, ts2);
inode_set_mtime_to_ts(inode2, ts1);
memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
(ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
swap(ei1->i_disksize, ei2->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);
}
void ext4_reset_inode_seed(struct inode *inode)
{
struct ext4_inode_info *ei = EXT4_I(inode);
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
__le32 inum = cpu_to_le32(inode->i_ino);
__le32 gen = cpu_to_le32(inode->i_generation);
__u32 csum;
if (!ext4_has_feature_metadata_csum(inode->i_sb))
return;
csum = ext4_chksum(sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
ei->i_csum_seed = ext4_chksum(csum, (__u8 *)&gen, sizeof(gen));
}
static long swap_inode_boot_loader(struct super_block *sb,
struct mnt_idmap *idmap,
struct inode *inode)
{
handle_t *handle;
int err;
struct inode *inode_bl;
struct ext4_inode_info *ei_bl;
qsize_t size, size_bl, diff;
blkcnt_t blocks;
unsigned short bytes;
inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO,
EXT4_IGET_SPECIAL | EXT4_IGET_BAD);
if (IS_ERR(inode_bl))
return PTR_ERR(inode_bl);
ei_bl = EXT4_I(inode_bl);
lock_two_nondirectories(inode, inode_bl);
if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
(EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
ext4_has_inline_data(inode)) {
err = -EINVAL;
goto journal_err_out;
}
if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
!inode_owner_or_capable(idmap, inode) ||
!capable(CAP_SYS_ADMIN)) {
err = -EPERM;
goto journal_err_out;
}
filemap_invalidate_lock(inode->i_mapping);
err = filemap_write_and_wait(inode->i_mapping);
if (err)
goto err_out;
err = filemap_write_and_wait(inode_bl->i_mapping);
if (err)
goto err_out;
inode_dio_wait(inode);
inode_dio_wait(inode_bl);
truncate_inode_pages(&inode->i_data, 0);
truncate_inode_pages(&inode_bl->i_data, 0);
handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
if (IS_ERR(handle)) {
err = -EINVAL;
goto err_out;
}
ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT, handle);
ext4_double_down_write_data_sem(inode, inode_bl);
if (is_bad_inode(inode_bl) || !S_ISREG(inode_bl->i_mode)) {
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_set_iversion(inode_bl, 1);
i_size_write(inode_bl, 0);
EXT4_I(inode_bl)->i_disksize = inode_bl->i_size;
inode_bl->i_mode = S_IFREG;
if (ext4_has_feature_extents(sb)) {
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));
}
err = dquot_initialize(inode);
if (err)
goto err_out1;
size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
diff = size - size_bl;
swap_inode_data(inode, inode_bl);
inode_set_ctime_current(inode);
inode_set_ctime_current(inode_bl);
inode_inc_iversion(inode);
inode->i_generation = get_random_u32();
inode_bl->i_generation = get_random_u32();
ext4_reset_inode_seed(inode);
ext4_reset_inode_seed(inode_bl);
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);
swap_inode_data(inode, inode_bl);
ext4_mark_inode_dirty(handle, inode);
goto err_out1;
}
blocks = inode_bl->i_blocks;
bytes = inode_bl->i_bytes;
inode_bl->i_blocks = inode->i_blocks;
inode_bl->i_bytes = inode->i_bytes;
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);
goto revert;
}
if (diff > 0)
dquot_free_space(inode, diff);
else
err = dquot_alloc_space(inode, -1 * diff);
if (err < 0) {
revert:
inode_bl->i_blocks = blocks;
inode_bl->i_bytes = bytes;
swap_inode_data(inode, inode_bl);
ext4_mark_inode_dirty(handle, inode);
ext4_mark_inode_dirty(handle, inode_bl);
}
err_out1:
ext4_journal_stop(handle);
ext4_double_up_write_data_sem(inode, inode_bl);
err_out:
filemap_invalidate_unlock(inode->i_mapping);
journal_err_out:
unlock_two_nondirectories(inode, inode_bl);
iput(inode_bl);
return err;
}
static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
unsigned int flags)
{
struct ext4_inode_info *ei = EXT4_I(inode);
unsigned int oldflags = ei->i_flags;
if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
return 0;
if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
return -EPERM;
if (ext4_has_feature_project(inode->i_sb) &&
__kprojid_val(ei->i_projid) != new_projid)
return -EPERM;
return 0;
}
static void ext4_dax_dontcache(struct inode *inode, unsigned int flags)
{
struct ext4_inode_info *ei = EXT4_I(inode);
if (S_ISDIR(inode->i_mode))
return;
if (test_opt2(inode->i_sb, DAX_NEVER) ||
test_opt(inode->i_sb, DAX_ALWAYS))
return;
if ((ei->i_flags ^ flags) & EXT4_DAX_FL)
d_mark_dontcache(inode);
}
static bool dax_compatible(struct inode *inode, unsigned int oldflags,
unsigned int flags)
{
if (S_ISDIR(inode->i_mode)) {
flags &= ~EXT4_INLINE_DATA_FL;
oldflags &= ~EXT4_INLINE_DATA_FL;
}
if (flags & EXT4_DAX_FL) {
if ((oldflags & EXT4_DAX_MUT_EXCL) ||
ext4_test_inode_state(inode,
EXT4_STATE_VERITY_IN_PROGRESS)) {
return false;
}
}
if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL))
return false;
return true;
}
static int ext4_ioctl_setflags(struct inode *inode,
unsigned int flags)
{
struct ext4_inode_info *ei = EXT4_I(inode);
handle_t *handle = NULL;
int err = -EPERM, migrate = 0;
struct ext4_iloc iloc;
unsigned int oldflags, mask, i;
struct super_block *sb = inode->i_sb;
if (ext4_is_quota_file(inode))
goto flags_out;
oldflags = ei->i_flags;
if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
if (!capable(CAP_SYS_RESOURCE))
goto flags_out;
}
if (!dax_compatible(inode, oldflags, flags)) {
err = -EOPNOTSUPP;
goto flags_out;
}
if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
migrate = 1;
if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
if (!ext4_has_feature_casefold(sb)) {
err = -EOPNOTSUPP;
goto flags_out;
}
if (!S_ISDIR(inode->i_mode)) {
err = -ENOTDIR;
goto flags_out;
}
if (!ext4_empty_dir(inode)) {
err = -ENOTEMPTY;
goto flags_out;
}
}
if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
(flags & EXT4_IMMUTABLE_FL)) {
inode_dio_wait(inode);
err = filemap_write_and_wait(inode->i_mapping);
if (err)
goto flags_out;
}
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;
ext4_dax_dontcache(inode, flags);
for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
if (!(mask & EXT4_FL_USER_MODIFIABLE))
continue;
if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL)
continue;
if (mask & flags)
ext4_set_inode_flag(inode, i);
else
ext4_clear_inode_flag(inode, i);
}
ext4_set_inode_flags(inode, false);
inode_set_ctime_current(inode);
inode_inc_iversion(inode);
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
ext4_journal_stop(handle);
if (err)
goto flags_out;
if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
if (IS_DAX(inode)) {
err = -EBUSY;
goto flags_out;
}
err = ext4_change_inode_journal_flag(inode,
flags & EXT4_JOURNAL_DATA_FL);
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:
return err;
}
#ifdef CONFIG_QUOTA
static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
{
struct super_block *sb = inode->i_sb;
struct ext4_inode_info *ei = EXT4_I(inode);
int err, rc;
handle_t *handle;
kprojid_t kprojid;
struct ext4_iloc iloc;
struct ext4_inode *raw_inode;
struct dquot *transfer_to[MAXQUOTAS] = { };
if (!ext4_has_feature_project(sb)) {
if (projid != EXT4_DEF_PROJID)
return -EOPNOTSUPP;
else
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;
if (ext4_is_quota_file(inode))
return err;
err = dquot_initialize(inode);
if (err)
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);
}
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])) {
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_set_ctime_current(inode);
inode_inc_iversion(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 inode *inode, __u32 projid)
{
if (projid != EXT4_DEF_PROJID)
return -EOPNOTSUPP;
return 0;
}
#endif
int ext4_force_shutdown(struct super_block *sb, u32 flags)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
int ret;
if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH)
return -EINVAL;
if (ext4_forced_shutdown(sb))
return 0;
ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
trace_ext4_shutdown(sb, flags);
switch (flags) {
case EXT4_GOING_FLAGS_DEFAULT:
ret = bdev_freeze(sb->s_bdev);
if (ret)
return ret;
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
bdev_thaw(sb->s_bdev);
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);
fserror_report_shutdown(sb, GFP_KERNEL);
return 0;
}
static int ext4_ioctl_shutdown(struct super_block *sb, unsigned long arg)
{
u32 flags;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (get_user(flags, (__u32 __user *)arg))
return -EFAULT;
return ext4_force_shutdown(sb, flags);
}
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 = { NULL };
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;
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)
aborted = true;
else if (error)
return error;
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;
}
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) {
ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL);
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
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:
err2 = ext4_resize_end(sb, false);
if (err == 0)
err = err2;
return err;
}
int ext4_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
{
struct inode *inode = d_inode(dentry);
struct ext4_inode_info *ei = EXT4_I(inode);
u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
if (S_ISREG(inode->i_mode))
flags &= ~FS_PROJINHERIT_FL;
fileattr_fill_flags(fa, flags);
if (ext4_has_feature_project(inode->i_sb))
fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
return 0;
}
int ext4_fileattr_set(struct mnt_idmap *idmap,
struct dentry *dentry, struct file_kattr *fa)
{
struct inode *inode = d_inode(dentry);
u32 flags = fa->flags;
int err = -EOPNOTSUPP;
if (flags & ~EXT4_FL_USER_VISIBLE)
goto out;
flags &= EXT4_FL_USER_MODIFIABLE;
if (ext4_mask_flags(inode->i_mode, flags) != flags)
goto out;
err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags);
if (err)
goto out;
err = ext4_ioctl_setflags(inode, flags);
if (err)
goto out;
err = ext4_ioctl_setproject(inode, fa->fsx_projid);
out:
return err;
}
#define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
{
struct fiemap fiemap;
struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
struct fiemap_extent_info fieinfo = { 0, };
struct inode *inode = file_inode(filp);
int error;
if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
return -EFAULT;
if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
return -EINVAL;
fieinfo.fi_flags = fiemap.fm_flags;
fieinfo.fi_extents_max = fiemap.fm_extent_count;
fieinfo.fi_extents_start = ufiemap->fm_extents;
error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
fiemap.fm_length);
fiemap.fm_flags = fieinfo.fi_flags;
fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
error = -EFAULT;
return error;
}
static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg)
{
int err = 0;
__u32 flags = 0;
unsigned int flush_flags = 0;
struct super_block *sb = file_inode(filp)->i_sb;
if (copy_from_user(&flags, (__u32 __user *)arg,
sizeof(__u32)))
return -EFAULT;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) ||
((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
(flags & JBD2_JOURNAL_FLUSH_ZEROOUT)))
return -EINVAL;
if (!EXT4_SB(sb)->s_journal)
return -ENODEV;
if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) &&
!bdev_max_discard_sectors(EXT4_SB(sb)->s_journal->j_dev))
return -EOPNOTSUPP;
if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)
return 0;
if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD)
flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD;
if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) {
flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT;
pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow");
}
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags);
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
return err;
}
static int ext4_ioctl_setlabel(struct file *filp, const char __user *user_label)
{
size_t len;
int ret = 0;
char new_label[EXT4_LABEL_MAX + 1];
struct super_block *sb = file_inode(filp)->i_sb;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(new_label, user_label, EXT4_LABEL_MAX + 1))
return -EFAULT;
len = strnlen(new_label, EXT4_LABEL_MAX + 1);
if (len > EXT4_LABEL_MAX)
return -EINVAL;
memset(new_label + len, 0, EXT4_LABEL_MAX - len);
ret = mnt_want_write_file(filp);
if (ret)
return ret;
ret = ext4_update_superblocks_fn(sb, ext4_sb_setlabel, new_label);
mnt_drop_write_file(filp);
return ret;
}
static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label)
{
char label[EXT4_LABEL_MAX + 1];
BUILD_BUG_ON(EXT4_LABEL_MAX >= FSLABEL_MAX);
lock_buffer(sbi->s_sbh);
memtostr_pad(label, sbi->s_es->s_volume_name);
unlock_buffer(sbi->s_sbh);
if (copy_to_user(user_label, label, sizeof(label)))
return -EFAULT;
return 0;
}
static int ext4_ioctl_getuuid(struct ext4_sb_info *sbi,
struct fsuuid __user *ufsuuid)
{
struct fsuuid fsuuid;
__u8 uuid[UUID_SIZE];
if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
return -EFAULT;
if (fsuuid.fsu_len == 0) {
fsuuid.fsu_len = UUID_SIZE;
if (copy_to_user(&ufsuuid->fsu_len, &fsuuid.fsu_len,
sizeof(fsuuid.fsu_len)))
return -EFAULT;
return 0;
}
if (fsuuid.fsu_len < UUID_SIZE || fsuuid.fsu_flags != 0)
return -EINVAL;
lock_buffer(sbi->s_sbh);
memcpy(uuid, sbi->s_es->s_uuid, UUID_SIZE);
unlock_buffer(sbi->s_sbh);
fsuuid.fsu_len = UUID_SIZE;
if (copy_to_user(ufsuuid, &fsuuid, sizeof(fsuuid)) ||
copy_to_user(&ufsuuid->fsu_uuid[0], uuid, UUID_SIZE))
return -EFAULT;
return 0;
}
static int ext4_ioctl_setuuid(struct file *filp,
const struct fsuuid __user *ufsuuid)
{
int ret = 0;
struct super_block *sb = file_inode(filp)->i_sb;
struct fsuuid fsuuid;
__u8 uuid[UUID_SIZE];
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (((ext4_has_feature_gdt_csum(sb) ||
ext4_has_feature_metadata_csum(sb))
&& !ext4_has_feature_csum_seed(sb))
|| ext4_has_feature_stable_inodes(sb))
return -EOPNOTSUPP;
if (copy_from_user(&fsuuid, ufsuuid, sizeof(fsuuid)))
return -EFAULT;
if (fsuuid.fsu_len != UUID_SIZE || fsuuid.fsu_flags != 0)
return -EINVAL;
if (copy_from_user(uuid, &ufsuuid->fsu_uuid[0], UUID_SIZE))
return -EFAULT;
ret = mnt_want_write_file(filp);
if (ret)
return ret;
ret = ext4_update_superblocks_fn(sb, ext4_sb_setuuid, &uuid);
mnt_drop_write_file(filp);
return ret;
}
#define TUNE_OPS_SUPPORTED (EXT4_TUNE_FL_ERRORS_BEHAVIOR | \
EXT4_TUNE_FL_MNT_COUNT | EXT4_TUNE_FL_MAX_MNT_COUNT | \
EXT4_TUNE_FL_CHECKINTRVAL | EXT4_TUNE_FL_LAST_CHECK_TIME | \
EXT4_TUNE_FL_RESERVED_BLOCKS | EXT4_TUNE_FL_RESERVED_UID | \
EXT4_TUNE_FL_RESERVED_GID | EXT4_TUNE_FL_DEFAULT_MNT_OPTS | \
EXT4_TUNE_FL_DEF_HASH_ALG | EXT4_TUNE_FL_RAID_STRIDE | \
EXT4_TUNE_FL_RAID_STRIPE_WIDTH | EXT4_TUNE_FL_MOUNT_OPTS | \
EXT4_TUNE_FL_FEATURES | EXT4_TUNE_FL_EDIT_FEATURES | \
EXT4_TUNE_FL_FORCE_FSCK | EXT4_TUNE_FL_ENCODING | \
EXT4_TUNE_FL_ENCODING_FLAGS)
#define EXT4_TUNE_SET_COMPAT_SUPP \
(EXT4_FEATURE_COMPAT_DIR_INDEX | \
EXT4_FEATURE_COMPAT_STABLE_INODES)
#define EXT4_TUNE_SET_INCOMPAT_SUPP \
(EXT4_FEATURE_INCOMPAT_EXTENTS | \
EXT4_FEATURE_INCOMPAT_EA_INODE | \
EXT4_FEATURE_INCOMPAT_ENCRYPT | \
EXT4_FEATURE_INCOMPAT_CSUM_SEED | \
EXT4_FEATURE_INCOMPAT_LARGEDIR | \
EXT4_FEATURE_INCOMPAT_CASEFOLD)
#define EXT4_TUNE_SET_RO_COMPAT_SUPP \
(EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
EXT4_FEATURE_RO_COMPAT_PROJECT | \
EXT4_FEATURE_RO_COMPAT_VERITY)
#define EXT4_TUNE_CLEAR_COMPAT_SUPP (0)
#define EXT4_TUNE_CLEAR_INCOMPAT_SUPP (0)
#define EXT4_TUNE_CLEAR_RO_COMPAT_SUPP (0)
#define SB_ENC_SUPP_MASK (SB_ENC_STRICT_MODE_FL | \
SB_ENC_NO_COMPAT_FALLBACK_FL)
static int ext4_ioctl_get_tune_sb(struct ext4_sb_info *sbi,
struct ext4_tune_sb_params __user *params)
{
struct ext4_tune_sb_params ret;
struct ext4_super_block *es = sbi->s_es;
memset(&ret, 0, sizeof(ret));
ret.set_flags = TUNE_OPS_SUPPORTED;
ret.errors_behavior = le16_to_cpu(es->s_errors);
ret.mnt_count = le16_to_cpu(es->s_mnt_count);
ret.max_mnt_count = le16_to_cpu(es->s_max_mnt_count);
ret.checkinterval = le32_to_cpu(es->s_checkinterval);
ret.last_check_time = le32_to_cpu(es->s_lastcheck);
ret.reserved_blocks = ext4_r_blocks_count(es);
ret.blocks_count = ext4_blocks_count(es);
ret.reserved_uid = ext4_get_resuid(es);
ret.reserved_gid = ext4_get_resgid(es);
ret.default_mnt_opts = le32_to_cpu(es->s_default_mount_opts);
ret.def_hash_alg = es->s_def_hash_version;
ret.raid_stride = le16_to_cpu(es->s_raid_stride);
ret.raid_stripe_width = le32_to_cpu(es->s_raid_stripe_width);
ret.encoding = le16_to_cpu(es->s_encoding);
ret.encoding_flags = le16_to_cpu(es->s_encoding_flags);
strscpy_pad(ret.mount_opts, es->s_mount_opts);
ret.feature_compat = le32_to_cpu(es->s_feature_compat);
ret.feature_incompat = le32_to_cpu(es->s_feature_incompat);
ret.feature_ro_compat = le32_to_cpu(es->s_feature_ro_compat);
ret.set_feature_compat_mask = EXT4_TUNE_SET_COMPAT_SUPP;
ret.set_feature_incompat_mask = EXT4_TUNE_SET_INCOMPAT_SUPP;
ret.set_feature_ro_compat_mask = EXT4_TUNE_SET_RO_COMPAT_SUPP;
ret.clear_feature_compat_mask = EXT4_TUNE_CLEAR_COMPAT_SUPP;
ret.clear_feature_incompat_mask = EXT4_TUNE_CLEAR_INCOMPAT_SUPP;
ret.clear_feature_ro_compat_mask = EXT4_TUNE_CLEAR_RO_COMPAT_SUPP;
if (copy_to_user(params, &ret, sizeof(ret)))
return -EFAULT;
return 0;
}
static void ext4_sb_setparams(struct ext4_sb_info *sbi,
struct ext4_super_block *es, const void *arg)
{
const struct ext4_tune_sb_params *params = arg;
if (params->set_flags & EXT4_TUNE_FL_ERRORS_BEHAVIOR)
es->s_errors = cpu_to_le16(params->errors_behavior);
if (params->set_flags & EXT4_TUNE_FL_MNT_COUNT)
es->s_mnt_count = cpu_to_le16(params->mnt_count);
if (params->set_flags & EXT4_TUNE_FL_MAX_MNT_COUNT)
es->s_max_mnt_count = cpu_to_le16(params->max_mnt_count);
if (params->set_flags & EXT4_TUNE_FL_CHECKINTRVAL)
es->s_checkinterval = cpu_to_le32(params->checkinterval);
if (params->set_flags & EXT4_TUNE_FL_LAST_CHECK_TIME)
es->s_lastcheck = cpu_to_le32(params->last_check_time);
if (params->set_flags & EXT4_TUNE_FL_RESERVED_BLOCKS) {
ext4_fsblk_t blk = params->reserved_blocks;
es->s_r_blocks_count_lo = cpu_to_le32((u32)blk);
es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
}
if (params->set_flags & EXT4_TUNE_FL_RESERVED_UID) {
int uid = params->reserved_uid;
es->s_def_resuid = cpu_to_le16(uid & 0xFFFF);
es->s_def_resuid_hi = cpu_to_le16(uid >> 16);
}
if (params->set_flags & EXT4_TUNE_FL_RESERVED_GID) {
int gid = params->reserved_gid;
es->s_def_resgid = cpu_to_le16(gid & 0xFFFF);
es->s_def_resgid_hi = cpu_to_le16(gid >> 16);
}
if (params->set_flags & EXT4_TUNE_FL_DEFAULT_MNT_OPTS)
es->s_default_mount_opts = cpu_to_le32(params->default_mnt_opts);
if (params->set_flags & EXT4_TUNE_FL_DEF_HASH_ALG)
es->s_def_hash_version = params->def_hash_alg;
if (params->set_flags & EXT4_TUNE_FL_RAID_STRIDE)
es->s_raid_stride = cpu_to_le16(params->raid_stride);
if (params->set_flags & EXT4_TUNE_FL_RAID_STRIPE_WIDTH)
es->s_raid_stripe_width =
cpu_to_le32(params->raid_stripe_width);
if (params->set_flags & EXT4_TUNE_FL_ENCODING)
es->s_encoding = cpu_to_le16(params->encoding);
if (params->set_flags & EXT4_TUNE_FL_ENCODING_FLAGS)
es->s_encoding_flags = cpu_to_le16(params->encoding_flags);
strscpy_pad(es->s_mount_opts, params->mount_opts);
if (params->set_flags & EXT4_TUNE_FL_EDIT_FEATURES) {
es->s_feature_compat |=
cpu_to_le32(params->set_feature_compat_mask);
es->s_feature_incompat |=
cpu_to_le32(params->set_feature_incompat_mask);
es->s_feature_ro_compat |=
cpu_to_le32(params->set_feature_ro_compat_mask);
es->s_feature_compat &=
~cpu_to_le32(params->clear_feature_compat_mask);
es->s_feature_incompat &=
~cpu_to_le32(params->clear_feature_incompat_mask);
es->s_feature_ro_compat &=
~cpu_to_le32(params->clear_feature_ro_compat_mask);
if (params->set_feature_compat_mask &
EXT4_FEATURE_COMPAT_DIR_INDEX)
es->s_def_hash_version = sbi->s_def_hash_version;
if (params->set_feature_incompat_mask &
EXT4_FEATURE_INCOMPAT_CSUM_SEED)
es->s_checksum_seed = cpu_to_le32(sbi->s_csum_seed);
}
if (params->set_flags & EXT4_TUNE_FL_FORCE_FSCK)
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
}
static int ext4_ioctl_set_tune_sb(struct file *filp,
struct ext4_tune_sb_params __user *in)
{
struct ext4_tune_sb_params params;
struct super_block *sb = file_inode(filp)->i_sb;
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
int enabling_casefold = 0;
int ret;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(¶ms, in, sizeof(params)))
return -EFAULT;
if (strnlen(params.mount_opts, sizeof(params.mount_opts)) ==
sizeof(params.mount_opts))
return -E2BIG;
if ((params.set_flags & ~TUNE_OPS_SUPPORTED) != 0)
return -EOPNOTSUPP;
if ((params.set_flags & EXT4_TUNE_FL_ERRORS_BEHAVIOR) &&
(params.errors_behavior > EXT4_ERRORS_PANIC))
return -EINVAL;
if ((params.set_flags & EXT4_TUNE_FL_RESERVED_BLOCKS) &&
(params.reserved_blocks > ext4_blocks_count(sbi->s_es) / 2))
return -EINVAL;
if ((params.set_flags & EXT4_TUNE_FL_DEF_HASH_ALG) &&
((params.def_hash_alg > DX_HASH_LAST) ||
(params.def_hash_alg == DX_HASH_SIPHASH)))
return -EINVAL;
if ((params.set_flags & EXT4_TUNE_FL_FEATURES) &&
(params.set_flags & EXT4_TUNE_FL_EDIT_FEATURES))
return -EINVAL;
if (params.set_flags & EXT4_TUNE_FL_FEATURES) {
params.set_feature_compat_mask =
params.feature_compat &
~le32_to_cpu(es->s_feature_compat);
params.set_feature_incompat_mask =
params.feature_incompat &
~le32_to_cpu(es->s_feature_incompat);
params.set_feature_ro_compat_mask =
params.feature_ro_compat &
~le32_to_cpu(es->s_feature_ro_compat);
params.clear_feature_compat_mask =
~params.feature_compat &
le32_to_cpu(es->s_feature_compat);
params.clear_feature_incompat_mask =
~params.feature_incompat &
le32_to_cpu(es->s_feature_incompat);
params.clear_feature_ro_compat_mask =
~params.feature_ro_compat &
le32_to_cpu(es->s_feature_ro_compat);
params.set_flags |= EXT4_TUNE_FL_EDIT_FEATURES;
}
if (params.set_flags & EXT4_TUNE_FL_EDIT_FEATURES) {
if ((params.set_feature_compat_mask &
~EXT4_TUNE_SET_COMPAT_SUPP) ||
(params.set_feature_incompat_mask &
~EXT4_TUNE_SET_INCOMPAT_SUPP) ||
(params.set_feature_ro_compat_mask &
~EXT4_TUNE_SET_RO_COMPAT_SUPP) ||
(params.clear_feature_compat_mask &
~EXT4_TUNE_CLEAR_COMPAT_SUPP) ||
(params.clear_feature_incompat_mask &
~EXT4_TUNE_CLEAR_INCOMPAT_SUPP) ||
(params.clear_feature_ro_compat_mask &
~EXT4_TUNE_CLEAR_RO_COMPAT_SUPP))
return -EOPNOTSUPP;
params.set_feature_compat_mask &=
~le32_to_cpu(es->s_feature_compat);
params.set_feature_incompat_mask &=
~le32_to_cpu(es->s_feature_incompat);
params.set_feature_ro_compat_mask &=
~le32_to_cpu(es->s_feature_ro_compat);
if ((params.set_feature_incompat_mask &
EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
enabling_casefold = 1;
if (!(params.set_flags & EXT4_TUNE_FL_ENCODING)) {
params.encoding = EXT4_ENC_UTF8_12_1;
params.set_flags |= EXT4_TUNE_FL_ENCODING;
}
if (!(params.set_flags & EXT4_TUNE_FL_ENCODING_FLAGS)) {
params.encoding_flags = 0;
params.set_flags |= EXT4_TUNE_FL_ENCODING_FLAGS;
}
}
if ((params.set_feature_compat_mask &
EXT4_FEATURE_COMPAT_DIR_INDEX)) {
uuid_t uu;
memcpy(&uu, sbi->s_hash_seed, UUID_SIZE);
if (uuid_is_null(&uu))
generate_random_uuid((char *)
&sbi->s_hash_seed);
if (params.set_flags & EXT4_TUNE_FL_DEF_HASH_ALG)
sbi->s_def_hash_version = params.def_hash_alg;
else if (sbi->s_def_hash_version == 0)
sbi->s_def_hash_version = DX_HASH_HALF_MD4;
if (!(es->s_flags &
cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH)) &&
!(es->s_flags &
cpu_to_le32(EXT2_FLAGS_SIGNED_HASH))) {
#ifdef __CHAR_UNSIGNED__
sbi->s_hash_unsigned = 3;
#else
sbi->s_hash_unsigned = 0;
#endif
}
}
}
if (params.set_flags & EXT4_TUNE_FL_ENCODING) {
if (!enabling_casefold)
return -EINVAL;
if (params.encoding == 0)
params.encoding = EXT4_ENC_UTF8_12_1;
else if (params.encoding != EXT4_ENC_UTF8_12_1)
return -EINVAL;
}
if (params.set_flags & EXT4_TUNE_FL_ENCODING_FLAGS) {
if (!enabling_casefold)
return -EINVAL;
if (params.encoding_flags & ~SB_ENC_SUPP_MASK)
return -EINVAL;
}
ret = mnt_want_write_file(filp);
if (ret)
return ret;
ret = ext4_update_superblocks_fn(sb, ext4_sb_setparams, ¶ms);
mnt_drop_write_file(filp);
if (params.set_flags & EXT4_TUNE_FL_DEF_HASH_ALG)
sbi->s_def_hash_version = params.def_hash_alg;
return ret;
}
static 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 mnt_idmap *idmap = file_mnt_idmap(filp);
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_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(idmap, inode))
return -EPERM;
if (ext4_has_feature_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_set_ctime_current(inode);
inode_inc_iversion(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) {
ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE,
NULL);
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
}
if (err == 0)
err = err2;
mnt_drop_write_file(filp);
group_extend_out:
err2 = ext4_resize_end(sb, false);
if (err == 0)
err = err2;
return err;
}
case EXT4_IOC_MOVE_EXT: {
struct move_extent me;
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;
CLASS(fd, donor)(me.donor_fd);
if (fd_empty(donor))
return -EBADF;
if (!(fd_file(donor)->f_mode & FMODE_WRITE))
return -EBADF;
err = mnt_want_write_file(filp);
if (err)
return err;
err = ext4_move_extents(filp, fd_file(donor), 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;
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(idmap, inode))
return -EACCES;
err = mnt_want_write_file(filp);
if (err)
return err;
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(idmap, 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, idmap, 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) {
ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL);
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
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:
err2 = ext4_resize_end(sb, true);
if (err == 0)
err = err2;
return err;
}
case FITRIM:
{
struct fstrim_range range;
int ret = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (!bdev_max_discard_sectors(sb->s_bdev))
return -EOPNOTSUPP;
if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
return -EROFS;
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
sizeof(range)))
return -EFAULT;
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:
{
int ret;
inode_lock_shared(inode);
ret = ext4_ext_precache(inode);
inode_unlock_shared(inode);
return ret;
}
case FS_IOC_SET_ENCRYPTION_POLICY:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
case FS_IOC_GET_ENCRYPTION_PWSALT:
return ext4_ioctl_get_encryption_pwsalt(filp, (void __user *)arg);
case FS_IOC_GET_ENCRYPTION_POLICY:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
case FS_IOC_GET_ENCRYPTION_POLICY_EX:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
case FS_IOC_ADD_ENCRYPTION_KEY:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_add_key(filp, (void __user *)arg);
case FS_IOC_REMOVE_ENCRYPTION_KEY:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_remove_key_all_users(filp,
(void __user *)arg);
case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
case FS_IOC_GET_ENCRYPTION_NONCE:
if (!ext4_has_feature_encrypt(sb))
return -EOPNOTSUPP;
return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
case EXT4_IOC_CLEAR_ES_CACHE:
{
if (!inode_owner_or_capable(idmap, inode))
return -EACCES;
ext4_clear_inode_es(inode);
return 0;
}
case EXT4_IOC_GETSTATE:
{
__u32 state = 0;
if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED))
state |= EXT4_STATE_FLAG_EXT_PRECACHED;
if (ext4_test_inode_state(inode, EXT4_STATE_NEW))
state |= EXT4_STATE_FLAG_NEW;
if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY))
state |= EXT4_STATE_FLAG_NEWENTRY;
if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE))
state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE;
return put_user(state, (__u32 __user *) arg);
}
case EXT4_IOC_GET_ES_CACHE:
return ext4_ioctl_get_es_cache(filp, arg);
case EXT4_IOC_SHUTDOWN:
return ext4_ioctl_shutdown(sb, arg);
case FS_IOC_ENABLE_VERITY:
if (!ext4_has_feature_verity(sb))
return -EOPNOTSUPP;
return fsverity_ioctl_enable(filp, (const void __user *)arg);
case FS_IOC_MEASURE_VERITY:
if (!ext4_has_feature_verity(sb))
return -EOPNOTSUPP;
return fsverity_ioctl_measure(filp, (void __user *)arg);
case FS_IOC_READ_VERITY_METADATA:
if (!ext4_has_feature_verity(sb))
return -EOPNOTSUPP;
return fsverity_ioctl_read_metadata(filp,
(const void __user *)arg);
case EXT4_IOC_CHECKPOINT:
return ext4_ioctl_checkpoint(filp, arg);
case FS_IOC_GETFSLABEL:
return ext4_ioctl_getlabel(EXT4_SB(sb), (void __user *)arg);
case FS_IOC_SETFSLABEL:
return ext4_ioctl_setlabel(filp,
(const void __user *)arg);
case EXT4_IOC_GETFSUUID:
return ext4_ioctl_getuuid(EXT4_SB(sb), (void __user *)arg);
case EXT4_IOC_SETFSUUID:
return ext4_ioctl_setuuid(filp, (const void __user *)arg);
case EXT4_IOC_GET_TUNE_SB_PARAM:
return ext4_ioctl_get_tune_sb(EXT4_SB(sb),
(void __user *)arg);
case EXT4_IOC_SET_TUNE_SB_PARAM:
return ext4_ioctl_set_tune_sb(filp, (void __user *)arg);
default:
return -ENOTTY;
}
}
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
return __ext4_ioctl(filp, cmd, arg);
}
#ifdef CONFIG_COMPAT
long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
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 FITRIM:
case EXT4_IOC_PRECACHE_EXTENTS:
case FS_IOC_SET_ENCRYPTION_POLICY:
case FS_IOC_GET_ENCRYPTION_PWSALT:
case FS_IOC_GET_ENCRYPTION_POLICY:
case FS_IOC_GET_ENCRYPTION_POLICY_EX:
case FS_IOC_ADD_ENCRYPTION_KEY:
case FS_IOC_REMOVE_ENCRYPTION_KEY:
case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
case FS_IOC_GET_ENCRYPTION_NONCE:
case EXT4_IOC_SHUTDOWN:
case FS_IOC_GETFSMAP:
case FS_IOC_ENABLE_VERITY:
case FS_IOC_MEASURE_VERITY:
case FS_IOC_READ_VERITY_METADATA:
case EXT4_IOC_CLEAR_ES_CACHE:
case EXT4_IOC_GETSTATE:
case EXT4_IOC_GET_ES_CACHE:
case EXT4_IOC_CHECKPOINT:
case FS_IOC_GETFSLABEL:
case FS_IOC_SETFSLABEL:
case EXT4_IOC_GETFSUUID:
case EXT4_IOC_SETFSUUID:
break;
default:
return -ENOIOCTLCMD;
}
return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
}
#endif
static void set_overhead(struct ext4_sb_info *sbi,
struct ext4_super_block *es, const void *arg)
{
es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg));
}
int ext4_update_overhead(struct super_block *sb, bool force)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (ext4_emergency_state(sb) || sb_rdonly(sb))
return 0;
if (!force &&
(sbi->s_overhead == 0 ||
sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters)))
return 0;
return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead);
}
