v4.19.13 snapshot.
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
new file mode 100644
index 0000000..0edee31
--- /dev/null
+++ b/fs/ext4/ioctl.c
@@ -0,0 +1,1149 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/ext4/ioctl.c
+ *
+ * Copyright (C) 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ */
+
+#include <linux/fs.h>
+#include <linux/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/uuid.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/iversion.h>
+#include "ext4_jbd2.h"
+#include "ext4.h"
+#include <linux/fsmap.h>
+#include "fsmap.h"
+#include <trace/events/ext4.h>
+
+/**
+ * Swap memory between @a and @b for @len bytes.
+ *
+ * @a: pointer to first memory area
+ * @b: pointer to second memory area
+ * @len: number of bytes to swap
+ *
+ */
+static void memswap(void *a, void *b, size_t len)
+{
+ unsigned char *ap, *bp;
+
+ ap = (unsigned char *)a;
+ bp = (unsigned char *)b;
+ while (len-- > 0) {
+ swap(*ap, *bp);
+ ap++;
+ bp++;
+ }
+}
+
+/**
+ * Swap i_data and associated attributes between @inode1 and @inode2.
+ * This function is used for the primary swap between inode1 and inode2
+ * and also to revert this primary swap in case of errors.
+ *
+ * Therefore you have to make sure, that calling this method twice
+ * will revert all changes.
+ *
+ * @inode1: pointer to first inode
+ * @inode2: pointer to second inode
+ */
+static void swap_inode_data(struct inode *inode1, struct inode *inode2)
+{
+ loff_t isize;
+ struct ext4_inode_info *ei1;
+ struct ext4_inode_info *ei2;
+
+ ei1 = EXT4_I(inode1);
+ ei2 = EXT4_I(inode2);
+
+ swap(inode1->i_version, inode2->i_version);
+ swap(inode1->i_blocks, inode2->i_blocks);
+ swap(inode1->i_bytes, inode2->i_bytes);
+ swap(inode1->i_atime, inode2->i_atime);
+ swap(inode1->i_mtime, inode2->i_mtime);
+
+ memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
+ swap(ei1->i_flags, ei2->i_flags);
+ 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);
+}
+
+static void 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_metadata_csum(inode->i_sb))
+ return;
+
+ csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum));
+ ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen));
+}
+
+/**
+ * Swap the information from the given @inode and the inode
+ * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other
+ * important fields of the inodes.
+ *
+ * @sb: the super block of the filesystem
+ * @inode: the inode to swap with EXT4_BOOT_LOADER_INO
+ *
+ */
+static long swap_inode_boot_loader(struct super_block *sb,
+ struct inode *inode)
+{
+ handle_t *handle;
+ int err;
+ struct inode *inode_bl;
+ struct ext4_inode_info *ei_bl;
+
+ if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
+ IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
+ ext4_has_inline_data(inode))
+ return -EINVAL;
+
+ if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
+ !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
+ if (IS_ERR(inode_bl))
+ return PTR_ERR(inode_bl);
+ ei_bl = EXT4_I(inode_bl);
+
+ filemap_flush(inode->i_mapping);
+ filemap_flush(inode_bl->i_mapping);
+
+ /* Protect orig inodes against a truncate and make sure,
+ * that only 1 swap_inode_boot_loader is running. */
+ lock_two_nondirectories(inode, inode_bl);
+
+ /* Wait for all existing dio workers */
+ 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 journal_err_out;
+ }
+
+ /* Protect extent tree against block allocations via delalloc */
+ ext4_double_down_write_data_sem(inode, inode_bl);
+
+ if (inode_bl->i_nlink == 0) {
+ /* this inode has never been used as a BOOT_LOADER */
+ set_nlink(inode_bl, 1);
+ i_uid_write(inode_bl, 0);
+ i_gid_write(inode_bl, 0);
+ inode_bl->i_flags = 0;
+ ei_bl->i_flags = 0;
+ inode_set_iversion(inode_bl, 1);
+ i_size_write(inode_bl, 0);
+ 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));
+ }
+
+ swap_inode_data(inode, inode_bl);
+
+ inode->i_ctime = inode_bl->i_ctime = current_time(inode);
+
+ inode->i_generation = prandom_u32();
+ inode_bl->i_generation = prandom_u32();
+ reset_inode_seed(inode);
+ 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);
+ /* Revert all changes: */
+ swap_inode_data(inode, inode_bl);
+ ext4_mark_inode_dirty(handle, inode);
+ } else {
+ err = ext4_mark_inode_dirty(handle, inode_bl);
+ if (err < 0) {
+ ext4_warning(inode_bl->i_sb,
+ "couldn't mark inode #%lu dirty (err %d)",
+ inode_bl->i_ino, err);
+ /* Revert all changes: */
+ swap_inode_data(inode, inode_bl);
+ ext4_mark_inode_dirty(handle, inode);
+ ext4_mark_inode_dirty(handle, inode_bl);
+ }
+ }
+ ext4_journal_stop(handle);
+ ext4_double_up_write_data_sem(inode, inode_bl);
+
+journal_err_out:
+ unlock_two_nondirectories(inode, inode_bl);
+ iput(inode_bl);
+ return err;
+}
+
+#ifdef CONFIG_EXT4_FS_ENCRYPTION
+static int uuid_is_zero(__u8 u[16])
+{
+ int i;
+
+ for (i = 0; i < 16; i++)
+ if (u[i])
+ return 0;
+ return 1;
+}
+#endif
+
+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;
+ unsigned int jflag;
+
+ /* Is it quota file? Do not allow user to mess with it */
+ if (ext4_is_quota_file(inode))
+ goto flags_out;
+
+ oldflags = ei->i_flags;
+
+ /* The JOURNAL_DATA flag is modifiable only by root */
+ jflag = flags & EXT4_JOURNAL_DATA_FL;
+
+ /*
+ * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+ * the relevant capability.
+ *
+ * This test looks nicer. Thanks to Pauline Middelink
+ */
+ if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
+ if (!capable(CAP_LINUX_IMMUTABLE))
+ goto flags_out;
+ }
+
+ /*
+ * The JOURNAL_DATA flag can only be changed by
+ * the relevant capability.
+ */
+ if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
+ if (!capable(CAP_SYS_RESOURCE))
+ goto flags_out;
+ }
+ if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
+ migrate = 1;
+
+ if (flags & EXT4_EOFBLOCKS_FL) {
+ /* we don't support adding EOFBLOCKS flag */
+ if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
+ err = -EOPNOTSUPP;
+ goto flags_out;
+ }
+ } else if (oldflags & EXT4_EOFBLOCKS_FL) {
+ err = ext4_truncate(inode);
+ 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;
+
+ for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
+ if (!(mask & EXT4_FL_USER_MODIFIABLE))
+ continue;
+ /* These flags get special treatment later */
+ 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);
+ inode->i_ctime = current_time(inode);
+
+ err = ext4_mark_iloc_dirty(handle, inode, &iloc);
+flags_err:
+ ext4_journal_stop(handle);
+ if (err)
+ goto flags_out;
+
+ if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
+ /*
+ * Changes to the journaling mode can cause unsafe changes to
+ * S_DAX if we are using the DAX mount option.
+ */
+ if (test_opt(inode->i_sb, DAX)) {
+ err = -EBUSY;
+ goto flags_out;
+ }
+
+ err = ext4_change_inode_journal_flag(inode, jflag);
+ if (err)
+ goto flags_out;
+ }
+ if (migrate) {
+ if (flags & EXT4_EXTENTS_FL)
+ err = ext4_ext_migrate(inode);
+ else
+ err = ext4_ind_migrate(inode);
+ }
+
+flags_out:
+ return err;
+}
+
+#ifdef CONFIG_QUOTA
+static int ext4_ioctl_setproject(struct file *filp, __u32 projid)
+{
+ struct inode *inode = file_inode(filp);
+ 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;
+ /* 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_EXT4_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