1 files changed, 394 insertions, 308 deletions

diff --git a/fs/ioctl.c b/fs/ioctl.c
index fd507fb460f8..1c152c2b1b67 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  linux/fs/ioctl.c
  *
@@ -7,6 +8,7 @@
 #include <linux/syscalls.h>
 #include <linux/mm.h>
 #include <linux/capability.h>
+#include <linux/compat.h>
 #include <linux/file.h>
 #include <linux/fs.h>
 #include <linux/security.h>
@@ -15,6 +17,13 @@
 #include <linux/writeback.h>
 #include <linux/buffer_head.h>
 #include <linux/falloc.h>
+#include <linux/sched/signal.h>
+#include <linux/fiemap.h>
+#include <linux/mount.h>
+#include <linux/fscrypt.h>
+#include <linux/fileattr.h>
+
+#include "internal.h"
 
 #include <asm/ioctls.h>
 
@@ -32,12 +41,11 @@
  *
  * Returns 0 on success, -errno on error.
  */
-static long vfs_ioctl(struct file *filp, unsigned int cmd,
-		      unsigned long arg)
+static int vfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	int error = -ENOTTY;
 
-	if (!filp->f_op || !filp->f_op->unlocked_ioctl)
+	if (!filp->f_op->unlocked_ioctl)
 		goto out;
 
 	error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
@@ -49,19 +57,40 @@ static long vfs_ioctl(struct file *filp, unsigned int cmd,
 
 static int ioctl_fibmap(struct file *filp, int __user *p)
 {
-	struct address_space *mapping = filp->f_mapping;
-	int res, block;
+	struct inode *inode = file_inode(filp);
+	struct super_block *sb = inode->i_sb;
+	int error, ur_block;
+	sector_t block;
 
-	/* do we support this mess? */
-	if (!mapping->a_ops->bmap)
-		return -EINVAL;
 	if (!capable(CAP_SYS_RAWIO))
 		return -EPERM;
-	res = get_user(block, p);
-	if (res)
-		return res;
-	res = mapping->a_ops->bmap(mapping, block);
-	return put_user(res, p);
+
+	error = get_user(ur_block, p);
+	if (error)
+		return error;
+
+	if (ur_block < 0)
+		return -EINVAL;
+
+	block = ur_block;
+	error = bmap(inode, &block);
+
+	if (block > INT_MAX) {
+		error = -ERANGE;
+		pr_warn_ratelimited("[%s/%d] FS: %s File: %pD4 would truncate fibmap result\n",
+				    current->comm, task_pid_nr(current),
+				    sb->s_id, filp);
+	}
+
+	if (error)
+		ur_block = 0;
+	else
+		ur_block = block;
+
+	if (put_user(ur_block, p))
+		error = -EFAULT;
+
+	return error;
 }
 
 /**
@@ -79,9 +108,6 @@ static int ioctl_fibmap(struct file *filp, int __user *p)
  * Returns 0 on success, -errno on error, 1 if this was the last
  * extent that will fit in user array.
  */
-#define SET_UNKNOWN_FLAGS	(FIEMAP_EXTENT_DELALLOC)
-#define SET_NO_UNMOUNTED_IO_FLAGS	(FIEMAP_EXTENT_DATA_ENCRYPTED)
-#define SET_NOT_ALIGNED_FLAGS	(FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE)
 int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
 			    u64 phys, u64 len, u32 flags)
 {
@@ -97,6 +123,10 @@ int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
 	if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max)
 		return 1;
 
+#define SET_UNKNOWN_FLAGS	(FIEMAP_EXTENT_DELALLOC)
+#define SET_NO_UNMOUNTED_IO_FLAGS	(FIEMAP_EXTENT_DATA_ENCRYPTED)
+#define SET_NOT_ALIGNED_FLAGS	(FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE)
+
 	if (flags & SET_UNKNOWN_FLAGS)
 		flags |= FIEMAP_EXTENT_UNKNOWN;
 	if (flags & SET_NO_UNMOUNTED_IO_FLAGS)
@@ -122,62 +152,55 @@ int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
 EXPORT_SYMBOL(fiemap_fill_next_extent);
 
 /**
- * fiemap_check_flags - check validity of requested flags for fiemap
+ * fiemap_prep - check validity of requested flags for fiemap
+ * @inode:	Inode to operate on
  * @fieinfo:	Fiemap context passed into ->fiemap
- * @fs_flags:	Set of fiemap flags that the file system understands
+ * @start:	Start of the mapped range
+ * @len:	Length of the mapped range, can be truncated by this function.
+ * @supported_flags:	Set of fiemap flags that the file system understands
  *
- * Called from file system ->fiemap callback. This will compute the
- * intersection of valid fiemap flags and those that the fs supports. That
- * value is then compared against the user supplied flags. In case of bad user
- * flags, the invalid values will be written into the fieinfo structure, and
- * -EBADR is returned, which tells ioctl_fiemap() to return those values to
- * userspace. For this reason, a return code of -EBADR should be preserved.
+ * This function must be called from each ->fiemap instance to validate the
+ * fiemap request against the file system parameters.
  *
- * Returns 0 on success, -EBADR on bad flags.
+ * Returns 0 on success, or a negative error on failure.
  */
-int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags)
+int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo,
+		u64 start, u64 *len, u32 supported_flags)
 {
+	u64 maxbytes = inode->i_sb->s_maxbytes;
 	u32 incompat_flags;
+	int ret = 0;
 
-	incompat_flags = fieinfo->fi_flags & ~(FIEMAP_FLAGS_COMPAT & fs_flags);
-	if (incompat_flags) {
-		fieinfo->fi_flags = incompat_flags;
-		return -EBADR;
-	}
-	return 0;
-}
-EXPORT_SYMBOL(fiemap_check_flags);
-
-static int fiemap_check_ranges(struct super_block *sb,
-			       u64 start, u64 len, u64 *new_len)
-{
-	u64 maxbytes = (u64) sb->s_maxbytes;
-
-	*new_len = len;
-
-	if (len == 0)
+	if (*len == 0)
 		return -EINVAL;
-
-	if (start > maxbytes)
+	if (start >= maxbytes)
 		return -EFBIG;
 
 	/*
 	 * Shrink request scope to what the fs can actually handle.
 	 */
-	if (len > maxbytes || (maxbytes - len) < start)
-		*new_len = maxbytes - start;
+	if (*len > maxbytes || (maxbytes - *len) < start)
+		*len = maxbytes - start;
+
+	supported_flags |= FIEMAP_FLAG_SYNC;
+	supported_flags &= FIEMAP_FLAGS_COMPAT;
+	incompat_flags = fieinfo->fi_flags & ~supported_flags;
+	if (incompat_flags) {
+		fieinfo->fi_flags = incompat_flags;
+		return -EBADR;
+	}
 
-	return 0;
+	if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC)
+		ret = filemap_write_and_wait(inode->i_mapping);
+	return ret;
 }
+EXPORT_SYMBOL(fiemap_prep);
 
-static int ioctl_fiemap(struct file *filp, unsigned long arg)
+static int ioctl_fiemap(struct file *filp, struct fiemap __user *ufiemap)
 {
 	struct fiemap fiemap;
-	struct fiemap __user *ufiemap = (struct fiemap __user *) arg;
 	struct fiemap_extent_info fieinfo = { 0, };
 	struct inode *inode = file_inode(filp);
-	struct super_block *sb = inode->i_sb;
-	u64 len;
 	int error;
 
 	if (!inode->i_op->fiemap)
@@ -189,24 +212,13 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg)
 	if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
 		return -EINVAL;
 
-	error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length,
-				    &len);
-	if (error)
-		return error;
-
 	fieinfo.fi_flags = fiemap.fm_flags;
 	fieinfo.fi_extents_max = fiemap.fm_extent_count;
 	fieinfo.fi_extents_start = ufiemap->fm_extents;
 
-	if (fiemap.fm_extent_count != 0 &&
-	    !access_ok(VERIFY_WRITE, fieinfo.fi_extents_start,
-		       fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
-		return -EFAULT;
-
-	if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
-		filemap_write_and_wait(inode->i_mapping);
+	error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start,
+			fiemap.fm_length);
 
-	error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start, len);
 	fiemap.fm_flags = fieinfo.fi_flags;
 	fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
 	if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
@@ -215,205 +227,36 @@ static int ioctl_fiemap(struct file *filp, unsigned long arg)
 	return error;
 }
 
-#ifdef CONFIG_BLOCK
-
-static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
-{
-	return (offset >> inode->i_blkbits);
-}
-
-static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
+static int ioctl_file_clone(struct file *dst_file, unsigned long srcfd,
+			    u64 off, u64 olen, u64 destoff)
 {
-	return (blk << inode->i_blkbits);
-}
-
-/**
- * __generic_block_fiemap - FIEMAP for block based inodes (no locking)
- * @inode: the inode to map
- * @fieinfo: the fiemap info struct that will be passed back to userspace
- * @start: where to start mapping in the inode
- * @len: how much space to map
- * @get_block: the fs's get_block function
- *
- * This does FIEMAP for block based inodes.  Basically it will just loop
- * through get_block until we hit the number of extents we want to map, or we
- * go past the end of the file and hit a hole.
- *
- * If it is possible to have data blocks beyond a hole past @inode->i_size, then
- * please do not use this function, it will stop at the first unmapped block
- * beyond i_size.
- *
- * If you use this function directly, you need to do your own locking. Use
- * generic_block_fiemap if you want the locking done for you.
- */
-
-int __generic_block_fiemap(struct inode *inode,
-			   struct fiemap_extent_info *fieinfo, loff_t start,
-			   loff_t len, get_block_t *get_block)
-{
-	struct buffer_head map_bh;
-	sector_t start_blk, last_blk;
-	loff_t isize = i_size_read(inode);
-	u64 logical = 0, phys = 0, size = 0;
-	u32 flags = FIEMAP_EXTENT_MERGED;
-	bool past_eof = false, whole_file = false;
-	int ret = 0;
-
-	ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
-	if (ret)
-		return ret;
-
-	/*
-	 * Either the i_mutex or other appropriate locking needs to be held
-	 * since we expect isize to not change at all through the duration of
-	 * this call.
-	 */
-	if (len >= isize) {
-		whole_file = true;
-		len = isize;
-	}
-
-	/*
-	 * Some filesystems can't deal with being asked to map less than
-	 * blocksize, so make sure our len is at least block length.
-	 */
-	if (logical_to_blk(inode, len) == 0)
-		len = blk_to_logical(inode, 1);
-
-	start_blk = logical_to_blk(inode, start);
-	last_blk = logical_to_blk(inode, start + len - 1);
-
-	do {
-		/*
-		 * we set b_size to the total size we want so it will map as
-		 * many contiguous blocks as possible at once
-		 */
-		memset(&map_bh, 0, sizeof(struct buffer_head));
-		map_bh.b_size = len;
-
-		ret = get_block(inode, start_blk, &map_bh, 0);
-		if (ret)
-			break;
-
-		/* HOLE */
-		if (!buffer_mapped(&map_bh)) {
-			start_blk++;
-
-			/*
-			 * We want to handle the case where there is an
-			 * allocated block at the front of the file, and then
-			 * nothing but holes up to the end of the file properly,
-			 * to make sure that extent at the front gets properly
-			 * marked with FIEMAP_EXTENT_LAST
-			 */
-			if (!past_eof &&
-			    blk_to_logical(inode, start_blk) >= isize)
-				past_eof = 1;
-
-			/*
-			 * First hole after going past the EOF, this is our
-			 * last extent
-			 */
-			if (past_eof && size) {
-				flags = FIEMAP_EXTENT_MERGED|FIEMAP_EXTENT_LAST;
-				ret = fiemap_fill_next_extent(fieinfo, logical,
-							      phys, size,
-							      flags);
-			} else if (size) {
-				ret = fiemap_fill_next_extent(fieinfo, logical,
-							      phys, size, flags);
-				size = 0;
-			}
-
-			/* if we have holes up to/past EOF then we're done */
-			if (start_blk > last_blk || past_eof || ret)
-				break;
-		} else {
-			/*
-			 * We have gone over the length of what we wanted to
-			 * map, and it wasn't the entire file, so add the extent
-			 * we got last time and exit.
-			 *
-			 * This is for the case where say we want to map all the
-			 * way up to the second to the last block in a file, but
-			 * the last block is a hole, making the second to last
-			 * block FIEMAP_EXTENT_LAST.  In this case we want to
-			 * see if there is a hole after the second to last block
-			 * so we can mark it properly.  If we found data after
-			 * we exceeded the length we were requesting, then we
-			 * are good to go, just add the extent to the fieinfo
-			 * and break
-			 */
-			if (start_blk > last_blk && !whole_file) {
-				ret = fiemap_fill_next_extent(fieinfo, logical,
-							      phys, size,
-							      flags);
-				break;
-			}
-
-			/*
-			 * if size != 0 then we know we already have an extent
-			 * to add, so add it.
-			 */
-			if (size) {
-				ret = fiemap_fill_next_extent(fieinfo, logical,
-							      phys, size,
-							      flags);
-				if (ret)
-					break;
-			}
-
-			logical = blk_to_logical(inode, start_blk);
-			phys = blk_to_logical(inode, map_bh.b_blocknr);
-			size = map_bh.b_size;
-			flags = FIEMAP_EXTENT_MERGED;
-
-			start_blk += logical_to_blk(inode, size);
-
-			/*
-			 * If we are past the EOF, then we need to make sure as
-			 * soon as we find a hole that the last extent we found
-			 * is marked with FIEMAP_EXTENT_LAST
-			 */
-			if (!past_eof && logical + size >= isize)
-				past_eof = true;
-		}
-		cond_resched();
-	} while (1);
+	CLASS(fd, src_file)(srcfd);
+	loff_t cloned;
+	int ret;
 
-	/* If ret is 1 then we just hit the end of the extent array */
-	if (ret == 1)
+	if (fd_empty(src_file))
+		return -EBADF;
+	cloned = vfs_clone_file_range(fd_file(src_file), off, dst_file, destoff,
+				      olen, 0);
+	if (cloned < 0)
+		ret = cloned;
+	else if (olen && cloned != olen)
+		ret = -EINVAL;
+	else
 		ret = 0;
-
 	return ret;
 }
-EXPORT_SYMBOL(__generic_block_fiemap);
-
-/**
- * generic_block_fiemap - FIEMAP for block based inodes
- * @inode: The inode to map
- * @fieinfo: The mapping information
- * @start: The initial block to map
- * @len: The length of the extect to attempt to map
- * @get_block: The block mapping function for the fs
- *
- * Calls __generic_block_fiemap to map the inode, after taking
- * the inode's mutex lock.
- */
 
-int generic_block_fiemap(struct inode *inode,
-			 struct fiemap_extent_info *fieinfo, u64 start,
-			 u64 len, get_block_t *get_block)
+static int ioctl_file_clone_range(struct file *file,
+				  struct file_clone_range __user *argp)
 {
-	int ret;
-	mutex_lock(&inode->i_mutex);
-	ret = __generic_block_fiemap(inode, fieinfo, start, len, get_block);
-	mutex_unlock(&inode->i_mutex);
-	return ret;
-}
-EXPORT_SYMBOL(generic_block_fiemap);
+	struct file_clone_range args;
 
-#endif  /*  CONFIG_BLOCK  */
+	if (copy_from_user(&args, argp, sizeof(args)))
+		return -EFAULT;
+	return ioctl_file_clone(file, args.src_fd, args.src_offset,
+				args.src_length, args.dest_offset);
+}
 
 /*
  * This provides compatibility with legacy XFS pre-allocation ioctls
@@ -422,7 +265,7 @@ EXPORT_SYMBOL(generic_block_fiemap);
  * Only the l_start, l_len and l_whence fields of the 'struct space_resv'
  * are used here, rest are ignored.
  */
-int ioctl_preallocate(struct file *filp, void __user *argp)
+static int ioctl_preallocate(struct file *filp, int mode, void __user *argp)
 {
 	struct inode *inode = file_inode(filp);
 	struct space_resv sr;
@@ -443,26 +286,55 @@ int ioctl_preallocate(struct file *filp, void __user *argp)
 		return -EINVAL;
 	}
 
-	return do_fallocate(filp, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len);
+	return vfs_fallocate(filp, mode | FALLOC_FL_KEEP_SIZE, sr.l_start,
+			sr.l_len);
 }
 
-static int file_ioctl(struct file *filp, unsigned int cmd,
-		unsigned long arg)
+/* on ia32 l_start is on a 32-bit boundary */
+#if defined CONFIG_COMPAT && defined(CONFIG_X86_64)
+/* just account for different alignment */
+static int compat_ioctl_preallocate(struct file *file, int mode,
+				    struct space_resv_32 __user *argp)
 {
-	struct inode *inode = file_inode(filp);
-	int __user *p = (int __user *)arg;
+	struct inode *inode = file_inode(file);
+	struct space_resv_32 sr;
 
+	if (copy_from_user(&sr, argp, sizeof(sr)))
+		return -EFAULT;
+
+	switch (sr.l_whence) {
+	case SEEK_SET:
+		break;
+	case SEEK_CUR:
+		sr.l_start += file->f_pos;
+		break;
+	case SEEK_END:
+		sr.l_start += i_size_read(inode);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return vfs_fallocate(file, mode | FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len);
+}
+#endif
+
+static int file_ioctl(struct file *filp, unsigned int cmd, int __user *p)
+{
 	switch (cmd) {
 	case FIBMAP:
 		return ioctl_fibmap(filp, p);
-	case FIONREAD:
-		return put_user(i_size_read(inode) - filp->f_pos, p);
 	case FS_IOC_RESVSP:
 	case FS_IOC_RESVSP64:
-		return ioctl_preallocate(filp, p);
+		return ioctl_preallocate(filp, 0, p);
+	case FS_IOC_UNRESVSP:
+	case FS_IOC_UNRESVSP64:
+		return ioctl_preallocate(filp, FALLOC_FL_PUNCH_HOLE, p);
+	case FS_IOC_ZERO_RANGE:
+		return ioctl_preallocate(filp, FALLOC_FL_ZERO_RANGE, p);
 	}
 
-	return vfs_ioctl(filp, cmd, arg);
+	return -ENOIOCTLCMD;
 }
 
 static int ioctl_fionbio(struct file *filp, int __user *argp)
@@ -501,7 +373,7 @@ static int ioctl_fioasync(unsigned int fd, struct file *filp,
 
 	/* Did FASYNC state change ? */
 	if ((flag ^ filp->f_flags) & FASYNC) {
-		if (filp->f_op && filp->f_op->fasync)
+		if (filp->f_op->fasync)
 			/* fasync() adjusts filp->f_flags */
 			error = filp->f_op->fasync(fd, filp, on);
 		else
@@ -514,103 +386,317 @@ static int ioctl_fsfreeze(struct file *filp)
 {
 	struct super_block *sb = file_inode(filp)->i_sb;
 
-	if (!capable(CAP_SYS_ADMIN))
+	if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
 		return -EPERM;
 
 	/* If filesystem doesn't support freeze feature, return. */
-	if (sb->s_op->freeze_fs == NULL)
+	if (sb->s_op->freeze_fs == NULL && sb->s_op->freeze_super == NULL)
 		return -EOPNOTSUPP;
 
 	/* Freeze */
-	return freeze_super(sb);
+	if (sb->s_op->freeze_super)
+		return sb->s_op->freeze_super(sb, FREEZE_HOLDER_USERSPACE, NULL);
+	return freeze_super(sb, FREEZE_HOLDER_USERSPACE, NULL);
 }
 
 static int ioctl_fsthaw(struct file *filp)
 {
 	struct super_block *sb = file_inode(filp)->i_sb;
 
-	if (!capable(CAP_SYS_ADMIN))
+	if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
 		return -EPERM;
 
 	/* Thaw */
-	return thaw_super(sb);
+	if (sb->s_op->thaw_super)
+		return sb->s_op->thaw_super(sb, FREEZE_HOLDER_USERSPACE, NULL);
+	return thaw_super(sb, FREEZE_HOLDER_USERSPACE, NULL);
+}
+
+static int ioctl_file_dedupe_range(struct file *file,
+				   struct file_dedupe_range __user *argp)
+{
+	struct file_dedupe_range *same = NULL;
+	int ret;
+	unsigned long size;
+	u16 count;
+
+	if (get_user(count, &argp->dest_count)) {
+		ret = -EFAULT;
+		goto out;
+	}
+
+	size = struct_size(same, info, count);
+	if (size > PAGE_SIZE) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	same = memdup_user(argp, size);
+	if (IS_ERR(same)) {
+		ret = PTR_ERR(same);
+		same = NULL;
+		goto out;
+	}
+
+	same->dest_count = count;
+	ret = vfs_dedupe_file_range(file, same);
+	if (ret)
+		goto out;
+
+	ret = copy_to_user(argp, same, size);
+	if (ret)
+		ret = -EFAULT;
+
+out:
+	kfree(same);
+	return ret;
+}
+
+static int ioctl_getfsuuid(struct file *file, void __user *argp)
+{
+	struct super_block *sb = file_inode(file)->i_sb;
+	struct fsuuid2 u = { .len = sb->s_uuid_len, };
+
+	if (!sb->s_uuid_len)
+		return -ENOTTY;
+
+	memcpy(&u.uuid[0], &sb->s_uuid, sb->s_uuid_len);
+
+	return copy_to_user(argp, &u, sizeof(u)) ? -EFAULT : 0;
+}
+
+static int ioctl_get_fs_sysfs_path(struct file *file, void __user *argp)
+{
+	struct super_block *sb = file_inode(file)->i_sb;
+
+	if (!strlen(sb->s_sysfs_name))
+		return -ENOTTY;
+
+	struct fs_sysfs_path u = {};
+
+	u.len = scnprintf(u.name, sizeof(u.name), "%s/%s", sb->s_type->name, sb->s_sysfs_name);
+
+	return copy_to_user(argp, &u, sizeof(u)) ? -EFAULT : 0;
 }
 
 /*
- * When you add any new common ioctls to the switches above and below
- * please update compat_sys_ioctl() too.
- *
  * do_vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
  * It's just a simple helper for sys_ioctl and compat_sys_ioctl.
+ *
+ * When you add any new common ioctls to the switches above and below,
+ * please ensure they have compatible arguments in compat mode.
+ *
+ * The LSM mailing list should also be notified of any command additions or
+ * changes, as specific LSMs may be affected.
  */
-int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
-	     unsigned long arg)
+static int do_vfs_ioctl(struct file *filp, unsigned int fd,
+			unsigned int cmd, unsigned long arg)
 {
-	int error = 0;
-	int __user *argp = (int __user *)arg;
+	void __user *argp = (void __user *)arg;
 	struct inode *inode = file_inode(filp);
 
 	switch (cmd) {
 	case FIOCLEX:
 		set_close_on_exec(fd, 1);
-		break;
+		return 0;
 
 	case FIONCLEX:
 		set_close_on_exec(fd, 0);
-		break;
+		return 0;
 
 	case FIONBIO:
-		error = ioctl_fionbio(filp, argp);
-		break;
+		return ioctl_fionbio(filp, argp);
 
 	case FIOASYNC:
-		error = ioctl_fioasync(fd, filp, argp);
-		break;
+		return ioctl_fioasync(fd, filp, argp);
 
 	case FIOQSIZE:
-		if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode) ||
+		if (S_ISDIR(inode->i_mode) ||
+		    (S_ISREG(inode->i_mode) && !IS_ANON_FILE(inode)) ||
 		    S_ISLNK(inode->i_mode)) {
 			loff_t res = inode_get_bytes(inode);
-			error = copy_to_user(argp, &res, sizeof(res)) ?
-					-EFAULT : 0;
-		} else
-			error = -ENOTTY;
-		break;
+			return copy_to_user(argp, &res, sizeof(res)) ?
+					    -EFAULT : 0;
+		}
+
+		return -ENOTTY;
 
 	case FIFREEZE:
-		error = ioctl_fsfreeze(filp);
-		break;
+		return ioctl_fsfreeze(filp);
 
 	case FITHAW:
-		error = ioctl_fsthaw(filp);
-		break;
+		return ioctl_fsthaw(filp);
 
 	case FS_IOC_FIEMAP:
-		return ioctl_fiemap(filp, arg);
+		return ioctl_fiemap(filp, argp);
 
 	case FIGETBSZ:
-		return put_user(inode->i_sb->s_blocksize, argp);
+		/* anon_bdev filesystems may not have a block size */
+		if (!inode->i_sb->s_blocksize)
+			return -EINVAL;
+
+		return put_user(inode->i_sb->s_blocksize, (int __user *)argp);
+
+	case FICLONE:
+		return ioctl_file_clone(filp, arg, 0, 0, 0);
+
+	case FICLONERANGE:
+		return ioctl_file_clone_range(filp, argp);
+
+	case FIDEDUPERANGE:
+		return ioctl_file_dedupe_range(filp, argp);
+
+	case FIONREAD:
+		if (!S_ISREG(inode->i_mode) || IS_ANON_FILE(inode))
+			return vfs_ioctl(filp, cmd, arg);
+
+		return put_user(i_size_read(inode) - filp->f_pos,
+				(int __user *)argp);
+
+	case FS_IOC_GETFLAGS:
+		return ioctl_getflags(filp, argp);
+
+	case FS_IOC_SETFLAGS:
+		return ioctl_setflags(filp, argp);
+
+	case FS_IOC_FSGETXATTR:
+		return ioctl_fsgetxattr(filp, argp);
+
+	case FS_IOC_FSSETXATTR:
+		return ioctl_fssetxattr(filp, argp);
+
+	case FS_IOC_GETFSUUID:
+		return ioctl_getfsuuid(filp, argp);
+
+	case FS_IOC_GETFSSYSFSPATH:
+		return ioctl_get_fs_sysfs_path(filp, argp);
 
 	default:
-		if (S_ISREG(inode->i_mode))
-			error = file_ioctl(filp, cmd, arg);
-		else
-			error = vfs_ioctl(filp, cmd, arg);
+		if (S_ISREG(inode->i_mode) && !IS_ANON_FILE(inode))
+			return file_ioctl(filp, cmd, argp);
 		break;
 	}
-	return error;
+
+	return -ENOIOCTLCMD;
 }
 
 SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
 {
+	CLASS(fd, f)(fd);
+	int error;
+
+	if (fd_empty(f))
+		return -EBADF;
+
+	error = security_file_ioctl(fd_file(f), cmd, arg);
+	if (error)
+		return error;
+
+	error = do_vfs_ioctl(fd_file(f), fd, cmd, arg);
+	if (error == -ENOIOCTLCMD)
+		error = vfs_ioctl(fd_file(f), cmd, arg);
+
+	return error;
+}
+
+#ifdef CONFIG_COMPAT
+/**
+ * compat_ptr_ioctl - generic implementation of .compat_ioctl file operation
+ * @file: The file to operate on.
+ * @cmd: The ioctl command number.
+ * @arg: The argument to the ioctl.
+ *
+ * This is not normally called as a function, but instead set in struct
+ * file_operations as
+ *
+ *     .compat_ioctl = compat_ptr_ioctl,
+ *
+ * On most architectures, the compat_ptr_ioctl() just passes all arguments
+ * to the corresponding ->ioctl handler. The exception is arch/s390, where
+ * compat_ptr() clears the top bit of a 32-bit pointer value, so user space
+ * pointers to the second 2GB alias the first 2GB, as is the case for
+ * native 32-bit s390 user space.
+ *
+ * The compat_ptr_ioctl() function must therefore be used only with ioctl
+ * functions that either ignore the argument or pass a pointer to a
+ * compatible data type.
+ *
+ * If any ioctl command handled by fops->unlocked_ioctl passes a plain
+ * integer instead of a pointer, or any of the passed data types
+ * is incompatible between 32-bit and 64-bit architectures, a proper
+ * handler is required instead of compat_ptr_ioctl.
+ */
+long compat_ptr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	if (!file->f_op->unlocked_ioctl)
+		return -ENOIOCTLCMD;
+
+	return file->f_op->unlocked_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+EXPORT_SYMBOL(compat_ptr_ioctl);
+
+COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
+		       compat_ulong_t, arg)
+{
+	CLASS(fd, f)(fd);
 	int error;
-	struct fd f = fdget(fd);
 
-	if (!f.file)
+	if (fd_empty(f))
 		return -EBADF;
-	error = security_file_ioctl(f.file, cmd, arg);
-	if (!error)
-		error = do_vfs_ioctl(f.file, fd, cmd, arg);
-	fdput(f);
+
+	error = security_file_ioctl_compat(fd_file(f), cmd, arg);
+	if (error)
+		return error;
+
+	switch (cmd) {
+	/* FICLONE takes an int argument, so don't use compat_ptr() */
+	case FICLONE:
+		error = ioctl_file_clone(fd_file(f), arg, 0, 0, 0);
+		break;
+
+#if defined(CONFIG_X86_64)
+	/* these get messy on amd64 due to alignment differences */
+	case FS_IOC_RESVSP_32:
+	case FS_IOC_RESVSP64_32:
+		error = compat_ioctl_preallocate(fd_file(f), 0, compat_ptr(arg));
+		break;
+	case FS_IOC_UNRESVSP_32:
+	case FS_IOC_UNRESVSP64_32:
+		error = compat_ioctl_preallocate(fd_file(f), FALLOC_FL_PUNCH_HOLE,
+				compat_ptr(arg));
+		break;
+	case FS_IOC_ZERO_RANGE_32:
+		error = compat_ioctl_preallocate(fd_file(f), FALLOC_FL_ZERO_RANGE,
+				compat_ptr(arg));
+		break;
+#endif
+
+	/*
+	 * These access 32-bit values anyway so no further handling is
+	 * necessary.
+	 */
+	case FS_IOC32_GETFLAGS:
+	case FS_IOC32_SETFLAGS:
+		cmd = (cmd == FS_IOC32_GETFLAGS) ?
+			FS_IOC_GETFLAGS : FS_IOC_SETFLAGS;
+		fallthrough;
+	/*
+	 * everything else in do_vfs_ioctl() takes either a compatible
+	 * pointer argument or no argument -- call it with a modified
+	 * argument.
+	 */
+	default:
+		error = do_vfs_ioctl(fd_file(f), fd, cmd,
+				     (unsigned long)compat_ptr(arg));
+		if (error != -ENOIOCTLCMD)
+			break;
+
+		if (fd_file(f)->f_op->compat_ioctl)
+			error = fd_file(f)->f_op->compat_ioctl(fd_file(f), cmd, arg);
+		if (error == -ENOIOCTLCMD)
+			error = -ENOTTY;
+		break;
+	}
 	return error;
 }
+#endif