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- // SPDX-License-Identifier: GPL-2.0
- /*
- * linux/fs/ioctl.c
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- */
- #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>
- #include <linux/export.h>
- #include <linux/uaccess.h>
- #include <linux/writeback.h>
- #include <linux/buffer_head.h>
- #include <linux/falloc.h>
- #include <linux/sched/signal.h>
- #include <linux/fiemap.h>
- #include "internal.h"
- #include <asm/ioctls.h>
- /* So that the fiemap access checks can't overflow on 32 bit machines. */
- #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
- /**
- * vfs_ioctl - call filesystem specific ioctl methods
- * @filp: open file to invoke ioctl method on
- * @cmd: ioctl command to execute
- * @arg: command-specific argument for ioctl
- *
- * Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise
- * returns -ENOTTY.
- *
- * Returns 0 on success, -errno on error.
- */
- long vfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
- {
- int error = -ENOTTY;
- if (!filp->f_op->unlocked_ioctl)
- goto out;
- error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
- if (error == -ENOIOCTLCMD)
- error = -ENOTTY;
- out:
- return error;
- }
- EXPORT_SYMBOL(vfs_ioctl);
- static int ioctl_fibmap(struct file *filp, int __user *p)
- {
- struct inode *inode = file_inode(filp);
- struct super_block *sb = inode->i_sb;
- int error, ur_block;
- sector_t block;
- if (!capable(CAP_SYS_RAWIO))
- return -EPERM;
- 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;
- }
- /**
- * fiemap_fill_next_extent - Fiemap helper function
- * @fieinfo: Fiemap context passed into ->fiemap
- * @logical: Extent logical start offset, in bytes
- * @phys: Extent physical start offset, in bytes
- * @len: Extent length, in bytes
- * @flags: FIEMAP_EXTENT flags that describe this extent
- *
- * Called from file system ->fiemap callback. Will populate extent
- * info as passed in via arguments and copy to user memory. On
- * success, extent count on fieinfo is incremented.
- *
- * 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)
- {
- struct fiemap_extent extent;
- struct fiemap_extent __user *dest = fieinfo->fi_extents_start;
- /* only count the extents */
- if (fieinfo->fi_extents_max == 0) {
- fieinfo->fi_extents_mapped++;
- return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
- }
- if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max)
- return 1;
- if (flags & SET_UNKNOWN_FLAGS)
- flags |= FIEMAP_EXTENT_UNKNOWN;
- if (flags & SET_NO_UNMOUNTED_IO_FLAGS)
- flags |= FIEMAP_EXTENT_ENCODED;
- if (flags & SET_NOT_ALIGNED_FLAGS)
- flags |= FIEMAP_EXTENT_NOT_ALIGNED;
- memset(&extent, 0, sizeof(extent));
- extent.fe_logical = logical;
- extent.fe_physical = phys;
- extent.fe_length = len;
- extent.fe_flags = flags;
- dest += fieinfo->fi_extents_mapped;
- if (copy_to_user(dest, &extent, sizeof(extent)))
- return -EFAULT;
- fieinfo->fi_extents_mapped++;
- if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max)
- return 1;
- return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
- }
- EXPORT_SYMBOL_NS(fiemap_fill_next_extent, ANDROID_GKI_VFS_EXPORT_ONLY);
- /**
- * fiemap_prep - check validity of requested flags for fiemap
- * @inode: Inode to operate on
- * @fieinfo: Fiemap context passed into ->fiemap
- * @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
- *
- * This function must be called from each ->fiemap instance to validate the
- * fiemap request against the file system parameters.
- *
- * Returns 0 on success, or a negative error on failure.
- */
- 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;
- if (*len == 0)
- return -EINVAL;
- if (start > maxbytes)
- return -EFBIG;
- /*
- * Shrink request scope to what the fs can actually handle.
- */
- 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;
- }
- if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC)
- ret = filemap_write_and_wait(inode->i_mapping);
- return ret;
- }
- EXPORT_SYMBOL_NS(fiemap_prep, ANDROID_GKI_VFS_EXPORT_ONLY);
- static int ioctl_fiemap(struct file *filp, struct fiemap __user *ufiemap)
- {
- struct fiemap fiemap;
- struct fiemap_extent_info fieinfo = { 0, };
- struct inode *inode = file_inode(filp);
- int error;
- if (!inode->i_op->fiemap)
- return -EOPNOTSUPP;
- 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 = inode->i_op->fiemap(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 long ioctl_file_clone(struct file *dst_file, unsigned long srcfd,
- u64 off, u64 olen, u64 destoff)
- {
- struct fd src_file = fdget(srcfd);
- loff_t cloned;
- int ret;
- if (!src_file.file)
- return -EBADF;
- ret = -EXDEV;
- if (src_file.file->f_path.mnt != dst_file->f_path.mnt)
- goto fdput;
- cloned = vfs_clone_file_range(src_file.file, off, dst_file, destoff,
- olen, 0);
- if (cloned < 0)
- ret = cloned;
- else if (olen && cloned != olen)
- ret = -EINVAL;
- else
- ret = 0;
- fdput:
- fdput(src_file);
- return ret;
- }
- static long ioctl_file_clone_range(struct file *file,
- struct file_clone_range __user *argp)
- {
- struct file_clone_range args;
- 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);
- }
- #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)
- {
- 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.
- */
- static 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_prep(inode, fieinfo, start, &len, 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();
- if (fatal_signal_pending(current)) {
- ret = -EINTR;
- break;
- }
- } while (1);
- /* If ret is 1 then we just hit the end of the extent array */
- if (ret == 1)
- ret = 0;
- return ret;
- }
- /**
- * 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)
- {
- int ret;
- inode_lock(inode);
- ret = __generic_block_fiemap(inode, fieinfo, start, len, get_block);
- inode_unlock(inode);
- return ret;
- }
- EXPORT_SYMBOL(generic_block_fiemap);
- #endif /* CONFIG_BLOCK */
- /*
- * This provides compatibility with legacy XFS pre-allocation ioctls
- * which predate the fallocate syscall.
- *
- * Only the l_start, l_len and l_whence fields of the 'struct space_resv'
- * are used here, rest are ignored.
- */
- static int ioctl_preallocate(struct file *filp, int mode, void __user *argp)
- {
- struct inode *inode = file_inode(filp);
- struct space_resv 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 += filp->f_pos;
- break;
- case SEEK_END:
- sr.l_start += i_size_read(inode);
- break;
- default:
- return -EINVAL;
- }
- return vfs_fallocate(filp, mode | FALLOC_FL_KEEP_SIZE, sr.l_start,
- sr.l_len);
- }
- /* 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(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 FS_IOC_RESVSP:
- case FS_IOC_RESVSP64:
- 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 -ENOIOCTLCMD;
- }
- static int ioctl_fionbio(struct file *filp, int __user *argp)
- {
- unsigned int flag;
- int on, error;
- error = get_user(on, argp);
- if (error)
- return error;
- flag = O_NONBLOCK;
- #ifdef __sparc__
- /* SunOS compatibility item. */
- if (O_NONBLOCK != O_NDELAY)
- flag |= O_NDELAY;
- #endif
- spin_lock(&filp->f_lock);
- if (on)
- filp->f_flags |= flag;
- else
- filp->f_flags &= ~flag;
- spin_unlock(&filp->f_lock);
- return error;
- }
- static int ioctl_fioasync(unsigned int fd, struct file *filp,
- int __user *argp)
- {
- unsigned int flag;
- int on, error;
- error = get_user(on, argp);
- if (error)
- return error;
- flag = on ? FASYNC : 0;
- /* Did FASYNC state change ? */
- if ((flag ^ filp->f_flags) & FASYNC) {
- if (filp->f_op->fasync)
- /* fasync() adjusts filp->f_flags */
- error = filp->f_op->fasync(fd, filp, on);
- else
- error = -ENOTTY;
- }
- return error < 0 ? error : 0;
- }
- static int ioctl_fsfreeze(struct file *filp)
- {
- struct super_block *sb = file_inode(filp)->i_sb;
- 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 && sb->s_op->freeze_super == NULL)
- return -EOPNOTSUPP;
- /* Freeze */
- if (sb->s_op->freeze_super)
- return sb->s_op->freeze_super(sb);
- return freeze_super(sb);
- }
- static int ioctl_fsthaw(struct file *filp)
- {
- struct super_block *sb = file_inode(filp)->i_sb;
- if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
- return -EPERM;
- /* Thaw */
- if (sb->s_op->thaw_super)
- return sb->s_op->thaw_super(sb);
- return thaw_super(sb);
- }
- 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 = offsetof(struct file_dedupe_range __user, 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;
- }
- /*
- * 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.
- */
- static int do_vfs_ioctl(struct file *filp, unsigned int fd,
- unsigned int cmd, unsigned long arg)
- {
- void __user *argp = (void __user *)arg;
- struct inode *inode = file_inode(filp);
- switch (cmd) {
- case FIOCLEX:
- set_close_on_exec(fd, 1);
- return 0;
- case FIONCLEX:
- set_close_on_exec(fd, 0);
- return 0;
- case FIONBIO:
- return ioctl_fionbio(filp, argp);
- case FIOASYNC:
- return ioctl_fioasync(fd, filp, argp);
- case FIOQSIZE:
- if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode) ||
- S_ISLNK(inode->i_mode)) {
- loff_t res = inode_get_bytes(inode);
- return copy_to_user(argp, &res, sizeof(res)) ?
- -EFAULT : 0;
- }
- return -ENOTTY;
- case FIFREEZE:
- return ioctl_fsfreeze(filp);
- case FITHAW:
- return ioctl_fsthaw(filp);
- case FS_IOC_FIEMAP:
- return ioctl_fiemap(filp, argp);
- case FIGETBSZ:
- /* 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))
- return vfs_ioctl(filp, cmd, arg);
- return put_user(i_size_read(inode) - filp->f_pos,
- (int __user *)argp);
- default:
- if (S_ISREG(inode->i_mode))
- return file_ioctl(filp, cmd, argp);
- break;
- }
- return -ENOIOCTLCMD;
- }
- SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
- {
- struct fd f = fdget(fd);
- int error;
- if (!f.file)
- return -EBADF;
- error = security_file_ioctl(f.file, cmd, arg);
- if (error)
- goto out;
- error = do_vfs_ioctl(f.file, fd, cmd, arg);
- if (error == -ENOIOCTLCMD)
- error = vfs_ioctl(f.file, cmd, arg);
- out:
- fdput(f);
- return error;
- }
- #ifdef CONFIG_COMPAT
- /**
- * compat_ptr_ioctl - generic implementation of .compat_ioctl file operation
- *
- * 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)
- {
- struct fd f = fdget(fd);
- int error;
- if (!f.file)
- return -EBADF;
- /* RED-PEN how should LSM module know it's handling 32bit? */
- error = security_file_ioctl(f.file, cmd, arg);
- if (error)
- goto out;
- switch (cmd) {
- /* FICLONE takes an int argument, so don't use compat_ptr() */
- case FICLONE:
- error = ioctl_file_clone(f.file, 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(f.file, 0, compat_ptr(arg));
- break;
- case FS_IOC_UNRESVSP_32:
- case FS_IOC_UNRESVSP64_32:
- error = compat_ioctl_preallocate(f.file, FALLOC_FL_PUNCH_HOLE,
- compat_ptr(arg));
- break;
- case FS_IOC_ZERO_RANGE_32:
- error = compat_ioctl_preallocate(f.file, FALLOC_FL_ZERO_RANGE,
- compat_ptr(arg));
- break;
- #endif
- /*
- * 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(f.file, fd, cmd,
- (unsigned long)compat_ptr(arg));
- if (error != -ENOIOCTLCMD)
- break;
- if (f.file->f_op->compat_ioctl)
- error = f.file->f_op->compat_ioctl(f.file, cmd, arg);
- if (error == -ENOIOCTLCMD)
- error = -ENOTTY;
- break;
- }
- out:
- fdput(f);
- return error;
- }
- #endif
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