1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 1991, 1992 Linus Torvalds
8 #include <linux/syscalls.h>
10 #include <linux/capability.h>
11 #include <linux/compat.h>
12 #include <linux/file.h>
14 #include <linux/security.h>
15 #include <linux/export.h>
16 #include <linux/uaccess.h>
17 #include <linux/writeback.h>
18 #include <linux/buffer_head.h>
19 #include <linux/falloc.h>
20 #include <linux/sched/signal.h>
21 #include <linux/fiemap.h>
22 #include <linux/mount.h>
23 #include <linux/fscrypt.h>
24 #include <linux/fileattr.h>
28 #include <asm/ioctls.h>
30 /* So that the fiemap access checks can't overflow on 32 bit machines. */
31 #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent))
34 * vfs_ioctl - call filesystem specific ioctl methods
35 * @filp: open file to invoke ioctl method on
36 * @cmd: ioctl command to execute
37 * @arg: command-specific argument for ioctl
39 * Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise
42 * Returns 0 on success, -errno on error.
44 long vfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
48 if (!filp->f_op->unlocked_ioctl)
51 error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
52 if (error == -ENOIOCTLCMD)
57 EXPORT_SYMBOL(vfs_ioctl);
59 static int ioctl_fibmap(struct file *filp, int __user *p)
61 struct inode *inode = file_inode(filp);
62 struct super_block *sb = inode->i_sb;
66 if (!capable(CAP_SYS_RAWIO))
69 error = get_user(ur_block, p);
77 error = bmap(inode, &block);
79 if (block > INT_MAX) {
81 pr_warn_ratelimited("[%s/%d] FS: %s File: %pD4 would truncate fibmap result\n",
82 current->comm, task_pid_nr(current),
91 if (put_user(ur_block, p))
98 * fiemap_fill_next_extent - Fiemap helper function
99 * @fieinfo: Fiemap context passed into ->fiemap
100 * @logical: Extent logical start offset, in bytes
101 * @phys: Extent physical start offset, in bytes
102 * @len: Extent length, in bytes
103 * @flags: FIEMAP_EXTENT flags that describe this extent
105 * Called from file system ->fiemap callback. Will populate extent
106 * info as passed in via arguments and copy to user memory. On
107 * success, extent count on fieinfo is incremented.
109 * Returns 0 on success, -errno on error, 1 if this was the last
110 * extent that will fit in user array.
112 #define SET_UNKNOWN_FLAGS (FIEMAP_EXTENT_DELALLOC)
113 #define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED)
114 #define SET_NOT_ALIGNED_FLAGS (FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE)
115 int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
116 u64 phys, u64 len, u32 flags)
118 struct fiemap_extent extent;
119 struct fiemap_extent __user *dest = fieinfo->fi_extents_start;
121 /* only count the extents */
122 if (fieinfo->fi_extents_max == 0) {
123 fieinfo->fi_extents_mapped++;
124 return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
127 if (fieinfo->fi_extents_mapped >= fieinfo->fi_extents_max)
130 if (flags & SET_UNKNOWN_FLAGS)
131 flags |= FIEMAP_EXTENT_UNKNOWN;
132 if (flags & SET_NO_UNMOUNTED_IO_FLAGS)
133 flags |= FIEMAP_EXTENT_ENCODED;
134 if (flags & SET_NOT_ALIGNED_FLAGS)
135 flags |= FIEMAP_EXTENT_NOT_ALIGNED;
137 memset(&extent, 0, sizeof(extent));
138 extent.fe_logical = logical;
139 extent.fe_physical = phys;
140 extent.fe_length = len;
141 extent.fe_flags = flags;
143 dest += fieinfo->fi_extents_mapped;
144 if (copy_to_user(dest, &extent, sizeof(extent)))
147 fieinfo->fi_extents_mapped++;
148 if (fieinfo->fi_extents_mapped == fieinfo->fi_extents_max)
150 return (flags & FIEMAP_EXTENT_LAST) ? 1 : 0;
152 EXPORT_SYMBOL(fiemap_fill_next_extent);
155 * fiemap_prep - check validity of requested flags for fiemap
156 * @inode: Inode to operate on
157 * @fieinfo: Fiemap context passed into ->fiemap
158 * @start: Start of the mapped range
159 * @len: Length of the mapped range, can be truncated by this function.
160 * @supported_flags: Set of fiemap flags that the file system understands
162 * This function must be called from each ->fiemap instance to validate the
163 * fiemap request against the file system parameters.
165 * Returns 0 on success, or a negative error on failure.
167 int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo,
168 u64 start, u64 *len, u32 supported_flags)
170 u64 maxbytes = inode->i_sb->s_maxbytes;
176 if (start > maxbytes)
180 * Shrink request scope to what the fs can actually handle.
182 if (*len > maxbytes || (maxbytes - *len) < start)
183 *len = maxbytes - start;
185 supported_flags |= FIEMAP_FLAG_SYNC;
186 supported_flags &= FIEMAP_FLAGS_COMPAT;
187 incompat_flags = fieinfo->fi_flags & ~supported_flags;
188 if (incompat_flags) {
189 fieinfo->fi_flags = incompat_flags;
193 if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC)
194 ret = filemap_write_and_wait(inode->i_mapping);
197 EXPORT_SYMBOL(fiemap_prep);
199 static int ioctl_fiemap(struct file *filp, struct fiemap __user *ufiemap)
201 struct fiemap fiemap;
202 struct fiemap_extent_info fieinfo = { 0, };
203 struct inode *inode = file_inode(filp);
206 if (!inode->i_op->fiemap)
209 if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap)))
212 if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS)
215 fieinfo.fi_flags = fiemap.fm_flags;
216 fieinfo.fi_extents_max = fiemap.fm_extent_count;
217 fieinfo.fi_extents_start = ufiemap->fm_extents;
219 error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start,
222 fiemap.fm_flags = fieinfo.fi_flags;
223 fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped;
224 if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap)))
230 static long ioctl_file_clone(struct file *dst_file, unsigned long srcfd,
231 u64 off, u64 olen, u64 destoff)
233 struct fd src_file = fdget(srcfd);
240 if (src_file.file->f_path.mnt != dst_file->f_path.mnt)
242 cloned = vfs_clone_file_range(src_file.file, off, dst_file, destoff,
246 else if (olen && cloned != olen)
255 static long ioctl_file_clone_range(struct file *file,
256 struct file_clone_range __user *argp)
258 struct file_clone_range args;
260 if (copy_from_user(&args, argp, sizeof(args)))
262 return ioctl_file_clone(file, args.src_fd, args.src_offset,
263 args.src_length, args.dest_offset);
268 static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
270 return (offset >> inode->i_blkbits);
273 static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
275 return (blk << inode->i_blkbits);
279 * __generic_block_fiemap - FIEMAP for block based inodes (no locking)
280 * @inode: the inode to map
281 * @fieinfo: the fiemap info struct that will be passed back to userspace
282 * @start: where to start mapping in the inode
283 * @len: how much space to map
284 * @get_block: the fs's get_block function
286 * This does FIEMAP for block based inodes. Basically it will just loop
287 * through get_block until we hit the number of extents we want to map, or we
288 * go past the end of the file and hit a hole.
290 * If it is possible to have data blocks beyond a hole past @inode->i_size, then
291 * please do not use this function, it will stop at the first unmapped block
294 * If you use this function directly, you need to do your own locking. Use
295 * generic_block_fiemap if you want the locking done for you.
297 static int __generic_block_fiemap(struct inode *inode,
298 struct fiemap_extent_info *fieinfo, loff_t start,
299 loff_t len, get_block_t *get_block)
301 struct buffer_head map_bh;
302 sector_t start_blk, last_blk;
303 loff_t isize = i_size_read(inode);
304 u64 logical = 0, phys = 0, size = 0;
305 u32 flags = FIEMAP_EXTENT_MERGED;
306 bool past_eof = false, whole_file = false;
309 ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_SYNC);
314 * Either the i_mutex or other appropriate locking needs to be held
315 * since we expect isize to not change at all through the duration of
324 * Some filesystems can't deal with being asked to map less than
325 * blocksize, so make sure our len is at least block length.
327 if (logical_to_blk(inode, len) == 0)
328 len = blk_to_logical(inode, 1);
330 start_blk = logical_to_blk(inode, start);
331 last_blk = logical_to_blk(inode, start + len - 1);
335 * we set b_size to the total size we want so it will map as
336 * many contiguous blocks as possible at once
338 memset(&map_bh, 0, sizeof(struct buffer_head));
341 ret = get_block(inode, start_blk, &map_bh, 0);
346 if (!buffer_mapped(&map_bh)) {
350 * We want to handle the case where there is an
351 * allocated block at the front of the file, and then
352 * nothing but holes up to the end of the file properly,
353 * to make sure that extent at the front gets properly
354 * marked with FIEMAP_EXTENT_LAST
357 blk_to_logical(inode, start_blk) >= isize)
361 * First hole after going past the EOF, this is our
364 if (past_eof && size) {
365 flags = FIEMAP_EXTENT_MERGED|FIEMAP_EXTENT_LAST;
366 ret = fiemap_fill_next_extent(fieinfo, logical,
370 ret = fiemap_fill_next_extent(fieinfo, logical,
375 /* if we have holes up to/past EOF then we're done */
376 if (start_blk > last_blk || past_eof || ret)
380 * We have gone over the length of what we wanted to
381 * map, and it wasn't the entire file, so add the extent
382 * we got last time and exit.
384 * This is for the case where say we want to map all the
385 * way up to the second to the last block in a file, but
386 * the last block is a hole, making the second to last
387 * block FIEMAP_EXTENT_LAST. In this case we want to
388 * see if there is a hole after the second to last block
389 * so we can mark it properly. If we found data after
390 * we exceeded the length we were requesting, then we
391 * are good to go, just add the extent to the fieinfo
394 if (start_blk > last_blk && !whole_file) {
395 ret = fiemap_fill_next_extent(fieinfo, logical,
402 * if size != 0 then we know we already have an extent
406 ret = fiemap_fill_next_extent(fieinfo, logical,
413 logical = blk_to_logical(inode, start_blk);
414 phys = blk_to_logical(inode, map_bh.b_blocknr);
415 size = map_bh.b_size;
416 flags = FIEMAP_EXTENT_MERGED;
418 start_blk += logical_to_blk(inode, size);
421 * If we are past the EOF, then we need to make sure as
422 * soon as we find a hole that the last extent we found
423 * is marked with FIEMAP_EXTENT_LAST
425 if (!past_eof && logical + size >= isize)
429 if (fatal_signal_pending(current)) {
436 /* If ret is 1 then we just hit the end of the extent array */
444 * generic_block_fiemap - FIEMAP for block based inodes
445 * @inode: The inode to map
446 * @fieinfo: The mapping information
447 * @start: The initial block to map
448 * @len: The length of the extect to attempt to map
449 * @get_block: The block mapping function for the fs
451 * Calls __generic_block_fiemap to map the inode, after taking
452 * the inode's mutex lock.
455 int generic_block_fiemap(struct inode *inode,
456 struct fiemap_extent_info *fieinfo, u64 start,
457 u64 len, get_block_t *get_block)
461 ret = __generic_block_fiemap(inode, fieinfo, start, len, get_block);
465 EXPORT_SYMBOL(generic_block_fiemap);
467 #endif /* CONFIG_BLOCK */
470 * This provides compatibility with legacy XFS pre-allocation ioctls
471 * which predate the fallocate syscall.
473 * Only the l_start, l_len and l_whence fields of the 'struct space_resv'
474 * are used here, rest are ignored.
476 static int ioctl_preallocate(struct file *filp, int mode, void __user *argp)
478 struct inode *inode = file_inode(filp);
479 struct space_resv sr;
481 if (copy_from_user(&sr, argp, sizeof(sr)))
484 switch (sr.l_whence) {
488 sr.l_start += filp->f_pos;
491 sr.l_start += i_size_read(inode);
497 return vfs_fallocate(filp, mode | FALLOC_FL_KEEP_SIZE, sr.l_start,
501 /* on ia32 l_start is on a 32-bit boundary */
502 #if defined CONFIG_COMPAT && defined(CONFIG_X86_64)
503 /* just account for different alignment */
504 static int compat_ioctl_preallocate(struct file *file, int mode,
505 struct space_resv_32 __user *argp)
507 struct inode *inode = file_inode(file);
508 struct space_resv_32 sr;
510 if (copy_from_user(&sr, argp, sizeof(sr)))
513 switch (sr.l_whence) {
517 sr.l_start += file->f_pos;
520 sr.l_start += i_size_read(inode);
526 return vfs_fallocate(file, mode | FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len);
530 static int file_ioctl(struct file *filp, unsigned int cmd, int __user *p)
534 return ioctl_fibmap(filp, p);
536 case FS_IOC_RESVSP64:
537 return ioctl_preallocate(filp, 0, p);
538 case FS_IOC_UNRESVSP:
539 case FS_IOC_UNRESVSP64:
540 return ioctl_preallocate(filp, FALLOC_FL_PUNCH_HOLE, p);
541 case FS_IOC_ZERO_RANGE:
542 return ioctl_preallocate(filp, FALLOC_FL_ZERO_RANGE, p);
548 static int ioctl_fionbio(struct file *filp, int __user *argp)
553 error = get_user(on, argp);
558 /* SunOS compatibility item. */
559 if (O_NONBLOCK != O_NDELAY)
562 spin_lock(&filp->f_lock);
564 filp->f_flags |= flag;
566 filp->f_flags &= ~flag;
567 spin_unlock(&filp->f_lock);
571 static int ioctl_fioasync(unsigned int fd, struct file *filp,
577 error = get_user(on, argp);
580 flag = on ? FASYNC : 0;
582 /* Did FASYNC state change ? */
583 if ((flag ^ filp->f_flags) & FASYNC) {
584 if (filp->f_op->fasync)
585 /* fasync() adjusts filp->f_flags */
586 error = filp->f_op->fasync(fd, filp, on);
590 return error < 0 ? error : 0;
593 static int ioctl_fsfreeze(struct file *filp)
595 struct super_block *sb = file_inode(filp)->i_sb;
597 if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
600 /* If filesystem doesn't support freeze feature, return. */
601 if (sb->s_op->freeze_fs == NULL && sb->s_op->freeze_super == NULL)
605 if (sb->s_op->freeze_super)
606 return sb->s_op->freeze_super(sb);
607 return freeze_super(sb);
610 static int ioctl_fsthaw(struct file *filp)
612 struct super_block *sb = file_inode(filp)->i_sb;
614 if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
618 if (sb->s_op->thaw_super)
619 return sb->s_op->thaw_super(sb);
620 return thaw_super(sb);
623 static int ioctl_file_dedupe_range(struct file *file,
624 struct file_dedupe_range __user *argp)
626 struct file_dedupe_range *same = NULL;
631 if (get_user(count, &argp->dest_count)) {
636 size = offsetof(struct file_dedupe_range __user, info[count]);
637 if (size > PAGE_SIZE) {
642 same = memdup_user(argp, size);
649 same->dest_count = count;
650 ret = vfs_dedupe_file_range(file, same);
654 ret = copy_to_user(argp, same, size);
664 * fileattr_fill_xflags - initialize fileattr with xflags
665 * @fa: fileattr pointer
666 * @xflags: FS_XFLAG_* flags
668 * Set ->fsx_xflags, ->fsx_valid and ->flags (translated xflags). All
669 * other fields are zeroed.
671 void fileattr_fill_xflags(struct fileattr *fa, u32 xflags)
673 memset(fa, 0, sizeof(*fa));
674 fa->fsx_valid = true;
675 fa->fsx_xflags = xflags;
676 if (fa->fsx_xflags & FS_XFLAG_IMMUTABLE)
677 fa->flags |= FS_IMMUTABLE_FL;
678 if (fa->fsx_xflags & FS_XFLAG_APPEND)
679 fa->flags |= FS_APPEND_FL;
680 if (fa->fsx_xflags & FS_XFLAG_SYNC)
681 fa->flags |= FS_SYNC_FL;
682 if (fa->fsx_xflags & FS_XFLAG_NOATIME)
683 fa->flags |= FS_NOATIME_FL;
684 if (fa->fsx_xflags & FS_XFLAG_NODUMP)
685 fa->flags |= FS_NODUMP_FL;
686 if (fa->fsx_xflags & FS_XFLAG_DAX)
687 fa->flags |= FS_DAX_FL;
688 if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
689 fa->flags |= FS_PROJINHERIT_FL;
691 EXPORT_SYMBOL(fileattr_fill_xflags);
694 * fileattr_fill_flags - initialize fileattr with flags
695 * @fa: fileattr pointer
696 * @flags: FS_*_FL flags
698 * Set ->flags, ->flags_valid and ->fsx_xflags (translated flags).
699 * All other fields are zeroed.
701 void fileattr_fill_flags(struct fileattr *fa, u32 flags)
703 memset(fa, 0, sizeof(*fa));
704 fa->flags_valid = true;
706 if (fa->flags & FS_SYNC_FL)
707 fa->fsx_xflags |= FS_XFLAG_SYNC;
708 if (fa->flags & FS_IMMUTABLE_FL)
709 fa->fsx_xflags |= FS_XFLAG_IMMUTABLE;
710 if (fa->flags & FS_APPEND_FL)
711 fa->fsx_xflags |= FS_XFLAG_APPEND;
712 if (fa->flags & FS_NODUMP_FL)
713 fa->fsx_xflags |= FS_XFLAG_NODUMP;
714 if (fa->flags & FS_NOATIME_FL)
715 fa->fsx_xflags |= FS_XFLAG_NOATIME;
716 if (fa->flags & FS_DAX_FL)
717 fa->fsx_xflags |= FS_XFLAG_DAX;
718 if (fa->flags & FS_PROJINHERIT_FL)
719 fa->fsx_xflags |= FS_XFLAG_PROJINHERIT;
721 EXPORT_SYMBOL(fileattr_fill_flags);
724 * vfs_fileattr_get - retrieve miscellaneous file attributes
725 * @dentry: the object to retrieve from
726 * @fa: fileattr pointer
728 * Call i_op->fileattr_get() callback, if exists.
730 * Return: 0 on success, or a negative error on failure.
732 int vfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
734 struct inode *inode = d_inode(dentry);
736 if (!inode->i_op->fileattr_get)
739 return inode->i_op->fileattr_get(dentry, fa);
741 EXPORT_SYMBOL(vfs_fileattr_get);
744 * copy_fsxattr_to_user - copy fsxattr to userspace.
745 * @fa: fileattr pointer
746 * @ufa: fsxattr user pointer
748 * Return: 0 on success, or -EFAULT on failure.
750 int copy_fsxattr_to_user(const struct fileattr *fa, struct fsxattr __user *ufa)
754 memset(&xfa, 0, sizeof(xfa));
755 xfa.fsx_xflags = fa->fsx_xflags;
756 xfa.fsx_extsize = fa->fsx_extsize;
757 xfa.fsx_nextents = fa->fsx_nextents;
758 xfa.fsx_projid = fa->fsx_projid;
759 xfa.fsx_cowextsize = fa->fsx_cowextsize;
761 if (copy_to_user(ufa, &xfa, sizeof(xfa)))
766 EXPORT_SYMBOL(copy_fsxattr_to_user);
768 static int copy_fsxattr_from_user(struct fileattr *fa,
769 struct fsxattr __user *ufa)
773 if (copy_from_user(&xfa, ufa, sizeof(xfa)))
776 fileattr_fill_xflags(fa, xfa.fsx_xflags);
777 fa->fsx_extsize = xfa.fsx_extsize;
778 fa->fsx_nextents = xfa.fsx_nextents;
779 fa->fsx_projid = xfa.fsx_projid;
780 fa->fsx_cowextsize = xfa.fsx_cowextsize;
786 * Generic function to check FS_IOC_FSSETXATTR/FS_IOC_SETFLAGS values and reject
787 * any invalid configurations.
789 * Note: must be called with inode lock held.
791 static int fileattr_set_prepare(struct inode *inode,
792 const struct fileattr *old_ma,
798 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
799 * the relevant capability.
801 if ((fa->flags ^ old_ma->flags) & (FS_APPEND_FL | FS_IMMUTABLE_FL) &&
802 !capable(CAP_LINUX_IMMUTABLE))
805 err = fscrypt_prepare_setflags(inode, old_ma->flags, fa->flags);
810 * Project Quota ID state is only allowed to change from within the init
811 * namespace. Enforce that restriction only if we are trying to change
812 * the quota ID state. Everything else is allowed in user namespaces.
814 if (current_user_ns() != &init_user_ns) {
815 if (old_ma->fsx_projid != fa->fsx_projid)
817 if ((old_ma->fsx_xflags ^ fa->fsx_xflags) &
818 FS_XFLAG_PROJINHERIT)
822 /* Check extent size hints. */
823 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(inode->i_mode))
826 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
827 !S_ISDIR(inode->i_mode))
830 if ((fa->fsx_xflags & FS_XFLAG_COWEXTSIZE) &&
831 !S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
835 * It is only valid to set the DAX flag on regular files and
836 * directories on filesystems.
838 if ((fa->fsx_xflags & FS_XFLAG_DAX) &&
839 !(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
842 /* Extent size hints of zero turn off the flags. */
843 if (fa->fsx_extsize == 0)
844 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
845 if (fa->fsx_cowextsize == 0)
846 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
852 * vfs_fileattr_set - change miscellaneous file attributes
853 * @mnt_userns: user namespace of the mount
854 * @dentry: the object to change
855 * @fa: fileattr pointer
857 * After verifying permissions, call i_op->fileattr_set() callback, if
860 * Verifying attributes involves retrieving current attributes with
861 * i_op->fileattr_get(), this also allows initializing attributes that have
862 * not been set by the caller to current values. Inode lock is held
863 * thoughout to prevent racing with another instance.
865 * Return: 0 on success, or a negative error on failure.
867 int vfs_fileattr_set(struct user_namespace *mnt_userns, struct dentry *dentry,
870 struct inode *inode = d_inode(dentry);
871 struct fileattr old_ma = {};
874 if (!inode->i_op->fileattr_set)
877 if (!inode_owner_or_capable(mnt_userns, inode))
881 err = vfs_fileattr_get(dentry, &old_ma);
883 /* initialize missing bits from old_ma */
884 if (fa->flags_valid) {
885 fa->fsx_xflags |= old_ma.fsx_xflags & ~FS_XFLAG_COMMON;
886 fa->fsx_extsize = old_ma.fsx_extsize;
887 fa->fsx_nextents = old_ma.fsx_nextents;
888 fa->fsx_projid = old_ma.fsx_projid;
889 fa->fsx_cowextsize = old_ma.fsx_cowextsize;
891 fa->flags |= old_ma.flags & ~FS_COMMON_FL;
893 err = fileattr_set_prepare(inode, &old_ma, fa);
895 err = inode->i_op->fileattr_set(mnt_userns, dentry, fa);
901 EXPORT_SYMBOL(vfs_fileattr_set);
903 static int ioctl_getflags(struct file *file, unsigned int __user *argp)
905 struct fileattr fa = { .flags_valid = true }; /* hint only */
908 err = vfs_fileattr_get(file->f_path.dentry, &fa);
910 err = put_user(fa.flags, argp);
914 static int ioctl_setflags(struct file *file, unsigned int __user *argp)
916 struct user_namespace *mnt_userns = file_mnt_user_ns(file);
917 struct dentry *dentry = file->f_path.dentry;
922 err = get_user(flags, argp);
924 err = mnt_want_write_file(file);
926 fileattr_fill_flags(&fa, flags);
927 err = vfs_fileattr_set(mnt_userns, dentry, &fa);
928 mnt_drop_write_file(file);
934 static int ioctl_fsgetxattr(struct file *file, void __user *argp)
936 struct fileattr fa = { .fsx_valid = true }; /* hint only */
939 err = vfs_fileattr_get(file->f_path.dentry, &fa);
941 err = copy_fsxattr_to_user(&fa, argp);
946 static int ioctl_fssetxattr(struct file *file, void __user *argp)
948 struct user_namespace *mnt_userns = file_mnt_user_ns(file);
949 struct dentry *dentry = file->f_path.dentry;
953 err = copy_fsxattr_from_user(&fa, argp);
955 err = mnt_want_write_file(file);
957 err = vfs_fileattr_set(mnt_userns, dentry, &fa);
958 mnt_drop_write_file(file);
965 * do_vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
966 * It's just a simple helper for sys_ioctl and compat_sys_ioctl.
968 * When you add any new common ioctls to the switches above and below,
969 * please ensure they have compatible arguments in compat mode.
971 static int do_vfs_ioctl(struct file *filp, unsigned int fd,
972 unsigned int cmd, unsigned long arg)
974 void __user *argp = (void __user *)arg;
975 struct inode *inode = file_inode(filp);
979 set_close_on_exec(fd, 1);
983 set_close_on_exec(fd, 0);
987 return ioctl_fionbio(filp, argp);
990 return ioctl_fioasync(fd, filp, argp);
993 if (S_ISDIR(inode->i_mode) || S_ISREG(inode->i_mode) ||
994 S_ISLNK(inode->i_mode)) {
995 loff_t res = inode_get_bytes(inode);
996 return copy_to_user(argp, &res, sizeof(res)) ?
1003 return ioctl_fsfreeze(filp);
1006 return ioctl_fsthaw(filp);
1009 return ioctl_fiemap(filp, argp);
1012 /* anon_bdev filesystems may not have a block size */
1013 if (!inode->i_sb->s_blocksize)
1016 return put_user(inode->i_sb->s_blocksize, (int __user *)argp);
1019 return ioctl_file_clone(filp, arg, 0, 0, 0);
1022 return ioctl_file_clone_range(filp, argp);
1025 return ioctl_file_dedupe_range(filp, argp);
1028 if (!S_ISREG(inode->i_mode))
1029 return vfs_ioctl(filp, cmd, arg);
1031 return put_user(i_size_read(inode) - filp->f_pos,
1032 (int __user *)argp);
1034 case FS_IOC_GETFLAGS:
1035 return ioctl_getflags(filp, argp);
1037 case FS_IOC_SETFLAGS:
1038 return ioctl_setflags(filp, argp);
1040 case FS_IOC_FSGETXATTR:
1041 return ioctl_fsgetxattr(filp, argp);
1043 case FS_IOC_FSSETXATTR:
1044 return ioctl_fssetxattr(filp, argp);
1047 if (S_ISREG(inode->i_mode))
1048 return file_ioctl(filp, cmd, argp);
1052 return -ENOIOCTLCMD;
1055 SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg)
1057 struct fd f = fdget(fd);
1063 error = security_file_ioctl(f.file, cmd, arg);
1067 error = do_vfs_ioctl(f.file, fd, cmd, arg);
1068 if (error == -ENOIOCTLCMD)
1069 error = vfs_ioctl(f.file, cmd, arg);
1076 #ifdef CONFIG_COMPAT
1078 * compat_ptr_ioctl - generic implementation of .compat_ioctl file operation
1080 * This is not normally called as a function, but instead set in struct
1081 * file_operations as
1083 * .compat_ioctl = compat_ptr_ioctl,
1085 * On most architectures, the compat_ptr_ioctl() just passes all arguments
1086 * to the corresponding ->ioctl handler. The exception is arch/s390, where
1087 * compat_ptr() clears the top bit of a 32-bit pointer value, so user space
1088 * pointers to the second 2GB alias the first 2GB, as is the case for
1089 * native 32-bit s390 user space.
1091 * The compat_ptr_ioctl() function must therefore be used only with ioctl
1092 * functions that either ignore the argument or pass a pointer to a
1093 * compatible data type.
1095 * If any ioctl command handled by fops->unlocked_ioctl passes a plain
1096 * integer instead of a pointer, or any of the passed data types
1097 * is incompatible between 32-bit and 64-bit architectures, a proper
1098 * handler is required instead of compat_ptr_ioctl.
1100 long compat_ptr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1102 if (!file->f_op->unlocked_ioctl)
1103 return -ENOIOCTLCMD;
1105 return file->f_op->unlocked_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
1107 EXPORT_SYMBOL(compat_ptr_ioctl);
1109 COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
1110 compat_ulong_t, arg)
1112 struct fd f = fdget(fd);
1118 /* RED-PEN how should LSM module know it's handling 32bit? */
1119 error = security_file_ioctl(f.file, cmd, arg);
1124 /* FICLONE takes an int argument, so don't use compat_ptr() */
1126 error = ioctl_file_clone(f.file, arg, 0, 0, 0);
1129 #if defined(CONFIG_X86_64)
1130 /* these get messy on amd64 due to alignment differences */
1131 case FS_IOC_RESVSP_32:
1132 case FS_IOC_RESVSP64_32:
1133 error = compat_ioctl_preallocate(f.file, 0, compat_ptr(arg));
1135 case FS_IOC_UNRESVSP_32:
1136 case FS_IOC_UNRESVSP64_32:
1137 error = compat_ioctl_preallocate(f.file, FALLOC_FL_PUNCH_HOLE,
1140 case FS_IOC_ZERO_RANGE_32:
1141 error = compat_ioctl_preallocate(f.file, FALLOC_FL_ZERO_RANGE,
1147 * These access 32-bit values anyway so no further handling is
1150 case FS_IOC32_GETFLAGS:
1151 case FS_IOC32_SETFLAGS:
1152 cmd = (cmd == FS_IOC32_GETFLAGS) ?
1153 FS_IOC_GETFLAGS : FS_IOC_SETFLAGS;
1156 * everything else in do_vfs_ioctl() takes either a compatible
1157 * pointer argument or no argument -- call it with a modified
1161 error = do_vfs_ioctl(f.file, fd, cmd,
1162 (unsigned long)compat_ptr(arg));
1163 if (error != -ENOIOCTLCMD)
1166 if (f.file->f_op->compat_ioctl)
1167 error = f.file->f_op->compat_ioctl(f.file, cmd, arg);
1168 if (error == -ENOIOCTLCMD)