![Linus Torvalds](/assets/img/avatar_default.png)
< XFS has gained super CoW powers! > ---------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || Included in this update: - unshare range (FALLOC_FL_UNSHARE) support for fallocate - copy-on-write extent size hints (FS_XFLAG_COWEXTSIZE) for fsxattr interface - shared extent support for XFS - copy-on-write support for shared extents - copy_file_range support - clone_file_range support (implements reflink) - dedupe_file_range support - defrag support for reverse mapping enabled filesystems -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJX/hrZAAoJEK3oKUf0dfodpwcQAKkTerNPhhDcthqWUJ2+jC7w JIuhKUg2GYojJhIJ4+Ue1knmuBeIusda+PzGls+6gdy7GDGdux/esRIJSe1W7A5G RNeumiSKVX5iYsZNUEX35O2a/SwUM1Sm5mcIFs4CxUwIRwE/cayNby6vrlVExvz7 Ns6YYOI2bldUHLsxedg8MLG0it1JGTADB9gwGgb98bxQ3bD/UBn3TF9xTlj+ZH22 ebnWsogSJOnUigOOSGeaQsmy1pJAhRIhvt+f481KuZak1pdQcK2feL4RcKw0NpNt 15LCYRqX6RexC684VYgJZxXB4EKyfS2Bma71q41A7dz1x36kw7+wG18xasBqU++p GZwwL6si02rIGPMz1oD8xxZ0F97ADCGRmkgUHsCJKbP5UmGiP08K6GEN3osr5hAN xAmn9AxcprXVnV3WmnFxpBeWY/qCEsvSQqJuKSThYqAilqUc8wN2u5g/eEpE6mmg KEEhzaq5P4ovS/HOIQJWdBu1j5E9Mg2o/ncy87Q6uE+9Fa5AAP6GBWOtGcMwdFSU adbN7dqjgoHMyNHFrmePqyJYtOZ2hZovDlVndxnYysl5ZBfiBEEDISmr+x6KcSlo 3kyOltYQLjEVu1sLOT3COCddn0jt5Lr1QhGeVepnrMlU2E1h4461viCNMDinJRIp OYoMOS+J83G2FEFwgXYM =Sa+Y -----END PGP SIGNATURE----- Merge tag 'xfs-reflink-for-linus-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs < XFS has gained super CoW powers! > ---------------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || Pull XFS support for shared data extents from Dave Chinner: "This is the second part of the XFS updates for this merge cycle. This pullreq contains the new shared data extents feature for XFS. Given the complexity and size of this change I am expecting - like the addition of reverse mapping last cycle - that there will be some follow-up bug fixes and cleanups around the -rc3 stage for issues that I'm sure will show up once the code hits a wider userbase. What it is: At the most basic level we are simply adding shared data extents to XFS - i.e. a single extent on disk can now have multiple owners. To do this we have to add new on-disk features to both track the shared extents and the number of times they've been shared. This is done by the new "refcount" btree that sits in every allocation group. When we share or unshare an extent, this tree gets updated. Along with this new tree, the reverse mapping tree needs to be updated to track each owner or a shared extent. This also needs to be updated ever share/unshare operation. These interactions at extent allocation and freeing time have complex ordering and recovery constraints, so there's a significant amount of new intent-based transaction code to ensure that operations are performed atomically from both the runtime and integrity/crash recovery perspectives. We also need to break sharing when writes hit a shared extent - this is where the new copy-on-write implementation comes in. We allocate new storage and copy the original data along with the overwrite data into the new location. We only do this for data as we don't share metadata at all - each inode has it's own metadata that tracks the shared data extents, the extents undergoing CoW and it's own private extents. Of course, being XFS, nothing is simple - we use delayed allocation for CoW similar to how we use it for normal writes. ENOSPC is a significant issue here - we build on the reservation code added in 4.8-rc1 with the reverse mapping feature to ensure we don't get spurious ENOSPC issues part way through a CoW operation. These mechanisms also help minimise fragmentation due to repeated CoW operations. To further reduce fragmentation overhead, we've also introduced a CoW extent size hint, which indicates how large a region we should allocate when we execute a CoW operation. With all this functionality in place, we can hook up .copy_file_range, .clone_file_range and .dedupe_file_range and we gain all the capabilities of reflink and other vfs provided functionality that enable manipulation to shared extents. We also added a fallocate mode that explicitly unshares a range of a file, which we implemented as an explicit CoW of all the shared extents in a file. As such, it's a huge chunk of new functionality with new on-disk format features and internal infrastructure. It warns at mount time as an experimental feature and that it may eat data (as we do with all new on-disk features until they stabilise). We have not released userspace suport for it yet - userspace support currently requires download from Darrick's xfsprogs repo and build from source, so the access to this feature is really developer/tester only at this point. Initial userspace support will be released at the same time the kernel with this code in it is released. The new code causes 5-6 new failures with xfstests - these aren't serious functional failures but things the output of tests changing slightly due to perturbations in layouts, space usage, etc. OTOH, we've added 150+ new tests to xfstests that specifically exercise this new functionality so it's got far better test coverage than any functionality we've previously added to XFS. Darrick has done a pretty amazing job getting us to this stage, and special mention also needs to go to Christoph (review, testing, improvements and bug fixes) and Brian (caught several intricate bugs during review) for the effort they've also put in. Summary: - unshare range (FALLOC_FL_UNSHARE) support for fallocate - copy-on-write extent size hints (FS_XFLAG_COWEXTSIZE) for fsxattr interface - shared extent support for XFS - copy-on-write support for shared extents - copy_file_range support - clone_file_range support (implements reflink) - dedupe_file_range support - defrag support for reverse mapping enabled filesystems" * tag 'xfs-reflink-for-linus-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (71 commits) xfs: convert COW blocks to real blocks before unwritten extent conversion xfs: rework refcount cow recovery error handling xfs: clear reflink flag if setting realtime flag xfs: fix error initialization xfs: fix label inaccuracies xfs: remove isize check from unshare operation xfs: reduce stack usage of _reflink_clear_inode_flag xfs: check inode reflink flag before calling reflink functions xfs: implement swapext for rmap filesystems xfs: refactor swapext code xfs: various swapext cleanups xfs: recognize the reflink feature bit xfs: simulate per-AG reservations being critically low xfs: don't mix reflink and DAX mode for now xfs: check for invalid inode reflink flags xfs: set a default CoW extent size of 32 blocks xfs: convert unwritten status of reverse mappings for shared files xfs: use interval query for rmap alloc operations on shared files xfs: add shared rmap map/unmap/convert log item types xfs: increase log reservations for reflink ...
1990 lines
45 KiB
C
1990 lines
45 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_ioctl.h"
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#include "xfs_alloc.h"
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#include "xfs_rtalloc.h"
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#include "xfs_itable.h"
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#include "xfs_error.h"
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#include "xfs_attr.h"
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#include "xfs_bmap.h"
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#include "xfs_bmap_util.h"
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#include "xfs_fsops.h"
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#include "xfs_discard.h"
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#include "xfs_quota.h"
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#include "xfs_export.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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#include "xfs_symlink.h"
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#include "xfs_trans.h"
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#include "xfs_pnfs.h"
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#include "xfs_acl.h"
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#include <linux/capability.h>
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#include <linux/dcache.h>
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#include <linux/mount.h>
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#include <linux/namei.h>
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#include <linux/pagemap.h>
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#include <linux/slab.h>
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#include <linux/exportfs.h>
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/*
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* xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
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* a file or fs handle.
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*
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* XFS_IOC_PATH_TO_FSHANDLE
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* returns fs handle for a mount point or path within that mount point
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* XFS_IOC_FD_TO_HANDLE
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* returns full handle for a FD opened in user space
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* XFS_IOC_PATH_TO_HANDLE
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* returns full handle for a path
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*/
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int
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xfs_find_handle(
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unsigned int cmd,
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xfs_fsop_handlereq_t *hreq)
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{
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int hsize;
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xfs_handle_t handle;
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struct inode *inode;
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struct fd f = {NULL};
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struct path path;
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int error;
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struct xfs_inode *ip;
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if (cmd == XFS_IOC_FD_TO_HANDLE) {
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f = fdget(hreq->fd);
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if (!f.file)
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return -EBADF;
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inode = file_inode(f.file);
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} else {
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error = user_lpath((const char __user *)hreq->path, &path);
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if (error)
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return error;
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inode = d_inode(path.dentry);
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}
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ip = XFS_I(inode);
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/*
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* We can only generate handles for inodes residing on a XFS filesystem,
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* and only for regular files, directories or symbolic links.
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*/
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error = -EINVAL;
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if (inode->i_sb->s_magic != XFS_SB_MAGIC)
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goto out_put;
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error = -EBADF;
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if (!S_ISREG(inode->i_mode) &&
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!S_ISDIR(inode->i_mode) &&
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!S_ISLNK(inode->i_mode))
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goto out_put;
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memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
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if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
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/*
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* This handle only contains an fsid, zero the rest.
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*/
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memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
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hsize = sizeof(xfs_fsid_t);
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} else {
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handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
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sizeof(handle.ha_fid.fid_len);
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handle.ha_fid.fid_pad = 0;
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handle.ha_fid.fid_gen = inode->i_generation;
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handle.ha_fid.fid_ino = ip->i_ino;
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hsize = XFS_HSIZE(handle);
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}
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error = -EFAULT;
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if (copy_to_user(hreq->ohandle, &handle, hsize) ||
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copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
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goto out_put;
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error = 0;
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out_put:
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if (cmd == XFS_IOC_FD_TO_HANDLE)
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fdput(f);
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else
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path_put(&path);
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return error;
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}
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/*
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* No need to do permission checks on the various pathname components
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* as the handle operations are privileged.
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*/
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STATIC int
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xfs_handle_acceptable(
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void *context,
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struct dentry *dentry)
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{
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return 1;
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}
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/*
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* Convert userspace handle data into a dentry.
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*/
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struct dentry *
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xfs_handle_to_dentry(
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struct file *parfilp,
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void __user *uhandle,
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u32 hlen)
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{
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xfs_handle_t handle;
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struct xfs_fid64 fid;
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/*
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* Only allow handle opens under a directory.
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*/
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if (!S_ISDIR(file_inode(parfilp)->i_mode))
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return ERR_PTR(-ENOTDIR);
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if (hlen != sizeof(xfs_handle_t))
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return ERR_PTR(-EINVAL);
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if (copy_from_user(&handle, uhandle, hlen))
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return ERR_PTR(-EFAULT);
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if (handle.ha_fid.fid_len !=
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sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
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return ERR_PTR(-EINVAL);
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memset(&fid, 0, sizeof(struct fid));
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fid.ino = handle.ha_fid.fid_ino;
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fid.gen = handle.ha_fid.fid_gen;
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return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
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FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
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xfs_handle_acceptable, NULL);
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}
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STATIC struct dentry *
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xfs_handlereq_to_dentry(
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struct file *parfilp,
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xfs_fsop_handlereq_t *hreq)
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{
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return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
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}
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int
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xfs_open_by_handle(
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struct file *parfilp,
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xfs_fsop_handlereq_t *hreq)
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{
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const struct cred *cred = current_cred();
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int error;
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int fd;
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int permflag;
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struct file *filp;
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struct inode *inode;
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struct dentry *dentry;
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fmode_t fmode;
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struct path path;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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dentry = xfs_handlereq_to_dentry(parfilp, hreq);
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if (IS_ERR(dentry))
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return PTR_ERR(dentry);
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inode = d_inode(dentry);
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/* Restrict xfs_open_by_handle to directories & regular files. */
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if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
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error = -EPERM;
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goto out_dput;
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}
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#if BITS_PER_LONG != 32
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hreq->oflags |= O_LARGEFILE;
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#endif
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permflag = hreq->oflags;
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fmode = OPEN_FMODE(permflag);
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if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
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(fmode & FMODE_WRITE) && IS_APPEND(inode)) {
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error = -EPERM;
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goto out_dput;
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}
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if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
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error = -EPERM;
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goto out_dput;
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}
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/* Can't write directories. */
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if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
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error = -EISDIR;
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goto out_dput;
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}
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fd = get_unused_fd_flags(0);
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if (fd < 0) {
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error = fd;
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goto out_dput;
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}
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path.mnt = parfilp->f_path.mnt;
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path.dentry = dentry;
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filp = dentry_open(&path, hreq->oflags, cred);
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dput(dentry);
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if (IS_ERR(filp)) {
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put_unused_fd(fd);
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return PTR_ERR(filp);
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}
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if (S_ISREG(inode->i_mode)) {
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filp->f_flags |= O_NOATIME;
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filp->f_mode |= FMODE_NOCMTIME;
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}
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fd_install(fd, filp);
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return fd;
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out_dput:
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dput(dentry);
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return error;
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}
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int
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xfs_readlink_by_handle(
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struct file *parfilp,
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xfs_fsop_handlereq_t *hreq)
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{
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struct dentry *dentry;
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__u32 olen;
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int error;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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dentry = xfs_handlereq_to_dentry(parfilp, hreq);
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if (IS_ERR(dentry))
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return PTR_ERR(dentry);
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/* Restrict this handle operation to symlinks only. */
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if (!d_inode(dentry)->i_op->readlink) {
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error = -EINVAL;
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goto out_dput;
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}
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if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
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error = -EFAULT;
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goto out_dput;
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}
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error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen);
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out_dput:
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dput(dentry);
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return error;
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}
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int
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xfs_set_dmattrs(
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xfs_inode_t *ip,
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u_int evmask,
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u_int16_t state)
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{
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xfs_mount_t *mp = ip->i_mount;
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xfs_trans_t *tp;
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int error;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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if (XFS_FORCED_SHUTDOWN(mp))
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return -EIO;
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error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
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if (error)
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return error;
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xfs_ilock(ip, XFS_ILOCK_EXCL);
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xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
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ip->i_d.di_dmevmask = evmask;
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ip->i_d.di_dmstate = state;
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xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
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error = xfs_trans_commit(tp);
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return error;
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}
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STATIC int
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xfs_fssetdm_by_handle(
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struct file *parfilp,
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void __user *arg)
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{
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int error;
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struct fsdmidata fsd;
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xfs_fsop_setdm_handlereq_t dmhreq;
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struct dentry *dentry;
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if (!capable(CAP_MKNOD))
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return -EPERM;
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if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
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return -EFAULT;
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error = mnt_want_write_file(parfilp);
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if (error)
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return error;
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dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
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if (IS_ERR(dentry)) {
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mnt_drop_write_file(parfilp);
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return PTR_ERR(dentry);
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}
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if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
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error = -EPERM;
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goto out;
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}
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if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
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error = -EFAULT;
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goto out;
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}
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error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
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fsd.fsd_dmstate);
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out:
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mnt_drop_write_file(parfilp);
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dput(dentry);
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return error;
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}
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STATIC int
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xfs_attrlist_by_handle(
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struct file *parfilp,
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void __user *arg)
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{
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int error = -ENOMEM;
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attrlist_cursor_kern_t *cursor;
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struct xfs_fsop_attrlist_handlereq __user *p = arg;
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xfs_fsop_attrlist_handlereq_t al_hreq;
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struct dentry *dentry;
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char *kbuf;
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if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
|
|
return -EFAULT;
|
|
if (al_hreq.buflen < sizeof(struct attrlist) ||
|
|
al_hreq.buflen > XFS_XATTR_LIST_MAX)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Reject flags, only allow namespaces.
|
|
*/
|
|
if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
|
|
return -EINVAL;
|
|
|
|
dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
|
|
if (IS_ERR(dentry))
|
|
return PTR_ERR(dentry);
|
|
|
|
kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
|
|
if (!kbuf)
|
|
goto out_dput;
|
|
|
|
cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
|
|
error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
|
|
al_hreq.flags, cursor);
|
|
if (error)
|
|
goto out_kfree;
|
|
|
|
if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
|
|
error = -EFAULT;
|
|
goto out_kfree;
|
|
}
|
|
|
|
if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
|
|
error = -EFAULT;
|
|
|
|
out_kfree:
|
|
kmem_free(kbuf);
|
|
out_dput:
|
|
dput(dentry);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_attrmulti_attr_get(
|
|
struct inode *inode,
|
|
unsigned char *name,
|
|
unsigned char __user *ubuf,
|
|
__uint32_t *len,
|
|
__uint32_t flags)
|
|
{
|
|
unsigned char *kbuf;
|
|
int error = -EFAULT;
|
|
|
|
if (*len > XFS_XATTR_SIZE_MAX)
|
|
return -EINVAL;
|
|
kbuf = kmem_zalloc_large(*len, KM_SLEEP);
|
|
if (!kbuf)
|
|
return -ENOMEM;
|
|
|
|
error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
|
|
if (error)
|
|
goto out_kfree;
|
|
|
|
if (copy_to_user(ubuf, kbuf, *len))
|
|
error = -EFAULT;
|
|
|
|
out_kfree:
|
|
kmem_free(kbuf);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_attrmulti_attr_set(
|
|
struct inode *inode,
|
|
unsigned char *name,
|
|
const unsigned char __user *ubuf,
|
|
__uint32_t len,
|
|
__uint32_t flags)
|
|
{
|
|
unsigned char *kbuf;
|
|
int error;
|
|
|
|
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
|
|
return -EPERM;
|
|
if (len > XFS_XATTR_SIZE_MAX)
|
|
return -EINVAL;
|
|
|
|
kbuf = memdup_user(ubuf, len);
|
|
if (IS_ERR(kbuf))
|
|
return PTR_ERR(kbuf);
|
|
|
|
error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
|
|
if (!error)
|
|
xfs_forget_acl(inode, name, flags);
|
|
kfree(kbuf);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_attrmulti_attr_remove(
|
|
struct inode *inode,
|
|
unsigned char *name,
|
|
__uint32_t flags)
|
|
{
|
|
int error;
|
|
|
|
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
|
|
return -EPERM;
|
|
error = xfs_attr_remove(XFS_I(inode), name, flags);
|
|
if (!error)
|
|
xfs_forget_acl(inode, name, flags);
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_attrmulti_by_handle(
|
|
struct file *parfilp,
|
|
void __user *arg)
|
|
{
|
|
int error;
|
|
xfs_attr_multiop_t *ops;
|
|
xfs_fsop_attrmulti_handlereq_t am_hreq;
|
|
struct dentry *dentry;
|
|
unsigned int i, size;
|
|
unsigned char *attr_name;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
|
|
return -EFAULT;
|
|
|
|
/* overflow check */
|
|
if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
|
|
return -E2BIG;
|
|
|
|
dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
|
|
if (IS_ERR(dentry))
|
|
return PTR_ERR(dentry);
|
|
|
|
error = -E2BIG;
|
|
size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
|
|
if (!size || size > 16 * PAGE_SIZE)
|
|
goto out_dput;
|
|
|
|
ops = memdup_user(am_hreq.ops, size);
|
|
if (IS_ERR(ops)) {
|
|
error = PTR_ERR(ops);
|
|
goto out_dput;
|
|
}
|
|
|
|
error = -ENOMEM;
|
|
attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
|
|
if (!attr_name)
|
|
goto out_kfree_ops;
|
|
|
|
error = 0;
|
|
for (i = 0; i < am_hreq.opcount; i++) {
|
|
ops[i].am_error = strncpy_from_user((char *)attr_name,
|
|
ops[i].am_attrname, MAXNAMELEN);
|
|
if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
|
|
error = -ERANGE;
|
|
if (ops[i].am_error < 0)
|
|
break;
|
|
|
|
switch (ops[i].am_opcode) {
|
|
case ATTR_OP_GET:
|
|
ops[i].am_error = xfs_attrmulti_attr_get(
|
|
d_inode(dentry), attr_name,
|
|
ops[i].am_attrvalue, &ops[i].am_length,
|
|
ops[i].am_flags);
|
|
break;
|
|
case ATTR_OP_SET:
|
|
ops[i].am_error = mnt_want_write_file(parfilp);
|
|
if (ops[i].am_error)
|
|
break;
|
|
ops[i].am_error = xfs_attrmulti_attr_set(
|
|
d_inode(dentry), attr_name,
|
|
ops[i].am_attrvalue, ops[i].am_length,
|
|
ops[i].am_flags);
|
|
mnt_drop_write_file(parfilp);
|
|
break;
|
|
case ATTR_OP_REMOVE:
|
|
ops[i].am_error = mnt_want_write_file(parfilp);
|
|
if (ops[i].am_error)
|
|
break;
|
|
ops[i].am_error = xfs_attrmulti_attr_remove(
|
|
d_inode(dentry), attr_name,
|
|
ops[i].am_flags);
|
|
mnt_drop_write_file(parfilp);
|
|
break;
|
|
default:
|
|
ops[i].am_error = -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (copy_to_user(am_hreq.ops, ops, size))
|
|
error = -EFAULT;
|
|
|
|
kfree(attr_name);
|
|
out_kfree_ops:
|
|
kfree(ops);
|
|
out_dput:
|
|
dput(dentry);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_ioc_space(
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
xfs_flock64_t *bf)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct iattr iattr;
|
|
enum xfs_prealloc_flags flags = 0;
|
|
uint iolock = XFS_IOLOCK_EXCL;
|
|
int error;
|
|
|
|
/*
|
|
* Only allow the sys admin to reserve space unless
|
|
* unwritten extents are enabled.
|
|
*/
|
|
if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
|
|
!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
|
|
return -EPERM;
|
|
|
|
if (!(filp->f_mode & FMODE_WRITE))
|
|
return -EBADF;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (filp->f_flags & O_DSYNC)
|
|
flags |= XFS_PREALLOC_SYNC;
|
|
if (filp->f_mode & FMODE_NOCMTIME)
|
|
flags |= XFS_PREALLOC_INVISIBLE;
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
|
|
xfs_ilock(ip, iolock);
|
|
error = xfs_break_layouts(inode, &iolock, false);
|
|
if (error)
|
|
goto out_unlock;
|
|
|
|
xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
|
|
iolock |= XFS_MMAPLOCK_EXCL;
|
|
|
|
switch (bf->l_whence) {
|
|
case 0: /*SEEK_SET*/
|
|
break;
|
|
case 1: /*SEEK_CUR*/
|
|
bf->l_start += filp->f_pos;
|
|
break;
|
|
case 2: /*SEEK_END*/
|
|
bf->l_start += XFS_ISIZE(ip);
|
|
break;
|
|
default:
|
|
error = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
/*
|
|
* length of <= 0 for resv/unresv/zero is invalid. length for
|
|
* alloc/free is ignored completely and we have no idea what userspace
|
|
* might have set it to, so set it to zero to allow range
|
|
* checks to pass.
|
|
*/
|
|
switch (cmd) {
|
|
case XFS_IOC_ZERO_RANGE:
|
|
case XFS_IOC_RESVSP:
|
|
case XFS_IOC_RESVSP64:
|
|
case XFS_IOC_UNRESVSP:
|
|
case XFS_IOC_UNRESVSP64:
|
|
if (bf->l_len <= 0) {
|
|
error = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
break;
|
|
default:
|
|
bf->l_len = 0;
|
|
break;
|
|
}
|
|
|
|
if (bf->l_start < 0 ||
|
|
bf->l_start > inode->i_sb->s_maxbytes ||
|
|
bf->l_start + bf->l_len < 0 ||
|
|
bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
|
|
error = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case XFS_IOC_ZERO_RANGE:
|
|
flags |= XFS_PREALLOC_SET;
|
|
error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
|
|
break;
|
|
case XFS_IOC_RESVSP:
|
|
case XFS_IOC_RESVSP64:
|
|
flags |= XFS_PREALLOC_SET;
|
|
error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
|
|
XFS_BMAPI_PREALLOC);
|
|
break;
|
|
case XFS_IOC_UNRESVSP:
|
|
case XFS_IOC_UNRESVSP64:
|
|
error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
|
|
break;
|
|
case XFS_IOC_ALLOCSP:
|
|
case XFS_IOC_ALLOCSP64:
|
|
case XFS_IOC_FREESP:
|
|
case XFS_IOC_FREESP64:
|
|
flags |= XFS_PREALLOC_CLEAR;
|
|
if (bf->l_start > XFS_ISIZE(ip)) {
|
|
error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
|
|
bf->l_start - XFS_ISIZE(ip), 0);
|
|
if (error)
|
|
goto out_unlock;
|
|
}
|
|
|
|
iattr.ia_valid = ATTR_SIZE;
|
|
iattr.ia_size = bf->l_start;
|
|
|
|
error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
error = -EINVAL;
|
|
}
|
|
|
|
if (error)
|
|
goto out_unlock;
|
|
|
|
error = xfs_update_prealloc_flags(ip, flags);
|
|
|
|
out_unlock:
|
|
xfs_iunlock(ip, iolock);
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_bulkstat(
|
|
xfs_mount_t *mp,
|
|
unsigned int cmd,
|
|
void __user *arg)
|
|
{
|
|
xfs_fsop_bulkreq_t bulkreq;
|
|
int count; /* # of records returned */
|
|
xfs_ino_t inlast; /* last inode number */
|
|
int done;
|
|
int error;
|
|
|
|
/* done = 1 if there are more stats to get and if bulkstat */
|
|
/* should be called again (unused here, but used in dmapi) */
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
|
|
return -EFAULT;
|
|
|
|
if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
|
|
return -EFAULT;
|
|
|
|
if ((count = bulkreq.icount) <= 0)
|
|
return -EINVAL;
|
|
|
|
if (bulkreq.ubuffer == NULL)
|
|
return -EINVAL;
|
|
|
|
if (cmd == XFS_IOC_FSINUMBERS)
|
|
error = xfs_inumbers(mp, &inlast, &count,
|
|
bulkreq.ubuffer, xfs_inumbers_fmt);
|
|
else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
|
|
error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
|
|
sizeof(xfs_bstat_t), NULL, &done);
|
|
else /* XFS_IOC_FSBULKSTAT */
|
|
error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
|
|
sizeof(xfs_bstat_t), bulkreq.ubuffer,
|
|
&done);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
if (bulkreq.ocount != NULL) {
|
|
if (copy_to_user(bulkreq.lastip, &inlast,
|
|
sizeof(xfs_ino_t)))
|
|
return -EFAULT;
|
|
|
|
if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_fsgeometry_v1(
|
|
xfs_mount_t *mp,
|
|
void __user *arg)
|
|
{
|
|
xfs_fsop_geom_t fsgeo;
|
|
int error;
|
|
|
|
error = xfs_fs_geometry(mp, &fsgeo, 3);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Caller should have passed an argument of type
|
|
* xfs_fsop_geom_v1_t. This is a proper subset of the
|
|
* xfs_fsop_geom_t that xfs_fs_geometry() fills in.
|
|
*/
|
|
if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_fsgeometry(
|
|
xfs_mount_t *mp,
|
|
void __user *arg)
|
|
{
|
|
xfs_fsop_geom_t fsgeo;
|
|
int error;
|
|
|
|
error = xfs_fs_geometry(mp, &fsgeo, 4);
|
|
if (error)
|
|
return error;
|
|
|
|
if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Linux extended inode flags interface.
|
|
*/
|
|
|
|
STATIC unsigned int
|
|
xfs_merge_ioc_xflags(
|
|
unsigned int flags,
|
|
unsigned int start)
|
|
{
|
|
unsigned int xflags = start;
|
|
|
|
if (flags & FS_IMMUTABLE_FL)
|
|
xflags |= FS_XFLAG_IMMUTABLE;
|
|
else
|
|
xflags &= ~FS_XFLAG_IMMUTABLE;
|
|
if (flags & FS_APPEND_FL)
|
|
xflags |= FS_XFLAG_APPEND;
|
|
else
|
|
xflags &= ~FS_XFLAG_APPEND;
|
|
if (flags & FS_SYNC_FL)
|
|
xflags |= FS_XFLAG_SYNC;
|
|
else
|
|
xflags &= ~FS_XFLAG_SYNC;
|
|
if (flags & FS_NOATIME_FL)
|
|
xflags |= FS_XFLAG_NOATIME;
|
|
else
|
|
xflags &= ~FS_XFLAG_NOATIME;
|
|
if (flags & FS_NODUMP_FL)
|
|
xflags |= FS_XFLAG_NODUMP;
|
|
else
|
|
xflags &= ~FS_XFLAG_NODUMP;
|
|
|
|
return xflags;
|
|
}
|
|
|
|
STATIC unsigned int
|
|
xfs_di2lxflags(
|
|
__uint16_t di_flags)
|
|
{
|
|
unsigned int flags = 0;
|
|
|
|
if (di_flags & XFS_DIFLAG_IMMUTABLE)
|
|
flags |= FS_IMMUTABLE_FL;
|
|
if (di_flags & XFS_DIFLAG_APPEND)
|
|
flags |= FS_APPEND_FL;
|
|
if (di_flags & XFS_DIFLAG_SYNC)
|
|
flags |= FS_SYNC_FL;
|
|
if (di_flags & XFS_DIFLAG_NOATIME)
|
|
flags |= FS_NOATIME_FL;
|
|
if (di_flags & XFS_DIFLAG_NODUMP)
|
|
flags |= FS_NODUMP_FL;
|
|
return flags;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_fsgetxattr(
|
|
xfs_inode_t *ip,
|
|
int attr,
|
|
void __user *arg)
|
|
{
|
|
struct fsxattr fa;
|
|
|
|
memset(&fa, 0, sizeof(struct fsxattr));
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_SHARED);
|
|
fa.fsx_xflags = xfs_ip2xflags(ip);
|
|
fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
|
|
fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
|
|
ip->i_mount->m_sb.sb_blocklog;
|
|
fa.fsx_projid = xfs_get_projid(ip);
|
|
|
|
if (attr) {
|
|
if (ip->i_afp) {
|
|
if (ip->i_afp->if_flags & XFS_IFEXTENTS)
|
|
fa.fsx_nextents = ip->i_afp->if_bytes /
|
|
sizeof(xfs_bmbt_rec_t);
|
|
else
|
|
fa.fsx_nextents = ip->i_d.di_anextents;
|
|
} else
|
|
fa.fsx_nextents = 0;
|
|
} else {
|
|
if (ip->i_df.if_flags & XFS_IFEXTENTS)
|
|
fa.fsx_nextents = ip->i_df.if_bytes /
|
|
sizeof(xfs_bmbt_rec_t);
|
|
else
|
|
fa.fsx_nextents = ip->i_d.di_nextents;
|
|
}
|
|
xfs_iunlock(ip, XFS_ILOCK_SHARED);
|
|
|
|
if (copy_to_user(arg, &fa, sizeof(fa)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_set_diflags(
|
|
struct xfs_inode *ip,
|
|
unsigned int xflags)
|
|
{
|
|
unsigned int di_flags;
|
|
uint64_t di_flags2;
|
|
|
|
/* can't set PREALLOC this way, just preserve it */
|
|
di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
|
|
if (xflags & FS_XFLAG_IMMUTABLE)
|
|
di_flags |= XFS_DIFLAG_IMMUTABLE;
|
|
if (xflags & FS_XFLAG_APPEND)
|
|
di_flags |= XFS_DIFLAG_APPEND;
|
|
if (xflags & FS_XFLAG_SYNC)
|
|
di_flags |= XFS_DIFLAG_SYNC;
|
|
if (xflags & FS_XFLAG_NOATIME)
|
|
di_flags |= XFS_DIFLAG_NOATIME;
|
|
if (xflags & FS_XFLAG_NODUMP)
|
|
di_flags |= XFS_DIFLAG_NODUMP;
|
|
if (xflags & FS_XFLAG_NODEFRAG)
|
|
di_flags |= XFS_DIFLAG_NODEFRAG;
|
|
if (xflags & FS_XFLAG_FILESTREAM)
|
|
di_flags |= XFS_DIFLAG_FILESTREAM;
|
|
if (S_ISDIR(VFS_I(ip)->i_mode)) {
|
|
if (xflags & FS_XFLAG_RTINHERIT)
|
|
di_flags |= XFS_DIFLAG_RTINHERIT;
|
|
if (xflags & FS_XFLAG_NOSYMLINKS)
|
|
di_flags |= XFS_DIFLAG_NOSYMLINKS;
|
|
if (xflags & FS_XFLAG_EXTSZINHERIT)
|
|
di_flags |= XFS_DIFLAG_EXTSZINHERIT;
|
|
if (xflags & FS_XFLAG_PROJINHERIT)
|
|
di_flags |= XFS_DIFLAG_PROJINHERIT;
|
|
} else if (S_ISREG(VFS_I(ip)->i_mode)) {
|
|
if (xflags & FS_XFLAG_REALTIME)
|
|
di_flags |= XFS_DIFLAG_REALTIME;
|
|
if (xflags & FS_XFLAG_EXTSIZE)
|
|
di_flags |= XFS_DIFLAG_EXTSIZE;
|
|
}
|
|
ip->i_d.di_flags = di_flags;
|
|
|
|
/* diflags2 only valid for v3 inodes. */
|
|
if (ip->i_d.di_version < 3)
|
|
return;
|
|
|
|
di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
|
|
if (xflags & FS_XFLAG_DAX)
|
|
di_flags2 |= XFS_DIFLAG2_DAX;
|
|
if (xflags & FS_XFLAG_COWEXTSIZE)
|
|
di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
|
|
|
|
ip->i_d.di_flags2 = di_flags2;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_diflags_to_linux(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
unsigned int xflags = xfs_ip2xflags(ip);
|
|
|
|
if (xflags & FS_XFLAG_IMMUTABLE)
|
|
inode->i_flags |= S_IMMUTABLE;
|
|
else
|
|
inode->i_flags &= ~S_IMMUTABLE;
|
|
if (xflags & FS_XFLAG_APPEND)
|
|
inode->i_flags |= S_APPEND;
|
|
else
|
|
inode->i_flags &= ~S_APPEND;
|
|
if (xflags & FS_XFLAG_SYNC)
|
|
inode->i_flags |= S_SYNC;
|
|
else
|
|
inode->i_flags &= ~S_SYNC;
|
|
if (xflags & FS_XFLAG_NOATIME)
|
|
inode->i_flags |= S_NOATIME;
|
|
else
|
|
inode->i_flags &= ~S_NOATIME;
|
|
if (xflags & FS_XFLAG_DAX)
|
|
inode->i_flags |= S_DAX;
|
|
else
|
|
inode->i_flags &= ~S_DAX;
|
|
|
|
}
|
|
|
|
static int
|
|
xfs_ioctl_setattr_xflags(
|
|
struct xfs_trans *tp,
|
|
struct xfs_inode *ip,
|
|
struct fsxattr *fa)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
/* Can't change realtime flag if any extents are allocated. */
|
|
if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
|
|
XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
|
|
return -EINVAL;
|
|
|
|
/* If realtime flag is set then must have realtime device */
|
|
if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
|
|
if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
|
|
(ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Clear reflink if we are actually able to set the rt flag. */
|
|
if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
|
|
ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
|
|
|
|
/* Don't allow us to set DAX mode for a reflinked file for now. */
|
|
if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Can't modify an immutable/append-only file unless
|
|
* we have appropriate permission.
|
|
*/
|
|
if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
|
|
(fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
|
|
!capable(CAP_LINUX_IMMUTABLE))
|
|
return -EPERM;
|
|
|
|
xfs_set_diflags(ip, fa->fsx_xflags);
|
|
xfs_diflags_to_linux(ip);
|
|
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
XFS_STATS_INC(mp, xs_ig_attrchg);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If we are changing DAX flags, we have to ensure the file is clean and any
|
|
* cached objects in the address space are invalidated and removed. This
|
|
* requires us to lock out other IO and page faults similar to a truncate
|
|
* operation. The locks need to be held until the transaction has been committed
|
|
* so that the cache invalidation is atomic with respect to the DAX flag
|
|
* manipulation.
|
|
*/
|
|
static int
|
|
xfs_ioctl_setattr_dax_invalidate(
|
|
struct xfs_inode *ip,
|
|
struct fsxattr *fa,
|
|
int *join_flags)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
int error;
|
|
|
|
*join_flags = 0;
|
|
|
|
/*
|
|
* It is only valid to set the DAX flag on regular files and
|
|
* directories on filesystems where the block size is equal to the page
|
|
* size. On directories it serves as an inherit hint.
|
|
*/
|
|
if (fa->fsx_xflags & FS_XFLAG_DAX) {
|
|
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
|
|
return -EINVAL;
|
|
if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* If the DAX state is not changing, we have nothing to do here. */
|
|
if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
|
|
return 0;
|
|
if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
|
|
return 0;
|
|
|
|
/* lock, flush and invalidate mapping in preparation for flag change */
|
|
xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
error = filemap_write_and_wait(inode->i_mapping);
|
|
if (error)
|
|
goto out_unlock;
|
|
error = invalidate_inode_pages2(inode->i_mapping);
|
|
if (error)
|
|
goto out_unlock;
|
|
|
|
*join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
|
|
return 0;
|
|
|
|
out_unlock:
|
|
xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
|
|
return error;
|
|
|
|
}
|
|
|
|
/*
|
|
* Set up the transaction structure for the setattr operation, checking that we
|
|
* have permission to do so. On success, return a clean transaction and the
|
|
* inode locked exclusively ready for further operation specific checks. On
|
|
* failure, return an error without modifying or locking the inode.
|
|
*
|
|
* The inode might already be IO locked on call. If this is the case, it is
|
|
* indicated in @join_flags and we take full responsibility for ensuring they
|
|
* are unlocked from now on. Hence if we have an error here, we still have to
|
|
* unlock them. Otherwise, once they are joined to the transaction, they will
|
|
* be unlocked on commit/cancel.
|
|
*/
|
|
static struct xfs_trans *
|
|
xfs_ioctl_setattr_get_trans(
|
|
struct xfs_inode *ip,
|
|
int join_flags)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_trans *tp;
|
|
int error = -EROFS;
|
|
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
goto out_unlock;
|
|
error = -EIO;
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
goto out_unlock;
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
|
|
if (error)
|
|
return ERR_PTR(error);
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
|
|
join_flags = 0;
|
|
|
|
/*
|
|
* CAP_FOWNER overrides the following restrictions:
|
|
*
|
|
* The user ID of the calling process must be equal to the file owner
|
|
* ID, except in cases where the CAP_FSETID capability is applicable.
|
|
*/
|
|
if (!inode_owner_or_capable(VFS_I(ip))) {
|
|
error = -EPERM;
|
|
goto out_cancel;
|
|
}
|
|
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
|
|
return tp;
|
|
|
|
out_cancel:
|
|
xfs_trans_cancel(tp);
|
|
out_unlock:
|
|
if (join_flags)
|
|
xfs_iunlock(ip, join_flags);
|
|
return ERR_PTR(error);
|
|
}
|
|
|
|
/*
|
|
* extent size hint validation is somewhat cumbersome. Rules are:
|
|
*
|
|
* 1. extent size hint is only valid for directories and regular files
|
|
* 2. FS_XFLAG_EXTSIZE is only valid for regular files
|
|
* 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
|
|
* 4. can only be changed on regular files if no extents are allocated
|
|
* 5. can be changed on directories at any time
|
|
* 6. extsize hint of 0 turns off hints, clears inode flags.
|
|
* 7. Extent size must be a multiple of the appropriate block size.
|
|
* 8. for non-realtime files, the extent size hint must be limited
|
|
* to half the AG size to avoid alignment extending the extent beyond the
|
|
* limits of the AG.
|
|
*/
|
|
static int
|
|
xfs_ioctl_setattr_check_extsize(
|
|
struct xfs_inode *ip,
|
|
struct fsxattr *fa)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
|
|
return -EINVAL;
|
|
|
|
if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
|
|
!S_ISDIR(VFS_I(ip)->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
|
|
((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
|
|
return -EINVAL;
|
|
|
|
if (fa->fsx_extsize != 0) {
|
|
xfs_extlen_t size;
|
|
xfs_fsblock_t extsize_fsb;
|
|
|
|
extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
|
|
if (extsize_fsb > MAXEXTLEN)
|
|
return -EINVAL;
|
|
|
|
if (XFS_IS_REALTIME_INODE(ip) ||
|
|
(fa->fsx_xflags & FS_XFLAG_REALTIME)) {
|
|
size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
|
|
} else {
|
|
size = mp->m_sb.sb_blocksize;
|
|
if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (fa->fsx_extsize % size)
|
|
return -EINVAL;
|
|
} else
|
|
fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* CoW extent size hint validation rules are:
|
|
*
|
|
* 1. CoW extent size hint can only be set if reflink is enabled on the fs.
|
|
* The inode does not have to have any shared blocks, but it must be a v3.
|
|
* 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
|
|
* for a directory, the hint is propagated to new files.
|
|
* 3. Can be changed on files & directories at any time.
|
|
* 4. CoW extsize hint of 0 turns off hints, clears inode flags.
|
|
* 5. Extent size must be a multiple of the appropriate block size.
|
|
* 6. The extent size hint must be limited to half the AG size to avoid
|
|
* alignment extending the extent beyond the limits of the AG.
|
|
*/
|
|
static int
|
|
xfs_ioctl_setattr_check_cowextsize(
|
|
struct xfs_inode *ip,
|
|
struct fsxattr *fa)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
|
|
return 0;
|
|
|
|
if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
|
|
ip->i_d.di_version != 3)
|
|
return -EINVAL;
|
|
|
|
if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (fa->fsx_cowextsize != 0) {
|
|
xfs_extlen_t size;
|
|
xfs_fsblock_t cowextsize_fsb;
|
|
|
|
cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
|
|
if (cowextsize_fsb > MAXEXTLEN)
|
|
return -EINVAL;
|
|
|
|
size = mp->m_sb.sb_blocksize;
|
|
if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
|
|
return -EINVAL;
|
|
|
|
if (fa->fsx_cowextsize % size)
|
|
return -EINVAL;
|
|
} else
|
|
fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xfs_ioctl_setattr_check_projid(
|
|
struct xfs_inode *ip,
|
|
struct fsxattr *fa)
|
|
{
|
|
/* Disallow 32bit project ids if projid32bit feature is not enabled. */
|
|
if (fa->fsx_projid > (__uint16_t)-1 &&
|
|
!xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* 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 (xfs_get_projid(ip) != fa->fsx_projid)
|
|
return -EINVAL;
|
|
if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
|
|
(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioctl_setattr(
|
|
xfs_inode_t *ip,
|
|
struct fsxattr *fa)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_trans *tp;
|
|
struct xfs_dquot *udqp = NULL;
|
|
struct xfs_dquot *pdqp = NULL;
|
|
struct xfs_dquot *olddquot = NULL;
|
|
int code;
|
|
int join_flags = 0;
|
|
|
|
trace_xfs_ioctl_setattr(ip);
|
|
|
|
code = xfs_ioctl_setattr_check_projid(ip, fa);
|
|
if (code)
|
|
return code;
|
|
|
|
/*
|
|
* If disk quotas is on, we make sure that the dquots do exist on disk,
|
|
* before we start any other transactions. Trying to do this later
|
|
* is messy. We don't care to take a readlock to look at the ids
|
|
* in inode here, because we can't hold it across the trans_reserve.
|
|
* If the IDs do change before we take the ilock, we're covered
|
|
* because the i_*dquot fields will get updated anyway.
|
|
*/
|
|
if (XFS_IS_QUOTA_ON(mp)) {
|
|
code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
|
|
ip->i_d.di_gid, fa->fsx_projid,
|
|
XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
|
|
if (code)
|
|
return code;
|
|
}
|
|
|
|
/*
|
|
* Changing DAX config may require inode locking for mapping
|
|
* invalidation. These need to be held all the way to transaction commit
|
|
* or cancel time, so need to be passed through to
|
|
* xfs_ioctl_setattr_get_trans() so it can apply them to the join call
|
|
* appropriately.
|
|
*/
|
|
code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
|
|
if (code)
|
|
goto error_free_dquots;
|
|
|
|
tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
|
|
if (IS_ERR(tp)) {
|
|
code = PTR_ERR(tp);
|
|
goto error_free_dquots;
|
|
}
|
|
|
|
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
|
|
xfs_get_projid(ip) != fa->fsx_projid) {
|
|
code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
|
|
capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
|
|
if (code) /* out of quota */
|
|
goto error_trans_cancel;
|
|
}
|
|
|
|
code = xfs_ioctl_setattr_check_extsize(ip, fa);
|
|
if (code)
|
|
goto error_trans_cancel;
|
|
|
|
code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
|
|
if (code)
|
|
goto error_trans_cancel;
|
|
|
|
code = xfs_ioctl_setattr_xflags(tp, ip, fa);
|
|
if (code)
|
|
goto error_trans_cancel;
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged. CAP_FSETID
|
|
* overrides the following restrictions:
|
|
*
|
|
* The set-user-ID and set-group-ID bits of a file will be cleared upon
|
|
* successful return from chown()
|
|
*/
|
|
|
|
if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
|
|
!capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
|
|
VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
|
|
|
|
/* Change the ownerships and register project quota modifications */
|
|
if (xfs_get_projid(ip) != fa->fsx_projid) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
|
|
olddquot = xfs_qm_vop_chown(tp, ip,
|
|
&ip->i_pdquot, pdqp);
|
|
}
|
|
ASSERT(ip->i_d.di_version > 1);
|
|
xfs_set_projid(ip, fa->fsx_projid);
|
|
}
|
|
|
|
/*
|
|
* Only set the extent size hint if we've already determined that the
|
|
* extent size hint should be set on the inode. If no extent size flags
|
|
* are set on the inode then unconditionally clear the extent size hint.
|
|
*/
|
|
if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
|
|
ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
|
|
else
|
|
ip->i_d.di_extsize = 0;
|
|
if (ip->i_d.di_version == 3 &&
|
|
(ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
|
|
ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
|
|
mp->m_sb.sb_blocklog;
|
|
else
|
|
ip->i_d.di_cowextsize = 0;
|
|
|
|
code = xfs_trans_commit(tp);
|
|
|
|
/*
|
|
* Release any dquot(s) the inode had kept before chown.
|
|
*/
|
|
xfs_qm_dqrele(olddquot);
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(pdqp);
|
|
|
|
return code;
|
|
|
|
error_trans_cancel:
|
|
xfs_trans_cancel(tp);
|
|
error_free_dquots:
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(pdqp);
|
|
return code;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_fssetxattr(
|
|
xfs_inode_t *ip,
|
|
struct file *filp,
|
|
void __user *arg)
|
|
{
|
|
struct fsxattr fa;
|
|
int error;
|
|
|
|
if (copy_from_user(&fa, arg, sizeof(fa)))
|
|
return -EFAULT;
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
error = xfs_ioctl_setattr(ip, &fa);
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_getxflags(
|
|
xfs_inode_t *ip,
|
|
void __user *arg)
|
|
{
|
|
unsigned int flags;
|
|
|
|
flags = xfs_di2lxflags(ip->i_d.di_flags);
|
|
if (copy_to_user(arg, &flags, sizeof(flags)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_setxflags(
|
|
struct xfs_inode *ip,
|
|
struct file *filp,
|
|
void __user *arg)
|
|
{
|
|
struct xfs_trans *tp;
|
|
struct fsxattr fa;
|
|
unsigned int flags;
|
|
int join_flags = 0;
|
|
int error;
|
|
|
|
if (copy_from_user(&flags, arg, sizeof(flags)))
|
|
return -EFAULT;
|
|
|
|
if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
|
|
FS_NOATIME_FL | FS_NODUMP_FL | \
|
|
FS_SYNC_FL))
|
|
return -EOPNOTSUPP;
|
|
|
|
fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Changing DAX config may require inode locking for mapping
|
|
* invalidation. These need to be held all the way to transaction commit
|
|
* or cancel time, so need to be passed through to
|
|
* xfs_ioctl_setattr_get_trans() so it can apply them to the join call
|
|
* appropriately.
|
|
*/
|
|
error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
|
|
if (error)
|
|
goto out_drop_write;
|
|
|
|
tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
|
|
if (IS_ERR(tp)) {
|
|
error = PTR_ERR(tp);
|
|
goto out_drop_write;
|
|
}
|
|
|
|
error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
|
|
if (error) {
|
|
xfs_trans_cancel(tp);
|
|
goto out_drop_write;
|
|
}
|
|
|
|
error = xfs_trans_commit(tp);
|
|
out_drop_write:
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
|
|
{
|
|
struct getbmap __user *base = (struct getbmap __user *)*ap;
|
|
|
|
/* copy only getbmap portion (not getbmapx) */
|
|
if (copy_to_user(base, bmv, sizeof(struct getbmap)))
|
|
return -EFAULT;
|
|
|
|
*ap += sizeof(struct getbmap);
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_getbmap(
|
|
struct file *file,
|
|
unsigned int cmd,
|
|
void __user *arg)
|
|
{
|
|
struct getbmapx bmx;
|
|
int error;
|
|
|
|
if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
|
|
return -EFAULT;
|
|
|
|
if (bmx.bmv_count < 2)
|
|
return -EINVAL;
|
|
|
|
bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
|
|
if (file->f_mode & FMODE_NOCMTIME)
|
|
bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
|
|
|
|
error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
|
|
(__force struct getbmap *)arg+1);
|
|
if (error)
|
|
return error;
|
|
|
|
/* copy back header - only size of getbmap */
|
|
if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
|
|
{
|
|
struct getbmapx __user *base = (struct getbmapx __user *)*ap;
|
|
|
|
if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
|
|
return -EFAULT;
|
|
|
|
*ap += sizeof(struct getbmapx);
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_ioc_getbmapx(
|
|
struct xfs_inode *ip,
|
|
void __user *arg)
|
|
{
|
|
struct getbmapx bmx;
|
|
int error;
|
|
|
|
if (copy_from_user(&bmx, arg, sizeof(bmx)))
|
|
return -EFAULT;
|
|
|
|
if (bmx.bmv_count < 2)
|
|
return -EINVAL;
|
|
|
|
if (bmx.bmv_iflags & (~BMV_IF_VALID))
|
|
return -EINVAL;
|
|
|
|
error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
|
|
(__force struct getbmapx *)arg+1);
|
|
if (error)
|
|
return error;
|
|
|
|
/* copy back header */
|
|
if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xfs_ioc_swapext(
|
|
xfs_swapext_t *sxp)
|
|
{
|
|
xfs_inode_t *ip, *tip;
|
|
struct fd f, tmp;
|
|
int error = 0;
|
|
|
|
/* Pull information for the target fd */
|
|
f = fdget((int)sxp->sx_fdtarget);
|
|
if (!f.file) {
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!(f.file->f_mode & FMODE_WRITE) ||
|
|
!(f.file->f_mode & FMODE_READ) ||
|
|
(f.file->f_flags & O_APPEND)) {
|
|
error = -EBADF;
|
|
goto out_put_file;
|
|
}
|
|
|
|
tmp = fdget((int)sxp->sx_fdtmp);
|
|
if (!tmp.file) {
|
|
error = -EINVAL;
|
|
goto out_put_file;
|
|
}
|
|
|
|
if (!(tmp.file->f_mode & FMODE_WRITE) ||
|
|
!(tmp.file->f_mode & FMODE_READ) ||
|
|
(tmp.file->f_flags & O_APPEND)) {
|
|
error = -EBADF;
|
|
goto out_put_tmp_file;
|
|
}
|
|
|
|
if (IS_SWAPFILE(file_inode(f.file)) ||
|
|
IS_SWAPFILE(file_inode(tmp.file))) {
|
|
error = -EINVAL;
|
|
goto out_put_tmp_file;
|
|
}
|
|
|
|
/*
|
|
* We need to ensure that the fds passed in point to XFS inodes
|
|
* before we cast and access them as XFS structures as we have no
|
|
* control over what the user passes us here.
|
|
*/
|
|
if (f.file->f_op != &xfs_file_operations ||
|
|
tmp.file->f_op != &xfs_file_operations) {
|
|
error = -EINVAL;
|
|
goto out_put_tmp_file;
|
|
}
|
|
|
|
ip = XFS_I(file_inode(f.file));
|
|
tip = XFS_I(file_inode(tmp.file));
|
|
|
|
if (ip->i_mount != tip->i_mount) {
|
|
error = -EINVAL;
|
|
goto out_put_tmp_file;
|
|
}
|
|
|
|
if (ip->i_ino == tip->i_ino) {
|
|
error = -EINVAL;
|
|
goto out_put_tmp_file;
|
|
}
|
|
|
|
if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
|
|
error = -EIO;
|
|
goto out_put_tmp_file;
|
|
}
|
|
|
|
error = xfs_swap_extents(ip, tip, sxp);
|
|
|
|
out_put_tmp_file:
|
|
fdput(tmp);
|
|
out_put_file:
|
|
fdput(f);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Note: some of the ioctl's return positive numbers as a
|
|
* byte count indicating success, such as readlink_by_handle.
|
|
* So we don't "sign flip" like most other routines. This means
|
|
* true errors need to be returned as a negative value.
|
|
*/
|
|
long
|
|
xfs_file_ioctl(
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
unsigned long p)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
void __user *arg = (void __user *)p;
|
|
int error;
|
|
|
|
trace_xfs_file_ioctl(ip);
|
|
|
|
switch (cmd) {
|
|
case FITRIM:
|
|
return xfs_ioc_trim(mp, arg);
|
|
case XFS_IOC_ALLOCSP:
|
|
case XFS_IOC_FREESP:
|
|
case XFS_IOC_RESVSP:
|
|
case XFS_IOC_UNRESVSP:
|
|
case XFS_IOC_ALLOCSP64:
|
|
case XFS_IOC_FREESP64:
|
|
case XFS_IOC_RESVSP64:
|
|
case XFS_IOC_UNRESVSP64:
|
|
case XFS_IOC_ZERO_RANGE: {
|
|
xfs_flock64_t bf;
|
|
|
|
if (copy_from_user(&bf, arg, sizeof(bf)))
|
|
return -EFAULT;
|
|
return xfs_ioc_space(filp, cmd, &bf);
|
|
}
|
|
case XFS_IOC_DIOINFO: {
|
|
struct dioattr da;
|
|
xfs_buftarg_t *target =
|
|
XFS_IS_REALTIME_INODE(ip) ?
|
|
mp->m_rtdev_targp : mp->m_ddev_targp;
|
|
|
|
da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
|
|
da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
|
|
|
|
if (copy_to_user(arg, &da, sizeof(da)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
case XFS_IOC_FSBULKSTAT_SINGLE:
|
|
case XFS_IOC_FSBULKSTAT:
|
|
case XFS_IOC_FSINUMBERS:
|
|
return xfs_ioc_bulkstat(mp, cmd, arg);
|
|
|
|
case XFS_IOC_FSGEOMETRY_V1:
|
|
return xfs_ioc_fsgeometry_v1(mp, arg);
|
|
|
|
case XFS_IOC_FSGEOMETRY:
|
|
return xfs_ioc_fsgeometry(mp, arg);
|
|
|
|
case XFS_IOC_GETVERSION:
|
|
return put_user(inode->i_generation, (int __user *)arg);
|
|
|
|
case XFS_IOC_FSGETXATTR:
|
|
return xfs_ioc_fsgetxattr(ip, 0, arg);
|
|
case XFS_IOC_FSGETXATTRA:
|
|
return xfs_ioc_fsgetxattr(ip, 1, arg);
|
|
case XFS_IOC_FSSETXATTR:
|
|
return xfs_ioc_fssetxattr(ip, filp, arg);
|
|
case XFS_IOC_GETXFLAGS:
|
|
return xfs_ioc_getxflags(ip, arg);
|
|
case XFS_IOC_SETXFLAGS:
|
|
return xfs_ioc_setxflags(ip, filp, arg);
|
|
|
|
case XFS_IOC_FSSETDM: {
|
|
struct fsdmidata dmi;
|
|
|
|
if (copy_from_user(&dmi, arg, sizeof(dmi)))
|
|
return -EFAULT;
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
|
|
error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
|
|
dmi.fsd_dmstate);
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
case XFS_IOC_GETBMAP:
|
|
case XFS_IOC_GETBMAPA:
|
|
return xfs_ioc_getbmap(filp, cmd, arg);
|
|
|
|
case XFS_IOC_GETBMAPX:
|
|
return xfs_ioc_getbmapx(ip, arg);
|
|
|
|
case XFS_IOC_FD_TO_HANDLE:
|
|
case XFS_IOC_PATH_TO_HANDLE:
|
|
case XFS_IOC_PATH_TO_FSHANDLE: {
|
|
xfs_fsop_handlereq_t hreq;
|
|
|
|
if (copy_from_user(&hreq, arg, sizeof(hreq)))
|
|
return -EFAULT;
|
|
return xfs_find_handle(cmd, &hreq);
|
|
}
|
|
case XFS_IOC_OPEN_BY_HANDLE: {
|
|
xfs_fsop_handlereq_t hreq;
|
|
|
|
if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
|
|
return -EFAULT;
|
|
return xfs_open_by_handle(filp, &hreq);
|
|
}
|
|
case XFS_IOC_FSSETDM_BY_HANDLE:
|
|
return xfs_fssetdm_by_handle(filp, arg);
|
|
|
|
case XFS_IOC_READLINK_BY_HANDLE: {
|
|
xfs_fsop_handlereq_t hreq;
|
|
|
|
if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
|
|
return -EFAULT;
|
|
return xfs_readlink_by_handle(filp, &hreq);
|
|
}
|
|
case XFS_IOC_ATTRLIST_BY_HANDLE:
|
|
return xfs_attrlist_by_handle(filp, arg);
|
|
|
|
case XFS_IOC_ATTRMULTI_BY_HANDLE:
|
|
return xfs_attrmulti_by_handle(filp, arg);
|
|
|
|
case XFS_IOC_SWAPEXT: {
|
|
struct xfs_swapext sxp;
|
|
|
|
if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
|
|
return -EFAULT;
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
error = xfs_ioc_swapext(&sxp);
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
case XFS_IOC_FSCOUNTS: {
|
|
xfs_fsop_counts_t out;
|
|
|
|
error = xfs_fs_counts(mp, &out);
|
|
if (error)
|
|
return error;
|
|
|
|
if (copy_to_user(arg, &out, sizeof(out)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
case XFS_IOC_SET_RESBLKS: {
|
|
xfs_fsop_resblks_t inout;
|
|
__uint64_t in;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
return -EROFS;
|
|
|
|
if (copy_from_user(&inout, arg, sizeof(inout)))
|
|
return -EFAULT;
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
|
|
/* input parameter is passed in resblks field of structure */
|
|
in = inout.resblks;
|
|
error = xfs_reserve_blocks(mp, &in, &inout);
|
|
mnt_drop_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
|
|
if (copy_to_user(arg, &inout, sizeof(inout)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
case XFS_IOC_GET_RESBLKS: {
|
|
xfs_fsop_resblks_t out;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
error = xfs_reserve_blocks(mp, NULL, &out);
|
|
if (error)
|
|
return error;
|
|
|
|
if (copy_to_user(arg, &out, sizeof(out)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
case XFS_IOC_FSGROWFSDATA: {
|
|
xfs_growfs_data_t in;
|
|
|
|
if (copy_from_user(&in, arg, sizeof(in)))
|
|
return -EFAULT;
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
error = xfs_growfs_data(mp, &in);
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
case XFS_IOC_FSGROWFSLOG: {
|
|
xfs_growfs_log_t in;
|
|
|
|
if (copy_from_user(&in, arg, sizeof(in)))
|
|
return -EFAULT;
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
error = xfs_growfs_log(mp, &in);
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
case XFS_IOC_FSGROWFSRT: {
|
|
xfs_growfs_rt_t in;
|
|
|
|
if (copy_from_user(&in, arg, sizeof(in)))
|
|
return -EFAULT;
|
|
|
|
error = mnt_want_write_file(filp);
|
|
if (error)
|
|
return error;
|
|
error = xfs_growfs_rt(mp, &in);
|
|
mnt_drop_write_file(filp);
|
|
return error;
|
|
}
|
|
|
|
case XFS_IOC_GOINGDOWN: {
|
|
__uint32_t in;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (get_user(in, (__uint32_t __user *)arg))
|
|
return -EFAULT;
|
|
|
|
return xfs_fs_goingdown(mp, in);
|
|
}
|
|
|
|
case XFS_IOC_ERROR_INJECTION: {
|
|
xfs_error_injection_t in;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&in, arg, sizeof(in)))
|
|
return -EFAULT;
|
|
|
|
return xfs_errortag_add(in.errtag, mp);
|
|
}
|
|
|
|
case XFS_IOC_ERROR_CLEARALL:
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
return xfs_errortag_clearall(mp, 1);
|
|
|
|
case XFS_IOC_FREE_EOFBLOCKS: {
|
|
struct xfs_fs_eofblocks eofb;
|
|
struct xfs_eofblocks keofb;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
return -EROFS;
|
|
|
|
if (copy_from_user(&eofb, arg, sizeof(eofb)))
|
|
return -EFAULT;
|
|
|
|
error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
|
|
if (error)
|
|
return error;
|
|
|
|
return xfs_icache_free_eofblocks(mp, &keofb);
|
|
}
|
|
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|