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231753ef78
Pull partial readlink cleanups from Miklos Szeredi. This is the uncontroversial part of the readlink cleanup patch-set that simplifies the default readlink handling. Miklos and Al are still discussing the rest of the series. * git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: vfs: make generic_readlink() static vfs: remove ".readlink = generic_readlink" assignments vfs: default to generic_readlink() vfs: replace calling i_op->readlink with vfs_readlink() proc/self: use generic_readlink ecryptfs: use vfs_get_link() bad_inode: add missing i_op initializers
1988 lines
45 KiB
C
1988 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_is_symlink(dentry)) {
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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 = vfs_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))
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return -EPERM;
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if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
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return -EFAULT;
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if (al_hreq.buflen < sizeof(struct attrlist) ||
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al_hreq.buflen > XFS_XATTR_LIST_MAX)
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return -EINVAL;
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/*
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* Reject flags, only allow namespaces.
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*/
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if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
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return -EINVAL;
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dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
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if (IS_ERR(dentry))
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return PTR_ERR(dentry);
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kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
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if (!kbuf)
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goto out_dput;
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cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
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error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
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al_hreq.flags, cursor);
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if (error)
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goto out_kfree;
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if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
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error = -EFAULT;
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goto out_kfree;
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}
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if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
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error = -EFAULT;
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out_kfree:
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kmem_free(kbuf);
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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_attrmulti_attr_get(
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struct inode *inode,
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unsigned char *name,
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unsigned char __user *ubuf,
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__uint32_t *len,
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__uint32_t flags)
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{
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unsigned char *kbuf;
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int error = -EFAULT;
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if (*len > XFS_XATTR_SIZE_MAX)
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return -EINVAL;
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kbuf = kmem_zalloc_large(*len, KM_SLEEP);
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if (!kbuf)
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return -ENOMEM;
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error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
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if (error)
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goto out_kfree;
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if (copy_to_user(ubuf, kbuf, *len))
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error = -EFAULT;
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out_kfree:
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kmem_free(kbuf);
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return error;
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}
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int
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xfs_attrmulti_attr_set(
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struct inode *inode,
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unsigned char *name,
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const unsigned char __user *ubuf,
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__uint32_t len,
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__uint32_t flags)
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{
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unsigned char *kbuf;
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int error;
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if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
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return -EPERM;
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if (len > XFS_XATTR_SIZE_MAX)
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return -EINVAL;
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kbuf = memdup_user(ubuf, len);
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if (IS_ERR(kbuf))
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return PTR_ERR(kbuf);
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error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
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if (!error)
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xfs_forget_acl(inode, name, flags);
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kfree(kbuf);
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return error;
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}
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int
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xfs_attrmulti_attr_remove(
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struct inode *inode,
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unsigned char *name,
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__uint32_t flags)
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{
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int error;
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if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
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return -EPERM;
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error = xfs_attr_remove(XFS_I(inode), name, flags);
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if (!error)
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xfs_forget_acl(inode, name, flags);
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return error;
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}
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STATIC int
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xfs_attrmulti_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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xfs_attr_multiop_t *ops;
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xfs_fsop_attrmulti_handlereq_t am_hreq;
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|
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);
|
|
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 = xfs_iext_count(ip->i_afp);
|
|
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 = xfs_iext_count(&ip->i_df);
|
|
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;
|
|
}
|
|
}
|