+
+int
+xfs_ioctl(
+ xfs_inode_t *ip,
+ struct file *filp,
+ int ioflags,
+ unsigned int cmd,
+ void __user *arg)
+{
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ xfs_mount_t *mp = ip->i_mount;
+ int error;
+
+ xfs_itrace_entry(XFS_I(inode));
+ switch (cmd) {
+
+ 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:
+ /*
+ * Only allow the sys admin to reserve space unless
+ * unwritten extents are enabled.
+ */
+ if (!xfs_sb_version_hasextflgbit(&mp->m_sb) &&
+ !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg);
+
+ 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 = 1 << target->bt_sshift;
+ da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
+
+ if (copy_to_user(arg, &da, sizeof(da)))
+ return -XFS_ERROR(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 -XFS_ERROR(EFAULT);
+
+ error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
+ dmi.fsd_dmstate);
+ return -error;
+ }
+
+ case XFS_IOC_GETBMAP:
+ case XFS_IOC_GETBMAPA:
+ return xfs_ioc_getbmap(ip, ioflags, 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:
+ return xfs_find_handle(cmd, arg);
+
+ case XFS_IOC_OPEN_BY_HANDLE:
+ return xfs_open_by_handle(mp, arg, filp, inode);
+
+ case XFS_IOC_FSSETDM_BY_HANDLE:
+ return xfs_fssetdm_by_handle(mp, arg, inode);
+
+ case XFS_IOC_READLINK_BY_HANDLE:
+ return xfs_readlink_by_handle(mp, arg, inode);
+
+ case XFS_IOC_ATTRLIST_BY_HANDLE:
+ return xfs_attrlist_by_handle(mp, arg, inode);
+
+ case XFS_IOC_ATTRMULTI_BY_HANDLE:
+ return xfs_attrmulti_by_handle(mp, arg, filp, inode);
+
+ case XFS_IOC_SWAPEXT: {
+ error = xfs_swapext((struct xfs_swapext __user *)arg);
+ 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 -XFS_ERROR(EFAULT);
+ return 0;
+ }
+
+ case XFS_IOC_SET_RESBLKS: {
+ xfs_fsop_resblks_t inout;
+ __uint64_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&inout, arg, sizeof(inout)))
+ return -XFS_ERROR(EFAULT);
+
+ /* input parameter is passed in resblks field of structure */
+ in = inout.resblks;
+ error = xfs_reserve_blocks(mp, &in, &inout);
+ if (error)
+ return -error;
+
+ if (copy_to_user(arg, &inout, sizeof(inout)))
+ return -XFS_ERROR(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 -XFS_ERROR(EFAULT);
+
+ return 0;
+ }
+
+ case XFS_IOC_FSGROWFSDATA: {
+ xfs_growfs_data_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_growfs_data(mp, &in);
+ return -error;
+ }
+
+ case XFS_IOC_FSGROWFSLOG: {
+ xfs_growfs_log_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_growfs_log(mp, &in);
+ return -error;
+ }
+
+ case XFS_IOC_FSGROWFSRT: {
+ xfs_growfs_rt_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&in, arg, sizeof(in)))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_growfs_rt(mp, &in);
+ return -error;
+ }
+
+ case XFS_IOC_FREEZE:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (inode->i_sb->s_frozen == SB_UNFROZEN)
+ freeze_bdev(inode->i_sb->s_bdev);
+ return 0;
+
+ case XFS_IOC_THAW:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (inode->i_sb->s_frozen != SB_UNFROZEN)
+ thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
+ return 0;
+
+ case XFS_IOC_GOINGDOWN: {
+ __uint32_t in;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(in, (__uint32_t __user *)arg))
+ return -XFS_ERROR(EFAULT);
+
+ error = xfs_fs_goingdown(mp, in);
+ return -error;
+ }
+
+ 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 -XFS_ERROR(EFAULT);
+
+ error = xfs_errortag_add(in.errtag, mp);
+ return -error;
+ }
+
+ case XFS_IOC_ERROR_CLEARALL:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ error = xfs_errortag_clearall(mp, 1);
+ return -error;
+
+ default:
+ return -ENOTTY;
+ }
+}