include/sys/zfs_project.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2017, Intel Corporation. All rights reserved.
  23  */
  24
  25 #ifndef _SYS_ZFS_PROJECT_H
  26 #define _SYS_ZFS_PROJECT_H
  27
  28 #ifndef _KERNEL
  29 #ifndef _SYS_MOUNT_H
  30 /* XXX: some hack to avoid include sys/mount.h */
  31 #define _SYS_MOUNT_H
  32 #endif
  33 #endif
  34
  35 #include <linux/fs.h>
  36
  37 #ifdef FS_PROJINHERIT_FL
  38 #define ZFS_PROJINHERIT_FL      FS_PROJINHERIT_FL
  39 #else
  40 #define ZFS_PROJINHERIT_FL      0x20000000
  41 #endif
  42
  43 #ifdef FS_IOC_FSGETXATTR
  44 typedef struct fsxattr zfsxattr_t;
  45
  46 #define ZFS_IOC_FSGETXATTR      FS_IOC_FSGETXATTR
  47 #define ZFS_IOC_FSSETXATTR      FS_IOC_FSSETXATTR
  48 #else
  49 struct zfsxattr {
  50         uint32_t        fsx_xflags;     /* xflags field value (get/set) */
  51         uint32_t        fsx_extsize;    /* extsize field value (get/set) */
  52         uint32_t        fsx_nextents;   /* nextents field value (get)   */
  53         uint32_t        fsx_projid;     /* project identifier (get/set) */
  54         uint32_t        fsx_cowextsize;
  55         unsigned char   fsx_pad[8];
  56 };
  57 typedef struct zfsxattr zfsxattr_t;
  58
  59 #define ZFS_IOC_FSGETXATTR      _IOR('X', 31, zfsxattr_t)
  60 #define ZFS_IOC_FSSETXATTR      _IOW('X', 32, zfsxattr_t)
  61 #endif
  62
  63 #define ZFS_DEFAULT_PROJID      (0ULL)
  64 /*
  65  * It is NOT ondisk project ID value. Just means either the object has
  66  * no project ID or the operation does not touch project ID attribute.
  67  */
  68 #define ZFS_INVALID_PROJID      (-1ULL)
  69
  70 static inline boolean_t
  71 zpl_is_valid_projid(uint32_t projid)
  72 {
  73         /*
  74          * zfsxattr::fsx_projid is 32-bits, when convert to uint64_t,
  75          * the higher 32-bits will be set as zero, so cannot directly
  76          * compare with ZFS_INVALID_PROJID (-1ULL)
  77          */
  78         if ((uint32_t)ZFS_INVALID_PROJID == projid)
  79                 return (B_FALSE);
  80         return (B_TRUE);
  81 }
  82
  83 #endif  /* _SYS_ZFS_PROJECT_H */