1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * ocfs2_ioctl.h 5 * 6 * Defines OCFS2 ioctls. 7 * 8 * Copyright (C) 2010 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License, version 2, as published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 */ 19 20 #ifndef OCFS2_IOCTL_H 21 #define OCFS2_IOCTL_H 22 23 /* 24 * ioctl commands 25 */ 26 #define OCFS2_IOC_GETFLAGS FS_IOC_GETFLAGS 27 #define OCFS2_IOC_SETFLAGS FS_IOC_SETFLAGS 28 #define OCFS2_IOC32_GETFLAGS FS_IOC32_GETFLAGS 29 #define OCFS2_IOC32_SETFLAGS FS_IOC32_SETFLAGS 30 31 /* 32 * Space reservation / allocation / free ioctls and argument structure 33 * are designed to be compatible with XFS. 34 * 35 * ALLOCSP* and FREESP* are not and will never be supported, but are 36 * included here for completeness. 37 */ 38 struct ocfs2_space_resv { 39 __s16 l_type; 40 __s16 l_whence; 41 __s64 l_start; 42 __s64 l_len; /* len == 0 means until end of file */ 43 __s32 l_sysid; 44 __u32 l_pid; 45 __s32 l_pad[4]; /* reserve area */ 46 }; 47 48 #define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv) 49 #define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv) 50 #define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv) 51 #define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv) 52 #define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv) 53 #define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv) 54 #define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv) 55 #define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv) 56 57 /* Used to pass group descriptor data when online resize is done */ 58 struct ocfs2_new_group_input { 59 __u64 group; /* Group descriptor's blkno. */ 60 __u32 clusters; /* Total number of clusters in this group */ 61 __u32 frees; /* Total free clusters in this group */ 62 __u16 chain; /* Chain for this group */ 63 __u16 reserved1; 64 __u32 reserved2; 65 }; 66 67 #define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int) 68 #define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input) 69 #define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input) 70 71 /* Used to pass 2 file names to reflink. */ 72 struct reflink_arguments { 73 __u64 old_path; 74 __u64 new_path; 75 __u64 preserve; 76 }; 77 #define OCFS2_IOC_REFLINK _IOW('o', 4, struct reflink_arguments) 78 79 /* Following definitions dedicated for ocfs2_info_request ioctls. */ 80 #define OCFS2_INFO_MAX_REQUEST (50) 81 #define OCFS2_TEXT_UUID_LEN (OCFS2_VOL_UUID_LEN * 2) 82 83 /* Magic number of all requests */ 84 #define OCFS2_INFO_MAGIC (0x4F32494E) 85 86 /* 87 * Always try to separate info request into small pieces to 88 * guarantee the backward&forward compatibility. 89 */ 90 struct ocfs2_info { 91 __u64 oi_requests; /* Array of __u64 pointers to requests */ 92 __u32 oi_count; /* Number of requests in info_requests */ 93 __u32 oi_pad; 94 }; 95 96 struct ocfs2_info_request { 97 /*00*/ __u32 ir_magic; /* Magic number */ 98 __u32 ir_code; /* Info request code */ 99 __u32 ir_size; /* Size of request */ 100 __u32 ir_flags; /* Request flags */ 101 /*10*/ /* Request specific fields */ 102 }; 103 104 struct ocfs2_info_clustersize { 105 struct ocfs2_info_request ic_req; 106 __u32 ic_clustersize; 107 __u32 ic_pad; 108 }; 109 110 struct ocfs2_info_blocksize { 111 struct ocfs2_info_request ib_req; 112 __u32 ib_blocksize; 113 __u32 ib_pad; 114 }; 115 116 struct ocfs2_info_maxslots { 117 struct ocfs2_info_request im_req; 118 __u32 im_max_slots; 119 __u32 im_pad; 120 }; 121 122 struct ocfs2_info_label { 123 struct ocfs2_info_request il_req; 124 __u8 il_label[OCFS2_MAX_VOL_LABEL_LEN]; 125 } __attribute__ ((packed)); 126 127 struct ocfs2_info_uuid { 128 struct ocfs2_info_request iu_req; 129 __u8 iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1]; 130 } __attribute__ ((packed)); 131 132 struct ocfs2_info_fs_features { 133 struct ocfs2_info_request if_req; 134 __u32 if_compat_features; 135 __u32 if_incompat_features; 136 __u32 if_ro_compat_features; 137 __u32 if_pad; 138 }; 139 140 struct ocfs2_info_journal_size { 141 struct ocfs2_info_request ij_req; 142 __u64 ij_journal_size; 143 }; 144 145 /* Codes for ocfs2_info_request */ 146 enum ocfs2_info_type { 147 OCFS2_INFO_CLUSTERSIZE = 1, 148 OCFS2_INFO_BLOCKSIZE, 149 OCFS2_INFO_MAXSLOTS, 150 OCFS2_INFO_LABEL, 151 OCFS2_INFO_UUID, 152 OCFS2_INFO_FS_FEATURES, 153 OCFS2_INFO_JOURNAL_SIZE, 154 OCFS2_INFO_NUM_TYPES 155 }; 156 157 /* Flags for struct ocfs2_info_request */ 158 /* Filled by the caller */ 159 #define OCFS2_INFO_FL_NON_COHERENT (0x00000001) /* Cluster coherency not 160 required. This is a hint. 161 It is up to ocfs2 whether 162 the request can be fulfilled 163 without locking. */ 164 /* Filled by ocfs2 */ 165 #define OCFS2_INFO_FL_FILLED (0x40000000) /* Filesystem understood 166 this request and 167 filled in the answer */ 168 169 #define OCFS2_INFO_FL_ERROR (0x80000000) /* Error happened during 170 request handling. */ 171 172 #define OCFS2_IOC_INFO _IOR('o', 5, struct ocfs2_info) 173 174 #endif /* OCFS2_IOCTL_H */ 175