1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_SB_H__ 19 #define __XFS_SB_H__ 20 21 /* 22 * Super block 23 * Fits into a sector-sized buffer at address 0 of each allocation group. 24 * Only the first of these is ever updated except during growfs. 25 */ 26 27 struct xfs_buf; 28 struct xfs_mount; 29 struct xfs_trans; 30 31 #define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */ 32 #define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */ 33 #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ 34 #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ 35 #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ 36 #define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */ 37 #define XFS_SB_VERSION_NUMBITS 0x000f 38 #define XFS_SB_VERSION_ALLFBITS 0xfff0 39 #define XFS_SB_VERSION_ATTRBIT 0x0010 40 #define XFS_SB_VERSION_NLINKBIT 0x0020 41 #define XFS_SB_VERSION_QUOTABIT 0x0040 42 #define XFS_SB_VERSION_ALIGNBIT 0x0080 43 #define XFS_SB_VERSION_DALIGNBIT 0x0100 44 #define XFS_SB_VERSION_SHAREDBIT 0x0200 45 #define XFS_SB_VERSION_LOGV2BIT 0x0400 46 #define XFS_SB_VERSION_SECTORBIT 0x0800 47 #define XFS_SB_VERSION_EXTFLGBIT 0x1000 48 #define XFS_SB_VERSION_DIRV2BIT 0x2000 49 #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */ 50 #define XFS_SB_VERSION_MOREBITSBIT 0x8000 51 52 /* 53 * Supported feature bit list is just all bits in the versionnum field because 54 * we've used them all up and understand them all. Except, of course, for the 55 * shared superblock bit, which nobody knows what it does and so is unsupported. 56 */ 57 #define XFS_SB_VERSION_OKBITS \ 58 ((XFS_SB_VERSION_NUMBITS | XFS_SB_VERSION_ALLFBITS) & \ 59 ~XFS_SB_VERSION_SHAREDBIT) 60 61 /* 62 * There are two words to hold XFS "feature" bits: the original 63 * word, sb_versionnum, and sb_features2. Whenever a bit is set in 64 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set. 65 * 66 * These defines represent bits in sb_features2. 67 */ 68 #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 69 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ 70 #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 71 #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ 72 #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ 73 #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ 74 #define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */ 75 #define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */ 76 77 #define XFS_SB_VERSION2_OKBITS \ 78 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ 79 XFS_SB_VERSION2_ATTR2BIT | \ 80 XFS_SB_VERSION2_PROJID32BIT | \ 81 XFS_SB_VERSION2_FTYPE) 82 83 /* 84 * Superblock - in core version. Must match the ondisk version below. 85 * Must be padded to 64 bit alignment. 86 */ 87 typedef struct xfs_sb { 88 __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ 89 __uint32_t sb_blocksize; /* logical block size, bytes */ 90 xfs_rfsblock_t sb_dblocks; /* number of data blocks */ 91 xfs_rfsblock_t sb_rblocks; /* number of realtime blocks */ 92 xfs_rtblock_t sb_rextents; /* number of realtime extents */ 93 uuid_t sb_uuid; /* file system unique id */ 94 xfs_fsblock_t sb_logstart; /* starting block of log if internal */ 95 xfs_ino_t sb_rootino; /* root inode number */ 96 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ 97 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ 98 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ 99 xfs_agblock_t sb_agblocks; /* size of an allocation group */ 100 xfs_agnumber_t sb_agcount; /* number of allocation groups */ 101 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ 102 xfs_extlen_t sb_logblocks; /* number of log blocks */ 103 __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ 104 __uint16_t sb_sectsize; /* volume sector size, bytes */ 105 __uint16_t sb_inodesize; /* inode size, bytes */ 106 __uint16_t sb_inopblock; /* inodes per block */ 107 char sb_fname[12]; /* file system name */ 108 __uint8_t sb_blocklog; /* log2 of sb_blocksize */ 109 __uint8_t sb_sectlog; /* log2 of sb_sectsize */ 110 __uint8_t sb_inodelog; /* log2 of sb_inodesize */ 111 __uint8_t sb_inopblog; /* log2 of sb_inopblock */ 112 __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ 113 __uint8_t sb_rextslog; /* log2 of sb_rextents */ 114 __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ 115 __uint8_t sb_imax_pct; /* max % of fs for inode space */ 116 /* statistics */ 117 /* 118 * These fields must remain contiguous. If you really 119 * want to change their layout, make sure you fix the 120 * code in xfs_trans_apply_sb_deltas(). 121 */ 122 __uint64_t sb_icount; /* allocated inodes */ 123 __uint64_t sb_ifree; /* free inodes */ 124 __uint64_t sb_fdblocks; /* free data blocks */ 125 __uint64_t sb_frextents; /* free realtime extents */ 126 /* 127 * End contiguous fields. 128 */ 129 xfs_ino_t sb_uquotino; /* user quota inode */ 130 xfs_ino_t sb_gquotino; /* group quota inode */ 131 __uint16_t sb_qflags; /* quota flags */ 132 __uint8_t sb_flags; /* misc. flags */ 133 __uint8_t sb_shared_vn; /* shared version number */ 134 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ 135 __uint32_t sb_unit; /* stripe or raid unit */ 136 __uint32_t sb_width; /* stripe or raid width */ 137 __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ 138 __uint8_t sb_logsectlog; /* log2 of the log sector size */ 139 __uint16_t sb_logsectsize; /* sector size for the log, bytes */ 140 __uint32_t sb_logsunit; /* stripe unit size for the log */ 141 __uint32_t sb_features2; /* additional feature bits */ 142 143 /* 144 * bad features2 field as a result of failing to pad the sb 145 * structure to 64 bits. Some machines will be using this field 146 * for features2 bits. Easiest just to mark it bad and not use 147 * it for anything else. 148 */ 149 __uint32_t sb_bad_features2; 150 151 /* version 5 superblock fields start here */ 152 153 /* feature masks */ 154 __uint32_t sb_features_compat; 155 __uint32_t sb_features_ro_compat; 156 __uint32_t sb_features_incompat; 157 __uint32_t sb_features_log_incompat; 158 159 __uint32_t sb_crc; /* superblock crc */ 160 __uint32_t sb_pad; 161 162 xfs_ino_t sb_pquotino; /* project quota inode */ 163 xfs_lsn_t sb_lsn; /* last write sequence */ 164 165 /* must be padded to 64 bit alignment */ 166 } xfs_sb_t; 167 168 #define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc) 169 170 /* 171 * Superblock - on disk version. Must match the in core version above. 172 * Must be padded to 64 bit alignment. 173 */ 174 typedef struct xfs_dsb { 175 __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */ 176 __be32 sb_blocksize; /* logical block size, bytes */ 177 __be64 sb_dblocks; /* number of data blocks */ 178 __be64 sb_rblocks; /* number of realtime blocks */ 179 __be64 sb_rextents; /* number of realtime extents */ 180 uuid_t sb_uuid; /* file system unique id */ 181 __be64 sb_logstart; /* starting block of log if internal */ 182 __be64 sb_rootino; /* root inode number */ 183 __be64 sb_rbmino; /* bitmap inode for realtime extents */ 184 __be64 sb_rsumino; /* summary inode for rt bitmap */ 185 __be32 sb_rextsize; /* realtime extent size, blocks */ 186 __be32 sb_agblocks; /* size of an allocation group */ 187 __be32 sb_agcount; /* number of allocation groups */ 188 __be32 sb_rbmblocks; /* number of rt bitmap blocks */ 189 __be32 sb_logblocks; /* number of log blocks */ 190 __be16 sb_versionnum; /* header version == XFS_SB_VERSION */ 191 __be16 sb_sectsize; /* volume sector size, bytes */ 192 __be16 sb_inodesize; /* inode size, bytes */ 193 __be16 sb_inopblock; /* inodes per block */ 194 char sb_fname[12]; /* file system name */ 195 __u8 sb_blocklog; /* log2 of sb_blocksize */ 196 __u8 sb_sectlog; /* log2 of sb_sectsize */ 197 __u8 sb_inodelog; /* log2 of sb_inodesize */ 198 __u8 sb_inopblog; /* log2 of sb_inopblock */ 199 __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */ 200 __u8 sb_rextslog; /* log2 of sb_rextents */ 201 __u8 sb_inprogress; /* mkfs is in progress, don't mount */ 202 __u8 sb_imax_pct; /* max % of fs for inode space */ 203 /* statistics */ 204 /* 205 * These fields must remain contiguous. If you really 206 * want to change their layout, make sure you fix the 207 * code in xfs_trans_apply_sb_deltas(). 208 */ 209 __be64 sb_icount; /* allocated inodes */ 210 __be64 sb_ifree; /* free inodes */ 211 __be64 sb_fdblocks; /* free data blocks */ 212 __be64 sb_frextents; /* free realtime extents */ 213 /* 214 * End contiguous fields. 215 */ 216 __be64 sb_uquotino; /* user quota inode */ 217 __be64 sb_gquotino; /* group quota inode */ 218 __be16 sb_qflags; /* quota flags */ 219 __u8 sb_flags; /* misc. flags */ 220 __u8 sb_shared_vn; /* shared version number */ 221 __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */ 222 __be32 sb_unit; /* stripe or raid unit */ 223 __be32 sb_width; /* stripe or raid width */ 224 __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */ 225 __u8 sb_logsectlog; /* log2 of the log sector size */ 226 __be16 sb_logsectsize; /* sector size for the log, bytes */ 227 __be32 sb_logsunit; /* stripe unit size for the log */ 228 __be32 sb_features2; /* additional feature bits */ 229 /* 230 * bad features2 field as a result of failing to pad the sb 231 * structure to 64 bits. Some machines will be using this field 232 * for features2 bits. Easiest just to mark it bad and not use 233 * it for anything else. 234 */ 235 __be32 sb_bad_features2; 236 237 /* version 5 superblock fields start here */ 238 239 /* feature masks */ 240 __be32 sb_features_compat; 241 __be32 sb_features_ro_compat; 242 __be32 sb_features_incompat; 243 __be32 sb_features_log_incompat; 244 245 __le32 sb_crc; /* superblock crc */ 246 __be32 sb_pad; 247 248 __be64 sb_pquotino; /* project quota inode */ 249 __be64 sb_lsn; /* last write sequence */ 250 251 /* must be padded to 64 bit alignment */ 252 } xfs_dsb_t; 253 254 /* 255 * Sequence number values for the fields. 256 */ 257 typedef enum { 258 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS, 259 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO, 260 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS, 261 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS, 262 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE, 263 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG, 264 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG, 265 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT, 266 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO, 267 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, 268 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, 269 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, 270 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT, 271 XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT, 272 XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD, 273 XFS_SBS_PQUOTINO, XFS_SBS_LSN, 274 XFS_SBS_FIELDCOUNT 275 } xfs_sb_field_t; 276 277 /* 278 * Mask values, defined based on the xfs_sb_field_t values. 279 * Only define the ones we're using. 280 */ 281 #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x) 282 #define XFS_SB_UUID XFS_SB_MVAL(UUID) 283 #define XFS_SB_FNAME XFS_SB_MVAL(FNAME) 284 #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO) 285 #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO) 286 #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO) 287 #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM) 288 #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO) 289 #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO) 290 #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS) 291 #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN) 292 #define XFS_SB_UNIT XFS_SB_MVAL(UNIT) 293 #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH) 294 #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT) 295 #define XFS_SB_IFREE XFS_SB_MVAL(IFREE) 296 #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) 297 #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) 298 #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) 299 #define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT) 300 #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT) 301 #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT) 302 #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT) 303 #define XFS_SB_CRC XFS_SB_MVAL(CRC) 304 #define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO) 305 #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) 306 #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) 307 #define XFS_SB_MOD_BITS \ 308 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \ 309 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ 310 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ 311 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ 312 XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \ 313 XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \ 314 XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO) 315 316 317 /* 318 * Misc. Flags - warning - these will be cleared by xfs_repair unless 319 * a feature bit is set when the flag is used. 320 */ 321 #define XFS_SBF_NOFLAGS 0x00 /* no flags set */ 322 #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ 323 324 /* 325 * define max. shared version we can interoperate with 326 */ 327 #define XFS_SB_MAX_SHARED_VN 0 328 329 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) 330 331 /* 332 * The first XFS version we support is a v4 superblock with V2 directories. 333 */ 334 static inline bool xfs_sb_good_v4_features(struct xfs_sb *sbp) 335 { 336 if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)) 337 return false; 338 339 /* check for unknown features in the fs */ 340 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) || 341 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && 342 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS))) 343 return false; 344 345 return true; 346 } 347 348 static inline bool xfs_sb_good_version(struct xfs_sb *sbp) 349 { 350 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) 351 return true; 352 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) 353 return xfs_sb_good_v4_features(sbp); 354 return false; 355 } 356 357 /* 358 * Detect a mismatched features2 field. Older kernels read/wrote 359 * this into the wrong slot, so to be safe we keep them in sync. 360 */ 361 static inline bool xfs_sb_has_mismatched_features2(struct xfs_sb *sbp) 362 { 363 return sbp->sb_bad_features2 != sbp->sb_features2; 364 } 365 366 static inline bool xfs_sb_version_hasattr(struct xfs_sb *sbp) 367 { 368 return (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT); 369 } 370 371 static inline void xfs_sb_version_addattr(struct xfs_sb *sbp) 372 { 373 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; 374 } 375 376 static inline bool xfs_sb_version_hasquota(struct xfs_sb *sbp) 377 { 378 return (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); 379 } 380 381 static inline void xfs_sb_version_addquota(struct xfs_sb *sbp) 382 { 383 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; 384 } 385 386 static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp) 387 { 388 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || 389 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)); 390 } 391 392 static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp) 393 { 394 return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); 395 } 396 397 static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp) 398 { 399 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || 400 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT); 401 } 402 403 static inline bool xfs_sb_version_hasextflgbit(struct xfs_sb *sbp) 404 { 405 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || 406 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT); 407 } 408 409 static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp) 410 { 411 return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); 412 } 413 414 static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp) 415 { 416 return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); 417 } 418 419 static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp) 420 { 421 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || 422 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT); 423 } 424 425 /* 426 * sb_features2 bit version macros. 427 */ 428 static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *sbp) 429 { 430 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || 431 (xfs_sb_version_hasmorebits(sbp) && 432 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)); 433 } 434 435 static inline bool xfs_sb_version_hasattr2(struct xfs_sb *sbp) 436 { 437 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || 438 (xfs_sb_version_hasmorebits(sbp) && 439 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)); 440 } 441 442 static inline void xfs_sb_version_addattr2(struct xfs_sb *sbp) 443 { 444 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; 445 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; 446 sbp->sb_bad_features2 |= XFS_SB_VERSION2_ATTR2BIT; 447 } 448 449 static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp) 450 { 451 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; 452 sbp->sb_bad_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; 453 if (!sbp->sb_features2) 454 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; 455 } 456 457 static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *sbp) 458 { 459 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || 460 (xfs_sb_version_hasmorebits(sbp) && 461 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)); 462 } 463 464 static inline void xfs_sb_version_addprojid32bit(struct xfs_sb *sbp) 465 { 466 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; 467 sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT; 468 sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT; 469 } 470 471 /* 472 * Extended v5 superblock feature masks. These are to be used for new v5 473 * superblock features only. 474 * 475 * Compat features are new features that old kernels will not notice or affect 476 * and so can mount read-write without issues. 477 * 478 * RO-Compat (read only) are features that old kernels can read but will break 479 * if they write. Hence only read-only mounts of such filesystems are allowed on 480 * kernels that don't support the feature bit. 481 * 482 * InCompat features are features which old kernels will not understand and so 483 * must not mount. 484 * 485 * Log-InCompat features are for changes to log formats or new transactions that 486 * can't be replayed on older kernels. The fields are set when the filesystem is 487 * mounted, and a clean unmount clears the fields. 488 */ 489 #define XFS_SB_FEAT_COMPAT_ALL 0 490 #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL 491 static inline bool 492 xfs_sb_has_compat_feature( 493 struct xfs_sb *sbp, 494 __uint32_t feature) 495 { 496 return (sbp->sb_features_compat & feature) != 0; 497 } 498 499 #define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */ 500 #define XFS_SB_FEAT_RO_COMPAT_ALL \ 501 (XFS_SB_FEAT_RO_COMPAT_FINOBT) 502 #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL 503 static inline bool 504 xfs_sb_has_ro_compat_feature( 505 struct xfs_sb *sbp, 506 __uint32_t feature) 507 { 508 return (sbp->sb_features_ro_compat & feature) != 0; 509 } 510 511 #define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */ 512 #define XFS_SB_FEAT_INCOMPAT_ALL \ 513 (XFS_SB_FEAT_INCOMPAT_FTYPE) 514 515 #define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL 516 static inline bool 517 xfs_sb_has_incompat_feature( 518 struct xfs_sb *sbp, 519 __uint32_t feature) 520 { 521 return (sbp->sb_features_incompat & feature) != 0; 522 } 523 524 #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0 525 #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL 526 static inline bool 527 xfs_sb_has_incompat_log_feature( 528 struct xfs_sb *sbp, 529 __uint32_t feature) 530 { 531 return (sbp->sb_features_log_incompat & feature) != 0; 532 } 533 534 /* 535 * V5 superblock specific feature checks 536 */ 537 static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp) 538 { 539 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; 540 } 541 542 static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp) 543 { 544 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; 545 } 546 547 static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp) 548 { 549 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && 550 xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) || 551 (xfs_sb_version_hasmorebits(sbp) && 552 (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE)); 553 } 554 555 static inline int xfs_sb_version_hasfinobt(xfs_sb_t *sbp) 556 { 557 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) && 558 (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT); 559 } 560 561 /* 562 * end of superblock version macros 563 */ 564 565 static inline bool 566 xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino) 567 { 568 return (ino == sbp->sb_uquotino || 569 ino == sbp->sb_gquotino || 570 ino == sbp->sb_pquotino); 571 } 572 573 #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */ 574 #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) 575 #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr)) 576 577 #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) 578 #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ 579 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) 580 #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ 581 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) 582 583 /* 584 * File system sector to basic block conversions. 585 */ 586 #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) 587 588 /* 589 * File system block to basic block conversions. 590 */ 591 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) 592 #define XFS_BB_TO_FSB(mp,bb) \ 593 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) 594 #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) 595 596 /* 597 * File system block to byte conversions. 598 */ 599 #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) 600 #define XFS_B_TO_FSB(mp,b) \ 601 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) 602 #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) 603 #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) 604 605 /* 606 * perag get/put wrappers for ref counting 607 */ 608 extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t); 609 extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t, 610 int tag); 611 extern void xfs_perag_put(struct xfs_perag *pag); 612 extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t); 613 614 extern void xfs_sb_calc_crc(struct xfs_buf *); 615 extern void xfs_mod_sb(struct xfs_trans *, __int64_t); 616 extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *); 617 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 618 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 619 extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp); 620 621 #endif /* __XFS_SB_H__ */ 622