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 27struct xfs_buf; 28struct xfs_mount; 29 30#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */ 31#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */ 32#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ 33#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ 34#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ 35#define XFS_SB_VERSION_NUMBITS 0x000f 36#define XFS_SB_VERSION_ALLFBITS 0xfff0 37#define XFS_SB_VERSION_SASHFBITS 0xf000 38#define XFS_SB_VERSION_REALFBITS 0x0ff0 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#define XFS_SB_VERSION_OKSASHFBITS \ 52 (XFS_SB_VERSION_EXTFLGBIT | \ 53 XFS_SB_VERSION_DIRV2BIT | \ 54 XFS_SB_VERSION_BORGBIT) 55#define XFS_SB_VERSION_OKREALFBITS \ 56 (XFS_SB_VERSION_ATTRBIT | \ 57 XFS_SB_VERSION_NLINKBIT | \ 58 XFS_SB_VERSION_QUOTABIT | \ 59 XFS_SB_VERSION_ALIGNBIT | \ 60 XFS_SB_VERSION_DALIGNBIT | \ 61 XFS_SB_VERSION_SHAREDBIT | \ 62 XFS_SB_VERSION_LOGV2BIT | \ 63 XFS_SB_VERSION_SECTORBIT | \ 64 XFS_SB_VERSION_MOREBITSBIT) 65#define XFS_SB_VERSION_OKREALBITS \ 66 (XFS_SB_VERSION_NUMBITS | \ 67 XFS_SB_VERSION_OKREALFBITS | \ 68 XFS_SB_VERSION_OKSASHFBITS) 69 70/* 71 * There are two words to hold XFS "feature" bits: the original 72 * word, sb_versionnum, and sb_features2. Whenever a bit is set in 73 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set. 74 * 75 * These defines represent bits in sb_features2. 76 */ 77#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */ 78#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 79#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ 80#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 81#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ 82#define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ 83 84#define XFS_SB_VERSION2_OKREALFBITS \ 85 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ 86 XFS_SB_VERSION2_ATTR2BIT) 87#define XFS_SB_VERSION2_OKSASHFBITS \ 88 (0) 89#define XFS_SB_VERSION2_OKREALBITS \ 90 (XFS_SB_VERSION2_OKREALFBITS | \ 91 XFS_SB_VERSION2_OKSASHFBITS ) 92 93/* 94 * Superblock - in core version. Must match the ondisk version below. 95 * Must be padded to 64 bit alignment. 96 */ 97typedef struct xfs_sb { 98 __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ 99 __uint32_t sb_blocksize; /* logical block size, bytes */ 100 xfs_drfsbno_t sb_dblocks; /* number of data blocks */ 101 xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */ 102 xfs_drtbno_t sb_rextents; /* number of realtime extents */ 103 uuid_t sb_uuid; /* file system unique id */ 104 xfs_dfsbno_t sb_logstart; /* starting block of log if internal */ 105 xfs_ino_t sb_rootino; /* root inode number */ 106 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ 107 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ 108 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ 109 xfs_agblock_t sb_agblocks; /* size of an allocation group */ 110 xfs_agnumber_t sb_agcount; /* number of allocation groups */ 111 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ 112 xfs_extlen_t sb_logblocks; /* number of log blocks */ 113 __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ 114 __uint16_t sb_sectsize; /* volume sector size, bytes */ 115 __uint16_t sb_inodesize; /* inode size, bytes */ 116 __uint16_t sb_inopblock; /* inodes per block */ 117 char sb_fname[12]; /* file system name */ 118 __uint8_t sb_blocklog; /* log2 of sb_blocksize */ 119 __uint8_t sb_sectlog; /* log2 of sb_sectsize */ 120 __uint8_t sb_inodelog; /* log2 of sb_inodesize */ 121 __uint8_t sb_inopblog; /* log2 of sb_inopblock */ 122 __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ 123 __uint8_t sb_rextslog; /* log2 of sb_rextents */ 124 __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ 125 __uint8_t sb_imax_pct; /* max % of fs for inode space */ 126 /* statistics */ 127 /* 128 * These fields must remain contiguous. If you really 129 * want to change their layout, make sure you fix the 130 * code in xfs_trans_apply_sb_deltas(). 131 */ 132 __uint64_t sb_icount; /* allocated inodes */ 133 __uint64_t sb_ifree; /* free inodes */ 134 __uint64_t sb_fdblocks; /* free data blocks */ 135 __uint64_t sb_frextents; /* free realtime extents */ 136 /* 137 * End contiguous fields. 138 */ 139 xfs_ino_t sb_uquotino; /* user quota inode */ 140 xfs_ino_t sb_gquotino; /* group quota inode */ 141 __uint16_t sb_qflags; /* quota flags */ 142 __uint8_t sb_flags; /* misc. flags */ 143 __uint8_t sb_shared_vn; /* shared version number */ 144 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ 145 __uint32_t sb_unit; /* stripe or raid unit */ 146 __uint32_t sb_width; /* stripe or raid width */ 147 __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ 148 __uint8_t sb_logsectlog; /* log2 of the log sector size */ 149 __uint16_t sb_logsectsize; /* sector size for the log, bytes */ 150 __uint32_t sb_logsunit; /* stripe unit size for the log */ 151 __uint32_t sb_features2; /* additional feature bits */ 152 153 /* 154 * bad features2 field as a result of failing to pad the sb 155 * structure to 64 bits. Some machines will be using this field 156 * for features2 bits. Easiest just to mark it bad and not use 157 * it for anything else. 158 */ 159 __uint32_t sb_bad_features2; 160 161 /* must be padded to 64 bit alignment */ 162} xfs_sb_t; 163 164/* 165 * Superblock - on disk version. Must match the in core version above. 166 * Must be padded to 64 bit alignment. 167 */ 168typedef struct xfs_dsb { 169 __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */ 170 __be32 sb_blocksize; /* logical block size, bytes */ 171 __be64 sb_dblocks; /* number of data blocks */ 172 __be64 sb_rblocks; /* number of realtime blocks */ 173 __be64 sb_rextents; /* number of realtime extents */ 174 uuid_t sb_uuid; /* file system unique id */ 175 __be64 sb_logstart; /* starting block of log if internal */ 176 __be64 sb_rootino; /* root inode number */ 177 __be64 sb_rbmino; /* bitmap inode for realtime extents */ 178 __be64 sb_rsumino; /* summary inode for rt bitmap */ 179 __be32 sb_rextsize; /* realtime extent size, blocks */ 180 __be32 sb_agblocks; /* size of an allocation group */ 181 __be32 sb_agcount; /* number of allocation groups */ 182 __be32 sb_rbmblocks; /* number of rt bitmap blocks */ 183 __be32 sb_logblocks; /* number of log blocks */ 184 __be16 sb_versionnum; /* header version == XFS_SB_VERSION */ 185 __be16 sb_sectsize; /* volume sector size, bytes */ 186 __be16 sb_inodesize; /* inode size, bytes */ 187 __be16 sb_inopblock; /* inodes per block */ 188 char sb_fname[12]; /* file system name */ 189 __u8 sb_blocklog; /* log2 of sb_blocksize */ 190 __u8 sb_sectlog; /* log2 of sb_sectsize */ 191 __u8 sb_inodelog; /* log2 of sb_inodesize */ 192 __u8 sb_inopblog; /* log2 of sb_inopblock */ 193 __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */ 194 __u8 sb_rextslog; /* log2 of sb_rextents */ 195 __u8 sb_inprogress; /* mkfs is in progress, don't mount */ 196 __u8 sb_imax_pct; /* max % of fs for inode space */ 197 /* statistics */ 198 /* 199 * These fields must remain contiguous. If you really 200 * want to change their layout, make sure you fix the 201 * code in xfs_trans_apply_sb_deltas(). 202 */ 203 __be64 sb_icount; /* allocated inodes */ 204 __be64 sb_ifree; /* free inodes */ 205 __be64 sb_fdblocks; /* free data blocks */ 206 __be64 sb_frextents; /* free realtime extents */ 207 /* 208 * End contiguous fields. 209 */ 210 __be64 sb_uquotino; /* user quota inode */ 211 __be64 sb_gquotino; /* group quota inode */ 212 __be16 sb_qflags; /* quota flags */ 213 __u8 sb_flags; /* misc. flags */ 214 __u8 sb_shared_vn; /* shared version number */ 215 __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */ 216 __be32 sb_unit; /* stripe or raid unit */ 217 __be32 sb_width; /* stripe or raid width */ 218 __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */ 219 __u8 sb_logsectlog; /* log2 of the log sector size */ 220 __be16 sb_logsectsize; /* sector size for the log, bytes */ 221 __be32 sb_logsunit; /* stripe unit size for the log */ 222 __be32 sb_features2; /* additional feature bits */ 223 /* 224 * bad features2 field as a result of failing to pad the sb 225 * structure to 64 bits. Some machines will be using this field 226 * for features2 bits. Easiest just to mark it bad and not use 227 * it for anything else. 228 */ 229 __be32 sb_bad_features2; 230 231 /* must be padded to 64 bit alignment */ 232} xfs_dsb_t; 233 234/* 235 * Sequence number values for the fields. 236 */ 237typedef enum { 238 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS, 239 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO, 240 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS, 241 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS, 242 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE, 243 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG, 244 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG, 245 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT, 246 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO, 247 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, 248 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, 249 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, 250 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, 251 XFS_SBS_FIELDCOUNT 252} xfs_sb_field_t; 253 254/* 255 * Mask values, defined based on the xfs_sb_field_t values. 256 * Only define the ones we're using. 257 */ 258#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x) 259#define XFS_SB_UUID XFS_SB_MVAL(UUID) 260#define XFS_SB_FNAME XFS_SB_MVAL(FNAME) 261#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO) 262#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO) 263#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO) 264#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM) 265#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO) 266#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO) 267#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS) 268#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN) 269#define XFS_SB_UNIT XFS_SB_MVAL(UNIT) 270#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH) 271#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT) 272#define XFS_SB_IFREE XFS_SB_MVAL(IFREE) 273#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) 274#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) 275#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) 276#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) 277#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) 278#define XFS_SB_MOD_BITS \ 279 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \ 280 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ 281 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ 282 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ 283 XFS_SB_BAD_FEATURES2) 284 285 286/* 287 * Misc. Flags - warning - these will be cleared by xfs_repair unless 288 * a feature bit is set when the flag is used. 289 */ 290#define XFS_SBF_NOFLAGS 0x00 /* no flags set */ 291#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ 292 293/* 294 * define max. shared version we can interoperate with 295 */ 296#define XFS_SB_MAX_SHARED_VN 0 297 298#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) 299 300static inline int xfs_sb_good_version(xfs_sb_t *sbp) 301{ 302 /* We always support version 1-3 */ 303 if (sbp->sb_versionnum >= XFS_SB_VERSION_1 && 304 sbp->sb_versionnum <= XFS_SB_VERSION_3) 305 return 1; 306 307 /* We support version 4 if all feature bits are supported */ 308 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) { 309 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || 310 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && 311 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) 312 return 0; 313 314#ifdef __KERNEL__ 315 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) 316 return 0; 317#else 318 if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) && 319 sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) 320 return 0; 321#endif 322 323 return 1; 324 } 325 326 return 0; 327} 328 329/* 330 * Detect a mismatched features2 field. Older kernels read/wrote 331 * this into the wrong slot, so to be safe we keep them in sync. 332 */ 333static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp) 334{ 335 return (sbp->sb_bad_features2 != sbp->sb_features2); 336} 337 338static inline unsigned xfs_sb_version_tonew(unsigned v) 339{ 340 if (v == XFS_SB_VERSION_1) 341 return XFS_SB_VERSION_4; 342 343 if (v == XFS_SB_VERSION_2) 344 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; 345 346 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT | 347 XFS_SB_VERSION_NLINKBIT; 348} 349 350static inline unsigned xfs_sb_version_toold(unsigned v) 351{ 352 if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) 353 return 0; 354 if (v & XFS_SB_VERSION_NLINKBIT) 355 return XFS_SB_VERSION_3; 356 if (v & XFS_SB_VERSION_ATTRBIT) 357 return XFS_SB_VERSION_2; 358 return XFS_SB_VERSION_1; 359} 360 361static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp) 362{ 363 return sbp->sb_versionnum == XFS_SB_VERSION_2 || 364 sbp->sb_versionnum == XFS_SB_VERSION_3 || 365 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 366 (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)); 367} 368 369static inline void xfs_sb_version_addattr(xfs_sb_t *sbp) 370{ 371 if (sbp->sb_versionnum == XFS_SB_VERSION_1) 372 sbp->sb_versionnum = XFS_SB_VERSION_2; 373 else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) 374 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; 375 else 376 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; 377} 378 379static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp) 380{ 381 return sbp->sb_versionnum == XFS_SB_VERSION_3 || 382 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 383 (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)); 384} 385 386static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp) 387{ 388 if (sbp->sb_versionnum <= XFS_SB_VERSION_2) 389 sbp->sb_versionnum = XFS_SB_VERSION_3; 390 else 391 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT; 392} 393 394static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp) 395{ 396 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 397 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); 398} 399 400static inline void xfs_sb_version_addquota(xfs_sb_t *sbp) 401{ 402 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) 403 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; 404 else 405 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) | 406 XFS_SB_VERSION_QUOTABIT; 407} 408 409static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp) 410{ 411 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 412 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT); 413} 414 415static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp) 416{ 417 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 418 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); 419} 420 421static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp) 422{ 423 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 424 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT); 425} 426 427static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp) 428{ 429 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 430 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT); 431} 432 433static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp) 434{ 435 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 436 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT); 437} 438 439static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp) 440{ 441 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 442 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT); 443} 444 445static inline int xfs_sb_version_hassector(xfs_sb_t *sbp) 446{ 447 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 448 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); 449} 450 451static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp) 452{ 453 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 454 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); 455} 456 457static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp) 458{ 459 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && 460 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT); 461} 462 463/* 464 * sb_features2 bit version macros. 465 * 466 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro: 467 * 468 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp) 469 * ((xfs_sb_version_hasmorebits(sbp) && 470 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT) 471 */ 472 473static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp) 474{ 475 return xfs_sb_version_hasmorebits(sbp) && 476 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT); 477} 478 479static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp) 480{ 481 return xfs_sb_version_hasmorebits(sbp) && 482 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT); 483} 484 485static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp) 486{ 487 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; 488 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; 489} 490 491static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp) 492{ 493 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; 494 if (!sbp->sb_features2) 495 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; 496} 497 498/* 499 * end of superblock version macros 500 */ 501 502#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */ 503#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) 504#define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)XFS_BUF_PTR(bp)) 505 506#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) 507#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ 508 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) 509#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ 510 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) 511 512/* 513 * File system sector to basic block conversions. 514 */ 515#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) 516 517/* 518 * File system block to basic block conversions. 519 */ 520#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) 521#define XFS_BB_TO_FSB(mp,bb) \ 522 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) 523#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) 524#define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1)) 525 526/* 527 * File system block to byte conversions. 528 */ 529#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) 530#define XFS_B_TO_FSB(mp,b) \ 531 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) 532#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) 533#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) 534 535#endif /* __XFS_SB_H__ */ 536