xfs_sb.h 17 KB

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  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. * Super block
  22. * Fits into a sector-sized buffer at address 0 of each allocation group.
  23. * Only the first of these is ever updated except during growfs.
  24. */
  25. struct xfs_buf;
  26. struct xfs_mount;
  27. #define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
  28. #define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
  29. #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
  30. #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
  31. #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
  32. #define XFS_SB_VERSION_NUMBITS 0x000f
  33. #define XFS_SB_VERSION_ALLFBITS 0xfff0
  34. #define XFS_SB_VERSION_SASHFBITS 0xf000
  35. #define XFS_SB_VERSION_REALFBITS 0x0ff0
  36. #define XFS_SB_VERSION_ATTRBIT 0x0010
  37. #define XFS_SB_VERSION_NLINKBIT 0x0020
  38. #define XFS_SB_VERSION_QUOTABIT 0x0040
  39. #define XFS_SB_VERSION_ALIGNBIT 0x0080
  40. #define XFS_SB_VERSION_DALIGNBIT 0x0100
  41. #define XFS_SB_VERSION_SHAREDBIT 0x0200
  42. #define XFS_SB_VERSION_LOGV2BIT 0x0400
  43. #define XFS_SB_VERSION_SECTORBIT 0x0800
  44. #define XFS_SB_VERSION_EXTFLGBIT 0x1000
  45. #define XFS_SB_VERSION_DIRV2BIT 0x2000
  46. #define XFS_SB_VERSION_MOREBITSBIT 0x8000
  47. #define XFS_SB_VERSION_OKSASHFBITS \
  48. (XFS_SB_VERSION_EXTFLGBIT | \
  49. XFS_SB_VERSION_DIRV2BIT)
  50. #define XFS_SB_VERSION_OKREALFBITS \
  51. (XFS_SB_VERSION_ATTRBIT | \
  52. XFS_SB_VERSION_NLINKBIT | \
  53. XFS_SB_VERSION_QUOTABIT | \
  54. XFS_SB_VERSION_ALIGNBIT | \
  55. XFS_SB_VERSION_DALIGNBIT | \
  56. XFS_SB_VERSION_SHAREDBIT | \
  57. XFS_SB_VERSION_LOGV2BIT | \
  58. XFS_SB_VERSION_SECTORBIT | \
  59. XFS_SB_VERSION_MOREBITSBIT)
  60. #define XFS_SB_VERSION_OKREALBITS \
  61. (XFS_SB_VERSION_NUMBITS | \
  62. XFS_SB_VERSION_OKREALFBITS | \
  63. XFS_SB_VERSION_OKSASHFBITS)
  64. /*
  65. * There are two words to hold XFS "feature" bits: the original
  66. * word, sb_versionnum, and sb_features2. Whenever a bit is set in
  67. * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
  68. *
  69. * These defines represent bits in sb_features2.
  70. */
  71. #define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
  72. #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
  73. #define XFS_SB_VERSION2_RESERVED2BIT 0x00000002
  74. #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
  75. #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
  76. #define XFS_SB_VERSION2_OKREALFBITS \
  77. (XFS_SB_VERSION2_ATTR2BIT)
  78. #define XFS_SB_VERSION2_OKSASHFBITS \
  79. (0)
  80. #define XFS_SB_VERSION2_OKREALBITS \
  81. (XFS_SB_VERSION2_OKREALFBITS | \
  82. XFS_SB_VERSION2_OKSASHFBITS )
  83. typedef struct xfs_sb
  84. {
  85. __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
  86. __uint32_t sb_blocksize; /* logical block size, bytes */
  87. xfs_drfsbno_t sb_dblocks; /* number of data blocks */
  88. xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
  89. xfs_drtbno_t sb_rextents; /* number of realtime extents */
  90. uuid_t sb_uuid; /* file system unique id */
  91. xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
  92. xfs_ino_t sb_rootino; /* root inode number */
  93. xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
  94. xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
  95. xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
  96. xfs_agblock_t sb_agblocks; /* size of an allocation group */
  97. xfs_agnumber_t sb_agcount; /* number of allocation groups */
  98. xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
  99. xfs_extlen_t sb_logblocks; /* number of log blocks */
  100. __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
  101. __uint16_t sb_sectsize; /* volume sector size, bytes */
  102. __uint16_t sb_inodesize; /* inode size, bytes */
  103. __uint16_t sb_inopblock; /* inodes per block */
  104. char sb_fname[12]; /* file system name */
  105. __uint8_t sb_blocklog; /* log2 of sb_blocksize */
  106. __uint8_t sb_sectlog; /* log2 of sb_sectsize */
  107. __uint8_t sb_inodelog; /* log2 of sb_inodesize */
  108. __uint8_t sb_inopblog; /* log2 of sb_inopblock */
  109. __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
  110. __uint8_t sb_rextslog; /* log2 of sb_rextents */
  111. __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
  112. __uint8_t sb_imax_pct; /* max % of fs for inode space */
  113. /* statistics */
  114. /*
  115. * These fields must remain contiguous. If you really
  116. * want to change their layout, make sure you fix the
  117. * code in xfs_trans_apply_sb_deltas().
  118. */
  119. __uint64_t sb_icount; /* allocated inodes */
  120. __uint64_t sb_ifree; /* free inodes */
  121. __uint64_t sb_fdblocks; /* free data blocks */
  122. __uint64_t sb_frextents; /* free realtime extents */
  123. /*
  124. * End contiguous fields.
  125. */
  126. xfs_ino_t sb_uquotino; /* user quota inode */
  127. xfs_ino_t sb_gquotino; /* group quota inode */
  128. __uint16_t sb_qflags; /* quota flags */
  129. __uint8_t sb_flags; /* misc. flags */
  130. __uint8_t sb_shared_vn; /* shared version number */
  131. xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
  132. __uint32_t sb_unit; /* stripe or raid unit */
  133. __uint32_t sb_width; /* stripe or raid width */
  134. __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
  135. __uint8_t sb_logsectlog; /* log2 of the log sector size */
  136. __uint16_t sb_logsectsize; /* sector size for the log, bytes */
  137. __uint32_t sb_logsunit; /* stripe unit size for the log */
  138. __uint32_t sb_features2; /* additional feature bits */
  139. } xfs_sb_t;
  140. /*
  141. * Sequence number values for the fields.
  142. */
  143. typedef enum {
  144. XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
  145. XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
  146. XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
  147. XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
  148. XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
  149. XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
  150. XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
  151. XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
  152. XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
  153. XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
  154. XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
  155. XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
  156. XFS_SBS_FEATURES2,
  157. XFS_SBS_FIELDCOUNT
  158. } xfs_sb_field_t;
  159. /*
  160. * Mask values, defined based on the xfs_sb_field_t values.
  161. * Only define the ones we're using.
  162. */
  163. #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
  164. #define XFS_SB_UUID XFS_SB_MVAL(UUID)
  165. #define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
  166. #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
  167. #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
  168. #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
  169. #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
  170. #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
  171. #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
  172. #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
  173. #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
  174. #define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
  175. #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
  176. #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
  177. #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
  178. #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
  179. #define XFS_SB_MOD_BITS \
  180. (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
  181. XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
  182. XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
  183. XFS_SB_FEATURES2)
  184. /*
  185. * Misc. Flags - warning - these will be cleared by xfs_repair unless
  186. * a feature bit is set when the flag is used.
  187. */
  188. #define XFS_SBF_NOFLAGS 0x00 /* no flags set */
  189. #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
  190. /*
  191. * define max. shared version we can interoperate with
  192. */
  193. #define XFS_SB_MAX_SHARED_VN 0
  194. #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
  195. #define XFS_SB_GOOD_VERSION(sbp) xfs_sb_good_version(sbp)
  196. #ifdef __KERNEL__
  197. static inline int xfs_sb_good_version(xfs_sb_t *sbp)
  198. {
  199. return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
  200. (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
  201. ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  202. !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
  203. ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
  204. (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
  205. (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
  206. }
  207. #else
  208. static inline int xfs_sb_good_version(xfs_sb_t *sbp)
  209. {
  210. return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
  211. (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
  212. ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  213. !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
  214. ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
  215. (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
  216. (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
  217. (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
  218. }
  219. #endif /* __KERNEL__ */
  220. #define XFS_SB_VERSION_TONEW(v) xfs_sb_version_tonew(v)
  221. static inline unsigned xfs_sb_version_tonew(unsigned v)
  222. {
  223. return ((((v) == XFS_SB_VERSION_1) ? \
  224. 0 : \
  225. (((v) == XFS_SB_VERSION_2) ? \
  226. XFS_SB_VERSION_ATTRBIT : \
  227. (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
  228. XFS_SB_VERSION_4);
  229. }
  230. #define XFS_SB_VERSION_TOOLD(v) xfs_sb_version_toold(v)
  231. static inline unsigned xfs_sb_version_toold(unsigned v)
  232. {
  233. return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
  234. 0 : \
  235. (((v) & XFS_SB_VERSION_NLINKBIT) ? \
  236. XFS_SB_VERSION_3 : \
  237. (((v) & XFS_SB_VERSION_ATTRBIT) ? \
  238. XFS_SB_VERSION_2 : \
  239. XFS_SB_VERSION_1)));
  240. }
  241. #define XFS_SB_VERSION_HASATTR(sbp) xfs_sb_version_hasattr(sbp)
  242. static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
  243. {
  244. return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
  245. ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
  246. ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  247. ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
  248. }
  249. #define XFS_SB_VERSION_ADDATTR(sbp) xfs_sb_version_addattr(sbp)
  250. static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
  251. {
  252. (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
  253. XFS_SB_VERSION_2 : \
  254. ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
  255. ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
  256. (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
  257. }
  258. #define XFS_SB_VERSION_HASNLINK(sbp) xfs_sb_version_hasnlink(sbp)
  259. static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
  260. {
  261. return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
  262. ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  263. ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
  264. }
  265. #define XFS_SB_VERSION_ADDNLINK(sbp) xfs_sb_version_addnlink(sbp)
  266. static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
  267. {
  268. (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
  269. XFS_SB_VERSION_3 : \
  270. ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
  271. }
  272. #define XFS_SB_VERSION_HASQUOTA(sbp) xfs_sb_version_hasquota(sbp)
  273. static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
  274. {
  275. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  276. ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
  277. }
  278. #define XFS_SB_VERSION_ADDQUOTA(sbp) xfs_sb_version_addquota(sbp)
  279. static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
  280. {
  281. (sbp)->sb_versionnum = \
  282. (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
  283. ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
  284. (XFS_SB_VERSION_TONEW((sbp)->sb_versionnum) | \
  285. XFS_SB_VERSION_QUOTABIT));
  286. }
  287. #define XFS_SB_VERSION_HASALIGN(sbp) xfs_sb_version_hasalign(sbp)
  288. static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
  289. {
  290. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  291. ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
  292. }
  293. #define XFS_SB_VERSION_SUBALIGN(sbp) xfs_sb_version_subalign(sbp)
  294. static inline void xfs_sb_version_subalign(xfs_sb_t *sbp)
  295. {
  296. (sbp)->sb_versionnum = \
  297. XFS_SB_VERSION_TOOLD((sbp)->sb_versionnum & ~XFS_SB_VERSION_ALIGNBIT);
  298. }
  299. #define XFS_SB_VERSION_HASDALIGN(sbp) xfs_sb_version_hasdalign(sbp)
  300. static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
  301. {
  302. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  303. ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
  304. }
  305. #define XFS_SB_VERSION_ADDDALIGN(sbp) xfs_sb_version_adddalign(sbp)
  306. static inline int xfs_sb_version_adddalign(xfs_sb_t *sbp)
  307. {
  308. return (sbp)->sb_versionnum = \
  309. ((sbp)->sb_versionnum | XFS_SB_VERSION_DALIGNBIT);
  310. }
  311. #define XFS_SB_VERSION_HASSHARED(sbp) xfs_sb_version_hasshared(sbp)
  312. static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
  313. {
  314. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  315. ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
  316. }
  317. #define XFS_SB_VERSION_ADDSHARED(sbp) xfs_sb_version_addshared(sbp)
  318. static inline int xfs_sb_version_addshared(xfs_sb_t *sbp)
  319. {
  320. return (sbp)->sb_versionnum = \
  321. ((sbp)->sb_versionnum | XFS_SB_VERSION_SHAREDBIT);
  322. }
  323. #define XFS_SB_VERSION_SUBSHARED(sbp) xfs_sb_version_subshared(sbp)
  324. static inline int xfs_sb_version_subshared(xfs_sb_t *sbp)
  325. {
  326. return (sbp)->sb_versionnum = \
  327. ((sbp)->sb_versionnum & ~XFS_SB_VERSION_SHAREDBIT);
  328. }
  329. #define XFS_SB_VERSION_HASDIRV2(sbp) xfs_sb_version_hasdirv2(sbp)
  330. static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
  331. {
  332. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  333. ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
  334. }
  335. #define XFS_SB_VERSION_HASLOGV2(sbp) xfs_sb_version_haslogv2(sbp)
  336. static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
  337. {
  338. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  339. ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
  340. }
  341. #define XFS_SB_VERSION_HASEXTFLGBIT(sbp) xfs_sb_version_hasextflgbit(sbp)
  342. static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
  343. {
  344. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  345. ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
  346. }
  347. #define XFS_SB_VERSION_ADDEXTFLGBIT(sbp) xfs_sb_version_addextflgbit(sbp)
  348. static inline int xfs_sb_version_addextflgbit(xfs_sb_t *sbp)
  349. {
  350. return (sbp)->sb_versionnum = \
  351. ((sbp)->sb_versionnum | XFS_SB_VERSION_EXTFLGBIT);
  352. }
  353. #define XFS_SB_VERSION_SUBEXTFLGBIT(sbp) xfs_sb_version_subextflgbit(sbp)
  354. static inline int xfs_sb_version_subextflgbit(xfs_sb_t *sbp)
  355. {
  356. return (sbp)->sb_versionnum = \
  357. ((sbp)->sb_versionnum & ~XFS_SB_VERSION_EXTFLGBIT);
  358. }
  359. #define XFS_SB_VERSION_HASSECTOR(sbp) xfs_sb_version_hassector(sbp)
  360. static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
  361. {
  362. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  363. ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
  364. }
  365. #define XFS_SB_VERSION_HASMOREBITS(sbp) xfs_sb_version_hasmorebits(sbp)
  366. static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
  367. {
  368. return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
  369. ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
  370. }
  371. /*
  372. * sb_features2 bit version macros.
  373. *
  374. * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
  375. *
  376. * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
  377. * ((XFS_SB_VERSION_HASMOREBITS(sbp) &&
  378. * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
  379. */
  380. #define XFS_SB_VERSION_HASATTR2(sbp) xfs_sb_version_hasattr2(sbp)
  381. static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
  382. {
  383. return (XFS_SB_VERSION_HASMOREBITS(sbp)) && \
  384. ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
  385. }
  386. #define XFS_SB_VERSION_ADDATTR2(sbp) xfs_sb_version_addattr2(sbp)
  387. static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
  388. {
  389. ((sbp)->sb_versionnum = \
  390. ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT), \
  391. ((sbp)->sb_features2 = \
  392. ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
  393. }
  394. /*
  395. * end of superblock version macros
  396. */
  397. #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
  398. #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
  399. #define XFS_BUF_TO_SBP(bp) ((xfs_sb_t *)XFS_BUF_PTR(bp))
  400. #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
  401. #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
  402. XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
  403. #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
  404. XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
  405. /*
  406. * File system sector to basic block conversions.
  407. */
  408. #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
  409. /*
  410. * File system block to basic block conversions.
  411. */
  412. #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
  413. #define XFS_BB_TO_FSB(mp,bb) \
  414. (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
  415. #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
  416. #define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
  417. /*
  418. * File system block to byte conversions.
  419. */
  420. #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
  421. #define XFS_B_TO_FSB(mp,b) \
  422. ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
  423. #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
  424. #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
  425. #endif /* __XFS_SB_H__ */