diff options
Diffstat (limited to 'fs/xfs/xfs_ialloc_btree.h')
| -rw-r--r-- | fs/xfs/xfs_ialloc_btree.h | 335 |
1 files changed, 41 insertions, 294 deletions
diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index 44be188674a..d7ebea72c2d 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -1,33 +1,19 @@ /* - * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. + * Copyright (c) 2000,2005 Silicon Graphics, Inc. + * All Rights Reserved. * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * - * This program is distributed in the hope that it would be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. * - * Further, this software is distributed without any warranty that it is - * free of the rightful claim of any third person regarding infringement - * or the like. Any license provided herein, whether implied or - * otherwise, applies only to this software file. Patent licenses, if - * any, provided herein do not apply to combinations of this program with - * other software, or any other product whatsoever. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, - * Mountain View, CA 94043, or: - * - * http://www.sgi.com - * - * For further information regarding this notice, see: - * - * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_IALLOC_BTREE_H__ #define __XFS_IALLOC_BTREE_H__ @@ -38,281 +24,42 @@ struct xfs_buf; struct xfs_btree_cur; -struct xfs_btree_sblock; struct xfs_mount; /* - * There is a btree for the inode map per allocation group. - */ -#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */ - -typedef __uint64_t xfs_inofree_t; -#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t)) -#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3) -#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1) - -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_MASKN) -xfs_inofree_t xfs_inobt_maskn(int i, int n); -#define XFS_INOBT_MASKN(i,n) xfs_inobt_maskn(i,n) -#else -#define XFS_INOBT_MASKN(i,n) \ - ((((n) >= XFS_INODES_PER_CHUNK ? \ - (xfs_inofree_t)0 : ((xfs_inofree_t)1 << (n))) - 1) << (i)) -#endif - -/* - * Data record structure - */ -typedef struct xfs_inobt_rec -{ - xfs_agino_t ir_startino; /* starting inode number */ - __int32_t ir_freecount; /* count of free inodes (set bits) */ - xfs_inofree_t ir_free; /* free inode mask */ -} xfs_inobt_rec_t; - -/* - * Key structure - */ -typedef struct xfs_inobt_key -{ - xfs_agino_t ir_startino; /* starting inode number */ -} xfs_inobt_key_t; - -typedef xfs_agblock_t xfs_inobt_ptr_t; /* btree pointer type */ - /* btree block header type */ -typedef struct xfs_btree_sblock xfs_inobt_block_t; - -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_INOBT_BLOCK) -xfs_inobt_block_t *xfs_buf_to_inobt_block(struct xfs_buf *bp); -#define XFS_BUF_TO_INOBT_BLOCK(bp) xfs_buf_to_inobt_block(bp) -#else -#define XFS_BUF_TO_INOBT_BLOCK(bp) ((xfs_inobt_block_t *)(XFS_BUF_PTR(bp))) -#endif - -/* - * Bit manipulations for ir_free. - */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_MASK) -xfs_inofree_t xfs_inobt_mask(int i); -#define XFS_INOBT_MASK(i) xfs_inobt_mask(i) -#else -#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i)) -#endif -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_IS_FREE) -int xfs_inobt_is_free(xfs_inobt_rec_t *rp, int i); -#define XFS_INOBT_IS_FREE(rp,i) xfs_inobt_is_free(rp,i) -#define XFS_INOBT_IS_FREE_DISK(rp,i) xfs_inobt_is_free_disk(rp,i) -#else -#define XFS_INOBT_IS_FREE(rp,i) \ - (((rp)->ir_free & XFS_INOBT_MASK(i)) != 0) -#define XFS_INOBT_IS_FREE_DISK(rp,i) \ - ((INT_GET((rp)->ir_free, ARCH_CONVERT) & XFS_INOBT_MASK(i)) != 0) -#endif -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_SET_FREE) -void xfs_inobt_set_free(xfs_inobt_rec_t *rp, int i); -#define XFS_INOBT_SET_FREE(rp,i) xfs_inobt_set_free(rp,i) -#else -#define XFS_INOBT_SET_FREE(rp,i) ((rp)->ir_free |= XFS_INOBT_MASK(i)) -#endif -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_CLR_FREE) -void xfs_inobt_clr_free(xfs_inobt_rec_t *rp, int i); -#define XFS_INOBT_CLR_FREE(rp,i) xfs_inobt_clr_free(rp,i) -#else -#define XFS_INOBT_CLR_FREE(rp,i) ((rp)->ir_free &= ~XFS_INOBT_MASK(i)) -#endif - -/* - * Real block structures have a size equal to the disk block size. - */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_SIZE) -int xfs_inobt_block_size(int lev, struct xfs_btree_cur *cur); -#define XFS_INOBT_BLOCK_SIZE(lev,cur) xfs_inobt_block_size(lev,cur) -#else -#define XFS_INOBT_BLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog) -#endif - -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_MAXRECS) -int xfs_inobt_block_maxrecs(int lev, struct xfs_btree_cur *cur); -#define XFS_INOBT_BLOCK_MAXRECS(lev,cur) xfs_inobt_block_maxrecs(lev,cur) -#else -#define XFS_INOBT_BLOCK_MAXRECS(lev,cur) \ - ((cur)->bc_mp->m_inobt_mxr[lev != 0]) -#endif -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_MINRECS) -int xfs_inobt_block_minrecs(int lev, struct xfs_btree_cur *cur); -#define XFS_INOBT_BLOCK_MINRECS(lev,cur) xfs_inobt_block_minrecs(lev,cur) -#else -#define XFS_INOBT_BLOCK_MINRECS(lev,cur) \ - ((cur)->bc_mp->m_inobt_mnr[lev != 0]) -#endif - -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_IS_LAST_REC) -int xfs_inobt_is_last_rec(struct xfs_btree_cur *cur); -#define XFS_INOBT_IS_LAST_REC(cur) xfs_inobt_is_last_rec(cur) -#else -#define XFS_INOBT_IS_LAST_REC(cur) \ - ((cur)->bc_ptrs[0] == \ - INT_GET(XFS_BUF_TO_INOBT_BLOCK((cur)->bc_bufs[0])->bb_numrecs, ARCH_CONVERT)) -#endif - -/* - * Maximum number of inode btree levels. - */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IN_MAXLEVELS) -int xfs_in_maxlevels(struct xfs_mount *mp); -#define XFS_IN_MAXLEVELS(mp) xfs_in_maxlevels(mp) -#else -#define XFS_IN_MAXLEVELS(mp) ((mp)->m_in_maxlevels) -#endif - -/* - * block numbers in the AG. + * Btree block header size depends on a superblock flag. */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IBT_BLOCK) -xfs_agblock_t xfs_ibt_block(struct xfs_mount *mp); -#define XFS_IBT_BLOCK(mp) xfs_ibt_block(mp) -#else -#define XFS_IBT_BLOCK(mp) ((xfs_agblock_t)(XFS_CNT_BLOCK(mp) + 1)) -#endif -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_PREALLOC_BLOCKS) -xfs_agblock_t xfs_prealloc_blocks(struct xfs_mount *mp); -#define XFS_PREALLOC_BLOCKS(mp) xfs_prealloc_blocks(mp) -#else -#define XFS_PREALLOC_BLOCKS(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1)) -#endif +#define XFS_INOBT_BLOCK_LEN(mp) \ + (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ + XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN) /* * Record, key, and pointer address macros for btree blocks. - */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_REC_ADDR) -xfs_inobt_rec_t * -xfs_inobt_rec_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur); -#define XFS_INOBT_REC_ADDR(bb,i,cur) xfs_inobt_rec_addr(bb,i,cur) -#else -#define XFS_INOBT_REC_ADDR(bb,i,cur) \ - XFS_BTREE_REC_ADDR(XFS_INOBT_BLOCK_SIZE(0,cur), xfs_inobt, bb, i, \ - XFS_INOBT_BLOCK_MAXRECS(0, cur)) -#endif - -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_KEY_ADDR) -xfs_inobt_key_t * -xfs_inobt_key_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur); -#define XFS_INOBT_KEY_ADDR(bb,i,cur) xfs_inobt_key_addr(bb,i,cur) -#else -#define XFS_INOBT_KEY_ADDR(bb,i,cur) \ - XFS_BTREE_KEY_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, i, \ - XFS_INOBT_BLOCK_MAXRECS(1, cur)) -#endif - -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_PTR_ADDR) -xfs_inobt_ptr_t * -xfs_inobt_ptr_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur); -#define XFS_INOBT_PTR_ADDR(bb,i,cur) xfs_inobt_ptr_addr(bb,i,cur) -#else -#define XFS_INOBT_PTR_ADDR(bb,i,cur) \ - XFS_BTREE_PTR_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, i, \ - XFS_INOBT_BLOCK_MAXRECS(1, cur)) -#endif - -/* - * Prototypes for externally visible routines. - */ - -/* - * Decrement cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_inobt_decrement( - struct xfs_btree_cur *cur, /* btree cursor */ - int level, /* level in btree, 0 is leaf */ - int *stat); /* success/failure */ - -/* - * Delete the record pointed to by cur. - * The cursor refers to the place where the record was (could be inserted) - * when the operation returns. - */ -int /* error */ -xfs_inobt_delete( - struct xfs_btree_cur *cur, /* btree cursor */ - int *stat); /* success/failure */ - -/* - * Get the data from the pointed-to record. - */ -int /* error */ -xfs_inobt_get_rec( - struct xfs_btree_cur *cur, /* btree cursor */ - xfs_agino_t *ino, /* output: starting inode of chunk */ - __int32_t *fcnt, /* output: number of free inodes */ - xfs_inofree_t *free, /* output: free inode mask */ - int *stat); /* output: success/failure */ - -/* - * Increment cursor by one record at the level. - * For nonzero levels the leaf-ward information is untouched. - */ -int /* error */ -xfs_inobt_increment( - struct xfs_btree_cur *cur, /* btree cursor */ - int level, /* level in btree, 0 is leaf */ - int *stat); /* success/failure */ - -/* - * Insert the current record at the point referenced by cur. - * The cursor may be inconsistent on return if splits have been done. - */ -int /* error */ -xfs_inobt_insert( - struct xfs_btree_cur *cur, /* btree cursor */ - int *stat); /* success/failure */ - -/* - * Lookup the record equal to ino in the btree given by cur. - */ -int /* error */ -xfs_inobt_lookup_eq( - struct xfs_btree_cur *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free, /* free inode mask */ - int *stat); /* success/failure */ - -/* - * Lookup the first record greater than or equal to ino - * in the btree given by cur. - */ -int /* error */ -xfs_inobt_lookup_ge( - struct xfs_btree_cur *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free, /* free inode mask */ - int *stat); /* success/failure */ - -/* - * Lookup the first record less than or equal to ino - * in the btree given by cur. - */ -int /* error */ -xfs_inobt_lookup_le( - struct xfs_btree_cur *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free, /* free inode mask */ - int *stat); /* success/failure */ - -/* - * Update the record referred to by cur, to the value given - * by [ino, fcnt, free]. - * This either works (return 0) or gets an EFSCORRUPTED error. - */ -int /* error */ -xfs_inobt_update( - struct xfs_btree_cur *cur, /* btree cursor */ - xfs_agino_t ino, /* starting inode of chunk */ - __int32_t fcnt, /* free inode count */ - xfs_inofree_t free); /* free inode mask */ + * + * (note that some of these may appear unused, but they are used in userspace) + */ +#define XFS_INOBT_REC_ADDR(mp, block, index) \ + ((xfs_inobt_rec_t *) \ + ((char *)(block) + \ + XFS_INOBT_BLOCK_LEN(mp) + \ + (((index) - 1) * sizeof(xfs_inobt_rec_t)))) + +#define XFS_INOBT_KEY_ADDR(mp, block, index) \ + ((xfs_inobt_key_t *) \ + ((char *)(block) + \ + XFS_INOBT_BLOCK_LEN(mp) + \ + ((index) - 1) * sizeof(xfs_inobt_key_t))) + +#define XFS_INOBT_PTR_ADDR(mp, block, index, maxrecs) \ + ((xfs_inobt_ptr_t *) \ + ((char *)(block) + \ + XFS_INOBT_BLOCK_LEN(mp) + \ + (maxrecs) * sizeof(xfs_inobt_key_t) + \ + ((index) - 1) * sizeof(xfs_inobt_ptr_t))) + +extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, + struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t, + xfs_btnum_t); +extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int); #endif /* __XFS_IALLOC_BTREE_H__ */ |