diff options
author | Christoph Hellwig <hch@infradead.org> | 2008-10-30 16:57:16 +1100 |
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committer | Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 16:57:16 +1100 |
commit | 344207ce8474b79be331eb93e6df4cb5bdd48ab2 (patch) | |
tree | 7858f63c359e2695a6c368a73b078ff183345922 /fs/xfs/xfs_ialloc_btree.c | |
parent | f5eb8e7ca58bc1e92436614444006120d21668ba (diff) | |
download | kernel_samsung_aries-344207ce8474b79be331eb93e6df4cb5bdd48ab2.zip kernel_samsung_aries-344207ce8474b79be331eb93e6df4cb5bdd48ab2.tar.gz kernel_samsung_aries-344207ce8474b79be331eb93e6df4cb5bdd48ab2.tar.bz2 |
[XFS] implement semi-generic xfs_btree_new_root
From: Dave Chinner <dgc@sgi.com>
Add a xfs_btree_new_root helper for the alloc and ialloc btrees. The bmap
btree needs it's own version and is not converted.
[hch: split out from bigger patch and minor adaptions]
SGI-PV: 985583
SGI-Modid: xfs-linux-melb:xfs-kern:32200a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Bill O'Donnell <billodo@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_ialloc_btree.c')
-rw-r--r-- | fs/xfs/xfs_ialloc_btree.c | 164 |
1 files changed, 16 insertions, 148 deletions
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index c76190a..7ba3c7b 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -44,7 +44,6 @@ STATIC void xfs_inobt_log_block(xfs_trans_t *, xfs_buf_t *, int); STATIC void xfs_inobt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int); STATIC void xfs_inobt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int); STATIC void xfs_inobt_log_recs(xfs_btree_cur_t *, xfs_buf_t *, int, int); -STATIC int xfs_inobt_newroot(xfs_btree_cur_t *, int *); /* * Single level of the xfs_inobt_delete record deletion routine. @@ -556,7 +555,7 @@ xfs_inobt_insrec( * and we're done. */ if (level >= cur->bc_nlevels) { - error = xfs_inobt_newroot(cur, &i); + error = xfs_btree_new_root(cur, &i); *bnop = NULLAGBLOCK; *stat = i; return error; @@ -827,152 +826,6 @@ xfs_inobt_log_recs( xfs_trans_log_buf(cur->bc_tp, bp, first, last); } -/* - * Allocate a new root block, fill it in. - */ -STATIC int /* error */ -xfs_inobt_newroot( - xfs_btree_cur_t *cur, /* btree cursor */ - int *stat) /* success/failure */ -{ - xfs_agi_t *agi; /* a.g. inode header */ - xfs_alloc_arg_t args; /* allocation argument structure */ - xfs_inobt_block_t *block; /* one half of the old root block */ - xfs_buf_t *bp; /* buffer containing block */ - int error; /* error return value */ - xfs_inobt_key_t *kp; /* btree key pointer */ - xfs_agblock_t lbno; /* left block number */ - xfs_buf_t *lbp; /* left buffer pointer */ - xfs_inobt_block_t *left; /* left btree block */ - xfs_buf_t *nbp; /* new (root) buffer */ - xfs_inobt_block_t *new; /* new (root) btree block */ - int nptr; /* new value for key index, 1 or 2 */ - xfs_inobt_ptr_t *pp; /* btree address pointer */ - xfs_agblock_t rbno; /* right block number */ - xfs_buf_t *rbp; /* right buffer pointer */ - xfs_inobt_block_t *right; /* right btree block */ - xfs_inobt_rec_t *rp; /* btree record pointer */ - - ASSERT(cur->bc_nlevels < XFS_IN_MAXLEVELS(cur->bc_mp)); - - /* - * Get a block & a buffer. - */ - agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp); - args.tp = cur->bc_tp; - args.mp = cur->bc_mp; - args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, - be32_to_cpu(agi->agi_root)); - args.mod = args.minleft = args.alignment = args.total = args.wasdel = - args.isfl = args.userdata = args.minalignslop = 0; - args.minlen = args.maxlen = args.prod = 1; - args.type = XFS_ALLOCTYPE_NEAR_BNO; - if ((error = xfs_alloc_vextent(&args))) - return error; - /* - * None available, we fail. - */ - if (args.fsbno == NULLFSBLOCK) { - *stat = 0; - return 0; - } - ASSERT(args.len == 1); - nbp = xfs_btree_get_bufs(args.mp, args.tp, args.agno, args.agbno, 0); - new = XFS_BUF_TO_INOBT_BLOCK(nbp); - /* - * Set the root data in the a.g. inode structure. - */ - agi->agi_root = cpu_to_be32(args.agbno); - be32_add_cpu(&agi->agi_level, 1); - xfs_ialloc_log_agi(args.tp, cur->bc_private.a.agbp, - XFS_AGI_ROOT | XFS_AGI_LEVEL); - /* - * At the previous root level there are now two blocks: the old - * root, and the new block generated when it was split. - * We don't know which one the cursor is pointing at, so we - * set up variables "left" and "right" for each case. - */ - bp = cur->bc_bufs[cur->bc_nlevels - 1]; - block = XFS_BUF_TO_INOBT_BLOCK(bp); -#ifdef DEBUG - if ((error = xfs_btree_check_sblock(cur, block, cur->bc_nlevels - 1, bp))) - return error; -#endif - if (be32_to_cpu(block->bb_rightsib) != NULLAGBLOCK) { - /* - * Our block is left, pick up the right block. - */ - lbp = bp; - lbno = XFS_DADDR_TO_AGBNO(args.mp, XFS_BUF_ADDR(lbp)); - left = block; - rbno = be32_to_cpu(left->bb_rightsib); - if ((error = xfs_btree_read_bufs(args.mp, args.tp, args.agno, - rbno, 0, &rbp, XFS_INO_BTREE_REF))) - return error; - bp = rbp; - right = XFS_BUF_TO_INOBT_BLOCK(rbp); - if ((error = xfs_btree_check_sblock(cur, right, - cur->bc_nlevels - 1, rbp))) - return error; - nptr = 1; - } else { - /* - * Our block is right, pick up the left block. - */ - rbp = bp; - rbno = XFS_DADDR_TO_AGBNO(args.mp, XFS_BUF_ADDR(rbp)); - right = block; - lbno = be32_to_cpu(right->bb_leftsib); - if ((error = xfs_btree_read_bufs(args.mp, args.tp, args.agno, - lbno, 0, &lbp, XFS_INO_BTREE_REF))) - return error; - bp = lbp; - left = XFS_BUF_TO_INOBT_BLOCK(lbp); - if ((error = xfs_btree_check_sblock(cur, left, - cur->bc_nlevels - 1, lbp))) - return error; - nptr = 2; - } - /* - * Fill in the new block's btree header and log it. - */ - new->bb_magic = cpu_to_be32(xfs_magics[cur->bc_btnum]); - new->bb_level = cpu_to_be16(cur->bc_nlevels); - new->bb_numrecs = cpu_to_be16(2); - new->bb_leftsib = cpu_to_be32(NULLAGBLOCK); - new->bb_rightsib = cpu_to_be32(NULLAGBLOCK); - xfs_inobt_log_block(args.tp, nbp, XFS_BB_ALL_BITS); - ASSERT(lbno != NULLAGBLOCK && rbno != NULLAGBLOCK); - /* - * Fill in the key data in the new root. - */ - kp = XFS_INOBT_KEY_ADDR(new, 1, cur); - if (be16_to_cpu(left->bb_level) > 0) { - kp[0] = *XFS_INOBT_KEY_ADDR(left, 1, cur); - kp[1] = *XFS_INOBT_KEY_ADDR(right, 1, cur); - } else { - rp = XFS_INOBT_REC_ADDR(left, 1, cur); - kp[0].ir_startino = rp->ir_startino; - rp = XFS_INOBT_REC_ADDR(right, 1, cur); - kp[1].ir_startino = rp->ir_startino; - } - xfs_inobt_log_keys(cur, nbp, 1, 2); - /* - * Fill in the pointer data in the new root. - */ - pp = XFS_INOBT_PTR_ADDR(new, 1, cur); - pp[0] = cpu_to_be32(lbno); - pp[1] = cpu_to_be32(rbno); - xfs_inobt_log_ptrs(cur, nbp, 1, 2); - /* - * Fix up the cursor. - */ - xfs_btree_setbuf(cur, cur->bc_nlevels, nbp); - cur->bc_ptrs[cur->bc_nlevels] = nptr; - cur->bc_nlevels++; - *stat = 1; - return 0; -} /* * Externally visible routines. @@ -1128,6 +981,20 @@ xfs_inobt_dup_cursor( cur->bc_private.a.agbp, cur->bc_private.a.agno); } +STATIC void +xfs_inobt_set_root( + struct xfs_btree_cur *cur, + union xfs_btree_ptr *nptr, + int inc) /* level change */ +{ + struct xfs_buf *agbp = cur->bc_private.a.agbp; + struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); + + agi->agi_root = nptr->s; + be32_add_cpu(&agi->agi_level, inc); + xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL); +} + STATIC int xfs_inobt_alloc_block( struct xfs_btree_cur *cur, @@ -1281,6 +1148,7 @@ static const struct xfs_btree_ops xfs_inobt_ops = { .key_len = sizeof(xfs_inobt_key_t), .dup_cursor = xfs_inobt_dup_cursor, + .set_root = xfs_inobt_set_root, .alloc_block = xfs_inobt_alloc_block, .get_maxrecs = xfs_inobt_get_maxrecs, .init_key_from_rec = xfs_inobt_init_key_from_rec, |