Release 4.11 fs/xfs/libxfs/xfs_refcount_btree.c
/*
* Copyright (C) 2016 Oracle. All Rights Reserved.
*
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* 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.
*
* 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.
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_sb.h"
#include "xfs_mount.h"
#include "xfs_btree.h"
#include "xfs_bmap.h"
#include "xfs_refcount_btree.h"
#include "xfs_alloc.h"
#include "xfs_error.h"
#include "xfs_trace.h"
#include "xfs_cksum.h"
#include "xfs_trans.h"
#include "xfs_bit.h"
#include "xfs_rmap.h"
static struct xfs_btree_cur *
xfs_refcountbt_dup_cursor(
struct xfs_btree_cur *cur)
{
return xfs_refcountbt_init_cursor(cur->bc_mp, cur->bc_tp,
cur->bc_private.a.agbp, cur->bc_private.a.agno,
cur->bc_private.a.dfops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
STATIC void
xfs_refcountbt_set_root(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr,
int inc)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno);
struct xfs_perag *pag = xfs_perag_get(cur->bc_mp, seqno);
ASSERT(ptr->s != 0);
agf->agf_refcount_root = ptr->s;
be32_add_cpu(&agf->agf_refcount_level, inc);
pag->pagf_refcount_level += inc;
xfs_perag_put(pag);
xfs_alloc_log_agf(cur->bc_tp, agbp,
XFS_AGF_REFCOUNT_ROOT | XFS_AGF_REFCOUNT_LEVEL);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 117 | 100.00% | 1 | 100.00% |
| Total | 117 | 100.00% | 1 | 100.00% |
STATIC int
xfs_refcountbt_alloc_block(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *start,
union xfs_btree_ptr *new,
int *stat)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
struct xfs_alloc_arg args; /* block allocation args */
int error; /* error return value */
XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
memset(&args, 0, sizeof(args));
args.tp = cur->bc_tp;
args.mp = cur->bc_mp;
args.type = XFS_ALLOCTYPE_NEAR_BNO;
args.fsbno = XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_private.a.agno,
xfs_refc_block(args.mp));
args.firstblock = args.fsbno;
xfs_rmap_ag_owner(&args.oinfo, XFS_RMAP_OWN_REFC);
args.minlen = args.maxlen = args.prod = 1;
args.resv = XFS_AG_RESV_METADATA;
error = xfs_alloc_vextent(&args);
if (error)
goto out_error;
trace_xfs_refcountbt_alloc_block(cur->bc_mp, cur->bc_private.a.agno,
args.agbno, 1);
if (args.fsbno == NULLFSBLOCK) {
XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
*stat = 0;
return 0;
}
ASSERT(args.agno == cur->bc_private.a.agno);
ASSERT(args.len == 1);
new->s = cpu_to_be32(args.agbno);
be32_add_cpu(&agf->agf_refcount_blocks, 1);
xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_REFCOUNT_BLOCKS);
XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
*stat = 1;
return 0;
out_error:
XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 307 | 100.00% | 2 | 100.00% |
| Total | 307 | 100.00% | 2 | 100.00% |
STATIC int
xfs_refcountbt_free_block(
struct xfs_btree_cur *cur,
struct xfs_buf *bp)
{
struct xfs_mount *mp = cur->bc_mp;
struct xfs_buf *agbp = cur->bc_private.a.agbp;
struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp));
struct xfs_owner_info oinfo;
int error;
trace_xfs_refcountbt_free_block(cur->bc_mp, cur->bc_private.a.agno,
XFS_FSB_TO_AGBNO(cur->bc_mp, fsbno), 1);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_REFC);
be32_add_cpu(&agf->agf_refcount_blocks, -1);
xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_REFCOUNT_BLOCKS);
error = xfs_free_extent(cur->bc_tp, fsbno, 1, &oinfo,
XFS_AG_RESV_METADATA);
if (error)
return error;
return error;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 152 | 100.00% | 2 | 100.00% |
| Total | 152 | 100.00% | 2 | 100.00% |
STATIC int
xfs_refcountbt_get_minrecs(
struct xfs_btree_cur *cur,
int level)
{
return cur->bc_mp->m_refc_mnr[level != 0];
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 26 | 100.00% | 1 | 100.00% |
| Total | 26 | 100.00% | 1 | 100.00% |
STATIC int
xfs_refcountbt_get_maxrecs(
struct xfs_btree_cur *cur,
int level)
{
return cur->bc_mp->m_refc_mxr[level != 0];
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 26 | 100.00% | 1 | 100.00% |
| Total | 26 | 100.00% | 1 | 100.00% |
STATIC void
xfs_refcountbt_init_key_from_rec(
union xfs_btree_key *key,
union xfs_btree_rec *rec)
{
key->refc.rc_startblock = rec->refc.rc_startblock;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
STATIC void
xfs_refcountbt_init_high_key_from_rec(
union xfs_btree_key *key,
union xfs_btree_rec *rec)
{
__u32 x;
x = be32_to_cpu(rec->refc.rc_startblock);
x += be32_to_cpu(rec->refc.rc_blockcount) - 1;
key->refc.rc_startblock = cpu_to_be32(x);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 54 | 100.00% | 1 | 100.00% |
| Total | 54 | 100.00% | 1 | 100.00% |
STATIC void
xfs_refcountbt_init_rec_from_cur(
struct xfs_btree_cur *cur,
union xfs_btree_rec *rec)
{
rec->refc.rc_startblock = cpu_to_be32(cur->bc_rec.rc.rc_startblock);
rec->refc.rc_blockcount = cpu_to_be32(cur->bc_rec.rc.rc_blockcount);
rec->refc.rc_refcount = cpu_to_be32(cur->bc_rec.rc.rc_refcount);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 67 | 100.00% | 2 | 100.00% |
| Total | 67 | 100.00% | 2 | 100.00% |
STATIC void
xfs_refcountbt_init_ptr_from_cur(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp);
ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno));
ASSERT(agf->agf_refcount_root != 0);
ptr->s = agf->agf_refcount_root;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 67 | 100.00% | 2 | 100.00% |
| Total | 67 | 100.00% | 2 | 100.00% |
STATIC __int64_t
xfs_refcountbt_key_diff(
struct xfs_btree_cur *cur,
union xfs_btree_key *key)
{
struct xfs_refcount_irec *rec = &cur->bc_rec.rc;
struct xfs_refcount_key *kp = &key->refc;
return (__int64_t)be32_to_cpu(kp->rc_startblock) - rec->rc_startblock;
}
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| Darrick J. Wong | 53 | 100.00% | 2 | 100.00% |
| Total | 53 | 100.00% | 2 | 100.00% |
STATIC __int64_t
xfs_refcountbt_diff_two_keys(
struct xfs_btree_cur *cur,
union xfs_btree_key *k1,
union xfs_btree_key *k2)
{
return (__int64_t)be32_to_cpu(k1->refc.rc_startblock) -
be32_to_cpu(k2->refc.rc_startblock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 43 | 100.00% | 2 | 100.00% |
| Total | 43 | 100.00% | 2 | 100.00% |
STATIC bool
xfs_refcountbt_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
struct xfs_perag *pag = bp->b_pag;
unsigned int level;
if (block->bb_magic != cpu_to_be32(XFS_REFC_CRC_MAGIC))
return false;
if (!xfs_sb_version_hasreflink(&mp->m_sb))
return false;
if (!xfs_btree_sblock_v5hdr_verify(bp))
return false;
level = be16_to_cpu(block->bb_level);
if (pag && pag->pagf_init) {
if (level >= pag->pagf_refcount_level)
return false;
} else if (level >= mp->m_refc_maxlevels)
return false;
return xfs_btree_sblock_verify(bp, mp->m_refc_mxr[level != 0]);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 141 | 100.00% | 1 | 100.00% |
| Total | 141 | 100.00% | 1 | 100.00% |
STATIC void
xfs_refcountbt_read_verify(
struct xfs_buf *bp)
{
if (!xfs_btree_sblock_verify_crc(bp))
xfs_buf_ioerror(bp, -EFSBADCRC);
else if (!xfs_refcountbt_verify(bp))
xfs_buf_ioerror(bp, -EFSCORRUPTED);
if (bp->b_error) {
trace_xfs_btree_corrupt(bp, _RET_IP_);
xfs_verifier_error(bp);
}
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 64 | 100.00% | 1 | 100.00% |
| Total | 64 | 100.00% | 1 | 100.00% |
STATIC void
xfs_refcountbt_write_verify(
struct xfs_buf *bp)
{
if (!xfs_refcountbt_verify(bp)) {
trace_xfs_btree_corrupt(bp, _RET_IP_);
xfs_buf_ioerror(bp, -EFSCORRUPTED);
xfs_verifier_error(bp);
return;
}
xfs_btree_sblock_calc_crc(bp);
}
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| Darrick J. Wong | 47 | 100.00% | 1 | 100.00% |
| Total | 47 | 100.00% | 1 | 100.00% |
const struct xfs_buf_ops xfs_refcountbt_buf_ops = {
.name = "xfs_refcountbt",
.verify_read = xfs_refcountbt_read_verify,
.verify_write = xfs_refcountbt_write_verify,
};
#if defined(DEBUG) || defined(XFS_WARN)
STATIC int
xfs_refcountbt_keys_inorder(
struct xfs_btree_cur *cur,
union xfs_btree_key *k1,
union xfs_btree_key *k2)
{
return be32_to_cpu(k1->refc.rc_startblock) <
be32_to_cpu(k2->refc.rc_startblock);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 40 | 100.00% | 1 | 100.00% |
| Total | 40 | 100.00% | 1 | 100.00% |
STATIC int
xfs_refcountbt_recs_inorder(
struct xfs_btree_cur *cur,
union xfs_btree_rec *r1,
union xfs_btree_rec *r2)
{
return be32_to_cpu(r1->refc.rc_startblock) +
be32_to_cpu(r1->refc.rc_blockcount) <=
be32_to_cpu(r2->refc.rc_startblock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
#endif
static const struct xfs_btree_ops xfs_refcountbt_ops = {
.rec_len = sizeof(struct xfs_refcount_rec),
.key_len = sizeof(struct xfs_refcount_key),
.dup_cursor = xfs_refcountbt_dup_cursor,
.set_root = xfs_refcountbt_set_root,
.alloc_block = xfs_refcountbt_alloc_block,
.free_block = xfs_refcountbt_free_block,
.get_minrecs = xfs_refcountbt_get_minrecs,
.get_maxrecs = xfs_refcountbt_get_maxrecs,
.init_key_from_rec = xfs_refcountbt_init_key_from_rec,
.init_high_key_from_rec = xfs_refcountbt_init_high_key_from_rec,
.init_rec_from_cur = xfs_refcountbt_init_rec_from_cur,
.init_ptr_from_cur = xfs_refcountbt_init_ptr_from_cur,
.key_diff = xfs_refcountbt_key_diff,
.buf_ops = &xfs_refcountbt_buf_ops,
.diff_two_keys = xfs_refcountbt_diff_two_keys,
#if defined(DEBUG) || defined(XFS_WARN)
.keys_inorder = xfs_refcountbt_keys_inorder,
.recs_inorder = xfs_refcountbt_recs_inorder,
#endif
};
/*
* Allocate a new refcount btree cursor.
*/
struct xfs_btree_cur *
xfs_refcountbt_init_cursor(
struct xfs_mount *mp,
struct xfs_trans *tp,
struct xfs_buf *agbp,
xfs_agnumber_t agno,
struct xfs_defer_ops *dfops)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
struct xfs_btree_cur *cur;
ASSERT(agno != NULLAGNUMBER);
ASSERT(agno < mp->m_sb.sb_agcount);
cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_NOFS);
cur->bc_tp = tp;
cur->bc_mp = mp;
cur->bc_btnum = XFS_BTNUM_REFC;
cur->bc_blocklog = mp->m_sb.sb_blocklog;
cur->bc_ops = &xfs_refcountbt_ops;
cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_refcbt_2);
cur->bc_nlevels = be32_to_cpu(agf->agf_refcount_level);
cur->bc_private.a.agbp = agbp;
cur->bc_private.a.agno = agno;
cur->bc_private.a.dfops = dfops;
cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
cur->bc_private.a.priv.refc.nr_ops = 0;
cur->bc_private.a.priv.refc.shape_changes = 0;
return cur;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 185 | 95.36% | 1 | 50.00% |
| Dave Chinner | 9 | 4.64% | 1 | 50.00% |
| Total | 194 | 100.00% | 2 | 100.00% |
/*
* Calculate the number of records in a refcount btree block.
*/
int
xfs_refcountbt_maxrecs(
struct xfs_mount *mp,
int blocklen,
bool leaf)
{
blocklen -= XFS_REFCOUNT_BLOCK_LEN;
if (leaf)
return blocklen / sizeof(struct xfs_refcount_rec);
return blocklen / (sizeof(struct xfs_refcount_key) +
sizeof(xfs_refcount_ptr_t));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 49 | 100.00% | 1 | 100.00% |
| Total | 49 | 100.00% | 1 | 100.00% |
/* Compute the maximum height of a refcount btree. */
void
xfs_refcountbt_compute_maxlevels(
struct xfs_mount *mp)
{
mp->m_refc_maxlevels = xfs_btree_compute_maxlevels(mp,
mp->m_refc_mnr, mp->m_sb.sb_agblocks);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
/* Calculate the refcount btree size for some records. */
xfs_extlen_t
xfs_refcountbt_calc_size(
struct xfs_mount *mp,
unsigned long long len)
{
return xfs_btree_calc_size(mp, mp->m_refc_mnr, len);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 27 | 100.00% | 1 | 100.00% |
| Total | 27 | 100.00% | 1 | 100.00% |
/*
* Calculate the maximum refcount btree size.
*/
xfs_extlen_t
xfs_refcountbt_max_size(
struct xfs_mount *mp,
xfs_agblock_t agblocks)
{
/* Bail out if we're uninitialized, which can happen in mkfs. */
if (mp->m_refc_mxr[0] == 0)
return 0;
return xfs_refcountbt_calc_size(mp, agblocks);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 36 | 100.00% | 2 | 100.00% |
| Total | 36 | 100.00% | 2 | 100.00% |
/*
* Figure out how many blocks to reserve and how many are used by this btree.
*/
int
xfs_refcountbt_calc_reserves(
struct xfs_mount *mp,
xfs_agnumber_t agno,
xfs_extlen_t *ask,
xfs_extlen_t *used)
{
struct xfs_buf *agbp;
struct xfs_agf *agf;
xfs_agblock_t agblocks;
xfs_extlen_t tree_len;
int error;
if (!xfs_sb_version_hasreflink(&mp->m_sb))
return 0;
error = xfs_alloc_read_agf(mp, NULL, agno, 0, &agbp);
if (error)
return error;
agf = XFS_BUF_TO_AGF(agbp);
agblocks = be32_to_cpu(agf->agf_length);
tree_len = be32_to_cpu(agf->agf_refcount_blocks);
xfs_buf_relse(agbp);
*ask += xfs_refcountbt_max_size(mp, agblocks);
*used += tree_len;
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 125 | 100.00% | 2 | 100.00% |
| Total | 125 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Darrick J. Wong | 1993 | 99.55% | 4 | 80.00% |
| Dave Chinner | 9 | 0.45% | 1 | 20.00% |
| Total | 2002 | 100.00% | 5 | 100.00% |
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