libxfs: move source files

Move all the source files that are shared with userspace into
libxfs/. This is done as one big chunk simpy to get it done
quickly

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

1 files changed, 422 insertions, 0 deletions

diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.c b/fs/xfs/libxfs/xfs_ialloc_btree.c
new file mode 100644
index 000000000000..726f83a681a5
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_ialloc_btree.c
@@ -0,0 +1,422 @@
+/*
+ * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * 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.  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_bit.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_alloc.h"
+#include "xfs_error.h"
+#include "xfs_trace.h"
+#include "xfs_cksum.h"
+#include "xfs_trans.h"
+
+
+STATIC int
+xfs_inobt_get_minrecs(
+        struct xfs_btree_cur    *cur,
+        int                     level)
+{
+        return cur->bc_mp->m_inobt_mnr[level != 0];
+}
+
+STATIC struct xfs_btree_cur *
+xfs_inobt_dup_cursor(
+        struct xfs_btree_cur    *cur)
+{
+        return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp,
+                        cur->bc_private.a.agbp, cur->bc_private.a.agno,
+                        cur->bc_btnum);
+}
+
+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 void
+xfs_finobt_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_free_root = nptr->s;
+        be32_add_cpu(&agi->agi_free_level, inc);
+        xfs_ialloc_log_agi(cur->bc_tp, agbp,
+                           XFS_AGI_FREE_ROOT | XFS_AGI_FREE_LEVEL);
+}
+
+STATIC int
+xfs_inobt_alloc_block(
+        struct xfs_btree_cur    *cur,
+        union xfs_btree_ptr     *start,
+        union xfs_btree_ptr     *new,
+        int                     *stat)
+{
+        xfs_alloc_arg_t         args;           /* block allocation args */
+        int                     error;          /* error return value */
+        xfs_agblock_t           sbno = be32_to_cpu(start->s);
+
+        XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
+
+        memset(&args, 0, sizeof(args));
+        args.tp = cur->bc_tp;
+        args.mp = cur->bc_mp;
+        args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, sbno);
+        args.minlen = 1;
+        args.maxlen = 1;
+        args.prod = 1;
+        args.type = XFS_ALLOCTYPE_NEAR_BNO;
+
+        error = xfs_alloc_vextent(&args);
+        if (error) {
+                XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
+                return error;
+        }
+        if (args.fsbno == NULLFSBLOCK) {
+                XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
+                *stat = 0;
+                return 0;
+        }
+        ASSERT(args.len == 1);
+        XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
+
+        new->s = cpu_to_be32(XFS_FSB_TO_AGBNO(args.mp, args.fsbno));
+        *stat = 1;
+        return 0;
+}
+
+STATIC int
+xfs_inobt_free_block(
+        struct xfs_btree_cur    *cur,
+        struct xfs_buf          *bp)
+{
+        xfs_fsblock_t           fsbno;
+        int                     error;
+
+        fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(bp));
+        error = xfs_free_extent(cur->bc_tp, fsbno, 1);
+        if (error)
+                return error;
+
+        xfs_trans_binval(cur->bc_tp, bp);
+        return error;
+}
+
+STATIC int
+xfs_inobt_get_maxrecs(
+        struct xfs_btree_cur    *cur,
+        int                     level)
+{
+        return cur->bc_mp->m_inobt_mxr[level != 0];
+}
+
+STATIC void
+xfs_inobt_init_key_from_rec(
+        union xfs_btree_key     *key,
+        union xfs_btree_rec     *rec)
+{
+        key->inobt.ir_startino = rec->inobt.ir_startino;
+}
+
+STATIC void
+xfs_inobt_init_rec_from_key(
+        union xfs_btree_key     *key,
+        union xfs_btree_rec     *rec)
+{
+        rec->inobt.ir_startino = key->inobt.ir_startino;
+}
+
+STATIC void
+xfs_inobt_init_rec_from_cur(
+        struct xfs_btree_cur    *cur,
+        union xfs_btree_rec     *rec)
+{
+        rec->inobt.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino);
+        rec->inobt.ir_freecount = cpu_to_be32(cur->bc_rec.i.ir_freecount);
+        rec->inobt.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free);
+}
+
+/*
+ * initial value of ptr for lookup
+ */
+STATIC void
+xfs_inobt_init_ptr_from_cur(
+        struct xfs_btree_cur    *cur,
+        union xfs_btree_ptr     *ptr)
+{
+        struct xfs_agi          *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
+
+        ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
+
+        ptr->s = agi->agi_root;
+}
+
+STATIC void
+xfs_finobt_init_ptr_from_cur(
+        struct xfs_btree_cur    *cur,
+        union xfs_btree_ptr     *ptr)
+{
+        struct xfs_agi          *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
+
+        ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
+        ptr->s = agi->agi_free_root;
+}
+
+STATIC __int64_t
+xfs_inobt_key_diff(
+        struct xfs_btree_cur    *cur,
+        union xfs_btree_key     *key)
+{
+        return (__int64_t)be32_to_cpu(key->inobt.ir_startino) -
+                          cur->bc_rec.i.ir_startino;
+}
+
+static int
+xfs_inobt_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;
+
+        /*
+         * During growfs operations, we can't verify the exact owner as the
+         * perag is not fully initialised and hence not attached to the buffer.
+         *
+         * Similarly, during log recovery we will have a perag structure
+         * attached, but the agi information will not yet have been initialised
+         * from the on disk AGI. We don't currently use any of this information,
+         * but beware of the landmine (i.e. need to check pag->pagi_init) if we
+         * ever do.
+         */
+        switch (block->bb_magic) {
+        case cpu_to_be32(XFS_IBT_CRC_MAGIC):
+        case cpu_to_be32(XFS_FIBT_CRC_MAGIC):
+                if (!xfs_sb_version_hascrc(&mp->m_sb))
+                        return false;
+                if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_uuid))
+                        return false;
+                if (block->bb_u.s.bb_blkno != cpu_to_be64(bp->b_bn))
+                        return false;
+                if (pag &&
+                    be32_to_cpu(block->bb_u.s.bb_owner) != pag->pag_agno)
+                        return false;
+                /* fall through */
+        case cpu_to_be32(XFS_IBT_MAGIC):
+        case cpu_to_be32(XFS_FIBT_MAGIC):
+                break;
+        default:
+                return 0;
+        }
+
+        /* numrecs and level verification */
+        level = be16_to_cpu(block->bb_level);
+        if (level >= mp->m_in_maxlevels)
+                return false;
+        if (be16_to_cpu(block->bb_numrecs) > mp->m_inobt_mxr[level != 0])
+                return false;
+
+        /* sibling pointer verification */
+        if (!block->bb_u.s.bb_leftsib ||
+            (be32_to_cpu(block->bb_u.s.bb_leftsib) >= mp->m_sb.sb_agblocks &&
+             block->bb_u.s.bb_leftsib != cpu_to_be32(NULLAGBLOCK)))
+                return false;
+        if (!block->bb_u.s.bb_rightsib ||
+            (be32_to_cpu(block->bb_u.s.bb_rightsib) >= mp->m_sb.sb_agblocks &&
+             block->bb_u.s.bb_rightsib != cpu_to_be32(NULLAGBLOCK)))
+                return false;
+
+        return true;
+}
+
+static void
+xfs_inobt_read_verify(
+        struct xfs_buf  *bp)
+{
+        if (!xfs_btree_sblock_verify_crc(bp))
+                xfs_buf_ioerror(bp, EFSBADCRC);
+        else if (!xfs_inobt_verify(bp))
+                xfs_buf_ioerror(bp, EFSCORRUPTED);
+
+        if (bp->b_error) {
+                trace_xfs_btree_corrupt(bp, _RET_IP_);
+                xfs_verifier_error(bp);
+        }
+}
+
+static void
+xfs_inobt_write_verify(
+        struct xfs_buf  *bp)
+{
+        if (!xfs_inobt_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);
+
+}
+
+const struct xfs_buf_ops xfs_inobt_buf_ops = {
+        .verify_read = xfs_inobt_read_verify,
+        .verify_write = xfs_inobt_write_verify,
+};
+
+#if defined(DEBUG) || defined(XFS_WARN)
+STATIC int
+xfs_inobt_keys_inorder(
+        struct xfs_btree_cur    *cur,
+        union xfs_btree_key     *k1,
+        union xfs_btree_key     *k2)
+{
+        return be32_to_cpu(k1->inobt.ir_startino) <
+                be32_to_cpu(k2->inobt.ir_startino);
+}
+
+STATIC int
+xfs_inobt_recs_inorder(
+        struct xfs_btree_cur    *cur,
+        union xfs_btree_rec     *r1,
+        union xfs_btree_rec     *r2)
+{
+        return be32_to_cpu(r1->inobt.ir_startino) + XFS_INODES_PER_CHUNK <=
+                be32_to_cpu(r2->inobt.ir_startino);
+}
+#endif  /* DEBUG */
+
+static const struct xfs_btree_ops xfs_inobt_ops = {
+        .rec_len                = sizeof(xfs_inobt_rec_t),
+        .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,
+        .free_block             = xfs_inobt_free_block,
+        .get_minrecs            = xfs_inobt_get_minrecs,
+        .get_maxrecs            = xfs_inobt_get_maxrecs,
+        .init_key_from_rec      = xfs_inobt_init_key_from_rec,
+        .init_rec_from_key      = xfs_inobt_init_rec_from_key,
+        .init_rec_from_cur      = xfs_inobt_init_rec_from_cur,
+        .init_ptr_from_cur      = xfs_inobt_init_ptr_from_cur,
+        .key_diff               = xfs_inobt_key_diff,
+        .buf_ops                = &xfs_inobt_buf_ops,
+#if defined(DEBUG) || defined(XFS_WARN)
+        .keys_inorder           = xfs_inobt_keys_inorder,
+        .recs_inorder           = xfs_inobt_recs_inorder,
+#endif
+};
+
+static const struct xfs_btree_ops xfs_finobt_ops = {
+        .rec_len                = sizeof(xfs_inobt_rec_t),
+        .key_len                = sizeof(xfs_inobt_key_t),
+
+        .dup_cursor             = xfs_inobt_dup_cursor,
+        .set_root               = xfs_finobt_set_root,
+        .alloc_block            = xfs_inobt_alloc_block,
+        .free_block             = xfs_inobt_free_block,
+        .get_minrecs            = xfs_inobt_get_minrecs,
+        .get_maxrecs            = xfs_inobt_get_maxrecs,
+        .init_key_from_rec      = xfs_inobt_init_key_from_rec,
+        .init_rec_from_key      = xfs_inobt_init_rec_from_key,
+        .init_rec_from_cur      = xfs_inobt_init_rec_from_cur,
+        .init_ptr_from_cur      = xfs_finobt_init_ptr_from_cur,
+        .key_diff               = xfs_inobt_key_diff,
+        .buf_ops                = &xfs_inobt_buf_ops,
+#if defined(DEBUG) || defined(XFS_WARN)
+        .keys_inorder           = xfs_inobt_keys_inorder,
+        .recs_inorder           = xfs_inobt_recs_inorder,
+#endif
+};
+
+/*
+ * Allocate a new inode btree cursor.
+ */
+struct xfs_btree_cur *                          /* new inode btree cursor */
+xfs_inobt_init_cursor(
+        struct xfs_mount        *mp,            /* file system mount point */
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_buf          *agbp,          /* buffer for agi structure */
+        xfs_agnumber_t          agno,           /* allocation group number */
+        xfs_btnum_t             btnum)          /* ialloc or free ino btree */
+{
+        struct xfs_agi          *agi = XFS_BUF_TO_AGI(agbp);
+        struct xfs_btree_cur    *cur;
+
+        cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
+
+        cur->bc_tp = tp;
+        cur->bc_mp = mp;
+        cur->bc_btnum = btnum;
+        if (btnum == XFS_BTNUM_INO) {
+                cur->bc_nlevels = be32_to_cpu(agi->agi_level);
+                cur->bc_ops = &xfs_inobt_ops;
+        } else {
+                cur->bc_nlevels = be32_to_cpu(agi->agi_free_level);
+                cur->bc_ops = &xfs_finobt_ops;
+        }
+
+        cur->bc_blocklog = mp->m_sb.sb_blocklog;
+
+        if (xfs_sb_version_hascrc(&mp->m_sb))
+                cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
+
+        cur->bc_private.a.agbp = agbp;
+        cur->bc_private.a.agno = agno;
+
+        return cur;
+}
+
+/*
+ * Calculate number of records in an inobt btree block.
+ */
+int
+xfs_inobt_maxrecs(
+        struct xfs_mount        *mp,
+        int                     blocklen,
+        int                     leaf)
+{
+        blocklen -= XFS_INOBT_BLOCK_LEN(mp);
+
+        if (leaf)
+                return blocklen / sizeof(xfs_inobt_rec_t);
+        return blocklen / (sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t));
+}