From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Add a new btree function that enables us to bulk load a btree cursor.
This will be used by the upcoming online repair patches to generate new
btrees.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_btree.c | 566 +++++++++++++++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_btree.h | 43 +++
fs/xfs/xfs_trace.c | 1
fs/xfs/xfs_trace.h | 85 +++++++
4 files changed, 694 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index 4b06d5d86834..17b0fdb87729 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -1382,7 +1382,7 @@ STATIC void
xfs_btree_copy_ptrs(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *dst_ptr,
- union xfs_btree_ptr *src_ptr,
+ const union xfs_btree_ptr *src_ptr,
int numptrs)
{
ASSERT(numptrs >= 0);
@@ -5104,3 +5104,567 @@ xfs_btree_commit_ifakeroot(
cur->bc_ops = ops;
cur->bc_flags &= ~XFS_BTREE_STAGING;
}
+
+/*
+ * Bulk Loading of Staged Btrees
+ * =============================
+ *
+ * This interface is used with a staged btree cursor to create a totally new
+ * btree with a large number of records (i.e. more than what would fit in a
+ * single block). When the creation is complete, the new root can be linked
+ * atomically into the filesystem by committing the staged cursor.
+ *
+ * The first step for the caller is to construct a fake btree root structure
+ * and a staged btree cursor. A staging cursor contains all the geometry
+ * information for the btree type but will fail all operations that could have
+ * side effects in the filesystem (e.g. btree shape changes). Regular
+ * operations will not work unless the staging cursor is committed and becomes
+ * a regular cursor.
+ *
+ * For a btree rooted in an AG header, use an xbtree_afakeroot structure.
+ * This should be initialized to zero. For a btree rooted in an inode fork,
+ * use an xbtree_ifakeroot structure. @if_fork_size field should be set to
+ * the number of bytes available to the fork in the inode; @if_fork should
+ * point to a freshly allocated xfs_inode_fork; and @if_format should be set
+ * to the appropriate fork type (e.g. XFS_DINODE_FMT_BTREE).
+ *
+ * The next step for the caller is to initialize a struct xfs_btree_bload
+ * context. The @nr_records field is the number of records that are to be
+ * loaded into the btree. The @leaf_slack and @node_slack fields are the
+ * number of records (or key/ptr) slots to leave empty in new btree blocks.
+ * If a caller sets a slack value to -1, the slack value will be computed to
+ * fill the block halfway between minrecs and maxrecs items per block.
+ *
+ * The number of items placed in each btree block is computed via the following
+ * algorithm: For leaf levels, the number of items for the level is nr_records.
+ * For node levels, the number of items for the level is the number of blocks
+ * in the next lower level of the tree. For each level, the desired number of
+ * items per block is defined as:
+ *
+ * desired = max(minrecs, maxrecs - slack factor)
+ *
+ * The number of blocks for the level is defined to be:
+ *
+ * blocks = nr_items / desired
+ *
+ * Note this is rounded down so that the npb calculation below will never fall
+ * below minrecs. The number of items that will actually be loaded into each
+ * btree block is defined as:
+ *
+ * npb = nr_items / blocks
+ *
+ * Some of the leftmost blocks in the level will contain one extra record as
+ * needed to handle uneven division. If the number of records in any block
+ * would exceed maxrecs for that level, blocks is incremented and npb is
+ * recalculated.
+ *
+ * In other words, we compute the number of blocks needed to satisfy a given
+ * loading level, then spread the items as evenly as possible.
+ *
+ * To complete this step, call xfs_btree_bload_compute_geometry, which uses
+ * those settings to compute the height of the btree and the number of blocks
+ * that will be needed to construct the btree. These values are stored in the
+ * @btree_height and @nr_blocks fields.
+ *
+ * At this point, the caller must allocate @nr_blocks blocks and save them for
+ * later. If space is to be allocated transactionally, the staging cursor
+ * must be deleted before and recreated after, which is why computing the
+ * geometry is a separate step.
+ *
+ * The fourth step in the bulk loading process is to set the function pointers
+ * in the bload context structure. @get_data will be called for each record
+ * that will be loaded into the btree; it should set the cursor's bc_rec
+ * field, which will be converted to on-disk format and copied into the
+ * appropriate record slot. @alloc_block should supply one of the blocks
+ * allocated in the previous step. For btrees which are rooted in an inode
+ * fork, @iroot_size is called to compute the size of the incore btree root
+ * block. Call xfs_btree_bload to start constructing the btree.
+ *
+ * The final step is to commit the staging cursor, which logs the new btree
+ * root and turns the btree into a regular btree cursor, and free the fake
+ * roots.
+ */
+
+/*
+ * Put a btree block that we're loading onto the ordered list and release it.
+ * The btree blocks will be written when the final transaction swapping the
+ * btree roots is committed.
+ */
+static void
+xfs_btree_bload_drop_buf(
+ struct xfs_trans *tp,
+ struct xfs_buf **bpp)
+{
+ if (*bpp == NULL)
+ return;
+
+ xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_BTREE_BUF);
+ xfs_trans_ordered_buf(tp, *bpp);
+ xfs_trans_brelse(tp, *bpp);
+ *bpp = NULL;
+}
+
+/* Allocate and initialize one btree block for bulk loading. */
+STATIC int
+xfs_btree_bload_prep_block(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_bload *bbl,
+ unsigned int level,
+ unsigned int nr_this_block,
+ union xfs_btree_ptr *ptrp,
+ struct xfs_buf **bpp,
+ struct xfs_btree_block **blockp,
+ void *priv)
+{
+ union xfs_btree_ptr new_ptr;
+ struct xfs_buf *new_bp;
+ struct xfs_btree_block *new_block;
+ int ret;
+
+ if ((cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) &&
+ level == cur->bc_nlevels - 1) {
+ struct xfs_ifork *ifp = cur->bc_private.b.ifake->if_fork;
+ size_t new_size;
+
+ /* Allocate a new incore btree root block. */
+ new_size = bbl->iroot_size(cur, nr_this_block, priv);
+ ifp->if_broot = kmem_zalloc(new_size, 0);
+ ifp->if_broot_bytes = (int)new_size;
+ ifp->if_flags |= XFS_IFBROOT;
+
+ /* Initialize it and send it out. */
+ xfs_btree_init_block_int(cur->bc_mp, ifp->if_broot,
+ XFS_BUF_DADDR_NULL, cur->bc_btnum, level,
+ nr_this_block, cur->bc_private.b.ip->i_ino,
+ cur->bc_flags);
+
+ *bpp = NULL;
+ *blockp = ifp->if_broot;
+ xfs_btree_set_ptr_null(cur, ptrp);
+ return 0;
+ }
+
+ /* Allocate a new leaf block. */
+ ret = bbl->alloc_block(cur, &new_ptr, priv);
+ if (ret)
+ return ret;
+
+ ASSERT(!xfs_btree_ptr_is_null(cur, &new_ptr));
+
+ ret = xfs_btree_get_buf_block(cur, &new_ptr, &new_block, &new_bp);
+ if (ret)
+ return ret;
+
+ /* Initialize the btree block. */
+ xfs_btree_init_block_cur(cur, new_bp, level, nr_this_block);
+ if (*blockp)
+ xfs_btree_set_sibling(cur, *blockp, &new_ptr, XFS_BB_RIGHTSIB);
+ xfs_btree_set_sibling(cur, new_block, ptrp, XFS_BB_LEFTSIB);
+ xfs_btree_set_numrecs(new_block, nr_this_block);
+
+ /* Release the old block and set the out parameters. */
+ xfs_btree_bload_drop_buf(cur->bc_tp, bpp);
+ *blockp = new_block;
+ *bpp = new_bp;
+ xfs_btree_copy_ptrs(cur, ptrp, &new_ptr, 1);
+ return 0;
+}
+
+/* Load one leaf block. */
+STATIC int
+xfs_btree_bload_leaf(
+ struct xfs_btree_cur *cur,
+ unsigned int recs_this_block,
+ xfs_btree_bload_get_fn get_data,
+ struct xfs_btree_block *block,
+ void *priv)
+{
+ unsigned int j;
+ int ret;
+
+ /* Fill the leaf block with records. */
+ for (j = 1; j <= recs_this_block; j++) {
+ union xfs_btree_rec *block_recs;
+
+ ret = get_data(cur, priv);
+ if (ret)
+ return ret;
+ block_recs = xfs_btree_rec_addr(cur, j, block);
+ cur->bc_ops->init_rec_from_cur(cur, block_recs);
+ }
+
+ return 0;
+}
+
+/* Load one node block. */
+STATIC int
+xfs_btree_bload_node(
+ struct xfs_btree_cur *cur,
+ unsigned int recs_this_block,
+ union xfs_btree_ptr *child_ptr,
+ struct xfs_btree_block *block)
+{
+ unsigned int j;
+ int ret;
+
+ /* Fill the node block with keys and pointers. */
+ for (j = 1; j <= recs_this_block; j++) {
+ union xfs_btree_key child_key;
+ union xfs_btree_ptr *block_ptr;
+ union xfs_btree_key *block_key;
+ struct xfs_btree_block *child_block;
+ struct xfs_buf *child_bp;
+
+ ASSERT(!xfs_btree_ptr_is_null(cur, child_ptr));
+
+ ret = xfs_btree_get_buf_block(cur, child_ptr, &child_block,
+ &child_bp);
+ if (ret)
+ return ret;
+
+ xfs_btree_get_keys(cur, child_block, &child_key);
+
+ block_ptr = xfs_btree_ptr_addr(cur, j, block);
+ xfs_btree_copy_ptrs(cur, block_ptr, child_ptr, 1);
+
+ block_key = xfs_btree_key_addr(cur, j, block);
+ xfs_btree_copy_keys(cur, block_key, &child_key, 1);
+
+ xfs_btree_get_sibling(cur, child_block, child_ptr,
+ XFS_BB_RIGHTSIB);
+ xfs_trans_brelse(cur->bc_tp, child_bp);
+ }
+
+ return 0;
+}
+
+/*
+ * Compute the maximum number of records (or keyptrs) per block that we want to
+ * install at this level in the btree. Caller is responsible for having set
+ * @cur->bc_private.b.forksize to the desired fork size, if appropriate.
+ */
+STATIC unsigned int
+xfs_btree_bload_max_npb(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_bload *bbl,
+ unsigned int level)
+{
+ unsigned int ret;
+
+ if (level == cur->bc_nlevels - 1 && cur->bc_ops->get_dmaxrecs)
+ return cur->bc_ops->get_dmaxrecs(cur, level);
+
+ ret = cur->bc_ops->get_maxrecs(cur, level);
+ if (level == 0)
+ ret -= bbl->leaf_slack;
+ else
+ ret -= bbl->node_slack;
+ return ret;
+}
+
+/*
+ * Compute the desired number of records (or keyptrs) per block that we want to
+ * install at this level in the btree, which must be somewhere between minrecs
+ * and max_npb. The caller is free to install fewer records per block.
+ */
+STATIC unsigned int
+xfs_btree_bload_desired_npb(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_bload *bbl,
+ unsigned int level)
+{
+ unsigned int npb = xfs_btree_bload_max_npb(cur, bbl, level);
+
+ /* Root blocks are not subject to minrecs rules. */
+ if (level == cur->bc_nlevels - 1)
+ return max(1U, npb);
+
+ return max_t(unsigned int, cur->bc_ops->get_minrecs(cur, level), npb);
+}
+
+/*
+ * Compute the number of records to be stored in each block at this level and
+ * the number of blocks for this level. For leaf levels, we must populate an
+ * empty root block even if there are no records, so we have to have at least
+ * one block.
+ */
+STATIC void
+xfs_btree_bload_level_geometry(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_bload *bbl,
+ unsigned int level,
+ uint64_t nr_this_level,
+ unsigned int *avg_per_block,
+ uint64_t *blocks,
+ uint64_t *blocks_with_extra)
+{
+ uint64_t npb;
+ uint64_t dontcare;
+ unsigned int desired_npb;
+ unsigned int maxnr;
+
+ maxnr = cur->bc_ops->get_maxrecs(cur, level);
+
+ /*
+ * Compute the number of blocks we need to fill each block with the
+ * desired number of records/keyptrs per block. Because desired_npb
+ * could be minrecs, we use regular integer division (which rounds
+ * the block count down) so that in the next step the effective # of
+ * items per block will never be less than desired_npb.
+ */
+ desired_npb = xfs_btree_bload_desired_npb(cur, bbl, level);
+ *blocks = div64_u64_rem(nr_this_level, desired_npb, &dontcare);
+ *blocks = max(1ULL, *blocks);
+
+ /*
+ * Compute the number of records that we will actually put in each
+ * block, assuming that we want to spread the records evenly between
+ * the blocks. Take care that the effective # of items per block (npb)
+ * won't exceed maxrecs even for the blocks that get an extra record,
+ * since desired_npb could be maxrecs, and in the previous step we
+ * rounded the block count down.
+ */
+ npb = div64_u64_rem(nr_this_level, *blocks, blocks_with_extra);
+ if (npb > maxnr || (npb == maxnr && *blocks_with_extra > 0)) {
+ (*blocks)++;
+ npb = div64_u64_rem(nr_this_level, *blocks, blocks_with_extra);
+ }
+
+ *avg_per_block = min_t(uint64_t, npb, nr_this_level);
+
+ trace_xfs_btree_bload_level_geometry(cur, level, nr_this_level,
+ *avg_per_block, desired_npb, *blocks,
+ *blocks_with_extra);
+}
+
+/*
+ * Ensure a slack value is appropriate for the btree.
+ *
+ * If the slack value is negative, set slack so that we fill the block to
+ * halfway between minrecs and maxrecs. Make sure the slack is never so large
+ * that we can underflow minrecs.
+ */
+static void
+xfs_btree_bload_ensure_slack(
+ struct xfs_btree_cur *cur,
+ int *slack,
+ int level)
+{
+ int maxr;
+ int minr;
+
+ /*
+ * We only care about slack for btree blocks, so set the btree nlevels
+ * to 3 so that level 0 is a leaf block and level 1 is a node block.
+ * Avoid straying into inode roots, since we don't do slack there.
+ */
+ cur->bc_nlevels = 3;
+ maxr = cur->bc_ops->get_maxrecs(cur, level);
+ minr = cur->bc_ops->get_minrecs(cur, level);
+
+ /*
+ * If slack is negative, automatically set slack so that we load the
+ * btree block approximately halfway between minrecs and maxrecs.
+ * Generally, this will net us 75% loading.
+ */
+ if (*slack < 0)
+ *slack = maxr - ((maxr + minr) >> 1);
+
+ *slack = min(*slack, maxr - minr);
+}
+
+/*
+ * Prepare a btree cursor for a bulk load operation by computing the geometry
+ * fields in @bbl. Caller must ensure that the btree cursor is a staging
+ * cursor. This function can be called multiple times.
+ */
+int
+xfs_btree_bload_compute_geometry(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_bload *bbl,
+ uint64_t nr_records)
+{
+ uint64_t nr_blocks = 0;
+ uint64_t nr_this_level;
+
+ ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
+
+ xfs_btree_bload_ensure_slack(cur, &bbl->leaf_slack, 0);
+ xfs_btree_bload_ensure_slack(cur, &bbl->node_slack, 1);
+
+ bbl->nr_records = nr_this_level = nr_records;
+ for (cur->bc_nlevels = 1; cur->bc_nlevels < XFS_BTREE_MAXLEVELS;) {
+ uint64_t level_blocks;
+ uint64_t dontcare64;
+ unsigned int level = cur->bc_nlevels - 1;
+ unsigned int avg_per_block;
+
+ /*
+ * If all the things we want to store at this level would fit
+ * in a single root block, then we have our btree root and are
+ * done. Note that bmap btrees do not allow records in the
+ * root.
+ */
+ if (!(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) || level != 0) {
+ xfs_btree_bload_level_geometry(cur, bbl, level,
+ nr_this_level, &avg_per_block,
+ &level_blocks, &dontcare64);
+ if (nr_this_level <= avg_per_block) {
+ nr_blocks++;
+ break;
+ }
+ }
+
+ /*
+ * Otherwise, we have to store all the records for this level
+ * in blocks and therefore need another level of btree to point
+ * to those blocks. Increase the number of levels and
+ * recompute the number of records we can store at this level
+ * because that can change depending on whether or not a level
+ * is the root level.
+ */
+ cur->bc_nlevels++;
+ xfs_btree_bload_level_geometry(cur, bbl, level, nr_this_level,
+ &avg_per_block, &level_blocks, &dontcare64);
+ nr_blocks += level_blocks;
+ nr_this_level = level_blocks;
+ }
+
+ if (cur->bc_nlevels == XFS_BTREE_MAXLEVELS)
+ return -EOVERFLOW;
+
+ bbl->btree_height = cur->bc_nlevels;
+ if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE)
+ bbl->nr_blocks = nr_blocks - 1;
+ else
+ bbl->nr_blocks = nr_blocks;
+ return 0;
+}
+
+/*
+ * Bulk load a btree.
+ *
+ * Load @bbl->nr_records quantity of records into a btree using the supplied
+ * empty and staging btree cursor @cur and a @bbl that has been filled out by
+ * the xfs_btree_bload_compute_geometry function.
+ *
+ * The @bbl->get_data function must populate the cursor's bc_rec every time it
+ * is called. The @bbl->alloc_block function will be used to allocate new
+ * btree blocks. @priv is passed to both functions.
+ *
+ * Caller must ensure that @cur is a staging cursor. Any existing btree rooted
+ * in the fakeroot will be lost, so do not call this function twice.
+ */
+int
+xfs_btree_bload(
+ struct xfs_btree_cur *cur,
+ struct xfs_btree_bload *bbl,
+ void *priv)
+{
+ union xfs_btree_ptr child_ptr;
+ union xfs_btree_ptr ptr;
+ struct xfs_buf *bp = NULL;
+ struct xfs_btree_block *block = NULL;
+ uint64_t nr_this_level = bbl->nr_records;
+ uint64_t blocks;
+ uint64_t i;
+ uint64_t blocks_with_extra;
+ uint64_t total_blocks = 0;
+ unsigned int avg_per_block;
+ unsigned int level = 0;
+ int ret;
+
+ ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
+
+ cur->bc_nlevels = bbl->btree_height;
+ xfs_btree_set_ptr_null(cur, &child_ptr);
+ xfs_btree_set_ptr_null(cur, &ptr);
+
+ xfs_btree_bload_level_geometry(cur, bbl, level, nr_this_level,
+ &avg_per_block, &blocks, &blocks_with_extra);
+
+ /* Load each leaf block. */
+ for (i = 0; i < blocks; i++) {
+ unsigned int nr_this_block = avg_per_block;
+
+ if (i < blocks_with_extra)
+ nr_this_block++;
+
+ ret = xfs_btree_bload_prep_block(cur, bbl, level,
+ nr_this_block, &ptr, &bp, &block, priv);
+ if (ret)
+ return ret;
+
+ trace_xfs_btree_bload_block(cur, level, i, blocks, &ptr,
+ nr_this_block);
+
+ ret = xfs_btree_bload_leaf(cur, nr_this_block, bbl->get_data,
+ block, priv);
+ if (ret)
+ goto out;
+
+ /* Record the leftmost pointer to start the next level. */
+ if (i == 0)
+ xfs_btree_copy_ptrs(cur, &child_ptr, &ptr, 1);
+ }
+ total_blocks += blocks;
+ xfs_btree_bload_drop_buf(cur->bc_tp, &bp);
+
+ /* Populate the internal btree nodes. */
+ for (level = 1; level < cur->bc_nlevels; level++) {
+ union xfs_btree_ptr first_ptr;
+
+ nr_this_level = blocks;
+ block = NULL;
+ xfs_btree_set_ptr_null(cur, &ptr);
+
+ xfs_btree_bload_level_geometry(cur, bbl, level, nr_this_level,
+ &avg_per_block, &blocks, &blocks_with_extra);
+
+ /* Load each node block. */
+ for (i = 0; i < blocks; i++) {
+ unsigned int nr_this_block = avg_per_block;
+
+ if (i < blocks_with_extra)
+ nr_this_block++;
+
+ ret = xfs_btree_bload_prep_block(cur, bbl, level,
+ nr_this_block, &ptr, &bp, &block,
+ priv);
+ if (ret)
+ return ret;
+
+ trace_xfs_btree_bload_block(cur, level, i, blocks,
+ &ptr, nr_this_block);
+
+ ret = xfs_btree_bload_node(cur, nr_this_block,
+ &child_ptr, block);
+ if (ret)
+ goto out;
+
+ /*
+ * Record the leftmost pointer to start the next level.
+ */
+ if (i == 0)
+ xfs_btree_copy_ptrs(cur, &first_ptr, &ptr, 1);
+ }
+ total_blocks += blocks;
+ xfs_btree_bload_drop_buf(cur->bc_tp, &bp);
+ xfs_btree_copy_ptrs(cur, &child_ptr, &first_ptr, 1);
+ }
+
+ /* Initialize the new root. */
+ if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) {
+ ASSERT(xfs_btree_ptr_is_null(cur, &ptr));
+ cur->bc_private.b.ifake->if_levels = cur->bc_nlevels;
+ cur->bc_private.b.ifake->if_blocks = total_blocks - 1;
+ } else {
+ cur->bc_private.a.afake->af_root = be32_to_cpu(ptr.s);
+ cur->bc_private.a.afake->af_levels = cur->bc_nlevels;
+ cur->bc_private.a.afake->af_blocks = total_blocks;
+ }
+out:
+ if (bp)
+ xfs_trans_brelse(cur->bc_tp, bp);
+ return ret;
+}
diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
index a17becb72ab8..5c6992a04ea2 100644
--- a/fs/xfs/libxfs/xfs_btree.h
+++ b/fs/xfs/libxfs/xfs_btree.h
@@ -582,4 +582,47 @@ void xfs_btree_stage_ifakeroot(struct xfs_btree_cur *cur,
void xfs_btree_commit_ifakeroot(struct xfs_btree_cur *cur, int whichfork,
const struct xfs_btree_ops *ops);
+typedef int (*xfs_btree_bload_get_fn)(struct xfs_btree_cur *cur, void *priv);
+typedef int (*xfs_btree_bload_alloc_block_fn)(struct xfs_btree_cur *cur,
+ union xfs_btree_ptr *ptr, void *priv);
+typedef size_t (*xfs_btree_bload_iroot_size_fn)(struct xfs_btree_cur *cur,
+ unsigned int nr_this_level, void *priv);
+
+/* Bulk loading of staged btrees. */
+struct xfs_btree_bload {
+ /* Function to store a record in the cursor. */
+ xfs_btree_bload_get_fn get_data;
+
+ /* Function to allocate a block for the btree. */
+ xfs_btree_bload_alloc_block_fn alloc_block;
+
+ /* Function to compute the size of the in-core btree root block. */
+ xfs_btree_bload_iroot_size_fn iroot_size;
+
+ /* Number of records the caller wants to store. */
+ uint64_t nr_records;
+
+ /* Number of btree blocks needed to store those records. */
+ uint64_t nr_blocks;
+
+ /*
+ * Number of free records to leave in each leaf block. If this (or
+ * any of the slack values) are negative, this will be computed to
+ * be halfway between maxrecs and minrecs. This typically leaves the
+ * block 75% full.
+ */
+ int leaf_slack;
+
+ /* Number of free keyptrs to leave in each node block. */
+ int node_slack;
+
+ /* Computed btree height. */
+ unsigned int btree_height;
+};
+
+int xfs_btree_bload_compute_geometry(struct xfs_btree_cur *cur,
+ struct xfs_btree_bload *bbl, uint64_t nr_records);
+int xfs_btree_bload(struct xfs_btree_cur *cur, struct xfs_btree_bload *bbl,
+ void *priv);
+
#endif /* __XFS_BTREE_H__ */
diff --git a/fs/xfs/xfs_trace.c b/fs/xfs/xfs_trace.c
index bc85b89f88ca..9b5e58a92381 100644
--- a/fs/xfs/xfs_trace.c
+++ b/fs/xfs/xfs_trace.c
@@ -6,6 +6,7 @@
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
+#include "xfs_bit.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index a78055521fcd..6d7ba64b7a0f 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -35,6 +35,7 @@ struct xfs_icreate_log;
struct xfs_owner_info;
struct xfs_trans_res;
struct xfs_inobt_rec_incore;
+union xfs_btree_ptr;
DECLARE_EVENT_CLASS(xfs_attr_list_class,
TP_PROTO(struct xfs_attr_list_context *ctx),
@@ -3670,6 +3671,90 @@ TRACE_EVENT(xfs_btree_commit_ifakeroot,
__entry->blocks)
)
+TRACE_EVENT(xfs_btree_bload_level_geometry,
+ TP_PROTO(struct xfs_btree_cur *cur, unsigned int level,
+ uint64_t nr_this_level, unsigned int nr_per_block,
+ unsigned int desired_npb, uint64_t blocks,
+ uint64_t blocks_with_extra),
+ TP_ARGS(cur, level, nr_this_level, nr_per_block, desired_npb, blocks,
+ blocks_with_extra),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(xfs_btnum_t, btnum)
+ __field(unsigned int, level)
+ __field(unsigned int, nlevels)
+ __field(uint64_t, nr_this_level)
+ __field(unsigned int, nr_per_block)
+ __field(unsigned int, desired_npb)
+ __field(unsigned long long, blocks)
+ __field(unsigned long long, blocks_with_extra)
+ ),
+ TP_fast_assign(
+ __entry->dev = cur->bc_mp->m_super->s_dev;
+ __entry->btnum = cur->bc_btnum;
+ __entry->level = level;
+ __entry->nlevels = cur->bc_nlevels;
+ __entry->nr_this_level = nr_this_level;
+ __entry->nr_per_block = nr_per_block;
+ __entry->desired_npb = desired_npb;
+ __entry->blocks = blocks;
+ __entry->blocks_with_extra = blocks_with_extra;
+ ),
+ TP_printk("dev %d:%d btree %s level %u/%u nr_this_level %llu nr_per_block %u desired_npb %u blocks %llu blocks_with_extra %llu",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __print_symbolic(__entry->btnum, XFS_BTNUM_STRINGS),
+ __entry->level,
+ __entry->nlevels,
+ __entry->nr_this_level,
+ __entry->nr_per_block,
+ __entry->desired_npb,
+ __entry->blocks,
+ __entry->blocks_with_extra)
+)
+
+TRACE_EVENT(xfs_btree_bload_block,
+ TP_PROTO(struct xfs_btree_cur *cur, unsigned int level,
+ uint64_t block_idx, uint64_t nr_blocks,
+ union xfs_btree_ptr *ptr, unsigned int nr_records),
+ TP_ARGS(cur, level, block_idx, nr_blocks, ptr, nr_records),
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(xfs_btnum_t, btnum)
+ __field(unsigned int, level)
+ __field(unsigned long long, block_idx)
+ __field(unsigned long long, nr_blocks)
+ __field(xfs_agnumber_t, agno)
+ __field(xfs_agblock_t, agbno)
+ __field(unsigned int, nr_records)
+ ),
+ TP_fast_assign(
+ __entry->dev = cur->bc_mp->m_super->s_dev;
+ __entry->btnum = cur->bc_btnum;
+ __entry->level = level;
+ __entry->block_idx = block_idx;
+ __entry->nr_blocks = nr_blocks;
+ if (cur->bc_flags & XFS_BTREE_LONG_PTRS) {
+ xfs_fsblock_t fsb = be64_to_cpu(ptr->l);
+
+ __entry->agno = XFS_FSB_TO_AGNO(cur->bc_mp, fsb);
+ __entry->agbno = XFS_FSB_TO_AGBNO(cur->bc_mp, fsb);
+ } else {
+ __entry->agno = cur->bc_private.a.agno;
+ __entry->agbno = be32_to_cpu(ptr->s);
+ }
+ __entry->nr_records = nr_records;
+ ),
+ TP_printk("dev %d:%d btree %s level %u block %llu/%llu fsb (%u/%u) recs %u",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __print_symbolic(__entry->btnum, XFS_BTNUM_STRINGS),
+ __entry->level,
+ __entry->block_idx,
+ __entry->nr_blocks,
+ __entry->agno,
+ __entry->agbno,
+ __entry->nr_records)
+)
+
#endif /* _TRACE_XFS_H */
#undef TRACE_INCLUDE_PATH
