From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Make it so that we can actually store btree records in the inode
core (i.e. enable bb_level == 0) so that the rtrmapbt can do this.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_btree.c | 196 ++++++++++++++++++++++++++++++++++-----------
fs/xfs/libxfs/xfs_btree.h | 1
2 files changed, 148 insertions(+), 49 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index caf49f233e56..bec359cdf544 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -192,6 +192,11 @@ xfs_btree_check_block(
int level, /* level of the btree block */
struct xfs_buf *bp) /* buffer containing block, if any */
{
+ /* Don't check the inode-core root. */
+ if ((cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) &&
+ level == cur->bc_nlevels - 1)
+ return 0;
+
if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
return xfs_btree_check_lblock(cur, block, level, bp);
else
@@ -1478,10 +1483,15 @@ xfs_btree_log_recs(
int last)
{
- xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLFT_BTREE_BUF);
- xfs_trans_log_buf(cur->bc_tp, bp,
- xfs_btree_rec_offset(cur, first),
- xfs_btree_rec_offset(cur, last + 1) - 1);
+ if (bp) {
+ xfs_trans_buf_set_type(cur->bc_tp, bp, XFS_BLFT_BTREE_BUF);
+ xfs_trans_log_buf(cur->bc_tp, bp,
+ xfs_btree_rec_offset(cur, first),
+ xfs_btree_rec_offset(cur, last + 1) - 1);
+ } else {
+ xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip,
+ xfs_ilog_fbroot(cur->bc_private.b.whichfork));
+ }
}
@@ -2935,8 +2945,11 @@ xfs_btree_new_iroot(
struct xfs_btree_block *cblock; /* child btree block */
union xfs_btree_key *ckp; /* child key pointer */
union xfs_btree_ptr *cpp; /* child ptr pointer */
+ union xfs_btree_rec *crp;
union xfs_btree_key *kp; /* pointer to btree key */
union xfs_btree_ptr *pp; /* pointer to block addr */
+ union xfs_btree_rec *rp;
+ union xfs_btree_ptr aptr;
union xfs_btree_ptr nptr; /* new block addr */
int level; /* btree level */
int error; /* error return code */
@@ -2949,10 +2962,15 @@ xfs_btree_new_iroot(
level = cur->bc_nlevels - 1;
block = xfs_btree_get_iroot(cur);
- pp = xfs_btree_ptr_addr(cur, 1, block);
+ ASSERT(level > 0 || (cur->bc_flags & XFS_BTREE_IROOT_RECORDS));
+ if (level > 0)
+ aptr = *xfs_btree_ptr_addr(cur, 1, block);
+ else
+ aptr.l = cpu_to_be64(XFS_INO_TO_FSB(cur->bc_mp,
+ cur->bc_private.b.ip->i_ino));
/* Allocate the new block. If we can't do it, we're toast. Give up. */
- error = cur->bc_ops->alloc_block(cur, pp, &nptr, stat);
+ error = cur->bc_ops->alloc_block(cur, &aptr, &nptr, stat);
if (error)
goto error0;
if (*stat == 0)
@@ -2977,41 +2995,92 @@ xfs_btree_new_iroot(
cblock->bb_u.s.bb_blkno = cpu_to_be64(cbp->b_bn);
}
- be16_add_cpu(&block->bb_level, 1);
xfs_btree_set_numrecs(block, 1);
cur->bc_nlevels++;
cur->bc_ptrs[level + 1] = 1;
- kp = xfs_btree_key_addr(cur, 1, block);
- ckp = xfs_btree_key_addr(cur, 1, cblock);
- xfs_btree_copy_keys(cur, ckp, kp, xfs_btree_get_numrecs(cblock));
+ if (level > 0) {
+ /*
+ * We already incremented nlevels, so we have to do the
+ * same to bb_level or else pp will be calculated with the
+ * maxrecs for regular blocks and point at the wrong place.
+ */
+ be16_add_cpu(&block->bb_level, 1);
+
+ kp = xfs_btree_key_addr(cur, 1, block);
+ ckp = xfs_btree_key_addr(cur, 1, cblock);
+ xfs_btree_copy_keys(cur, ckp, kp,
+ xfs_btree_get_numrecs(cblock));
+
+ pp = xfs_btree_ptr_addr(cur, 1, block);
+ cpp = xfs_btree_ptr_addr(cur, 1, cblock);
- cpp = xfs_btree_ptr_addr(cur, 1, cblock);
- for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
- error = xfs_btree_debug_check_ptr(cur, pp, i, level);
+ for (i = 0; i < be16_to_cpu(cblock->bb_numrecs); i++) {
+ error = xfs_btree_debug_check_ptr(cur, pp, i, level);
+ if (error)
+ goto error0;
+ }
+
+ xfs_btree_copy_ptrs(cur, cpp, pp,
+ xfs_btree_get_numrecs(cblock));
+
+ error = xfs_btree_debug_check_ptr(cur, &nptr, 0, level);
if (error)
goto error0;
- }
- xfs_btree_copy_ptrs(cur, cpp, pp, xfs_btree_get_numrecs(cblock));
+ xfs_btree_copy_ptrs(cur, pp, &nptr, 1);
- error = xfs_btree_debug_check_ptr(cur, &nptr, 0, level);
- if (error)
- goto error0;
+ cur->bc_ops->iroot_realloc(cur,
+ 1 - xfs_btree_get_numrecs(cblock));
+ block = xfs_btree_get_iroot(cur);
+
+ xfs_btree_setbuf(cur, level, cbp);
+
+ /*
+ * Do all this logging at the end so that
+ * the root is at the right level.
+ */
+ xfs_btree_log_block(cur, cbp, XFS_BB_ALL_BITS);
+ xfs_btree_log_keys(cur, cbp, 1,
+ be16_to_cpu(cblock->bb_numrecs));
+ xfs_btree_log_ptrs(cur, cbp, 1,
+ be16_to_cpu(cblock->bb_numrecs));
+ } else {
+ rp = xfs_btree_rec_addr(cur, 1, block);
+ crp = xfs_btree_rec_addr(cur, 1, cblock);
+ xfs_btree_copy_recs(cur, crp, rp,
+ xfs_btree_get_numrecs(cblock));
- xfs_btree_copy_ptrs(cur, pp, &nptr, 1);
+ /*
+ * Trickery here: The amount of memory we need for the root
+ * changes when we convert a leaf to a node. Therefore,
+ * set the length to zero, increment the level, and set
+ * the length to 1 record.
+ */
+ cur->bc_ops->iroot_realloc(cur, -xfs_btree_get_numrecs(cblock));
+ block = xfs_btree_get_iroot(cur);
+ be16_add_cpu(&block->bb_level, 1);
+ cur->bc_ops->iroot_realloc(cur, 1);
+ block = xfs_btree_get_iroot(cur);
- cur->bc_ops->iroot_realloc(cur, 1 - xfs_btree_get_numrecs(cblock));
+ /* Copy pointer into the block. */
+ xfs_btree_copy_ptrs(cur, xfs_btree_ptr_addr(cur, 1, block),
+ &nptr, 1);
- xfs_btree_setbuf(cur, level, cbp);
+ xfs_btree_setbuf(cur, level, cbp);
- /*
- * Do all this logging at the end so that
- * the root is at the right level.
- */
- xfs_btree_log_block(cur, cbp, XFS_BB_ALL_BITS);
- xfs_btree_log_keys(cur, cbp, 1, be16_to_cpu(cblock->bb_numrecs));
- xfs_btree_log_ptrs(cur, cbp, 1, be16_to_cpu(cblock->bb_numrecs));
+ /*
+ * Do all this logging at the end so that
+ * the root is at the right level.
+ */
+ xfs_btree_log_block(cur, cbp, XFS_BB_ALL_BITS);
+ xfs_btree_log_recs(cur, cbp, 1,
+ be16_to_cpu(cblock->bb_numrecs));
+
+ /* Write the new keys into the root block. */
+ }
+ /* Get the keys for the new block and put them into the root. */
+ xfs_btree_get_keys(cur, cblock, xfs_btree_key_addr(cur, 1, block));
*logflags |=
XFS_ILOG_CORE | xfs_ilog_fbroot(cur->bc_private.b.whichfork);
@@ -3513,15 +3582,15 @@ STATIC int
xfs_btree_kill_iroot(
struct xfs_btree_cur *cur)
{
- int whichfork = cur->bc_private.b.whichfork;
struct xfs_inode *ip = cur->bc_private.b.ip;
- struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
struct xfs_btree_block *block;
struct xfs_btree_block *cblock;
union xfs_btree_key *kp;
union xfs_btree_key *ckp;
union xfs_btree_ptr *pp;
union xfs_btree_ptr *cpp;
+ union xfs_btree_rec *rp;
+ union xfs_btree_rec *crp;
struct xfs_buf *cbp;
int level;
int index;
@@ -3533,14 +3602,19 @@ xfs_btree_kill_iroot(
int i;
ASSERT(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE);
- ASSERT(cur->bc_nlevels > 1);
+ ASSERT((cur->bc_flags & XFS_BTREE_IROOT_RECORDS) ||
+ cur->bc_nlevels > 1);
/*
* Don't deal with the root block needs to be a leaf case.
* We're just going to turn the thing back into extents anyway.
*/
level = cur->bc_nlevels - 1;
- if (level == 1)
+ if (level == 1 && !(cur->bc_flags & XFS_BTREE_IROOT_RECORDS))
+ goto out0;
+
+ /* If we're already a leaf, jump out. */
+ if (level == 0)
goto out0;
/*
@@ -3571,35 +3645,59 @@ xfs_btree_kill_iroot(
#endif
index = numrecs - cur->bc_ops->get_maxrecs(cur, level);
- if (index) {
- cur->bc_ops->iroot_realloc(cur, index);
- block = ifp->if_broot;
- }
-
be16_add_cpu(&block->bb_numrecs, index);
ASSERT(block->bb_numrecs == cblock->bb_numrecs);
- kp = xfs_btree_key_addr(cur, 1, block);
- ckp = xfs_btree_key_addr(cur, 1, cblock);
- xfs_btree_copy_keys(cur, kp, ckp, numrecs);
+ if (be16_to_cpu(cblock->bb_level) > 0) {
+ if (index) {
+ cur->bc_ops->iroot_realloc(cur, index);
+ block = xfs_btree_get_iroot(cur);
+ }
- pp = xfs_btree_ptr_addr(cur, 1, block);
- cpp = xfs_btree_ptr_addr(cur, 1, cblock);
+ kp = xfs_btree_key_addr(cur, 1, block);
+ ckp = xfs_btree_key_addr(cur, 1, cblock);
+ xfs_btree_copy_keys(cur, kp, ckp, numrecs);
- for (i = 0; i < numrecs; i++) {
- error = xfs_btree_debug_check_ptr(cur, cpp, i, level - 1);
- if (error)
- return error;
- }
+ pp = xfs_btree_ptr_addr(cur, 1, block);
+ cpp = xfs_btree_ptr_addr(cur, 1, cblock);
- xfs_btree_copy_ptrs(cur, pp, cpp, numrecs);
+ for (i = 0; i < numrecs; i++) {
+ error = xfs_btree_debug_check_ptr(cur, cpp, i, level - 1);
+ if (error)
+ return error;
+ }
+
+ xfs_btree_copy_ptrs(cur, pp, cpp, numrecs);
+ /*
+ * Decrement the (root) block's level after copying the
+ * pointers or else pp will be calculated using maxrecs
+ * for a regular block and won't point to the right place.
+ * Notice how we don't adjust nlevels until later.
+ */
+ be16_add_cpu(&block->bb_level, -1);
+ } else {
+ /*
+ * Trickery here: The amount of memory we need for the root
+ * changes when we convert a leaf to a node. Therefore,
+ * set the length to zero, change the level, and set
+ * the length to however many records we're getting.
+ */
+ cur->bc_ops->iroot_realloc(cur, -xfs_btree_get_numrecs(block));
+ block = xfs_btree_get_iroot(cur);
+ be16_add_cpu(&block->bb_level, -1);
+ cur->bc_ops->iroot_realloc(cur, numrecs);
+ block = xfs_btree_get_iroot(cur);
+
+ rp = xfs_btree_rec_addr(cur, 1, block);
+ crp = xfs_btree_rec_addr(cur, 1, cblock);
+ xfs_btree_copy_recs(cur, rp, crp, numrecs);
+ }
error = xfs_btree_free_block(cur, cbp);
if (error)
return error;
cur->bc_bufs[level - 1] = NULL;
- be16_add_cpu(&block->bb_level, -1);
xfs_trans_log_inode(cur->bc_tp, ip,
XFS_ILOG_CORE | xfs_ilog_fbroot(cur->bc_private.b.whichfork));
cur->bc_nlevels--;
diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
index 59f3e42397fb..d20e15d14ab2 100644
--- a/fs/xfs/libxfs/xfs_btree.h
+++ b/fs/xfs/libxfs/xfs_btree.h
@@ -236,6 +236,7 @@ typedef struct xfs_btree_cur
#define XFS_BTREE_LASTREC_UPDATE (1<<2) /* track last rec externally */
#define XFS_BTREE_CRC_BLOCKS (1<<3) /* uses extended btree blocks */
#define XFS_BTREE_OVERLAPPING (1<<4) /* overlapping intervals */
+#define XFS_BTREE_IROOT_RECORDS (1<<5) /* iroot can store records */
#define XFS_BTREE_NOERROR 0
