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path: root/fs/xfs/xfs_ialloc_btree.c
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Diffstat (limited to 'fs/xfs/xfs_ialloc_btree.c')
-rw-r--r--fs/xfs/xfs_ialloc_btree.c2193
1 files changed, 249 insertions, 1944 deletions
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c
index 83502f3edef0..99f2408e8d8e 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/xfs_ialloc_btree.c
@@ -35,2044 +35,349 @@
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_btree.h"
+#include "xfs_btree_trace.h"
#include "xfs_ialloc.h"
#include "xfs_alloc.h"
#include "xfs_error.h"
-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_lshift(xfs_btree_cur_t *, int, int *);
-STATIC int xfs_inobt_newroot(xfs_btree_cur_t *, int *);
-STATIC int xfs_inobt_rshift(xfs_btree_cur_t *, int, int *);
-STATIC int xfs_inobt_split(xfs_btree_cur_t *, int, xfs_agblock_t *,
- xfs_inobt_key_t *, xfs_btree_cur_t **, int *);
-STATIC int xfs_inobt_updkey(xfs_btree_cur_t *, xfs_inobt_key_t *, int);
-/*
- * Single level of the xfs_inobt_delete record deletion routine.
- * Delete record pointed to by cur/level.
- * Remove the record from its block then rebalance the tree.
- * Return 0 for error, 1 for done, 2 to go on to the next level.
- */
-STATIC int /* error */
-xfs_inobt_delrec(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level removing record from */
- int *stat) /* fail/done/go-on */
+STATIC int
+xfs_inobt_get_minrecs(
+ struct xfs_btree_cur *cur,
+ int level)
{
- xfs_buf_t *agbp; /* buffer for a.g. inode header */
- xfs_mount_t *mp; /* mount structure */
- xfs_agi_t *agi; /* allocation group inode header */
- xfs_inobt_block_t *block; /* btree block record/key lives in */
- xfs_agblock_t bno; /* btree block number */
- xfs_buf_t *bp; /* buffer for block */
- int error; /* error return value */
- int i; /* loop index */
- xfs_inobt_key_t key; /* kp points here if block is level 0 */
- xfs_inobt_key_t *kp = NULL; /* pointer to btree keys */
- xfs_agblock_t lbno; /* left block's block number */
- xfs_buf_t *lbp; /* left block's buffer pointer */
- xfs_inobt_block_t *left; /* left btree block */
- xfs_inobt_key_t *lkp; /* left block key pointer */
- xfs_inobt_ptr_t *lpp; /* left block address pointer */
- int lrecs = 0; /* number of records in left block */
- xfs_inobt_rec_t *lrp; /* left block record pointer */
- xfs_inobt_ptr_t *pp = NULL; /* pointer to btree addresses */
- int ptr; /* index in btree block for this rec */
- xfs_agblock_t rbno; /* right block's block number */
- xfs_buf_t *rbp; /* right block's buffer pointer */
- xfs_inobt_block_t *right; /* right btree block */
- xfs_inobt_key_t *rkp; /* right block key pointer */
- xfs_inobt_rec_t *rp; /* pointer to btree records */
- xfs_inobt_ptr_t *rpp; /* right block address pointer */
- int rrecs = 0; /* number of records in right block */
- int numrecs;
- xfs_inobt_rec_t *rrp; /* right block record pointer */
- xfs_btree_cur_t *tcur; /* temporary btree cursor */
-
- mp = cur->bc_mp;
-
- /*
- * Get the index of the entry being deleted, check for nothing there.
- */
- ptr = cur->bc_ptrs[level];
- if (ptr == 0) {
- *stat = 0;
- return 0;
- }
-
- /*
- * Get the buffer & block containing the record or key/ptr.
- */
- bp = cur->bc_bufs[level];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level, bp)))
- return error;
-#endif
- /*
- * Fail if we're off the end of the block.
- */
+ return cur->bc_mp->m_inobt_mnr[level != 0];
+}
- numrecs = be16_to_cpu(block->bb_numrecs);
- if (ptr > numrecs) {
- *stat = 0;
- return 0;
- }
- /*
- * It's a nonleaf. Excise the key and ptr being deleted, by
- * sliding the entries past them down one.
- * Log the changed areas of the block.
- */
- if (level > 0) {
- kp = XFS_INOBT_KEY_ADDR(block, 1, cur);
- pp = XFS_INOBT_PTR_ADDR(block, 1, cur);
-#ifdef DEBUG
- for (i = ptr; i < numrecs; i++) {
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(pp[i]), level)))
- return error;
- }
-#endif
- if (ptr < numrecs) {
- memmove(&kp[ptr - 1], &kp[ptr],
- (numrecs - ptr) * sizeof(*kp));
- memmove(&pp[ptr - 1], &pp[ptr],
- (numrecs - ptr) * sizeof(*kp));
- xfs_inobt_log_keys(cur, bp, ptr, numrecs - 1);
- xfs_inobt_log_ptrs(cur, bp, ptr, numrecs - 1);
- }
- }
- /*
- * It's a leaf. Excise the record being deleted, by sliding the
- * entries past it down one. Log the changed areas of the block.
- */
- else {
- rp = XFS_INOBT_REC_ADDR(block, 1, cur);
- if (ptr < numrecs) {
- memmove(&rp[ptr - 1], &rp[ptr],
- (numrecs - ptr) * sizeof(*rp));
- xfs_inobt_log_recs(cur, bp, ptr, numrecs - 1);
- }
- /*
- * If it's the first record in the block, we'll need a key
- * structure to pass up to the next level (updkey).
- */
- if (ptr == 1) {
- key.ir_startino = rp->ir_startino;
- kp = &key;
- }
- }
- /*
- * Decrement and log the number of entries in the block.
- */
- numrecs--;
- block->bb_numrecs = cpu_to_be16(numrecs);
- xfs_inobt_log_block(cur->bc_tp, bp, XFS_BB_NUMRECS);
- /*
- * Is this the root level? If so, we're almost done.
- */
- if (level == cur->bc_nlevels - 1) {
- /*
- * If this is the root level,
- * and there's only one entry left,
- * and it's NOT the leaf level,
- * then we can get rid of this level.
- */
- if (numrecs == 1 && level > 0) {
- agbp = cur->bc_private.a.agbp;
- agi = XFS_BUF_TO_AGI(agbp);
- /*
- * pp is still set to the first pointer in the block.
- * Make it the new root of the btree.
- */
- bno = be32_to_cpu(agi->agi_root);
- agi->agi_root = *pp;
- be32_add_cpu(&agi->agi_level, -1);
- /*
- * Free the block.
- */
- if ((error = xfs_free_extent(cur->bc_tp,
- XFS_AGB_TO_FSB(mp, cur->bc_private.a.agno, bno), 1)))
- return error;
- xfs_trans_binval(cur->bc_tp, bp);
- xfs_ialloc_log_agi(cur->bc_tp, agbp,
- XFS_AGI_ROOT | XFS_AGI_LEVEL);
- /*
- * Update the cursor so there's one fewer level.
- */
- cur->bc_bufs[level] = NULL;
- cur->bc_nlevels--;
- } else if (level > 0 &&
- (error = xfs_inobt_decrement(cur, level, &i)))
- return error;
- *stat = 1;
- return 0;
- }
- /*
- * If we deleted the leftmost entry in the block, update the
- * key values above us in the tree.
- */
- if (ptr == 1 && (error = xfs_inobt_updkey(cur, kp, level + 1)))
- return error;
- /*
- * If the number of records remaining in the block is at least
- * the minimum, we're done.
- */
- if (numrecs >= XFS_INOBT_BLOCK_MINRECS(level, cur)) {
- if (level > 0 &&
- (error = xfs_inobt_decrement(cur, level, &i)))
- return error;
- *stat = 1;
- return 0;
- }
- /*
- * Otherwise, we have to move some records around to keep the
- * tree balanced. Look at the left and right sibling blocks to
- * see if we can re-balance by moving only one record.
- */
- rbno = be32_to_cpu(block->bb_rightsib);
- lbno = be32_to_cpu(block->bb_leftsib);
- bno = NULLAGBLOCK;
- ASSERT(rbno != NULLAGBLOCK || lbno != NULLAGBLOCK);
- /*
- * Duplicate the cursor so our btree manipulations here won't
- * disrupt the next level up.
- */
- if ((error = xfs_btree_dup_cursor(cur, &tcur)))
- return error;
- /*
- * If there's a right sibling, see if it's ok to shift an entry
- * out of it.
- */
- if (rbno != NULLAGBLOCK) {
- /*
- * Move the temp cursor to the last entry in the next block.
- * Actually any entry but the first would suffice.
- */
- i = xfs_btree_lastrec(tcur, level);
- XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
- if ((error = xfs_inobt_increment(tcur, level, &i)))
- goto error0;
- XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
- i = xfs_btree_lastrec(tcur, level);
- XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
- /*
- * Grab a pointer to the block.
- */
- rbp = tcur->bc_bufs[level];
- right = XFS_BUF_TO_INOBT_BLOCK(rbp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, right, level, rbp)))
- goto error0;
-#endif
- /*
- * Grab the current block number, for future use.
- */
- bno = be32_to_cpu(right->bb_leftsib);
- /*
- * If right block is full enough so that removing one entry
- * won't make it too empty, and left-shifting an entry out
- * of right to us works, we're done.
- */
- if (be16_to_cpu(right->bb_numrecs) - 1 >=
- XFS_INOBT_BLOCK_MINRECS(level, cur)) {
- if ((error = xfs_inobt_lshift(tcur, level, &i)))
- goto error0;
- if (i) {
- ASSERT(be16_to_cpu(block->bb_numrecs) >=
- XFS_INOBT_BLOCK_MINRECS(level, cur));
- xfs_btree_del_cursor(tcur,
- XFS_BTREE_NOERROR);
- if (level > 0 &&
- (error = xfs_inobt_decrement(cur, level,
- &i)))
- return error;
- *stat = 1;
- return 0;
- }
- }
- /*
- * Otherwise, grab the number of records in right for
- * future reference, and fix up the temp cursor to point
- * to our block again (last record).
- */
- rrecs = be16_to_cpu(right->bb_numrecs);
- if (lbno != NULLAGBLOCK) {
- xfs_btree_firstrec(tcur, level);
- if ((error = xfs_inobt_decrement(tcur, level, &i)))
- goto error0;
- }
- }
- /*
- * If there's a left sibling, see if it's ok to shift an entry
- * out of it.
- */
- if (lbno != NULLAGBLOCK) {
- /*
- * Move the temp cursor to the first entry in the
- * previous block.
- */
- xfs_btree_firstrec(tcur, level);
- if ((error = xfs_inobt_decrement(tcur, level, &i)))
- goto error0;
- xfs_btree_firstrec(tcur, level);
- /*
- * Grab a pointer to the block.
- */
- lbp = tcur->bc_bufs[level];
- left = XFS_BUF_TO_INOBT_BLOCK(lbp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
- goto error0;
-#endif
- /*
- * Grab the current block number, for future use.
- */
- bno = be32_to_cpu(left->bb_rightsib);
- /*
- * If left block is full enough so that removing one entry
- * won't make it too empty, and right-shifting an entry out
- * of left to us works, we're done.
- */
- if (be16_to_cpu(left->bb_numrecs) - 1 >=
- XFS_INOBT_BLOCK_MINRECS(level, cur)) {
- if ((error = xfs_inobt_rshift(tcur, level, &i)))
- goto error0;
- if (i) {
- ASSERT(be16_to_cpu(block->bb_numrecs) >=
- XFS_INOBT_BLOCK_MINRECS(level, cur));
- xfs_btree_del_cursor(tcur,
- XFS_BTREE_NOERROR);
- if (level == 0)
- cur->bc_ptrs[0]++;
- *stat = 1;
- return 0;
- }
- }
- /*
- * Otherwise, grab the number of records in right for
- * future reference.
- */
- lrecs = be16_to_cpu(left->bb_numrecs);
- }
- /*
- * Delete the temp cursor, we're done with it.
- */
- xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
- /*
- * If here, we need to do a join to keep the tree balanced.
- */
- ASSERT(bno != NULLAGBLOCK);
- /*
- * See if we can join with the left neighbor block.
- */
- if (lbno != NULLAGBLOCK &&
- lrecs + numrecs <= XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
- /*
- * Set "right" to be the starting block,
- * "left" to be the left neighbor.
- */
- rbno = bno;
- right = block;
- rrecs = be16_to_cpu(right->bb_numrecs);
- rbp = bp;
- if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
- cur->bc_private.a.agno, lbno, 0, &lbp,
- XFS_INO_BTREE_REF)))
- return error;
- left = XFS_BUF_TO_INOBT_BLOCK(lbp);
- lrecs = be16_to_cpu(left->bb_numrecs);
- if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
- return error;
- }
- /*
- * If that won't work, see if we can join with the right neighbor block.
- */
- else if (rbno != NULLAGBLOCK &&
- rrecs + numrecs <= XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
- /*
- * Set "left" to be the starting block,
- * "right" to be the right neighbor.
- */
- lbno = bno;
- left = block;
- lrecs = be16_to_cpu(left->bb_numrecs);
- lbp = bp;
- if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
- cur->bc_private.a.agno, rbno, 0, &rbp,
- XFS_INO_BTREE_REF)))
- return error;
- right = XFS_BUF_TO_INOBT_BLOCK(rbp);
- rrecs = be16_to_cpu(right->bb_numrecs);
- if ((error = xfs_btree_check_sblock(cur, right, level, rbp)))
- return error;
- }
- /*
- * Otherwise, we can't fix the imbalance.
- * Just return. This is probably a logic error, but it's not fatal.
- */
- else {
- if (level > 0 && (error = xfs_inobt_decrement(cur, level, &i)))
- return error;
- *stat = 1;
- return 0;
- }
- /*
- * We're now going to join "left" and "right" by moving all the stuff
- * in "right" to "left" and deleting "right".
- */
- if (level > 0) {
- /*
- * It's a non-leaf. Move keys and pointers.
- */
- lkp = XFS_INOBT_KEY_ADDR(left, lrecs + 1, cur);
- lpp = XFS_INOBT_PTR_ADDR(left, lrecs + 1, cur);
- rkp = XFS_INOBT_KEY_ADDR(right, 1, cur);
- rpp = XFS_INOBT_PTR_ADDR(right, 1, cur);
-#ifdef DEBUG
- for (i = 0; i < rrecs; i++) {
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(rpp[i]), level)))
- return error;
- }
-#endif
- memcpy(lkp, rkp, rrecs * sizeof(*lkp));
- memcpy(lpp, rpp, rrecs * sizeof(*lpp));
- xfs_inobt_log_keys(cur, lbp, lrecs + 1, lrecs + rrecs);
- xfs_inobt_log_ptrs(cur, lbp, lrecs + 1, lrecs + rrecs);
- } else {
- /*
- * It's a leaf. Move records.
- */
- lrp = XFS_INOBT_REC_ADDR(left, lrecs + 1, cur);
- rrp = XFS_INOBT_REC_ADDR(right, 1, cur);
- memcpy(lrp, rrp, rrecs * sizeof(*lrp));
- xfs_inobt_log_recs(cur, lbp, lrecs + 1, lrecs + rrecs);
- }
- /*
- * If we joined with the left neighbor, set the buffer in the
- * cursor to the left block, and fix up the index.
- */
- if (bp != lbp) {
- xfs_btree_setbuf(cur, level, lbp);
- cur->bc_ptrs[level] += lrecs;
- }
- /*
- * If we joined with the right neighbor and there's a level above
- * us, increment the cursor at that level.
- */
- else if (level + 1 < cur->bc_nlevels &&
- (error = xfs_alloc_increment(cur, level + 1, &i)))
- return error;
- /*
- * Fix up the number of records in the surviving block.
- */
- lrecs += rrecs;
- left->bb_numrecs = cpu_to_be16(lrecs);
- /*
- * Fix up the right block pointer in the surviving block, and log it.
- */
- left->bb_rightsib = right->bb_rightsib;
- xfs_inobt_log_block(cur->bc_tp, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
- /*
- * If there is a right sibling now, make it point to the
- * remaining block.
- */
- if (be32_to_cpu(left->bb_rightsib) != NULLAGBLOCK) {
- xfs_inobt_block_t *rrblock;
- xfs_buf_t *rrbp;
+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);
+}
- if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
- cur->bc_private.a.agno, be32_to_cpu(left->bb_rightsib), 0,
- &rrbp, XFS_INO_BTREE_REF)))
- return error;
- rrblock = XFS_BUF_TO_INOBT_BLOCK(rrbp);
- if ((error = xfs_btree_check_sblock(cur, rrblock, level, rrbp)))
- return error;
- rrblock->bb_leftsib = cpu_to_be32(lbno);
- xfs_inobt_log_block(cur->bc_tp, rrbp, XFS_BB_LEFTSIB);
- }
- /*
- * Free the deleting block.
- */
- if ((error = xfs_free_extent(cur->bc_tp, XFS_AGB_TO_FSB(mp,
- cur->bc_private.a.agno, rbno), 1)))
- return error;
- xfs_trans_binval(cur->bc_tp, rbp);
- /*
- * Readjust the ptr at this level if it's not a leaf, since it's
- * still pointing at the deletion point, which makes the cursor
- * inconsistent. If this makes the ptr 0, the caller fixes it up.
- * We can't use decrement because it would change the next level up.
- */
- if (level > 0)
- cur->bc_ptrs[level]--;
- /*
- * Return value means the next level up has something to do.
- */
- *stat = 2;
- return 0;
+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);
-error0:
- xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
- return error;
+ 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);
}
-/*
- * Insert one record/level. Return information to the caller
- * allowing the next level up to proceed if necessary.
- */
-STATIC int /* error */
-xfs_inobt_insrec(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level to insert record at */
- xfs_agblock_t *bnop, /* i/o: block number inserted */
- xfs_inobt_rec_t *recp, /* i/o: record data inserted */
- xfs_btree_cur_t **curp, /* output: new cursor replacing cur */
- int *stat) /* success/failure */
+STATIC int
+xfs_inobt_alloc_block(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_ptr *start,
+ union xfs_btree_ptr *new,
+ int length,
+ int *stat)
{
- xfs_inobt_block_t *block; /* btree block record/key lives in */
- xfs_buf_t *bp; /* buffer for block */
- int error; /* error return value */
- int i; /* loop index */
- xfs_inobt_key_t key; /* key value being inserted */
- xfs_inobt_key_t *kp=NULL; /* pointer to btree keys */
- xfs_agblock_t nbno; /* block number of allocated block */
- xfs_btree_cur_t *ncur; /* new cursor to be used at next lvl */
- xfs_inobt_key_t nkey; /* new key value, from split */
- xfs_inobt_rec_t nrec; /* new record value, for caller */
- int numrecs;
- int optr; /* old ptr value */
- xfs_inobt_ptr_t *pp; /* pointer to btree addresses */
- int ptr; /* index in btree block for this rec */
- xfs_inobt_rec_t *rp=NULL; /* pointer to btree records */
+ xfs_alloc_arg_t args; /* block allocation args */
+ int error; /* error return value */
+ xfs_agblock_t sbno = be32_to_cpu(start->s);
- /*
- * GCC doesn't understand the (arguably complex) control flow in
- * this function and complains about uninitialized structure fields
- * without this.
- */
- memset(&nrec, 0, sizeof(nrec));
+ XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
- /*
- * If we made it to the root level, allocate a new root block
- * and we're done.
- */
- if (level >= cur->bc_nlevels) {
- error = xfs_inobt_newroot(cur, &i);
- *bnop = NULLAGBLOCK;
- *stat = i;
+ 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;
}
- /*
- * Make a key out of the record data to be inserted, and save it.
- */
- key.ir_startino = recp->ir_startino;
- optr = ptr = cur->bc_ptrs[level];
- /*
- * If we're off the left edge, return failure.
- */
- if (ptr == 0) {
+ if (args.fsbno == NULLFSBLOCK) {
+ XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
*stat = 0;
return 0;
}
- /*
- * Get pointers to the btree buffer and block.
- */
- bp = cur->bc_bufs[level];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- numrecs = be16_to_cpu(block->bb_numrecs);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level, bp)))
- return error;
- /*
- * Check that the new entry is being inserted in the right place.
- */
- if (ptr <= numrecs) {
- if (level == 0) {
- rp = XFS_INOBT_REC_ADDR(block, ptr, cur);
- xfs_btree_check_rec(cur->bc_btnum, recp, rp);
- } else {
- kp = XFS_INOBT_KEY_ADDR(block, ptr, cur);
- xfs_btree_check_key(cur->bc_btnum, &key, kp);
- }
- }
-#endif
- nbno = NULLAGBLOCK;
- ncur = NULL;
- /*
- * If the block is full, we can't insert the new entry until we
- * make the block un-full.
- */
- if (numrecs == XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
- /*
- * First, try shifting an entry to the right neighbor.
- */
- if ((error = xfs_inobt_rshift(cur, level, &i)))
- return error;
- if (i) {
- /* nothing */
- }
- /*
- * Next, try shifting an entry to the left neighbor.
- */
- else {
- if ((error = xfs_inobt_lshift(cur, level, &i)))
- return error;
- if (i) {
- optr = ptr = cur->bc_ptrs[level];
- } else {
- /*
- * Next, try splitting the current block
- * in half. If this works we have to
- * re-set our variables because
- * we could be in a different block now.
- */
- if ((error = xfs_inobt_split(cur, level, &nbno,
- &nkey, &ncur, &i)))
- return error;
- if (i) {
- bp = cur->bc_bufs[level];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur,
- block, level, bp)))
- return error;
-#endif
- ptr = cur->bc_ptrs[level];
- nrec.ir_startino = nkey.ir_startino;
- } else {
- /*
- * Otherwise the insert fails.
- */
- *stat = 0;
- return 0;
- }
- }
- }
- }
- /*
- * At this point we know there's room for our new entry in the block
- * we're pointing at.
- */
- numrecs = be16_to_cpu(block->bb_numrecs);
- if (level > 0) {
- /*
- * It's a non-leaf entry. Make a hole for the new data
- * in the key and ptr regions of the block.
- */
- kp = XFS_INOBT_KEY_ADDR(block, 1, cur);
- pp = XFS_INOBT_PTR_ADDR(block, 1, cur);
-#ifdef DEBUG
- for (i = numrecs; i >= ptr; i--) {
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(pp[i - 1]), level)))
- return error;
- }
-#endif
- memmove(&kp[ptr], &kp[ptr - 1],
- (numrecs - ptr + 1) * sizeof(*kp));
- memmove(&pp[ptr], &pp[ptr - 1],
- (numrecs - ptr + 1) * sizeof(*pp));
- /*
- * Now stuff the new data in, bump numrecs and log the new data.
- */
-#ifdef DEBUG
- if ((error = xfs_btree_check_sptr(cur, *bnop, level)))
- return error;
-#endif
- kp[ptr - 1] = key;
- pp[ptr - 1] = cpu_to_be32(*bnop);
- numrecs++;
- block->bb_numrecs = cpu_to_be16(numrecs);
- xfs_inobt_log_keys(cur, bp, ptr, numrecs);
- xfs_inobt_log_ptrs(cur, bp, ptr, numrecs);
- } else {
- /*
- * It's a leaf entry. Make a hole for the new record.
- */
- rp = XFS_INOBT_REC_ADDR(block, 1, cur);
- memmove(&rp[ptr], &rp[ptr - 1],
- (numrecs - ptr + 1) * sizeof(*rp));
- /*
- * Now stuff the new record in, bump numrecs
- * and log the new data.
- */
- rp[ptr - 1] = *recp;
- numrecs++;
- block->bb_numrecs = cpu_to_be16(numrecs);
- xfs_inobt_log_recs(cur, bp, ptr, numrecs);
- }
- /*
- * Log the new number of records in the btree header.
- */
- xfs_inobt_log_block(cur->bc_tp, bp, XFS_BB_NUMRECS);
-#ifdef DEBUG
- /*
- * Check that the key/record is in the right place, now.
- */
- if (ptr < numrecs) {
- if (level == 0)
- xfs_btree_check_rec(cur->bc_btnum, rp + ptr - 1,
- rp + ptr);
- else
- xfs_btree_check_key(cur->bc_btnum, kp + ptr - 1,
- kp + ptr);
- }
-#endif
- /*
- * If we inserted at the start of a block, update the parents' keys.
- */
- if (optr == 1 && (error = xfs_inobt_updkey(cur, &key, level + 1)))
- return error;
- /*
- * Return the new block number, if any.
- * If there is one, give back a record value and a cursor too.
- */
- *bnop = nbno;
- if (nbno != NULLAGBLOCK) {
- *recp = nrec;
- *curp = ncur;
- }
+ 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;
}
-/*
- * Log header fields from a btree block.
- */
-STATIC void
-xfs_inobt_log_block(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_buf_t *bp, /* buffer containing btree block */
- int fields) /* mask of fields: XFS_BB_... */
+STATIC int
+xfs_inobt_free_block(
+ struct xfs_btree_cur *cur,
+ struct xfs_buf *bp)
{
- int first; /* first byte offset logged */
- int last; /* last byte offset logged */
- static const short offsets[] = { /* table of offsets */
- offsetof(xfs_inobt_block_t, bb_magic),
- offsetof(xfs_inobt_block_t, bb_level),
- offsetof(xfs_inobt_block_t, bb_numrecs),
- offsetof(xfs_inobt_block_t, bb_leftsib),
- offsetof(xfs_inobt_block_t, bb_rightsib),
- sizeof(xfs_inobt_block_t)
- };
+ xfs_fsblock_t fsbno;
+ int error;
- xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first, &last);
- xfs_trans_log_buf(tp, bp, first, last);
+ 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;
}
-/*
- * Log keys from a btree block (nonleaf).
- */
-STATIC void
-xfs_inobt_log_keys(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_buf_t *bp, /* buffer containing btree block */
- int kfirst, /* index of first key to log */
- int klast) /* index of last key to log */
+STATIC int
+xfs_inobt_get_maxrecs(
+ struct xfs_btree_cur *cur,
+ int level)
{
- xfs_inobt_block_t *block; /* btree block to log from */
- int first; /* first byte offset logged */
- xfs_inobt_key_t *kp; /* key pointer in btree block */
- int last; /* last byte offset logged */
-
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- kp = XFS_INOBT_KEY_ADDR(block, 1, cur);
- first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block);
- last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block);
- xfs_trans_log_buf(cur->bc_tp, bp, first, last);
+ return cur->bc_mp->m_inobt_mxr[level != 0];
}
-/*
- * Log block pointer fields from a btree block (nonleaf).
- */
STATIC void
-xfs_inobt_log_ptrs(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_buf_t *bp, /* buffer containing btree block */
- int pfirst, /* index of first pointer to log */
- int plast) /* index of last pointer to log */
+xfs_inobt_init_key_from_rec(
+ union xfs_btree_key *key,
+ union xfs_btree_rec *rec)
{
- xfs_inobt_block_t *block; /* btree block to log from */
- int first; /* first byte offset logged */
- int last; /* last byte offset logged */
- xfs_inobt_ptr_t *pp; /* block-pointer pointer in btree blk */
-
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- pp = XFS_INOBT_PTR_ADDR(block, 1, cur);
- first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block);
- last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block);
- xfs_trans_log_buf(cur->bc_tp, bp, first, last);
+ key->inobt.ir_startino = rec->inobt.ir_startino;
}
-/*
- * Log records from a btree block (leaf).
- */
STATIC void
-xfs_inobt_log_recs(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_buf_t *bp, /* buffer containing btree block */
- int rfirst, /* index of first record to log */
- int rlast) /* index of last record to log */
+xfs_inobt_init_rec_from_key(
+ union xfs_btree_key *key,
+ union xfs_btree_rec *rec)
{
- xfs_inobt_block_t *block; /* btree block to log from */
- int first; /* first byte offset logged */
- int last; /* last byte offset logged */
- xfs_inobt_rec_t *rp; /* record pointer for btree block */
+ rec->inobt.ir_startino = key->inobt.ir_startino;
+}
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- rp = XFS_INOBT_REC_ADDR(block, 1, cur);
- first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block);
- last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block);
- xfs_trans_log_buf(cur->bc_tp, bp, first, last);
+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);
}
/*
- * Lookup the record. The cursor is made to point to it, based on dir.
- * Return 0 if can't find any such record, 1 for success.
+ * intial value of ptr for lookup
*/
-STATIC int /* error */
-xfs_inobt_lookup(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_lookup_t dir, /* <=, ==, or >= */
- int *stat) /* success/failure */
+STATIC void
+xfs_inobt_init_ptr_from_cur(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_ptr *ptr)
{
- xfs_agblock_t agbno; /* a.g. relative btree block number */
- xfs_agnumber_t agno; /* allocation group number */
- xfs_inobt_block_t *block=NULL; /* current btree block */
- __int64_t diff; /* difference for the current key */
- int error; /* error return value */
- int keyno=0; /* current key number */
- int level; /* level in the btree */
- xfs_mount_t *mp; /* file system mount point */
-
- /*
- * Get the allocation group header, and the root block number.
- */
- mp = cur->bc_mp;
- {
- xfs_agi_t *agi; /* a.g. inode header */
-
- agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
- agno = be32_to_cpu(agi->agi_seqno);
- agbno = be32_to_cpu(agi->agi_root);
- }
- /*
- * Iterate over each level in the btree, starting at the root.
- * For each level above the leaves, find the key we need, based
- * on the lookup record, then follow the corresponding block
- * pointer down to the next level.
- */
- for (level = cur->bc_nlevels - 1, diff = 1; level >= 0; level--) {
- xfs_buf_t *bp; /* buffer pointer for btree block */
- xfs_daddr_t d; /* disk address of btree block */
-
- /*
- * Get the disk address we're looking for.
- */
- d = XFS_AGB_TO_DADDR(mp, agno, agbno);
- /*
- * If the old buffer at this level is for a different block,
- * throw it away, otherwise just use it.
- */
- bp = cur->bc_bufs[level];
- if (bp && XFS_BUF_ADDR(bp) != d)
- bp = NULL;
- if (!bp) {
- /*
- * Need to get a new buffer. Read it, then
- * set it in the cursor, releasing the old one.
- */
- if ((error = xfs_btree_read_bufs(mp, cur->bc_tp,
- agno, agbno, 0, &bp, XFS_INO_BTREE_REF)))
- return error;
- xfs_btree_setbuf(cur, level, bp);
- /*
- * Point to the btree block, now that we have the buffer
- */
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- if ((error = xfs_btree_check_sblock(cur, block, level,
- bp)))
- return error;
- } else
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- /*
- * If we already had a key match at a higher level, we know
- * we need to use the first entry in this block.
- */
- if (diff == 0)
- keyno = 1;
- /*
- * Otherwise we need to search this block. Do a binary search.
- */
- else {
- int high; /* high entry number */
- xfs_inobt_key_t *kkbase=NULL;/* base of keys in block */
- xfs_inobt_rec_t *krbase=NULL;/* base of records in block */
- int low; /* low entry number */
+ struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
- /*
- * Get a pointer to keys or records.
- */
- if (level > 0)
- kkbase = XFS_INOBT_KEY_ADDR(block, 1, cur);
- else
- krbase = XFS_INOBT_REC_ADDR(block, 1, cur);
- /*
- * Set low and high entry numbers, 1-based.
- */
- low = 1;
- if (!(high = be16_to_cpu(block->bb_numrecs))) {
- /*
- * If the block is empty, the tree must
- * be an empty leaf.
- */
- ASSERT(level == 0 && cur->bc_nlevels == 1);
- cur->bc_ptrs[0] = dir != XFS_LOOKUP_LE;
- *stat = 0;
- return 0;
- }
- /*
- * Binary search the block.
- */
- while (low <= high) {
- xfs_agino_t startino; /* key value */
-
- /*
- * keyno is average of low and high.
- */
- keyno = (low + high) >> 1;
- /*
- * Get startino.
- */
- if (level > 0) {
- xfs_inobt_key_t *kkp;
-
- kkp = kkbase + keyno - 1;
- startino = be32_to_cpu(kkp->ir_startino);
- } else {
- xfs_inobt_rec_t *krp;
-
- krp = krbase + keyno - 1;
- startino = be32_to_cpu(krp->ir_startino);
- }
- /*
- * Compute difference to get next direction.
- */
- diff = (__int64_t)
- startino - cur->bc_rec.i.ir_startino;
- /*
- * Less than, move right.
- */
- if (diff < 0)
- low = keyno + 1;
- /*
- * Greater than, move left.
- */
- else if (diff > 0)
- high = keyno - 1;
- /*
- * Equal, we're done.
- */
- else
- break;
- }
- }
- /*
- * If there are more levels, set up for the next level
- * by getting the block number and filling in the cursor.
- */
- if (level > 0) {
- /*
- * If we moved left, need the previous key number,
- * unless there isn't one.
- */
- if (diff > 0 && --keyno < 1)
- keyno = 1;
- agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, keyno, cur));
-#ifdef DEBUG
- if ((error = xfs_btree_check_sptr(cur, agbno, level)))
- return error;
-#endif
- cur->bc_ptrs[level] = keyno;
- }
- }
- /*
- * Done with the search.
- * See if we need to adjust the results.
- */
- if (dir != XFS_LOOKUP_LE && diff < 0) {
- keyno++;
- /*
- * If ge search and we went off the end of the block, but it's
- * not the last block, we're in the wrong block.
- */
- if (dir == XFS_LOOKUP_GE &&
- keyno > be16_to_cpu(block->bb_numrecs) &&
- be32_to_cpu(block->bb_rightsib) != NULLAGBLOCK) {
- int i;
+ ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
- cur->bc_ptrs[0] = keyno;
- if ((error = xfs_inobt_increment(cur, 0, &i)))
- return error;
- ASSERT(i == 1);
- *stat = 1;
- return 0;
- }
- }
- else if (dir == XFS_LOOKUP_LE && diff > 0)
- keyno--;
- cur->bc_ptrs[0] = keyno;
- /*
- * Return if we succeeded or not.
- */
- if (keyno == 0 || keyno > be16_to_cpu(block->bb_numrecs))
- *stat = 0;
- else
- *stat = ((dir != XFS_LOOKUP_EQ) || (diff == 0));
- return 0;
+ ptr->s = agi->agi_root;
}
-/*
- * Move 1 record left from cur/level if possible.
- * Update cur to reflect the new path.
- */
-STATIC int /* error */
-xfs_inobt_lshift(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level to shift record on */
- int *stat) /* success/failure */
+STATIC __int64_t
+xfs_inobt_key_diff(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_key *key)
{
- int error; /* error return value */
-#ifdef DEBUG
- int i; /* loop index */
-#endif
- xfs_inobt_key_t key; /* key value for leaf level upward */
- xfs_buf_t *lbp; /* buffer for left neighbor block */
- xfs_inobt_block_t *left; /* left neighbor btree block */
- xfs_inobt_key_t *lkp=NULL; /* key pointer for left block */
- xfs_inobt_ptr_t *lpp; /* address pointer for left block */
- xfs_inobt_rec_t *lrp=NULL; /* record pointer for left block */
- int nrec; /* new number of left block entries */
- xfs_buf_t *rbp; /* buffer for right (current) block */
- xfs_inobt_block_t *right; /* right (current) btree block */
- xfs_inobt_key_t *rkp=NULL; /* key pointer for right block */
- xfs_inobt_ptr_t *rpp=NULL; /* address pointer for right block */
- xfs_inobt_rec_t *rrp=NULL; /* record pointer for right block */
-
- /*
- * Set up variables for this block as "right".
- */
- rbp = cur->bc_bufs[level];
- right = XFS_BUF_TO_INOBT_BLOCK(rbp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, right, level, rbp)))
- return error;
-#endif
- /*
- * If we've got no left sibling then we can't shift an entry left.
- */
- if (be32_to_cpu(right->bb_leftsib) == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- /*
- * If the cursor entry is the one that would be moved, don't
- * do it... it's too complicated.
- */
- if (cur->bc_ptrs[level] <= 1) {
- *stat = 0;
- return 0;
- }
- /*
- * Set up the left neighbor as "left".
- */
- if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp,
- cur->bc_private.a.agno, be32_to_cpu(right->bb_leftsib),
- 0, &lbp, XFS_INO_BTREE_REF)))
- return error;
- left = XFS_BUF_TO_INOBT_BLOCK(lbp);
- if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
- return error;
- /*
- * If it's full, it can't take another entry.
- */
- if (be16_to_cpu(left->bb_numrecs) == XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
- *stat = 0;
- return 0;
- }
- nrec = be16_to_cpu(left->bb_numrecs) + 1;
- /*
- * If non-leaf, copy a key and a ptr to the left block.
- */
- if (level > 0) {
- lkp = XFS_INOBT_KEY_ADDR(left, nrec, cur);
- rkp = XFS_INOBT_KEY_ADDR(right, 1, cur);
- *lkp = *rkp;
- xfs_inobt_log_keys(cur, lbp, nrec, nrec);
- lpp = XFS_INOBT_PTR_ADDR(left, nrec, cur);
- rpp = XFS_INOBT_PTR_ADDR(right, 1, cur);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(*rpp), level)))
- return error;
-#endif
- *lpp = *rpp;
- xfs_inobt_log_ptrs(cur, lbp, nrec, nrec);
- }
- /*
- * If leaf, copy a record to the left block.
- */
- else {
- lrp = XFS_INOBT_REC_ADDR(left, nrec, cur);
- rrp = XFS_INOBT_REC_ADDR(right, 1, cur);
- *lrp = *rrp;
- xfs_inobt_log_recs(cur, lbp, nrec, nrec);
- }
- /*
- * Bump and log left's numrecs, decrement and log right's numrecs.
- */
- be16_add_cpu(&left->bb_numrecs, 1);
- xfs_inobt_log_block(cur->bc_tp, lbp, XFS_BB_NUMRECS);
-#ifdef DEBUG
- if (level > 0)
- xfs_btree_check_key(cur->bc_btnum, lkp - 1, lkp);
- else
- xfs_btree_check_rec(cur->bc_btnum, lrp - 1, lrp);
-#endif
- be16_add_cpu(&right->bb_numrecs, -1);
- xfs_inobt_log_block(cur->bc_tp, rbp, XFS_BB_NUMRECS);
- /*
- * Slide the contents of right down one entry.
- */
- if (level > 0) {
-#ifdef DEBUG
- for (i = 0; i < be16_to_cpu(right->bb_numrecs); i++) {
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(rpp[i + 1]),
- level)))
- return error;
- }
-#endif
- memmove(rkp, rkp + 1, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
- memmove(rpp, rpp + 1, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
- xfs_inobt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
- xfs_inobt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
- } else {
- memmove(rrp, rrp + 1, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
- xfs_inobt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
- key.ir_startino = rrp->ir_startino;
- rkp = &key;
- }
- /*
- * Update the parent key values of right.
- */
- if ((error = xfs_inobt_updkey(cur, rkp, level + 1)))
- return error;
- /*
- * Slide the cursor value left one.
- */
- cur->bc_ptrs[level]--;
- *stat = 1;
- return 0;
+ return (__int64_t)be32_to_cpu(key->inobt.ir_startino) -
+ cur->bc_rec.i.ir_startino;
}
-/*
- * 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 */
+STATIC int
+xfs_inobt_kill_root(
+ struct xfs_btree_cur *cur,
+ struct xfs_buf *bp,
+ int level,
+ union xfs_btree_ptr *newroot)
{
- 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 */
+ int error;
- ASSERT(cur->bc_nlevels < XFS_IN_MAXLEVELS(cur->bc_mp));
+ XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY);
+ XFS_BTREE_STATS_INC(cur, killroot);
/*
- * Get a block & a buffer.
+ * Update the root pointer, decreasing the level by 1 and then
+ * free the old root.
*/
- 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)))
+ xfs_inobt_set_root(cur, newroot, -1);
+ error = xfs_inobt_free_block(cur, bp);
+ if (error) {
+ XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
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;
-}
-/*
- * Move 1 record right from cur/level if possible.
- * Update cur to reflect the new path.
- */
-STATIC int /* error */
-xfs_inobt_rshift(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level to shift record on */
- int *stat) /* success/failure */
-{
- int error; /* error return value */
- int i; /* loop index */
- xfs_inobt_key_t key; /* key value for leaf level upward */
- xfs_buf_t *lbp; /* buffer for left (current) block */
- xfs_inobt_block_t *left; /* left (current) btree block */
- xfs_inobt_key_t *lkp; /* key pointer for left block */
- xfs_inobt_ptr_t *lpp; /* address pointer for left block */
- xfs_inobt_rec_t *lrp; /* record pointer for left block */
- xfs_buf_t *rbp; /* buffer for right neighbor block */
- xfs_inobt_block_t *right; /* right neighbor btree block */
- xfs_inobt_key_t *rkp; /* key pointer for right block */
- xfs_inobt_ptr_t *rpp; /* address pointer for right block */
- xfs_inobt_rec_t *rrp=NULL; /* record pointer for right block */
- xfs_btree_cur_t *tcur; /* temporary cursor */
+ XFS_BTREE_STATS_INC(cur, free);
- /*
- * Set up variables for this block as "left".
- */
- lbp = cur->bc_bufs[level];
- left = XFS_BUF_TO_INOBT_BLOCK(lbp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
- return error;
-#endif
- /*
- * If we've got no right sibling then we can't shift an entry right.
- */
- if (be32_to_cpu(left->bb_rightsib) == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- /*
- * If the cursor entry is the one that would be moved, don't
- * do it... it's too complicated.
- */
- if (cur->bc_ptrs[level] >= be16_to_cpu(left->bb_numrecs)) {
- *stat = 0;
- return 0;
- }
- /*
- * Set up the right neighbor as "right".
- */
- if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp,
- cur->bc_private.a.agno, be32_to_cpu(left->bb_rightsib),
- 0, &rbp, XFS_INO_BTREE_REF)))
- return error;
- right = XFS_BUF_TO_INOBT_BLOCK(rbp);
- if ((error = xfs_btree_check_sblock(cur, right, level, rbp)))
- return error;
- /*
- * If it's full, it can't take another entry.
- */
- if (be16_to_cpu(right->bb_numrecs) == XFS_INOBT_BLOCK_MAXRECS(level, cur)) {
- *stat = 0;
- return 0;
- }
- /*
- * Make a hole at the start of the right neighbor block, then
- * copy the last left block entry to the hole.
- */
- if (level > 0) {
- lkp = XFS_INOBT_KEY_ADDR(left, be16_to_cpu(left->bb_numrecs), cur);
- lpp = XFS_INOBT_PTR_ADDR(left, be16_to_cpu(left->bb_numrecs), cur);
- rkp = XFS_INOBT_KEY_ADDR(right, 1, cur);
- rpp = XFS_INOBT_PTR_ADDR(right, 1, cur);
-#ifdef DEBUG
- for (i = be16_to_cpu(right->bb_numrecs) - 1; i >= 0; i--) {
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(rpp[i]), level)))
- return error;
- }
-#endif
- memmove(rkp + 1, rkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
- memmove(rpp + 1, rpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
-#ifdef DEBUG
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(*lpp), level)))
- return error;
-#endif
- *rkp = *lkp;
- *rpp = *lpp;
- xfs_inobt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
- xfs_inobt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
- } else {
- lrp = XFS_INOBT_REC_ADDR(left, be16_to_cpu(left->bb_numrecs), cur);
- rrp = XFS_INOBT_REC_ADDR(right, 1, cur);
- memmove(rrp + 1, rrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
- *rrp = *lrp;
- xfs_inobt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs) + 1);
- key.ir_startino = rrp->ir_startino;
- rkp = &key;
- }
- /*
- * Decrement and log left's numrecs, bump and log right's numrecs.
- */
- be16_add_cpu(&left->bb_numrecs, -1);
- xfs_inobt_log_block(cur->bc_tp, lbp, XFS_BB_NUMRECS);
- be16_add_cpu(&right->bb_numrecs, 1);
-#ifdef DEBUG
- if (level > 0)
- xfs_btree_check_key(cur->bc_btnum, rkp, rkp + 1);
- else
- xfs_btree_check_rec(cur->bc_btnum, rrp, rrp + 1);
-#endif
- xfs_inobt_log_block(cur->bc_tp, rbp, XFS_BB_NUMRECS);
- /*
- * Using a temporary cursor, update the parent key values of the
- * block on the right.
- */
- if ((error = xfs_btree_dup_cursor(cur, &tcur)))
- return error;
- xfs_btree_lastrec(tcur, level);
- if ((error = xfs_inobt_increment(tcur, level, &i)) ||
- (error = xfs_inobt_updkey(tcur, rkp, level + 1))) {
- xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
- return error;
- }
- xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR);
- *stat = 1;
+ cur->bc_bufs[level] = NULL;
+ cur->bc_nlevels--;
+
+ XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
return 0;
}
-/*
- * Split cur/level block in half.
- * Return new block number and its first record (to be inserted into parent).
- */
-STATIC int /* error */
-xfs_inobt_split(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level to split */
- xfs_agblock_t *bnop, /* output: block number allocated */
- xfs_inobt_key_t *keyp, /* output: first key of new block */
- xfs_btree_cur_t **curp, /* output: new cursor */
- int *stat) /* success/failure */
-{
- xfs_alloc_arg_t args; /* allocation argument structure */
- int error; /* error return value */
- int i; /* loop index/record number */
- xfs_agblock_t lbno; /* left (current) block number */
- xfs_buf_t *lbp; /* buffer for left block */
- xfs_inobt_block_t *left; /* left (current) btree block */
- xfs_inobt_key_t *lkp; /* left btree key pointer */
- xfs_inobt_ptr_t *lpp; /* left btree address pointer */
- xfs_inobt_rec_t *lrp; /* left btree record pointer */
- xfs_buf_t *rbp; /* buffer for right block */
- xfs_inobt_block_t *right; /* right (new) btree block */
- xfs_inobt_key_t *rkp; /* right btree key pointer */
- xfs_inobt_ptr_t *rpp; /* right btree address pointer */
- xfs_inobt_rec_t *rrp; /* right btree record pointer */
-
- /*
- * Set up left block (current one).
- */
- lbp = cur->bc_bufs[level];
- args.tp = cur->bc_tp;
- args.mp = cur->bc_mp;
- lbno = XFS_DADDR_TO_AGBNO(args.mp, XFS_BUF_ADDR(lbp));
- /*
- * Allocate the new block.
- * If we can't do it, we're toast. Give up.
- */
- args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, lbno);
- 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;
- if (args.fsbno == NULLFSBLOCK) {
- *stat = 0;
- return 0;
- }
- ASSERT(args.len == 1);
- rbp = xfs_btree_get_bufs(args.mp, args.tp, args.agno, args.agbno, 0);
- /*
- * Set up the new block as "right".
- */
- right = XFS_BUF_TO_INOBT_BLOCK(rbp);
- /*
- * "Left" is the current (according to the cursor) block.
- */
- left = XFS_BUF_TO_INOBT_BLOCK(lbp);
#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, left, level, lbp)))
- return error;
-#endif
- /*
- * Fill in the btree header for the new block.
- */
- right->bb_magic = cpu_to_be32(xfs_magics[cur->bc_btnum]);
- right->bb_level = left->bb_level;
- right->bb_numrecs = cpu_to_be16(be16_to_cpu(left->bb_numrecs) / 2);
- /*
- * Make sure that if there's an odd number of entries now, that
- * each new block will have the same number of entries.
- */
- if ((be16_to_cpu(left->bb_numrecs) & 1) &&
- cur->bc_ptrs[level] <= be16_to_cpu(right->bb_numrecs) + 1)
- be16_add_cpu(&right->bb_numrecs, 1);
- i = be16_to_cpu(left->bb_numrecs) - be16_to_cpu(right->bb_numrecs) + 1;
- /*
- * For non-leaf blocks, copy keys and addresses over to the new block.
- */
- if (level > 0) {
- lkp = XFS_INOBT_KEY_ADDR(left, i, cur);
- lpp = XFS_INOBT_PTR_ADDR(left, i, cur);
- rkp = XFS_INOBT_KEY_ADDR(right, 1, cur);
- rpp = XFS_INOBT_PTR_ADDR(right, 1, cur);
-#ifdef DEBUG
- for (i = 0; i < be16_to_cpu(right->bb_numrecs); i++) {
- if ((error = xfs_btree_check_sptr(cur, be32_to_cpu(lpp[i]), level)))
- return error;
- }
-#endif
- memcpy(rkp, lkp, be16_to_cpu(right->bb_numrecs) * sizeof(*rkp));
- memcpy(rpp, lpp, be16_to_cpu(right->bb_numrecs) * sizeof(*rpp));
- xfs_inobt_log_keys(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
- xfs_inobt_log_ptrs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
- *keyp = *rkp;
- }
- /*
- * For leaf blocks, copy records over to the new block.
- */
- else {
- lrp = XFS_INOBT_REC_ADDR(left, i, cur);
- rrp = XFS_INOBT_REC_ADDR(right, 1, cur);
- memcpy(rrp, lrp, be16_to_cpu(right->bb_numrecs) * sizeof(*rrp));
- xfs_inobt_log_recs(cur, rbp, 1, be16_to_cpu(right->bb_numrecs));
- keyp->ir_startino = rrp->ir_startino;
- }
- /*
- * Find the left block number by looking in the buffer.
- * Adjust numrecs, sibling pointers.
- */
- be16_add_cpu(&left->bb_numrecs, -(be16_to_cpu(right->bb_numrecs)));
- right->bb_rightsib = left->bb_rightsib;
- left->bb_rightsib = cpu_to_be32(args.agbno);
- right->bb_leftsib = cpu_to_be32(lbno);
- xfs_inobt_log_block(args.tp, rbp, XFS_BB_ALL_BITS);
- xfs_inobt_log_block(args.tp, lbp, XFS_BB_NUMRECS | XFS_BB_RIGHTSIB);
- /*
- * If there's a block to the new block's right, make that block
- * point back to right instead of to left.
- */
- if (be32_to_cpu(right->bb_rightsib) != NULLAGBLOCK) {
- xfs_inobt_block_t *rrblock; /* rr btree block */
- xfs_buf_t *rrbp; /* buffer for rrblock */
-
- if ((error = xfs_btree_read_bufs(args.mp, args.tp, args.agno,
- be32_to_cpu(right->bb_rightsib), 0, &rrbp,
- XFS_INO_BTREE_REF)))
- return error;
- rrblock = XFS_BUF_TO_INOBT_BLOCK(rrbp);
- if ((error = xfs_btree_check_sblock(cur, rrblock, level, rrbp)))
- return error;
- rrblock->bb_leftsib = cpu_to_be32(args.agbno);
- xfs_inobt_log_block(args.tp, rrbp, XFS_BB_LEFTSIB);
- }
- /*
- * If the cursor is really in the right block, move it there.
- * If it's just pointing past the last entry in left, then we'll
- * insert there, so don't change anything in that case.
- */
- if (cur->bc_ptrs[level] > be16_to_cpu(left->bb_numrecs) + 1) {
- xfs_btree_setbuf(cur, level, rbp);
- cur->bc_ptrs[level] -= be16_to_cpu(left->bb_numrecs);
- }
- /*
- * If there are more levels, we'll need another cursor which refers
- * the right block, no matter where this cursor was.
- */
- if (level + 1 < cur->bc_nlevels) {
- if ((error = xfs_btree_dup_cursor(cur, curp)))
- return error;
- (*curp)->bc_ptrs[level + 1]++;
- }
- *bnop = args.agbno;
- *stat = 1;
- return 0;
+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);
}
-/*
- * Update keys at all levels from here to the root along the cursor's path.
- */
-STATIC int /* error */
-xfs_inobt_updkey(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_inobt_key_t *keyp, /* new key value to update to */
- int level) /* starting level for update */
+STATIC int
+xfs_inobt_recs_inorder(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_rec *r1,
+ union xfs_btree_rec *r2)
{
- int ptr; /* index of key in block */
-
- /*
- * Go up the tree from this level toward the root.
- * At each level, update the key value to the value input.
- * Stop when we reach a level where the cursor isn't pointing
- * at the first entry in the block.
- */
- for (ptr = 1; ptr == 1 && level < cur->bc_nlevels; level++) {
- xfs_buf_t *bp; /* buffer for block */
- xfs_inobt_block_t *block; /* btree block */
-#ifdef DEBUG
- int error; /* error return value */
-#endif
- xfs_inobt_key_t *kp; /* ptr to btree block keys */
-
- bp = cur->bc_bufs[level];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level, bp)))
- return error;
-#endif
- ptr = cur->bc_ptrs[level];
- kp = XFS_INOBT_KEY_ADDR(block, ptr, cur);
- *kp = *keyp;
- xfs_inobt_log_keys(cur, bp, ptr, ptr);
- }
- return 0;
+ return be32_to_cpu(r1->inobt.ir_startino) + XFS_INODES_PER_CHUNK <=
+ be32_to_cpu(r2->inobt.ir_startino);
}
+#endif /* DEBUG */
-/*
- * Externally visible routines.
- */
+#ifdef XFS_BTREE_TRACE
+ktrace_t *xfs_inobt_trace_buf;
-/*
- * Decrement cursor by one record at the level.
- * For nonzero levels the leaf-ward information is untouched.
- */
-int /* error */
-xfs_inobt_decrement(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level in btree, 0 is leaf */
- int *stat) /* success/failure */
+STATIC void
+xfs_inobt_trace_enter(
+ struct xfs_btree_cur *cur,
+ const char *func,
+ char *s,
+ int type,
+ int line,
+ __psunsigned_t a0,
+ __psunsigned_t a1,
+ __psunsigned_t a2,
+ __psunsigned_t a3,
+ __psunsigned_t a4,
+ __psunsigned_t a5,
+ __psunsigned_t a6,
+ __psunsigned_t a7,
+ __psunsigned_t a8,
+ __psunsigned_t a9,
+ __psunsigned_t a10)
{
- xfs_inobt_block_t *block; /* btree block */
- int error;
- int lev; /* btree level */
-
- ASSERT(level < cur->bc_nlevels);
- /*
- * Read-ahead to the left at this level.
- */
- xfs_btree_readahead(cur, level, XFS_BTCUR_LEFTRA);
- /*
- * Decrement the ptr at this level. If we're still in the block
- * then we're done.
- */
- if (--cur->bc_ptrs[level] > 0) {
- *stat = 1;
- return 0;
- }
- /*
- * Get a pointer to the btree block.
- */
- block = XFS_BUF_TO_INOBT_BLOCK(cur->bc_bufs[level]);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level,
- cur->bc_bufs[level])))
- return error;
-#endif
- /*
- * If we just went off the left edge of the tree, return failure.
- */
- if (be32_to_cpu(block->bb_leftsib) == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- /*
- * March up the tree decrementing pointers.
- * Stop when we don't go off the left edge of a block.
- */
- for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
- if (--cur->bc_ptrs[lev] > 0)
- break;
- /*
- * Read-ahead the left block, we're going to read it
- * in the next loop.
- */
- xfs_btree_readahead(cur, lev, XFS_BTCUR_LEFTRA);
- }
- /*
- * If we went off the root then we are seriously confused.
- */
- ASSERT(lev < cur->bc_nlevels);
- /*
- * Now walk back down the tree, fixing up the cursor's buffer
- * pointers and key numbers.
- */
- for (block = XFS_BUF_TO_INOBT_BLOCK(cur->bc_bufs[lev]); lev > level; ) {
- xfs_agblock_t agbno; /* block number of btree block */
- xfs_buf_t *bp; /* buffer containing btree block */
-
- agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, cur->bc_ptrs[lev], cur));
- if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp,
- cur->bc_private.a.agno, agbno, 0, &bp,
- XFS_INO_BTREE_REF)))
- return error;
- lev--;
- xfs_btree_setbuf(cur, lev, bp);
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- if ((error = xfs_btree_check_sblock(cur, block, lev, bp)))
- return error;
- cur->bc_ptrs[lev] = be16_to_cpu(block->bb_numrecs);
- }
- *stat = 1;
- return 0;
+ ktrace_enter(xfs_inobt_trace_buf, (void *)(__psint_t)type,
+ (void *)func, (void *)s, NULL, (void *)cur,
+ (void *)a0, (void *)a1, (void *)a2, (void *)a3,
+ (void *)a4, (void *)a5, (void *)a6, (void *)a7,
+ (void *)a8, (void *)a9, (void *)a10);
}
-/*
- * Delete the record pointed to by cur.
- * The cursor refers to the place where the record was (could be inserted)
- * when the operation returns.
- */
-int /* error */
-xfs_inobt_delete(
- xfs_btree_cur_t *cur, /* btree cursor */
- int *stat) /* success/failure */
+STATIC void
+xfs_inobt_trace_cursor(
+ struct xfs_btree_cur *cur,
+ __uint32_t *s0,
+ __uint64_t *l0,
+ __uint64_t *l1)
{
- int error;
- int i; /* result code */
- int level; /* btree level */
-
- /*
- * Go up the tree, starting at leaf level.
- * If 2 is returned then a join was done; go to the next level.
- * Otherwise we are done.
- */
- for (level = 0, i = 2; i == 2; level++) {
- if ((error = xfs_inobt_delrec(cur, level, &i)))
- return error;
- }
- if (i == 0) {
- for (level = 1; level < cur->bc_nlevels; level++) {
- if (cur->bc_ptrs[level] == 0) {
- if ((error = xfs_inobt_decrement(cur, level, &i)))
- return error;
- break;
- }
- }
- }
- *stat = i;
- return 0;
+ *s0 = cur->bc_private.a.agno;
+ *l0 = cur->bc_rec.i.ir_startino;
+ *l1 = cur->bc_rec.i.ir_free;
}
-
-/*
- * Get the data from the pointed-to record.
- */
-int /* error */
-xfs_inobt_get_rec(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t *ino, /* output: starting inode of chunk */
- __int32_t *fcnt, /* output: number of free inodes */
- xfs_inofree_t *free, /* output: free inode mask */
- int *stat) /* output: success/failure */
+STATIC void
+xfs_inobt_trace_key(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_key *key,
+ __uint64_t *l0,
+ __uint64_t *l1)
{
- xfs_inobt_block_t *block; /* btree block */
- xfs_buf_t *bp; /* buffer containing btree block */
-#ifdef DEBUG
- int error; /* error return value */
-#endif
- int ptr; /* record number */
- xfs_inobt_rec_t *rec; /* record data */
-
- bp = cur->bc_bufs[0];
- ptr = cur->bc_ptrs[0];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, 0, bp)))
- return error;
-#endif
- /*
- * Off the right end or left end, return failure.
- */
- if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) {
- *stat = 0;
- return 0;
- }
- /*
- * Point to the record and extract its data.
- */
- rec = XFS_INOBT_REC_ADDR(block, ptr, cur);
- *ino = be32_to_cpu(rec->ir_startino);
- *fcnt = be32_to_cpu(rec->ir_freecount);
- *free = be64_to_cpu(rec->ir_free);
- *stat = 1;
- return 0;
+ *l0 = be32_to_cpu(key->inobt.ir_startino);
+ *l1 = 0;
}
-/*
- * Increment cursor by one record at the level.
- * For nonzero levels the leaf-ward information is untouched.
- */
-int /* error */
-xfs_inobt_increment(
- xfs_btree_cur_t *cur, /* btree cursor */
- int level, /* level in btree, 0 is leaf */
- int *stat) /* success/failure */
+STATIC void
+xfs_inobt_trace_record(
+ struct xfs_btree_cur *cur,
+ union xfs_btree_rec *rec,
+ __uint64_t *l0,
+ __uint64_t *l1,
+ __uint64_t *l2)
{
- xfs_inobt_block_t *block; /* btree block */
- xfs_buf_t *bp; /* buffer containing btree block */
- int error; /* error return value */
- int lev; /* btree level */
+ *l0 = be32_to_cpu(rec->inobt.ir_startino);
+ *l1 = be32_to_cpu(rec->inobt.ir_freecount);
+ *l2 = be64_to_cpu(rec->inobt.ir_free);
+}
+#endif /* XFS_BTREE_TRACE */
+
+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,
+ .kill_root = xfs_inobt_kill_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,
- ASSERT(level < cur->bc_nlevels);
- /*
- * Read-ahead to the right at this level.
- */
- xfs_btree_readahead(cur, level, XFS_BTCUR_RIGHTRA);
- /*
- * Get a pointer to the btree block.
- */
- bp = cur->bc_bufs[level];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, level, bp)))
- return error;
-#endif
- /*
- * Increment the ptr at this level. If we're still in the block
- * then we're done.
- */
- if (++cur->bc_ptrs[level] <= be16_to_cpu(block->bb_numrecs)) {
- *stat = 1;
- return 0;
- }
- /*
- * If we just went off the right edge of the tree, return failure.
- */
- if (be32_to_cpu(block->bb_rightsib) == NULLAGBLOCK) {
- *stat = 0;
- return 0;
- }
- /*
- * March up the tree incrementing pointers.
- * Stop when we don't go off the right edge of a block.
- */
- for (lev = level + 1; lev < cur->bc_nlevels; lev++) {
- bp = cur->bc_bufs[lev];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, lev, bp)))
- return error;
+ .keys_inorder = xfs_inobt_keys_inorder,
+ .recs_inorder = xfs_inobt_recs_inorder,
#endif
- if (++cur->bc_ptrs[lev] <= be16_to_cpu(block->bb_numrecs))
- break;
- /*
- * Read-ahead the right block, we're going to read it
- * in the next loop.
- */
- xfs_btree_readahead(cur, lev, XFS_BTCUR_RIGHTRA);
- }
- /*
- * If we went off the root then we are seriously confused.
- */
- ASSERT(lev < cur->bc_nlevels);
- /*
- * Now walk back down the tree, fixing up the cursor's buffer
- * pointers and key numbers.
- */
- for (bp = cur->bc_bufs[lev], block = XFS_BUF_TO_INOBT_BLOCK(bp);
- lev > level; ) {
- xfs_agblock_t agbno; /* block number of btree block */
- agbno = be32_to_cpu(*XFS_INOBT_PTR_ADDR(block, cur->bc_ptrs[lev], cur));
- if ((error = xfs_btree_read_bufs(cur->bc_mp, cur->bc_tp,
- cur->bc_private.a.agno, agbno, 0, &bp,
- XFS_INO_BTREE_REF)))
- return error;
- lev--;
- xfs_btree_setbuf(cur, lev, bp);
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
- if ((error = xfs_btree_check_sblock(cur, block, lev, bp)))
- return error;
- cur->bc_ptrs[lev] = 1;
- }
- *stat = 1;
- return 0;
-}
+#ifdef XFS_BTREE_TRACE
+ .trace_enter = xfs_inobt_trace_enter,
+ .trace_cursor = xfs_inobt_trace_cursor,
+ .trace_key = xfs_inobt_trace_key,
+ .trace_record = xfs_inobt_trace_record,
+#endif
+};
/*
- * Insert the current record at the point referenced by cur.
- * The cursor may be inconsistent on return if splits have been done.
+ * Allocate a new inode btree cursor.
*/
-int /* error */
-xfs_inobt_insert(
- xfs_btree_cur_t *cur, /* btree cursor */
- int *stat) /* success/failure */
+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 */
{
- int error; /* error return value */
- int i; /* result value, 0 for failure */
- int level; /* current level number in btree */
- xfs_agblock_t nbno; /* new block number (split result) */
- xfs_btree_cur_t *ncur; /* new cursor (split result) */
- xfs_inobt_rec_t nrec; /* record being inserted this level */
- xfs_btree_cur_t *pcur; /* previous level's cursor */
+ struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
+ struct xfs_btree_cur *cur;
- level = 0;
- nbno = NULLAGBLOCK;
- nrec.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino);
- nrec.ir_freecount = cpu_to_be32(cur->bc_rec.i.ir_freecount);
- nrec.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free);
- ncur = NULL;
- pcur = cur;
- /*
- * Loop going up the tree, starting at the leaf level.
- * Stop when we don't get a split block, that must mean that
- * the insert is finished with this level.
- */
- do {
- /*
- * Insert nrec/nbno into this level of the tree.
- * Note if we fail, nbno will be null.
- */
- if ((error = xfs_inobt_insrec(pcur, level++, &nbno, &nrec, &ncur,
- &i))) {
- if (pcur != cur)
- xfs_btree_del_cursor(pcur, XFS_BTREE_ERROR);
- return error;
- }
- /*
- * See if the cursor we just used is trash.
- * Can't trash the caller's cursor, but otherwise we should
- * if ncur is a new cursor or we're about to be done.
- */
- if (pcur != cur && (ncur || nbno == NULLAGBLOCK)) {
- cur->bc_nlevels = pcur->bc_nlevels;
- xfs_btree_del_cursor(pcur, XFS_BTREE_NOERROR);
- }
- /*
- * If we got a new cursor, switch to it.
- */
- if (ncur) {
- pcur = ncur;
- ncur = NULL;
- }
- } while (nbno != NULLAGBLOCK);
- *stat = i;
- return 0;
-}
+ cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
-/*
- * Lookup the record equal to ino in the btree given by cur.
- */
-int /* error */
-xfs_inobt_lookup_eq(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free, /* free inode mask */
- int *stat) /* success/failure */
-{
- cur->bc_rec.i.ir_startino = ino;
- cur->bc_rec.i.ir_freecount = fcnt;
- cur->bc_rec.i.ir_free = free;
- return xfs_inobt_lookup(cur, XFS_LOOKUP_EQ, stat);
-}
+ cur->bc_tp = tp;
+ cur->bc_mp = mp;
+ cur->bc_nlevels = be32_to_cpu(agi->agi_level);
+ cur->bc_btnum = XFS_BTNUM_INO;
+ cur->bc_blocklog = mp->m_sb.sb_blocklog;
-/*
- * Lookup the first record greater than or equal to ino
- * in the btree given by cur.
- */
-int /* error */
-xfs_inobt_lookup_ge(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free, /* free inode mask */
- int *stat) /* success/failure */
-{
- cur->bc_rec.i.ir_startino = ino;
- cur->bc_rec.i.ir_freecount = fcnt;
- cur->bc_rec.i.ir_free = free;
- return xfs_inobt_lookup(cur, XFS_LOOKUP_GE, stat);
-}
+ cur->bc_ops = &xfs_inobt_ops;
-/*
- * Lookup the first record less than or equal to ino
- * in the btree given by cur.
- */
-int /* error */
-xfs_inobt_lookup_le(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free, /* free inode mask */
- int *stat) /* success/failure */
-{
- cur->bc_rec.i.ir_startino = ino;
- cur->bc_rec.i.ir_freecount = fcnt;
- cur->bc_rec.i.ir_free = free;
- return xfs_inobt_lookup(cur, XFS_LOOKUP_LE, stat);
+ cur->bc_private.a.agbp = agbp;
+ cur->bc_private.a.agno = agno;
+
+ return cur;
}
/*
- * Update the record referred to by cur, to the value given
- * by [ino, fcnt, free].
- * This either works (return 0) or gets an EFSCORRUPTED error.
+ * Calculate number of records in an inobt btree block.
*/
-int /* error */
-xfs_inobt_update(
- xfs_btree_cur_t *cur, /* btree cursor */
- xfs_agino_t ino, /* starting inode of chunk */
- __int32_t fcnt, /* free inode count */
- xfs_inofree_t free) /* free inode mask */
+int
+xfs_inobt_maxrecs(
+ struct xfs_mount *mp,
+ int blocklen,
+ int leaf)
{
- xfs_inobt_block_t *block; /* btree block to update */
- xfs_buf_t *bp; /* buffer containing btree block */
- int error; /* error return value */
- int ptr; /* current record number (updating) */
- xfs_inobt_rec_t *rp; /* pointer to updated record */
+ blocklen -= XFS_INOBT_BLOCK_LEN(mp);
- /*
- * Pick up the current block.
- */
- bp = cur->bc_bufs[0];
- block = XFS_BUF_TO_INOBT_BLOCK(bp);
-#ifdef DEBUG
- if ((error = xfs_btree_check_sblock(cur, block, 0, bp)))
- return error;
-#endif
- /*
- * Get the address of the rec to be updated.
- */
- ptr = cur->bc_ptrs[0];
- rp = XFS_INOBT_REC_ADDR(block, ptr, cur);
- /*
- * Fill in the new contents and log them.
- */
- rp->ir_startino = cpu_to_be32(ino);
- rp->ir_freecount = cpu_to_be32(fcnt);
- rp->ir_free = cpu_to_be64(free);
- xfs_inobt_log_recs(cur, bp, ptr, ptr);
- /*
- * Updating first record in leaf. Pass new key value up to our parent.
- */
- if (ptr == 1) {
- xfs_inobt_key_t key; /* key containing [ino] */
-
- key.ir_startino = cpu_to_be32(ino);
- if ((error = xfs_inobt_updkey(cur, &key, 1)))
- return error;
- }
- return 0;
+ if (leaf)
+ return blocklen / sizeof(xfs_inobt_rec_t);
+ return blocklen / (sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t));
}