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Diffstat (limited to 'fs/xfs/xfs_dir2_node.c')
-rw-r--r--fs/xfs/xfs_dir2_node.c402
1 files changed, 239 insertions, 163 deletions
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index 8dade711f099..fa6c3a5ddbc6 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -226,7 +226,7 @@ xfs_dir2_leafn_add(
226 ASSERT(index == be16_to_cpu(leaf->hdr.count) || 226 ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
227 be32_to_cpu(leaf->ents[index].hashval) >= args->hashval); 227 be32_to_cpu(leaf->ents[index].hashval) >= args->hashval);
228 228
229 if (args->justcheck) 229 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
230 return 0; 230 return 0;
231 231
232 /* 232 /*
@@ -387,28 +387,26 @@ xfs_dir2_leafn_lasthash(
387} 387}
388 388
389/* 389/*
390 * Look up a leaf entry in a node-format leaf block. 390 * Look up a leaf entry for space to add a name in a node-format leaf block.
391 * If this is an addname then the extrablk in state is a freespace block, 391 * The extrablk in state is a freespace block.
392 * otherwise it's a data block.
393 */ 392 */
394int 393STATIC int
395xfs_dir2_leafn_lookup_int( 394xfs_dir2_leafn_lookup_for_addname(
396 xfs_dabuf_t *bp, /* leaf buffer */ 395 xfs_dabuf_t *bp, /* leaf buffer */
397 xfs_da_args_t *args, /* operation arguments */ 396 xfs_da_args_t *args, /* operation arguments */
398 int *indexp, /* out: leaf entry index */ 397 int *indexp, /* out: leaf entry index */
399 xfs_da_state_t *state) /* state to fill in */ 398 xfs_da_state_t *state) /* state to fill in */
400{ 399{
401 xfs_dabuf_t *curbp; /* current data/free buffer */ 400 xfs_dabuf_t *curbp = NULL; /* current data/free buffer */
402 xfs_dir2_db_t curdb; /* current data block number */ 401 xfs_dir2_db_t curdb = -1; /* current data block number */
403 xfs_dir2_db_t curfdb; /* current free block number */ 402 xfs_dir2_db_t curfdb = -1; /* current free block number */
404 xfs_dir2_data_entry_t *dep; /* data block entry */
405 xfs_inode_t *dp; /* incore directory inode */ 403 xfs_inode_t *dp; /* incore directory inode */
406 int error; /* error return value */ 404 int error; /* error return value */
407 int fi; /* free entry index */ 405 int fi; /* free entry index */
408 xfs_dir2_free_t *free=NULL; /* free block structure */ 406 xfs_dir2_free_t *free = NULL; /* free block structure */
409 int index; /* leaf entry index */ 407 int index; /* leaf entry index */
410 xfs_dir2_leaf_t *leaf; /* leaf structure */ 408 xfs_dir2_leaf_t *leaf; /* leaf structure */
411 int length=0; /* length of new data entry */ 409 int length; /* length of new data entry */
412 xfs_dir2_leaf_entry_t *lep; /* leaf entry */ 410 xfs_dir2_leaf_entry_t *lep; /* leaf entry */
413 xfs_mount_t *mp; /* filesystem mount point */ 411 xfs_mount_t *mp; /* filesystem mount point */
414 xfs_dir2_db_t newdb; /* new data block number */ 412 xfs_dir2_db_t newdb; /* new data block number */
@@ -431,33 +429,20 @@ xfs_dir2_leafn_lookup_int(
431 /* 429 /*
432 * Do we have a buffer coming in? 430 * Do we have a buffer coming in?
433 */ 431 */
434 if (state->extravalid) 432 if (state->extravalid) {
433 /* If so, it's a free block buffer, get the block number. */
435 curbp = state->extrablk.bp; 434 curbp = state->extrablk.bp;
436 else 435 curfdb = state->extrablk.blkno;
437 curbp = NULL; 436 free = curbp->data;
438 /* 437 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
439 * For addname, it's a free block buffer, get the block number.
440 */
441 if (args->addname) {
442 curfdb = curbp ? state->extrablk.blkno : -1;
443 curdb = -1;
444 length = xfs_dir2_data_entsize(args->namelen);
445 if ((free = (curbp ? curbp->data : NULL)))
446 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
447 }
448 /*
449 * For others, it's a data block buffer, get the block number.
450 */
451 else {
452 curfdb = -1;
453 curdb = curbp ? state->extrablk.blkno : -1;
454 } 438 }
439 length = xfs_dir2_data_entsize(args->namelen);
455 /* 440 /*
456 * Loop over leaf entries with the right hash value. 441 * Loop over leaf entries with the right hash value.
457 */ 442 */
458 for (lep = &leaf->ents[index]; 443 for (lep = &leaf->ents[index]; index < be16_to_cpu(leaf->hdr.count) &&
459 index < be16_to_cpu(leaf->hdr.count) && be32_to_cpu(lep->hashval) == args->hashval; 444 be32_to_cpu(lep->hashval) == args->hashval;
460 lep++, index++) { 445 lep++, index++) {
461 /* 446 /*
462 * Skip stale leaf entries. 447 * Skip stale leaf entries.
463 */ 448 */
@@ -471,161 +456,244 @@ xfs_dir2_leafn_lookup_int(
471 * For addname, we're looking for a place to put the new entry. 456 * For addname, we're looking for a place to put the new entry.
472 * We want to use a data block with an entry of equal 457 * We want to use a data block with an entry of equal
473 * hash value to ours if there is one with room. 458 * hash value to ours if there is one with room.
459 *
460 * If this block isn't the data block we already have
461 * in hand, take a look at it.
474 */ 462 */
475 if (args->addname) { 463 if (newdb != curdb) {
464 curdb = newdb;
476 /* 465 /*
477 * If this block isn't the data block we already have 466 * Convert the data block to the free block
478 * in hand, take a look at it. 467 * holding its freespace information.
479 */ 468 */
480 if (newdb != curdb) { 469 newfdb = xfs_dir2_db_to_fdb(mp, newdb);
481 curdb = newdb;
482 /*
483 * Convert the data block to the free block
484 * holding its freespace information.
485 */
486 newfdb = xfs_dir2_db_to_fdb(mp, newdb);
487 /*
488 * If it's not the one we have in hand,
489 * read it in.
490 */
491 if (newfdb != curfdb) {
492 /*
493 * If we had one before, drop it.
494 */
495 if (curbp)
496 xfs_da_brelse(tp, curbp);
497 /*
498 * Read the free block.
499 */
500 if ((error = xfs_da_read_buf(tp, dp,
501 xfs_dir2_db_to_da(mp,
502 newfdb),
503 -1, &curbp,
504 XFS_DATA_FORK))) {
505 return error;
506 }
507 free = curbp->data;
508 ASSERT(be32_to_cpu(free->hdr.magic) ==
509 XFS_DIR2_FREE_MAGIC);
510 ASSERT((be32_to_cpu(free->hdr.firstdb) %
511 XFS_DIR2_MAX_FREE_BESTS(mp)) ==
512 0);
513 ASSERT(be32_to_cpu(free->hdr.firstdb) <= curdb);
514 ASSERT(curdb <
515 be32_to_cpu(free->hdr.firstdb) +
516 be32_to_cpu(free->hdr.nvalid));
517 }
518 /*
519 * Get the index for our entry.
520 */
521 fi = xfs_dir2_db_to_fdindex(mp, curdb);
522 /*
523 * If it has room, return it.
524 */
525 if (unlikely(be16_to_cpu(free->bests[fi]) == NULLDATAOFF)) {
526 XFS_ERROR_REPORT("xfs_dir2_leafn_lookup_int",
527 XFS_ERRLEVEL_LOW, mp);
528 if (curfdb != newfdb)
529 xfs_da_brelse(tp, curbp);
530 return XFS_ERROR(EFSCORRUPTED);
531 }
532 curfdb = newfdb;
533 if (be16_to_cpu(free->bests[fi]) >= length) {
534 *indexp = index;
535 state->extravalid = 1;
536 state->extrablk.bp = curbp;
537 state->extrablk.blkno = curfdb;
538 state->extrablk.index = fi;
539 state->extrablk.magic =
540 XFS_DIR2_FREE_MAGIC;
541 ASSERT(args->oknoent);
542 return XFS_ERROR(ENOENT);
543 }
544 }
545 }
546 /*
547 * Not adding a new entry, so we really want to find
548 * the name given to us.
549 */
550 else {
551 /* 470 /*
552 * If it's a different data block, go get it. 471 * If it's not the one we have in hand, read it in.
553 */ 472 */
554 if (newdb != curdb) { 473 if (newfdb != curfdb) {
555 /* 474 /*
556 * If we had a block before, drop it. 475 * If we had one before, drop it.
557 */ 476 */
558 if (curbp) 477 if (curbp)
559 xfs_da_brelse(tp, curbp); 478 xfs_da_brelse(tp, curbp);
560 /* 479 /*
561 * Read the data block. 480 * Read the free block.
562 */ 481 */
563 if ((error = 482 error = xfs_da_read_buf(tp, dp,
564 xfs_da_read_buf(tp, dp, 483 xfs_dir2_db_to_da(mp, newfdb),
565 xfs_dir2_db_to_da(mp, newdb), -1, 484 -1, &curbp, XFS_DATA_FORK);
566 &curbp, XFS_DATA_FORK))) { 485 if (error)
567 return error; 486 return error;
568 } 487 free = curbp->data;
569 xfs_dir2_data_check(dp, curbp); 488 ASSERT(be32_to_cpu(free->hdr.magic) ==
570 curdb = newdb; 489 XFS_DIR2_FREE_MAGIC);
490 ASSERT((be32_to_cpu(free->hdr.firstdb) %
491 XFS_DIR2_MAX_FREE_BESTS(mp)) == 0);
492 ASSERT(be32_to_cpu(free->hdr.firstdb) <= curdb);
493 ASSERT(curdb < be32_to_cpu(free->hdr.firstdb) +
494 be32_to_cpu(free->hdr.nvalid));
571 } 495 }
572 /* 496 /*
573 * Point to the data entry. 497 * Get the index for our entry.
574 */ 498 */
575 dep = (xfs_dir2_data_entry_t *) 499 fi = xfs_dir2_db_to_fdindex(mp, curdb);
576 ((char *)curbp->data +
577 xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address)));
578 /* 500 /*
579 * Compare the entry, return it if it matches. 501 * If it has room, return it.
580 */ 502 */
581 if (dep->namelen == args->namelen && 503 if (unlikely(be16_to_cpu(free->bests[fi]) == NULLDATAOFF)) {
582 dep->name[0] == args->name[0] && 504 XFS_ERROR_REPORT("xfs_dir2_leafn_lookup_int",
583 memcmp(dep->name, args->name, args->namelen) == 0) { 505 XFS_ERRLEVEL_LOW, mp);
584 args->inumber = be64_to_cpu(dep->inumber); 506 if (curfdb != newfdb)
585 *indexp = index; 507 xfs_da_brelse(tp, curbp);
586 state->extravalid = 1; 508 return XFS_ERROR(EFSCORRUPTED);
587 state->extrablk.bp = curbp;
588 state->extrablk.blkno = curdb;
589 state->extrablk.index =
590 (int)((char *)dep -
591 (char *)curbp->data);
592 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
593 return XFS_ERROR(EEXIST);
594 } 509 }
510 curfdb = newfdb;
511 if (be16_to_cpu(free->bests[fi]) >= length)
512 goto out;
595 } 513 }
596 } 514 }
515 /* Didn't find any space */
516 fi = -1;
517out:
518 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
519 if (curbp) {
520 /* Giving back a free block. */
521 state->extravalid = 1;
522 state->extrablk.bp = curbp;
523 state->extrablk.index = fi;
524 state->extrablk.blkno = curfdb;
525 state->extrablk.magic = XFS_DIR2_FREE_MAGIC;
526 } else {
527 state->extravalid = 0;
528 }
597 /* 529 /*
598 * Didn't find a match. 530 * Return the index, that will be the insertion point.
599 * If we are holding a buffer, give it back in case our caller
600 * finds it useful.
601 */ 531 */
602 if ((state->extravalid = (curbp != NULL))) { 532 *indexp = index;
603 state->extrablk.bp = curbp; 533 return XFS_ERROR(ENOENT);
604 state->extrablk.index = -1; 534}
535
536/*
537 * Look up a leaf entry in a node-format leaf block.
538 * The extrablk in state a data block.
539 */
540STATIC int
541xfs_dir2_leafn_lookup_for_entry(
542 xfs_dabuf_t *bp, /* leaf buffer */
543 xfs_da_args_t *args, /* operation arguments */
544 int *indexp, /* out: leaf entry index */
545 xfs_da_state_t *state) /* state to fill in */
546{
547 xfs_dabuf_t *curbp = NULL; /* current data/free buffer */
548 xfs_dir2_db_t curdb = -1; /* current data block number */
549 xfs_dir2_data_entry_t *dep; /* data block entry */
550 xfs_inode_t *dp; /* incore directory inode */
551 int error; /* error return value */
552 int index; /* leaf entry index */
553 xfs_dir2_leaf_t *leaf; /* leaf structure */
554 xfs_dir2_leaf_entry_t *lep; /* leaf entry */
555 xfs_mount_t *mp; /* filesystem mount point */
556 xfs_dir2_db_t newdb; /* new data block number */
557 xfs_trans_t *tp; /* transaction pointer */
558 enum xfs_dacmp cmp; /* comparison result */
559
560 dp = args->dp;
561 tp = args->trans;
562 mp = dp->i_mount;
563 leaf = bp->data;
564 ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
565#ifdef __KERNEL__
566 ASSERT(be16_to_cpu(leaf->hdr.count) > 0);
567#endif
568 xfs_dir2_leafn_check(dp, bp);
569 /*
570 * Look up the hash value in the leaf entries.
571 */
572 index = xfs_dir2_leaf_search_hash(args, bp);
573 /*
574 * Do we have a buffer coming in?
575 */
576 if (state->extravalid) {
577 curbp = state->extrablk.bp;
578 curdb = state->extrablk.blkno;
579 }
580 /*
581 * Loop over leaf entries with the right hash value.
582 */
583 for (lep = &leaf->ents[index]; index < be16_to_cpu(leaf->hdr.count) &&
584 be32_to_cpu(lep->hashval) == args->hashval;
585 lep++, index++) {
605 /* 586 /*
606 * For addname, giving back a free block. 587 * Skip stale leaf entries.
607 */ 588 */
608 if (args->addname) { 589 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
609 state->extrablk.blkno = curfdb; 590 continue;
610 state->extrablk.magic = XFS_DIR2_FREE_MAGIC; 591 /*
592 * Pull the data block number from the entry.
593 */
594 newdb = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
595 /*
596 * Not adding a new entry, so we really want to find
597 * the name given to us.
598 *
599 * If it's a different data block, go get it.
600 */
601 if (newdb != curdb) {
602 /*
603 * If we had a block before that we aren't saving
604 * for a CI name, drop it
605 */
606 if (curbp && (args->cmpresult == XFS_CMP_DIFFERENT ||
607 curdb != state->extrablk.blkno))
608 xfs_da_brelse(tp, curbp);
609 /*
610 * If needing the block that is saved with a CI match,
611 * use it otherwise read in the new data block.
612 */
613 if (args->cmpresult != XFS_CMP_DIFFERENT &&
614 newdb == state->extrablk.blkno) {
615 ASSERT(state->extravalid);
616 curbp = state->extrablk.bp;
617 } else {
618 error = xfs_da_read_buf(tp, dp,
619 xfs_dir2_db_to_da(mp, newdb),
620 -1, &curbp, XFS_DATA_FORK);
621 if (error)
622 return error;
623 }
624 xfs_dir2_data_check(dp, curbp);
625 curdb = newdb;
611 } 626 }
612 /* 627 /*
613 * For other callers, giving back a data block. 628 * Point to the data entry.
614 */ 629 */
615 else { 630 dep = (xfs_dir2_data_entry_t *)((char *)curbp->data +
631 xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address)));
632 /*
633 * Compare the entry and if it's an exact match, return
634 * EEXIST immediately. If it's the first case-insensitive
635 * match, store the block & inode number and continue looking.
636 */
637 cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen);
638 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
639 /* If there is a CI match block, drop it */
640 if (args->cmpresult != XFS_CMP_DIFFERENT &&
641 curdb != state->extrablk.blkno)
642 xfs_da_brelse(tp, state->extrablk.bp);
643 args->cmpresult = cmp;
644 args->inumber = be64_to_cpu(dep->inumber);
645 *indexp = index;
646 state->extravalid = 1;
647 state->extrablk.bp = curbp;
616 state->extrablk.blkno = curdb; 648 state->extrablk.blkno = curdb;
649 state->extrablk.index = (int)((char *)dep -
650 (char *)curbp->data);
617 state->extrablk.magic = XFS_DIR2_DATA_MAGIC; 651 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
652 if (cmp == XFS_CMP_EXACT)
653 return XFS_ERROR(EEXIST);
618 } 654 }
619 } 655 }
620 /* 656 ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
621 * Return the final index, that will be the insertion point. 657 (args->op_flags & XFS_DA_OP_OKNOENT));
622 */ 658 if (curbp) {
659 if (args->cmpresult == XFS_CMP_DIFFERENT) {
660 /* Giving back last used data block. */
661 state->extravalid = 1;
662 state->extrablk.bp = curbp;
663 state->extrablk.index = -1;
664 state->extrablk.blkno = curdb;
665 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
666 } else {
667 /* If the curbp is not the CI match block, drop it */
668 if (state->extrablk.bp != curbp)
669 xfs_da_brelse(tp, curbp);
670 }
671 } else {
672 state->extravalid = 0;
673 }
623 *indexp = index; 674 *indexp = index;
624 ASSERT(index == be16_to_cpu(leaf->hdr.count) || args->oknoent);
625 return XFS_ERROR(ENOENT); 675 return XFS_ERROR(ENOENT);
626} 676}
627 677
628/* 678/*
679 * Look up a leaf entry in a node-format leaf block.
680 * If this is an addname then the extrablk in state is a freespace block,
681 * otherwise it's a data block.
682 */
683int
684xfs_dir2_leafn_lookup_int(
685 xfs_dabuf_t *bp, /* leaf buffer */
686 xfs_da_args_t *args, /* operation arguments */
687 int *indexp, /* out: leaf entry index */
688 xfs_da_state_t *state) /* state to fill in */
689{
690 if (args->op_flags & XFS_DA_OP_ADDNAME)
691 return xfs_dir2_leafn_lookup_for_addname(bp, args, indexp,
692 state);
693 return xfs_dir2_leafn_lookup_for_entry(bp, args, indexp, state);
694}
695
696/*
629 * Move count leaf entries from source to destination leaf. 697 * Move count leaf entries from source to destination leaf.
630 * Log entries and headers. Stale entries are preserved. 698 * Log entries and headers. Stale entries are preserved.
631 */ 699 */
@@ -823,9 +891,10 @@ xfs_dir2_leafn_rebalance(
823 */ 891 */
824 if (!state->inleaf) 892 if (!state->inleaf)
825 blk2->index = blk1->index - be16_to_cpu(leaf1->hdr.count); 893 blk2->index = blk1->index - be16_to_cpu(leaf1->hdr.count);
826 894
827 /* 895 /*
828 * Finally sanity check just to make sure we are not returning a negative index 896 * Finally sanity check just to make sure we are not returning a
897 * negative index
829 */ 898 */
830 if(blk2->index < 0) { 899 if(blk2->index < 0) {
831 state->inleaf = 1; 900 state->inleaf = 1;
@@ -1332,7 +1401,7 @@ xfs_dir2_node_addname(
1332 /* 1401 /*
1333 * It worked, fix the hash values up the btree. 1402 * It worked, fix the hash values up the btree.
1334 */ 1403 */
1335 if (!args->justcheck) 1404 if (!(args->op_flags & XFS_DA_OP_JUSTCHECK))
1336 xfs_da_fixhashpath(state, &state->path); 1405 xfs_da_fixhashpath(state, &state->path);
1337 } else { 1406 } else {
1338 /* 1407 /*
@@ -1515,7 +1584,8 @@ xfs_dir2_node_addname_int(
1515 /* 1584 /*
1516 * Not allowed to allocate, return failure. 1585 * Not allowed to allocate, return failure.
1517 */ 1586 */
1518 if (args->justcheck || args->total == 0) { 1587 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) ||
1588 args->total == 0) {
1519 /* 1589 /*
1520 * Drop the freespace buffer unless it came from our 1590 * Drop the freespace buffer unless it came from our
1521 * caller. 1591 * caller.
@@ -1661,7 +1731,7 @@ xfs_dir2_node_addname_int(
1661 /* 1731 /*
1662 * If just checking, we succeeded. 1732 * If just checking, we succeeded.
1663 */ 1733 */
1664 if (args->justcheck) { 1734 if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
1665 if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL) 1735 if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
1666 xfs_da_buf_done(fbp); 1736 xfs_da_buf_done(fbp);
1667 return 0; 1737 return 0;
@@ -1767,6 +1837,14 @@ xfs_dir2_node_lookup(
1767 error = xfs_da_node_lookup_int(state, &rval); 1837 error = xfs_da_node_lookup_int(state, &rval);
1768 if (error) 1838 if (error)
1769 rval = error; 1839 rval = error;
1840 else if (rval == ENOENT && args->cmpresult == XFS_CMP_CASE) {
1841 /* If a CI match, dup the actual name and return EEXIST */
1842 xfs_dir2_data_entry_t *dep;
1843
1844 dep = (xfs_dir2_data_entry_t *)((char *)state->extrablk.bp->
1845 data + state->extrablk.index);
1846 rval = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
1847 }
1770 /* 1848 /*
1771 * Release the btree blocks and leaf block. 1849 * Release the btree blocks and leaf block.
1772 */ 1850 */
@@ -1810,9 +1888,8 @@ xfs_dir2_node_removename(
1810 * Look up the entry we're deleting, set up the cursor. 1888 * Look up the entry we're deleting, set up the cursor.
1811 */ 1889 */
1812 error = xfs_da_node_lookup_int(state, &rval); 1890 error = xfs_da_node_lookup_int(state, &rval);
1813 if (error) { 1891 if (error)
1814 rval = error; 1892 rval = error;
1815 }
1816 /* 1893 /*
1817 * Didn't find it, upper layer screwed up. 1894 * Didn't find it, upper layer screwed up.
1818 */ 1895 */
@@ -1829,9 +1906,8 @@ xfs_dir2_node_removename(
1829 */ 1906 */
1830 error = xfs_dir2_leafn_remove(args, blk->bp, blk->index, 1907 error = xfs_dir2_leafn_remove(args, blk->bp, blk->index,
1831 &state->extrablk, &rval); 1908 &state->extrablk, &rval);
1832 if (error) { 1909 if (error)
1833 return error; 1910 return error;
1834 }
1835 /* 1911 /*
1836 * Fix the hash values up the btree. 1912 * Fix the hash values up the btree.
1837 */ 1913 */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-03 09:10:02 -0400