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Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c143
1 files changed, 3 insertions, 140 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 4f5e442d60d8..fb15d3b1f409 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -519,139 +519,6 @@ out:
519 return inode ? inode : ERR_PTR(error); 519 return inode ? inode : ERR_PTR(error);
520} 520}
521 521
522static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
523{
524 const struct gfs2_inum_range *str = buf;
525
526 ir->ir_start = be64_to_cpu(str->ir_start);
527 ir->ir_length = be64_to_cpu(str->ir_length);
528}
529
530static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
531{
532 struct gfs2_inum_range *str = buf;
533
534 str->ir_start = cpu_to_be64(ir->ir_start);
535 str->ir_length = cpu_to_be64(ir->ir_length);
536}
537
538static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
539{
540 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
541 struct buffer_head *bh;
542 struct gfs2_inum_range_host ir;
543 int error;
544
545 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
546 if (error)
547 return error;
548 mutex_lock(&sdp->sd_inum_mutex);
549
550 error = gfs2_meta_inode_buffer(ip, &bh);
551 if (error) {
552 mutex_unlock(&sdp->sd_inum_mutex);
553 gfs2_trans_end(sdp);
554 return error;
555 }
556
557 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
558
559 if (ir.ir_length) {
560 *formal_ino = ir.ir_start++;
561 ir.ir_length--;
562 gfs2_trans_add_bh(ip->i_gl, bh, 1);
563 gfs2_inum_range_out(&ir,
564 bh->b_data + sizeof(struct gfs2_dinode));
565 brelse(bh);
566 mutex_unlock(&sdp->sd_inum_mutex);
567 gfs2_trans_end(sdp);
568 return 0;
569 }
570
571 brelse(bh);
572
573 mutex_unlock(&sdp->sd_inum_mutex);
574 gfs2_trans_end(sdp);
575
576 return 1;
577}
578
579static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino)
580{
581 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
582 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
583 struct gfs2_holder gh;
584 struct buffer_head *bh;
585 struct gfs2_inum_range_host ir;
586 int error;
587
588 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
589 if (error)
590 return error;
591
592 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
593 if (error)
594 goto out;
595 mutex_lock(&sdp->sd_inum_mutex);
596
597 error = gfs2_meta_inode_buffer(ip, &bh);
598 if (error)
599 goto out_end_trans;
600
601 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
602
603 if (!ir.ir_length) {
604 struct buffer_head *m_bh;
605 u64 x, y;
606 __be64 z;
607
608 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
609 if (error)
610 goto out_brelse;
611
612 z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode));
613 x = y = be64_to_cpu(z);
614 ir.ir_start = x;
615 ir.ir_length = GFS2_INUM_QUANTUM;
616 x += GFS2_INUM_QUANTUM;
617 if (x < y)
618 gfs2_consist_inode(m_ip);
619 z = cpu_to_be64(x);
620 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
621 *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z;
622
623 brelse(m_bh);
624 }
625
626 *formal_ino = ir.ir_start++;
627 ir.ir_length--;
628
629 gfs2_trans_add_bh(ip->i_gl, bh, 1);
630 gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
631
632out_brelse:
633 brelse(bh);
634out_end_trans:
635 mutex_unlock(&sdp->sd_inum_mutex);
636 gfs2_trans_end(sdp);
637out:
638 gfs2_glock_dq_uninit(&gh);
639 return error;
640}
641
642static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum)
643{
644 int error;
645
646 error = pick_formal_ino_1(sdp, inum);
647 if (error <= 0)
648 return error;
649
650 error = pick_formal_ino_2(sdp, inum);
651
652 return error;
653}
654
655/** 522/**
656 * create_ok - OK to create a new on-disk inode here? 523 * create_ok - OK to create a new on-disk inode here?
657 * @dip: Directory in which dinode is to be created 524 * @dip: Directory in which dinode is to be created
@@ -981,13 +848,10 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
981 if (error) 848 if (error)
982 goto fail_gunlock; 849 goto fail_gunlock;
983 850
984 error = pick_formal_ino(sdp, &inum.no_formal_ino);
985 if (error)
986 goto fail_gunlock;
987
988 error = alloc_dinode(dip, &inum.no_addr, &generation); 851 error = alloc_dinode(dip, &inum.no_addr, &generation);
989 if (error) 852 if (error)
990 goto fail_gunlock; 853 goto fail_gunlock;
854 inum.no_formal_ino = generation;
991 855
992 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, 856 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
993 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 857 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
@@ -998,9 +862,8 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
998 if (error) 862 if (error)
999 goto fail_gunlock2; 863 goto fail_gunlock2;
1000 864
1001 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), 865 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
1002 inum.no_addr, 866 inum.no_formal_ino, 0);
1003 inum.no_formal_ino, 0);
1004 if (IS_ERR(inode)) 867 if (IS_ERR(inode))
1005 goto fail_gunlock2; 868 goto fail_gunlock2;
1006 869