transaction.c (d26fad5b38e1c4667d4f2604936e59c837caa54d) transaction.c (743162013d40ca612b4cb53d3a200dff2d9ab26e)
1/*
2 * linux/fs/jbd2/transaction.c
3 *
4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1998
5 *
6 * Copyright 1998 Red Hat corp --- All Rights Reserved
7 *
8 * This file is part of the Linux kernel and is made available under

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758
759 printk(KERN_WARNING
760 "JBD2: Spotted dirty metadata buffer (dev = %s, blocknr = %llu). "
761 "There's a risk of filesystem corruption in case of system "
762 "crash.\n",
763 bdevname(bh->b_bdev, b), (unsigned long long)bh->b_blocknr);
764}
765
1/*
2 * linux/fs/jbd2/transaction.c
3 *
4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1998
5 *
6 * Copyright 1998 Red Hat corp --- All Rights Reserved
7 *
8 * This file is part of the Linux kernel and is made available under

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758
759 printk(KERN_WARNING
760 "JBD2: Spotted dirty metadata buffer (dev = %s, blocknr = %llu). "
761 "There's a risk of filesystem corruption in case of system "
762 "crash.\n",
763 bdevname(bh->b_bdev, b), (unsigned long long)bh->b_blocknr);
764}
765
766static int sleep_on_shadow_bh(void *word)
767{
768 io_schedule();
769 return 0;
770}
771
772/*
773 * If the buffer is already part of the current transaction, then there
774 * is nothing we need to do. If it is already part of a prior
775 * transaction which we are still committing to disk, then we need to
776 * make sure that we do not overwrite the old copy: we do copy-out to
777 * preserve the copy going to disk. We also account the buffer against
778 * the handle's metadata buffer credits (unless the buffer is already
779 * part of the transaction, that is).

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901 * right now. The essence of copy-out is that it is the
902 * extra copy, not the primary copy, which gets
903 * journaled. If the primary copy is already going to
904 * disk then we cannot do copy-out here. */
905
906 if (buffer_shadow(bh)) {
907 JBUFFER_TRACE(jh, "on shadow: sleep");
908 jbd_unlock_bh_state(bh);
766/*
767 * If the buffer is already part of the current transaction, then there
768 * is nothing we need to do. If it is already part of a prior
769 * transaction which we are still committing to disk, then we need to
770 * make sure that we do not overwrite the old copy: we do copy-out to
771 * preserve the copy going to disk. We also account the buffer against
772 * the handle's metadata buffer credits (unless the buffer is already
773 * part of the transaction, that is).

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895 * right now. The essence of copy-out is that it is the
896 * extra copy, not the primary copy, which gets
897 * journaled. If the primary copy is already going to
898 * disk then we cannot do copy-out here. */
899
900 if (buffer_shadow(bh)) {
901 JBUFFER_TRACE(jh, "on shadow: sleep");
902 jbd_unlock_bh_state(bh);
909 wait_on_bit(&bh->b_state, BH_Shadow,
910 sleep_on_shadow_bh, TASK_UNINTERRUPTIBLE);
903 wait_on_bit_io(&bh->b_state, BH_Shadow,
904 TASK_UNINTERRUPTIBLE);
911 goto repeat;
912 }
913
914 /*
915 * Only do the copy if the currently-owning transaction still
916 * needs it. If buffer isn't on BJ_Metadata list, the
917 * committing transaction is past that stage (here we use the
918 * fact that BH_Shadow is set under bh_state lock together with

--- 1568 unchanged lines hidden --- 		905 goto repeat;
906 }
907
908 /*
909 * Only do the copy if the currently-owning transaction still
910 * needs it. If buffer isn't on BJ_Metadata list, the
911 * committing transaction is past that stage (here we use the
912 * fact that BH_Shadow is set under bh_state lock together with

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