57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
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From 4469ed43b26b6e7d5ad5cfea45e99708e39de4a6 Mon Sep 17 00:00:00 2001
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From: David Marcin <djmarcin@google.com>
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Date: Wed, 16 Nov 2011 12:18:08 -0800
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Subject: [PATCH 169/170] btrfs-progs: Check metadata mirrors in find-root.
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Signed-off-by: David Marcin <djmarcin@google.com>
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---
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btrfs-find-root.c | 13 ++++++++++++-
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1 file changed, 12 insertions(+), 1 deletion(-)
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diff --git a/btrfs-find-root.c b/btrfs-find-root.c
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index 7f7b64f..ffbdde1 100644
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--- a/btrfs-find-root.c
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+++ b/btrfs-find-root.c
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@@ -236,6 +236,8 @@ static int find_root(struct btrfs_root *root)
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while (1) {
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u64 map_length = 4096;
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u64 type;
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+ int mirror_num;
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+ int num_copies;
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if (offset >
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btrfs_super_total_bytes(root->fs_info->super_copy)) {
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@@ -257,9 +259,11 @@ static int find_root(struct btrfs_root *root)
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printf("Checking metadata chunk %Lu, size %Lu"
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"\n", metadata_offset, metadata_size);
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}
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+ mirror_num = 1;
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+ again:
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err = __btrfs_map_block(&root->fs_info->mapping_tree, READ,
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offset, &map_length, &type,
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- &multi, 0, NULL);
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+ &multi, mirror_num, NULL);
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if (err) {
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offset += map_length;
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continue;
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@@ -278,9 +282,16 @@ static int find_root(struct btrfs_root *root)
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err = read_physical(root, fd, offset, bytenr, map_length);
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if (!err) {
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+ /* Found the root. */
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ret = 0;
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break;
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} else if (err < 0) {
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+ num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
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+ offset, map_length);
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+ mirror_num++;
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+ if (mirror_num <= num_copies)
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+ goto again;
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+ /* Unrecoverable error in read. */
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ret = err;
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break;
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}
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--
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1.8.3.1
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