| Message ID | 1411678015-5928-1-git-send-email-jbacik@fb.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
> --- a/btrfs-image.c > +++ b/btrfs-image.c > @@ -1020,6 +1020,9 @@ static int copy_tree_blocks(struct btrfs_root *root, struct extent_buffer *eb, > int i = 0; > int ret; > > + if (btrfs_header_bytenr(eb) == 65536) > + printf("We have bytenr 65536, belongs to %llu, level %d\n", > + btrfs_header_owner(eb), btrfs_header_level(eb)); > ret = add_extent(btrfs_header_bytenr(eb), root->leafsize, metadump, 0); > if (ret) { > fprintf(stderr, "Error adding metadata block\n"); Did you mean to leave that in? The raw super offset sure makes it look like debugging output. - z -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 09/25/2014 05:44 PM, Zach Brown wrote: >> --- a/btrfs-image.c >> +++ b/btrfs-image.c >> @@ -1020,6 +1020,9 @@ static int copy_tree_blocks(struct btrfs_root *root, struct extent_buffer *eb, >> int i = 0; >> int ret; >> >> + if (btrfs_header_bytenr(eb) == 65536) >> + printf("We have bytenr 65536, belongs to %llu, level %d\n", >> + btrfs_header_owner(eb), btrfs_header_level(eb)); >> ret = add_extent(btrfs_header_bytenr(eb), root->leafsize, metadump, 0); >> if (ret) { >> fprintf(stderr, "Error adding metadata block\n"); > > Did you mean to leave that in? The raw super offset sure makes it look > like debugging output. > Sigh sorry, thought I culled everything. Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/btrfs-image.c b/btrfs-image.c index cb17f16..6643ad1 100644 --- a/btrfs-image.c +++ b/btrfs-image.c @@ -1020,6 +1020,9 @@ static int copy_tree_blocks(struct btrfs_root *root, struct extent_buffer *eb, int i = 0; int ret; + if (btrfs_header_bytenr(eb) == 65536) + printf("We have bytenr 65536, belongs to %llu, level %d\n", + btrfs_header_owner(eb), btrfs_header_level(eb)); ret = add_extent(btrfs_header_bytenr(eb), root->leafsize, metadump, 0); if (ret) { fprintf(stderr, "Error adding metadata block\n"); @@ -1279,7 +1282,7 @@ static int create_metadump(const char *input, FILE *out, int num_threads, } ret = add_extent(BTRFS_SUPER_INFO_OFFSET, BTRFS_SUPER_INFO_SIZE, - &metadump, 0); + &metadump, 1); if (ret) { fprintf(stderr, "Error adding metadata %d\n", ret); err = ret; diff --git a/disk-io.c b/disk-io.c index 26a532e..34c0a97 100644 --- a/disk-io.c +++ b/disk-io.c @@ -201,7 +201,8 @@ int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirr read_len = bytes_left; device = NULL; - if (!info->on_restoring) { + if (!info->on_restoring && + eb->start != BTRFS_SUPER_INFO_OFFSET) { ret = btrfs_map_block(&info->mapping_tree, READ, eb->start + offset, &read_len, &multi, mirror, NULL);
We use the read extent buffer infrastructure to read the super block when we are creating a btrfs-image. This works out fine most of the time except when the fs has been balanced, then it fails to map the super block. So we could fix btrfs-image to read in the super in a special way, but thats more code. So instead just check in the eb reading code if we are reading the super and then don't bother mapping the block, just read the actual offset. This fixed some poor guy who was trying to btrfs-image his fs that had been balanced. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> --- btrfs-image.c | 5 ++++- disk-io.c | 3 ++- 2 files changed, 6 insertions(+), 2 deletions(-)