Before this patchset, if we want to use backup roots, it's only possible
to let btrfs-check to automatically choose the backup.
If user want to use a specified backup, it can only use -r|--tree-root
option along with backup roots dump from "btrfs ins dump-super".
This patchset will introduce optional argument for -b|--backup, so user
can specify which backup to use by providing the generation difference
(-3, -2, -1).
If the optional argument is not provided, the default value is -1, and
the behavior should be pretty much the same.
Qu Wenruo (3):
btrfs-progs: utils-lib: Use error() to replace fprintf(stderr, "ERROR:
")
btrfs-progs: disk-io: Handle backup root more correctly
btrfs-progs: check: Introduce optional argument for -b|--backup
Documentation/btrfs-check.asciidoc | 6 ++--
check/main.c | 33 +++++++++++++++---
common/utils.h | 1 +
ctree.h | 8 +++++
disk-io.c | 55 ++++++++++++++++++++++++------
disk-io.h | 33 +++++++++++-------
utils-lib.c | 25 +++++++++++---
7 files changed, 127 insertions(+), 34 deletions(-)
--
2.23.0
