[PATCH for-3.5 0/5] selinux_restorecon(3), setfiles(8): skip relabeling errors

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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1794518

The first three patches in the series are cleanups.

The fourth patch introduces a new feature (and API) to libselinux, and
the fifth patch exposes the feature through a new setfiles(8) command
line option.

In libguestfs, we invoke setfiles(8) on masses of directory trees (in a
large amount of virtual machines). We don't care if relabeling fails on
a few individual files, but we still want to catch fatal errors.
Currently these error conditions are impossible to tell apart, because
selinux_restorecon[_parallel()], even though it is capable of continuing
through relabeling errors, ultimately reports even the case of *only*
relabeling errors, with return value (-1). Setfiles(8) then has no
choice but to exit with status 255 in this case as well.

The fourth patch introduces a new selinux_restorecon[_parallel()] flag,
namely SELINUX_RESTORECON_COUNT_ERRORS, which counts, but otherwise
ignores, relabeling errors encountered during the file tree walk. In
case the function succeeds, the skipped error count can be fetched with
a new API, selinux_restorecon_get_skipped_errors(). This relies on
static library data, which is inspired by existent APIs such as
selinux_restorecon_set_sehandle(3) and
selinux_restorecon_set_exclude_list(3) -- those do the same (albeit
before calling selinux_restorecon[_parallel()], not after).

The fifth patch wires the new flag to the new setfiles(8) option "-C".

Please CC me on all replies to the series; I'm not subscribed to the
SELinux mailing list. ("CONTRIBUTING.md" does not say that subscribing
is a requirement.)

Cc: "Richard W.M. Jones" <rjones@xxxxxxxxxx>
Cc: Petr Lautrbach <plautrba@xxxxxxxxxx>

Thanks,
Laszlo

Laszlo Ersek (5):
  setfiles: fix up inconsistent indentation
  setfiles: remove useless assignment and comment (after RHBZ#1926386)
  setfiles: remove useless "iamrestorecon" checks in option parsing
  selinux_restorecon: introduce SELINUX_RESTORECON_COUNT_ERRORS
  setfiles: introduce the -C option for distinguishing file tree walk
    errors

 libselinux/include/selinux/restorecon.h                     | 15 ++++++++
 libselinux/man/man3/selinux_restorecon.3                    | 22 +++++++++++-
 libselinux/man/man3/selinux_restorecon_get_skipped_errors.3 | 28 +++++++++++++++
 libselinux/src/libselinux.map                               |  5 +++
 libselinux/src/selinux_restorecon.c                         | 34 +++++++++++++++---
 policycoreutils/setfiles/restore.c                          |  8 +++--
 policycoreutils/setfiles/restore.h                          |  4 ++-
 policycoreutils/setfiles/setfiles.8                         | 22 ++++++++++++
 policycoreutils/setfiles/setfiles.c                         | 36 +++++++++-----------
 9 files changed, 145 insertions(+), 29 deletions(-)
 create mode 100644 libselinux/man/man3/selinux_restorecon_get_skipped_errors.3


base-commit: 2a167d1156578fc29541f6fb60af65452f431aae
-- 
2.19.1.3.g30247aa5d201


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