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libguestfs/SOURCES/0008-inspection-More-reliab...

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From e1b339688e5f8f2a14fe0c7e9d02ad68004e4655 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 15 Apr 2021 09:18:22 +0100
Subject: [PATCH] inspection: More reliable detection of Linux split /usr
configurations
In RHEL 8+, /usr/etc no longer exists. Since we were looking for this
directory in order to detect a separate /usr partition, those were no
longer detected, so the merging of /usr data into the root was not
being done. The result was incomplete inspection data and failure of
virt-v2v.
All Linux systems since forever have had /usr/src but not /src, so
detect this instead.
Furthermore the merging code didn't work, because we expected that the
root filesystem had a distro assigned, but in this configuration we
may need to look for that information in /usr/lib/os-release (not on
the root filesystem). This change makes the merging work even if we
have incomplete information about the root filesystem, so long as we
have an /etc/fstab entry pointing to the /usr mountpoint.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1949683
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1930133
Fixes: commit 394d11be49121884295e61964ed47f5a8488c252
(cherry picked from commit 26427b9ecc64e7e5e53a1d577cef9dc080d08877)
---
daemon/inspect.ml | 33 +++++++++++++++------------------
daemon/inspect_fs.ml | 6 +++---
2 files changed, 18 insertions(+), 21 deletions(-)
diff --git a/daemon/inspect.ml b/daemon/inspect.ml
index 945a476f6..fb75b4a6c 100644
--- a/daemon/inspect.ml
+++ b/daemon/inspect.ml
@@ -182,11 +182,9 @@ and check_for_duplicated_bsd_root fses =
and collect_linux_inspection_info fses =
List.map (
function
- | { role = RoleRoot { distro = Some d } } as root ->
- if d <> DISTRO_COREOS then
- collect_linux_inspection_info_for fses root
- else
- root
+ | { role = RoleRoot { distro = Some DISTRO_COREOS } } as root -> root
+ | { role = RoleRoot _ } as root ->
+ collect_linux_inspection_info_for fses root
| fs -> fs
) fses
@@ -196,29 +194,28 @@ and collect_linux_inspection_info fses =
* or other ways to identify the OS).
*)
and collect_linux_inspection_info_for fses root =
- let root_distro, root_fstab =
+ let root_fstab =
match root with
- | { role = RoleRoot { distro = Some d; fstab = f } } -> d, f
+ | { role = RoleRoot { fstab = f } } -> f
| _ -> assert false in
try
let usr =
List.find (
function
- | { role = RoleUsr { distro = d } }
- when d = Some root_distro || d = None -> true
+ | { role = RoleUsr _; fs_location = usr_mp } ->
+ (* This checks that this usr is found in the fstab of
+ * the root filesystem.
+ *)
+ List.exists (
+ fun (mountable, _) ->
+ usr_mp.mountable = mountable
+ ) root_fstab
| _ -> false
) fses in
- let usr_mountable = usr.fs_location.mountable in
-
- (* This checks that [usr] is found in the fstab of the root
- * filesystem. If not, [Not_found] is thrown.
- *)
- ignore (
- List.find (fun (mountable, _) -> usr_mountable = mountable) root_fstab
- );
-
+ eprintf "collect_linux_inspection_info_for: merging:\n%sinto:\n%s"
+ (string_of_fs usr) (string_of_fs root);
merge usr root;
root
with
diff --git a/daemon/inspect_fs.ml b/daemon/inspect_fs.ml
index 6e00c7083..02b5a0470 100644
--- a/daemon/inspect_fs.ml
+++ b/daemon/inspect_fs.ml
@@ -164,10 +164,10 @@ and check_filesystem mountable =
()
)
(* Linux /usr? *)
- else if Is.is_dir "/etc" &&
- Is.is_dir "/bin" &&
- Is.is_dir "/share" &&
+ else if Is.is_dir "/bin" &&
Is.is_dir "/local" &&
+ Is.is_dir "/share" &&
+ Is.is_dir "/src" &&
not (Is.is_file "/etc/fstab") then (
debug_matching "Linux /usr";
role := `Usr;
--
2.31.1