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nspawn: EROFS for chowning mount points is not fatal (#7122)

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This fixes --read-only with --private-users. mkdir_userns_p may return
-EROFS if either mkdir or lchown fails; lchown failing is fine as the
mount point will just be overmounted, and if mkdir fails then the
following mount() will also fail (with ENOENT).
This commit is contained in:
Lauri Tirkkonen 2017-10-24 20:40:50 +03:00 committed by Lennart Poettering
parent e6b2d948f8
commit 4f13e53428
1 changed files with 6 additions and 2 deletions
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8
src/nspawn/nspawn-mount.c
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@ -598,11 +598,15 @@ int mount_all(const char *dest,
r = mkdir_userns_p(dest, where, 0755, mount_settings, uid_shift);
if (r < 0 && r != -EEXIST) {
if (fatal)
if (fatal && r != -EROFS)
return log_error_errno(r, "Failed to create directory %s: %m", where);
log_debug_errno(r, "Failed to create directory %s: %m", where);
continue;
/* If we failed mkdir() or chown() due to the root
* directory being read only, attempt to mount this fs
* anyway and let mount_verbose log any errors */
if (r != -EROFS)
continue;
}
o = mount_table[k].options;