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Merge pull request #24467 from qdeslandes/nspawn_rootidmap

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nspawn: add rootidmap as --bind option
This commit is contained in:
Yu Watanabe
2022-09-06 03:45:53 +09:00
committed by GitHub
parent 559bf6b351 2b2777eda9
commit 6f2cea06bf
7 changed files with 84 additions and 42 deletions
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src/basic/user-util.h
+3 -3
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@@ -67,9 +67,9 @@ int take_etc_passwd_lock(const char *root);
#define UID_NOBODY ((uid_t) 65534U)
#define GID_NOBODY ((gid_t) 65534U)
/* If REMOUNT_IDMAP_HOST_ROOT is set for remount_idmap() we'll include a mapping here that maps the host root
* user accessing the idmapped mount to the this user ID on the backing fs. This is the last valid UID in the
* *signed* 32bit range. You might wonder why precisely use this specific UID for this purpose? Well, we
/* If REMOUNT_IDMAPPING_HOST_ROOT is set for remount_idmap() we'll include a mapping here that maps the host
* root user accessing the idmapped mount to the this user ID on the backing fs. This is the last valid UID in
* the *signed* 32bit range. You might wonder why precisely use this specific UID for this purpose? Well, we
* definitely cannot use the first 0…65536 UIDs for that, since in most cases that's precisely the file range
* we intend to map to some high UID range, and since UID mappings have to be bijective we thus cannot use
* them at all. Furthermore the UID range beyond INT32_MAX (i.e. the range above the signed 32bit range) is