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find-esp: return pinned fd to ESP/XBOOTLDR

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The reworks the ESP/XBOOTLDR logic to pin the ESP/XBOOTLDR via an fd,
and return that as optional return parameter.

So far we only pinned the parent dir of the ESP/XBOOTLDR, which was
useful when verifying that ESP/XBOOTLDR is actually a mount point by
comparing mount ids. This however became obsolete with
a98a6eb95c. Hence, let's clean this up,
and pin the inode we really care about and return it.
This commit is contained in:
Lennart Poettering
2026-04-20 17:19:27 +02:00
parent 4712d70669
commit 853d0649d5
16 changed files with 293 additions and 273 deletions
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src/sysupdate/sysupdate-resource.c
+2 -2
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@@ -839,9 +839,9 @@ int resource_resolve_path(
} else { /* boot, esp, or xbootldr */
r = 0;
if (IN_SET(rr->path_relative_to, PATH_RELATIVE_TO_BOOT, PATH_RELATIVE_TO_XBOOTLDR))
r = find_xbootldr_and_warn(root, /* path= */ NULL, /* unprivileged_mode= */ -1, &relative_to);
r = find_xbootldr_and_warn(root, /* path= */ NULL, /* unprivileged_mode= */ -1, &relative_to, /* ret_fd= */ NULL);
if (r == -ENOKEY || rr->path_relative_to == PATH_RELATIVE_TO_ESP)
r = find_esp_and_warn(root, /* path= */ NULL, /* unprivileged_mode= */ -1, &relative_to);
r = find_esp_and_warn(root, /* path= */ NULL, /* unprivileged_mode= */ -1, &relative_to, /* ret_fd= */ NULL);
if (r < 0)
return log_error_errno(r, "Failed to resolve $BOOT: %m");
log_debug("Resolved $BOOT to '%s'", relative_to);