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network: update comment and log message

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After 4b30f2e135ee84041bb597edca7225858f4ef4fb, reading stable_secret
sysctl property fails with -ENOMEM, instead of -EIO.
This is due to read_full_virtual_file() uses read() as the backend while
read_one_line_file() uses fgetc(). And each functions return different
error on fails.

Anyway, the failure is harmless here. So, the log message and comment is
updated.

Closes one of the issues in #19410.

(cherry picked from commit 0e27527170aa0179f2a4b3b55b78ddc049f815b9)
(cherry picked from commit 2417e9b59aa654e4b3def3399576ebbc2cdd7c95)
This commit is contained in:
Yu Watanabe 2021-04-26 09:03:33 +09:00 committed by Zbigniew Jędrzejewski-Szmek
parent 42a2588608
commit 0d80d62a87
1 changed files with 3 additions and 2 deletions
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5
src/network/networkd-link.c
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@ -1345,8 +1345,9 @@ static int link_configure_addrgen_mode(Link *link) {
r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
if (r < 0) {
/* The file may not exist. And even if it exists, when stable_secret is unset,
* reading the file fails with EIO. */
log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
* reading the file fails with ENOMEM when read_full_virtual_file(), which uses
* read() as the backend, and EIO when read_one_line_file() which uses fgetc(). */
log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret, ignoring: %m");
ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
} else