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automount: make user unmounting for automount units more debuggable

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Let's add an explicit log message plus an error state for automount
units, if users explicitly unmounted our autofs mount.

Prompted by: #17448
This commit is contained in:
Lennart Poettering 2020-10-27 09:56:08 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent bfeb927a55
commit acd156d197
2 changed files with 8 additions and 0 deletions
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7
src/core/automount.c
View File

@ -971,6 +971,12 @@ static int automount_dispatch_io(sd_event_source *s, int fd, uint32_t events, vo
assert(a);
assert(fd == a->pipe_fd);
if (events & (EPOLLHUP|EPOLLERR)) {
log_unit_error(UNIT(a), "Got hangup/error on autofs pipe from kernel. Likely our automount point has been unmounted by someone or something else?");
automount_enter_dead(a, AUTOMOUNT_FAILURE_UNMOUNTED);
return 0;
}
if (events != EPOLLIN) {
log_unit_error(UNIT(a), "Got invalid poll event %"PRIu32" on pipe (fd=%d)", events, fd);
goto fail;
@ -1070,6 +1076,7 @@ static const char* const automount_result_table[_AUTOMOUNT_RESULT_MAX] = {
[AUTOMOUNT_FAILURE_RESOURCES] = "resources",
[AUTOMOUNT_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
[AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT] = "mount-start-limit-hit",
[AUTOMOUNT_FAILURE_UNMOUNTED] = "unmounted",
};
DEFINE_STRING_TABLE_LOOKUP(automount_result, AutomountResult);

1
src/core/automount.h
View File

@ -8,6 +8,7 @@ typedef struct Automount Automount;
typedef enum AutomountResult {
AUTOMOUNT_SUCCESS,
AUTOMOUNT_FAILURE_RESOURCES,
AUTOMOUNT_FAILURE_UNMOUNTED,
AUTOMOUNT_FAILURE_START_LIMIT_HIT,
AUTOMOUNT_FAILURE_MOUNT_START_LIMIT_HIT,
_AUTOMOUNT_RESULT_MAX,