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sd-device: skip diskseq verification when ID_IGNORE_DISKSEQ property is set

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Some drivers do not announce the diskseq change.
E.g. for md devices, the kernel increments the diskseq *after*
emitting a 'change' uevent when backing block devices are added to
a md device, and udevd does not receive no uevent which contains
the new diskseq.
This commit is contained in:
Yu Watanabe
2022-04-14 00:10:28 +09:00
parent 17d97d4c90
commit 03b894fc09
1 changed files with 11 additions and 5 deletions
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src/libsystemd/sd-device/sd-device.c
+11 -5
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@@ -2281,7 +2281,7 @@ _public_ int sd_device_trigger_with_uuid(
_public_ int sd_device_open(sd_device *device, int flags) {
_cleanup_close_ int fd = -1, fd2 = -1;
const char *devname, *subsystem = NULL;
const char *devname, *subsystem = NULL, *val = NULL;
uint64_t q, diskseq = 0;
struct stat st;
dev_t devnum;
@@ -2306,10 +2306,6 @@ _public_ int sd_device_open(sd_device *device, int flags) {
if (r < 0 && r != -ENOENT)
return r;
r = sd_device_get_diskseq(device, &diskseq);
if (r < 0 && r != -ENOENT)
return r;
fd = open(devname, FLAGS_SET(flags, O_PATH) ? flags : O_CLOEXEC|O_NOFOLLOW|O_PATH);
if (fd < 0)
return -errno;
@@ -2327,6 +2323,16 @@ _public_ int sd_device_open(sd_device *device, int flags) {
if (FLAGS_SET(flags, O_PATH))
return TAKE_FD(fd);
r = sd_device_get_property_value(device, "ID_IGNORE_DISKSEQ", &val);
if (r < 0 && r != -ENOENT)
return r;
if (!val || parse_boolean(val) <= 0) {
r = sd_device_get_diskseq(device, &diskseq);
if (r < 0 && r != -ENOENT)
return r;
}
fd2 = open(FORMAT_PROC_FD_PATH(fd), flags);
if (fd2 < 0)
return -errno;