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tree-wide: increase granularity of percent specifications all over the place to permille

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We so far had various placed we'd parse percentages with
parse_percent(). Let's make them use parse_permille() instead, which is
downward compatible (as it also parses percent values), and increases
the granularity a bit. Given that on the wire we usually normalize
relative specifications to something like UINT32_MAX anyway changing
from base-100 to base-1000 calculations can be done easily without
breaking compat.

This commit doesn't document this change in the man pages. While
allowing more precise specifcations permille is not as commonly
understood as perent I guess, hence let's keep this out of the docs for
now.
This commit is contained in:
Lennart Poettering
2018-07-25 16:14:45 +02:00
parent 8cbc92d597
commit f806dfd345
4 changed files with 23 additions and 21 deletions
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src/shared/bus-unit-util.c
+12 -10
View File
@@ -422,16 +422,16 @@ static int bus_append_cgroup_property(sd_bus_message *m, const char *field, cons
return 1;
}
r = parse_percent(eq);
r = parse_permille(eq);
if (r >= 0) {
char *n;
/* When this is a percentage we'll convert this into a relative value in the range
* 0…UINT32_MAX and pass it in the MemoryLowScale property (and related
* ones). This way the physical memory size can be determined server-side */
/* When this is a percentage we'll convert this into a relative value in the range 0…UINT32_MAX
* and pass it in the MemoryLowScale property (and related ones). This way the physical memory
* size can be determined server-side. */
n = strjoina(field, "Scale");
r = sd_bus_message_append(m, "(sv)", n, "u", (uint32_t) (((uint64_t) UINT32_MAX * r) / 100U));
r = sd_bus_message_append(m, "(sv)", n, "u", (uint32_t) (((uint64_t) r * UINT32_MAX) / 1000U));
if (r < 0)
return bus_log_create_error(r);
@@ -449,13 +449,15 @@ static int bus_append_cgroup_property(sd_bus_message *m, const char *field, cons
if (isempty(eq))
r = sd_bus_message_append(m, "(sv)", "CPUQuotaPerSecUSec", "t", USEC_INFINITY);
else {
r = parse_percent_unbounded(eq);
if (r <= 0) {
log_error_errno(r, "CPU quota '%s' invalid.", eq);
return -EINVAL;
r = parse_permille_unbounded(eq);
if (r == 0) {
log_error("CPU quota too small.");
return -ERANGE;
}
if (r < 0)
return log_error_errno(r, "CPU quota '%s' invalid.", eq);
r = sd_bus_message_append(m, "(sv)", "CPUQuotaPerSecUSec", "t", (usec_t) r * USEC_PER_SEC / 100U);
r = sd_bus_message_append(m, "(sv)", "CPUQuotaPerSecUSec", "t", (((uint64_t) r * USEC_PER_SEC) / 1000U));
}
if (r < 0)