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timerfd: Implement c/r procedure

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Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov
2014-06-30 21:58:05 +04:00
committed by Pavel Emelyanov
parent 5c93ba3b7b
commit ecd432fe27
9 changed files with 346 additions and 0 deletions
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60
proc_parse.c
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@@ -1043,6 +1043,51 @@ static void parse_fhandle_encoded(char *tok, FhEntry *fh)
}
}
static int parse_timerfd(FILE *f, char *buf, size_t size, TimerfdEntry *tfy)
{
/*
* Format is
* clockid: 0
* ticks: 0
* settime flags: 01
* it_value: (0, 49406829)
* it_interval: (1, 0)
*/
if (sscanf(buf, "clockid: %d", &tfy->clockid) != 1)
goto parse_err;
if (!fgets(buf, size, f))
goto nodata;
if (sscanf(buf, "ticks: %llu", (unsigned long long *)&tfy->ticks) != 1)
goto parse_err;
if (!fgets(buf, size, f))
goto nodata;
if (sscanf(buf, "settime flags: 0%o", &tfy->settime_flags) != 1)
goto parse_err;
if (!fgets(buf, size, f))
goto nodata;
if (sscanf(buf, "it_value: (%llu, %llu)",
(unsigned long long *)&tfy->vsec,
(unsigned long long *)&tfy->vnsec) != 2)
goto parse_err;
if (!fgets(buf, size, f))
goto nodata;
if (sscanf(buf, "it_interval: (%llu, %llu)",
(unsigned long long *)&tfy->isec,
(unsigned long long *)&tfy->insec) != 2)
goto parse_err;
return 0;
parse_err:
return -1;
nodata:
pr_err("No data left in proc file while parsing timerfd\n");
goto parse_err;
}
#define fdinfo_field(str, field) !strncmp(str, field":", sizeof(field))
static int parse_fdinfo_pid_s(char *pid, int fd, int type,
@@ -1105,6 +1150,21 @@ static int parse_fdinfo_pid_s(char *pid, int fd, int type,
entry_met = true;
continue;
}
if (fdinfo_field(str, "clockid")) {
timerfd_entry__init(&entry.tfy);
if (type != FD_TYPES__TIMERFD)
goto parse_err;
ret = parse_timerfd(f, str, sizeof(str), &entry.tfy);
if (ret)
goto parse_err;
ret = cb(&entry, arg);
if (ret)
goto out;
entry_met = true;
continue;
}
if (fdinfo_field(str, "tfd")) {
eventpoll_tfd_entry__init(&entry.epl);