diff options
Diffstat (limited to 'qga/commands-posix.c')
| -rw-r--r-- | qga/commands-posix.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/qga/commands-posix.c b/qga/commands-posix.c index 69f209af87..12b50b7124 100644 --- a/qga/commands-posix.c +++ b/qga/commands-posix.c @@ -2783,6 +2783,122 @@ GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) return info; } +#define MAX_NAME_LEN 128 +static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp) +{ +#ifdef CONFIG_LINUX + GuestDiskStatsInfoList *head = NULL, **tail = &head; + const char *diskstats = "/proc/diskstats"; + FILE *fp; + size_t n; + char *line = NULL; + + fp = fopen(diskstats, "r"); + if (fp == NULL) { + error_setg_errno(errp, errno, "open(\"%s\")", diskstats); + return NULL; + } + + while (getline(&line, &n, fp) != -1) { + g_autofree GuestDiskStatsInfo *diskstatinfo = NULL; + g_autofree GuestDiskStats *diskstat = NULL; + char dev_name[MAX_NAME_LEN]; + unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks; + unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios; + unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec; + unsigned long dc_ios, dc_merges, dc_sec, fl_ios; + unsigned int major, minor; + int i; + + i = sscanf(line, "%u %u %s %lu %lu %lu" + "%lu %lu %lu %lu %u %u %u %u" + "%lu %lu %lu %u %lu %u", + &major, &minor, dev_name, + &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, + &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec, + &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks, + &dc_ios, &dc_merges, &dc_sec, &dc_ticks, + &fl_ios, &fl_ticks); + + if (i < 7) { + continue; + } + + diskstatinfo = g_new0(GuestDiskStatsInfo, 1); + diskstatinfo->name = g_strdup(dev_name); + diskstatinfo->major = major; + diskstatinfo->minor = minor; + + diskstat = g_new0(GuestDiskStats, 1); + if (i == 7) { + diskstat->has_read_ios = true; + diskstat->read_ios = rd_ios; + diskstat->has_read_sectors = true; + diskstat->read_sectors = rd_merges_or_rd_sec; + diskstat->has_write_ios = true; + diskstat->write_ios = rd_sec_or_wr_ios; + diskstat->has_write_sectors = true; + diskstat->write_sectors = rd_ticks_or_wr_sec; + } + if (i >= 14) { + diskstat->has_read_ios = true; + diskstat->read_ios = rd_ios; + diskstat->has_read_sectors = true; + diskstat->read_sectors = rd_sec_or_wr_ios; + diskstat->has_read_merges = true; + diskstat->read_merges = rd_merges_or_rd_sec; + diskstat->has_read_ticks = true; + diskstat->read_ticks = rd_ticks_or_wr_sec; + diskstat->has_write_ios = true; + diskstat->write_ios = wr_ios; + diskstat->has_write_sectors = true; + diskstat->write_sectors = wr_sec; + diskstat->has_write_merges = true; + diskstat->write_merges = wr_merges; + diskstat->has_write_ticks = true; + diskstat->write_ticks = wr_ticks; + diskstat->has_ios_pgr = true; + diskstat->ios_pgr = ios_pgr; + diskstat->has_total_ticks = true; + diskstat->total_ticks = tot_ticks; + diskstat->has_weight_ticks = true; + diskstat->weight_ticks = rq_ticks; + } + if (i >= 18) { + diskstat->has_discard_ios = true; + diskstat->discard_ios = dc_ios; + diskstat->has_discard_merges = true; + diskstat->discard_merges = dc_merges; + diskstat->has_discard_sectors = true; + diskstat->discard_sectors = dc_sec; + diskstat->has_discard_ticks = true; + diskstat->discard_ticks = dc_ticks; + } + if (i >= 20) { + diskstat->has_flush_ios = true; + diskstat->flush_ios = fl_ios; + diskstat->has_flush_ticks = true; + diskstat->flush_ticks = fl_ticks; + } + + diskstatinfo->stats = g_steal_pointer(&diskstat); + QAPI_LIST_APPEND(tail, diskstatinfo); + diskstatinfo = NULL; + } + free(line); + fclose(fp); + return head; +#else + g_debug("disk stats reporting available only for Linux"); + return NULL; +#endif +} + +GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) +{ + return guest_get_diskstats(errp); +} + #else /* defined(__linux__) */ void qmp_guest_suspend_disk(Error **errp) @@ -3131,6 +3247,13 @@ GuestDiskInfoList *qmp_guest_get_disks(Error **errp) return NULL; } +GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) +{ + error_setg(errp, QERR_UNSUPPORTED); + return NULL; +} + + #endif /* CONFIG_FSFREEZE */ #if !defined(CONFIG_FSTRIM) |