diff options
| -rw-r--r-- | rootdir.c | 96 |
1 files changed, 91 insertions, 5 deletions
@@ -1,3 +1,4 @@ +#include <mach/vm_param.h> #include <mach/vm_statistics.h> #include <stdio.h> #include <unistd.h> @@ -9,7 +10,10 @@ #include "procfs_dir.h" #include "main.h" -/* This implements a directory node with the static files in /proc */ +/* This implements a directory node with the static files in /proc. + NB: the libps functions for host information return static storage; + using them would require locking and as a consequence it would be + more complicated, not simpler. */ #define INIT_PID 1 @@ -147,10 +151,83 @@ rootdir_gc_loadavg (void *hook, void **contents, size_t *contents_len) } static error_t -rootdir_gc_empty (void *hook, void **contents, size_t *contents_len) +rootdir_gc_meminfo (void *hook, void **contents, size_t *contents_len) { - *contents_len = 0; - return 0; + host_basic_info_data_t hbi; + mach_msg_type_number_t cnt; + struct vm_statistics vmstats; + error_t err; + + err = vm_statistics (mach_task_self (), &vmstats); + if (err) + return EIO; + + cnt = HOST_BASIC_INFO_COUNT; + err = host_info (mach_host_self (), HOST_BASIC_INFO, (host_info_t) &hbi, &cnt); + if (err) + return err; + + assert (cnt == HOST_BASIC_INFO_COUNT); + *contents_len = asprintf ((char **) contents, + "MemTotal: %14lu kB\n" + "MemFree: %14lu kB\n" + "Active: %14lu kB\n" + "Inactive: %14lu kB\n" + "Mlocked: %14lu kB\n" + , + /* TODO: check that these are really 1024-bytes kBs. */ + (long unsigned) hbi.memory_size / 1024, + (long unsigned) vmstats.free_count * PAGE_SIZE / 1024, + (long unsigned) vmstats.active_count * PAGE_SIZE / 1024, + (long unsigned) vmstats.inactive_count * PAGE_SIZE / 1024, + (long unsigned) vmstats.wire_count * PAGE_SIZE / 1024); + + return *contents_len >= 0 ? 0 : ENOMEM; +} + +static error_t +rootdir_gc_vmstat (void *hook, void **contents, size_t *contents_len) +{ + host_basic_info_data_t hbi; + mach_msg_type_number_t cnt; + struct vm_statistics vmstats; + error_t err; + + err = vm_statistics (mach_task_self (), &vmstats); + if (err) + return EIO; + + cnt = HOST_BASIC_INFO_COUNT; + err = host_info (mach_host_self (), HOST_BASIC_INFO, (host_info_t) &hbi, &cnt); + if (err) + return err; + + assert (cnt == HOST_BASIC_INFO_COUNT); + *contents_len = asprintf ((char **) contents, + "nr_free_pages %lu\n" + "nr_inactive_anon %lu\n" + "nr_active_anon %lu\n" + "nr_inactive_file %lu\n" + "nr_active_file %lu\n" + "nr_unevictable %lu\n" + "nr_mlock %lu\n" + "pgpgin %lu\n" + "pgpgout %lu\n" + "pgfault %lu\n", + (long unsigned) vmstats.free_count, + /* FIXME: how can we distinguish the anon/file pages? Maybe we can + ask the default pager how many it manages? */ + (long unsigned) vmstats.inactive_count, + (long unsigned) vmstats.active_count, + (long unsigned) 0, + (long unsigned) 0, + (long unsigned) vmstats.wire_count, + (long unsigned) vmstats.wire_count, + (long unsigned) vmstats.pageins, + (long unsigned) vmstats.pageouts, + (long unsigned) vmstats.faults); + + return *contents_len >= 0 ? 0 : ENOMEM; } static error_t @@ -221,7 +298,16 @@ static const struct procfs_dir_entry rootdir_entries[] = { .name = "meminfo", .make_node = rootdir_file_make_node, .hook = & (struct procfs_node_ops) { - .get_contents = rootdir_gc_empty, + .get_contents = rootdir_gc_meminfo, + .cleanup_contents = procfs_cleanup_contents_with_free, + }, + }, + { + .name = "vmstat", + .make_node = rootdir_file_make_node, + .hook = & (struct procfs_node_ops) { + .get_contents = rootdir_gc_vmstat, + .cleanup_contents = procfs_cleanup_contents_with_free, }, }, {} |