Mercurial > archived > louis > perso > liblxcstats

annotate container.c @ 8:fe254ba0818d

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Add missing frees
author Louis Opter <louis@dotcloud.com>
date Sun, 02 Jan 2011 01:14:56 +0100
parents 8339ab15527d
children
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1 #include <sys/types.h>
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2 #include <sys/stat.h>
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3
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4 #include <assert.h>
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5 #include <dirent.h>
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6 #include <err.h>
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7 #include <errno.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10
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11 #include "lxcstats.h"
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12 #include "_lxcstats.h"
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13
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14 static int
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15 _lxcst_unselect_current_and_parent(const struct dirent* d)
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16 {
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17 return (strcmp(d->d_name, ".") && strcmp(d->d_name, ".."));
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18 }
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19
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20 struct lxcst *
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21 _lxcst_container_new(const struct _lxcst_controller *ct, const char *name)
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22 {
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23 char buf[256];
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24 struct lxcst *c;
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25
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26 assert(ct);
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27 assert(name);
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28
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29 c = calloc(1, sizeof(*c));
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30 if (!c)
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31 return (NULL);
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32
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33 _lxcst_join_path(buf, sizeof(buf), ct->cgroup_dir, name);
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34
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35 c->name = strdup(name);
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36 c->cgroup_dir = strdup(buf);
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37 if (!c->name || !c->cgroup_dir)
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38 goto free_container;
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39
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40 return (c);
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41
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42 free_container:
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43 free(c->name);
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44 free(c->cgroup_dir);
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45 free(c);
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46 return (NULL);
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47 }
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48
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49 void
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50 _lxcst_container_delete(struct lxcst *c)
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51 {
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52 if (c) {
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53 free(c->name);
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54 free(c->cgroup_dir);
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55 free(c->cpuacct.percpu);
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56 free(c);
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57 }
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58 }
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59
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60 /*
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61 * Should be equivalent to the number of directories found under /var/lib/lxc/
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62 */
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63 int
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64 _lxcst_container_count(const struct _lxcst_controller *ct)
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65 {
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66 int n;
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67 struct dirent **c_vec;
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68 int count;
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69 char buf[PATH_MAX];
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70
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71 n = scandir(ct->lxc_dir, &c_vec, &_lxcst_unselect_current_and_parent, NULL);
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72 if (n != -1) {
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73 count = n;
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74 while (n--) {
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75 if (!_lxcst_isdir(_lxcst_join_path(buf, sizeof(buf), ct->lxc_dir, c_vec[n]->d_name)))
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76 --count;
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77 free(c_vec[n]);
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78 }
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79 free(c_vec);
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80 return (count);
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81 }
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82
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83 return (-1);
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84 }
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85
0
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86 int
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87 _lxcst_container_read_infos(struct lxcst *c)
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88 {
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89 int i;
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90
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91 assert(c);
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92
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93 for (i = 0; _lxcst_probes[i].fn; ++i)
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94 if (_lxcst_probes[i].fn((c)))
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95 warn("%s probe failed for container %s", _lxcst_probes[i].name, c->name);
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96
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97 return (0);
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98 }
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99
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100 int
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101 lxcst_span_containers(lxcst_handle *hdl, int (*cb)(void *, const struct lxcst *), void *ctx)
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102 {
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103 int n;
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104 struct dirent **c_vec;
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105 struct lxcst *c;
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106 char buf[PATH_MAX];
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107
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108 assert(hdl);
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109 assert(hdl->cgroup_dir);
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110 assert(cb);
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111
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112 _lxcst_globals_reset();
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113
0
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114 n = scandir(hdl->cgroup_dir, &c_vec, &_lxcst_unselect_current_and_parent, NULL);
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115 if (n > 0) {
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116 while (n--) {
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117 if (_lxcst_isdir(_lxcst_join_path(buf, sizeof(buf), hdl->cgroup_dir, c_vec[n]->d_name))) {
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118 c = _lxcst_container_new(hdl, c_vec[n]->d_name);
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119 _lxcst_globals.running_containers++;
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120 if (c && _lxcst_container_read_infos(c) == 0
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121 && cb(ctx, c)) {
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122 errno = EINTR;
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123 goto abort_by_cb;
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124 }
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125 _lxcst_container_delete(c);
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126 }
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127 free(c_vec[n]);
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128 }
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129 free(c_vec);
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130 } else if (n < 0) {
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131 return (-1);
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132 }
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133
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134 n = _lxcst_container_count(hdl);
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135 if (n == -1) {
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136 warn("can't get the total number of containers");
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137 return (-1);
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138 }
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139
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140 _lxcst_globals.stopped_containers = n - _lxcst_globals.running_containers;
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141
0
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142 return (0);
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143
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144 abort_by_cb:
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145 _lxcst_container_delete(c);
0
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146 free(c_vec[n + 1]);
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147 while (n--)
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148 free(c_vec[n]);
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149 free(c_vec);
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150 return (-1);
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151 }