Line data Source code
1 0 : GQuark bd_mpath_error_quark (void) {
2 0 : return g_quark_from_static_string ("g-bd-mpath-error-quark");
3 : }
4 :
5 0 : static gboolean bd_mpath_is_tech_avail_stub (BDMpathTech tech G_GNUC_UNUSED, guint64 mode G_GNUC_UNUSED, GError **error) {
6 0 : bd_utils_log_format (BD_UTILS_LOG_CRIT, "The function 'bd_mpath_is_tech_avail' called, but not implemented!");
7 0 : g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,
8 : "The function 'bd_mpath_is_tech_avail' called, but not implemented!");
9 0 : return FALSE;
10 : }
11 :
12 : static gboolean (*_bd_mpath_is_tech_avail) (BDMpathTech tech, guint64 mode, GError **error) = bd_mpath_is_tech_avail_stub;
13 :
14 : /**
15 : * bd_mpath_is_tech_avail:
16 : * @tech: the queried tech
17 : * @mode: a bit mask of queried modes of operation for @tech
18 : * @error: (out) (optional): place to store error (details about why the @tech-@mode combination is not available)
19 : *
20 : * Returns: whether the @tech-@mode combination is available -- supported by the
21 : * plugin implementation and having all the runtime dependencies available
22 : */
23 4 : gboolean bd_mpath_is_tech_avail (BDMpathTech tech, guint64 mode, GError **error) {
24 4 : return _bd_mpath_is_tech_avail (tech, mode, error);
25 : }
26 :
27 :
28 0 : static gboolean bd_mpath_flush_mpaths_stub (GError **error) {
29 0 : bd_utils_log_format (BD_UTILS_LOG_CRIT, "The function 'bd_mpath_flush_mpaths' called, but not implemented!");
30 0 : g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,
31 : "The function 'bd_mpath_flush_mpaths' called, but not implemented!");
32 0 : return FALSE;
33 : }
34 :
35 : static gboolean (*_bd_mpath_flush_mpaths) (GError **error) = bd_mpath_flush_mpaths_stub;
36 :
37 : /**
38 : * bd_mpath_flush_mpaths:
39 : * @error: (out) (optional): place to store error (if any)
40 : *
41 : * Returns: whether multipath device maps were successfully flushed or not
42 : *
43 : * Flushes all unused multipath device maps.
44 : *
45 : * Tech category: %BD_MPATH_TECH_BASE-%BD_MPATH_TECH_MODE_MODIFY
46 : */
47 1 : gboolean bd_mpath_flush_mpaths (GError **error) {
48 1 : return _bd_mpath_flush_mpaths (error);
49 : }
50 :
51 :
52 0 : static gboolean bd_mpath_is_mpath_member_stub (const gchar *device G_GNUC_UNUSED, GError **error) {
53 0 : bd_utils_log_format (BD_UTILS_LOG_CRIT, "The function 'bd_mpath_is_mpath_member' called, but not implemented!");
54 0 : g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,
55 : "The function 'bd_mpath_is_mpath_member' called, but not implemented!");
56 0 : return FALSE;
57 : }
58 :
59 : static gboolean (*_bd_mpath_is_mpath_member) (const gchar *device, GError **error) = bd_mpath_is_mpath_member_stub;
60 :
61 : /**
62 : * bd_mpath_is_mpath_member:
63 : * @device: device to test
64 : * @error: (out) (optional): place to store error (if any)
65 : *
66 : * Returns: %TRUE if the device is a multipath member, %FALSE if not or an error
67 : * appeared when queried (@error is set in those cases)
68 : *
69 : * Tech category: %BD_MPATH_TECH_BASE-%BD_MPATH_TECH_MODE_QUERY
70 : */
71 1 : gboolean bd_mpath_is_mpath_member (const gchar *device, GError **error) {
72 1 : return _bd_mpath_is_mpath_member (device, error);
73 : }
74 :
75 :
76 0 : static gchar** bd_mpath_get_mpath_members_stub (GError **error) {
77 0 : bd_utils_log_format (BD_UTILS_LOG_CRIT, "The function 'bd_mpath_get_mpath_members' called, but not implemented!");
78 0 : g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,
79 : "The function 'bd_mpath_get_mpath_members' called, but not implemented!");
80 0 : return NULL;
81 : }
82 :
83 : static gchar** (*_bd_mpath_get_mpath_members) (GError **error) = bd_mpath_get_mpath_members_stub;
84 :
85 : /**
86 : * bd_mpath_get_mpath_members:
87 : * @error: (out) (optional): place to store error (if any)
88 : *
89 : * Returns: (transfer full) (array zero-terminated=1): list of names of all devices that are
90 : * members of the mpath mappings (or %NULL
91 : * in case of error)
92 : *
93 : * Tech category: %BD_MPATH_TECH_BASE-%BD_MPATH_TECH_MODE_QUERY
94 : */
95 1 : gchar** bd_mpath_get_mpath_members (GError **error) {
96 1 : return _bd_mpath_get_mpath_members (error);
97 : }
98 :
99 :
100 0 : static gboolean bd_mpath_set_friendly_names_stub (gboolean enabled G_GNUC_UNUSED, GError **error) {
101 0 : bd_utils_log_format (BD_UTILS_LOG_CRIT, "The function 'bd_mpath_set_friendly_names' called, but not implemented!");
102 0 : g_set_error (error, BD_INIT_ERROR, BD_INIT_ERROR_NOT_IMPLEMENTED,
103 : "The function 'bd_mpath_set_friendly_names' called, but not implemented!");
104 0 : return FALSE;
105 : }
106 :
107 : static gboolean (*_bd_mpath_set_friendly_names) (gboolean enabled, GError **error) = bd_mpath_set_friendly_names_stub;
108 :
109 : /**
110 : * bd_mpath_set_friendly_names:
111 : * @enabled: whether friendly names should be enabled or not
112 : * @error: (out) (optional): place to store error (if any)
113 : *
114 : * Returns: if successfully set or not
115 : *
116 : * Tech category: %BD_MPATH_TECH_FRIENDLY_NAMES-%BD_MPATH_TECH_MODE_MODIFY
117 : */
118 1 : gboolean bd_mpath_set_friendly_names (gboolean enabled, GError **error) {
119 1 : return _bd_mpath_set_friendly_names (enabled, error);
120 : }
121 :
122 :
123 3 : static gpointer load_mpath_from_plugin(const gchar *so_name) {
124 3 : void *handle = NULL;
125 3 : char *error = NULL;
126 3 : gboolean (*init_fn) (void) = NULL;
127 :
128 3 : handle = dlopen(so_name, RTLD_LAZY);
129 3 : if (!handle) {
130 0 : bd_utils_log_format (BD_UTILS_LOG_WARNING, "failed to load module mpath: %s", dlerror());
131 0 : return NULL;
132 : }
133 :
134 3 : dlerror();
135 3 : * (void**) (&init_fn) = dlsym(handle, "bd_mpath_init");
136 3 : if ((error = dlerror()) != NULL)
137 0 : bd_utils_log_format (BD_UTILS_LOG_DEBUG, "failed to load the init() function for mpath: %s", error);
138 : /* coverity[dead_error_condition] */
139 3 : if (init_fn && !init_fn()) {
140 0 : dlclose(handle);
141 0 : return NULL;
142 : }
143 3 : init_fn = NULL;
144 :
145 3 : dlerror();
146 3 : * (void**) (&_bd_mpath_is_tech_avail) = dlsym(handle, "bd_mpath_is_tech_avail");
147 3 : if ((error = dlerror()) != NULL)
148 0 : bd_utils_log_format (BD_UTILS_LOG_WARNING, "failed to load bd_mpath_is_tech_avail: %s", error);
149 :
150 3 : dlerror();
151 3 : * (void**) (&_bd_mpath_flush_mpaths) = dlsym(handle, "bd_mpath_flush_mpaths");
152 3 : if ((error = dlerror()) != NULL)
153 0 : bd_utils_log_format (BD_UTILS_LOG_WARNING, "failed to load bd_mpath_flush_mpaths: %s", error);
154 :
155 3 : dlerror();
156 3 : * (void**) (&_bd_mpath_is_mpath_member) = dlsym(handle, "bd_mpath_is_mpath_member");
157 3 : if ((error = dlerror()) != NULL)
158 0 : bd_utils_log_format (BD_UTILS_LOG_WARNING, "failed to load bd_mpath_is_mpath_member: %s", error);
159 :
160 3 : dlerror();
161 3 : * (void**) (&_bd_mpath_get_mpath_members) = dlsym(handle, "bd_mpath_get_mpath_members");
162 3 : if ((error = dlerror()) != NULL)
163 0 : bd_utils_log_format (BD_UTILS_LOG_WARNING, "failed to load bd_mpath_get_mpath_members: %s", error);
164 :
165 3 : dlerror();
166 3 : * (void**) (&_bd_mpath_set_friendly_names) = dlsym(handle, "bd_mpath_set_friendly_names");
167 3 : if ((error = dlerror()) != NULL)
168 0 : bd_utils_log_format (BD_UTILS_LOG_WARNING, "failed to load bd_mpath_set_friendly_names: %s", error);
169 :
170 3 : return handle;
171 : }
172 :
173 3 : static gboolean unload_mpath (gpointer handle) {
174 3 : char *error = NULL;
175 3 : gboolean (*close_fn) (void) = NULL;
176 :
177 3 : _bd_mpath_is_tech_avail = bd_mpath_is_tech_avail_stub;
178 3 : _bd_mpath_flush_mpaths = bd_mpath_flush_mpaths_stub;
179 3 : _bd_mpath_is_mpath_member = bd_mpath_is_mpath_member_stub;
180 3 : _bd_mpath_get_mpath_members = bd_mpath_get_mpath_members_stub;
181 3 : _bd_mpath_set_friendly_names = bd_mpath_set_friendly_names_stub;
182 :
183 3 : dlerror();
184 3 : * (void**) (&close_fn) = dlsym(handle, "bd_mpath_close");
185 3 : if (((error = dlerror()) != NULL) || !close_fn)
186 0 : bd_utils_log_format (BD_UTILS_LOG_DEBUG, "failed to load the close_plugin() function for mpath: %s", error);
187 : /* coverity[dead_error_condition] */
188 3 : if (close_fn) {
189 3 : close_fn();
190 : }
191 :
192 3 : return dlclose(handle) == 0;
193 : }
194 :
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