#include <sys/wait.h>
#include <talloc/talloc.h>
+#include <list/list.h>
#include <pb-protocol/pb-protocol.h>
#include "device-handler.h"
#define MOUNT_BIN "/bin/mount"
+#define UMOUNT_BIN "/bin/umount"
+
struct device_handler {
struct discover_server *server;
struct device *devices;
int n_devices;
+
+ struct list contexts;
};
struct discover_context {
+ char *id;
char *device_path;
char *mount_path;
struct udev_event *event;
struct device *device;
char **links;
int n_links;
+
+ struct list_item list;
};
struct mount_map {
return 0;
}
+static int rmdir_recursive(const char *base, const char *dir)
+{
+ char *cur, *pos;
+
+ /* sanity check: make sure that dir is within base */
+ if (strncmp(base, dir, strlen(base)))
+ return -1;
+
+ cur = talloc_strdup(NULL, dir);
+
+ while (strcmp(base, dir)) {
+
+ rmdir(dir);
+
+ /* null-terminate at the last slash */
+ pos = strrchr(dir, '/');
+ if (!pos)
+ break;
+
+ *pos = '\0';
+ }
+
+ talloc_free(cur);
+
+ return 0;
+}
+
static void setup_device_links(struct discover_context *ctx)
{
struct link {
const char *value;
value = udev_event_param(ctx->event, link->env);
- if (!value)
+ if (!value || !*value)
continue;
enc = encode_label(ctx, value);
}
}
+static void remove_device_links(struct discover_context *ctx)
+{
+ int i;
+
+ for (i = 0; i < ctx->n_links; i++)
+ unlink(ctx->links[i]);
+}
+
static int mount_device(struct discover_context *ctx)
{
const char *mountpoint;
- struct stat statbuf;
int status;
pid_t pid;
ctx->mount_path = talloc_strdup(ctx, mountpoint);
}
- if (stat(ctx->mount_path, &statbuf)) {
- if (mkdir(ctx->mount_path, 0755)) {
- pb_log("couldn't create mount directory %s: %s\n",
- ctx->mount_path, strerror(errno));
- return -1;
- }
- } else {
- if (!S_ISDIR(statbuf.st_mode)) {
- pb_log("mountpoint %s exists, but isn't a directory\n",
- ctx->mount_path);
- return -1;
- }
- }
+ if (mkdir_recursive(ctx->mount_path))
+ pb_log("couldn't create mount directory %s: %s\n",
+ ctx->mount_path, strerror(errno));
pid = fork();
if (pid == -1) {
pb_log("%s: fork failed: %s\n", __func__, strerror(errno));
- return -1;
+ goto out_rmdir;
}
if (pid == 0) {
exit(EXIT_FAILURE);
}
+ if (waitpid(pid, &status, 0) == -1) {
+ pb_log("%s: waitpid failed: %s\n", __func__,
+ strerror(errno));
+ goto out_rmdir;
+ }
+
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ goto out_rmdir;
+
+ setup_device_links(ctx);
+ return 0;
+
+out_rmdir:
+ rmdir_recursive(mount_base(), ctx->mount_path);
+ return -1;
+}
+
+static int umount_device(struct discover_context *ctx)
+{
+ int status;
+ pid_t pid;
+
+ remove_device_links(ctx);
+
+ pid = fork();
+ if (pid == -1) {
+ pb_log("%s: fork failed: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+
+ if (pid == 0) {
+ execl(UMOUNT_BIN, UMOUNT_BIN, ctx->mount_path, NULL);
+ exit(EXIT_FAILURE);
+ }
+
if (waitpid(pid, &status, 0) == -1) {
pb_log("%s: waitpid failed: %s\n", __func__,
strerror(errno));
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
return -1;
- setup_device_links(ctx);
+ rmdir_recursive(mount_base(), ctx->mount_path);
+
+ return 0;
+}
+
+static struct discover_context *find_context(struct device_handler *handler,
+ const char *id)
+{
+ struct discover_context *ctx;
+
+ list_for_each_entry(&handler->contexts, ctx, list) {
+ if (!strcmp(ctx->id, id))
+ return ctx;
+ }
+
+ return NULL;
+}
+
+
+static int destroy_context(void *arg)
+{
+ struct discover_context *ctx = arg;
+
+ list_remove(&ctx->list);
+ umount_device(ctx);
+
return 0;
}
int rc;
/* create our context */
- ctx = talloc(NULL, struct discover_context);
+ ctx = talloc(handler, struct discover_context);
ctx->event = event;
ctx->mount_path = NULL;
ctx->links = NULL;
ctx->n_links = 0;
+ ctx->id = talloc_strdup(ctx, event->device);
+
devname = udev_event_param(ctx->event, "DEVNAME");
if (!devname) {
pb_log("no devname for %s?\n", event->device);
return 0;
}
- talloc_free(ctx);
+ list_add(&handler->contexts, &ctx->list);
+
+ talloc_set_destructor(ctx, destroy_context);
return 0;
}
static int handle_remove_event(struct device_handler *handler,
struct udev_event *event)
{
+ struct discover_context *ctx;
+
+ ctx = find_context(handler, event->device);
+ if (!ctx)
+ return 0;
+
+ talloc_free(ctx);
+
return 0;
}
handler->devices = NULL;
handler->n_devices = 0;
+ list_init(&handler->contexts);
+
/* set up our mount point base */
mkdir_recursive(mount_base());
return handler;
}
-void device_handler_destroy(struct device_handler *devices)
+void device_handler_destroy(struct device_handler *handler)
{
- talloc_free(devices);
+ talloc_free(handler);
}