void dm_report_field_set_value(struct dm_report_field *field, const void *value,
const void *sortvalue);
-
/*************************
* config file parse/print
*************************/
-// FIXME AGK Review this interface before inclusion in a release.
-enum {
- DM_CFG_STRING,
- DM_CFG_FLOAT,
+typedef enum {
DM_CFG_INT,
+ DM_CFG_FLOAT,
+ DM_CFG_STRING,
DM_CFG_EMPTY_ARRAY
-};
+} dm_config_value_type_t;
struct dm_config_value {
- int type;
+ dm_config_value_type_t type;
+
union {
int64_t i;
float f;
- double d; /* For completeness. (Unused.) */
+ double d; /* Unused. */
const char *str;
} v;
+
struct dm_config_value *next; /* For arrays */
};
struct dm_config_value *v;
};
-/* FIXME Move cascade to dm_config_node and remove this struct */
struct dm_config_tree {
struct dm_config_node *root;
struct dm_config_tree *cascade;
void dm_config_set_custom(struct dm_config_tree *cft, void *custom);
/*
- * If there's a cascaded dm_config_tree, remove the top layer
- * and return the layer below. Otherwise return NULL.
+ * When searching, first_cft is checked before second_cft.
*/
-struct dm_config_tree *dm_config_remove_cascaded_tree(struct dm_config_tree *cft);
+struct dm_config_tree *dm_config_insert_cascaded_tree(struct dm_config_tree *first_cft, struct dm_config_tree *second_cft);
/*
- * When searching, first_cft is checked before second_cft.
+ * If there's a cascaded dm_config_tree, remove the top layer
+ * and return the layer below. Otherwise return NULL.
*/
-struct dm_config_tree *dm_config_insert_cascaded_tree(struct dm_config_tree *first_cft, struct dm_config_tree *second_cft);
+struct dm_config_tree *dm_config_remove_cascaded_tree(struct dm_config_tree *cft);
void dm_config_destroy(struct dm_config_tree *cft);
typedef int (*dm_putline_fn)(const char *line, void *baton);
int dm_config_write_node(const struct dm_config_node *cn, dm_putline_fn putline, void *baton);
-struct dm_config_node *dm_config_find_node(struct dm_config_node *cn, const char *path);
+struct dm_config_node *dm_config_find_node(const struct dm_config_node *cn, const char *path);
int dm_config_has_node(const struct dm_config_node *cn, const char *path);
const char *dm_config_find_str(const struct dm_config_node *cn, const char *path, const char *fail);
const char *dm_config_find_str_allow_empty(const struct dm_config_node *cn, const char *path, const char *fail);
float dm_config_find_float(const struct dm_config_node *cn, const char *path, float fail);
const struct dm_config_node *dm_config_tree_find_node(const struct dm_config_tree *cft, const char *path);
-const char *dm_config_tree_find_str(const struct dm_config_tree *cft,
- const char *path, const char *fail);
-const char *dm_config_tree_find_str_allow_empty(const struct dm_config_tree *cft,
- const char *path, const char *fail);
-int dm_config_tree_find_int(const struct dm_config_tree *cft,
- const char *path, int fail);
-int64_t dm_config_tree_find_int64(const struct dm_config_tree *cft,
- const char *path, int64_t fail);
-float dm_config_tree_find_float(const struct dm_config_tree *cft,
- const char *path, float fail);
-int dm_config_tree_find_bool(const struct dm_config_tree *cft,
- const char *path, int fail);
+const char *dm_config_tree_find_str(const struct dm_config_tree *cft, const char *path, const char *fail);
+const char *dm_config_tree_find_str_allow_empty(const struct dm_config_tree *cft, const char *path, const char *fail);
+int dm_config_tree_find_int(const struct dm_config_tree *cft, const char *path, int fail);
+int64_t dm_config_tree_find_int64(const struct dm_config_tree *cft, const char *path, int64_t fail);
+float dm_config_tree_find_float(const struct dm_config_tree *cft, const char *path, float fail);
+int dm_config_tree_find_bool(const struct dm_config_tree *cft, const char *path, int fail);
/*
* Understands (0, ~0), (y, n), (yes, no), (on,
*/
int dm_config_find_bool(const struct dm_config_node *cn, const char *path, int fail);
-int dm_config_get_uint32(const struct dm_config_node *cn, const char *path,
- uint32_t *result);
-
-int dm_config_get_uint64(const struct dm_config_node *cn, const char *path,
- uint64_t *result);
-
-int dm_config_get_str(const struct dm_config_node *cn, const char *path,
- const char **result);
-int dm_config_get_list(const struct dm_config_node *cn, const char *path,
- const struct dm_config_value **result);
-int dm_config_get_section(const struct dm_config_node *cn, const char *path,
- const struct dm_config_node **result);
+int dm_config_get_uint32(const struct dm_config_node *cn, const char *path, uint32_t *result);
+int dm_config_get_uint64(const struct dm_config_node *cn, const char *path, uint64_t *result);
+int dm_config_get_str(const struct dm_config_node *cn, const char *path, const char **result);
+int dm_config_get_list(const struct dm_config_node *cn, const char *path, const struct dm_config_value **result);
+int dm_config_get_section(const struct dm_config_node *cn, const char *path, const struct dm_config_node **result);
unsigned dm_config_maybe_section(const char *str, unsigned len);
const char *dm_config_parent_name(const struct dm_config_node *n);
-struct dm_config_node *dm_config_clone_node_with_mem(struct dm_pool *mem,
- const struct dm_config_node *node,
- int siblings);
+struct dm_config_node *dm_config_clone_node_with_mem(struct dm_pool *mem, const struct dm_config_node *node, int siblings);
struct dm_config_node *dm_config_create_node(struct dm_config_tree *cft, const char *key);
struct dm_config_value *dm_config_create_value(struct dm_config_tree *cft);
-struct dm_config_node *dm_config_clone_node(struct dm_config_tree *cft,
- const struct dm_config_node *cn,
- int siblings);
+struct dm_config_node *dm_config_clone_node(struct dm_config_tree *cft, const struct dm_config_node *cn, int siblings);
struct dm_pool *dm_config_memory(struct dm_config_tree *cft);
-
/* Cookie prefixes.
+ *
* The cookie value consists of a prefix (16 bits) and a base (16 bits).
* We can use the prefix to store the flags. These flags are sent to
* kernel within given dm task. When returned back to userspace in
* of udev rules we use by decoding the cookie prefix. When doing the
* notification, we replace the cookie prefix with DM_COOKIE_MAGIC,
* so we notify the right semaphore.
+ *
* It is still possible to use cookies for passing the flags to udev
* rules even when udev_sync is disabled. The base part of the cookie
* will be zero (there's no notification semaphore) and prefix will be
uint32_t cookie;
};
+/*
+ * Tree functions.
+ */
struct dm_tree *dm_tree_create(void)
{
struct dm_pool *dmem;
dm_pool_destroy(dtree->mem);
}
+void dm_tree_set_cookie(struct dm_tree_node *node, uint32_t cookie)
+{
+ node->dtree->cookie = cookie;
+}
+
+uint32_t dm_tree_get_cookie(struct dm_tree_node *node)
+{
+ return node->dtree->cookie;
+}
+
+void dm_tree_skip_lockfs(struct dm_tree_node *dnode)
+{
+ dnode->dtree->skip_lockfs = 1;
+}
+
+void dm_tree_use_no_flush_suspend(struct dm_tree_node *dnode)
+{
+ dnode->dtree->no_flush = 1;
+}
+
+void dm_tree_retry_remove(struct dm_tree_node *dnode)
+{
+ dnode->dtree->retry_remove = 1;
+}
+
+/*
+ * Node functions.
+ */
static int _nodes_are_linked(const struct dm_tree_node *parent,
const struct dm_tree_node *child)
{
return dm_hash_lookup(dtree->uuids, uuid + default_uuid_prefix_len);
}
+void dm_tree_node_set_udev_flags(struct dm_tree_node *dnode, uint16_t udev_flags)
+
+{
+ struct dm_info *dinfo = &dnode->info;
+
+ if (udev_flags != dnode->udev_flags)
+ log_debug("Resetting %s (%" PRIu32 ":%" PRIu32
+ ") udev_flags from 0x%x to 0x%x",
+ dnode->name, dinfo->major, dinfo->minor,
+ dnode->udev_flags, udev_flags);
+ dnode->udev_flags = udev_flags;
+}
+
+void dm_tree_node_set_read_ahead(struct dm_tree_node *dnode,
+ uint32_t read_ahead,
+ uint32_t read_ahead_flags)
+{
+ dnode->props.read_ahead = read_ahead;
+ dnode->props.read_ahead_flags = read_ahead_flags;
+}
+
+void dm_tree_node_set_presuspend_node(struct dm_tree_node *node,
+ struct dm_tree_node *presuspend_node)
+{
+ node->presuspend_node = presuspend_node;
+}
+
+const char *dm_tree_node_get_name(const struct dm_tree_node *node)
+{
+ return node->info.exists ? node->name : "";
+}
+
+const char *dm_tree_node_get_uuid(const struct dm_tree_node *node)
+{
+ return node->info.exists ? node->uuid : "";
+}
+
+const struct dm_info *dm_tree_node_get_info(const struct dm_tree_node *node)
+{
+ return &node->info;
+}
+
+void *dm_tree_node_get_context(const struct dm_tree_node *node)
+{
+ return node->context;
+}
+
+int dm_tree_node_size_changed(const struct dm_tree_node *dnode)
+{
+ return dnode->props.size_changed;
+}
+
+int dm_tree_node_num_children(const struct dm_tree_node *node, uint32_t inverted)
+{
+ if (inverted) {
+ if (_nodes_are_linked(&node->dtree->root, node))
+ return 0;
+ return dm_list_size(&node->used_by);
+ }
+
+ if (_nodes_are_linked(node, &node->dtree->root))
+ return 0;
+
+ return dm_list_size(&node->uses);
+}
+
+/*
+ * Returns 1 if no prefix supplied
+ */
+static int _uuid_prefix_matches(const char *uuid, const char *uuid_prefix, size_t uuid_prefix_len)
+{
+ const char *default_uuid_prefix = dm_uuid_prefix();
+ size_t default_uuid_prefix_len = strlen(default_uuid_prefix);
+
+ if (!uuid_prefix)
+ return 1;
+
+ if (!strncmp(uuid, uuid_prefix, uuid_prefix_len))
+ return 1;
+
+ /* Handle transition: active device uuids might be missing the prefix */
+ if (uuid_prefix_len <= 4)
+ return 0;
+
+ if (!strncmp(uuid, default_uuid_prefix, default_uuid_prefix_len))
+ return 0;
+
+ if (strncmp(uuid_prefix, default_uuid_prefix, default_uuid_prefix_len))
+ return 0;
+
+ if (!strncmp(uuid, uuid_prefix + default_uuid_prefix_len, uuid_prefix_len - default_uuid_prefix_len))
+ return 1;
+
+ return 0;
+}
+
+/*
+ * Returns 1 if no children.
+ */
+static int _children_suspended(struct dm_tree_node *node,
+ uint32_t inverted,
+ const char *uuid_prefix,
+ size_t uuid_prefix_len)
+{
+ struct dm_list *list;
+ struct dm_tree_link *dlink;
+ const struct dm_info *dinfo;
+ const char *uuid;
+
+ if (inverted) {
+ if (_nodes_are_linked(&node->dtree->root, node))
+ return 1;
+ list = &node->used_by;
+ } else {
+ if (_nodes_are_linked(node, &node->dtree->root))
+ return 1;
+ list = &node->uses;
+ }
+
+ dm_list_iterate_items(dlink, list) {
+ if (!(uuid = dm_tree_node_get_uuid(dlink->node))) {
+ stack;
+ continue;
+ }
+
+ /* Ignore if it doesn't belong to this VG */
+ if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
+ continue;
+
+ /* Ignore if parent node wants to presuspend this node */
+ if (dlink->node->presuspend_node == node)
+ continue;
+
+ if (!(dinfo = dm_tree_node_get_info(dlink->node))) {
+ stack; /* FIXME Is this normal? */
+ return 0;
+ }
+
+ if (!dinfo->suspended)
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * Set major and minor to zero for root of tree.
+ */
+struct dm_tree_node *dm_tree_find_node(struct dm_tree *dtree,
+ uint32_t major,
+ uint32_t minor)
+{
+ if (!major && !minor)
+ return &dtree->root;
+
+ return _find_dm_tree_node(dtree, major, minor);
+}
+
+/*
+ * Set uuid to NULL for root of tree.
+ */
+struct dm_tree_node *dm_tree_find_node_by_uuid(struct dm_tree *dtree,
+ const char *uuid)
+{
+ if (!uuid || !*uuid)
+ return &dtree->root;
+
+ return _find_dm_tree_node_by_uuid(dtree, uuid);
+}
+
+/*
+ * First time set *handle to NULL.
+ * Set inverted to invert the tree.
+ */
+struct dm_tree_node *dm_tree_next_child(void **handle,
+ const struct dm_tree_node *parent,
+ uint32_t inverted)
+{
+ struct dm_list **dlink = (struct dm_list **) handle;
+ const struct dm_list *use_list;
+
+ if (inverted)
+ use_list = &parent->used_by;
+ else
+ use_list = &parent->uses;
+
+ if (!*dlink)
+ *dlink = dm_list_first(use_list);
+ else
+ *dlink = dm_list_next(use_list, *dlink);
+
+ return (*dlink) ? dm_list_item(*dlink, struct dm_tree_link)->node : NULL;
+}
+
static int _deps(struct dm_task **dmt, struct dm_pool *mem, uint32_t major, uint32_t minor,
const char **name, const char **uuid, unsigned inactive_table,
struct dm_info *info, struct dm_deps **deps)
return 0;
}
-static struct dm_tree_node *_add_dev(struct dm_tree *dtree,
- struct dm_tree_node *parent,
- uint32_t major, uint32_t minor,
- uint16_t udev_flags)
+/*
+ * Deactivate a device with its dependencies if the uuid prefix matches.
+ */
+static int _info_by_dev(uint32_t major, uint32_t minor, int with_open_count,
+ struct dm_info *info, struct dm_pool *mem,
+ const char **name, const char **uuid)
{
- struct dm_task *dmt = NULL;
- struct dm_info info;
- struct dm_deps *deps = NULL;
- const char *name = NULL;
- const char *uuid = NULL;
- struct dm_tree_node *node = NULL;
- uint32_t i;
- int new = 0;
-
- /* Already in tree? */
- if (!(node = _find_dm_tree_node(dtree, major, minor))) {
- if (!_deps(&dmt, dtree->mem, major, minor, &name, &uuid, 0, &info, &deps))
- return_NULL;
+ struct dm_task *dmt;
+ int r;
- if (!(node = _create_dm_tree_node(dtree, name, uuid, &info,
- NULL, udev_flags)))
- goto_out;
- new = 1;
+ if (!(dmt = dm_task_create(DM_DEVICE_INFO))) {
+ log_error("_info_by_dev: dm_task creation failed");
+ return 0;
}
- if (!_link_tree_nodes(parent, node)) {
- node = NULL;
+ if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
+ log_error("_info_by_dev: Failed to set device number");
+ dm_task_destroy(dmt);
+ return 0;
+ }
+
+ if (!with_open_count && !dm_task_no_open_count(dmt))
+ log_error("Failed to disable open_count");
+
+ if (!(r = dm_task_run(dmt)))
+ goto_out;
+
+ if (!(r = dm_task_get_info(dmt, info)))
+ goto_out;
+
+ if (name && !(*name = dm_pool_strdup(mem, dm_task_get_name(dmt)))) {
+ log_error("name pool_strdup failed");
+ r = 0;
goto_out;
}
- /* If node was already in tree, no need to recurse. */
- if (!new)
- goto out;
+ if (uuid && !(*uuid = dm_pool_strdup(mem, dm_task_get_uuid(dmt)))) {
+ log_error("uuid pool_strdup failed");
+ r = 0;
+ goto_out;
+ }
- /* Can't recurse if not a mapped device or there are no dependencies */
- if (!node->info.exists || !deps->count) {
- if (!_add_to_bottomlevel(node)) {
+out:
+ dm_task_destroy(dmt);
+
+ return r;
+}
+
+static int _check_device_not_in_use(const char *name, struct dm_info *info)
+{
+ if (!info->exists)
+ return 1;
+
+ /* If sysfs is not used, use open_count information only. */
+ if (!*dm_sysfs_dir()) {
+ if (info->open_count) {
+ log_error("Device %s (%" PRIu32 ":%" PRIu32 ") in use",
+ name, info->major, info->minor);
+ return 0;
+ }
+
+ return 1;
+ }
+
+ if (dm_device_has_holders(info->major, info->minor)) {
+ log_error("Device %s (%" PRIu32 ":%" PRIu32 ") is used "
+ "by another device.", name, info->major, info->minor);
+ return 0;
+ }
+
+ if (dm_device_has_mounted_fs(info->major, info->minor)) {
+ log_error("Device %s (%" PRIu32 ":%" PRIu32 ") contains "
+ "a filesystem in use.", name, info->major, info->minor);
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Check if all parent nodes of given node have open_count == 0 */
+static int _node_has_closed_parents(struct dm_tree_node *node,
+ const char *uuid_prefix,
+ size_t uuid_prefix_len)
+{
+ struct dm_tree_link *dlink;
+ const struct dm_info *dinfo;
+ struct dm_info info;
+ const char *uuid;
+
+ /* Iterate through parents of this node */
+ dm_list_iterate_items(dlink, &node->used_by) {
+ if (!(uuid = dm_tree_node_get_uuid(dlink->node))) {
stack;
- node = NULL;
+ continue;
}
+
+ /* Ignore if it doesn't belong to this VG */
+ if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
+ continue;
+
+ if (!(dinfo = dm_tree_node_get_info(dlink->node))) {
+ stack; /* FIXME Is this normal? */
+ return 0;
+ }
+
+ /* Refresh open_count */
+ if (!_info_by_dev(dinfo->major, dinfo->minor, 1, &info, NULL, NULL, NULL) ||
+ !info.exists)
+ continue;
+
+ if (info.open_count) {
+ log_debug("Node %s %d:%d has open_count %d", uuid_prefix,
+ dinfo->major, dinfo->minor, info.open_count);
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static int _deactivate_node(const char *name, uint32_t major, uint32_t minor,
+ uint32_t *cookie, uint16_t udev_flags, int retry)
+{
+ struct dm_task *dmt;
+ int r = 0;
+
+ log_verbose("Removing %s (%" PRIu32 ":%" PRIu32 ")", name, major, minor);
+
+ if (!(dmt = dm_task_create(DM_DEVICE_REMOVE))) {
+ log_error("Deactivation dm_task creation failed for %s", name);
+ return 0;
+ }
+
+ if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
+ log_error("Failed to set device number for %s deactivation", name);
goto out;
}
- /* Add dependencies to tree */
- for (i = 0; i < deps->count; i++)
- if (!_add_dev(dtree, node, MAJOR(deps->device[i]),
- MINOR(deps->device[i]), udev_flags)) {
- node = NULL;
- goto_out;
- }
+ if (!dm_task_no_open_count(dmt))
+ log_error("Failed to disable open_count");
+
+ if (cookie)
+ if (!dm_task_set_cookie(dmt, cookie, udev_flags))
+ goto out;
+
+ if (retry)
+ dm_task_retry_remove(dmt);
+
+ r = dm_task_run(dmt);
+
+ /* FIXME Until kernel returns actual name so dm-iface.c can handle it */
+ rm_dev_node(name, dmt->cookie_set && !(udev_flags & DM_UDEV_DISABLE_DM_RULES_FLAG),
+ dmt->cookie_set && (udev_flags & DM_UDEV_DISABLE_LIBRARY_FALLBACK));
+
+ /* FIXME Remove node from tree or mark invalid? */
out:
- if (dmt)
- dm_task_destroy(dmt);
+ dm_task_destroy(dmt);
- return node;
+ return r;
}
-// FIXME Move fn group down.
-static int _info_by_dev(uint32_t major, uint32_t minor, int with_open_count,
- struct dm_info *info, struct dm_pool *mem,
- const char **name, const char **uuid);
-static int _deactivate_node(const char *name, uint32_t major, uint32_t minor,
- uint32_t *cookie, uint16_t udev_flags, int retry);
static int _node_clear_table(struct dm_tree_node *dnode, uint16_t udev_flags)
{
struct dm_task *dmt = NULL, *deps_dmt = NULL;
for (i = 0; i < deps->count; i++) {
/* If already in tree, assume it's under control */
if (_find_dm_tree_node(dnode->dtree, MAJOR(deps->device[i]), MINOR(deps->device[i])))
- continue;
-
- if (!_info_by_dev(MAJOR(deps->device[i]), MINOR(deps->device[i]), 1,
- &deps_info, dnode->dtree->mem, &name, &uuid))
- continue;
-
- /* Proceed if device is an 'orphan' - unreferenced and without a live table. */
- if (!deps_info.exists || deps_info.live_table || deps_info.open_count)
- continue;
-
- if (strncmp(uuid, default_uuid_prefix, default_uuid_prefix_len))
- continue;
-
- /* Remove device. */
- if (!_deactivate_node(name, deps_info.major, deps_info.minor, &dnode->dtree->cookie, udev_flags, 0)) {
- log_error("Failed to deactivate no-longer-used device %s (%"
- PRIu32 ":%" PRIu32 ")", name, deps_info.major, deps_info.minor);
- } else if (deps_info.suspended)
- dec_suspended();
- }
-
-out:
- if (dmt)
- dm_task_destroy(dmt);
-
- if (deps_dmt)
- dm_task_destroy(deps_dmt);
-
- return r;
-}
-
-struct dm_tree_node *dm_tree_add_new_dev_with_udev_flags(struct dm_tree *dtree,
- const char *name,
- const char *uuid,
- uint32_t major,
- uint32_t minor,
- int read_only,
- int clear_inactive,
- void *context,
- uint16_t udev_flags)
-{
- struct dm_tree_node *dnode;
- struct dm_info info;
- const char *name2;
- const char *uuid2;
-
- /* Do we need to add node to tree? */
- if (!(dnode = dm_tree_find_node_by_uuid(dtree, uuid))) {
- if (!(name2 = dm_pool_strdup(dtree->mem, name))) {
- log_error("name pool_strdup failed");
- return NULL;
- }
- if (!(uuid2 = dm_pool_strdup(dtree->mem, uuid))) {
- log_error("uuid pool_strdup failed");
- return NULL;
- }
-
- info.major = 0;
- info.minor = 0;
- info.exists = 0;
- info.live_table = 0;
- info.inactive_table = 0;
- info.read_only = 0;
-
- if (!(dnode = _create_dm_tree_node(dtree, name2, uuid2, &info,
- context, 0)))
- return_NULL;
-
- /* Attach to root node until a table is supplied */
- if (!_add_to_toplevel(dnode) || !_add_to_bottomlevel(dnode))
- return_NULL;
-
- dnode->props.major = major;
- dnode->props.minor = minor;
- dnode->props.new_name = NULL;
- dnode->props.size_changed = 0;
- } else if (strcmp(name, dnode->name)) {
- /* Do we need to rename node? */
- if (!(dnode->props.new_name = dm_pool_strdup(dtree->mem, name))) {
- log_error("name pool_strdup failed");
- return NULL;
- }
- }
-
- dnode->props.read_only = read_only ? 1 : 0;
- dnode->props.read_ahead = DM_READ_AHEAD_AUTO;
- dnode->props.read_ahead_flags = 0;
-
- if (clear_inactive && !_node_clear_table(dnode, udev_flags))
- return_NULL;
-
- dnode->context = context;
- dnode->udev_flags = udev_flags;
-
- return dnode;
-}
-
-struct dm_tree_node *dm_tree_add_new_dev(struct dm_tree *dtree, const char *name,
- const char *uuid, uint32_t major, uint32_t minor,
- int read_only, int clear_inactive, void *context)
-{
- return dm_tree_add_new_dev_with_udev_flags(dtree, name, uuid, major, minor,
- read_only, clear_inactive, context, 0);
-}
-
-void dm_tree_node_set_udev_flags(struct dm_tree_node *dnode, uint16_t udev_flags)
-
-{
- struct dm_info *dinfo = &dnode->info;
-
- if (udev_flags != dnode->udev_flags)
- log_debug("Resetting %s (%" PRIu32 ":%" PRIu32
- ") udev_flags from 0x%x to 0x%x",
- dnode->name, dinfo->major, dinfo->minor,
- dnode->udev_flags, udev_flags);
- dnode->udev_flags = udev_flags;
-}
-
-void dm_tree_node_set_read_ahead(struct dm_tree_node *dnode,
- uint32_t read_ahead,
- uint32_t read_ahead_flags)
-{
- dnode->props.read_ahead = read_ahead;
- dnode->props.read_ahead_flags = read_ahead_flags;
-}
-
-void dm_tree_node_set_presuspend_node(struct dm_tree_node *node,
- struct dm_tree_node *presuspend_node)
-{
- node->presuspend_node = presuspend_node;
-}
-
-int dm_tree_add_dev(struct dm_tree *dtree, uint32_t major, uint32_t minor)
-{
- return _add_dev(dtree, &dtree->root, major, minor, 0) ? 1 : 0;
-}
-
-int dm_tree_add_dev_with_udev_flags(struct dm_tree *dtree, uint32_t major,
- uint32_t minor, uint16_t udev_flags)
-{
- return _add_dev(dtree, &dtree->root, major, minor, udev_flags) ? 1 : 0;
-}
-
-const char *dm_tree_node_get_name(const struct dm_tree_node *node)
-{
- return node->info.exists ? node->name : "";
-}
-
-const char *dm_tree_node_get_uuid(const struct dm_tree_node *node)
-{
- return node->info.exists ? node->uuid : "";
-}
-
-const struct dm_info *dm_tree_node_get_info(const struct dm_tree_node *node)
-{
- return &node->info;
-}
-
-void *dm_tree_node_get_context(const struct dm_tree_node *node)
-{
- return node->context;
-}
-
-int dm_tree_node_size_changed(const struct dm_tree_node *dnode)
-{
- return dnode->props.size_changed;
-}
-
-int dm_tree_node_num_children(const struct dm_tree_node *node, uint32_t inverted)
-{
- if (inverted) {
- if (_nodes_are_linked(&node->dtree->root, node))
- return 0;
- return dm_list_size(&node->used_by);
- }
-
- if (_nodes_are_linked(node, &node->dtree->root))
- return 0;
-
- return dm_list_size(&node->uses);
-}
-
-/*
- * Returns 1 if no prefix supplied
- */
-static int _uuid_prefix_matches(const char *uuid, const char *uuid_prefix, size_t uuid_prefix_len)
-{
- const char *default_uuid_prefix = dm_uuid_prefix();
- size_t default_uuid_prefix_len = strlen(default_uuid_prefix);
-
- if (!uuid_prefix)
- return 1;
-
- if (!strncmp(uuid, uuid_prefix, uuid_prefix_len))
- return 1;
-
- /* Handle transition: active device uuids might be missing the prefix */
- if (uuid_prefix_len <= 4)
- return 0;
-
- if (!strncmp(uuid, default_uuid_prefix, default_uuid_prefix_len))
- return 0;
-
- if (strncmp(uuid_prefix, default_uuid_prefix, default_uuid_prefix_len))
- return 0;
-
- if (!strncmp(uuid, uuid_prefix + default_uuid_prefix_len, uuid_prefix_len - default_uuid_prefix_len))
- return 1;
-
- return 0;
-}
-
-/*
- * Returns 1 if no children.
- */
-static int _children_suspended(struct dm_tree_node *node,
- uint32_t inverted,
- const char *uuid_prefix,
- size_t uuid_prefix_len)
-{
- struct dm_list *list;
- struct dm_tree_link *dlink;
- const struct dm_info *dinfo;
- const char *uuid;
-
- if (inverted) {
- if (_nodes_are_linked(&node->dtree->root, node))
- return 1;
- list = &node->used_by;
- } else {
- if (_nodes_are_linked(node, &node->dtree->root))
- return 1;
- list = &node->uses;
- }
-
- dm_list_iterate_items(dlink, list) {
- if (!(uuid = dm_tree_node_get_uuid(dlink->node))) {
- stack;
- continue;
- }
-
- /* Ignore if it doesn't belong to this VG */
- if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
- continue;
-
- /* Ignore if parent node wants to presuspend this node */
- if (dlink->node->presuspend_node == node)
- continue;
-
- if (!(dinfo = dm_tree_node_get_info(dlink->node))) {
- stack; /* FIXME Is this normal? */
- return 0;
- }
-
- if (!dinfo->suspended)
- return 0;
- }
-
- return 1;
-}
-
-/*
- * Set major and minor to zero for root of tree.
- */
-struct dm_tree_node *dm_tree_find_node(struct dm_tree *dtree,
- uint32_t major,
- uint32_t minor)
-{
- if (!major && !minor)
- return &dtree->root;
-
- return _find_dm_tree_node(dtree, major, minor);
-}
-
-/*
- * Set uuid to NULL for root of tree.
- */
-struct dm_tree_node *dm_tree_find_node_by_uuid(struct dm_tree *dtree,
- const char *uuid)
-{
- if (!uuid || !*uuid)
- return &dtree->root;
-
- return _find_dm_tree_node_by_uuid(dtree, uuid);
-}
-
-/*
- * First time set *handle to NULL.
- * Set inverted to invert the tree.
- */
-struct dm_tree_node *dm_tree_next_child(void **handle,
- const struct dm_tree_node *parent,
- uint32_t inverted)
-{
- struct dm_list **dlink = (struct dm_list **) handle;
- const struct dm_list *use_list;
-
- if (inverted)
- use_list = &parent->used_by;
- else
- use_list = &parent->uses;
-
- if (!*dlink)
- *dlink = dm_list_first(use_list);
- else
- *dlink = dm_list_next(use_list, *dlink);
-
- return (*dlink) ? dm_list_item(*dlink, struct dm_tree_link)->node : NULL;
-}
-
-/*
- * Deactivate a device with its dependencies if the uuid prefix matches.
- */
-static int _info_by_dev(uint32_t major, uint32_t minor, int with_open_count,
- struct dm_info *info, struct dm_pool *mem,
- const char **name, const char **uuid)
-{
- struct dm_task *dmt;
- int r;
-
- if (!(dmt = dm_task_create(DM_DEVICE_INFO))) {
- log_error("_info_by_dev: dm_task creation failed");
- return 0;
- }
-
- if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
- log_error("_info_by_dev: Failed to set device number");
- dm_task_destroy(dmt);
- return 0;
- }
-
- if (!with_open_count && !dm_task_no_open_count(dmt))
- log_error("Failed to disable open_count");
+ continue;
- if (!(r = dm_task_run(dmt)))
- goto_out;
+ if (!_info_by_dev(MAJOR(deps->device[i]), MINOR(deps->device[i]), 1,
+ &deps_info, dnode->dtree->mem, &name, &uuid))
+ continue;
- if (!(r = dm_task_get_info(dmt, info)))
- goto_out;
+ /* Proceed if device is an 'orphan' - unreferenced and without a live table. */
+ if (!deps_info.exists || deps_info.live_table || deps_info.open_count)
+ continue;
- if (name && !(*name = dm_pool_strdup(mem, dm_task_get_name(dmt)))) {
- log_error("name pool_strdup failed");
- r = 0;
- goto_out;
- }
+ if (strncmp(uuid, default_uuid_prefix, default_uuid_prefix_len))
+ continue;
- if (uuid && !(*uuid = dm_pool_strdup(mem, dm_task_get_uuid(dmt)))) {
- log_error("uuid pool_strdup failed");
- r = 0;
- goto_out;
+ /* Remove device. */
+ if (!_deactivate_node(name, deps_info.major, deps_info.minor, &dnode->dtree->cookie, udev_flags, 0)) {
+ log_error("Failed to deactivate no-longer-used device %s (%"
+ PRIu32 ":%" PRIu32 ")", name, deps_info.major, deps_info.minor);
+ } else if (deps_info.suspended)
+ dec_suspended();
}
out:
- dm_task_destroy(dmt);
+ if (dmt)
+ dm_task_destroy(dmt);
+
+ if (deps_dmt)
+ dm_task_destroy(deps_dmt);
return r;
}
-static int _check_device_not_in_use(const char *name, struct dm_info *info)
+struct dm_tree_node *dm_tree_add_new_dev_with_udev_flags(struct dm_tree *dtree,
+ const char *name,
+ const char *uuid,
+ uint32_t major,
+ uint32_t minor,
+ int read_only,
+ int clear_inactive,
+ void *context,
+ uint16_t udev_flags)
{
- if (!info->exists)
- return 1;
+ struct dm_tree_node *dnode;
+ struct dm_info info;
+ const char *name2;
+ const char *uuid2;
- /* If sysfs is not used, use open_count information only. */
- if (!*dm_sysfs_dir()) {
- if (info->open_count) {
- log_error("Device %s (%" PRIu32 ":%" PRIu32 ") in use",
- name, info->major, info->minor);
- return 0;
+ /* Do we need to add node to tree? */
+ if (!(dnode = dm_tree_find_node_by_uuid(dtree, uuid))) {
+ if (!(name2 = dm_pool_strdup(dtree->mem, name))) {
+ log_error("name pool_strdup failed");
+ return NULL;
+ }
+ if (!(uuid2 = dm_pool_strdup(dtree->mem, uuid))) {
+ log_error("uuid pool_strdup failed");
+ return NULL;
}
- return 1;
- }
-
- if (dm_device_has_holders(info->major, info->minor)) {
- log_error("Device %s (%" PRIu32 ":%" PRIu32 ") is used "
- "by another device.", name, info->major, info->minor);
- return 0;
- }
-
- if (dm_device_has_mounted_fs(info->major, info->minor)) {
- log_error("Device %s (%" PRIu32 ":%" PRIu32 ") contains "
- "a filesystem in use.", name, info->major, info->minor);
- return 0;
- }
+ info.major = 0;
+ info.minor = 0;
+ info.exists = 0;
+ info.live_table = 0;
+ info.inactive_table = 0;
+ info.read_only = 0;
- return 1;
-}
+ if (!(dnode = _create_dm_tree_node(dtree, name2, uuid2, &info,
+ context, 0)))
+ return_NULL;
-/* Check if all parent nodes of given node have open_count == 0 */
-static int _node_has_closed_parents(struct dm_tree_node *node,
- const char *uuid_prefix,
- size_t uuid_prefix_len)
-{
- struct dm_tree_link *dlink;
- const struct dm_info *dinfo;
- struct dm_info info;
- const char *uuid;
+ /* Attach to root node until a table is supplied */
+ if (!_add_to_toplevel(dnode) || !_add_to_bottomlevel(dnode))
+ return_NULL;
- /* Iterate through parents of this node */
- dm_list_iterate_items(dlink, &node->used_by) {
- if (!(uuid = dm_tree_node_get_uuid(dlink->node))) {
- stack;
- continue;
+ dnode->props.major = major;
+ dnode->props.minor = minor;
+ dnode->props.new_name = NULL;
+ dnode->props.size_changed = 0;
+ } else if (strcmp(name, dnode->name)) {
+ /* Do we need to rename node? */
+ if (!(dnode->props.new_name = dm_pool_strdup(dtree->mem, name))) {
+ log_error("name pool_strdup failed");
+ return NULL;
}
+ }
- /* Ignore if it doesn't belong to this VG */
- if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
- continue;
+ dnode->props.read_only = read_only ? 1 : 0;
+ dnode->props.read_ahead = DM_READ_AHEAD_AUTO;
+ dnode->props.read_ahead_flags = 0;
- if (!(dinfo = dm_tree_node_get_info(dlink->node))) {
- stack; /* FIXME Is this normal? */
- return 0;
- }
+ if (clear_inactive && !_node_clear_table(dnode, udev_flags))
+ return_NULL;
- /* Refresh open_count */
- if (!_info_by_dev(dinfo->major, dinfo->minor, 1, &info, NULL, NULL, NULL) ||
- !info.exists)
- continue;
+ dnode->context = context;
+ dnode->udev_flags = udev_flags;
- if (info.open_count) {
- log_debug("Node %s %d:%d has open_count %d", uuid_prefix,
- dinfo->major, dinfo->minor, info.open_count);
- return 0;
- }
- }
+ return dnode;
+}
- return 1;
+struct dm_tree_node *dm_tree_add_new_dev(struct dm_tree *dtree, const char *name,
+ const char *uuid, uint32_t major, uint32_t minor,
+ int read_only, int clear_inactive, void *context)
+{
+ return dm_tree_add_new_dev_with_udev_flags(dtree, name, uuid, major, minor,
+ read_only, clear_inactive, context, 0);
}
-static int _deactivate_node(const char *name, uint32_t major, uint32_t minor,
- uint32_t *cookie, uint16_t udev_flags, int retry)
+static struct dm_tree_node *_add_dev(struct dm_tree *dtree,
+ struct dm_tree_node *parent,
+ uint32_t major, uint32_t minor,
+ uint16_t udev_flags)
{
- struct dm_task *dmt;
- int r = 0;
+ struct dm_task *dmt = NULL;
+ struct dm_info info;
+ struct dm_deps *deps = NULL;
+ const char *name = NULL;
+ const char *uuid = NULL;
+ struct dm_tree_node *node = NULL;
+ uint32_t i;
+ int new = 0;
- log_verbose("Removing %s (%" PRIu32 ":%" PRIu32 ")", name, major, minor);
+ /* Already in tree? */
+ if (!(node = _find_dm_tree_node(dtree, major, minor))) {
+ if (!_deps(&dmt, dtree->mem, major, minor, &name, &uuid, 0, &info, &deps))
+ return_NULL;
- if (!(dmt = dm_task_create(DM_DEVICE_REMOVE))) {
- log_error("Deactivation dm_task creation failed for %s", name);
- return 0;
+ if (!(node = _create_dm_tree_node(dtree, name, uuid, &info,
+ NULL, udev_flags)))
+ goto_out;
+ new = 1;
}
- if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
- log_error("Failed to set device number for %s deactivation", name);
- goto out;
+ if (!_link_tree_nodes(parent, node)) {
+ node = NULL;
+ goto_out;
}
- if (!dm_task_no_open_count(dmt))
- log_error("Failed to disable open_count");
-
- if (cookie)
- if (!dm_task_set_cookie(dmt, cookie, udev_flags))
- goto out;
+ /* If node was already in tree, no need to recurse. */
+ if (!new)
+ goto out;
- if (retry)
- dm_task_retry_remove(dmt);
+ /* Can't recurse if not a mapped device or there are no dependencies */
+ if (!node->info.exists || !deps->count) {
+ if (!_add_to_bottomlevel(node)) {
+ stack;
+ node = NULL;
+ }
+ goto out;
+ }
- r = dm_task_run(dmt);
+ /* Add dependencies to tree */
+ for (i = 0; i < deps->count; i++)
+ if (!_add_dev(dtree, node, MAJOR(deps->device[i]),
+ MINOR(deps->device[i]), udev_flags)) {
+ node = NULL;
+ goto_out;
+ }
- /* FIXME Until kernel returns actual name so dm-iface.c can handle it */
- rm_dev_node(name, dmt->cookie_set && !(udev_flags & DM_UDEV_DISABLE_DM_RULES_FLAG),
- dmt->cookie_set && (udev_flags & DM_UDEV_DISABLE_LIBRARY_FALLBACK));
+out:
+ if (dmt)
+ dm_task_destroy(dmt);
- /* FIXME Remove node from tree or mark invalid? */
+ return node;
+}
-out:
- dm_task_destroy(dmt);
+int dm_tree_add_dev(struct dm_tree *dtree, uint32_t major, uint32_t minor)
+{
+ return _add_dev(dtree, &dtree->root, major, minor, 0) ? 1 : 0;
+}
- return r;
+int dm_tree_add_dev_with_udev_flags(struct dm_tree *dtree, uint32_t major,
+ uint32_t minor, uint16_t udev_flags)
+{
+ return _add_dev(dtree, &dtree->root, major, minor, udev_flags) ? 1 : 0;
}
static int _rename_node(const char *old_name, const char *new_name, uint32_t major,
return _dm_tree_deactivate_children(dnode, uuid_prefix, uuid_prefix_len, 0);
}
-void dm_tree_skip_lockfs(struct dm_tree_node *dnode)
-{
- dnode->dtree->skip_lockfs = 1;
-}
-
-void dm_tree_use_no_flush_suspend(struct dm_tree_node *dnode)
-{
- dnode->dtree->no_flush = 1;
-}
-
-void dm_tree_retry_remove(struct dm_tree_node *dnode)
-{
- dnode->dtree->retry_remove = 1;
-}
-
int dm_tree_suspend_children(struct dm_tree_node *dnode,
const char *uuid_prefix,
size_t uuid_prefix_len)
return 1;
}
-
-void dm_tree_set_cookie(struct dm_tree_node *node, uint32_t cookie)
-{
- node->dtree->cookie = cookie;
-}
-
-uint32_t dm_tree_get_cookie(struct dm_tree_node *node)
-{
- return node->dtree->cookie;
-}
git://sourceware.org / lvm2.git / commitdiff