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core: merge branch 'th/prune-device-state-files'

Browse Source 
https://bugzilla.redhat.com/show_bug.cgi?id=1810153

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/429
This commit is contained in:
Thomas Haller
2020-03-04 16:57:54 +01:00
parent 627b543a37 332df7a58e
commit c5a6e07d07
4 changed files with 70 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
src/nm-config.c
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@@ -2299,6 +2299,8 @@ _config_device_state_data_new (int ifindex, GKeyFile *kf)
return device_state;
}
#define DEVICE_STATE_FILENAME_LEN_MAX 60
/**
* nm_config_device_state_load:
* @ifindex: the ifindex for which the state is to load
@@ -2310,7 +2312,7 @@ NMConfigDeviceStateData *
nm_config_device_state_load (int ifindex)
{
NMConfigDeviceStateData *device_state;
char path[NM_STRLEN (NM_CONFIG_DEVICE_STATE_DIR) + 60];
char path[NM_STRLEN (NM_CONFIG_DEVICE_STATE_DIR"/") + DEVICE_STATE_FILENAME_LEN_MAX + 1];
gs_unref_keyfile GKeyFile *kf = NULL;
const char *nm_owned_str;
@@ -2394,7 +2396,7 @@ nm_config_device_state_write (int ifindex,
const char *next_server,
const char *root_path)
{
char path[NM_STRLEN (NM_CONFIG_DEVICE_STATE_DIR) + 60];
char path[NM_STRLEN (NM_CONFIG_DEVICE_STATE_DIR"/") + DEVICE_STATE_FILENAME_LEN_MAX + 1];
GError *local = NULL;
gs_unref_keyfile GKeyFile *kf = NULL;
@@ -2477,35 +2479,43 @@ nm_config_device_state_write (int ifindex,
}
void
nm_config_device_state_prune_unseen (GHashTable *seen_ifindexes)
nm_config_device_state_prune_stale (GHashTable *preserve_ifindexes,
NMPlatform *preserve_in_platform)
{
GDir *dir;
const char *fn;
int ifindex;
gsize fn_len;
char buf[NM_STRLEN (NM_CONFIG_DEVICE_STATE_DIR"/") + 30 + 3] = NM_CONFIG_DEVICE_STATE_DIR"/";
char buf[NM_STRLEN (NM_CONFIG_DEVICE_STATE_DIR"/") + DEVICE_STATE_FILENAME_LEN_MAX + 1] = NM_CONFIG_DEVICE_STATE_DIR"/";
char *buf_p = &buf[NM_STRLEN (NM_CONFIG_DEVICE_STATE_DIR"/")];
g_return_if_fail (seen_ifindexes);
dir = g_dir_open (NM_CONFIG_DEVICE_STATE_DIR, 0, NULL);
if (!dir)
return;
while ((fn = g_dir_read_name (dir))) {
int ifindex;
gsize fn_len;
ifindex = _device_state_parse_filename (fn);
if (ifindex <= 0)
continue;
if (g_hash_table_contains (seen_ifindexes, GINT_TO_POINTER (ifindex)))
if ( preserve_ifindexes
&& g_hash_table_contains (preserve_ifindexes, GINT_TO_POINTER (ifindex)))
continue;
fn_len = strlen (fn) + 1;
if ( preserve_in_platform
&& nm_platform_link_get (preserve_in_platform, ifindex))
continue;
fn_len = strlen (fn);
nm_assert (fn_len > 0);
nm_assert (&buf_p[fn_len] < &buf[G_N_ELEMENTS (buf)]);
memcpy (buf_p, fn, fn_len);
memcpy (buf_p, fn, fn_len + 1u);
nm_assert (({
char bb[30];
nm_sprintf_buf (bb, "%d", ifindex);
nm_streq0 (bb, buf_p);
nm_streq0 (nm_sprintf_buf (bb, "%d", ifindex),
buf_p);
}));
_LOGT ("device-state: prune #%d (%s)", ifindex, buf);
(void) unlink (buf);

3
src/nm-config.h
View File

@@ -258,7 +258,8 @@ gboolean nm_config_device_state_write (int ifindex,
const char *next_server,
const char *root_path);
void nm_config_device_state_prune_unseen (GHashTable *seen_ifindexes);
void nm_config_device_state_prune_stale (GHashTable *preserve_ifindexes,
NMPlatform *preserve_in_platform);
const GHashTable *nm_config_device_state_get_all (NMConfig *self);
const NMConfigDeviceStateData *nm_config_device_state_get (NMConfig *self,

62
src/nm-manager.c
View File

@@ -50,6 +50,8 @@
#include "nm-dispatcher.h"
#include "NetworkManagerUtils.h"
#define DEVICE_STATE_PRUNE_RATELIMIT_MAX 100u
/*****************************************************************************/
typedef struct {
@@ -191,6 +193,8 @@ typedef struct {
NMConnectivityState connectivity_state;
guint8 device_state_prune_ratelimit_count;
bool startup:1;
bool devices_inited:1;
@@ -1515,8 +1519,22 @@ manager_device_state_changed (NMDevice *device,
if (NM_IN_SET (new_state,
NM_DEVICE_STATE_UNMANAGED,
NM_DEVICE_STATE_DISCONNECTED,
NM_DEVICE_STATE_ACTIVATED))
nm_manager_write_device_state (self, device);
NM_DEVICE_STATE_ACTIVATED)) {
nm_manager_write_device_state (self, device, NULL);
G_STATIC_ASSERT_EXPR (DEVICE_STATE_PRUNE_RATELIMIT_MAX < G_MAXUINT8);
if (priv->device_state_prune_ratelimit_count++ > DEVICE_STATE_PRUNE_RATELIMIT_MAX) {
/* We write the device state to /run. The state files are named after the
* ifindex (which is assumed to be unique and not repeat -- in practice
* it may repeat). So from time to time, we prune device state files
* for interfaces that no longer exist.
*
* Otherwise, the files might pile up if you create (and destroy) a large
* number of software devices. */
priv->device_state_prune_ratelimit_count = 0;
nm_config_device_state_prune_stale (NULL, priv->platform);
}
}
if (NM_IN_SET (new_state,
NM_DEVICE_STATE_UNAVAILABLE,
@@ -6484,7 +6502,7 @@ start_factory (NMDeviceFactory *factory, gpointer user_data)
}
gboolean
nm_manager_write_device_state (NMManager *self, NMDevice *device)
nm_manager_write_device_state (NMManager *self, NMDevice *device, int *out_ifindex)
{
NMManagerPrivate *priv = NM_MANAGER_GET_PRIVATE (self);
int ifindex;
@@ -6500,6 +6518,8 @@ nm_manager_write_device_state (NMManager *self, NMDevice *device)
const char *next_server = NULL;
const char *root_path = NULL;
NM_SET_OUT (out_ifindex, 0);
ifindex = nm_device_get_ip_ifindex (device);
if (ifindex <= 0)
return FALSE;
@@ -6540,34 +6560,40 @@ nm_manager_write_device_state (NMManager *self, NMDevice *device)
next_server = nm_dhcp_config_get_option (dhcp_config, "next_server");
}
return nm_config_device_state_write (ifindex,
managed_type,
perm_hw_addr_fake,
uuid,
nm_owned,
route_metric_default_aspired,
route_metric_default_effective,
next_server,
root_path);
if (!nm_config_device_state_write (ifindex,
managed_type,
perm_hw_addr_fake,
uuid,
nm_owned,
route_metric_default_aspired,
route_metric_default_effective,
next_server,
root_path))
return FALSE;
NM_SET_OUT (out_ifindex, ifindex);
return TRUE;
}
void
nm_manager_write_device_state_all (NMManager *self)
{
NMManagerPrivate *priv = NM_MANAGER_GET_PRIVATE (self);
gs_unref_hashtable GHashTable *seen_ifindexes = NULL;
gs_unref_hashtable GHashTable *preserve_ifindexes = NULL;
NMDevice *device;
seen_ifindexes = g_hash_table_new (nm_direct_hash, NULL);
preserve_ifindexes = g_hash_table_new (nm_direct_hash, NULL);
c_list_for_each_entry (device, &priv->devices_lst_head, devices_lst) {
if (nm_manager_write_device_state (self, device)) {
g_hash_table_add (seen_ifindexes,
GINT_TO_POINTER (nm_device_get_ip_ifindex (device)));
int ifindex;
if (nm_manager_write_device_state (self, device, &ifindex)) {
g_hash_table_add (preserve_ifindexes,
GINT_TO_POINTER (ifindex));
}
}
nm_config_device_state_prune_unseen (seen_ifindexes);
nm_config_device_state_prune_stale (preserve_ifindexes, NULL);
}
static gboolean

2
src/nm-manager.h
View File

@@ -103,7 +103,7 @@ NMSettingsConnection **nm_manager_get_activatable_connections (NMManager *manage
guint *out_len);
void nm_manager_write_device_state_all (NMManager *manager);
gboolean nm_manager_write_device_state (NMManager *manager, NMDevice *device);
gboolean nm_manager_write_device_state (NMManager *manager, NMDevice *device, int *out_ifindex);
/* Device handling */