From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- fs/ocfs2/cluster/nodemanager.c | 867 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 867 insertions(+) create mode 100644 fs/ocfs2/cluster/nodemanager.c (limited to 'fs/ocfs2/cluster/nodemanager.c') diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c new file mode 100644 index 000000000..2f61d39e4 --- /dev/null +++ b/fs/ocfs2/cluster/nodemanager.c @@ -0,0 +1,867 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2004, 2005 Oracle. All rights reserved. + */ + +#include +#include +#include +#include + +#include "tcp.h" +#include "nodemanager.h" +#include "heartbeat.h" +#include "masklog.h" +#include "sys.h" + +/* for now we operate under the assertion that there can be only one + * cluster active at a time. Changing this will require trickling + * cluster references throughout where nodes are looked up */ +struct o2nm_cluster *o2nm_single_cluster = NULL; + +static const char *o2nm_fence_method_desc[O2NM_FENCE_METHODS] = { + "reset", /* O2NM_FENCE_RESET */ + "panic", /* O2NM_FENCE_PANIC */ +}; + +static inline void o2nm_lock_subsystem(void); +static inline void o2nm_unlock_subsystem(void); + +struct o2nm_node *o2nm_get_node_by_num(u8 node_num) +{ + struct o2nm_node *node = NULL; + + if (node_num >= O2NM_MAX_NODES || o2nm_single_cluster == NULL) + goto out; + + read_lock(&o2nm_single_cluster->cl_nodes_lock); + node = o2nm_single_cluster->cl_nodes[node_num]; + if (node) + config_item_get(&node->nd_item); + read_unlock(&o2nm_single_cluster->cl_nodes_lock); +out: + return node; +} +EXPORT_SYMBOL_GPL(o2nm_get_node_by_num); + +int o2nm_configured_node_map(unsigned long *map, unsigned bytes) +{ + struct o2nm_cluster *cluster = o2nm_single_cluster; + + BUG_ON(bytes < (sizeof(cluster->cl_nodes_bitmap))); + + if (cluster == NULL) + return -EINVAL; + + read_lock(&cluster->cl_nodes_lock); + bitmap_copy(map, cluster->cl_nodes_bitmap, O2NM_MAX_NODES); + read_unlock(&cluster->cl_nodes_lock); + + return 0; +} +EXPORT_SYMBOL_GPL(o2nm_configured_node_map); + +static struct o2nm_node *o2nm_node_ip_tree_lookup(struct o2nm_cluster *cluster, + __be32 ip_needle, + struct rb_node ***ret_p, + struct rb_node **ret_parent) +{ + struct rb_node **p = &cluster->cl_node_ip_tree.rb_node; + struct rb_node *parent = NULL; + struct o2nm_node *node, *ret = NULL; + + while (*p) { + int cmp; + + parent = *p; + node = rb_entry(parent, struct o2nm_node, nd_ip_node); + + cmp = memcmp(&ip_needle, &node->nd_ipv4_address, + sizeof(ip_needle)); + if (cmp < 0) + p = &(*p)->rb_left; + else if (cmp > 0) + p = &(*p)->rb_right; + else { + ret = node; + break; + } + } + + if (ret_p != NULL) + *ret_p = p; + if (ret_parent != NULL) + *ret_parent = parent; + + return ret; +} + +struct o2nm_node *o2nm_get_node_by_ip(__be32 addr) +{ + struct o2nm_node *node = NULL; + struct o2nm_cluster *cluster = o2nm_single_cluster; + + if (cluster == NULL) + goto out; + + read_lock(&cluster->cl_nodes_lock); + node = o2nm_node_ip_tree_lookup(cluster, addr, NULL, NULL); + if (node) + config_item_get(&node->nd_item); + read_unlock(&cluster->cl_nodes_lock); + +out: + return node; +} +EXPORT_SYMBOL_GPL(o2nm_get_node_by_ip); + +void o2nm_node_put(struct o2nm_node *node) +{ + config_item_put(&node->nd_item); +} +EXPORT_SYMBOL_GPL(o2nm_node_put); + +void o2nm_node_get(struct o2nm_node *node) +{ + config_item_get(&node->nd_item); +} +EXPORT_SYMBOL_GPL(o2nm_node_get); + +u8 o2nm_this_node(void) +{ + u8 node_num = O2NM_MAX_NODES; + + if (o2nm_single_cluster && o2nm_single_cluster->cl_has_local) + node_num = o2nm_single_cluster->cl_local_node; + + return node_num; +} +EXPORT_SYMBOL_GPL(o2nm_this_node); + +/* node configfs bits */ + +static struct o2nm_cluster *to_o2nm_cluster(struct config_item *item) +{ + return item ? + container_of(to_config_group(item), struct o2nm_cluster, + cl_group) + : NULL; +} + +static struct o2nm_node *to_o2nm_node(struct config_item *item) +{ + return item ? container_of(item, struct o2nm_node, nd_item) : NULL; +} + +static void o2nm_node_release(struct config_item *item) +{ + struct o2nm_node *node = to_o2nm_node(item); + kfree(node); +} + +static ssize_t o2nm_node_num_show(struct config_item *item, char *page) +{ + return sprintf(page, "%d\n", to_o2nm_node(item)->nd_num); +} + +static struct o2nm_cluster *to_o2nm_cluster_from_node(struct o2nm_node *node) +{ + /* through the first node_set .parent + * mycluster/nodes/mynode == o2nm_cluster->o2nm_node_group->o2nm_node */ + if (node->nd_item.ci_parent) + return to_o2nm_cluster(node->nd_item.ci_parent->ci_parent); + else + return NULL; +} + +enum { + O2NM_NODE_ATTR_NUM = 0, + O2NM_NODE_ATTR_PORT, + O2NM_NODE_ATTR_ADDRESS, +}; + +static ssize_t o2nm_node_num_store(struct config_item *item, const char *page, + size_t count) +{ + struct o2nm_node *node = to_o2nm_node(item); + struct o2nm_cluster *cluster; + unsigned long tmp; + char *p = (char *)page; + int ret = 0; + + tmp = simple_strtoul(p, &p, 0); + if (!p || (*p && (*p != '\n'))) + return -EINVAL; + + if (tmp >= O2NM_MAX_NODES) + return -ERANGE; + + /* once we're in the cl_nodes tree networking can look us up by + * node number and try to use our address and port attributes + * to connect to this node.. make sure that they've been set + * before writing the node attribute? */ + if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) || + !test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes)) + return -EINVAL; /* XXX */ + + o2nm_lock_subsystem(); + cluster = to_o2nm_cluster_from_node(node); + if (!cluster) { + o2nm_unlock_subsystem(); + return -EINVAL; + } + + write_lock(&cluster->cl_nodes_lock); + if (cluster->cl_nodes[tmp]) + ret = -EEXIST; + else if (test_and_set_bit(O2NM_NODE_ATTR_NUM, + &node->nd_set_attributes)) + ret = -EBUSY; + else { + cluster->cl_nodes[tmp] = node; + node->nd_num = tmp; + set_bit(tmp, cluster->cl_nodes_bitmap); + } + write_unlock(&cluster->cl_nodes_lock); + o2nm_unlock_subsystem(); + + if (ret) + return ret; + + return count; +} +static ssize_t o2nm_node_ipv4_port_show(struct config_item *item, char *page) +{ + return sprintf(page, "%u\n", ntohs(to_o2nm_node(item)->nd_ipv4_port)); +} + +static ssize_t o2nm_node_ipv4_port_store(struct config_item *item, + const char *page, size_t count) +{ + struct o2nm_node *node = to_o2nm_node(item); + unsigned long tmp; + char *p = (char *)page; + + tmp = simple_strtoul(p, &p, 0); + if (!p || (*p && (*p != '\n'))) + return -EINVAL; + + if (tmp == 0) + return -EINVAL; + if (tmp >= (u16)-1) + return -ERANGE; + + if (test_and_set_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes)) + return -EBUSY; + node->nd_ipv4_port = htons(tmp); + + return count; +} + +static ssize_t o2nm_node_ipv4_address_show(struct config_item *item, char *page) +{ + return sprintf(page, "%pI4\n", &to_o2nm_node(item)->nd_ipv4_address); +} + +static ssize_t o2nm_node_ipv4_address_store(struct config_item *item, + const char *page, + size_t count) +{ + struct o2nm_node *node = to_o2nm_node(item); + struct o2nm_cluster *cluster; + int ret, i; + struct rb_node **p, *parent; + unsigned int octets[4]; + __be32 ipv4_addr = 0; + + ret = sscanf(page, "%3u.%3u.%3u.%3u", &octets[3], &octets[2], + &octets[1], &octets[0]); + if (ret != 4) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(octets); i++) { + if (octets[i] > 255) + return -ERANGE; + be32_add_cpu(&ipv4_addr, octets[i] << (i * 8)); + } + + o2nm_lock_subsystem(); + cluster = to_o2nm_cluster_from_node(node); + if (!cluster) { + o2nm_unlock_subsystem(); + return -EINVAL; + } + + ret = 0; + write_lock(&cluster->cl_nodes_lock); + if (o2nm_node_ip_tree_lookup(cluster, ipv4_addr, &p, &parent)) + ret = -EEXIST; + else if (test_and_set_bit(O2NM_NODE_ATTR_ADDRESS, + &node->nd_set_attributes)) + ret = -EBUSY; + else { + rb_link_node(&node->nd_ip_node, parent, p); + rb_insert_color(&node->nd_ip_node, &cluster->cl_node_ip_tree); + } + write_unlock(&cluster->cl_nodes_lock); + o2nm_unlock_subsystem(); + + if (ret) + return ret; + + memcpy(&node->nd_ipv4_address, &ipv4_addr, sizeof(ipv4_addr)); + + return count; +} + +static ssize_t o2nm_node_local_show(struct config_item *item, char *page) +{ + return sprintf(page, "%d\n", to_o2nm_node(item)->nd_local); +} + +static ssize_t o2nm_node_local_store(struct config_item *item, const char *page, + size_t count) +{ + struct o2nm_node *node = to_o2nm_node(item); + struct o2nm_cluster *cluster; + unsigned long tmp; + char *p = (char *)page; + ssize_t ret; + + tmp = simple_strtoul(p, &p, 0); + if (!p || (*p && (*p != '\n'))) + return -EINVAL; + + tmp = !!tmp; /* boolean of whether this node wants to be local */ + + /* setting local turns on networking rx for now so we require having + * set everything else first */ + if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) || + !test_bit(O2NM_NODE_ATTR_NUM, &node->nd_set_attributes) || + !test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes)) + return -EINVAL; /* XXX */ + + o2nm_lock_subsystem(); + cluster = to_o2nm_cluster_from_node(node); + if (!cluster) { + ret = -EINVAL; + goto out; + } + + /* the only failure case is trying to set a new local node + * when a different one is already set */ + if (tmp && tmp == cluster->cl_has_local && + cluster->cl_local_node != node->nd_num) { + ret = -EBUSY; + goto out; + } + + /* bring up the rx thread if we're setting the new local node. */ + if (tmp && !cluster->cl_has_local) { + ret = o2net_start_listening(node); + if (ret) + goto out; + } + + if (!tmp && cluster->cl_has_local && + cluster->cl_local_node == node->nd_num) { + o2net_stop_listening(node); + cluster->cl_local_node = O2NM_INVALID_NODE_NUM; + } + + node->nd_local = tmp; + if (node->nd_local) { + cluster->cl_has_local = tmp; + cluster->cl_local_node = node->nd_num; + } + + ret = count; + +out: + o2nm_unlock_subsystem(); + return ret; +} + +CONFIGFS_ATTR(o2nm_node_, num); +CONFIGFS_ATTR(o2nm_node_, ipv4_port); +CONFIGFS_ATTR(o2nm_node_, ipv4_address); +CONFIGFS_ATTR(o2nm_node_, local); + +static struct configfs_attribute *o2nm_node_attrs[] = { + &o2nm_node_attr_num, + &o2nm_node_attr_ipv4_port, + &o2nm_node_attr_ipv4_address, + &o2nm_node_attr_local, + NULL, +}; + +static struct configfs_item_operations o2nm_node_item_ops = { + .release = o2nm_node_release, +}; + +static const struct config_item_type o2nm_node_type = { + .ct_item_ops = &o2nm_node_item_ops, + .ct_attrs = o2nm_node_attrs, + .ct_owner = THIS_MODULE, +}; + +/* node set */ + +struct o2nm_node_group { + struct config_group ns_group; + /* some stuff? */ +}; + +#if 0 +static struct o2nm_node_group *to_o2nm_node_group(struct config_group *group) +{ + return group ? + container_of(group, struct o2nm_node_group, ns_group) + : NULL; +} +#endif + +static ssize_t o2nm_cluster_attr_write(const char *page, ssize_t count, + unsigned int *val) +{ + unsigned long tmp; + char *p = (char *)page; + + tmp = simple_strtoul(p, &p, 0); + if (!p || (*p && (*p != '\n'))) + return -EINVAL; + + if (tmp == 0) + return -EINVAL; + if (tmp >= (u32)-1) + return -ERANGE; + + *val = tmp; + + return count; +} + +static ssize_t o2nm_cluster_idle_timeout_ms_show(struct config_item *item, + char *page) +{ + return sprintf(page, "%u\n", to_o2nm_cluster(item)->cl_idle_timeout_ms); +} + +static ssize_t o2nm_cluster_idle_timeout_ms_store(struct config_item *item, + const char *page, size_t count) +{ + struct o2nm_cluster *cluster = to_o2nm_cluster(item); + ssize_t ret; + unsigned int val; + + ret = o2nm_cluster_attr_write(page, count, &val); + + if (ret > 0) { + if (cluster->cl_idle_timeout_ms != val + && o2net_num_connected_peers()) { + mlog(ML_NOTICE, + "o2net: cannot change idle timeout after " + "the first peer has agreed to it." + " %d connected peers\n", + o2net_num_connected_peers()); + ret = -EINVAL; + } else if (val <= cluster->cl_keepalive_delay_ms) { + mlog(ML_NOTICE, "o2net: idle timeout must be larger " + "than keepalive delay\n"); + ret = -EINVAL; + } else { + cluster->cl_idle_timeout_ms = val; + } + } + + return ret; +} + +static ssize_t o2nm_cluster_keepalive_delay_ms_show( + struct config_item *item, char *page) +{ + return sprintf(page, "%u\n", + to_o2nm_cluster(item)->cl_keepalive_delay_ms); +} + +static ssize_t o2nm_cluster_keepalive_delay_ms_store( + struct config_item *item, const char *page, size_t count) +{ + struct o2nm_cluster *cluster = to_o2nm_cluster(item); + ssize_t ret; + unsigned int val; + + ret = o2nm_cluster_attr_write(page, count, &val); + + if (ret > 0) { + if (cluster->cl_keepalive_delay_ms != val + && o2net_num_connected_peers()) { + mlog(ML_NOTICE, + "o2net: cannot change keepalive delay after" + " the first peer has agreed to it." + " %d connected peers\n", + o2net_num_connected_peers()); + ret = -EINVAL; + } else if (val >= cluster->cl_idle_timeout_ms) { + mlog(ML_NOTICE, "o2net: keepalive delay must be " + "smaller than idle timeout\n"); + ret = -EINVAL; + } else { + cluster->cl_keepalive_delay_ms = val; + } + } + + return ret; +} + +static ssize_t o2nm_cluster_reconnect_delay_ms_show( + struct config_item *item, char *page) +{ + return sprintf(page, "%u\n", + to_o2nm_cluster(item)->cl_reconnect_delay_ms); +} + +static ssize_t o2nm_cluster_reconnect_delay_ms_store( + struct config_item *item, const char *page, size_t count) +{ + return o2nm_cluster_attr_write(page, count, + &to_o2nm_cluster(item)->cl_reconnect_delay_ms); +} + +static ssize_t o2nm_cluster_fence_method_show( + struct config_item *item, char *page) +{ + struct o2nm_cluster *cluster = to_o2nm_cluster(item); + ssize_t ret = 0; + + if (cluster) + ret = sprintf(page, "%s\n", + o2nm_fence_method_desc[cluster->cl_fence_method]); + return ret; +} + +static ssize_t o2nm_cluster_fence_method_store( + struct config_item *item, const char *page, size_t count) +{ + unsigned int i; + + if (page[count - 1] != '\n') + goto bail; + + for (i = 0; i < O2NM_FENCE_METHODS; ++i) { + if (count != strlen(o2nm_fence_method_desc[i]) + 1) + continue; + if (strncasecmp(page, o2nm_fence_method_desc[i], count - 1)) + continue; + if (to_o2nm_cluster(item)->cl_fence_method != i) { + printk(KERN_INFO "ocfs2: Changing fence method to %s\n", + o2nm_fence_method_desc[i]); + to_o2nm_cluster(item)->cl_fence_method = i; + } + return count; + } + +bail: + return -EINVAL; +} + +CONFIGFS_ATTR(o2nm_cluster_, idle_timeout_ms); +CONFIGFS_ATTR(o2nm_cluster_, keepalive_delay_ms); +CONFIGFS_ATTR(o2nm_cluster_, reconnect_delay_ms); +CONFIGFS_ATTR(o2nm_cluster_, fence_method); + +static struct configfs_attribute *o2nm_cluster_attrs[] = { + &o2nm_cluster_attr_idle_timeout_ms, + &o2nm_cluster_attr_keepalive_delay_ms, + &o2nm_cluster_attr_reconnect_delay_ms, + &o2nm_cluster_attr_fence_method, + NULL, +}; + +static struct config_item *o2nm_node_group_make_item(struct config_group *group, + const char *name) +{ + struct o2nm_node *node = NULL; + + if (strlen(name) > O2NM_MAX_NAME_LEN) + return ERR_PTR(-ENAMETOOLONG); + + node = kzalloc(sizeof(struct o2nm_node), GFP_KERNEL); + if (node == NULL) + return ERR_PTR(-ENOMEM); + + strcpy(node->nd_name, name); /* use item.ci_namebuf instead? */ + config_item_init_type_name(&node->nd_item, name, &o2nm_node_type); + spin_lock_init(&node->nd_lock); + + mlog(ML_CLUSTER, "o2nm: Registering node %s\n", name); + + return &node->nd_item; +} + +static void o2nm_node_group_drop_item(struct config_group *group, + struct config_item *item) +{ + struct o2nm_node *node = to_o2nm_node(item); + struct o2nm_cluster *cluster = to_o2nm_cluster(group->cg_item.ci_parent); + + if (cluster->cl_nodes[node->nd_num] == node) { + o2net_disconnect_node(node); + + if (cluster->cl_has_local && + (cluster->cl_local_node == node->nd_num)) { + cluster->cl_has_local = 0; + cluster->cl_local_node = O2NM_INVALID_NODE_NUM; + o2net_stop_listening(node); + } + } + + /* XXX call into net to stop this node from trading messages */ + + write_lock(&cluster->cl_nodes_lock); + + /* XXX sloppy */ + if (node->nd_ipv4_address) + rb_erase(&node->nd_ip_node, &cluster->cl_node_ip_tree); + + /* nd_num might be 0 if the node number hasn't been set.. */ + if (cluster->cl_nodes[node->nd_num] == node) { + cluster->cl_nodes[node->nd_num] = NULL; + clear_bit(node->nd_num, cluster->cl_nodes_bitmap); + } + write_unlock(&cluster->cl_nodes_lock); + + mlog(ML_CLUSTER, "o2nm: Unregistered node %s\n", + config_item_name(&node->nd_item)); + + config_item_put(item); +} + +static struct configfs_group_operations o2nm_node_group_group_ops = { + .make_item = o2nm_node_group_make_item, + .drop_item = o2nm_node_group_drop_item, +}; + +static const struct config_item_type o2nm_node_group_type = { + .ct_group_ops = &o2nm_node_group_group_ops, + .ct_owner = THIS_MODULE, +}; + +/* cluster */ + +static void o2nm_cluster_release(struct config_item *item) +{ + struct o2nm_cluster *cluster = to_o2nm_cluster(item); + + kfree(cluster); +} + +static struct configfs_item_operations o2nm_cluster_item_ops = { + .release = o2nm_cluster_release, +}; + +static const struct config_item_type o2nm_cluster_type = { + .ct_item_ops = &o2nm_cluster_item_ops, + .ct_attrs = o2nm_cluster_attrs, + .ct_owner = THIS_MODULE, +}; + +/* cluster set */ + +struct o2nm_cluster_group { + struct configfs_subsystem cs_subsys; + /* some stuff? */ +}; + +#if 0 +static struct o2nm_cluster_group *to_o2nm_cluster_group(struct config_group *group) +{ + return group ? + container_of(to_configfs_subsystem(group), struct o2nm_cluster_group, cs_subsys) + : NULL; +} +#endif + +static struct config_group *o2nm_cluster_group_make_group(struct config_group *group, + const char *name) +{ + struct o2nm_cluster *cluster = NULL; + struct o2nm_node_group *ns = NULL; + struct config_group *o2hb_group = NULL, *ret = NULL; + + /* this runs under the parent dir's i_rwsem; there can be only + * one caller in here at a time */ + if (o2nm_single_cluster) + return ERR_PTR(-ENOSPC); + + cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL); + ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL); + o2hb_group = o2hb_alloc_hb_set(); + if (cluster == NULL || ns == NULL || o2hb_group == NULL) + goto out; + + config_group_init_type_name(&cluster->cl_group, name, + &o2nm_cluster_type); + configfs_add_default_group(&ns->ns_group, &cluster->cl_group); + + config_group_init_type_name(&ns->ns_group, "node", + &o2nm_node_group_type); + configfs_add_default_group(o2hb_group, &cluster->cl_group); + + rwlock_init(&cluster->cl_nodes_lock); + cluster->cl_node_ip_tree = RB_ROOT; + cluster->cl_reconnect_delay_ms = O2NET_RECONNECT_DELAY_MS_DEFAULT; + cluster->cl_idle_timeout_ms = O2NET_IDLE_TIMEOUT_MS_DEFAULT; + cluster->cl_keepalive_delay_ms = O2NET_KEEPALIVE_DELAY_MS_DEFAULT; + cluster->cl_fence_method = O2NM_FENCE_RESET; + + ret = &cluster->cl_group; + o2nm_single_cluster = cluster; + +out: + if (ret == NULL) { + kfree(cluster); + kfree(ns); + o2hb_free_hb_set(o2hb_group); + ret = ERR_PTR(-ENOMEM); + } + + return ret; +} + +static void o2nm_cluster_group_drop_item(struct config_group *group, struct config_item *item) +{ + struct o2nm_cluster *cluster = to_o2nm_cluster(item); + + BUG_ON(o2nm_single_cluster != cluster); + o2nm_single_cluster = NULL; + + configfs_remove_default_groups(&cluster->cl_group); + config_item_put(item); +} + +static struct configfs_group_operations o2nm_cluster_group_group_ops = { + .make_group = o2nm_cluster_group_make_group, + .drop_item = o2nm_cluster_group_drop_item, +}; + +static const struct config_item_type o2nm_cluster_group_type = { + .ct_group_ops = &o2nm_cluster_group_group_ops, + .ct_owner = THIS_MODULE, +}; + +static struct o2nm_cluster_group o2nm_cluster_group = { + .cs_subsys = { + .su_group = { + .cg_item = { + .ci_namebuf = "cluster", + .ci_type = &o2nm_cluster_group_type, + }, + }, + }, +}; + +static inline void o2nm_lock_subsystem(void) +{ + mutex_lock(&o2nm_cluster_group.cs_subsys.su_mutex); +} + +static inline void o2nm_unlock_subsystem(void) +{ + mutex_unlock(&o2nm_cluster_group.cs_subsys.su_mutex); +} + +int o2nm_depend_item(struct config_item *item) +{ + return configfs_depend_item(&o2nm_cluster_group.cs_subsys, item); +} + +void o2nm_undepend_item(struct config_item *item) +{ + configfs_undepend_item(item); +} + +int o2nm_depend_this_node(void) +{ + int ret = 0; + struct o2nm_node *local_node; + + local_node = o2nm_get_node_by_num(o2nm_this_node()); + if (!local_node) { + ret = -EINVAL; + goto out; + } + + ret = o2nm_depend_item(&local_node->nd_item); + o2nm_node_put(local_node); + +out: + return ret; +} + +void o2nm_undepend_this_node(void) +{ + struct o2nm_node *local_node; + + local_node = o2nm_get_node_by_num(o2nm_this_node()); + BUG_ON(!local_node); + + o2nm_undepend_item(&local_node->nd_item); + o2nm_node_put(local_node); +} + + +static void __exit exit_o2nm(void) +{ + /* XXX sync with hb callbacks and shut down hb? */ + o2net_unregister_hb_callbacks(); + configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys); + o2cb_sys_shutdown(); + + o2net_exit(); + o2hb_exit(); +} + +static int __init init_o2nm(void) +{ + int ret; + + o2hb_init(); + + ret = o2net_init(); + if (ret) + goto out_o2hb; + + ret = o2net_register_hb_callbacks(); + if (ret) + goto out_o2net; + + config_group_init(&o2nm_cluster_group.cs_subsys.su_group); + mutex_init(&o2nm_cluster_group.cs_subsys.su_mutex); + ret = configfs_register_subsystem(&o2nm_cluster_group.cs_subsys); + if (ret) { + printk(KERN_ERR "nodemanager: Registration returned %d\n", ret); + goto out_callbacks; + } + + ret = o2cb_sys_init(); + if (!ret) + goto out; + + configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys); +out_callbacks: + o2net_unregister_hb_callbacks(); +out_o2net: + o2net_exit(); +out_o2hb: + o2hb_exit(); +out: + return ret; +} + +MODULE_AUTHOR("Oracle"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("OCFS2 cluster management"); + +module_init(init_o2nm) +module_exit(exit_o2nm) -- cgit v1.2.3