Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 916 insertions, 0 deletions

diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
new file mode 100644
index 000000000..4c6441536
--- /dev/null
+++ b/net/ceph/ceph_common.c
@@ -0,0 +1,916 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/ceph/ceph_debug.h>
+#include <linux/backing-dev.h>
+#include <linux/ctype.h>
+#include <linux/fs.h>
+#include <linux/inet.h>
+#include <linux/in6.h>
+#include <linux/key.h>
+#include <keys/ceph-type.h>
+#include <linux/module.h>
+#include <linux/mount.h>
+#include <linux/nsproxy.h>
+#include <linux/fs_parser.h>
+#include <linux/sched.h>
+#include <linux/sched/mm.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/statfs.h>
+#include <linux/string.h>
+#include <linux/vmalloc.h>
+
+
+#include <linux/ceph/ceph_features.h>
+#include <linux/ceph/libceph.h>
+#include <linux/ceph/debugfs.h>
+#include <linux/ceph/decode.h>
+#include <linux/ceph/mon_client.h>
+#include <linux/ceph/auth.h>
+#include "crypto.h"
+
+
+/*
+ * Module compatibility interface.  For now it doesn't do anything,
+ * but its existence signals a certain level of functionality.
+ *
+ * The data buffer is used to pass information both to and from
+ * libceph.  The return value indicates whether libceph determines
+ * it is compatible with the caller (from another kernel module),
+ * given the provided data.
+ *
+ * The data pointer can be null.
+ */
+bool libceph_compatible(void *data)
+{
+	return true;
+}
+EXPORT_SYMBOL(libceph_compatible);
+
+static int param_get_supported_features(char *buffer,
+					const struct kernel_param *kp)
+{
+	return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
+}
+static const struct kernel_param_ops param_ops_supported_features = {
+	.get = param_get_supported_features,
+};
+module_param_cb(supported_features, &param_ops_supported_features, NULL,
+		0444);
+
+const char *ceph_msg_type_name(int type)
+{
+	switch (type) {
+	case CEPH_MSG_SHUTDOWN: return "shutdown";
+	case CEPH_MSG_PING: return "ping";
+	case CEPH_MSG_AUTH: return "auth";
+	case CEPH_MSG_AUTH_REPLY: return "auth_reply";
+	case CEPH_MSG_MON_MAP: return "mon_map";
+	case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
+	case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
+	case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
+	case CEPH_MSG_STATFS: return "statfs";
+	case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
+	case CEPH_MSG_MON_GET_VERSION: return "mon_get_version";
+	case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
+	case CEPH_MSG_MDS_MAP: return "mds_map";
+	case CEPH_MSG_FS_MAP_USER: return "fs_map_user";
+	case CEPH_MSG_CLIENT_SESSION: return "client_session";
+	case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
+	case CEPH_MSG_CLIENT_REQUEST: return "client_request";
+	case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
+	case CEPH_MSG_CLIENT_REPLY: return "client_reply";
+	case CEPH_MSG_CLIENT_CAPS: return "client_caps";
+	case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
+	case CEPH_MSG_CLIENT_QUOTA: return "client_quota";
+	case CEPH_MSG_CLIENT_SNAP: return "client_snap";
+	case CEPH_MSG_CLIENT_LEASE: return "client_lease";
+	case CEPH_MSG_POOLOP_REPLY: return "poolop_reply";
+	case CEPH_MSG_POOLOP: return "poolop";
+	case CEPH_MSG_MON_COMMAND: return "mon_command";
+	case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack";
+	case CEPH_MSG_OSD_MAP: return "osd_map";
+	case CEPH_MSG_OSD_OP: return "osd_op";
+	case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
+	case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
+	case CEPH_MSG_OSD_BACKOFF: return "osd_backoff";
+	default: return "unknown";
+	}
+}
+EXPORT_SYMBOL(ceph_msg_type_name);
+
+/*
+ * Initially learn our fsid, or verify an fsid matches.
+ */
+int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
+{
+	if (client->have_fsid) {
+		if (ceph_fsid_compare(&client->fsid, fsid)) {
+			pr_err("bad fsid, had %pU got %pU",
+			       &client->fsid, fsid);
+			return -1;
+		}
+	} else {
+		memcpy(&client->fsid, fsid, sizeof(*fsid));
+	}
+	return 0;
+}
+EXPORT_SYMBOL(ceph_check_fsid);
+
+static int strcmp_null(const char *s1, const char *s2)
+{
+	if (!s1 && !s2)
+		return 0;
+	if (s1 && !s2)
+		return -1;
+	if (!s1 && s2)
+		return 1;
+	return strcmp(s1, s2);
+}
+
+int ceph_compare_options(struct ceph_options *new_opt,
+			 struct ceph_client *client)
+{
+	struct ceph_options *opt1 = new_opt;
+	struct ceph_options *opt2 = client->options;
+	int ofs = offsetof(struct ceph_options, mon_addr);
+	int i;
+	int ret;
+
+	/*
+	 * Don't bother comparing options if network namespaces don't
+	 * match.
+	 */
+	if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
+		return -1;
+
+	ret = memcmp(opt1, opt2, ofs);
+	if (ret)
+		return ret;
+
+	ret = strcmp_null(opt1->name, opt2->name);
+	if (ret)
+		return ret;
+
+	if (opt1->key && !opt2->key)
+		return -1;
+	if (!opt1->key && opt2->key)
+		return 1;
+	if (opt1->key && opt2->key) {
+		if (opt1->key->type != opt2->key->type)
+			return -1;
+		if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
+			return -1;
+		if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
+			return -1;
+		if (opt1->key->len != opt2->key->len)
+			return -1;
+		if (opt1->key->key && !opt2->key->key)
+			return -1;
+		if (!opt1->key->key && opt2->key->key)
+			return 1;
+		if (opt1->key->key && opt2->key->key) {
+			ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
+			if (ret)
+				return ret;
+		}
+	}
+
+	ret = ceph_compare_crush_locs(&opt1->crush_locs, &opt2->crush_locs);
+	if (ret)
+		return ret;
+
+	/* any matching mon ip implies a match */
+	for (i = 0; i < opt1->num_mon; i++) {
+		if (ceph_monmap_contains(client->monc.monmap,
+				 &opt1->mon_addr[i]))
+			return 0;
+	}
+	return -1;
+}
+EXPORT_SYMBOL(ceph_compare_options);
+
+int ceph_parse_fsid(const char *str, struct ceph_fsid *fsid)
+{
+	int i = 0;
+	char tmp[3];
+	int err = -EINVAL;
+	int d;
+
+	dout("%s '%s'\n", __func__, str);
+	tmp[2] = 0;
+	while (*str && i < 16) {
+		if (ispunct(*str)) {
+			str++;
+			continue;
+		}
+		if (!isxdigit(str[0]) || !isxdigit(str[1]))
+			break;
+		tmp[0] = str[0];
+		tmp[1] = str[1];
+		if (sscanf(tmp, "%x", &d) < 1)
+			break;
+		fsid->fsid[i] = d & 0xff;
+		i++;
+		str += 2;
+	}
+
+	if (i == 16)
+		err = 0;
+	dout("%s ret %d got fsid %pU\n", __func__, err, fsid);
+	return err;
+}
+EXPORT_SYMBOL(ceph_parse_fsid);
+
+/*
+ * ceph options
+ */
+enum {
+	Opt_osdkeepalivetimeout,
+	Opt_mount_timeout,
+	Opt_osd_idle_ttl,
+	Opt_osd_request_timeout,
+	/* int args above */
+	Opt_fsid,
+	Opt_name,
+	Opt_secret,
+	Opt_key,
+	Opt_ip,
+	Opt_crush_location,
+	Opt_read_from_replica,
+	Opt_ms_mode,
+	/* string args above */
+	Opt_share,
+	Opt_crc,
+	Opt_cephx_require_signatures,
+	Opt_cephx_sign_messages,
+	Opt_tcp_nodelay,
+	Opt_abort_on_full,
+	Opt_rxbounce,
+};
+
+enum {
+	Opt_read_from_replica_no,
+	Opt_read_from_replica_balance,
+	Opt_read_from_replica_localize,
+};
+
+static const struct constant_table ceph_param_read_from_replica[] = {
+	{"no",		Opt_read_from_replica_no},
+	{"balance",	Opt_read_from_replica_balance},
+	{"localize",	Opt_read_from_replica_localize},
+	{}
+};
+
+enum ceph_ms_mode {
+	Opt_ms_mode_legacy,
+	Opt_ms_mode_crc,
+	Opt_ms_mode_secure,
+	Opt_ms_mode_prefer_crc,
+	Opt_ms_mode_prefer_secure
+};
+
+static const struct constant_table ceph_param_ms_mode[] = {
+	{"legacy",		Opt_ms_mode_legacy},
+	{"crc",			Opt_ms_mode_crc},
+	{"secure",		Opt_ms_mode_secure},
+	{"prefer-crc",		Opt_ms_mode_prefer_crc},
+	{"prefer-secure",	Opt_ms_mode_prefer_secure},
+	{}
+};
+
+static const struct fs_parameter_spec ceph_parameters[] = {
+	fsparam_flag	("abort_on_full",		Opt_abort_on_full),
+	__fsparam	(NULL, "cephx_require_signatures", Opt_cephx_require_signatures,
+			 fs_param_neg_with_no|fs_param_deprecated, NULL),
+	fsparam_flag_no ("cephx_sign_messages",		Opt_cephx_sign_messages),
+	fsparam_flag_no ("crc",				Opt_crc),
+	fsparam_string	("crush_location",		Opt_crush_location),
+	fsparam_string	("fsid",			Opt_fsid),
+	fsparam_string	("ip",				Opt_ip),
+	fsparam_string	("key",				Opt_key),
+	fsparam_u32	("mount_timeout",		Opt_mount_timeout),
+	fsparam_string	("name",			Opt_name),
+	fsparam_u32	("osd_idle_ttl",		Opt_osd_idle_ttl),
+	fsparam_u32	("osd_request_timeout",		Opt_osd_request_timeout),
+	fsparam_u32	("osdkeepalive",		Opt_osdkeepalivetimeout),
+	fsparam_enum	("read_from_replica",		Opt_read_from_replica,
+			 ceph_param_read_from_replica),
+	fsparam_flag	("rxbounce",			Opt_rxbounce),
+	fsparam_enum	("ms_mode",			Opt_ms_mode,
+			 ceph_param_ms_mode),
+	fsparam_string	("secret",			Opt_secret),
+	fsparam_flag_no ("share",			Opt_share),
+	fsparam_flag_no ("tcp_nodelay",			Opt_tcp_nodelay),
+	{}
+};
+
+struct ceph_options *ceph_alloc_options(void)
+{
+	struct ceph_options *opt;
+
+	opt = kzalloc(sizeof(*opt), GFP_KERNEL);
+	if (!opt)
+		return NULL;
+
+	opt->crush_locs = RB_ROOT;
+	opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
+				GFP_KERNEL);
+	if (!opt->mon_addr) {
+		kfree(opt);
+		return NULL;
+	}
+
+	opt->flags = CEPH_OPT_DEFAULT;
+	opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
+	opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
+	opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
+	opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
+	opt->read_from_replica = CEPH_READ_FROM_REPLICA_DEFAULT;
+	opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
+	opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
+	return opt;
+}
+EXPORT_SYMBOL(ceph_alloc_options);
+
+void ceph_destroy_options(struct ceph_options *opt)
+{
+	dout("destroy_options %p\n", opt);
+	if (!opt)
+		return;
+
+	ceph_clear_crush_locs(&opt->crush_locs);
+	kfree(opt->name);
+	if (opt->key) {
+		ceph_crypto_key_destroy(opt->key);
+		kfree(opt->key);
+	}
+	kfree(opt->mon_addr);
+	kfree(opt);
+}
+EXPORT_SYMBOL(ceph_destroy_options);
+
+/* get secret from key store */
+static int get_secret(struct ceph_crypto_key *dst, const char *name,
+		      struct p_log *log)
+{
+	struct key *ukey;
+	int key_err;
+	int err = 0;
+	struct ceph_crypto_key *ckey;
+
+	ukey = request_key(&key_type_ceph, name, NULL);
+	if (IS_ERR(ukey)) {
+		/* request_key errors don't map nicely to mount(2)
+		   errors; don't even try, but still printk */
+		key_err = PTR_ERR(ukey);
+		switch (key_err) {
+		case -ENOKEY:
+			error_plog(log, "Failed due to key not found: %s",
+			       name);
+			break;
+		case -EKEYEXPIRED:
+			error_plog(log, "Failed due to expired key: %s",
+			       name);
+			break;
+		case -EKEYREVOKED:
+			error_plog(log, "Failed due to revoked key: %s",
+			       name);
+			break;
+		default:
+			error_plog(log, "Failed due to key error %d: %s",
+			       key_err, name);
+		}
+		err = -EPERM;
+		goto out;
+	}
+
+	ckey = ukey->payload.data[0];
+	err = ceph_crypto_key_clone(dst, ckey);
+	if (err)
+		goto out_key;
+	/* pass through, err is 0 */
+
+out_key:
+	key_put(ukey);
+out:
+	return err;
+}
+
+int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
+		       struct fc_log *l, char delim)
+{
+	struct p_log log = {.prefix = "libceph", .log = l};
+	int ret;
+
+	/* ip1[:port1][<delim>ip2[:port2]...] */
+	ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
+			     &opt->num_mon, delim);
+	if (ret) {
+		error_plog(&log, "Failed to parse monitor IPs: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(ceph_parse_mon_ips);
+
+int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
+		     struct fc_log *l)
+{
+	struct fs_parse_result result;
+	int token, err;
+	struct p_log log = {.prefix = "libceph", .log = l};
+
+	token = __fs_parse(&log, ceph_parameters, param, &result);
+	dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
+	if (token < 0)
+		return token;
+
+	switch (token) {
+	case Opt_ip:
+		err = ceph_parse_ips(param->string,
+				     param->string + param->size,
+				     &opt->my_addr, 1, NULL, ',');
+		if (err) {
+			error_plog(&log, "Failed to parse ip: %d", err);
+			return err;
+		}
+		opt->flags |= CEPH_OPT_MYIP;
+		break;
+
+	case Opt_fsid:
+		err = ceph_parse_fsid(param->string, &opt->fsid);
+		if (err) {
+			error_plog(&log, "Failed to parse fsid: %d", err);
+			return err;
+		}
+		opt->flags |= CEPH_OPT_FSID;
+		break;
+	case Opt_name:
+		kfree(opt->name);
+		opt->name = param->string;
+		param->string = NULL;
+		break;
+	case Opt_secret:
+		ceph_crypto_key_destroy(opt->key);
+		kfree(opt->key);
+
+		opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
+		if (!opt->key)
+			return -ENOMEM;
+		err = ceph_crypto_key_unarmor(opt->key, param->string);
+		if (err) {
+			error_plog(&log, "Failed to parse secret: %d", err);
+			return err;
+		}
+		break;
+	case Opt_key:
+		ceph_crypto_key_destroy(opt->key);
+		kfree(opt->key);
+
+		opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
+		if (!opt->key)
+			return -ENOMEM;
+		return get_secret(opt->key, param->string, &log);
+	case Opt_crush_location:
+		ceph_clear_crush_locs(&opt->crush_locs);
+		err = ceph_parse_crush_location(param->string,
+						&opt->crush_locs);
+		if (err) {
+			error_plog(&log, "Failed to parse CRUSH location: %d",
+				   err);
+			return err;
+		}
+		break;
+	case Opt_read_from_replica:
+		switch (result.uint_32) {
+		case Opt_read_from_replica_no:
+			opt->read_from_replica = 0;
+			break;
+		case Opt_read_from_replica_balance:
+			opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS;
+			break;
+		case Opt_read_from_replica_localize:
+			opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS;
+			break;
+		default:
+			BUG();
+		}
+		break;
+	case Opt_ms_mode:
+		switch (result.uint_32) {
+		case Opt_ms_mode_legacy:
+			opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
+			opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
+			break;
+		case Opt_ms_mode_crc:
+			opt->con_modes[0] = CEPH_CON_MODE_CRC;
+			opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
+			break;
+		case Opt_ms_mode_secure:
+			opt->con_modes[0] = CEPH_CON_MODE_SECURE;
+			opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
+			break;
+		case Opt_ms_mode_prefer_crc:
+			opt->con_modes[0] = CEPH_CON_MODE_CRC;
+			opt->con_modes[1] = CEPH_CON_MODE_SECURE;
+			break;
+		case Opt_ms_mode_prefer_secure:
+			opt->con_modes[0] = CEPH_CON_MODE_SECURE;
+			opt->con_modes[1] = CEPH_CON_MODE_CRC;
+			break;
+		default:
+			BUG();
+		}
+		break;
+
+	case Opt_osdkeepalivetimeout:
+		/* 0 isn't well defined right now, reject it */
+		if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
+			goto out_of_range;
+		opt->osd_keepalive_timeout =
+		    msecs_to_jiffies(result.uint_32 * 1000);
+		break;
+	case Opt_osd_idle_ttl:
+		/* 0 isn't well defined right now, reject it */
+		if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
+			goto out_of_range;
+		opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
+		break;
+	case Opt_mount_timeout:
+		/* 0 is "wait forever" (i.e. infinite timeout) */
+		if (result.uint_32 > INT_MAX / 1000)
+			goto out_of_range;
+		opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
+		break;
+	case Opt_osd_request_timeout:
+		/* 0 is "wait forever" (i.e. infinite timeout) */
+		if (result.uint_32 > INT_MAX / 1000)
+			goto out_of_range;
+		opt->osd_request_timeout =
+		    msecs_to_jiffies(result.uint_32 * 1000);
+		break;
+
+	case Opt_share:
+		if (!result.negated)
+			opt->flags &= ~CEPH_OPT_NOSHARE;
+		else
+			opt->flags |= CEPH_OPT_NOSHARE;
+		break;
+	case Opt_crc:
+		if (!result.negated)
+			opt->flags &= ~CEPH_OPT_NOCRC;
+		else
+			opt->flags |= CEPH_OPT_NOCRC;
+		break;
+	case Opt_cephx_require_signatures:
+		if (!result.negated)
+			warn_plog(&log, "Ignoring cephx_require_signatures");
+		else
+			warn_plog(&log, "Ignoring nocephx_require_signatures, use nocephx_sign_messages");
+		break;
+	case Opt_cephx_sign_messages:
+		if (!result.negated)
+			opt->flags &= ~CEPH_OPT_NOMSGSIGN;
+		else
+			opt->flags |= CEPH_OPT_NOMSGSIGN;
+		break;
+	case Opt_tcp_nodelay:
+		if (!result.negated)
+			opt->flags |= CEPH_OPT_TCP_NODELAY;
+		else
+			opt->flags &= ~CEPH_OPT_TCP_NODELAY;
+		break;
+
+	case Opt_abort_on_full:
+		opt->flags |= CEPH_OPT_ABORT_ON_FULL;
+		break;
+	case Opt_rxbounce:
+		opt->flags |= CEPH_OPT_RXBOUNCE;
+		break;
+
+	default:
+		BUG();
+	}
+
+	return 0;
+
+out_of_range:
+	return inval_plog(&log, "%s out of range", param->key);
+}
+EXPORT_SYMBOL(ceph_parse_param);
+
+int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
+			      bool show_all)
+{
+	struct ceph_options *opt = client->options;
+	size_t pos = m->count;
+	struct rb_node *n;
+
+	if (opt->name) {
+		seq_puts(m, "name=");
+		seq_escape(m, opt->name, ", \t\n\\");
+		seq_putc(m, ',');
+	}
+	if (opt->key)
+		seq_puts(m, "secret=<hidden>,");
+
+	if (!RB_EMPTY_ROOT(&opt->crush_locs)) {
+		seq_puts(m, "crush_location=");
+		for (n = rb_first(&opt->crush_locs); ; ) {
+			struct crush_loc_node *loc =
+			    rb_entry(n, struct crush_loc_node, cl_node);
+
+			seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name,
+				   loc->cl_loc.cl_name);
+			n = rb_next(n);
+			if (!n)
+				break;
+
+			seq_putc(m, '|');
+		}
+		seq_putc(m, ',');
+	}
+	if (opt->read_from_replica == CEPH_OSD_FLAG_BALANCE_READS) {
+		seq_puts(m, "read_from_replica=balance,");
+	} else if (opt->read_from_replica == CEPH_OSD_FLAG_LOCALIZE_READS) {
+		seq_puts(m, "read_from_replica=localize,");
+	}
+	if (opt->con_modes[0] != CEPH_CON_MODE_UNKNOWN) {
+		if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
+		    opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
+			seq_puts(m, "ms_mode=crc,");
+		} else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
+			   opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
+			seq_puts(m, "ms_mode=secure,");
+		} else if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
+			   opt->con_modes[1] == CEPH_CON_MODE_SECURE) {
+			seq_puts(m, "ms_mode=prefer-crc,");
+		} else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
+			   opt->con_modes[1] == CEPH_CON_MODE_CRC) {
+			seq_puts(m, "ms_mode=prefer-secure,");
+		}
+	}
+
+	if (opt->flags & CEPH_OPT_FSID)
+		seq_printf(m, "fsid=%pU,", &opt->fsid);
+	if (opt->flags & CEPH_OPT_NOSHARE)
+		seq_puts(m, "noshare,");
+	if (opt->flags & CEPH_OPT_NOCRC)
+		seq_puts(m, "nocrc,");
+	if (opt->flags & CEPH_OPT_NOMSGSIGN)
+		seq_puts(m, "nocephx_sign_messages,");
+	if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
+		seq_puts(m, "notcp_nodelay,");
+	if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL))
+		seq_puts(m, "abort_on_full,");
+	if (opt->flags & CEPH_OPT_RXBOUNCE)
+		seq_puts(m, "rxbounce,");
+
+	if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
+		seq_printf(m, "mount_timeout=%d,",
+			   jiffies_to_msecs(opt->mount_timeout) / 1000);
+	if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
+		seq_printf(m, "osd_idle_ttl=%d,",
+			   jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
+	if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
+		seq_printf(m, "osdkeepalivetimeout=%d,",
+		    jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
+	if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
+		seq_printf(m, "osd_request_timeout=%d,",
+			   jiffies_to_msecs(opt->osd_request_timeout) / 1000);
+
+	/* drop redundant comma */
+	if (m->count != pos)
+		m->count--;
+
+	return 0;
+}
+EXPORT_SYMBOL(ceph_print_client_options);
+
+struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
+{
+	return &client->msgr.inst.addr;
+}
+EXPORT_SYMBOL(ceph_client_addr);
+
+u64 ceph_client_gid(struct ceph_client *client)
+{
+	return client->monc.auth->global_id;
+}
+EXPORT_SYMBOL(ceph_client_gid);
+
+/*
+ * create a fresh client instance
+ */
+struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
+{
+	struct ceph_client *client;
+	struct ceph_entity_addr *myaddr = NULL;
+	int err;
+
+	err = wait_for_random_bytes();
+	if (err < 0)
+		return ERR_PTR(err);
+
+	client = kzalloc(sizeof(*client), GFP_KERNEL);
+	if (client == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	client->private = private;
+	client->options = opt;
+
+	mutex_init(&client->mount_mutex);
+	init_waitqueue_head(&client->auth_wq);
+	client->auth_err = 0;
+
+	client->extra_mon_dispatch = NULL;
+	client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
+	client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
+
+	if (!ceph_test_opt(client, NOMSGSIGN))
+		client->required_features |= CEPH_FEATURE_MSG_AUTH;
+
+	/* msgr */
+	if (ceph_test_opt(client, MYIP))
+		myaddr = &client->options->my_addr;
+
+	ceph_messenger_init(&client->msgr, myaddr);
+
+	/* subsystems */
+	err = ceph_monc_init(&client->monc, client);
+	if (err < 0)
+		goto fail;
+	err = ceph_osdc_init(&client->osdc, client);
+	if (err < 0)
+		goto fail_monc;
+
+	return client;
+
+fail_monc:
+	ceph_monc_stop(&client->monc);
+fail:
+	ceph_messenger_fini(&client->msgr);
+	kfree(client);
+	return ERR_PTR(err);
+}
+EXPORT_SYMBOL(ceph_create_client);
+
+void ceph_destroy_client(struct ceph_client *client)
+{
+	dout("destroy_client %p\n", client);
+
+	atomic_set(&client->msgr.stopping, 1);
+
+	/* unmount */
+	ceph_osdc_stop(&client->osdc);
+	ceph_monc_stop(&client->monc);
+	ceph_messenger_fini(&client->msgr);
+
+	ceph_debugfs_client_cleanup(client);
+
+	ceph_destroy_options(client->options);
+
+	kfree(client);
+	dout("destroy_client %p done\n", client);
+}
+EXPORT_SYMBOL(ceph_destroy_client);
+
+void ceph_reset_client_addr(struct ceph_client *client)
+{
+	ceph_messenger_reset_nonce(&client->msgr);
+	ceph_monc_reopen_session(&client->monc);
+	ceph_osdc_reopen_osds(&client->osdc);
+}
+EXPORT_SYMBOL(ceph_reset_client_addr);
+
+/*
+ * true if we have the mon map (and have thus joined the cluster)
+ */
+static bool have_mon_and_osd_map(struct ceph_client *client)
+{
+	return client->monc.monmap && client->monc.monmap->epoch &&
+	       client->osdc.osdmap && client->osdc.osdmap->epoch;
+}
+
+/*
+ * mount: join the ceph cluster, and open root directory.
+ */
+int __ceph_open_session(struct ceph_client *client, unsigned long started)
+{
+	unsigned long timeout = client->options->mount_timeout;
+	long err;
+
+	/* open session, and wait for mon and osd maps */
+	err = ceph_monc_open_session(&client->monc);
+	if (err < 0)
+		return err;
+
+	while (!have_mon_and_osd_map(client)) {
+		if (timeout && time_after_eq(jiffies, started + timeout))
+			return -ETIMEDOUT;
+
+		/* wait */
+		dout("mount waiting for mon_map\n");
+		err = wait_event_interruptible_timeout(client->auth_wq,
+			have_mon_and_osd_map(client) || (client->auth_err < 0),
+			ceph_timeout_jiffies(timeout));
+		if (err < 0)
+			return err;
+		if (client->auth_err < 0)
+			return client->auth_err;
+	}
+
+	pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
+		&client->fsid);
+	ceph_debugfs_client_init(client);
+
+	return 0;
+}
+EXPORT_SYMBOL(__ceph_open_session);
+
+int ceph_open_session(struct ceph_client *client)
+{
+	int ret;
+	unsigned long started = jiffies;  /* note the start time */
+
+	dout("open_session start\n");
+	mutex_lock(&client->mount_mutex);
+
+	ret = __ceph_open_session(client, started);
+
+	mutex_unlock(&client->mount_mutex);
+	return ret;
+}
+EXPORT_SYMBOL(ceph_open_session);
+
+int ceph_wait_for_latest_osdmap(struct ceph_client *client,
+				unsigned long timeout)
+{
+	u64 newest_epoch;
+	int ret;
+
+	ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
+	if (ret)
+		return ret;
+
+	if (client->osdc.osdmap->epoch >= newest_epoch)
+		return 0;
+
+	ceph_osdc_maybe_request_map(&client->osdc);
+	return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
+}
+EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
+
+static int __init init_ceph_lib(void)
+{
+	int ret = 0;
+
+	ceph_debugfs_init();
+
+	ret = ceph_crypto_init();
+	if (ret < 0)
+		goto out_debugfs;
+
+	ret = ceph_msgr_init();
+	if (ret < 0)
+		goto out_crypto;
+
+	ret = ceph_osdc_setup();
+	if (ret < 0)
+		goto out_msgr;
+
+	pr_info("loaded (mon/osd proto %d/%d)\n",
+		CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
+
+	return 0;
+
+out_msgr:
+	ceph_msgr_exit();
+out_crypto:
+	ceph_crypto_shutdown();
+out_debugfs:
+	ceph_debugfs_cleanup();
+	return ret;
+}
+
+static void __exit exit_ceph_lib(void)
+{
+	dout("exit_ceph_lib\n");
+	WARN_ON(!ceph_strings_empty());
+
+	ceph_osdc_cleanup();
+	ceph_msgr_exit();
+	ceph_crypto_shutdown();
+	ceph_debugfs_cleanup();
+}
+
+module_init(init_ceph_lib);
+module_exit(exit_ceph_lib);
+
+MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
+MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
+MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
+MODULE_DESCRIPTION("Ceph core library");
+MODULE_LICENSE("GPL");