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/xfs/xfs_sysfs.c | 731 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 731 insertions(+) create mode 100644 fs/xfs/xfs_sysfs.c (limited to 'fs/xfs/xfs_sysfs.c') diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c new file mode 100644 index 000000000..f7faf6e70 --- /dev/null +++ b/fs/xfs/xfs_sysfs.c @@ -0,0 +1,731 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2014 Red Hat, Inc. + * All Rights Reserved. + */ + +#include "xfs.h" +#include "xfs_shared.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" +#include "xfs_sysfs.h" +#include "xfs_log.h" +#include "xfs_log_priv.h" +#include "xfs_mount.h" + +struct xfs_sysfs_attr { + struct attribute attr; + ssize_t (*show)(struct kobject *kobject, char *buf); + ssize_t (*store)(struct kobject *kobject, const char *buf, + size_t count); +}; + +static inline struct xfs_sysfs_attr * +to_attr(struct attribute *attr) +{ + return container_of(attr, struct xfs_sysfs_attr, attr); +} + +#define XFS_SYSFS_ATTR_RW(name) \ + static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RW(name) +#define XFS_SYSFS_ATTR_RO(name) \ + static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_RO(name) +#define XFS_SYSFS_ATTR_WO(name) \ + static struct xfs_sysfs_attr xfs_sysfs_attr_##name = __ATTR_WO(name) + +#define ATTR_LIST(name) &xfs_sysfs_attr_##name.attr + +STATIC ssize_t +xfs_sysfs_object_show( + struct kobject *kobject, + struct attribute *attr, + char *buf) +{ + struct xfs_sysfs_attr *xfs_attr = to_attr(attr); + + return xfs_attr->show ? xfs_attr->show(kobject, buf) : 0; +} + +STATIC ssize_t +xfs_sysfs_object_store( + struct kobject *kobject, + struct attribute *attr, + const char *buf, + size_t count) +{ + struct xfs_sysfs_attr *xfs_attr = to_attr(attr); + + return xfs_attr->store ? xfs_attr->store(kobject, buf, count) : 0; +} + +static const struct sysfs_ops xfs_sysfs_ops = { + .show = xfs_sysfs_object_show, + .store = xfs_sysfs_object_store, +}; + +static struct attribute *xfs_mp_attrs[] = { + NULL, +}; +ATTRIBUTE_GROUPS(xfs_mp); + +struct kobj_type xfs_mp_ktype = { + .release = xfs_sysfs_release, + .sysfs_ops = &xfs_sysfs_ops, + .default_groups = xfs_mp_groups, +}; + +#ifdef DEBUG +/* debug */ + +STATIC ssize_t +bug_on_assert_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val == 1) + xfs_globals.bug_on_assert = true; + else if (val == 0) + xfs_globals.bug_on_assert = false; + else + return -EINVAL; + + return count; +} + +STATIC ssize_t +bug_on_assert_show( + struct kobject *kobject, + char *buf) +{ + return sysfs_emit(buf, "%d\n", xfs_globals.bug_on_assert); +} +XFS_SYSFS_ATTR_RW(bug_on_assert); + +STATIC ssize_t +log_recovery_delay_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val < 0 || val > 60) + return -EINVAL; + + xfs_globals.log_recovery_delay = val; + + return count; +} + +STATIC ssize_t +log_recovery_delay_show( + struct kobject *kobject, + char *buf) +{ + return sysfs_emit(buf, "%d\n", xfs_globals.log_recovery_delay); +} +XFS_SYSFS_ATTR_RW(log_recovery_delay); + +STATIC ssize_t +mount_delay_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val < 0 || val > 60) + return -EINVAL; + + xfs_globals.mount_delay = val; + + return count; +} + +STATIC ssize_t +mount_delay_show( + struct kobject *kobject, + char *buf) +{ + return sysfs_emit(buf, "%d\n", xfs_globals.mount_delay); +} +XFS_SYSFS_ATTR_RW(mount_delay); + +static ssize_t +always_cow_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + ssize_t ret; + + ret = kstrtobool(buf, &xfs_globals.always_cow); + if (ret < 0) + return ret; + return count; +} + +static ssize_t +always_cow_show( + struct kobject *kobject, + char *buf) +{ + return sysfs_emit(buf, "%d\n", xfs_globals.always_cow); +} +XFS_SYSFS_ATTR_RW(always_cow); + +#ifdef DEBUG +/* + * Override how many threads the parallel work queue is allowed to create. + * This has to be a debug-only global (instead of an errortag) because one of + * the main users of parallel workqueues is mount time quotacheck. + */ +STATIC ssize_t +pwork_threads_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val < -1 || val > num_possible_cpus()) + return -EINVAL; + + xfs_globals.pwork_threads = val; + + return count; +} + +STATIC ssize_t +pwork_threads_show( + struct kobject *kobject, + char *buf) +{ + return sysfs_emit(buf, "%d\n", xfs_globals.pwork_threads); +} +XFS_SYSFS_ATTR_RW(pwork_threads); + +static ssize_t +larp_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + ssize_t ret; + + ret = kstrtobool(buf, &xfs_globals.larp); + if (ret < 0) + return ret; + return count; +} + +STATIC ssize_t +larp_show( + struct kobject *kobject, + char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.larp); +} +XFS_SYSFS_ATTR_RW(larp); +#endif /* DEBUG */ + +static struct attribute *xfs_dbg_attrs[] = { + ATTR_LIST(bug_on_assert), + ATTR_LIST(log_recovery_delay), + ATTR_LIST(mount_delay), + ATTR_LIST(always_cow), +#ifdef DEBUG + ATTR_LIST(pwork_threads), + ATTR_LIST(larp), +#endif + NULL, +}; +ATTRIBUTE_GROUPS(xfs_dbg); + +struct kobj_type xfs_dbg_ktype = { + .release = xfs_sysfs_release, + .sysfs_ops = &xfs_sysfs_ops, + .default_groups = xfs_dbg_groups, +}; + +#endif /* DEBUG */ + +/* stats */ + +static inline struct xstats * +to_xstats(struct kobject *kobject) +{ + struct xfs_kobj *kobj = to_kobj(kobject); + + return container_of(kobj, struct xstats, xs_kobj); +} + +STATIC ssize_t +stats_show( + struct kobject *kobject, + char *buf) +{ + struct xstats *stats = to_xstats(kobject); + + return xfs_stats_format(stats->xs_stats, buf); +} +XFS_SYSFS_ATTR_RO(stats); + +STATIC ssize_t +stats_clear_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + int ret; + int val; + struct xstats *stats = to_xstats(kobject); + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val != 1) + return -EINVAL; + + xfs_stats_clearall(stats->xs_stats); + return count; +} +XFS_SYSFS_ATTR_WO(stats_clear); + +static struct attribute *xfs_stats_attrs[] = { + ATTR_LIST(stats), + ATTR_LIST(stats_clear), + NULL, +}; +ATTRIBUTE_GROUPS(xfs_stats); + +struct kobj_type xfs_stats_ktype = { + .release = xfs_sysfs_release, + .sysfs_ops = &xfs_sysfs_ops, + .default_groups = xfs_stats_groups, +}; + +/* xlog */ + +static inline struct xlog * +to_xlog(struct kobject *kobject) +{ + struct xfs_kobj *kobj = to_kobj(kobject); + + return container_of(kobj, struct xlog, l_kobj); +} + +STATIC ssize_t +log_head_lsn_show( + struct kobject *kobject, + char *buf) +{ + int cycle; + int block; + struct xlog *log = to_xlog(kobject); + + spin_lock(&log->l_icloglock); + cycle = log->l_curr_cycle; + block = log->l_curr_block; + spin_unlock(&log->l_icloglock); + + return sysfs_emit(buf, "%d:%d\n", cycle, block); +} +XFS_SYSFS_ATTR_RO(log_head_lsn); + +STATIC ssize_t +log_tail_lsn_show( + struct kobject *kobject, + char *buf) +{ + int cycle; + int block; + struct xlog *log = to_xlog(kobject); + + xlog_crack_atomic_lsn(&log->l_tail_lsn, &cycle, &block); + return sysfs_emit(buf, "%d:%d\n", cycle, block); +} +XFS_SYSFS_ATTR_RO(log_tail_lsn); + +STATIC ssize_t +reserve_grant_head_show( + struct kobject *kobject, + char *buf) + +{ + int cycle; + int bytes; + struct xlog *log = to_xlog(kobject); + + xlog_crack_grant_head(&log->l_reserve_head.grant, &cycle, &bytes); + return sysfs_emit(buf, "%d:%d\n", cycle, bytes); +} +XFS_SYSFS_ATTR_RO(reserve_grant_head); + +STATIC ssize_t +write_grant_head_show( + struct kobject *kobject, + char *buf) +{ + int cycle; + int bytes; + struct xlog *log = to_xlog(kobject); + + xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &bytes); + return sysfs_emit(buf, "%d:%d\n", cycle, bytes); +} +XFS_SYSFS_ATTR_RO(write_grant_head); + +static struct attribute *xfs_log_attrs[] = { + ATTR_LIST(log_head_lsn), + ATTR_LIST(log_tail_lsn), + ATTR_LIST(reserve_grant_head), + ATTR_LIST(write_grant_head), + NULL, +}; +ATTRIBUTE_GROUPS(xfs_log); + +struct kobj_type xfs_log_ktype = { + .release = xfs_sysfs_release, + .sysfs_ops = &xfs_sysfs_ops, + .default_groups = xfs_log_groups, +}; + +/* + * Metadata IO error configuration + * + * The sysfs structure here is: + * ...xfs//error/// + * + * where allows us to discriminate between data IO and metadata IO, + * and any other future type of IO (e.g. special inode or directory error + * handling) we care to support. + */ +static inline struct xfs_error_cfg * +to_error_cfg(struct kobject *kobject) +{ + struct xfs_kobj *kobj = to_kobj(kobject); + return container_of(kobj, struct xfs_error_cfg, kobj); +} + +static inline struct xfs_mount * +err_to_mp(struct kobject *kobject) +{ + struct xfs_kobj *kobj = to_kobj(kobject); + return container_of(kobj, struct xfs_mount, m_error_kobj); +} + +static ssize_t +max_retries_show( + struct kobject *kobject, + char *buf) +{ + int retries; + struct xfs_error_cfg *cfg = to_error_cfg(kobject); + + if (cfg->max_retries == XFS_ERR_RETRY_FOREVER) + retries = -1; + else + retries = cfg->max_retries; + + return sysfs_emit(buf, "%d\n", retries); +} + +static ssize_t +max_retries_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + struct xfs_error_cfg *cfg = to_error_cfg(kobject); + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val < -1) + return -EINVAL; + + if (val == -1) + cfg->max_retries = XFS_ERR_RETRY_FOREVER; + else + cfg->max_retries = val; + return count; +} +XFS_SYSFS_ATTR_RW(max_retries); + +static ssize_t +retry_timeout_seconds_show( + struct kobject *kobject, + char *buf) +{ + int timeout; + struct xfs_error_cfg *cfg = to_error_cfg(kobject); + + if (cfg->retry_timeout == XFS_ERR_RETRY_FOREVER) + timeout = -1; + else + timeout = jiffies_to_msecs(cfg->retry_timeout) / MSEC_PER_SEC; + + return sysfs_emit(buf, "%d\n", timeout); +} + +static ssize_t +retry_timeout_seconds_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + struct xfs_error_cfg *cfg = to_error_cfg(kobject); + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + /* 1 day timeout maximum, -1 means infinite */ + if (val < -1 || val > 86400) + return -EINVAL; + + if (val == -1) + cfg->retry_timeout = XFS_ERR_RETRY_FOREVER; + else { + cfg->retry_timeout = msecs_to_jiffies(val * MSEC_PER_SEC); + ASSERT(msecs_to_jiffies(val * MSEC_PER_SEC) < LONG_MAX); + } + return count; +} +XFS_SYSFS_ATTR_RW(retry_timeout_seconds); + +static ssize_t +fail_at_unmount_show( + struct kobject *kobject, + char *buf) +{ + struct xfs_mount *mp = err_to_mp(kobject); + + return sysfs_emit(buf, "%d\n", mp->m_fail_unmount); +} + +static ssize_t +fail_at_unmount_store( + struct kobject *kobject, + const char *buf, + size_t count) +{ + struct xfs_mount *mp = err_to_mp(kobject); + int ret; + int val; + + ret = kstrtoint(buf, 0, &val); + if (ret) + return ret; + + if (val < 0 || val > 1) + return -EINVAL; + + mp->m_fail_unmount = val; + return count; +} +XFS_SYSFS_ATTR_RW(fail_at_unmount); + +static struct attribute *xfs_error_attrs[] = { + ATTR_LIST(max_retries), + ATTR_LIST(retry_timeout_seconds), + NULL, +}; +ATTRIBUTE_GROUPS(xfs_error); + +static struct kobj_type xfs_error_cfg_ktype = { + .release = xfs_sysfs_release, + .sysfs_ops = &xfs_sysfs_ops, + .default_groups = xfs_error_groups, +}; + +static struct kobj_type xfs_error_ktype = { + .release = xfs_sysfs_release, + .sysfs_ops = &xfs_sysfs_ops, +}; + +/* + * Error initialization tables. These need to be ordered in the same + * order as the enums used to index the array. All class init tables need to + * define a "default" behaviour as the first entry, all other entries can be + * empty. + */ +struct xfs_error_init { + char *name; + int max_retries; + int retry_timeout; /* in seconds */ +}; + +static const struct xfs_error_init xfs_error_meta_init[XFS_ERR_ERRNO_MAX] = { + { .name = "default", + .max_retries = XFS_ERR_RETRY_FOREVER, + .retry_timeout = XFS_ERR_RETRY_FOREVER, + }, + { .name = "EIO", + .max_retries = XFS_ERR_RETRY_FOREVER, + .retry_timeout = XFS_ERR_RETRY_FOREVER, + }, + { .name = "ENOSPC", + .max_retries = XFS_ERR_RETRY_FOREVER, + .retry_timeout = XFS_ERR_RETRY_FOREVER, + }, + { .name = "ENODEV", + .max_retries = 0, /* We can't recover from devices disappearing */ + .retry_timeout = 0, + }, +}; + +static int +xfs_error_sysfs_init_class( + struct xfs_mount *mp, + int class, + const char *parent_name, + struct xfs_kobj *parent_kobj, + const struct xfs_error_init init[]) +{ + struct xfs_error_cfg *cfg; + int error; + int i; + + ASSERT(class < XFS_ERR_CLASS_MAX); + + error = xfs_sysfs_init(parent_kobj, &xfs_error_ktype, + &mp->m_error_kobj, parent_name); + if (error) + return error; + + for (i = 0; i < XFS_ERR_ERRNO_MAX; i++) { + cfg = &mp->m_error_cfg[class][i]; + error = xfs_sysfs_init(&cfg->kobj, &xfs_error_cfg_ktype, + parent_kobj, init[i].name); + if (error) + goto out_error; + + cfg->max_retries = init[i].max_retries; + if (init[i].retry_timeout == XFS_ERR_RETRY_FOREVER) + cfg->retry_timeout = XFS_ERR_RETRY_FOREVER; + else + cfg->retry_timeout = msecs_to_jiffies( + init[i].retry_timeout * MSEC_PER_SEC); + } + return 0; + +out_error: + /* unwind the entries that succeeded */ + for (i--; i >= 0; i--) { + cfg = &mp->m_error_cfg[class][i]; + xfs_sysfs_del(&cfg->kobj); + } + xfs_sysfs_del(parent_kobj); + return error; +} + +int +xfs_error_sysfs_init( + struct xfs_mount *mp) +{ + int error; + + /* .../xfs//error/ */ + error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype, + &mp->m_kobj, "error"); + if (error) + return error; + + error = sysfs_create_file(&mp->m_error_kobj.kobject, + ATTR_LIST(fail_at_unmount)); + + if (error) + goto out_error; + + /* .../xfs//error/metadata/ */ + error = xfs_error_sysfs_init_class(mp, XFS_ERR_METADATA, + "metadata", &mp->m_error_meta_kobj, + xfs_error_meta_init); + if (error) + goto out_error; + + return 0; + +out_error: + xfs_sysfs_del(&mp->m_error_kobj); + return error; +} + +void +xfs_error_sysfs_del( + struct xfs_mount *mp) +{ + struct xfs_error_cfg *cfg; + int i, j; + + for (i = 0; i < XFS_ERR_CLASS_MAX; i++) { + for (j = 0; j < XFS_ERR_ERRNO_MAX; j++) { + cfg = &mp->m_error_cfg[i][j]; + + xfs_sysfs_del(&cfg->kobj); + } + } + xfs_sysfs_del(&mp->m_error_meta_kobj); + xfs_sysfs_del(&mp->m_error_kobj); +} + +struct xfs_error_cfg * +xfs_error_get_cfg( + struct xfs_mount *mp, + int error_class, + int error) +{ + struct xfs_error_cfg *cfg; + + if (error < 0) + error = -error; + + switch (error) { + case EIO: + cfg = &mp->m_error_cfg[error_class][XFS_ERR_EIO]; + break; + case ENOSPC: + cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENOSPC]; + break; + case ENODEV: + cfg = &mp->m_error_cfg[error_class][XFS_ERR_ENODEV]; + break; + default: + cfg = &mp->m_error_cfg[error_class][XFS_ERR_DEFAULT]; + break; + } + + return cfg; +} -- cgit v1.2.3