/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. */ /* * Fault Management Architecture (FMA) Resource and Protocol Support * * The routines contained herein provide services to support kernel subsystems * in publishing fault management telemetry (see PSARC 2002/412 and 2003/089). * * Name-Value Pair Lists * * The embodiment of an FMA protocol element (event, fmri or authority) is a * name-value pair list (nvlist_t). FMA-specific nvlist constructor and * destructor functions, fm_nvlist_create() and fm_nvlist_destroy(), are used * to create an nvpair list using custom allocators. Callers may choose to * allocate either from the kernel memory allocator, or from a preallocated * buffer, useful in constrained contexts like high-level interrupt routines. * * Protocol Event and FMRI Construction * * Convenience routines are provided to construct nvlist events according to * the FMA Event Protocol and Naming Schema specification for ereports and * FMRIs for the dev, cpu, hc, mem, legacy hc and de schemes. * * ENA Manipulation * * Routines to generate ENA formats 0, 1 and 2 are available as well as * routines to increment formats 1 and 2. Individual fields within the * ENA are extractable via fm_ena_time_get(), fm_ena_id_get(), * fm_ena_format_get() and fm_ena_gen_get(). */ #include <sys/types.h> #include <sys/time.h> #include <sys/list.h> #include <sys/nvpair.h> #include <sys/cmn_err.h> #include <sys/sysmacros.h> #include <sys/sunddi.h> #include <sys/systeminfo.h> #include <sys/fm/util.h> #include <sys/fm/protocol.h> #include <sys/kstat.h> #include <sys/zfs_context.h> #ifdef _KERNEL #include <sys/atomic.h> #include <sys/condvar.h> #include <sys/zfs_ioctl.h> int zfs_zevent_len_max = 512; static int zevent_len_cur = 0; static int zevent_waiters = 0; static int zevent_flags = 0; /* Num events rate limited since the last time zfs_zevent_next() was called */ static uint64_t ratelimit_dropped = 0; /* * The EID (Event IDentifier) is used to uniquely tag a zevent when it is * posted. The posted EIDs are monotonically increasing but not persistent. * They will be reset to the initial value (1) each time the kernel module is * loaded. */ static uint64_t zevent_eid = 0; static kmutex_t zevent_lock; static list_t zevent_list; static kcondvar_t zevent_cv; #endif /* _KERNEL */ /* * Common fault management kstats to record event generation failures */ struct erpt_kstat { kstat_named_t erpt_dropped; /* num erpts dropped on post */ kstat_named_t erpt_set_failed; /* num erpt set failures */ kstat_named_t fmri_set_failed; /* num fmri set failures */ kstat_named_t payload_set_failed; /* num payload set failures */ kstat_named_t erpt_duplicates; /* num duplicate erpts */ }; static struct erpt_kstat erpt_kstat_data = { { "erpt-dropped", KSTAT_DATA_UINT64 }, { "erpt-set-failed", KSTAT_DATA_UINT64 }, { "fmri-set-failed", KSTAT_DATA_UINT64 }, { "payload-set-failed", KSTAT_DATA_UINT64 }, { "erpt-duplicates", KSTAT_DATA_UINT64 } }; kstat_t *fm_ksp; #ifdef _KERNEL static zevent_t * zfs_zevent_alloc(void) { zevent_t *ev; ev = kmem_zalloc(sizeof (zevent_t), KM_SLEEP); list_create(&ev->ev_ze_list, sizeof (zfs_zevent_t), offsetof(zfs_zevent_t, ze_node)); list_link_init(&ev->ev_node); return (ev); } static void zfs_zevent_free(zevent_t *ev) { /* Run provided cleanup callback */ ev->ev_cb(ev->ev_nvl, ev->ev_detector); list_destroy(&ev->ev_ze_list); kmem_free(ev, sizeof (zevent_t)); } static void zfs_zevent_drain(zevent_t *ev) { zfs_zevent_t *ze; ASSERT(MUTEX_HELD(&zevent_lock)); list_remove(&zevent_list, ev); /* Remove references to this event in all private file data */ while ((ze = list_head(&ev->ev_ze_list)) != NULL) { list_remove(&ev->ev_ze_list, ze); ze->ze_zevent = NULL; ze->ze_dropped++; } zfs_zevent_free(ev); } void zfs_zevent_drain_all(int *count) { zevent_t *ev; mutex_enter(&zevent_lock); while ((ev = list_head(&zevent_list)) != NULL) zfs_zevent_drain(ev); *count = zevent_len_cur; zevent_len_cur = 0; mutex_exit(&zevent_lock); } /* * New zevents are inserted at the head. If the maximum queue * length is exceeded a zevent will be drained from the tail. * As part of this any user space processes which currently have * a reference to this zevent_t in their private data will have * this reference set to NULL. */ static void zfs_zevent_insert(zevent_t *ev) { ASSERT(MUTEX_HELD(&zevent_lock)); list_insert_head(&zevent_list, ev); if (zevent_len_cur >= zfs_zevent_len_max) zfs_zevent_drain(list_tail(&zevent_list)); else zevent_len_cur++; } /* * Post a zevent. The cb will be called when nvl and detector are no longer * needed, i.e.: * - An error happened and a zevent can't be posted. In this case, cb is called * before zfs_zevent_post() returns. * - The event is being drained and freed. */ int zfs_zevent_post(nvlist_t *nvl, nvlist_t *detector, zevent_cb_t *cb) { inode_timespec_t tv; int64_t tv_array[2]; uint64_t eid; size_t nvl_size = 0; zevent_t *ev; int error; ASSERT(cb != NULL); gethrestime(&tv); tv_array[0] = tv.tv_sec; tv_array[1] = tv.tv_nsec; error = nvlist_add_int64_array(nvl, FM_EREPORT_TIME, tv_array, 2); if (error) { atomic_inc_64(&erpt_kstat_data.erpt_set_failed.value.ui64); goto out; } eid = atomic_inc_64_nv(&zevent_eid); error = nvlist_add_uint64(nvl, FM_EREPORT_EID, eid); if (error) { atomic_inc_64(&erpt_kstat_data.erpt_set_failed.value.ui64); goto out; } error = nvlist_size(nvl, &nvl_size, NV_ENCODE_NATIVE); if (error) { atomic_inc_64(&erpt_kstat_data.erpt_dropped.value.ui64); goto out; } if (nvl_size > ERPT_DATA_SZ || nvl_size == 0) { atomic_inc_64(&erpt_kstat_data.erpt_dropped.value.ui64); error = EOVERFLOW; goto out; } ev = zfs_zevent_alloc(); if (ev == NULL) { atomic_inc_64(&erpt_kstat_data.erpt_dropped.value.ui64); error = ENOMEM; goto out; } ev->ev_nvl = nvl; ev->ev_detector = detector; ev->ev_cb = cb; ev->ev_eid = eid; mutex_enter(&zevent_lock); zfs_zevent_insert(ev); cv_broadcast(&zevent_cv); mutex_exit(&zevent_lock); out: if (error) cb(nvl, detector); return (error); } void zfs_zevent_track_duplicate(void) { atomic_inc_64(&erpt_kstat_data.erpt_duplicates.value.ui64); } static int zfs_zevent_minor_to_state(minor_t minor, zfs_zevent_t **ze) { *ze = zfsdev_get_state(minor, ZST_ZEVENT); if (*ze == NULL) return (SET_ERROR(EBADF)); return (0); } int zfs_zevent_fd_hold(int fd, minor_t *minorp, zfs_zevent_t **ze) { int error; error = zfsdev_getminor(fd, minorp); if (error == 0) error = zfs_zevent_minor_to_state(*minorp, ze); if (error) zfs_zevent_fd_rele(fd); return (error); } void zfs_zevent_fd_rele(int fd) { zfs_file_put(fd); } /* * Get the next zevent in the stream and place a copy in 'event'. This * may fail with ENOMEM if the encoded nvlist size exceeds the passed * 'event_size'. In this case the stream pointer is not advanced and * and 'event_size' is set to the minimum required buffer size. */ int zfs_zevent_next(zfs_zevent_t *ze, nvlist_t **event, uint64_t *event_size, uint64_t *dropped) { zevent_t *ev; size_t size; int error = 0; mutex_enter(&zevent_lock); if (ze->ze_zevent == NULL) { /* New stream start at the beginning/tail */ ev = list_tail(&zevent_list); if (ev == NULL) { error = ENOENT; goto out; } } else { /* * Existing stream continue with the next element and remove * ourselves from the wait queue for the previous element */ ev = list_prev(&zevent_list, ze->ze_zevent); if (ev == NULL) { error = ENOENT; goto out; } } VERIFY(nvlist_size(ev->ev_nvl, &size, NV_ENCODE_NATIVE) == 0); if (size > *event_size) { *event_size = size; error = ENOMEM; goto out; } if (ze->ze_zevent) list_remove(&ze->ze_zevent->ev_ze_list, ze); ze->ze_zevent = ev; list_insert_head(&ev->ev_ze_list, ze); (void) nvlist_dup(ev->ev_nvl, event, KM_SLEEP); *dropped = ze->ze_dropped; #ifdef _KERNEL /* Include events dropped due to rate limiting */ *dropped += atomic_swap_64(&ratelimit_dropped, 0); #endif ze->ze_dropped = 0; out: mutex_exit(&zevent_lock); return (error); } /* * Wait in an interruptible state for any new events. */ int zfs_zevent_wait(zfs_zevent_t *ze) { int error = EAGAIN; mutex_enter(&zevent_lock); zevent_waiters++; while (error == EAGAIN) { if (zevent_flags & ZEVENT_SHUTDOWN) { error = SET_ERROR(ESHUTDOWN); break; } error = cv_wait_sig(&zevent_cv, &zevent_lock); if (signal_pending(current)) { error = SET_ERROR(EINTR); break; } else if (!list_is_empty(&zevent_list)) { error = 0; continue; } else { error = EAGAIN; } } zevent_waiters--; mutex_exit(&zevent_lock); return (error); } /* * The caller may seek to a specific EID by passing that EID. If the EID * is still available in the posted list of events the cursor is positioned * there. Otherwise ENOENT is returned and the cursor is not moved. * * There are two reserved EIDs which may be passed and will never fail. * ZEVENT_SEEK_START positions the cursor at the start of the list, and * ZEVENT_SEEK_END positions the cursor at the end of the list. */ int zfs_zevent_seek(zfs_zevent_t *ze, uint64_t eid) { zevent_t *ev; int error = 0; mutex_enter(&zevent_lock); if (eid == ZEVENT_SEEK_START) { if (ze->ze_zevent) list_remove(&ze->ze_zevent->ev_ze_list, ze); ze->ze_zevent = NULL; goto out; } if (eid == ZEVENT_SEEK_END) { if (ze->ze_zevent) list_remove(&ze->ze_zevent->ev_ze_list, ze); ev = list_head(&zevent_list); if (ev) { ze->ze_zevent = ev; list_insert_head(&ev->ev_ze_list, ze); } else { ze->ze_zevent = NULL; } goto out; } for (ev = list_tail(&zevent_list); ev != NULL; ev = list_prev(&zevent_list, ev)) { if (ev->ev_eid == eid) { if (ze->ze_zevent) list_remove(&ze->ze_zevent->ev_ze_list, ze); ze->ze_zevent = ev; list_insert_head(&ev->ev_ze_list, ze); break; } } if (ev == NULL) error = ENOENT; out: mutex_exit(&zevent_lock); return (error); } void zfs_zevent_init(zfs_zevent_t **zep) { zfs_zevent_t *ze; ze = *zep = kmem_zalloc(sizeof (zfs_zevent_t), KM_SLEEP); list_link_init(&ze->ze_node); } void zfs_zevent_destroy(zfs_zevent_t *ze) { mutex_enter(&zevent_lock); if (ze->ze_zevent) list_remove(&ze->ze_zevent->ev_ze_list, ze); mutex_exit(&zevent_lock); kmem_free(ze, sizeof (zfs_zevent_t)); } #endif /* _KERNEL */ /* * Wrappers for FM nvlist allocators */ /* ARGSUSED */ static void * i_fm_alloc(nv_alloc_t *nva, size_t size) { return (kmem_zalloc(size, KM_SLEEP)); } /* ARGSUSED */ static void i_fm_free(nv_alloc_t *nva, void *buf, size_t size) { kmem_free(buf, size); } const nv_alloc_ops_t fm_mem_alloc_ops = { .nv_ao_init = NULL, .nv_ao_fini = NULL, .nv_ao_alloc = i_fm_alloc, .nv_ao_free = i_fm_free, .nv_ao_reset = NULL }; /* * Create and initialize a new nv_alloc_t for a fixed buffer, buf. A pointer * to the newly allocated nv_alloc_t structure is returned upon success or NULL * is returned to indicate that the nv_alloc structure could not be created. */ nv_alloc_t * fm_nva_xcreate(char *buf, size_t bufsz) { nv_alloc_t *nvhdl = kmem_zalloc(sizeof (nv_alloc_t), KM_SLEEP); if (bufsz == 0 || nv_alloc_init(nvhdl, nv_fixed_ops, buf, bufsz) != 0) { kmem_free(nvhdl, sizeof (nv_alloc_t)); return (NULL); } return (nvhdl); } /* * Destroy a previously allocated nv_alloc structure. The fixed buffer * associated with nva must be freed by the caller. */ void fm_nva_xdestroy(nv_alloc_t *nva) { nv_alloc_fini(nva); kmem_free(nva, sizeof (nv_alloc_t)); } /* * Create a new nv list. A pointer to a new nv list structure is returned * upon success or NULL is returned to indicate that the structure could * not be created. The newly created nv list is created and managed by the * operations installed in nva. If nva is NULL, the default FMA nva * operations are installed and used. * * When called from the kernel and nva == NULL, this function must be called * from passive kernel context with no locks held that can prevent a * sleeping memory allocation from occurring. Otherwise, this function may * be called from other kernel contexts as long a valid nva created via * fm_nva_create() is supplied. */ nvlist_t * fm_nvlist_create(nv_alloc_t *nva) { int hdl_alloced = 0; nvlist_t *nvl; nv_alloc_t *nvhdl; if (nva == NULL) { nvhdl = kmem_zalloc(sizeof (nv_alloc_t), KM_SLEEP); if (nv_alloc_init(nvhdl, &fm_mem_alloc_ops, NULL, 0) != 0) { kmem_free(nvhdl, sizeof (nv_alloc_t)); return (NULL); } hdl_alloced = 1; } else { nvhdl = nva; } if (nvlist_xalloc(&nvl, NV_UNIQUE_NAME, nvhdl) != 0) { if (hdl_alloced) { nv_alloc_fini(nvhdl); kmem_free(nvhdl, sizeof (nv_alloc_t)); } return (NULL); } return (nvl); } /* * Destroy a previously allocated nvlist structure. flag indicates whether * or not the associated nva structure should be freed (FM_NVA_FREE) or * retained (FM_NVA_RETAIN). Retaining the nv alloc structure allows * it to be re-used for future nvlist creation operations. */ void fm_nvlist_destroy(nvlist_t *nvl, int flag) { nv_alloc_t *nva = nvlist_lookup_nv_alloc(nvl); nvlist_free(nvl); if (nva != NULL) { if (flag == FM_NVA_FREE) fm_nva_xdestroy(nva); } } int i_fm_payload_set(nvlist_t *payload, const char *name, va_list ap) { int nelem, ret = 0; data_type_t type; while (ret == 0 && name != NULL) { type = va_arg(ap, data_type_t); switch (type) { case DATA_TYPE_BYTE: ret = nvlist_add_byte(payload, name, va_arg(ap, uint_t)); break; case DATA_TYPE_BYTE_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_byte_array(payload, name, va_arg(ap, uchar_t *), nelem); break; case DATA_TYPE_BOOLEAN_VALUE: ret = nvlist_add_boolean_value(payload, name, va_arg(ap, boolean_t)); break; case DATA_TYPE_BOOLEAN_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_boolean_array(payload, name, va_arg(ap, boolean_t *), nelem); break; case DATA_TYPE_INT8: ret = nvlist_add_int8(payload, name, va_arg(ap, int)); break; case DATA_TYPE_INT8_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_int8_array(payload, name, va_arg(ap, int8_t *), nelem); break; case DATA_TYPE_UINT8: ret = nvlist_add_uint8(payload, name, va_arg(ap, uint_t)); break; case DATA_TYPE_UINT8_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_uint8_array(payload, name, va_arg(ap, uint8_t *), nelem); break; case DATA_TYPE_INT16: ret = nvlist_add_int16(payload, name, va_arg(ap, int)); break; case DATA_TYPE_INT16_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_int16_array(payload, name, va_arg(ap, int16_t *), nelem); break; case DATA_TYPE_UINT16: ret = nvlist_add_uint16(payload, name, va_arg(ap, uint_t)); break; case DATA_TYPE_UINT16_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_uint16_array(payload, name, va_arg(ap, uint16_t *), nelem); break; case DATA_TYPE_INT32: ret = nvlist_add_int32(payload, name, va_arg(ap, int32_t)); break; case DATA_TYPE_INT32_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_int32_array(payload, name, va_arg(ap, int32_t *), nelem); break; case DATA_TYPE_UINT32: ret = nvlist_add_uint32(payload, name, va_arg(ap, uint32_t)); break; case DATA_TYPE_UINT32_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_uint32_array(payload, name, va_arg(ap, uint32_t *), nelem); break; case DATA_TYPE_INT64: ret = nvlist_add_int64(payload, name, va_arg(ap, int64_t)); break; case DATA_TYPE_INT64_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_int64_array(payload, name, va_arg(ap, int64_t *), nelem); break; case DATA_TYPE_UINT64: ret = nvlist_add_uint64(payload, name, va_arg(ap, uint64_t)); break; case DATA_TYPE_UINT64_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_uint64_array(payload, name, va_arg(ap, uint64_t *), nelem); break; case DATA_TYPE_STRING: ret = nvlist_add_string(payload, name, va_arg(ap, char *)); break; case DATA_TYPE_STRING_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_string_array(payload, name, va_arg(ap, char **), nelem); break; case DATA_TYPE_NVLIST: ret = nvlist_add_nvlist(payload, name, va_arg(ap, nvlist_t *)); break; case DATA_TYPE_NVLIST_ARRAY: nelem = va_arg(ap, int); ret = nvlist_add_nvlist_array(payload, name, va_arg(ap, nvlist_t **), nelem); break; default: ret = EINVAL; } name = va_arg(ap, char *); } return (ret); } void fm_payload_set(nvlist_t *payload, ...) { int ret; const char *name; va_list ap; va_start(ap, payload); name = va_arg(ap, char *); ret = i_fm_payload_set(payload, name, ap); va_end(ap); if (ret) atomic_inc_64(&erpt_kstat_data.payload_set_failed.value.ui64); } /* * Set-up and validate the members of an ereport event according to: * * Member name Type Value * ==================================================== * class string ereport * version uint8_t 0 * ena uint64_t <ena> * detector nvlist_t <detector> * ereport-payload nvlist_t <var args> * * We don't actually add a 'version' member to the payload. Really, * the version quoted to us by our caller is that of the category 1 * "ereport" event class (and we require FM_EREPORT_VERS0) but * the payload version of the actual leaf class event under construction * may be something else. Callers should supply a version in the varargs, * or (better) we could take two version arguments - one for the * ereport category 1 classification (expect FM_EREPORT_VERS0) and one * for the leaf class. */ void fm_ereport_set(nvlist_t *ereport, int version, const char *erpt_class, uint64_t ena, const nvlist_t *detector, ...) { char ereport_class[FM_MAX_CLASS]; const char *name; va_list ap; int ret; if (version != FM_EREPORT_VERS0) { atomic_inc_64(&erpt_kstat_data.erpt_set_failed.value.ui64); return; } (void) snprintf(ereport_class, FM_MAX_CLASS, "%s.%s", FM_EREPORT_CLASS, erpt_class); if (nvlist_add_string(ereport, FM_CLASS, ereport_class) != 0) { atomic_inc_64(&erpt_kstat_data.erpt_set_failed.value.ui64); return; } if (nvlist_add_uint64(ereport, FM_EREPORT_ENA, ena)) { atomic_inc_64(&erpt_kstat_data.erpt_set_failed.value.ui64); } if (nvlist_add_nvlist(ereport, FM_EREPORT_DETECTOR, (nvlist_t *)detector) != 0) { atomic_inc_64(&erpt_kstat_data.erpt_set_failed.value.ui64); } va_start(ap, detector); name = va_arg(ap, const char *); ret = i_fm_payload_set(ereport, name, ap); va_end(ap); if (ret) atomic_inc_64(&erpt_kstat_data.erpt_set_failed.value.ui64); } /* * Set-up and validate the members of an hc fmri according to; * * Member name Type Value * =================================================== * version uint8_t 0 * auth nvlist_t <auth> * hc-name string <name> * hc-id string <id> * * Note that auth and hc-id are optional members. */ #define HC_MAXPAIRS 20 #define HC_MAXNAMELEN 50 static int fm_fmri_hc_set_common(nvlist_t *fmri, int version, const nvlist_t *auth) { if (version != FM_HC_SCHEME_VERSION) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return (0); } if (nvlist_add_uint8(fmri, FM_VERSION, version) != 0 || nvlist_add_string(fmri, FM_FMRI_SCHEME, FM_FMRI_SCHEME_HC) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return (0); } if (auth != NULL && nvlist_add_nvlist(fmri, FM_FMRI_AUTHORITY, (nvlist_t *)auth) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return (0); } return (1); } void fm_fmri_hc_set(nvlist_t *fmri, int version, const nvlist_t *auth, nvlist_t *snvl, int npairs, ...) { nv_alloc_t *nva = nvlist_lookup_nv_alloc(fmri); nvlist_t *pairs[HC_MAXPAIRS]; va_list ap; int i; if (!fm_fmri_hc_set_common(fmri, version, auth)) return; npairs = MIN(npairs, HC_MAXPAIRS); va_start(ap, npairs); for (i = 0; i < npairs; i++) { const char *name = va_arg(ap, const char *); uint32_t id = va_arg(ap, uint32_t); char idstr[11]; (void) snprintf(idstr, sizeof (idstr), "%u", id); pairs[i] = fm_nvlist_create(nva); if (nvlist_add_string(pairs[i], FM_FMRI_HC_NAME, name) != 0 || nvlist_add_string(pairs[i], FM_FMRI_HC_ID, idstr) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); } } va_end(ap); if (nvlist_add_nvlist_array(fmri, FM_FMRI_HC_LIST, pairs, npairs) != 0) atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); for (i = 0; i < npairs; i++) fm_nvlist_destroy(pairs[i], FM_NVA_RETAIN); if (snvl != NULL) { if (nvlist_add_nvlist(fmri, FM_FMRI_HC_SPECIFIC, snvl) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); } } } void fm_fmri_hc_create(nvlist_t *fmri, int version, const nvlist_t *auth, nvlist_t *snvl, nvlist_t *bboard, int npairs, ...) { nv_alloc_t *nva = nvlist_lookup_nv_alloc(fmri); nvlist_t *pairs[HC_MAXPAIRS]; nvlist_t **hcl; uint_t n; int i, j; va_list ap; char *hcname, *hcid; if (!fm_fmri_hc_set_common(fmri, version, auth)) return; /* * copy the bboard nvpairs to the pairs array */ if (nvlist_lookup_nvlist_array(bboard, FM_FMRI_HC_LIST, &hcl, &n) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } for (i = 0; i < n; i++) { if (nvlist_lookup_string(hcl[i], FM_FMRI_HC_NAME, &hcname) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (nvlist_lookup_string(hcl[i], FM_FMRI_HC_ID, &hcid) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); return; } pairs[i] = fm_nvlist_create(nva); if (nvlist_add_string(pairs[i], FM_FMRI_HC_NAME, hcname) != 0 || nvlist_add_string(pairs[i], FM_FMRI_HC_ID, hcid) != 0) { for (j = 0; j <= i; j++) { if (pairs[j] != NULL) fm_nvlist_destroy(pairs[j], FM_NVA_RETAIN); } atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); return; } } /* * create the pairs from passed in pairs */ npairs = MIN(npairs, HC_MAXPAIRS); va_start(ap, npairs); for (i = n; i < npairs + n; i++) { const char *name = va_arg(ap, const char *); uint32_t id = va_arg(ap, uint32_t); char idstr[11]; (void) snprintf(idstr, sizeof (idstr), "%u", id); pairs[i] = fm_nvlist_create(nva); if (nvlist_add_string(pairs[i], FM_FMRI_HC_NAME, name) != 0 || nvlist_add_string(pairs[i], FM_FMRI_HC_ID, idstr) != 0) { for (j = 0; j <= i; j++) { if (pairs[j] != NULL) fm_nvlist_destroy(pairs[j], FM_NVA_RETAIN); } atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); return; } } va_end(ap); /* * Create the fmri hc list */ if (nvlist_add_nvlist_array(fmri, FM_FMRI_HC_LIST, pairs, npairs + n) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } for (i = 0; i < npairs + n; i++) { fm_nvlist_destroy(pairs[i], FM_NVA_RETAIN); } if (snvl != NULL) { if (nvlist_add_nvlist(fmri, FM_FMRI_HC_SPECIFIC, snvl) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); return; } } } /* * Set-up and validate the members of an dev fmri according to: * * Member name Type Value * ==================================================== * version uint8_t 0 * auth nvlist_t <auth> * devpath string <devpath> * [devid] string <devid> * [target-port-l0id] string <target-port-lun0-id> * * Note that auth and devid are optional members. */ void fm_fmri_dev_set(nvlist_t *fmri_dev, int version, const nvlist_t *auth, const char *devpath, const char *devid, const char *tpl0) { int err = 0; if (version != DEV_SCHEME_VERSION0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } err |= nvlist_add_uint8(fmri_dev, FM_VERSION, version); err |= nvlist_add_string(fmri_dev, FM_FMRI_SCHEME, FM_FMRI_SCHEME_DEV); if (auth != NULL) { err |= nvlist_add_nvlist(fmri_dev, FM_FMRI_AUTHORITY, (nvlist_t *)auth); } err |= nvlist_add_string(fmri_dev, FM_FMRI_DEV_PATH, devpath); if (devid != NULL) err |= nvlist_add_string(fmri_dev, FM_FMRI_DEV_ID, devid); if (tpl0 != NULL) err |= nvlist_add_string(fmri_dev, FM_FMRI_DEV_TGTPTLUN0, tpl0); if (err) atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); } /* * Set-up and validate the members of an cpu fmri according to: * * Member name Type Value * ==================================================== * version uint8_t 0 * auth nvlist_t <auth> * cpuid uint32_t <cpu_id> * cpumask uint8_t <cpu_mask> * serial uint64_t <serial_id> * * Note that auth, cpumask, serial are optional members. * */ void fm_fmri_cpu_set(nvlist_t *fmri_cpu, int version, const nvlist_t *auth, uint32_t cpu_id, uint8_t *cpu_maskp, const char *serial_idp) { uint64_t *failedp = &erpt_kstat_data.fmri_set_failed.value.ui64; if (version < CPU_SCHEME_VERSION1) { atomic_inc_64(failedp); return; } if (nvlist_add_uint8(fmri_cpu, FM_VERSION, version) != 0) { atomic_inc_64(failedp); return; } if (nvlist_add_string(fmri_cpu, FM_FMRI_SCHEME, FM_FMRI_SCHEME_CPU) != 0) { atomic_inc_64(failedp); return; } if (auth != NULL && nvlist_add_nvlist(fmri_cpu, FM_FMRI_AUTHORITY, (nvlist_t *)auth) != 0) atomic_inc_64(failedp); if (nvlist_add_uint32(fmri_cpu, FM_FMRI_CPU_ID, cpu_id) != 0) atomic_inc_64(failedp); if (cpu_maskp != NULL && nvlist_add_uint8(fmri_cpu, FM_FMRI_CPU_MASK, *cpu_maskp) != 0) atomic_inc_64(failedp); if (serial_idp == NULL || nvlist_add_string(fmri_cpu, FM_FMRI_CPU_SERIAL_ID, (char *)serial_idp) != 0) atomic_inc_64(failedp); } /* * Set-up and validate the members of a mem according to: * * Member name Type Value * ==================================================== * version uint8_t 0 * auth nvlist_t <auth> [optional] * unum string <unum> * serial string <serial> [optional*] * offset uint64_t <offset> [optional] * * * serial is required if offset is present */ void fm_fmri_mem_set(nvlist_t *fmri, int version, const nvlist_t *auth, const char *unum, const char *serial, uint64_t offset) { if (version != MEM_SCHEME_VERSION0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (!serial && (offset != (uint64_t)-1)) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (nvlist_add_uint8(fmri, FM_VERSION, version) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (nvlist_add_string(fmri, FM_FMRI_SCHEME, FM_FMRI_SCHEME_MEM) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (auth != NULL) { if (nvlist_add_nvlist(fmri, FM_FMRI_AUTHORITY, (nvlist_t *)auth) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); } } if (nvlist_add_string(fmri, FM_FMRI_MEM_UNUM, unum) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); } if (serial != NULL) { if (nvlist_add_string_array(fmri, FM_FMRI_MEM_SERIAL_ID, (char **)&serial, 1) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); } if (offset != (uint64_t)-1 && nvlist_add_uint64(fmri, FM_FMRI_MEM_OFFSET, offset) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); } } } void fm_fmri_zfs_set(nvlist_t *fmri, int version, uint64_t pool_guid, uint64_t vdev_guid) { if (version != ZFS_SCHEME_VERSION0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (nvlist_add_uint8(fmri, FM_VERSION, version) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (nvlist_add_string(fmri, FM_FMRI_SCHEME, FM_FMRI_SCHEME_ZFS) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); return; } if (nvlist_add_uint64(fmri, FM_FMRI_ZFS_POOL, pool_guid) != 0) { atomic_inc_64(&erpt_kstat_data.fmri_set_failed.value.ui64); } if (vdev_guid != 0) { if (nvlist_add_uint64(fmri, FM_FMRI_ZFS_VDEV, vdev_guid) != 0) { atomic_inc_64( &erpt_kstat_data.fmri_set_failed.value.ui64); } } } uint64_t fm_ena_increment(uint64_t ena) { uint64_t new_ena; switch (ENA_FORMAT(ena)) { case FM_ENA_FMT1: new_ena = ena + (1 << ENA_FMT1_GEN_SHFT); break; case FM_ENA_FMT2: new_ena = ena + (1 << ENA_FMT2_GEN_SHFT); break; default: new_ena = 0; } return (new_ena); } uint64_t fm_ena_generate_cpu(uint64_t timestamp, processorid_t cpuid, uchar_t format) { uint64_t ena = 0; switch (format) { case FM_ENA_FMT1: if (timestamp) { ena = (uint64_t)((format & ENA_FORMAT_MASK) | ((cpuid << ENA_FMT1_CPUID_SHFT) & ENA_FMT1_CPUID_MASK) | ((timestamp << ENA_FMT1_TIME_SHFT) & ENA_FMT1_TIME_MASK)); } else { ena = (uint64_t)((format & ENA_FORMAT_MASK) | ((cpuid << ENA_FMT1_CPUID_SHFT) & ENA_FMT1_CPUID_MASK) | ((gethrtime() << ENA_FMT1_TIME_SHFT) & ENA_FMT1_TIME_MASK)); } break; case FM_ENA_FMT2: ena = (uint64_t)((format & ENA_FORMAT_MASK) | ((timestamp << ENA_FMT2_TIME_SHFT) & ENA_FMT2_TIME_MASK)); break; default: break; } return (ena); } uint64_t fm_ena_generate(uint64_t timestamp, uchar_t format) { uint64_t ena; kpreempt_disable(); ena = fm_ena_generate_cpu(timestamp, getcpuid(), format); kpreempt_enable(); return (ena); } uint64_t fm_ena_generation_get(uint64_t ena) { uint64_t gen; switch (ENA_FORMAT(ena)) { case FM_ENA_FMT1: gen = (ena & ENA_FMT1_GEN_MASK) >> ENA_FMT1_GEN_SHFT; break; case FM_ENA_FMT2: gen = (ena & ENA_FMT2_GEN_MASK) >> ENA_FMT2_GEN_SHFT; break; default: gen = 0; break; } return (gen); } uchar_t fm_ena_format_get(uint64_t ena) { return (ENA_FORMAT(ena)); } uint64_t fm_ena_id_get(uint64_t ena) { uint64_t id; switch (ENA_FORMAT(ena)) { case FM_ENA_FMT1: id = (ena & ENA_FMT1_ID_MASK) >> ENA_FMT1_ID_SHFT; break; case FM_ENA_FMT2: id = (ena & ENA_FMT2_ID_MASK) >> ENA_FMT2_ID_SHFT; break; default: id = 0; } return (id); } uint64_t fm_ena_time_get(uint64_t ena) { uint64_t time; switch (ENA_FORMAT(ena)) { case FM_ENA_FMT1: time = (ena & ENA_FMT1_TIME_MASK) >> ENA_FMT1_TIME_SHFT; break; case FM_ENA_FMT2: time = (ena & ENA_FMT2_TIME_MASK) >> ENA_FMT2_TIME_SHFT; break; default: time = 0; } return (time); } #ifdef _KERNEL /* * Helper function to increment ereport dropped count. Used by the event * rate limiting code to give feedback to the user about how many events were * rate limited by including them in the 'dropped' count. */ void fm_erpt_dropped_increment(void) { atomic_inc_64(&ratelimit_dropped); } void fm_init(void) { zevent_len_cur = 0; zevent_flags = 0; /* Initialize zevent allocation and generation kstats */ fm_ksp = kstat_create("zfs", 0, "fm", "misc", KSTAT_TYPE_NAMED, sizeof (struct erpt_kstat) / sizeof (kstat_named_t), KSTAT_FLAG_VIRTUAL); if (fm_ksp != NULL) { fm_ksp->ks_data = &erpt_kstat_data; kstat_install(fm_ksp); } else { cmn_err(CE_NOTE, "failed to create fm/misc kstat\n"); } mutex_init(&zevent_lock, NULL, MUTEX_DEFAULT, NULL); list_create(&zevent_list, sizeof (zevent_t), offsetof(zevent_t, ev_node)); cv_init(&zevent_cv, NULL, CV_DEFAULT, NULL); zfs_ereport_init(); } void fm_fini(void) { int count; zfs_ereport_fini(); zfs_zevent_drain_all(&count); mutex_enter(&zevent_lock); cv_broadcast(&zevent_cv); zevent_flags |= ZEVENT_SHUTDOWN; while (zevent_waiters > 0) { mutex_exit(&zevent_lock); schedule(); mutex_enter(&zevent_lock); } mutex_exit(&zevent_lock); cv_destroy(&zevent_cv); list_destroy(&zevent_list); mutex_destroy(&zevent_lock); if (fm_ksp != NULL) { kstat_delete(fm_ksp); fm_ksp = NULL; } } #endif /* _KERNEL */ ZFS_MODULE_PARAM(zfs_zevent, zfs_zevent_, len_max, INT, ZMOD_RW, "Max event queue length");