diff options
Diffstat (limited to 'module/zfs/fm.c')
| -rw-r--r-- | module/zfs/fm.c | 1674 |
1 files changed, 1674 insertions, 0 deletions
diff --git a/module/zfs/fm.c b/module/zfs/fm.c new file mode 100644 index 000000000000..c00e08b8d02a --- /dev/null +++ b/module/zfs/fm.c @@ -0,0 +1,1674 @@ +/* + * 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/console.h> +#include <sys/time.h> +#include <sys/zfs_ioctl.h> + +int zfs_zevent_len_max = 0; +int zfs_zevent_cols = 80; +int zfs_zevent_console = 0; + +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 */ +}; + +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 } +}; + +kstat_t *fm_ksp; + +#ifdef _KERNEL + +/* + * Formatting utility function for fm_nvprintr. We attempt to wrap chunks of + * output so they aren't split across console lines, and return the end column. + */ +/*PRINTFLIKE4*/ +static int +fm_printf(int depth, int c, int cols, const char *format, ...) +{ + va_list ap; + int width; + char c1; + + va_start(ap, format); + width = vsnprintf(&c1, sizeof (c1), format, ap); + va_end(ap); + + if (c + width >= cols) { + console_printf("\n"); + c = 0; + if (format[0] != ' ' && depth > 0) { + console_printf(" "); + c++; + } + } + + va_start(ap, format); + console_vprintf(format, ap); + va_end(ap); + + return ((c + width) % cols); +} + +/* + * Recursively print an nvlist in the specified column width and return the + * column we end up in. This function is called recursively by fm_nvprint(), + * below. We generically format the entire nvpair using hexadecimal + * integers and strings, and elide any integer arrays. Arrays are basically + * used for cache dumps right now, so we suppress them so as not to overwhelm + * the amount of console output we produce at panic time. This can be further + * enhanced as FMA technology grows based upon the needs of consumers. All + * FMA telemetry is logged using the dump device transport, so the console + * output serves only as a fallback in case this procedure is unsuccessful. + */ +static int +fm_nvprintr(nvlist_t *nvl, int d, int c, int cols) +{ + nvpair_t *nvp; + + for (nvp = nvlist_next_nvpair(nvl, NULL); + nvp != NULL; nvp = nvlist_next_nvpair(nvl, nvp)) { + + data_type_t type = nvpair_type(nvp); + const char *name = nvpair_name(nvp); + + boolean_t b; + uint8_t i8; + uint16_t i16; + uint32_t i32; + uint64_t i64; + char *str; + nvlist_t *cnv; + + if (strcmp(name, FM_CLASS) == 0) + continue; /* already printed by caller */ + + c = fm_printf(d, c, cols, " %s=", name); + + switch (type) { + case DATA_TYPE_BOOLEAN: + c = fm_printf(d + 1, c, cols, " 1"); + break; + + case DATA_TYPE_BOOLEAN_VALUE: + (void) nvpair_value_boolean_value(nvp, &b); + c = fm_printf(d + 1, c, cols, b ? "1" : "0"); + break; + + case DATA_TYPE_BYTE: + (void) nvpair_value_byte(nvp, &i8); + c = fm_printf(d + 1, c, cols, "0x%x", i8); + break; + + case DATA_TYPE_INT8: + (void) nvpair_value_int8(nvp, (void *)&i8); + c = fm_printf(d + 1, c, cols, "0x%x", i8); + break; + + case DATA_TYPE_UINT8: + (void) nvpair_value_uint8(nvp, &i8); + c = fm_printf(d + 1, c, cols, "0x%x", i8); + break; + + case DATA_TYPE_INT16: + (void) nvpair_value_int16(nvp, (void *)&i16); + c = fm_printf(d + 1, c, cols, "0x%x", i16); + break; + + case DATA_TYPE_UINT16: + (void) nvpair_value_uint16(nvp, &i16); + c = fm_printf(d + 1, c, cols, "0x%x", i16); + break; + + case DATA_TYPE_INT32: + (void) nvpair_value_int32(nvp, (void *)&i32); + c = fm_printf(d + 1, c, cols, "0x%x", i32); + break; + + case DATA_TYPE_UINT32: + (void) nvpair_value_uint32(nvp, &i32); + c = fm_printf(d + 1, c, cols, "0x%x", i32); + break; + + case DATA_TYPE_INT64: + (void) nvpair_value_int64(nvp, (void *)&i64); + c = fm_printf(d + 1, c, cols, "0x%llx", + (u_longlong_t)i64); + break; + + case DATA_TYPE_UINT64: + (void) nvpair_value_uint64(nvp, &i64); + c = fm_printf(d + 1, c, cols, "0x%llx", + (u_longlong_t)i64); + break; + + case DATA_TYPE_HRTIME: + (void) nvpair_value_hrtime(nvp, (void *)&i64); + c = fm_printf(d + 1, c, cols, "0x%llx", + (u_longlong_t)i64); + break; + + case DATA_TYPE_STRING: + (void) nvpair_value_string(nvp, &str); + c = fm_printf(d + 1, c, cols, "\"%s\"", + str ? str : "<NULL>"); + break; + + case DATA_TYPE_NVLIST: + c = fm_printf(d + 1, c, cols, "["); + (void) nvpair_value_nvlist(nvp, &cnv); + c = fm_nvprintr(cnv, d + 1, c, cols); + c = fm_printf(d + 1, c, cols, " ]"); + break; + + case DATA_TYPE_NVLIST_ARRAY: { + nvlist_t **val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "["); + (void) nvpair_value_nvlist_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) { + c = fm_nvprintr(val[i], d + 1, c, cols); + } + c = fm_printf(d + 1, c, cols, " ]"); + } + break; + + case DATA_TYPE_INT8_ARRAY: { + int8_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_int8_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_UINT8_ARRAY: { + uint8_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_uint8_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_INT16_ARRAY: { + int16_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_int16_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_UINT16_ARRAY: { + uint16_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_uint16_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_INT32_ARRAY: { + int32_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_int32_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_UINT32_ARRAY: { + uint32_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_uint32_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_INT64_ARRAY: { + int64_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_int64_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_UINT64_ARRAY: { + uint64_t *val; + uint_t i, nelem; + + c = fm_printf(d + 1, c, cols, "[ "); + (void) nvpair_value_uint64_array(nvp, &val, &nelem); + for (i = 0; i < nelem; i++) + c = fm_printf(d + 1, c, cols, "0x%llx ", + (u_longlong_t)val[i]); + + c = fm_printf(d + 1, c, cols, "]"); + break; + } + + case DATA_TYPE_STRING_ARRAY: + case DATA_TYPE_BOOLEAN_ARRAY: + case DATA_TYPE_BYTE_ARRAY: + c = fm_printf(d + 1, c, cols, "[...]"); + break; + + case DATA_TYPE_UNKNOWN: + case DATA_TYPE_DONTCARE: + c = fm_printf(d + 1, c, cols, "<unknown>"); + break; + } + } + + return (c); +} + +void +fm_nvprint(nvlist_t *nvl) +{ + char *class; + int c = 0; + + console_printf("\n"); + + if (nvlist_lookup_string(nvl, FM_CLASS, &class) == 0) + c = fm_printf(0, c, zfs_zevent_cols, "%s", class); + + if (fm_nvprintr(nvl, 0, c, zfs_zevent_cols) != 0) + console_printf("\n"); + + console_printf("\n"); +} + +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; + } + + if (zfs_zevent_console) + fm_nvprint(nvl); + + 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); +} + +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 += ratelimit_dropped; + 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; + + if (zfs_zevent_len_max == 0) + zfs_zevent_len_max = ERPT_MAX_ERRS * MAX(max_ncpus, 4); + + /* 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); +} + +void +fm_fini(void) +{ + int count; + + 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"); + +ZFS_MODULE_PARAM(zfs_zevent, zfs_zevent_, cols, INT, ZMOD_RW, + "Max event column width"); + +ZFS_MODULE_PARAM(zfs_zevent, zfs_zevent_, console, INT, ZMOD_RW, + "Log events to the console"); |