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Signed-off-by: Prakash Surya <surya1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#2874
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| dnl # | ||
| dnl # Ensure the DECLARE_EVENT_CLASS macro is available to non-GPL modules. | ||
| dnl # | ||
| AC_DEFUN([ZFS_AC_KERNEL_DECLARE_EVENT_CLASS], [ | ||
| tmp_flags="$EXTRA_KCFLAGS" | ||
| EXTRA_KCFLAGS="-I\$(src)" | ||
| AC_MSG_CHECKING([whether DECLARE_EVENT_CLASS() is available]) | ||
| ZFS_LINUX_TRY_COMPILE_HEADER([ | ||
| #include <linux/module.h> | ||
| MODULE_LICENSE(ZFS_META_LICENSE); | ||
| #define CREATE_TRACE_POINTS | ||
| #include "conftest.h" | ||
| ],[ | ||
| trace_zfs_autoconf_event_one(1UL); | ||
| trace_zfs_autoconf_event_two(2UL); | ||
| ],[ | ||
| AC_MSG_RESULT(yes) | ||
| AC_DEFINE(HAVE_DECLARE_EVENT_CLASS, 1, | ||
| [DECLARE_EVENT_CLASS() is available]) | ||
| ],[ | ||
| AC_MSG_RESULT(no) | ||
| ],[ | ||
| #if !defined(_CONFTEST_H) || defined(TRACE_HEADER_MULTI_READ) | ||
| #define _CONFTEST_H | ||
| #undef TRACE_SYSTEM | ||
| #define TRACE_SYSTEM zfs | ||
| #include <linux/tracepoint.h> | ||
| DECLARE_EVENT_CLASS(zfs_autoconf_event_class, | ||
| TP_PROTO(unsigned long i), | ||
| TP_ARGS(i), | ||
| TP_STRUCT__entry( | ||
| __field(unsigned long, i) | ||
| ), | ||
| TP_fast_assign( | ||
| __entry->i = i; | ||
| ), | ||
| TP_printk("i = %lu", __entry->i) | ||
| ); | ||
| #define DEFINE_AUTOCONF_EVENT(name) \ | ||
| DEFINE_EVENT(zfs_autoconf_event_class, name, \ | ||
| TP_PROTO(unsigned long i), \ | ||
| TP_ARGS(i)) | ||
| DEFINE_AUTOCONF_EVENT(zfs_autoconf_event_one); | ||
| DEFINE_AUTOCONF_EVENT(zfs_autoconf_event_two); | ||
| #endif /* _CONFTEST_H */ | ||
| #undef TRACE_INCLUDE_PATH | ||
| #define TRACE_INCLUDE_PATH . | ||
| #define TRACE_INCLUDE_FILE conftest | ||
| #include <trace/define_trace.h> | ||
| ]) | ||
| EXTRA_KCFLAGS="$tmp_flags" | ||
| ]) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| /* | ||
| * 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| * Copyright (c) 2013 by Delphix. All rights reserved. | ||
| * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. | ||
| * Copyright 2013 Nexenta Systems, Inc. All rights reserved. | ||
| */ | ||
|
|
||
| #ifndef _SYS_ARC_IMPL_H | ||
| #define _SYS_ARC_IMPL_H | ||
|
|
||
| #include <sys/arc.h> | ||
|
|
||
| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
|
|
||
| /* | ||
| * Note that buffers can be in one of 6 states: | ||
| * ARC_anon - anonymous (discussed below) | ||
| * ARC_mru - recently used, currently cached | ||
| * ARC_mru_ghost - recentely used, no longer in cache | ||
| * ARC_mfu - frequently used, currently cached | ||
| * ARC_mfu_ghost - frequently used, no longer in cache | ||
| * ARC_l2c_only - exists in L2ARC but not other states | ||
| * When there are no active references to the buffer, they are | ||
| * are linked onto a list in one of these arc states. These are | ||
| * the only buffers that can be evicted or deleted. Within each | ||
| * state there are multiple lists, one for meta-data and one for | ||
| * non-meta-data. Meta-data (indirect blocks, blocks of dnodes, | ||
| * etc.) is tracked separately so that it can be managed more | ||
| * explicitly: favored over data, limited explicitly. | ||
| * | ||
| * Anonymous buffers are buffers that are not associated with | ||
| * a DVA. These are buffers that hold dirty block copies | ||
| * before they are written to stable storage. By definition, | ||
| * they are "ref'd" and are considered part of arc_mru | ||
| * that cannot be freed. Generally, they will aquire a DVA | ||
| * as they are written and migrate onto the arc_mru list. | ||
| * | ||
| * The ARC_l2c_only state is for buffers that are in the second | ||
| * level ARC but no longer in any of the ARC_m* lists. The second | ||
| * level ARC itself may also contain buffers that are in any of | ||
| * the ARC_m* states - meaning that a buffer can exist in two | ||
| * places. The reason for the ARC_l2c_only state is to keep the | ||
| * buffer header in the hash table, so that reads that hit the | ||
| * second level ARC benefit from these fast lookups. | ||
| */ | ||
|
|
||
| typedef struct arc_state { | ||
| list_t arcs_list[ARC_BUFC_NUMTYPES]; /* list of evictable buffers */ | ||
| uint64_t arcs_lsize[ARC_BUFC_NUMTYPES]; /* amount of evictable data */ | ||
| uint64_t arcs_size; /* total amount of data in this state */ | ||
| kmutex_t arcs_mtx; | ||
| arc_state_type_t arcs_state; | ||
| } arc_state_t; | ||
|
|
||
| typedef struct l2arc_buf_hdr l2arc_buf_hdr_t; | ||
|
|
||
| typedef struct arc_callback arc_callback_t; | ||
|
|
||
| struct arc_callback { | ||
| void *acb_private; | ||
| arc_done_func_t *acb_done; | ||
| arc_buf_t *acb_buf; | ||
| zio_t *acb_zio_dummy; | ||
| arc_callback_t *acb_next; | ||
| }; | ||
|
|
||
| typedef struct arc_write_callback arc_write_callback_t; | ||
|
|
||
| struct arc_write_callback { | ||
| void *awcb_private; | ||
| arc_done_func_t *awcb_ready; | ||
| arc_done_func_t *awcb_physdone; | ||
| arc_done_func_t *awcb_done; | ||
| arc_buf_t *awcb_buf; | ||
| }; | ||
|
|
||
| struct arc_buf_hdr { | ||
| /* protected by hash lock */ | ||
| dva_t b_dva; | ||
| uint64_t b_birth; | ||
| uint64_t b_cksum0; | ||
|
|
||
| kmutex_t b_freeze_lock; | ||
| zio_cksum_t *b_freeze_cksum; | ||
|
|
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| arc_buf_hdr_t *b_hash_next; | ||
| arc_buf_t *b_buf; | ||
| uint32_t b_flags; | ||
| uint32_t b_datacnt; | ||
|
|
||
| arc_callback_t *b_acb; | ||
| kcondvar_t b_cv; | ||
|
|
||
| /* immutable */ | ||
| arc_buf_contents_t b_type; | ||
| uint64_t b_size; | ||
| uint64_t b_spa; | ||
|
|
||
| /* protected by arc state mutex */ | ||
| arc_state_t *b_state; | ||
| list_node_t b_arc_node; | ||
|
|
||
| /* updated atomically */ | ||
| clock_t b_arc_access; | ||
| uint32_t b_mru_hits; | ||
| uint32_t b_mru_ghost_hits; | ||
| uint32_t b_mfu_hits; | ||
| uint32_t b_mfu_ghost_hits; | ||
| uint32_t b_l2_hits; | ||
|
|
||
| /* self protecting */ | ||
| refcount_t b_refcnt; | ||
|
|
||
| l2arc_buf_hdr_t *b_l2hdr; | ||
| list_node_t b_l2node; | ||
| }; | ||
|
|
||
| typedef struct l2arc_dev { | ||
| vdev_t *l2ad_vdev; /* vdev */ | ||
| spa_t *l2ad_spa; /* spa */ | ||
| uint64_t l2ad_hand; /* next write location */ | ||
| uint64_t l2ad_start; /* first addr on device */ | ||
| uint64_t l2ad_end; /* last addr on device */ | ||
| uint64_t l2ad_evict; /* last addr eviction reached */ | ||
| boolean_t l2ad_first; /* first sweep through */ | ||
| boolean_t l2ad_writing; /* currently writing */ | ||
| list_t *l2ad_buflist; /* buffer list */ | ||
| list_node_t l2ad_node; /* device list node */ | ||
| } l2arc_dev_t; | ||
|
|
||
| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
|
|
||
| #endif /* _SYS_ARC_IMPL_H */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * CDDL HEADER START | ||
| * | ||
| * The contents of this file are subject to the terms of the | ||
| * Common Development and Distribution License, Version 1.0 only | ||
| * (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 2007 Sun Microsystems, Inc. All rights reserved. | ||
| * Use is subject to license terms. | ||
| */ | ||
|
|
||
| #ifndef _SYS_SDT_H | ||
| #define _SYS_SDT_H | ||
|
|
||
| #ifndef _KERNEL | ||
|
|
||
| #define ZFS_PROBE(a) ((void) 0) | ||
| #define ZFS_PROBE1(a, c) ((void) 0) | ||
| #define ZFS_PROBE2(a, c, e) ((void) 0) | ||
| #define ZFS_PROBE3(a, c, e, g) ((void) 0) | ||
| #define ZFS_PROBE4(a, c, e, g, i) ((void) 0) | ||
| #define ZFS_SET_ERROR(err) ((void) 0) | ||
|
|
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| #else | ||
|
|
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| #if defined(HAVE_DECLARE_EVENT_CLASS) | ||
|
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| #include <sys/trace.h> | ||
|
|
||
| /* | ||
| * The set-error SDT probe is extra static, in that we declare its fake | ||
| * function literally, rather than with the DTRACE_PROBE1() macro. This is | ||
| * necessary so that SET_ERROR() can evaluate to a value, which wouldn't | ||
| * be possible if it required multiple statements (to declare the function | ||
| * and then call it). | ||
| * | ||
| * SET_ERROR() uses the comma operator so that it can be used without much | ||
| * additional code. For example, "return (EINVAL);" becomes | ||
| * "return (SET_ERROR(EINVAL));". Note that the argument will be evaluated | ||
| * twice, so it should not have side effects (e.g. something like: | ||
| * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice). | ||
| */ | ||
| #define SET_ERROR(err) \ | ||
| (trace_zfs_set__error(__FILE__, __func__, __LINE__, err), err) | ||
|
|
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| #else | ||
|
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| #undef SET_ERROR | ||
| #define SET_ERROR(err) (err) | ||
|
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| #endif /* HAVE_DECLARE_EVENT_CLASS */ | ||
|
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| #endif /* _KERNEL */ | ||
|
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| #endif /* _SYS_SDT_H */ |
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