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2882 implement libzfs_core
2883 changing "canmount" property to "on" should not always remount dataset
2900 "zfs snapshot" should be able to create multiple, arbitrary snapshots at once
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Chris Siden <christopher.siden@delphix.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Bill Pijewski <wdp@joyent.com>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
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--- old/usr/src/uts/common/fs/zfs/sys/rrwlock.h
+++ new/usr/src/uts/common/fs/zfs/sys/rrwlock.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 23 * Use is subject to license terms.
24 24 */
25 +/*
26 + * Copyright (c) 2012 by Delphix. All rights reserved.
27 + */
25 28
26 29 #ifndef _SYS_RR_RW_LOCK_H
27 30 #define _SYS_RR_RW_LOCK_H
28 31
29 -#pragma ident "%Z%%M% %I% %E% SMI"
30 -
31 32 #ifdef __cplusplus
32 33 extern "C" {
33 34 #endif
34 35
35 36 #include <sys/inttypes.h>
36 37 #include <sys/zfs_context.h>
37 38 #include <sys/refcount.h>
38 39
39 40 /*
40 41 * A reader-writer lock implementation that allows re-entrant reads, but
41 42 * still gives writers priority on "new" reads.
42 43 *
43 44 * See rrwlock.c for more details about the implementation.
44 45 *
45 46 * Fields of the rrwlock_t structure:
46 47 * - rr_lock: protects modification and reading of rrwlock_t fields
47 48 * - rr_cv: cv for waking up readers or waiting writers
48 49 * - rr_writer: thread id of the current writer
49 50 * - rr_anon_rount: number of active anonymous readers
50 51 * - rr_linked_rcount: total number of non-anonymous active readers
51 52 * - rr_writer_wanted: a writer wants the lock
52 53 */
53 54 typedef struct rrwlock {
54 55 kmutex_t rr_lock;
55 56 kcondvar_t rr_cv;
56 57 kthread_t *rr_writer;
57 58 refcount_t rr_anon_rcount;
58 59 refcount_t rr_linked_rcount;
59 60 boolean_t rr_writer_wanted;
60 61 } rrwlock_t;
61 62
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62 63 /*
63 64 * 'tag' is used in reference counting tracking. The
64 65 * 'tag' must be the same in a rrw_enter() as in its
65 66 * corresponding rrw_exit().
66 67 */
67 68 void rrw_init(rrwlock_t *rrl);
68 69 void rrw_destroy(rrwlock_t *rrl);
69 70 void rrw_enter(rrwlock_t *rrl, krw_t rw, void *tag);
70 71 void rrw_exit(rrwlock_t *rrl, void *tag);
71 72 boolean_t rrw_held(rrwlock_t *rrl, krw_t rw);
73 +void rrw_tsd_destroy(void *arg);
72 74
73 75 #define RRW_READ_HELD(x) rrw_held(x, RW_READER)
74 76 #define RRW_WRITE_HELD(x) rrw_held(x, RW_WRITER)
75 77
76 78 #ifdef __cplusplus
77 79 }
78 80 #endif
79 81
80 82 #endif /* _SYS_RR_RW_LOCK_H */
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