1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2018 Nexenta Systems, Inc. All rights reserved.
*/
/*
* mdb module for libmlsvc, which contains interesting data structures
* including: the share cache
*/
#include <mdb/mdb_modapi.h>
#include <mdb/mdb_ks.h>
#include <mdb/mdb_ctf.h>
#include <synch.h>
#include <smbsrv/hash_table.h>
#include <smbsrv/libsmb.h>
#include <smbsrv/smb_share.h>
#define MLSVC_OBJNAME "libmlsvc.so.1"
#define MLSVC_SCOPE MLSVC_OBJNAME "`"
#define AFLAG 1
#define VFLAG 2
typedef struct dump_shr_args {
uint_t dsa_opts;
uintptr_t dsa_hdl;
smb_share_t dsa_shr;
} dump_shr_args_t;
/*ARGSUSED*/
static int
dump_shr_cb(uintptr_t addr, const void *data, void *varg)
{
dump_shr_args_t *args = varg;
const HT_ITEM *hi = data;
smb_share_t *shr = &args->dsa_shr;
if (hi->hi_data == NULL)
return (WALK_NEXT);
if ((hi->hi_flags & HT_DELETE) != 0 &&
(args->dsa_opts & AFLAG) == 0)
return (WALK_NEXT);
if (args->dsa_opts & VFLAG) {
mdb_arg_t argv;
int flags = DCMD_ADDRSPEC;
argv.a_type = MDB_TYPE_STRING;
argv.a_un.a_str = MLSVC_SCOPE "smb_share_t";
/* Don't fail the walk if this fails. */
mdb_printf("%-?p ", hi->hi_data);
mdb_call_dcmd("print", (uintptr_t)hi->hi_data,
flags, 1, &argv);
} else {
if (mdb_vread(shr, sizeof (*shr),
(uintptr_t)hi->hi_data) == -1) {
mdb_warn("failed to read %s at %p",
"smb_share_t", hi->hi_data);
return (WALK_NEXT);
}
mdb_printf("%-?p ", hi->hi_data);
mdb_printf("name=%s path=%s desc=\"%s\"\n",
shr->shr_name, shr->shr_path, shr->shr_cmnt);
}
return (WALK_NEXT);
}
/*
* *************************** Top level dcmds ****************************
*/
typedef struct mdb_smb_shr_cache {
HT_HANDLE *sc_cache;
rwlock_t sc_cache_lck;
mutex_t sc_mtx;
cond_t sc_cv;
uint32_t sc_state;
uint32_t sc_nops;
} mdb_smb_shr_cache_t;
static void
smb_shr_cache_help(void)
{
mdb_printf(
"Displays the list of shares in the smbd smb_shr_cache.\n"
"With -a, also show deleted entries.\n"
"With -v, print full smb_share_t objects.\n\n");
}
/*
* ::smb_shr_cache
*/
/*ARGSUSED*/
static int
smb_shr_cache_dcmd(uintptr_t addr, uint_t flags, int argc,
const mdb_arg_t *argv)
{
dump_shr_args_t *args;
mdb_smb_shr_cache_t *ssc;
args = mdb_zalloc(sizeof (*args), UM_SLEEP | UM_GC);
if (mdb_getopts(argc, argv,
'a', MDB_OPT_SETBITS, AFLAG, &args->dsa_opts,
'v', MDB_OPT_SETBITS, VFLAG, &args->dsa_opts,
NULL) != argc)
return (DCMD_USAGE);
if (!(flags & DCMD_ADDRSPEC)) {
GElf_Sym sym;
/* Locate the shr hash head. */
if (mdb_lookup_by_obj(MLSVC_OBJNAME, "smb_shr_cache", &sym)) {
mdb_warn("failed to lookup `smb_shr_cache'\n");
return (DCMD_ERR);
}
addr = sym.st_value;
}
ssc = mdb_zalloc(sizeof (*ssc), UM_SLEEP | UM_GC);
if (mdb_ctf_vread(ssc, MLSVC_SCOPE "smb_shr_cache_t",
"mdb_smb_shr_cache_t", addr, 0) < 0) {
mdb_warn("failed to read smb_shr_cache at %p", addr);
return (DCMD_ERR);
}
/* Now walk HT_HANDLE *sc_cache */
args->dsa_hdl = (uintptr_t)ssc->sc_cache;
if (mdb_pwalk(MLSVC_SCOPE "smb_ht_walker",
dump_shr_cb, args, args->dsa_hdl) == -1) {
mdb_warn("cannot walk smb_shr_cache list");
return (DCMD_ERR);
}
return (DCMD_OK);
}
/*
* MDB module linkage information:
*
* We declare a list of structures describing our dcmds, a list of structures
* describing our walkers and a function named _mdb_init to return a pointer
* to our module information.
*/
static const mdb_dcmd_t dcmds[] = {
/* Avoiding name conflict with smbsrv`smb_shr_cache */
{ "smbd_shr_cache",
"[-av]",
"print SMB share cache",
smb_shr_cache_dcmd,
smb_shr_cache_help },
{ NULL }
};
int smb_ht_walk_init(mdb_walk_state_t *wsp);
int smb_ht_walk_step(mdb_walk_state_t *wsp);
static const mdb_walker_t walkers[] = {
{ "smb_ht_walker",
"walk an smb_hash_t structure",
smb_ht_walk_init,
smb_ht_walk_step,
NULL,
NULL },
{ NULL }
};
static const mdb_modinfo_t modinfo = {
MDB_API_VERSION, dcmds, walkers
};
const mdb_modinfo_t *
_mdb_init(void)
{
return (&modinfo);
}
|
