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
|
/*
* 9p backend
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "fsdev/qemu-fsdev.h"
#include "qemu/thread.h"
#include "qemu/coroutine.h"
#include "coth.h"
int coroutine_fn v9fs_co_readdir(V9fsPDU *pdu, V9fsFidState *fidp,
struct dirent **dent)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
struct dirent *entry;
errno = 0;
entry = s->ops->readdir(&s->ctx, &fidp->fs);
if (!entry && errno) {
err = -errno;
} else {
*dent = entry;
err = 0;
}
});
return err;
}
off_t v9fs_co_telldir(V9fsPDU *pdu, V9fsFidState *fidp)
{
off_t err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->telldir(&s->ctx, &fidp->fs);
if (err < 0) {
err = -errno;
}
});
return err;
}
void coroutine_fn v9fs_co_seekdir(V9fsPDU *pdu, V9fsFidState *fidp,
off_t offset)
{
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return;
}
v9fs_co_run_in_worker(
{
s->ops->seekdir(&s->ctx, &fidp->fs, offset);
});
}
void coroutine_fn v9fs_co_rewinddir(V9fsPDU *pdu, V9fsFidState *fidp)
{
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return;
}
v9fs_co_run_in_worker(
{
s->ops->rewinddir(&s->ctx, &fidp->fs);
});
}
int coroutine_fn v9fs_co_mkdir(V9fsPDU *pdu, V9fsFidState *fidp,
V9fsString *name, mode_t mode, uid_t uid,
gid_t gid, struct stat *stbuf)
{
int err;
FsCred cred;
V9fsPath path;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
cred_init(&cred);
cred.fc_mode = mode;
cred.fc_uid = uid;
cred.fc_gid = gid;
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->mkdir(&s->ctx, &fidp->path, name->data, &cred);
if (err < 0) {
err = -errno;
} else {
v9fs_path_init(&path);
err = v9fs_name_to_path(s, &fidp->path, name->data, &path);
if (!err) {
err = s->ops->lstat(&s->ctx, &path, stbuf);
if (err < 0) {
err = -errno;
}
}
v9fs_path_free(&path);
}
});
v9fs_path_unlock(s);
return err;
}
int coroutine_fn v9fs_co_opendir(V9fsPDU *pdu, V9fsFidState *fidp)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->opendir(&s->ctx, &fidp->path, &fidp->fs);
if (err < 0) {
err = -errno;
} else {
err = 0;
}
});
v9fs_path_unlock(s);
if (!err) {
total_open_fd++;
if (total_open_fd > open_fd_hw) {
v9fs_reclaim_fd(pdu);
}
}
return err;
}
int coroutine_fn v9fs_co_closedir(V9fsPDU *pdu, V9fsFidOpenState *fs)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->closedir(&s->ctx, fs);
if (err < 0) {
err = -errno;
}
});
if (!err) {
total_open_fd--;
}
return err;
}
|
