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authorArnd Bergmann <arnd@arndb.de>2010-10-04 16:55:57 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-10-05 12:08:21 -0400
commit2116b7a473bf1c8d26998b477c294e7fe294921f (patch)
tree5f06aca6b425916f763d83fa4516bca51c8f9a60 /fs/smbfs/smbiod.c
parent5af74aa5e97fcc0cc3955bc2a7ff6f3a13fa41cb (diff)
smbfs: move to drivers/staging
smbfs has been scheduled for removal in 2.6.27, so maybe we can now move it to drivers/staging on the way out. smbfs still uses the big kernel lock and nobody is going to fix that, so we should be getting rid of it soon. This removes the 32 bit compat mount and ioctl handling code, which is implemented in common fs code, and moves all smbfs related files into drivers/staging/smbfs. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/smbfs/smbiod.c')
-rw-r--r--fs/smbfs/smbiod.c344
1 files changed, 0 insertions, 344 deletions
diff --git a/fs/smbfs/smbiod.c b/fs/smbfs/smbiod.c
deleted file mode 100644
index 0e39a924f10a..000000000000
--- a/fs/smbfs/smbiod.c
+++ /dev/null
@@ -1,344 +0,0 @@
1/*
2 * smbiod.c
3 *
4 * Copyright (C) 2000, Charles Loep / Corel Corp.
5 * Copyright (C) 2001, Urban Widmark
6 */
7
8
9#include <linux/sched.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/string.h>
13#include <linux/stat.h>
14#include <linux/errno.h>
15#include <linux/init.h>
16#include <linux/file.h>
17#include <linux/dcache.h>
18#include <linux/module.h>
19#include <linux/net.h>
20#include <linux/kthread.h>
21#include <net/ip.h>
22
23#include <linux/smb_fs.h>
24#include <linux/smbno.h>
25#include <linux/smb_mount.h>
26
27#include <asm/system.h>
28#include <asm/uaccess.h>
29
30#include "smb_debug.h"
31#include "request.h"
32#include "proto.h"
33
34enum smbiod_state {
35 SMBIOD_DEAD,
36 SMBIOD_STARTING,
37 SMBIOD_RUNNING,
38};
39
40static enum smbiod_state smbiod_state = SMBIOD_DEAD;
41static struct task_struct *smbiod_thread;
42static DECLARE_WAIT_QUEUE_HEAD(smbiod_wait);
43static LIST_HEAD(smb_servers);
44static DEFINE_SPINLOCK(servers_lock);
45
46#define SMBIOD_DATA_READY (1<<0)
47static unsigned long smbiod_flags;
48
49static int smbiod(void *);
50static int smbiod_start(void);
51
52/*
53 * called when there's work for us to do
54 */
55void smbiod_wake_up(void)
56{
57 if (smbiod_state == SMBIOD_DEAD)
58 return;
59 set_bit(SMBIOD_DATA_READY, &smbiod_flags);
60 wake_up_interruptible(&smbiod_wait);
61}
62
63/*
64 * start smbiod if none is running
65 */
66static int smbiod_start(void)
67{
68 struct task_struct *tsk;
69 int err = 0;
70
71 if (smbiod_state != SMBIOD_DEAD)
72 return 0;
73 smbiod_state = SMBIOD_STARTING;
74 __module_get(THIS_MODULE);
75 spin_unlock(&servers_lock);
76 tsk = kthread_run(smbiod, NULL, "smbiod");
77 if (IS_ERR(tsk)) {
78 err = PTR_ERR(tsk);
79 module_put(THIS_MODULE);
80 }
81
82 spin_lock(&servers_lock);
83 if (err < 0) {
84 smbiod_state = SMBIOD_DEAD;
85 smbiod_thread = NULL;
86 } else {
87 smbiod_state = SMBIOD_RUNNING;
88 smbiod_thread = tsk;
89 }
90 return err;
91}
92
93/*
94 * register a server & start smbiod if necessary
95 */
96int smbiod_register_server(struct smb_sb_info *server)
97{
98 int ret;
99 spin_lock(&servers_lock);
100 list_add(&server->entry, &smb_servers);
101 VERBOSE("%p\n", server);
102 ret = smbiod_start();
103 spin_unlock(&servers_lock);
104 return ret;
105}
106
107/*
108 * Unregister a server
109 * Must be called with the server lock held.
110 */
111void smbiod_unregister_server(struct smb_sb_info *server)
112{
113 spin_lock(&servers_lock);
114 list_del_init(&server->entry);
115 VERBOSE("%p\n", server);
116 spin_unlock(&servers_lock);
117
118 smbiod_wake_up();
119 smbiod_flush(server);
120}
121
122void smbiod_flush(struct smb_sb_info *server)
123{
124 struct list_head *tmp, *n;
125 struct smb_request *req;
126
127 list_for_each_safe(tmp, n, &server->xmitq) {
128 req = list_entry(tmp, struct smb_request, rq_queue);
129 req->rq_errno = -EIO;
130 list_del_init(&req->rq_queue);
131 smb_rput(req);
132 wake_up_interruptible(&req->rq_wait);
133 }
134 list_for_each_safe(tmp, n, &server->recvq) {
135 req = list_entry(tmp, struct smb_request, rq_queue);
136 req->rq_errno = -EIO;
137 list_del_init(&req->rq_queue);
138 smb_rput(req);
139 wake_up_interruptible(&req->rq_wait);
140 }
141}
142
143/*
144 * Wake up smbmount and make it reconnect to the server.
145 * This must be called with the server locked.
146 *
147 * FIXME: add smbconnect version to this
148 */
149int smbiod_retry(struct smb_sb_info *server)
150{
151 struct list_head *head;
152 struct smb_request *req;
153 struct pid *pid = get_pid(server->conn_pid);
154 int result = 0;
155
156 VERBOSE("state: %d\n", server->state);
157 if (server->state == CONN_VALID || server->state == CONN_RETRYING)
158 goto out;
159
160 smb_invalidate_inodes(server);
161
162 /*
163 * Some requests are meaningless after a retry, so we abort them.
164 * One example are all requests using 'fileid' since the files are
165 * closed on retry.
166 */
167 head = server->xmitq.next;
168 while (head != &server->xmitq) {
169 req = list_entry(head, struct smb_request, rq_queue);
170 head = head->next;
171
172 req->rq_bytes_sent = 0;
173 if (req->rq_flags & SMB_REQ_NORETRY) {
174 VERBOSE("aborting request %p on xmitq\n", req);
175 req->rq_errno = -EIO;
176 list_del_init(&req->rq_queue);
177 smb_rput(req);
178 wake_up_interruptible(&req->rq_wait);
179 }
180 }
181
182 /*
183 * FIXME: test the code for retrying request we already sent
184 */
185 head = server->recvq.next;
186 while (head != &server->recvq) {
187 req = list_entry(head, struct smb_request, rq_queue);
188 head = head->next;
189#if 0
190 if (req->rq_flags & SMB_REQ_RETRY) {
191 /* must move the request to the xmitq */
192 VERBOSE("retrying request %p on recvq\n", req);
193 list_move(&req->rq_queue, &server->xmitq);
194 continue;
195 }
196#endif
197
198 VERBOSE("aborting request %p on recvq\n", req);
199 /* req->rq_rcls = ???; */ /* FIXME: set smb error code too? */
200 req->rq_errno = -EIO;
201 list_del_init(&req->rq_queue);
202 smb_rput(req);
203 wake_up_interruptible(&req->rq_wait);
204 }
205
206 smb_close_socket(server);
207
208 if (!pid) {
209 /* FIXME: this is fatal, umount? */
210 printk(KERN_ERR "smb_retry: no connection process\n");
211 server->state = CONN_RETRIED;
212 goto out;
213 }
214
215 /*
216 * Change state so that only one retry per server will be started.
217 */
218 server->state = CONN_RETRYING;
219
220 /*
221 * Note: use the "priv" flag, as a user process may need to reconnect.
222 */
223 result = kill_pid(pid, SIGUSR1, 1);
224 if (result) {
225 /* FIXME: this is most likely fatal, umount? */
226 printk(KERN_ERR "smb_retry: signal failed [%d]\n", result);
227 goto out;
228 }
229 VERBOSE("signalled pid %d\n", pid_nr(pid));
230
231 /* FIXME: The retried requests should perhaps get a "time boost". */
232
233out:
234 put_pid(pid);
235 return result;
236}
237
238/*
239 * Currently handles lockingX packets.
240 */
241static void smbiod_handle_request(struct smb_sb_info *server)
242{
243 PARANOIA("smbiod got a request ... and we don't implement oplocks!\n");
244 server->rstate = SMB_RECV_DROP;
245}
246
247/*
248 * Do some IO for one server.
249 */
250static void smbiod_doio(struct smb_sb_info *server)
251{
252 int result;
253 int maxwork = 7;
254
255 if (server->state != CONN_VALID)
256 goto out;
257
258 do {
259 result = smb_request_recv(server);
260 if (result < 0) {
261 server->state = CONN_INVALID;
262 smbiod_retry(server);
263 goto out; /* reconnecting is slow */
264 } else if (server->rstate == SMB_RECV_REQUEST)
265 smbiod_handle_request(server);
266 } while (result > 0 && maxwork-- > 0);
267
268 /*
269 * If there is more to read then we want to be sure to wake up again.
270 */
271 if (server->state != CONN_VALID)
272 goto out;
273 if (smb_recv_available(server) > 0)
274 set_bit(SMBIOD_DATA_READY, &smbiod_flags);
275
276 do {
277 result = smb_request_send_server(server);
278 if (result < 0) {
279 server->state = CONN_INVALID;
280 smbiod_retry(server);
281 goto out; /* reconnecting is slow */
282 }
283 } while (result > 0);
284
285 /*
286 * If the last request was not sent out we want to wake up again.
287 */
288 if (!list_empty(&server->xmitq))
289 set_bit(SMBIOD_DATA_READY, &smbiod_flags);
290
291out:
292 return;
293}
294
295/*
296 * smbiod kernel thread
297 */
298static int smbiod(void *unused)
299{
300 VERBOSE("SMB Kernel thread starting (%d) ...\n", current->pid);
301
302 for (;;) {
303 struct smb_sb_info *server;
304 struct list_head *pos, *n;
305
306 /* FIXME: Use poll? */
307 wait_event_interruptible(smbiod_wait,
308 test_bit(SMBIOD_DATA_READY, &smbiod_flags));
309 if (signal_pending(current)) {
310 spin_lock(&servers_lock);
311 smbiod_state = SMBIOD_DEAD;
312 spin_unlock(&servers_lock);
313 break;
314 }
315
316 clear_bit(SMBIOD_DATA_READY, &smbiod_flags);
317
318 spin_lock(&servers_lock);
319 if (list_empty(&smb_servers)) {
320 smbiod_state = SMBIOD_DEAD;
321 spin_unlock(&servers_lock);
322 break;
323 }
324
325 list_for_each_safe(pos, n, &smb_servers) {
326 server = list_entry(pos, struct smb_sb_info, entry);
327 VERBOSE("checking server %p\n", server);
328
329 if (server->state == CONN_VALID) {
330 spin_unlock(&servers_lock);
331
332 smb_lock_server(server);
333 smbiod_doio(server);
334 smb_unlock_server(server);
335
336 spin_lock(&servers_lock);
337 }
338 }
339 spin_unlock(&servers_lock);
340 }
341
342 VERBOSE("SMB Kernel thread exiting (%d) ...\n", current->pid);
343 module_put_and_exit(0);
344}
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