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path: root/drivers/staging/smbfs/smbiod.c
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Diffstat (limited to 'drivers/staging/smbfs/smbiod.c')
-rw-r--r--drivers/staging/smbfs/smbiod.c343
1 files changed, 0 insertions, 343 deletions
diff --git a/drivers/staging/smbfs/smbiod.c b/drivers/staging/smbfs/smbiod.c
deleted file mode 100644
index ec998920f8d..00000000000
--- a/drivers/staging/smbfs/smbiod.c
+++ /dev/null
@@ -1,343 +0,0 @@
-/*
- * smbiod.c
- *
- * Copyright (C) 2000, Charles Loep / Corel Corp.
- * Copyright (C) 2001, Urban Widmark
- */
-
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/stat.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/file.h>
-#include <linux/dcache.h>
-#include <linux/module.h>
-#include <linux/net.h>
-#include <linux/kthread.h>
-#include <net/ip.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-
-#include "smb_fs.h"
-#include "smbno.h"
-#include "smb_mount.h"
-#include "smb_debug.h"
-#include "request.h"
-#include "proto.h"
-
-enum smbiod_state {
- SMBIOD_DEAD,
- SMBIOD_STARTING,
- SMBIOD_RUNNING,
-};
-
-static enum smbiod_state smbiod_state = SMBIOD_DEAD;
-static struct task_struct *smbiod_thread;
-static DECLARE_WAIT_QUEUE_HEAD(smbiod_wait);
-static LIST_HEAD(smb_servers);
-static DEFINE_SPINLOCK(servers_lock);
-
-#define SMBIOD_DATA_READY (1<<0)
-static unsigned long smbiod_flags;
-
-static int smbiod(void *);
-static int smbiod_start(void);
-
-/*
- * called when there's work for us to do
- */
-void smbiod_wake_up(void)
-{
- if (smbiod_state == SMBIOD_DEAD)
- return;
- set_bit(SMBIOD_DATA_READY, &smbiod_flags);
- wake_up_interruptible(&smbiod_wait);
-}
-
-/*
- * start smbiod if none is running
- */
-static int smbiod_start(void)
-{
- struct task_struct *tsk;
- int err = 0;
-
- if (smbiod_state != SMBIOD_DEAD)
- return 0;
- smbiod_state = SMBIOD_STARTING;
- __module_get(THIS_MODULE);
- spin_unlock(&servers_lock);
- tsk = kthread_run(smbiod, NULL, "smbiod");
- if (IS_ERR(tsk)) {
- err = PTR_ERR(tsk);
- module_put(THIS_MODULE);
- }
-
- spin_lock(&servers_lock);
- if (err < 0) {
- smbiod_state = SMBIOD_DEAD;
- smbiod_thread = NULL;
- } else {
- smbiod_state = SMBIOD_RUNNING;
- smbiod_thread = tsk;
- }
- return err;
-}
-
-/*
- * register a server & start smbiod if necessary
- */
-int smbiod_register_server(struct smb_sb_info *server)
-{
- int ret;
- spin_lock(&servers_lock);
- list_add(&server->entry, &smb_servers);
- VERBOSE("%p\n", server);
- ret = smbiod_start();
- spin_unlock(&servers_lock);
- return ret;
-}
-
-/*
- * Unregister a server
- * Must be called with the server lock held.
- */
-void smbiod_unregister_server(struct smb_sb_info *server)
-{
- spin_lock(&servers_lock);
- list_del_init(&server->entry);
- VERBOSE("%p\n", server);
- spin_unlock(&servers_lock);
-
- smbiod_wake_up();
- smbiod_flush(server);
-}
-
-void smbiod_flush(struct smb_sb_info *server)
-{
- struct list_head *tmp, *n;
- struct smb_request *req;
-
- list_for_each_safe(tmp, n, &server->xmitq) {
- req = list_entry(tmp, struct smb_request, rq_queue);
- req->rq_errno = -EIO;
- list_del_init(&req->rq_queue);
- smb_rput(req);
- wake_up_interruptible(&req->rq_wait);
- }
- list_for_each_safe(tmp, n, &server->recvq) {
- req = list_entry(tmp, struct smb_request, rq_queue);
- req->rq_errno = -EIO;
- list_del_init(&req->rq_queue);
- smb_rput(req);
- wake_up_interruptible(&req->rq_wait);
- }
-}
-
-/*
- * Wake up smbmount and make it reconnect to the server.
- * This must be called with the server locked.
- *
- * FIXME: add smbconnect version to this
- */
-int smbiod_retry(struct smb_sb_info *server)
-{
- struct list_head *head;
- struct smb_request *req;
- struct pid *pid = get_pid(server->conn_pid);
- int result = 0;
-
- VERBOSE("state: %d\n", server->state);
- if (server->state == CONN_VALID || server->state == CONN_RETRYING)
- goto out;
-
- smb_invalidate_inodes(server);
-
- /*
- * Some requests are meaningless after a retry, so we abort them.
- * One example are all requests using 'fileid' since the files are
- * closed on retry.
- */
- head = server->xmitq.next;
- while (head != &server->xmitq) {
- req = list_entry(head, struct smb_request, rq_queue);
- head = head->next;
-
- req->rq_bytes_sent = 0;
- if (req->rq_flags & SMB_REQ_NORETRY) {
- VERBOSE("aborting request %p on xmitq\n", req);
- req->rq_errno = -EIO;
- list_del_init(&req->rq_queue);
- smb_rput(req);
- wake_up_interruptible(&req->rq_wait);
- }
- }
-
- /*
- * FIXME: test the code for retrying request we already sent
- */
- head = server->recvq.next;
- while (head != &server->recvq) {
- req = list_entry(head, struct smb_request, rq_queue);
- head = head->next;
-#if 0
- if (req->rq_flags & SMB_REQ_RETRY) {
- /* must move the request to the xmitq */
- VERBOSE("retrying request %p on recvq\n", req);
- list_move(&req->rq_queue, &server->xmitq);
- continue;
- }
-#endif
-
- VERBOSE("aborting request %p on recvq\n", req);
- /* req->rq_rcls = ???; */ /* FIXME: set smb error code too? */
- req->rq_errno = -EIO;
- list_del_init(&req->rq_queue);
- smb_rput(req);
- wake_up_interruptible(&req->rq_wait);
- }
-
- smb_close_socket(server);
-
- if (!pid) {
- /* FIXME: this is fatal, umount? */
- printk(KERN_ERR "smb_retry: no connection process\n");
- server->state = CONN_RETRIED;
- goto out;
- }
-
- /*
- * Change state so that only one retry per server will be started.
- */
- server->state = CONN_RETRYING;
-
- /*
- * Note: use the "priv" flag, as a user process may need to reconnect.
- */
- result = kill_pid(pid, SIGUSR1, 1);
- if (result) {
- /* FIXME: this is most likely fatal, umount? */
- printk(KERN_ERR "smb_retry: signal failed [%d]\n", result);
- goto out;
- }
- VERBOSE("signalled pid %d\n", pid_nr(pid));
-
- /* FIXME: The retried requests should perhaps get a "time boost". */
-
-out:
- put_pid(pid);
- return result;
-}
-
-/*
- * Currently handles lockingX packets.
- */
-static void smbiod_handle_request(struct smb_sb_info *server)
-{
- PARANOIA("smbiod got a request ... and we don't implement oplocks!\n");
- server->rstate = SMB_RECV_DROP;
-}
-
-/*
- * Do some IO for one server.
- */
-static void smbiod_doio(struct smb_sb_info *server)
-{
- int result;
- int maxwork = 7;
-
- if (server->state != CONN_VALID)
- goto out;
-
- do {
- result = smb_request_recv(server);
- if (result < 0) {
- server->state = CONN_INVALID;
- smbiod_retry(server);
- goto out; /* reconnecting is slow */
- } else if (server->rstate == SMB_RECV_REQUEST)
- smbiod_handle_request(server);
- } while (result > 0 && maxwork-- > 0);
-
- /*
- * If there is more to read then we want to be sure to wake up again.
- */
- if (server->state != CONN_VALID)
- goto out;
- if (smb_recv_available(server) > 0)
- set_bit(SMBIOD_DATA_READY, &smbiod_flags);
-
- do {
- result = smb_request_send_server(server);
- if (result < 0) {
- server->state = CONN_INVALID;
- smbiod_retry(server);
- goto out; /* reconnecting is slow */
- }
- } while (result > 0);
-
- /*
- * If the last request was not sent out we want to wake up again.
- */
- if (!list_empty(&server->xmitq))
- set_bit(SMBIOD_DATA_READY, &smbiod_flags);
-
-out:
- return;
-}
-
-/*
- * smbiod kernel thread
- */
-static int smbiod(void *unused)
-{
- VERBOSE("SMB Kernel thread starting (%d) ...\n", current->pid);
-
- for (;;) {
- struct smb_sb_info *server;
- struct list_head *pos, *n;
-
- /* FIXME: Use poll? */
- wait_event_interruptible(smbiod_wait,
- test_bit(SMBIOD_DATA_READY, &smbiod_flags));
- if (signal_pending(current)) {
- spin_lock(&servers_lock);
- smbiod_state = SMBIOD_DEAD;
- spin_unlock(&servers_lock);
- break;
- }
-
- clear_bit(SMBIOD_DATA_READY, &smbiod_flags);
-
- spin_lock(&servers_lock);
- if (list_empty(&smb_servers)) {
- smbiod_state = SMBIOD_DEAD;
- spin_unlock(&servers_lock);
- break;
- }
-
- list_for_each_safe(pos, n, &smb_servers) {
- server = list_entry(pos, struct smb_sb_info, entry);
- VERBOSE("checking server %p\n", server);
-
- if (server->state == CONN_VALID) {
- spin_unlock(&servers_lock);
-
- smb_lock_server(server);
- smbiod_doio(server);
- smb_unlock_server(server);
-
- spin_lock(&servers_lock);
- }
- }
- spin_unlock(&servers_lock);
- }
-
- VERBOSE("SMB Kernel thread exiting (%d) ...\n", current->pid);
- module_put_and_exit(0);
-}
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