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Diffstat (limited to 'fs/cifs/cifsfs.c')
-rw-r--r--fs/cifs/cifsfs.c80
1 files changed, 72 insertions, 8 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 1ebf7dafc1d7..877095a1192a 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -59,6 +59,8 @@ unsigned int ntlmv2_support = 0;
unsigned int sign_CIFS_PDUs = 1;
extern struct task_struct * oplockThread; /* remove sparse warning */
struct task_struct * oplockThread = NULL;
+extern struct task_struct * dnotifyThread; /* remove sparse warning */
+struct task_struct * dnotifyThread = NULL;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
module_param(CIFSMaxBufSize, int, 0);
MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048");
@@ -73,6 +75,7 @@ module_param(cifs_max_pending, int, 0);
MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256");
static DECLARE_COMPLETION(cifs_oplock_exited);
+static DECLARE_COMPLETION(cifs_dnotify_exited);
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
@@ -202,6 +205,10 @@ cifs_statfs(struct super_block *sb, struct kstatfs *buf)
#endif /* CIFS_EXPERIMENTAL */
rc = CIFSSMBQFSInfo(xid, pTcon, buf);
+ /* Old Windows servers do not support level 103, retry with level
+ one if old server failed the previous call */
+ if(rc)
+ rc = SMBOldQFSInfo(xid, pTcon, buf);
/*
int f_type;
__fsid_t f_fsid;
@@ -253,7 +260,7 @@ cifs_alloc_inode(struct super_block *sb)
cifs_inode->clientCanCacheAll = FALSE;
cifs_inode->vfs_inode.i_blksize = CIFS_MAX_MSGSIZE;
cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
-
+ cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;
INIT_LIST_HEAD(&cifs_inode->openFileList);
return &cifs_inode->vfs_inode;
}
@@ -398,6 +405,34 @@ static struct quotactl_ops cifs_quotactl_ops = {
};
#endif
+static void cifs_umount_begin(struct super_block * sblock)
+{
+ struct cifs_sb_info *cifs_sb;
+ struct cifsTconInfo * tcon;
+
+ cifs_sb = CIFS_SB(sblock);
+ if(cifs_sb == NULL)
+ return;
+
+ tcon = cifs_sb->tcon;
+ if(tcon == NULL)
+ return;
+ down(&tcon->tconSem);
+ if (atomic_read(&tcon->useCount) == 1)
+ tcon->tidStatus = CifsExiting;
+ up(&tcon->tconSem);
+
+ if(tcon->ses && tcon->ses->server)
+ {
+ cERROR(1,("wake up tasks now - umount begin not complete"));
+ wake_up_all(&tcon->ses->server->request_q);
+ }
+/* BB FIXME - finish add checks for tidStatus BB */
+
+ return;
+}
+
+
static int cifs_remount(struct super_block *sb, int *flags, char *data)
{
*flags |= MS_NODIRATIME;
@@ -415,7 +450,7 @@ struct super_operations cifs_super_ops = {
unless later we add lazy close of inodes or unless the kernel forgets to call
us with the same number of releases (closes) as opens */
.show_options = cifs_show_options,
-/* .umount_begin = cifs_umount_begin, *//* consider adding in the future */
+/* .umount_begin = cifs_umount_begin, */ /* BB finish in the future */
.remount_fs = cifs_remount,
};
@@ -783,9 +818,7 @@ static int cifs_oplock_thread(void * dummyarg)
do {
if (try_to_freeze())
continue;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(1*HZ);
spin_lock(&GlobalMid_Lock);
if(list_empty(&GlobalOplock_Q)) {
spin_unlock(&GlobalMid_Lock);
@@ -834,10 +867,27 @@ static int cifs_oplock_thread(void * dummyarg)
}
} else
spin_unlock(&GlobalMid_Lock);
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(1); /* yield in case q were corrupt */
}
} while(!signal_pending(current));
- complete_and_exit (&cifs_oplock_exited, 0);
oplockThread = NULL;
+ complete_and_exit (&cifs_oplock_exited, 0);
+}
+
+static int cifs_dnotify_thread(void * dummyarg)
+{
+ daemonize("cifsdnotifyd");
+ allow_signal(SIGTERM);
+
+ dnotifyThread = current;
+ do {
+ if(try_to_freeze())
+ continue;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(39*HZ);
+ } while(!signal_pending(current));
+ complete_and_exit (&cifs_dnotify_exited, 0);
}
static int __init
@@ -851,6 +901,10 @@ init_cifs(void)
INIT_LIST_HEAD(&GlobalSMBSessionList);
INIT_LIST_HEAD(&GlobalTreeConnectionList);
INIT_LIST_HEAD(&GlobalOplock_Q);
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ INIT_LIST_HEAD(&GlobalDnotifyReqList);
+ INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
+#endif
/*
* Initialize Global counters
*/
@@ -886,10 +940,16 @@ init_cifs(void)
if (!rc) {
rc = (int)kernel_thread(cifs_oplock_thread, NULL,
CLONE_FS | CLONE_FILES | CLONE_VM);
- if(rc > 0)
- return 0;
- else
+ if(rc > 0) {
+ rc = (int)kernel_thread(cifs_dnotify_thread, NULL,
+ CLONE_FS | CLONE_FILES | CLONE_VM);
+ if(rc > 0)
+ return 0;
+ else
+ cERROR(1,("error %d create dnotify thread", rc));
+ } else {
cERROR(1,("error %d create oplock thread",rc));
+ }
}
cifs_destroy_request_bufs();
}
@@ -918,6 +978,10 @@ exit_cifs(void)
send_sig(SIGTERM, oplockThread, 1);
wait_for_completion(&cifs_oplock_exited);
}
+ if(dnotifyThread) {
+ send_sig(SIGTERM, dnotifyThread, 1);
+ wait_for_completion(&cifs_dnotify_exited);
+ }
}
MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");