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cifs: reinstate sharing of tree connections

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Use a similar approach to the SMB session sharing. Add a list of tcons
attached to each SMB session. Move the refcount to non-atomic. Protect
all of the above with the cifs_tcp_ses_lock. Add functions to
properly find and put references to the tcons.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton
2008-11-15 11:12:47 -05:00
committed by Steve French
parent d82c2df54e
commit f1987b44f6
6 changed files with 249 additions and 218 deletions
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8
fs/cifs/cifsfs.c
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@@ -514,10 +514,11 @@ static void cifs_umount_begin(struct super_block *sb)
tcon = cifs_sb->tcon;
if (tcon == NULL)
return;
down(&tcon->tconSem);
if (atomic_read(&tcon->useCount) == 1)
read_lock(&cifs_tcp_ses_lock);
if (tcon->tc_count == 1)
tcon->tidStatus = CifsExiting;
up(&tcon->tconSem);
read_unlock(&cifs_tcp_ses_lock);
/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
/* cancel_notify_requests(tcon); */
@@ -1060,7 +1061,6 @@ init_cifs(void)
int rc = 0;
cifs_proc_init();
INIT_LIST_HEAD(&cifs_tcp_ses_list);
INIT_LIST_HEAD(&GlobalTreeConnectionList); /* BB to be removed by jl */
INIT_LIST_HEAD(&GlobalOplock_Q);
#ifdef CONFIG_CIFS_EXPERIMENTAL
INIT_LIST_HEAD(&GlobalDnotifyReqList);