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authorSteve French <smfrench@gmail.com>2016-09-23 02:58:16 +0300
committerSteve French <smfrench@gmail.com>2016-10-12 20:08:32 +0300
commit3afca265b5f53a0b15b79531c13858049505582d (patch)
treeac9c7c97ee38fb4c156731643120833c5e53f63c /fs/cifs/cifssmb.c
parentd171356ff11ab1825e456dfb979755e01b3c54a1 (diff)
downloadlinux-3afca265b5f53a0b15b79531c13858049505582d.tar.xz
Clarify locking of cifs file and tcon structures and make more granular
Remove the global file_list_lock to simplify cifs/smb3 locking and have spinlocks that more closely match the information they are protecting. Add new tcon->open_file_lock and file->file_info_lock spinlocks. Locks continue to follow a heirachy, cifs_socket --> cifs_ses --> cifs_tcon --> cifs_file where global tcp_ses_lock still protects socket and cifs_ses, while the the newer locks protect the lower level structure's information (tcon and cifs_file respectively). CC: Stable <stable@vger.kernel.org> Signed-off-by: Steve French <steve.french@primarydata.com> Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Reviewed-by: Germano Percossi <germano.percossi@citrix.com>
Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r--fs/cifs/cifssmb.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index f82d2823622f..3f3185febc58 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -98,13 +98,13 @@ cifs_mark_open_files_invalid(struct cifs_tcon *tcon)
struct list_head *tmp1;
/* list all files open on tree connection and mark them invalid */
- spin_lock(&cifs_file_list_lock);
+ spin_lock(&tcon->open_file_lock);
list_for_each_safe(tmp, tmp1, &tcon->openFileList) {
open_file = list_entry(tmp, struct cifsFileInfo, tlist);
open_file->invalidHandle = true;
open_file->oplock_break_cancelled = true;
}
- spin_unlock(&cifs_file_list_lock);
+ spin_unlock(&tcon->open_file_lock);
/*
* BB Add call to invalidate_inodes(sb) for all superblocks mounted
* to this tcon.