autofs4: use helper functions for expiring list

Define some simple helper functions for adding and deleting entries on the
expiring dentry list.

Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Sage Weil <sage@newdream.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Andreas Dilger <adilger@sun.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Yehuda Saheh <yehuda@newdream.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index f3cf151..fe9fc23 100644 (file)
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -266,5 +266,31 @@ out:
        return ret;
 }
 
+static inline void autofs4_add_expiring(struct dentry *dentry)
+{
+       struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+       struct autofs_info *ino = autofs4_dentry_ino(dentry);
+       if (ino) {
+               spin_lock(&sbi->lookup_lock);
+               if (list_empty(&ino->expiring))
+                       list_add(&ino->expiring, &sbi->expiring_list);
+               spin_unlock(&sbi->lookup_lock);
+       }
+       return;
+}
+
+static inline void autofs4_del_expiring(struct dentry *dentry)
+{
+       struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+       struct autofs_info *ino = autofs4_dentry_ino(dentry);
+       if (ino) {
+               spin_lock(&sbi->lookup_lock);
+               if (!list_empty(&ino->expiring))
+                       list_del_init(&ino->expiring);
+               spin_unlock(&sbi->lookup_lock);
+       }
+       return;
+}
+
 void autofs4_dentry_release(struct dentry *);
 extern void autofs4_kill_sb(struct super_block *);

diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 67d8d96..2954ac5 100644 (file)
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -563,10 +563,7 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
                         */
                        ino = autofs4_dentry_ino(expiring);
                        autofs4_expire_wait(expiring);
-                       spin_lock(&sbi->lookup_lock);
-                       if (!list_empty(&ino->expiring))
-                               list_del_init(&ino->expiring);
-                       spin_unlock(&sbi->lookup_lock);
+                       autofs4_del_expiring(expiring);
                        dput(expiring);
                }
 
@@ -732,10 +729,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
        dir->i_mtime = CURRENT_TIME;
 
        spin_lock(&dcache_lock);
-       spin_lock(&sbi->lookup_lock);
-       if (list_empty(&ino->expiring))
-               list_add(&ino->expiring, &sbi->expiring_list);
-       spin_unlock(&sbi->lookup_lock);
+       autofs4_add_expiring(dentry);
        spin_lock(&dentry->d_lock);
        __d_drop(dentry);
        spin_unlock(&dentry->d_lock);
@@ -761,10 +755,7 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
                spin_unlock(&dcache_lock);
                return -ENOTEMPTY;
        }
-       spin_lock(&sbi->lookup_lock);
-       if (list_empty(&ino->expiring))
-               list_add(&ino->expiring, &sbi->expiring_list);
-       spin_unlock(&sbi->lookup_lock);
+       autofs4_add_expiring(dentry);
        spin_lock(&dentry->d_lock);
        __d_drop(dentry);
        spin_unlock(&dentry->d_lock);