ocfs2: add IO error check in ocfs2_get_sector()

[safe/jmp/linux-2.6] / fs / autofs4 / expire.c

diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 705b9f0..e3bd507 100644 (file)
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -56,12 +56,23 @@ static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
        mntget(mnt);
        dget(dentry);
 
-       if (!autofs4_follow_mount(&mnt, &dentry))
+       if (!follow_down(&mnt, &dentry))
                goto done;
 
-       /* This is an autofs submount, we can't expire it */
-       if (is_autofs4_dentry(dentry))
-               goto done;
+       if (is_autofs4_dentry(dentry)) {
+               struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+
+               /* This is an autofs submount, we can't expire it */
+               if (autofs_type_indirect(sbi->type))
+                       goto done;
+
+               /*
+                * Otherwise it's an offset mount and we need to check
+                * if we can umount its mount, if there is one.
+                */
+               if (!d_mountpoint(dentry))
+                       goto done;
+       }
 
        /* Update the expiry counter if fs is busy */
        if (!may_umount_tree(mnt)) {
@@ -244,10 +255,10 @@ cont:
 }
 
 /* Check if we can expire a direct mount (possibly a tree) */
-static struct dentry *autofs4_expire_direct(struct super_block *sb,
-                                           struct vfsmount *mnt,
-                                           struct autofs_sb_info *sbi,
-                                           int how)
+struct dentry *autofs4_expire_direct(struct super_block *sb,
+                                    struct vfsmount *mnt,
+                                    struct autofs_sb_info *sbi,
+                                    int how)
 {
        unsigned long timeout;
        struct dentry *root = dget(sb->s_root);
@@ -283,10 +294,10 @@ static struct dentry *autofs4_expire_direct(struct super_block *sb,
  *  - it is unused by any user process
  *  - it has been unused for exp_timeout time
  */
-static struct dentry *autofs4_expire_indirect(struct super_block *sb,
-                                             struct vfsmount *mnt,
-                                             struct autofs_sb_info *sbi,
-                                             int how)
+struct dentry *autofs4_expire_indirect(struct super_block *sb,
+                                      struct vfsmount *mnt,
+                                      struct autofs_sb_info *sbi,
+                                      int how)
 {
        unsigned long timeout;
        struct dentry *root = sb->s_root;
@@ -402,6 +413,35 @@ found:
        return expired;
 }
 
+int autofs4_expire_wait(struct dentry *dentry)
+{
+       struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+       struct autofs_info *ino = autofs4_dentry_ino(dentry);
+       int status;
+
+       /* Block on any pending expire */
+       spin_lock(&sbi->fs_lock);
+       if (ino->flags & AUTOFS_INF_EXPIRING) {
+               spin_unlock(&sbi->fs_lock);
+
+               DPRINTK("waiting for expire %p name=%.*s",
+                        dentry, dentry->d_name.len, dentry->d_name.name);
+
+               status = autofs4_wait(sbi, dentry, NFY_NONE);
+               wait_for_completion(&ino->expire_complete);
+
+               DPRINTK("expire done status=%d", status);
+
+               if (d_unhashed(dentry))
+                       return -EAGAIN;
+
+               return status;
+       }
+       spin_unlock(&sbi->fs_lock);
+
+       return 0;
+}
+
 /* Perform an expiry operation */
 int autofs4_expire_run(struct super_block *sb,
                      struct vfsmount *mnt,
@@ -450,7 +490,7 @@ int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt,
        if (arg && get_user(do_now, arg))
                return -EFAULT;
 
-       if (sbi->type & AUTOFS_TYPE_DIRECT)
+       if (autofs_type_trigger(sbi->type))
                dentry = autofs4_expire_direct(sb, mnt, sbi, do_now);
        else
                dentry = autofs4_expire_indirect(sb, mnt, sbi, do_now);