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Subject[PATCH 09/11] vfs: Make d_invalidate return void

Now that d_invalidate can no longer fail, stop returning a useless
return code. For the few callers that checked the return code update
remove the handling of d_invalidate failure.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
fs/btrfs/ioctl.c | 5 +----
fs/cifs/readdir.c | 6 +-----
fs/dcache.c | 12 +++---------
fs/fuse/dir.c | 4 +---
fs/namei.c | 10 +++++-----
fs/nfs/dir.c | 3 +--
include/linux/dcache.h | 2 +-
7 files changed, 13 insertions(+), 29 deletions(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index b0134892dc70..349848bd54e2 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2229,9 +2229,7 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
}

mutex_lock(&inode->i_mutex);
- err = d_invalidate(dentry);
- if (err)
- goto out_unlock;
+ d_invalidate(dentry);

down_write(&root->fs_info->subvol_sem);

@@ -2316,7 +2314,6 @@ out_release:
btrfs_subvolume_release_metadata(root, &block_rsv, qgroup_reserved);
out_up_write:
up_write(&root->fs_info->subvol_sem);
-out_unlock:
mutex_unlock(&inode->i_mutex);
if (!err) {
shrink_dcache_sb(root->fs_info->sb);
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index b15862e0f68c..d0e9d0169b37 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -87,8 +87,6 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name,
return;

if (dentry) {
- int err;
-
inode = dentry->d_inode;
if (inode) {
/*
@@ -105,10 +103,8 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name,
goto out;
}
}
- err = d_invalidate(dentry);
+ d_invalidate(dentry);
dput(dentry);
- if (err)
- return;
}

/*
diff --git a/fs/dcache.c b/fs/dcache.c
index 5b41205cbf33..5b78bd98649c 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1377,27 +1377,21 @@ static void check_and_drop(void *_data)
* d_invalidate - detach submounts, prune dcache, and drop
* @dentry: dentry to invalidate (aka detach, prune and drop)
*
- * Try to invalidate the dentry if it turns out to be
- * possible. If there are reasons not to delete it
- * return -EBUSY. On success return 0.
- *
* no dcache lock.
*
* The final d_drop is done as an atomic operation relative to
* rename_lock ensuring there are no races with d_set_mounted. This
* ensures there are no unhashed dentries on the path to a mountpoint.
*/
-int d_invalidate(struct dentry *dentry)
+void d_invalidate(struct dentry *dentry)
{
- int ret = 0;
-
/*
* If it's already been dropped, return OK.
*/
spin_lock(&dentry->d_lock);
if (d_unhashed(dentry)) {
spin_unlock(&dentry->d_lock);
- return 0;
+ return;
}
spin_unlock(&dentry->d_lock);

@@ -1432,7 +1426,7 @@ int d_invalidate(struct dentry *dentry)
}

out:
- return ret;
+ return;
}
EXPORT_SYMBOL(d_invalidate);

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 5192d0a04d20..6e920fadb45d 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1225,9 +1225,7 @@ static int fuse_direntplus_link(struct file *file,
d_drop(dentry);
} else if (get_node_id(inode) != o->nodeid ||
((o->attr.mode ^ inode->i_mode) & S_IFMT)) {
- err = d_invalidate(dentry);
- if (err)
- goto out;
+ d_invalidate(dentry);
} else if (is_bad_inode(inode)) {
err = -EIO;
goto out;
diff --git a/fs/namei.c b/fs/namei.c
index 3fca30cd448b..384fcc6a5606 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1259,7 +1259,8 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
if (error < 0) {
dput(dentry);
return ERR_PTR(error);
- } else if (!d_invalidate(dentry)) {
+ } else {
+ d_invalidate(dentry);
dput(dentry);
dentry = NULL;
}
@@ -1391,10 +1392,9 @@ unlazy:
dput(dentry);
return status;
}
- if (!d_invalidate(dentry)) {
- dput(dentry);
- goto need_lookup;
- }
+ d_invalidate(dentry);
+ dput(dentry);
+ goto need_lookup;
}

path->mnt = mnt;
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index a8a2f7f86c45..a2b2b6d17c1f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -464,8 +464,7 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)
nfs_setsecurity(dentry->d_inode, entry->fattr, entry->label);
goto out;
} else {
- if (d_invalidate(dentry) != 0)
- goto out;
+ d_invalidate(dentry);
dput(dentry);
}
}
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index ae77222c3e86..95ddb0bdadb0 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -250,7 +250,7 @@ extern struct dentry * d_obtain_alias(struct inode *);
extern void shrink_dcache_sb(struct super_block *);
extern void shrink_dcache_parent(struct dentry *);
extern void shrink_dcache_for_umount(struct super_block *);
-extern int d_invalidate(struct dentry *);
+extern void d_invalidate(struct dentry *);

/* only used at mount-time */
extern struct dentry * d_make_root(struct inode *);
--
1.7.5.4


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