vfs: switch i_dentry/d_alias to hlist

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index 843cdc9..eb82ee5 100644 (file)
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -125,8 +125,9 @@ static void
 affs_fix_dcache(struct inode *inode, u32 entry_ino)
 {
        struct dentry *dentry;
+       struct hlist_node *p;
        spin_lock(&inode->i_lock);
-       list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                if (entry_ino == (u32)(long)dentry->d_fsdata) {
                        dentry->d_fsdata = (void *)inode->i_ino;
                        break;

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a7d1921..a101572 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6987,7 +6987,7 @@ void btrfs_destroy_inode(struct inode *inode)
        struct btrfs_ordered_extent *ordered;
        struct btrfs_root *root = BTRFS_I(inode)->root;
 
-       WARN_ON(!list_empty(&inode->i_dentry));
+       WARN_ON(!hlist_empty(&inode->i_dentry));
        WARN_ON(inode->i_data.nrpages);
        WARN_ON(BTRFS_I(inode)->outstanding_extents);
        WARN_ON(BTRFS_I(inode)->reserved_extents);

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 745da3d..8e8bb49 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -800,7 +800,7 @@ cifs_find_inode(struct inode *inode, void *opaque)
                return 0;
 
        /* if it's not a directory or has no dentries, then flag it */
-       if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry))
+       if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
                fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
 
        return 1;
@@ -825,9 +825,10 @@ static bool
 inode_has_hashed_dentries(struct inode *inode)
 {
        struct dentry *dentry;
+       struct hlist_node *p;
 
        spin_lock(&inode->i_lock);
-       list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
                        spin_unlock(&inode->i_lock);
                        return true;

diff --git a/fs/dcache.c b/fs/dcache.c
index 44acb5b..015586f 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -218,7 +218,7 @@ static void __d_free(struct rcu_head *head)
 {
        struct dentry *dentry = container_of(head, struct dentry, d_u.d_rcu);
 
-       WARN_ON(!list_empty(&dentry->d_alias));
+       WARN_ON(!hlist_unhashed(&dentry->d_alias));
        if (dname_external(dentry))
                kfree(dentry->d_name.name);
        kmem_cache_free(dentry_cache, dentry); 
@@ -267,7 +267,7 @@ static void dentry_iput(struct dentry * dentry)
        struct inode *inode = dentry->d_inode;
        if (inode) {
                dentry->d_inode = NULL;
-               list_del_init(&dentry->d_alias);
+               hlist_del_init(&dentry->d_alias);
                spin_unlock(&dentry->d_lock);
                spin_unlock(&inode->i_lock);
                if (!inode->i_nlink)
@@ -291,7 +291,7 @@ static void dentry_unlink_inode(struct dentry * dentry)
 {
        struct inode *inode = dentry->d_inode;
        dentry->d_inode = NULL;
-       list_del_init(&dentry->d_alias);
+       hlist_del_init(&dentry->d_alias);
        dentry_rcuwalk_barrier(dentry);
        spin_unlock(&dentry->d_lock);
        spin_unlock(&inode->i_lock);
@@ -699,10 +699,11 @@ EXPORT_SYMBOL(dget_parent);
 static struct dentry *__d_find_alias(struct inode *inode, int want_discon)
 {
        struct dentry *alias, *discon_alias;
+       struct hlist_node *p;
 
 again:
        discon_alias = NULL;
-       list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
                spin_lock(&alias->d_lock);
                if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
                        if (IS_ROOT(alias) &&
@@ -737,7 +738,7 @@ struct dentry *d_find_alias(struct inode *inode)
 {
        struct dentry *de = NULL;
 
-       if (!list_empty(&inode->i_dentry)) {
+       if (!hlist_empty(&inode->i_dentry)) {
                spin_lock(&inode->i_lock);
                de = __d_find_alias(inode, 0);
                spin_unlock(&inode->i_lock);
@@ -753,9 +754,10 @@ EXPORT_SYMBOL(d_find_alias);
 void d_prune_aliases(struct inode *inode)
 {
        struct dentry *dentry;
+       struct hlist_node *p;
 restart:
        spin_lock(&inode->i_lock);
-       list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                spin_lock(&dentry->d_lock);
                if (!dentry->d_count) {
                        __dget_dlock(dentry);
@@ -977,7 +979,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
                        inode = dentry->d_inode;
                        if (inode) {
                                dentry->d_inode = NULL;
-                               list_del_init(&dentry->d_alias);
+                               hlist_del_init(&dentry->d_alias);
                                if (dentry->d_op && dentry->d_op->d_iput)
                                        dentry->d_op->d_iput(dentry, inode);
                                else
@@ -1312,7 +1314,7 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
        INIT_HLIST_BL_NODE(&dentry->d_hash);
        INIT_LIST_HEAD(&dentry->d_lru);
        INIT_LIST_HEAD(&dentry->d_subdirs);
-       INIT_LIST_HEAD(&dentry->d_alias);
+       INIT_HLIST_NODE(&dentry->d_alias);
        INIT_LIST_HEAD(&dentry->d_u.d_child);
        d_set_d_op(dentry, dentry->d_sb->s_d_op);
 
@@ -1400,7 +1402,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
        if (inode) {
                if (unlikely(IS_AUTOMOUNT(inode)))
                        dentry->d_flags |= DCACHE_NEED_AUTOMOUNT;
-               list_add(&dentry->d_alias, &inode->i_dentry);
+               hlist_add_head(&dentry->d_alias, &inode->i_dentry);
        }
        dentry->d_inode = inode;
        dentry_rcuwalk_barrier(dentry);
@@ -1425,7 +1427,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
  
 void d_instantiate(struct dentry *entry, struct inode * inode)
 {
-       BUG_ON(!list_empty(&entry->d_alias));
+       BUG_ON(!hlist_unhashed(&entry->d_alias));
        if (inode)
                spin_lock(&inode->i_lock);
        __d_instantiate(entry, inode);
@@ -1458,13 +1460,14 @@ static struct dentry *__d_instantiate_unique(struct dentry *entry,
        int len = entry->d_name.len;
        const char *name = entry->d_name.name;
        unsigned int hash = entry->d_name.hash;
+       struct hlist_node *p;
 
        if (!inode) {
                __d_instantiate(entry, NULL);
                return NULL;
        }
 
-       list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
                /*
                 * Don't need alias->d_lock here, because aliases with
                 * d_parent == entry->d_parent are not subject to name or
@@ -1490,7 +1493,7 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
 {
        struct dentry *result;
 
-       BUG_ON(!list_empty(&entry->d_alias));
+       BUG_ON(!hlist_unhashed(&entry->d_alias));
 
        if (inode)
                spin_lock(&inode->i_lock);
@@ -1531,9 +1534,9 @@ static struct dentry * __d_find_any_alias(struct inode *inode)
 {
        struct dentry *alias;
 
-       if (list_empty(&inode->i_dentry))
+       if (hlist_empty(&inode->i_dentry))
                return NULL;
-       alias = list_first_entry(&inode->i_dentry, struct dentry, d_alias);
+       alias = hlist_entry(inode->i_dentry.first, struct dentry, d_alias);
        __dget(alias);
        return alias;
 }
@@ -1607,7 +1610,7 @@ struct dentry *d_obtain_alias(struct inode *inode)
        spin_lock(&tmp->d_lock);
        tmp->d_inode = inode;
        tmp->d_flags |= DCACHE_DISCONNECTED;
-       list_add(&tmp->d_alias, &inode->i_dentry);
+       hlist_add_head(&tmp->d_alias, &inode->i_dentry);
        hlist_bl_lock(&tmp->d_sb->s_anon);
        hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon);
        hlist_bl_unlock(&tmp->d_sb->s_anon);

diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index b0201ca..b42063c 100644 (file)
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -44,13 +44,14 @@ find_acceptable_alias(struct dentry *result,
 {
        struct dentry *dentry, *toput = NULL;
        struct inode *inode;
+       struct hlist_node *p;
 
        if (acceptable(context, result))
                return result;
 
        inode = result->d_inode;
        spin_lock(&inode->i_lock);
-       list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                dget(dentry);
                spin_unlock(&inode->i_lock);
                if (toput)

diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 4359a4d..2a1dcea 100644 (file)
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -225,7 +225,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 
        if (!journal) {
                ret = __sync_inode(inode, datasync);
-               if (!ret && !list_empty(&inode->i_dentry))
+               if (!ret && !hlist_empty(&inode->i_dentry))
                        ret = ext4_sync_parent(inode);
                goto out;
        }

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 334e0b1..f7543f7 100644 (file)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -249,7 +249,7 @@ static struct dentry *fuse_d_add_directory(struct dentry *entry,
                /* This tries to shrink the subtree below alias */
                fuse_invalidate_entry(alias);
                dput(alias);
-               if (!list_empty(&inode->i_dentry))
+               if (!hlist_empty(&inode->i_dentry))
                        return ERR_PTR(-EBUSY);
        } else {
                dput(alias);

diff --git a/fs/inode.c b/fs/inode.c
index c99163b..775cbab 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -182,7 +182,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
        }
        inode->i_private = NULL;
        inode->i_mapping = mapping;
-       INIT_LIST_HEAD(&inode->i_dentry);       /* buggered by rcu freeing */
+       INIT_HLIST_HEAD(&inode->i_dentry);      /* buggered by rcu freeing */
 #ifdef CONFIG_FS_POSIX_ACL
        inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
 #endif

diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 8abfb19..a67990f 100644 (file)
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -62,7 +62,7 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
                 */
                spin_lock(&sb->s_root->d_inode->i_lock);
                spin_lock(&sb->s_root->d_lock);
-               list_del_init(&sb->s_root->d_alias);
+               hlist_del_init(&sb->s_root->d_alias);
                spin_unlock(&sb->s_root->d_lock);
                spin_unlock(&sb->s_root->d_inode->i_lock);
        }

diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index b39c5c1..6baadb5 100644 (file)
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -52,6 +52,7 @@ void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
 void __fsnotify_update_child_dentry_flags(struct inode *inode)
 {
        struct dentry *alias;
+       struct hlist_node *p;
        int watched;
 
        if (!S_ISDIR(inode->i_mode))
@@ -63,7 +64,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
        spin_lock(&inode->i_lock);
        /* run all of the dentries associated with this inode.  Since this is a
         * directory, there damn well better only be one item on this list */
-       list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
                struct dentry *child;
 
                /* run all of the children of the original inode and fix their

diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index a40edc1..af44882 100644 (file)
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -170,10 +170,11 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
                                      u64 parent_blkno,
                                      int skip_unhashed)
 {
+       struct hlist_node *p;
        struct dentry *dentry;
 
        spin_lock(&inode->i_lock);
-       list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+       hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                spin_lock(&dentry->d_lock);
                if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
                        trace_ocfs2_find_local_alias(dentry->d_name.len,

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 094789f..8ca2555 100644 (file)
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -128,7 +128,7 @@ struct dentry {
                struct rcu_head d_rcu;
        } d_u;
        struct list_head d_subdirs;     /* our children */
-       struct list_head d_alias;       /* inode alias list */
+       struct hlist_node d_alias;      /* inode alias list */
 };
 
 /*

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 17fd887..f06db6b 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -826,7 +826,7 @@ struct inode {
        struct list_head        i_lru;          /* inode LRU list */
        struct list_head        i_sb_list;
        union {
-               struct list_head        i_dentry;
+               struct hlist_head       i_dentry;
                struct rcu_head         i_rcu;
        };
        u64                     i_version;