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pull rehashing and unlocking the target dentry into __d_materialise_dentry()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-09-26 21:20:39 -04:00
parent e4502c63f5
commit 5cc3821b57
1 changed files with 4 additions and 7 deletions

11
fs/dcache.c
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@ -2636,7 +2636,6 @@ out_err:
/* /*
* Prepare an anonymous dentry for life in the superblock's dentry tree as a * Prepare an anonymous dentry for life in the superblock's dentry tree as a
* named dentry in place of the dentry to be replaced. * named dentry in place of the dentry to be replaced.
* returns with anon->d_lock held!
*/ */
static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon) static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
{ {
@ -2655,21 +2654,21 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
dentry->d_parent = dentry; dentry->d_parent = dentry;
list_del_init(&dentry->d_u.d_child); list_del_init(&dentry->d_u.d_child);
anon->d_parent = dparent; anon->d_parent = dparent;
list_move(&anon->d_u.d_child, &dparent->d_subdirs);
if (likely(!d_unhashed(anon))) { if (likely(!d_unhashed(anon))) {
hlist_bl_lock(&anon->d_sb->s_anon); hlist_bl_lock(&anon->d_sb->s_anon);
__hlist_bl_del(&anon->d_hash); __hlist_bl_del(&anon->d_hash);
anon->d_hash.pprev = NULL; anon->d_hash.pprev = NULL;
hlist_bl_unlock(&anon->d_sb->s_anon); hlist_bl_unlock(&anon->d_sb->s_anon);
} }
list_move(&anon->d_u.d_child, &dparent->d_subdirs); __d_rehash(anon, d_hash(anon->d_parent, anon->d_name.hash));
write_seqcount_end(&dentry->d_seq); write_seqcount_end(&dentry->d_seq);
write_seqcount_end(&anon->d_seq); write_seqcount_end(&anon->d_seq);
dentry_unlock_parents_for_move(anon, dentry); dentry_unlock_parents_for_move(anon, dentry);
spin_unlock(&dentry->d_lock); spin_unlock(&dentry->d_lock);
spin_unlock(&anon->d_lock);
/* anon->d_lock still locked, returns locked */
} }
/** /**
@ -2719,8 +2718,6 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
write_seqlock(&rename_lock); write_seqlock(&rename_lock);
__d_materialise_dentry(dentry, new); __d_materialise_dentry(dentry, new);
write_sequnlock(&rename_lock); write_sequnlock(&rename_lock);
_d_rehash(new);
spin_unlock(&new->d_lock);
spin_unlock(&inode->i_lock); spin_unlock(&inode->i_lock);
security_d_instantiate(new, inode); security_d_instantiate(new, inode);
iput(inode); iput(inode);
@ -2811,9 +2808,9 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode)
BUG_ON(!d_unhashed(actual)); BUG_ON(!d_unhashed(actual));
spin_lock(&actual->d_lock); spin_lock(&actual->d_lock);
found:
_d_rehash(actual); _d_rehash(actual);
spin_unlock(&actual->d_lock); spin_unlock(&actual->d_lock);
found:
spin_unlock(&inode->i_lock); spin_unlock(&inode->i_lock);
out_nolock: out_nolock:
if (actual == dentry) { if (actual == dentry) {