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path: root/fs/overlayfs/export.c
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Diffstat (limited to 'fs/overlayfs/export.c')
-rw-r--r--fs/overlayfs/export.c38
1 files changed, 21 insertions, 17 deletions
diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c
index a58b3d9b06b9..475c61f53f0f 100644
--- a/fs/overlayfs/export.c
+++ b/fs/overlayfs/export.c
@@ -308,31 +308,35 @@ static struct dentry *ovl_obtain_alias(struct super_block *sb,
ovl_set_flag(OVL_UPPERDATA, inode);
dentry = d_find_any_alias(inode);
- if (!dentry) {
- dentry = d_alloc_anon(inode->i_sb);
- if (!dentry)
- goto nomem;
- oe = ovl_alloc_entry(lower ? 1 : 0);
- if (!oe)
- goto nomem;
-
- if (lower) {
- oe->lowerstack->dentry = dget(lower);
- oe->lowerstack->layer = lowerpath->layer;
- }
- dentry->d_fsdata = oe;
- if (upper_alias)
- ovl_dentry_set_upper_alias(dentry);
+ if (dentry)
+ goto out_iput;
+
+ dentry = d_alloc_anon(inode->i_sb);
+ if (unlikely(!dentry))
+ goto nomem;
+ oe = ovl_alloc_entry(lower ? 1 : 0);
+ if (!oe)
+ goto nomem;
+
+ if (lower) {
+ oe->lowerstack->dentry = dget(lower);
+ oe->lowerstack->layer = lowerpath->layer;
}
+ dentry->d_fsdata = oe;
+ if (upper_alias)
+ ovl_dentry_set_upper_alias(dentry);
+
ovl_dentry_update_reval(dentry, upper,
DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE);
return d_instantiate_anon(dentry, inode);
nomem:
- iput(inode);
dput(dentry);
- return ERR_PTR(-ENOMEM);
+ dentry = ERR_PTR(-ENOMEM);
+out_iput:
+ iput(inode);
+ return dentry;
}
/* Get the upper or lower dentry in stach whose on layer @idx */