if we have mkdir request reported successful *and* simulating lookup
gets us a non-directory (which is possible if another client has
managed to get rmdir and create in between), the sane action is not
to mangle ->i_mode of non-directory inode to S_IFDIR | mode, it's
"report success and return with dentry negative unhashed" - that
way the next lookup will do the right thing.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
fs/cifs/inode.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index d46b36d52211..80c487fcf10e 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1739,6 +1739,16 @@ cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
if (rc)
return rc;
+ if (!S_ISDIR(inode->i_mode)) {
+ /*
+ * mkdir succeeded, but another client has managed to remove the
+ * sucker and replace it with non-directory. Return success,
+ * but don't leave the child in dcache.
+ */
+ iput(inode);
+ d_drop(dentry);
+ return 0;
+ }
/*
* setting nlink not necessary except in cases where we failed to get it
* from the server or was set bogus. Also, since this is a brand new
@@ -1790,7 +1800,7 @@ cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode,
}
}
d_instantiate(dentry, inode);
- return rc;
+ return 0;
}
static int
--
2.11.0
