[PATCH v3 09/11] fix error reporting in v9fs_dir_release

From: Eric Van Hensbergen <ericvh@kernel.org>
To: v9fs-developer@lists.sourceforge.net, asmadeus@codewreck.org,
	rminnich@gmail.com, lucho@ionkov.net
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux_oss@crudebyte.com, Eric Van Hensbergen <ericvh@kernel.org>
Subject: [PATCH v3 09/11] fix error reporting in v9fs_dir_release
Date: Tue, 24 Jan 2023 02:38:32 +0000	[thread overview]
Message-ID: <20230124023834.106339-10-ericvh@kernel.org> (raw)
In-Reply-To: <20230124023834.106339-1-ericvh@kernel.org>

Checking the p9_fid_put value allows us to pass back errors
involved if we end up clunking the fid as part of dir_release.

This can help with more graceful response to errors in writeback
among other things.

Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
---
 fs/9p/vfs_dir.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index ec831c27a58e..1fc07bb86e6f 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -197,7 +197,7 @@ static int v9fs_dir_readdir_dotl(struct file *file, struct dir_context *ctx)
 
 
 /**
- * v9fs_dir_release - close a directory
+ * v9fs_dir_release - called on a close of a file or directory
  * @inode: inode of the directory
  * @filp: file pointer to a directory
  *
@@ -209,6 +209,7 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
 	struct p9_fid *fid;
 	__le32 version;
 	loff_t i_size;
+	int retval = 0;
 
 	fid = filp->private_data;
 	p9_debug(P9_DEBUG_VFS, "inode: %p filp: %p fid: %d\n",
@@ -226,7 +227,7 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
 		spin_lock(&inode->i_lock);
 		hlist_del(&fid->ilist);
 		spin_unlock(&inode->i_lock);
-		p9_fid_put(fid);
+		retval = p9_fid_put(fid);
 	}
 
 	if ((filp->f_mode & FMODE_WRITE)) {
@@ -237,7 +238,7 @@ int v9fs_dir_release(struct inode *inode, struct file *filp)
 	} else {
 		fscache_unuse_cookie(v9fs_inode_cookie(v9inode), NULL, NULL);
 	}
-	return 0;
+	return retval;
 }
 
 const struct file_operations v9fs_dir_operations = {
-- 
2.37.2

