linux-kernel - [PATCH] xfs: xfs_nfs_get_inode support zero generation

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Date:   Thu, 11 May 2023 18:17:21 +0800
From:   renlei1@...natelecom.cn
To:     djwong@...nel.org
Cc:     linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ren Lei <renlei1@...natelecom.cn>
Subject: [PATCH] xfs: xfs_nfs_get_inode support zero generation

From: Ren Lei <renlei1@...natelecom.cn>

If generation is zero, bypass the verification of generation number
to avoid stale file error. (Be consistent with other fs, such as
ext4, fat, jfs, etc.)

Signed-off-by: Ren Lei<renlei1@...natelecom.cn>
---
 fs/xfs/xfs_export.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 1064c2342876..cbee32c5ad37 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -146,7 +146,7 @@ xfs_nfs_get_inode(
 		return ERR_PTR(error);
 	}
 
-	if (VFS_I(ip)->i_generation != generation) {
+	if (generation && VFS_I(ip)->i_generation != generation) {
 		xfs_irele(ip);
 		return ERR_PTR(-ESTALE);
 	}
-- 
2.27.0