| From a36a0f439231161eca75bc8d3dd8056ca7fe8559 Mon Sep 17 00:00:00 2001 |
| From: Scott Mayhew <smayhew@redhat.com> |
| Date: Sat, 1 Aug 2020 07:10:38 -0400 |
| Subject: [PATCH] nfs: ensure correct writeback errors are returned on close() |
| |
| commit 67dd23f9e6fbaf163431912ef5599c5e0693476c upstream. |
| |
| nfs_wb_all() calls filemap_write_and_wait(), which uses |
| filemap_check_errors() to determine the error to return. |
| filemap_check_errors() only looks at the mapping->flags and will |
| therefore only return either -ENOSPC or -EIO. To ensure that the |
| correct error is returned on close(), nfs{,4}_file_flush() should call |
| filemap_check_wb_err() which looks at the errseq value in |
| mapping->wb_err without consuming it. |
| |
| Fixes: 6fbda89b257f ("NFS: Replace custom error reporting mechanism with |
| generic one") |
| Signed-off-by: Scott Mayhew <smayhew@redhat.com> |
| Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/fs/nfs/file.c b/fs/nfs/file.c |
| index 95dc90570786..348f67c8f322 100644 |
| --- a/fs/nfs/file.c |
| +++ b/fs/nfs/file.c |
| @@ -140,6 +140,7 @@ static int |
| nfs_file_flush(struct file *file, fl_owner_t id) |
| { |
| struct inode *inode = file_inode(file); |
| + errseq_t since; |
| |
| dprintk("NFS: flush(%pD2)\n", file); |
| |
| @@ -148,7 +149,9 @@ nfs_file_flush(struct file *file, fl_owner_t id) |
| return 0; |
| |
| /* Flush writes to the server and return any errors */ |
| - return nfs_wb_all(inode); |
| + since = filemap_sample_wb_err(file->f_mapping); |
| + nfs_wb_all(inode); |
| + return filemap_check_wb_err(file->f_mapping, since); |
| } |
| |
| ssize_t |
| diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c |
| index cec32338562a..f39651196a7e 100644 |
| --- a/fs/nfs/nfs4file.c |
| +++ b/fs/nfs/nfs4file.c |
| @@ -109,6 +109,7 @@ static int |
| nfs4_file_flush(struct file *file, fl_owner_t id) |
| { |
| struct inode *inode = file_inode(file); |
| + errseq_t since; |
| |
| dprintk("NFS: flush(%pD2)\n", file); |
| |
| @@ -124,7 +125,9 @@ nfs4_file_flush(struct file *file, fl_owner_t id) |
| return filemap_fdatawrite(file->f_mapping); |
| |
| /* Flush writes to the server and return any errors */ |
| - return nfs_wb_all(inode); |
| + since = filemap_sample_wb_err(file->f_mapping); |
| + nfs_wb_all(inode); |
| + return filemap_check_wb_err(file->f_mapping, since); |
| } |
| |
| #ifdef CONFIG_NFS_V4_2 |
| -- |
| 2.27.0 |
| |