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authorTrond Myklebust <trond.myklebust@hammerspace.com>2022-05-14 17:27:02 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2022-05-17 19:01:59 +0300
commite6005436f6cc9ed13288f936903f0151e5543485 (patch)
tree6cdf43e1cfc2637b7e2886cc58606d2545c02e9c /fs/nfs
parent9641d9bc9b75f11f70646f5c6ee9f5f519a1012e (diff)
downloadlinux-e6005436f6cc9ed13288f936903f0151e5543485.tar.xz
NFS: Don't report ENOSPC write errors twice
Any errors reported by the write() system call need to be cleared from the file descriptor's error tracking. The current call to nfs_wb_all() causes the error to be reported, but since it doesn't call file_check_and_advance_wb_err(), we can end up reporting the same error a second time when the application calls fsync(). Note that since Linux 4.13, the rule is that EIO may be reported for write(), but it must be reported by a subsequent fsync(), so let's just drop reporting it in write. The check for nfs_ctx_key_to_expire() is just a duplicate to the one already in nfs_write_end(), so let's drop that too. Reported-by: ChenXiaoSong <chenxiaosong2@huawei.com> Fixes: ce368536dd61 ("nfs: nfs_file_write() should check for writeback errors") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/file.c34
1 files changed, 14 insertions, 20 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 7c380e555224..87e4cd5e8fe2 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -598,18 +598,6 @@ static const struct vm_operations_struct nfs_file_vm_ops = {
.page_mkwrite = nfs_vm_page_mkwrite,
};
-static int nfs_need_check_write(struct file *filp, struct inode *inode,
- int error)
-{
- struct nfs_open_context *ctx;
-
- ctx = nfs_file_open_context(filp);
- if (nfs_error_is_fatal_on_server(error) ||
- nfs_ctx_key_to_expire(ctx, inode))
- return 1;
- return 0;
-}
-
ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
@@ -637,7 +625,7 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
if (iocb->ki_flags & IOCB_APPEND || iocb->ki_pos > i_size_read(inode)) {
result = nfs_revalidate_file_size(inode, file);
if (result)
- goto out;
+ return result;
}
nfs_clear_invalid_mapping(file->f_mapping);
@@ -656,6 +644,7 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
written = result;
iocb->ki_pos += written;
+ nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
if (mntflags & NFS_MOUNT_WRITE_EAGER) {
result = filemap_fdatawrite_range(file->f_mapping,
@@ -673,17 +662,22 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
}
result = generic_write_sync(iocb, written);
if (result < 0)
- goto out;
+ return result;
+out:
/* Return error values */
error = filemap_check_wb_err(file->f_mapping, since);
- if (nfs_need_check_write(file, inode, error)) {
- int err = nfs_wb_all(inode);
- if (err < 0)
- result = err;
+ switch (error) {
+ default:
+ break;
+ case -EDQUOT:
+ case -EFBIG:
+ case -ENOSPC:
+ nfs_wb_all(inode);
+ error = file_check_and_advance_wb_err(file);
+ if (error < 0)
+ result = error;
}
- nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
-out:
return result;
out_swapfile: