Patch "NFSD: Refactor nfsd4_do_copy()" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    NFSD: Refactor nfsd4_do_copy()

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     nfsd-refactor-nfsd4_do_copy.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit ecf108709139d5eaec1725f0fccf64ce1d78d8e5
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date:   Wed Jul 27 14:40:59 2022 -0400

    NFSD: Refactor nfsd4_do_copy()
    
    [ Upstream commit 3b7bf5933cada732783554edf0dc61283551c6cf ]
    
    Refactor: Now that nfsd4_do_copy() no longer calls the cleanup
    helpers, plumb the use of struct file pointers all the way down to
    _nfsd_copy_file_range().
    
    Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 5d05bb7a0c0f6..16f968c165c98 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1660,10 +1660,10 @@ static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
 	gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
 }
 
-static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
+static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy,
+				     struct file *dst,
+				     struct file *src)
 {
-	struct file *dst = copy->nf_dst->nf_file;
-	struct file *src = copy->nf_src->nf_file;
 	errseq_t since;
 	ssize_t bytes_copied = 0;
 	u64 bytes_total = copy->cp_count;
@@ -1699,12 +1699,15 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
 	return bytes_copied;
 }
 
-static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
+static __be32 nfsd4_do_copy(struct nfsd4_copy *copy,
+			    struct file *src, struct file *dst,
+			    bool sync)
 {
 	__be32 status;
 	ssize_t bytes;
 
-	bytes = _nfsd_copy_file_range(copy);
+	bytes = _nfsd_copy_file_range(copy, dst, src);
+
 	/* for async copy, we ignore the error, client can always retry
 	 * to get the error
 	 */
@@ -1769,11 +1772,13 @@ static int nfsd4_do_async_copy(void *data)
 			/* ss_mnt will be unmounted by the laundromat */
 			goto do_callback;
 		}
-		copy->nfserr = nfsd4_do_copy(copy, 0);
+		copy->nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
+					     copy->nf_dst->nf_file, false);
 		nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src->nf_file,
 					copy->nf_dst);
 	} else {
-		copy->nfserr = nfsd4_do_copy(copy, 0);
+		copy->nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
+					     copy->nf_dst->nf_file, false);
 		nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
 	}
 
@@ -1851,7 +1856,8 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		wake_up_process(async_copy->copy_task);
 		status = nfs_ok;
 	} else {
-		status = nfsd4_do_copy(copy, 1);
+		status = nfsd4_do_copy(copy, copy->nf_src->nf_file,
+				       copy->nf_dst->nf_file, true);
 		nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
 	}
 out: