Related: #1953669 - copy: ensure we enforce --reflink=never

This commit is contained in:
Kamil Dudka 2021-05-03 12:31:07 +02:00
parent 56555a47f2
commit 3a336cf37e
2 changed files with 116 additions and 7 deletions

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@ -1,7 +1,7 @@
From 5f2dac18054d9d9b3d84e7fba8c2a6e750d2c245 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
Date: Wed, 1 Apr 2020 12:51:34 +0100
Subject: [PATCH 1/6] cp: ensure --attributes-only doesn't remove files
Subject: [PATCH 1/7] cp: ensure --attributes-only doesn't remove files
* src/copy.c (copy_internal): Ensure we don't unlink the destination
unless explicitly requested.
@ -77,7 +77,7 @@ index 59ce641..14fc844 100755
From c728747b06e71894c96d1f27434f2484af992c75 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 23 Jun 2020 19:18:04 -0700
Subject: [PATCH 2/6] cp: refactor extent_copy
Subject: [PATCH 2/7] cp: refactor extent_copy
* src/copy.c (extent_copy): New arg SCAN, replacing
REQUIRE_NORMAL_COPY. All callers changed.
@ -320,7 +320,7 @@ index 54601ce..f694f91 100644
From ed7ff81de507bef46991f4caac550f41ab65e3ed Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 24 Jun 2020 17:05:20 -0700
Subject: [PATCH 3/6] cp: avoid copy_reg goto
Subject: [PATCH 3/7] cp: avoid copy_reg goto
* src/copy.c (copy_reg): Redo to avoid label and goto.
@ -390,7 +390,7 @@ index f694f91..b382cfa 100644
From 5631bded3a385ca0bbd77456b50767fe5580240c Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Thu, 25 Jun 2020 16:31:44 -0700
Subject: [PATCH 4/6] cp: use SEEK_DATA/SEEK_HOLE if available
Subject: [PATCH 4/7] cp: use SEEK_DATA/SEEK_HOLE if available
If it works, prefer lseek with SEEK_DATA and SEEK_HOLE to FIEMAP,
as lseek is simpler and more portable (will be in next POSIX).
@ -701,7 +701,7 @@ index b382cfa..d88f8cf 100644
From be7466be92d779cfbece418d4de33191ae52ab4a Mon Sep 17 00:00:00 2001
From: Kamil Dudka <kdudka@redhat.com>
Date: Wed, 24 Mar 2021 16:06:53 +0100
Subject: [PATCH 5/6] import the copy-file-range module from gnulib
Subject: [PATCH 5/7] import the copy-file-range module from gnulib
---
aclocal.m4 | 1 +
@ -896,7 +896,7 @@ index dead90e..953e7f0 100644
From 48370c95bcf7c25ce021fbd2145062d3d29ae6d5 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Thu, 25 Jun 2020 17:34:23 -0700
Subject: [PATCH 6/6] cp: use copy_file_range if available
Subject: [PATCH 6/7] cp: use copy_file_range if available
* NEWS: Mention this.
* bootstrap.conf (gnulib_modules): Add copy-file-range.
@ -976,3 +976,109 @@ index d88f8cf..4050f69 100644
--
2.26.3
From cd7c7a6b5ad89ef0a61722552d532901fc1bed05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
Date: Sun, 2 May 2021 21:27:17 +0100
Subject: [PATCH 7/7] copy: ensure we enforce --reflink=never
* src/copy.c (sparse_copy): Don't use copy_file_range()
with --reflink=never as copy_file_range() may implicitly
use acceleration techniques like reflinking.
(extent_copy): Pass through whether we allow reflinking.
(lseek_copy): Likewise.
Fixes https://bugs.gnu.org/48164
Upstream-commit: ea9af99234031ab8d5169c8a669434e2a6b4f864
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
src/copy.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/src/copy.c b/src/copy.c
index 4050f69..0337538 100644
--- a/src/copy.c
+++ b/src/copy.c
@@ -258,7 +258,7 @@ create_hole (int fd, char const *name, bool punch_holes, off_t size)
bytes read. */
static bool
sparse_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
- size_t hole_size, bool punch_holes,
+ size_t hole_size, bool punch_holes, bool allow_reflink,
char const *src_name, char const *dst_name,
uintmax_t max_n_read, off_t *total_n_read,
bool *last_write_made_hole)
@@ -266,8 +266,9 @@ sparse_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
*last_write_made_hole = false;
*total_n_read = 0;
- /* If not looking for holes, use copy_file_range if available. */
- if (!hole_size)
+ /* If not looking for holes, use copy_file_range if available,
+ but don't use if reflink disallowed as that may be implicit. */
+ if ((! hole_size) && allow_reflink)
while (max_n_read)
{
/* Copy at most COPY_MAX bytes at a time; this is min
@@ -466,6 +467,7 @@ static bool
extent_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
size_t hole_size, off_t src_total_size,
enum Sparse_type sparse_mode,
+ bool allow_reflink,
char const *src_name, char const *dst_name,
struct extent_scan *scan)
{
@@ -579,8 +581,8 @@ extent_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
if ( ! sparse_copy (src_fd, dest_fd, buf, buf_size,
sparse_mode == SPARSE_ALWAYS ? hole_size: 0,
- true, src_name, dst_name, ext_len, &n_read,
- &read_hole))
+ true, allow_reflink, src_name, dst_name,
+ ext_len, &n_read, &read_hole))
goto fail;
dest_pos = ext_start + n_read;
@@ -655,6 +657,7 @@ static bool
lseek_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
size_t hole_size, off_t ext_start, off_t src_total_size,
enum Sparse_type sparse_mode,
+ bool allow_reflink,
char const *src_name, char const *dst_name)
{
off_t last_ext_start = 0;
@@ -729,8 +732,8 @@ lseek_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
bool read_hole;
if ( ! sparse_copy (src_fd, dest_fd, buf, buf_size,
sparse_mode == SPARSE_NEVER ? 0 : hole_size,
- true, src_name, dst_name, ext_len, &n_read,
- &read_hole))
+ true, allow_reflink, src_name, dst_name,
+ ext_len, &n_read, &read_hole))
return false;
dest_pos = ext_start + n_read;
@@ -1527,17 +1530,20 @@ copy_reg (char const *src_name, char const *dst_name,
? extent_copy (source_desc, dest_desc, buf, buf_size, hole_size,
src_open_sb.st_size,
make_holes ? x->sparse_mode : SPARSE_NEVER,
+ x->reflink_mode != REFLINK_NEVER,
src_name, dst_name, &scan_inference.extent_scan)
#ifdef SEEK_HOLE
: scantype == LSEEK_SCANTYPE
? lseek_copy (source_desc, dest_desc, buf, buf_size, hole_size,
scan_inference.ext_start, src_open_sb.st_size,
make_holes ? x->sparse_mode : SPARSE_NEVER,
+ x->reflink_mode != REFLINK_NEVER,
src_name, dst_name)
#endif
: sparse_copy (source_desc, dest_desc, buf, buf_size,
make_holes ? hole_size : 0,
x->sparse_mode == SPARSE_ALWAYS,
+ x->reflink_mode != REFLINK_NEVER,
src_name, dst_name, UINTMAX_MAX, &n_read,
&wrote_hole_at_eof)))
{
--
2.30.2

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@ -1,7 +1,7 @@
Summary: A set of basic GNU tools commonly used in shell scripts
Name: coreutils
Version: 8.32
Release: 23%{?dist}
Release: 24%{?dist}
License: GPLv3+
Url: https://www.gnu.org/software/coreutils/
Source0: https://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz
@ -311,6 +311,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
%license COPYING
%changelog
* Mon May 03 2021 Kamil Dudka <kdudka@redhat.com> - 8.32-24
- copy: ensure we enforce --reflink=never
* Tue Apr 27 2021 Kamil Dudka <kdudka@redhat.com> - 8.32-23
- copy: do not refuse to copy a swap file