Related: #1953669 - copy: ensure we enforce --reflink=never
This commit is contained in:
Kamil Dudka
parent
253ea1189f
commit
4d564a0f24
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@ -1,7 +1,7 @@
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From 5f2dac18054d9d9b3d84e7fba8c2a6e750d2c245 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
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Date: Wed, 1 Apr 2020 12:51:34 +0100
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Subject: [PATCH 1/6] cp: ensure --attributes-only doesn't remove files
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Subject: [PATCH 1/7] cp: ensure --attributes-only doesn't remove files
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* src/copy.c (copy_internal): Ensure we don't unlink the destination
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unless explicitly requested.
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@ -77,7 +77,7 @@ index 59ce641..14fc844 100755
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From c728747b06e71894c96d1f27434f2484af992c75 Mon Sep 17 00:00:00 2001
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From: Paul Eggert <eggert@cs.ucla.edu>
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Date: Tue, 23 Jun 2020 19:18:04 -0700
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Subject: [PATCH 2/6] cp: refactor extent_copy
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Subject: [PATCH 2/7] cp: refactor extent_copy
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* src/copy.c (extent_copy): New arg SCAN, replacing
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REQUIRE_NORMAL_COPY. All callers changed.
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@ -320,7 +320,7 @@ index 54601ce..f694f91 100644
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From ed7ff81de507bef46991f4caac550f41ab65e3ed Mon Sep 17 00:00:00 2001
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From: Paul Eggert <eggert@cs.ucla.edu>
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Date: Wed, 24 Jun 2020 17:05:20 -0700
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Subject: [PATCH 3/6] cp: avoid copy_reg goto
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Subject: [PATCH 3/7] cp: avoid copy_reg goto
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* src/copy.c (copy_reg): Redo to avoid label and goto.
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@ -390,7 +390,7 @@ index f694f91..b382cfa 100644
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From 5631bded3a385ca0bbd77456b50767fe5580240c Mon Sep 17 00:00:00 2001
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From: Paul Eggert <eggert@cs.ucla.edu>
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Date: Thu, 25 Jun 2020 16:31:44 -0700
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Subject: [PATCH 4/6] cp: use SEEK_DATA/SEEK_HOLE if available
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Subject: [PATCH 4/7] cp: use SEEK_DATA/SEEK_HOLE if available
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If it works, prefer lseek with SEEK_DATA and SEEK_HOLE to FIEMAP,
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as lseek is simpler and more portable (will be in next POSIX).
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@ -701,7 +701,7 @@ index b382cfa..d88f8cf 100644
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From be7466be92d779cfbece418d4de33191ae52ab4a Mon Sep 17 00:00:00 2001
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From: Kamil Dudka <kdudka@redhat.com>
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Date: Wed, 24 Mar 2021 16:06:53 +0100
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Subject: [PATCH 5/6] import the copy-file-range module from gnulib
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Subject: [PATCH 5/7] import the copy-file-range module from gnulib
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---
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aclocal.m4 | 1 +
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@ -896,7 +896,7 @@ index dead90e..953e7f0 100644
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From 48370c95bcf7c25ce021fbd2145062d3d29ae6d5 Mon Sep 17 00:00:00 2001
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From: Paul Eggert <eggert@cs.ucla.edu>
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Date: Thu, 25 Jun 2020 17:34:23 -0700
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Subject: [PATCH 6/6] cp: use copy_file_range if available
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Subject: [PATCH 6/7] cp: use copy_file_range if available
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* NEWS: Mention this.
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* bootstrap.conf (gnulib_modules): Add copy-file-range.
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@ -976,3 +976,109 @@ index d88f8cf..4050f69 100644
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--
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2.26.3
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From cd7c7a6b5ad89ef0a61722552d532901fc1bed05 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
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Date: Sun, 2 May 2021 21:27:17 +0100
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Subject: [PATCH 7/7] copy: ensure we enforce --reflink=never
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* src/copy.c (sparse_copy): Don't use copy_file_range()
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with --reflink=never as copy_file_range() may implicitly
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use acceleration techniques like reflinking.
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(extent_copy): Pass through whether we allow reflinking.
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(lseek_copy): Likewise.
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Fixes https://bugs.gnu.org/48164
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Upstream-commit: ea9af99234031ab8d5169c8a669434e2a6b4f864
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Signed-off-by: Kamil Dudka <kdudka@redhat.com>
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---
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src/copy.c | 20 +++++++++++++-------
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1 file changed, 13 insertions(+), 7 deletions(-)
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diff --git a/src/copy.c b/src/copy.c
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index 4050f69..0337538 100644
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--- a/src/copy.c
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+++ b/src/copy.c
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@@ -258,7 +258,7 @@ create_hole (int fd, char const *name, bool punch_holes, off_t size)
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bytes read. */
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static bool
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sparse_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
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- size_t hole_size, bool punch_holes,
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+ size_t hole_size, bool punch_holes, bool allow_reflink,
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char const *src_name, char const *dst_name,
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uintmax_t max_n_read, off_t *total_n_read,
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bool *last_write_made_hole)
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@@ -266,8 +266,9 @@ sparse_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
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*last_write_made_hole = false;
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*total_n_read = 0;
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- /* If not looking for holes, use copy_file_range if available. */
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- if (!hole_size)
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+ /* If not looking for holes, use copy_file_range if available,
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+ but don't use if reflink disallowed as that may be implicit. */
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+ if ((! hole_size) && allow_reflink)
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while (max_n_read)
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{
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/* Copy at most COPY_MAX bytes at a time; this is min
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@@ -466,6 +467,7 @@ static bool
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extent_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
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size_t hole_size, off_t src_total_size,
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enum Sparse_type sparse_mode,
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+ bool allow_reflink,
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char const *src_name, char const *dst_name,
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struct extent_scan *scan)
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{
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@@ -579,8 +581,8 @@ extent_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
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if ( ! sparse_copy (src_fd, dest_fd, buf, buf_size,
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sparse_mode == SPARSE_ALWAYS ? hole_size: 0,
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- true, src_name, dst_name, ext_len, &n_read,
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- &read_hole))
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+ true, allow_reflink, src_name, dst_name,
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+ ext_len, &n_read, &read_hole))
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goto fail;
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dest_pos = ext_start + n_read;
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@@ -655,6 +657,7 @@ static bool
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lseek_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
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size_t hole_size, off_t ext_start, off_t src_total_size,
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enum Sparse_type sparse_mode,
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+ bool allow_reflink,
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char const *src_name, char const *dst_name)
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{
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off_t last_ext_start = 0;
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@@ -729,8 +732,8 @@ lseek_copy (int src_fd, int dest_fd, char *buf, size_t buf_size,
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bool read_hole;
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if ( ! sparse_copy (src_fd, dest_fd, buf, buf_size,
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sparse_mode == SPARSE_NEVER ? 0 : hole_size,
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- true, src_name, dst_name, ext_len, &n_read,
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- &read_hole))
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+ true, allow_reflink, src_name, dst_name,
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+ ext_len, &n_read, &read_hole))
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return false;
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dest_pos = ext_start + n_read;
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@@ -1527,17 +1530,20 @@ copy_reg (char const *src_name, char const *dst_name,
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? extent_copy (source_desc, dest_desc, buf, buf_size, hole_size,
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src_open_sb.st_size,
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make_holes ? x->sparse_mode : SPARSE_NEVER,
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+ x->reflink_mode != REFLINK_NEVER,
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src_name, dst_name, &scan_inference.extent_scan)
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#ifdef SEEK_HOLE
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: scantype == LSEEK_SCANTYPE
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? lseek_copy (source_desc, dest_desc, buf, buf_size, hole_size,
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scan_inference.ext_start, src_open_sb.st_size,
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make_holes ? x->sparse_mode : SPARSE_NEVER,
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+ x->reflink_mode != REFLINK_NEVER,
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src_name, dst_name)
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#endif
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: sparse_copy (source_desc, dest_desc, buf, buf_size,
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make_holes ? hole_size : 0,
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x->sparse_mode == SPARSE_ALWAYS,
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+ x->reflink_mode != REFLINK_NEVER,
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src_name, dst_name, UINTMAX_MAX, &n_read,
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&wrote_hole_at_eof)))
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{
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--
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2.30.2
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@ -1,7 +1,7 @@
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Summary: A set of basic GNU tools commonly used in shell scripts
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Name: coreutils
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Version: 8.32
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Release: 24%{?dist}
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Release: 25%{?dist}
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License: GPLv3+
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Url: https://www.gnu.org/software/coreutils/
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Source0: https://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz
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@ -311,6 +311,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
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%license COPYING
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%changelog
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* Mon May 03 2021 Kamil Dudka <kdudka@redhat.com> - 8.32-25
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- copy: ensure we enforce --reflink=never
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* Tue Apr 27 2021 Kamil Dudka <kdudka@redhat.com> - 8.32-24
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- copy: do not refuse to copy a swap file (#1953669)
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