btrfs-progs: scrub status: only report limits if at least one exists

(cherry picked from commit 2e0c469c69b41de2d417987eb9ea312f84a3a4d9)

0004-btrfs-progs-scrub-status-only-report-limits-if-at-le.patch

@@ -0,0 +1,59 @@
+From 8bca55d1e75d23a6fbb942ebd0525e105b982d9b Mon Sep 17 00:00:00 2001
+From: Jonas Malaco <jonas@protocubo.io>
+Date: Mon, 15 Jan 2024 08:17:38 -0300
+Subject: [PATCH] btrfs-progs: scrub status: only report limits if at least one
+ exists
+
+On multi-device filesystems, scrub status should report "some limits
+set" if at least one device has a scrub limit set.
+
+However, with btrfs-progs 6.6.3, this was being reported regardless of
+whether any limit actually being set:
+
+    # sudo btrfs scrub limit /more/butter
+    UUID: 989129d9-c96f-4d52-9d68-cbb6d9b2c499
+    Id  Limit       Path
+    --  -----  ---------
+     1      -  /dev/sdc1
+     2      -  /dev/sdd1
+
+    # sudo btrfs scrub status /more/butter/
+    UUID:             989129d9-c96f-4d52-9d68-cbb6d9b2c499
+    Scrub started:    Mon Jan 15 02:00:30 2024
+    Status:           running
+    Duration:         6:23:19
+    Time left:        0:49:08
+    ETA:              Mon Jan 15 09:12:57 2024
+    Total to scrub:   9.83TiB
+    Bytes scrubbed:   8.72TiB  (88.64%)
+    Rate:             397.47MiB/s (some device limits set)
+    Error summary:    no errors found
+
+Fix it by only setting `limit` to the special marker value 1 if at least
+one actual limit is found.
+
+Pull-request: #733
+Issue: #727
+Fixes: 7e4a235df1ac ("btrfs-progs: scrub status: print device speed limit in status if set")
+Signed-off-by: Jonas Malaco <jonas@protocubo.io>
+Signed-off-by: David Sterba <dsterba@suse.com>
+---
+ cmds/scrub.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/cmds/scrub.c b/cmds/scrub.c
+index acff1c0..3601713 100644
+--- a/cmds/scrub.c
++++ b/cmds/scrub.c
+@@ -387,7 +387,7 @@ static void print_fs_stat(struct scrub_fs_stat *fs_stat, int raw, u64 bytes_tota
+ 		 * Limit for the whole filesystem stats does not make sense,
+ 		 * but if there's any device with a limit then print it.
+ 		 */
+-		if (nr_devices != 1)
++		if (nr_devices != 1 && limit)
+ 			limit = 1;
+ 		print_scrub_summary(&fs_stat->p, &fs_stat->s, bytes_total, limit);
+ 	}
+-- 
+2.27.0
+

btrfs-progs.spec

@@ -1,6 +1,6 @@
 Name:       btrfs-progs
 Version:    6.6.3
-Release:    4
+Release:    5
 Summary:    btrfs userspace programs
 License:    GPLv2 and GPL+ and LGPL-2.1+ and GPL-3.0+ and LGPL-2.1 and MIT
 URL:        https://btrfs.wiki.kernel.org/index.php/Main_Page
@@ -9,6 +9,7 @@ Source0:    https://www.kernel.org/pub/linux/kernel/people/kdave/%{name}/%{name}
 Patch0001:  0001-fix-exclusive-op-enqueue-timeout.patch
 Patch0002:  0002-subvolume-fix-return-value-when-the-target-exists.patch
 Patch0003:  0003-fix-memory-leak-on-exit-path-in-table-vprintf.patch
+Patch0004:  0004-btrfs-progs-scrub-status-only-report-limits-if-at-le.patch
 
 BuildRequires:  python3-devel >= 3.4
 BuildRequires:  libacl-devel, e2fsprogs-devel, libblkid-devel, libuuid-devel, zlib-devel, libzstd-devel, lzo-devel, systemd-devel
@@ -74,6 +75,9 @@ make mandir=%{_mandir} bindir=%{_sbindir} libdir=%{_libdir} incdir=%{_includedir
 %{_mandir}/man8/*.gz
 
 %changelog
+* Thu Jun 6 2024 liuh <liuhuan01@kylinos.cn> - 6.6.3-5
+- backport patch from community
+
 * Wed May 22 2024 Deyuan Fan <fandeyuan@kylinos.cn> - 6.6.3-4
 - btrfs-progs: string-table: fix memory leak on exit path in table_vprintf()