Re: [PATCH v2] resize.f2fs: add option to manually specify new overprovision
From: qixiaoyu1
Date: Mon Jun 20 2022 - 04:55:06 EST
From: liuchao12 <liuchao12@xxxxxxxxxx>
Make.f2fs supports manually specifying overprovision, and we expect
resize.f2fs to support it as well.
This change add a new '-o' option to manually specify overprovision,
and fix to check free space before grow. Otherwise, after grow,
kernel may report below error message when we mount the image if -o
parameter is specified during resize:
F2FS-fs (loop0): invalid crc_offset: 0
F2FS-fs (loop0): Wrong valid_user_blocks: 16404, user_block_count: 13312
F2FS-fs (loop0): Failed to get valid F2FS checkpoint
mount(2) system call failed: Structure needs cleaning.
Signed-off-by: qixiaoyu1 <qixiaoyu1@xxxxxxxxxx>
---
Change log form v1:
- merged fix to check free space before grow
- delete unessassary check of "c.new_overprovision == 0"
- update man page
fsck/main.c | 8 ++++++--
fsck/resize.c | 45 ++++++++++++++++++++++++++++++++-------------
man/resize.f2fs.8 | 9 +++++++++
3 files changed, 47 insertions(+), 15 deletions(-)
diff --git a/fsck/main.c b/fsck/main.c
index aef797e..3b4da0f 100644
--- a/fsck/main.c
+++ b/fsck/main.c
@@ -121,7 +121,8 @@ void resize_usage()
MSG(0, "[options]:\n");
MSG(0, " -d debug level [default:0]\n");
MSG(0, " -i extended node bitmap, node ratio is 20%% by default\n");
- MSG(0, " -s safe resize (Does not resize metadata)");
+ MSG(0, " -o overprovision percentage [default:auto]\n");
+ MSG(0, " -s safe resize (Does not resize metadata)\n");
MSG(0, " -t target sectors [default: device size]\n");
MSG(0, " -V print the version number and exit\n");
exit(1);
@@ -527,7 +528,7 @@ void f2fs_parse_options(int argc, char *argv[])
#endif
} else if (!strcmp("resize.f2fs", prog)) {
#ifdef WITH_RESIZE
- const char *option_string = "d:fst:iV";
+ const char *option_string = "d:fst:io:V";
c.func = RESIZE;
while ((option = getopt(argc, argv, option_string)) != EOF) {
@@ -561,6 +562,9 @@ void f2fs_parse_options(int argc, char *argv[])
case 'i':
c.large_nat_bitmap = 1;
break;
+ case 'o':
+ c.new_overprovision = atof(optarg);
+ break;
case 'V':
show_version(prog);
exit(0);
diff --git a/fsck/resize.c b/fsck/resize.c
index f1b7701..3d8ea46 100644
--- a/fsck/resize.c
+++ b/fsck/resize.c
@@ -146,7 +146,9 @@ safe_resize:
get_sb(segs_per_sec));
/* Let's determine the best reserved and overprovisioned space */
- c.new_overprovision = get_best_overprovision(sb);
+ if (c.new_overprovision == 0)
+ c.new_overprovision = get_best_overprovision(sb);
+
c.new_reserved_segments =
(2 * (100 / c.new_overprovision + 1) + 6) *
get_sb(segs_per_sec);
@@ -476,6 +478,11 @@ static void rebuild_checkpoint(struct f2fs_sb_info *sbi,
set_cp(overprov_segment_count, get_cp(overprov_segment_count) +
get_cp(rsvd_segment_count));
+ DBG(0, "Info: Overprovision ratio = %.3lf%%\n", c.new_overprovision);
+ DBG(0, "Info: Overprovision segments = %u (GC reserved = %u)\n",
+ get_cp(overprov_segment_count),
+ c.new_reserved_segments);
+
free_segment_count = get_free_segments(sbi);
new_segment_count = get_newsb(segment_count_main) -
get_sb(segment_count_main);
@@ -591,6 +598,26 @@ static void rebuild_checkpoint(struct f2fs_sb_info *sbi,
DBG(0, "Info: Done to rebuild checkpoint blocks\n");
}
+static int f2fs_resize_check(struct f2fs_sb_info *sbi, struct f2fs_super_block *new_sb)
+{
+ struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
+ block_t user_block_count;
+ unsigned int overprov_segment_count;
+
+ overprov_segment_count = (get_newsb(segment_count_main) -
+ c.new_reserved_segments) *
+ c.new_overprovision / 100;
+ overprov_segment_count += c.new_reserved_segments;
+
+ user_block_count = (get_newsb(segment_count_main) -
+ overprov_segment_count) * c.blks_per_seg;
+
+ if (get_cp(valid_block_count) > user_block_count)
+ return -1;
+
+ return 0;
+}
+
static int f2fs_resize_grow(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
@@ -608,6 +635,9 @@ static int f2fs_resize_grow(struct f2fs_sb_info *sbi)
if (get_new_sb(new_sb))
return -1;
+ if (f2fs_resize_check(sbi, new_sb) < 0)
+ return -1;
+
/* check nat availability */
if (get_sb(segment_count_nat) > get_newsb(segment_count_nat)) {
err = shrink_nats(sbi, new_sb);
@@ -651,11 +681,8 @@ static int f2fs_resize_shrink(struct f2fs_sb_info *sbi)
struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
struct f2fs_super_block new_sb_raw;
struct f2fs_super_block *new_sb = &new_sb_raw;
- struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
block_t old_end_blkaddr, old_main_blkaddr;
block_t new_end_blkaddr, new_main_blkaddr, tmp_end_blkaddr;
- block_t user_block_count;
- unsigned int overprov_segment_count;
unsigned int offset;
int err = -1;
@@ -666,15 +693,7 @@ static int f2fs_resize_shrink(struct f2fs_sb_info *sbi)
if (get_new_sb(new_sb))
return -1;
- overprov_segment_count = (get_newsb(segment_count_main) -
- c.new_reserved_segments) *
- c.new_overprovision / 100;
- overprov_segment_count += c.new_reserved_segments;
-
- user_block_count = (get_newsb(segment_count_main) -
- overprov_segment_count) * c.blks_per_seg;
-
- if (get_cp(valid_block_count) > user_block_count)
+ if (f2fs_resize_check(sbi, new_sb) < 0)
return -1;
/* check nat availability */
diff --git a/man/resize.f2fs.8 b/man/resize.f2fs.8
index 463eca5..a4b6cd7 100644
--- a/man/resize.f2fs.8
+++ b/man/resize.f2fs.8
@@ -13,6 +13,10 @@ resize.f2fs \- resize filesystem size
.B \-d
.I debugging-level
]
+[
+.B \-o
+.I overprovision-ratio-percentage
+]
.I device
.SH DESCRIPTION
.B resize.f2fs
@@ -35,6 +39,11 @@ Specify the size in sectors.
Specify the level of debugging options.
The default number is 0, which shows basic debugging messages.
.TP
+.BI \-o " overprovision-ratio-percentage"
+Specify the percentage of the volume that will be used as overprovision area.
+This area is hidden to users, and utilized by F2FS cleaner. If not specified, the
+best number will be assigned automatically according to the partition size.
+.TP
.SH AUTHOR
This version of
.B resize.f2fs
--
2.36.1