[PATCH v3 1/2] f2fs: export ipu policy in debugfs
From: Yangtao Li
Date: Mon Feb 13 2023 - 09:18:57 EST
Export ipu_policy as a string in debugfs for better readability and
it can help us better understand some strategies of the file system.
Signed-off-by: Yangtao Li <frank.li@xxxxxxxx>
---
v3:
- remove unnecessary '\n'
fs/f2fs/debug.c | 24 ++++++++++++++++++++++++
fs/f2fs/segment.h | 1 +
2 files changed, 25 insertions(+)
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 32af4f0c5735..ff5995cb9560 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -354,6 +354,17 @@ static char *s_flag[] = {
[SBI_IS_FREEZING] = " freezefs",
};
+static const char *ipu_mode_names[F2FS_IPU_MAX] = {
+ [F2FS_IPU_FORCE] = "FORCE",
+ [F2FS_IPU_SSR] = "SSR",
+ [F2FS_IPU_UTIL] = "UTIL",
+ [F2FS_IPU_SSR_UTIL] = "SSR_UTIL",
+ [F2FS_IPU_FSYNC] = "FSYNC",
+ [F2FS_IPU_ASYNC] = "ASYNC",
+ [F2FS_IPU_NOCACHE] = "NOCACHE",
+ [F2FS_IPU_HONOR_OPU_WRITE] = "HONOR_OPU_WRITE",
+};
+
static int stat_show(struct seq_file *s, void *v)
{
struct f2fs_stat_info *si;
@@ -384,6 +395,19 @@ static int stat_show(struct seq_file *s, void *v)
seq_printf(s, "Current Time Sec: %llu / Mounted Time Sec: %llu\n\n",
ktime_get_boottime_seconds(),
SIT_I(si->sbi)->mounted_time);
+
+ seq_puts(s, "Policy:\n");
+ seq_puts(s, " - IPU: [");
+ if (IS_F2FS_IPU_DISABLE(si->sbi)) {
+ seq_puts(s, " DISABLE");
+ } else {
+ unsigned long policy = SM_I(si->sbi)->ipu_policy;
+
+ for_each_set_bit(j, &policy, F2FS_IPU_MAX)
+ seq_printf(s, " %s", ipu_mode_names[j]);
+ }
+ seq_puts(s, " ]\n\n");
+
if (test_opt(si->sbi, DISCARD))
seq_printf(s, "Utilization: %u%% (%u valid blocks, %u discard blocks)\n",
si->utilization, si->valid_count, si->discard_blks);
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 6003fbaf4b7d..7230d0c6c138 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -672,6 +672,7 @@ static inline int utilization(struct f2fs_sb_info *sbi)
#define F2FS_IPU_DISABLE 0
+/* Modification on enum should be synchronized with ipu_mode_names array */
enum {
F2FS_IPU_FORCE,
F2FS_IPU_SSR,
--
2.25.1