f2fs: export ipu policy in debugfs

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@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 32af4f0c573572a5be6cf8f00a25228b08fad068..ff5995cb9560393441c4031f3f70c136c4e2c610 100644 (file)
--- 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 8ee5e5db9287c99a46e53f5c00057508d5a633e6..92c8be00d3967f8e5dc35eac904ed9dfd95b43d2 100644 (file)
--- 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,