f2fs: add discard info to sys entry of f2fs status

This patch add discard block count to sys entry of f2fs status

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

2 files changed, 14 insertions, 3 deletions

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index af69d6bcfc3f..ae13521381f7 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -54,6 +54,7 @@ static void update_general_status(struct f2fs_sb_info *sbi)
         si->rsvd_segs = reserved_segments(sbi);
         si->overp_segs = overprovision_segments(sbi);
         si->valid_count = valid_user_blocks(sbi);
+        si->discard_blks = discard_blocks(sbi);
         si->valid_node_count = valid_node_count(sbi);
         si->valid_inode_count = valid_inode_count(sbi);
         si->inline_xattr = atomic_read(&sbi->inline_xattr);
@@ -230,8 +231,13 @@ static int stat_show(struct seq_file *s, void *v)
                            si->ssa_area_segs, si->main_area_segs);
                 seq_printf(s, "(OverProv:%d Resv:%d)]\n\n",
                            si->overp_segs, si->rsvd_segs);
-                seq_printf(s, "Utilization: %d%% (%d valid blocks)\n",
-                           si->utilization, si->valid_count);
+                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);
+                else
+                        seq_printf(s, "Utilization: %u%% (%u valid blocks)\n",
+                                si->utilization, si->valid_count);
+
                 seq_printf(s, "  - Node: %u (Inode: %u, ",
                            si->valid_node_count, si->valid_inode_count);
                 seq_printf(s, "Other: %u)\n  - Data: %u\n",
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 59eed3ec35c7..0f4599099dbc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1250,6 +1250,11 @@ static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi)
         return sbi->total_valid_block_count;
 }
 
+static inline block_t discard_blocks(struct f2fs_sb_info *sbi)
+{
+        return sbi->discard_blks;
+}
+
 static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
 {
         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
@@ -2136,7 +2141,7 @@ struct f2fs_stat_info {
         int total_count, utilization;
         int bg_gc, wb_bios;
         int inline_xattr, inline_inode, inline_dir, orphans;
-        unsigned int valid_count, valid_node_count, valid_inode_count;
+        unsigned int valid_count, valid_node_count, valid_inode_count, discard_blks;
         unsigned int bimodal, avg_vblocks;
         int util_free, util_valid, util_invalid;
         int rsvd_segs, overp_segs;