The current pending_discard attr just only shows the discard_cmd_cnt
information. More discard status can be shown so that we can check
them through sysfs when needed.
Signed-off-by: Zhiguo Niu <zhiguo....@unisoc.com>
---
changes of v2: Improve the patch according to Chao's suggestions.
---
---
Documentation/ABI/testing/sysfs-fs-f2fs | 6 ++++++
fs/f2fs/sysfs.c | 18 ++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs
b/Documentation/ABI/testing/sysfs-fs-f2fs
index 36c3cb5..c6970e5 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -498,6 +498,12 @@ Description: Show status of f2fs checkpoint in real
time.
CP_RESIZEFS_FLAG 0x00004000
=============================== ==============================
+What: /sys/fs/f2fs/<disk>/stat/discard_status
+Date: November 2023
+Contact: "Zhiguo Niu" <zhiguo....@unisoc.com>
+Description: Show status of f2fs discard in real time, including
+ "issued discard","queued discard" and "undiscard blocks".
+
What: /sys/fs/f2fs/<disk>/ckpt_thread_ioprio
Date: January 2021
Contact: "Daeho Jeong" <daehoje...@google.com>
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 417fae96..2b80116 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -134,6 +134,22 @@ static ssize_t cp_status_show(struct f2fs_attr *a,
return sysfs_emit(buf, "%x\n", le32_to_cpu(F2FS_CKPT(sbi)->ckpt_flags));
}
+static ssize_t discard_status_show(struct f2fs_attr *a,
+ struct f2fs_sb_info *sbi, char *buf)
+{
+ struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
+
+ if (!dcc)
+ return -EINVAL;
+
+ return sysfs_emit(buf, "%llu, %llu, %u\n",
+ (unsigned long long)atomic_read(
+ &dcc->issued_discard),
+ (unsigned long long)atomic_read(
+ &dcc->queued_discard),
+ dcc->undiscard_blks);
+}
+
static ssize_t pending_discard_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
@@ -1197,9 +1213,11 @@ static ssize_t f2fs_sb_feature_show(struct f2fs_attr *a,
F2FS_GENERAL_RO_ATTR(sb_status);
F2FS_GENERAL_RO_ATTR(cp_status);
+F2FS_GENERAL_RO_ATTR(discard_status);
static struct attribute *f2fs_stat_attrs[] = {
ATTR_LIST(sb_status),
ATTR_LIST(cp_status),
+ ATTR_LIST(discard_status),
NULL,
};
ATTRIBUTE_GROUPS(f2fs_stat);
--
1.9.1
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