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From: Coly Li <colyli@suse.de>
To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
	linux-raid@vger.kernel.org, nvdimm@lists.linux.dev
Cc: antlists@youngman.org.uk, Coly Li <colyli@suse.de>,
	Dan Williams <dan.j.williams@intel.com>,
	Hannes Reinecke <hare@suse.de>, Jens Axboe <axboe@kernel.dk>,
	NeilBrown <neilb@suse.de>, Richard Fan <richard.fan@suse.com>,
	Vishal L Verma <vishal.l.verma@intel.com>
Subject: [PATCH v3 1/6] badblocks: add more helper structure and routines in badblocks.h
Date: Tue, 14 Sep 2021 00:36:37 +0800	[thread overview]
Message-ID: <20210913163643.10233-2-colyli@suse.de> (raw)
In-Reply-To: <20210913163643.10233-1-colyli@suse.de>

This patch adds the following helper structure and routines into
badblocks.h,
- struct badblocks_context
  This structure is used in improved badblocks code for bad table
  iteration.
- BB_END()
  The macro to culculate end LBA of a bad range record from bad
  table.
- badblocks_full() and badblocks_empty()
  The inline routines to check whether bad table is full or empty.
- set_changed() and clear_changed()
  The inline routines to set and clear 'changed' tag from struct
  badblocks.

These new helper structure and routines can help to make the code more
clear, they will be used in the improved badblocks code in following
patches.

Signed-off-by: Coly Li <colyli@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: NeilBrown <neilb@suse.de>
Cc: Richard Fan <richard.fan@suse.com>
Cc: Vishal L Verma <vishal.l.verma@intel.com>
---
 include/linux/badblocks.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/include/linux/badblocks.h b/include/linux/badblocks.h
index 2426276b9bd3..166161842d1f 100644
--- a/include/linux/badblocks.h
+++ b/include/linux/badblocks.h
@@ -15,6 +15,7 @@
 #define BB_OFFSET(x)	(((x) & BB_OFFSET_MASK) >> 9)
 #define BB_LEN(x)	(((x) & BB_LEN_MASK) + 1)
 #define BB_ACK(x)	(!!((x) & BB_ACK_MASK))
+#define BB_END(x)	(BB_OFFSET(x) + BB_LEN(x))
 #define BB_MAKE(a, l, ack) (((a)<<9) | ((l)-1) | ((u64)(!!(ack)) << 63))
 
 /* Bad block numbers are stored sorted in a single page.
@@ -41,6 +42,14 @@ struct badblocks {
 	sector_t size;		/* in sectors */
 };
 
+struct badblocks_context {
+	sector_t	start;
+	sector_t	len;
+	int		ack;
+	sector_t	orig_start;
+	sector_t	orig_len;
+};
+
 int badblocks_check(struct badblocks *bb, sector_t s, int sectors,
 		   sector_t *first_bad, int *bad_sectors);
 int badblocks_set(struct badblocks *bb, sector_t s, int sectors,
@@ -63,4 +72,27 @@ static inline void devm_exit_badblocks(struct device *dev, struct badblocks *bb)
 	}
 	badblocks_exit(bb);
 }
+
+static inline int badblocks_full(struct badblocks *bb)
+{
+	return (bb->count >= MAX_BADBLOCKS);
+}
+
+static inline int badblocks_empty(struct badblocks *bb)
+{
+	return (bb->count == 0);
+}
+
+static inline void set_changed(struct badblocks *bb)
+{
+	if (bb->changed != 1)
+		bb->changed = 1;
+}
+
+static inline void clear_changed(struct badblocks *bb)
+{
+	if (bb->changed != 0)
+		bb->changed = 0;
+}
+
 #endif
-- 
2.31.1


  reply	other threads:[~2021-09-13 16:38 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-13 16:36 [PATCH v3 0/7] badblocks improvement for multiple bad block ranges Coly Li
2021-09-13 16:36 ` Coly Li [this message]
2021-09-27  7:23   ` [PATCH v3 1/6] badblocks: add more helper structure and routines in badblocks.h Geliang Tang
2021-09-27  8:23     ` Coly Li
2021-09-13 16:36 ` [PATCH v3 2/6] badblocks: add helper routines for badblock ranges handling Coly Li
2021-09-27  7:25   ` Geliang Tang
2021-09-27  8:17     ` Coly Li
2021-09-13 16:36 ` [PATCH v3 3/6] badblocks: improvement badblocks_set() for multiple " Coly Li
2021-09-27  7:30   ` Geliang Tang
2021-09-27  8:16     ` Coly Li
2021-09-13 16:36 ` [PATCH v3 4/6] badblocks: improve badblocks_clear() " Coly Li
2021-09-13 16:36 ` [PATCH v3 5/6] badblocks: improve badblocks_check() " Coly Li
2021-09-13 16:36 ` [PATCH v3 6/6] badblocks: switch to the improved badblock handling code Coly Li
2021-09-13 16:36 ` [PATCH] test: user space code to test badblocks APIs Coly Li
2021-09-23  5:59 ` Too large badblocks sysfs file (was: [PATCH v3 0/7] badblocks improvement for multiple bad block ranges) Coly Li
2021-09-23  6:08   ` Greg Kroah-Hartman
2021-09-23  6:14     ` Coly Li
2021-09-23  6:47       ` Greg Kroah-Hartman
2021-09-23  7:13         ` Coly Li
2021-09-23  9:40   ` Hannes Reinecke
2021-09-23  9:57     ` Greg Kroah-Hartman
2021-09-23 10:09   ` NeilBrown
2021-09-23 10:39     ` Greg Kroah-Hartman
2021-09-23 12:55     ` Coly Li

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