linux-kernel - [PATCH v3 5/9] loop: Remove figure_loop

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 27 Apr 2020 09:42:18 +0200
From:   Martijn Coenen <maco@...roid.com>
To:     axboe@...nel.dk, hch@....de, ming.lei@...hat.com
Cc:     narayan@...gle.com, zezeozue@...gle.com, kernel-team@...roid.com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        maco@...gle.com, bvanassche@....org, Chaitanya.Kulkarni@....com,
        jaegeuk@...nel.org, Martijn Coenen <maco@...roid.com>
Subject: [PATCH v3 5/9] loop: Remove figure_loop_size()

This function was now only used by loop_set_capacity(), and updating the
offset and sizelimit is no longer necessary in that case. Just open code
the remaining code in the caller instead.

Signed-off-by: Martijn Coenen <maco@...roid.com>
---
 drivers/block/loop.c | 33 ++++++++++++---------------------
 1 file changed, 12 insertions(+), 21 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index d0f17ee1e29b..d9a1a7e8b192 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -259,26 +259,6 @@ static void loop_set_size(struct loop_device *lo, loff_t size)
 	set_capacity_revalidate_and_notify(lo->lo_disk, size, false);
 }
 
-static int
-figure_loop_size(struct loop_device *lo, loff_t offset, loff_t sizelimit)
-{
-	int err;
-	loff_t size = get_size(offset, sizelimit, lo->lo_backing_file);
-
-	err = loop_validate_size(size);
-	if (err)
-		return err;
-
-	if (lo->lo_offset != offset)
-		lo->lo_offset = offset;
-	if (lo->lo_sizelimit != sizelimit)
-		lo->lo_sizelimit = sizelimit;
-
-	loop_set_size(lo, size);
-
-	return 0;
-}
-
 static inline int
 lo_do_transfer(struct loop_device *lo, int cmd,
 	       struct page *rpage, unsigned roffs,
@@ -1566,10 +1546,21 @@ loop_get_status64(struct loop_device *lo, struct loop_info64 __user *arg) {
 
 static int loop_set_capacity(struct loop_device *lo)
 {
+	int err;
+	loff_t size;
+
 	if (unlikely(lo->lo_state != Lo_bound))
 		return -ENXIO;
 
-	return figure_loop_size(lo, lo->lo_offset, lo->lo_sizelimit);
+	size = get_loop_size(lo, lo->lo_backing_file);
+
+	err = loop_validate_size(size);
+	if (err)
+		return err;
+
+	loop_set_size(lo, size);
+
+	return 0;
 }
 
 static int loop_set_dio(struct loop_device *lo, unsigned long arg)
-- 
2.26.2.303.gf8c07b1a785-goog