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From 8cc56e8b3269305ec5483527d853464eac3bf690 Mon Sep 17 00:00:00 2001
From: Zhilong Liu <zlliu@suse.com>
Date: Mon, 28 Aug 2017 17:24:27 +0800
Subject: [RHEL7.5 PATCH 04/13] mdadm/bitmap: examine-bitmap failed when bitmap
is external mode
--examine-bitmap: the bitmap_file_open() shouldn't omit the
regular file descriptor when the bitmap is external mode.
Such as: ./mdadm -X /mnt/3
This commit is partial revert of commit 0a6bff09d416
(mdadm/util: unify fstat checking blkdev into function)
Signed-off-by: Zhilong Liu <zlliu@suse.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
bitmap.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/bitmap.c b/bitmap.c
index 3653660..e38cb96 100644
--- a/bitmap.c
+++ b/bitmap.c
@@ -183,6 +183,7 @@ static int
bitmap_file_open(char *filename, struct supertype **stp, int node_num)
{
int fd;
+ struct stat stb;
struct supertype *st = *stp;
fd = open(filename, O_RDONLY|O_DIRECT);
@@ -192,7 +193,12 @@ bitmap_file_open(char *filename, struct supertype **stp, int node_num)
return -1;
}
- if (fstat_is_blkdev(fd, filename, NULL)) {
+ if (fstat(fd, &stb) < 0) {
+ pr_err("fstat failed for %s: %s\n", filename, strerror(errno));
+ close(fd);
+ return -1;
+ }
+ if ((stb.st_mode & S_IFMT) == S_IFBLK) {
/* block device, so we are probably after an internal bitmap */
if (!st)
st = guess_super(fd);
@@ -211,11 +217,7 @@ bitmap_file_open(char *filename, struct supertype **stp, int node_num)
fd = -1;
}
}
-
*stp = st;
- } else {
- close(fd);
- return -1;
}
return fd;
--
2.7.4