External bitmap supports to store bitmap in a regular file,
bitmap_file_open() also supports to return the regular file
descriptor.
This commit is partial revert of commit 0a6bff09d416
(mdadm/util: unify fstat checking blkdev into function)
Signed-off-by: Zhilong Liu <redacted>
---
bitmap.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/bitmap.c b/bitmap.c
index 3653660..989cfb1 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);@@ -191,8 +192,13 @@ bitmap_file_open(char *filename, struct supertype **stp, int node_num)
filename, strerror(errno));
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;--
2.6.6