[PATCH 0/3] mdadm: minor fixes

[PATCH 0/3] mdadm: minor fixes

[Xiao Ni]

There are some building errors and regression bug.
The PR is at https://github.com/md-raid-utilities/mdadm/pull/178

Xiao Ni (3):
  mdadm: use standard libc nftw
  mdadm: fix building errors
  mdadm: add attribute nonstring for signature

 lib.c            | 22 ----------------------
 platform-intel.h |  2 +-
 super-ddf.c      |  9 +++++----
 super-intel.c    |  3 ++-
 4 files changed, 8 insertions(+), 28 deletions(-)

-- 
2.32.0 (Apple Git-132)

[PATCH 1/3] mdadm: use standard libc nftw

[Xiao Ni]

commit bd648e3bec3d ("mdadm: Remove klibc and uclibc support") removes
macro HAVE_NFTW/HAVE_FTW and uses libc header ftw.h. But it leaves the
codes in lib.c which let mdadm command call nftw defined in lib.c. It
needs to remove these codes.

The bug can be reproduced by:
mdadm -CR /dev/md0 --level raid5 --metadata=1.1 --chunk=32 --raid-disks 3
--size 10000 /dev/loop1 /dev/loop2 /dev/loop3
mdadm /dev/md0 --grow --chunk=64
mdadm: /dev/md0: cannot open component -unknown-

Fixes: bd648e3bec3d ("mdadm: Remove klibc and uclibc support")
Signed-off-by: Xiao Ni <xni@redhat.com>
---
 lib.c | 22 ----------------------
 1 file changed, 22 deletions(-)

diff --git a/lib.c b/lib.c
index f36ae03a3fa0..eb6cc1194cab 100644
--- a/lib.c
+++ b/lib.c
@@ -245,28 +245,6 @@ int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s)
 	return 0;
 }
 
-#ifndef HAVE_NFTW
-#ifdef HAVE_FTW
-int add_dev_1(const char *name, const struct stat *stb, int flag)
-{
-	return add_dev(name, stb, flag, NULL);
-}
-int nftw(const char *path,
-	 int (*han)(const char *name, const struct stat *stb,
-		    int flag, struct FTW *s), int nopenfd, int flags)
-{
-	return ftw(path, add_dev_1, nopenfd);
-}
-#else
-int nftw(const char *path,
-	 int (*han)(const char *name, const struct stat *stb,
-		    int flag, struct FTW *s), int nopenfd, int flags)
-{
-	return 0;
-}
-#endif /* HAVE_FTW */
-#endif /* HAVE_NFTW */
-
 /*
  * Find a block device with the right major/minor number.
  * If we find multiple names, choose the shortest.
-- 
2.32.0 (Apple Git-132)

[PATCH 2/3] mdadm: fix building errors

[Xiao Ni]

Some building errors are found in ppc64le platform:
format '%llu' expects argument of type 'long long unsigned int', but
argument 3 has type 'long unsigned int' [-Werror=format=]

Signed-off-by: Xiao Ni <xni@redhat.com>
---
 super-ddf.c   | 9 +++++----
 super-intel.c | 3 ++-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/super-ddf.c b/super-ddf.c
index 6e7db924d2b1..dda8b7fedd64 100644
--- a/super-ddf.c
+++ b/super-ddf.c
@@ -1606,9 +1606,9 @@ static void examine_vd(int n, struct ddf_super *sb, char *guid)
 			       map_num(ddf_sec_level, vc->srl) ?: "-unknown-");
 		}
 		printf("  Device Size[%d] : %llu\n", n,
-		       be64_to_cpu(vc->blocks)/2);
+		       (unsigned long long)(be64_to_cpu(vc->blocks)/2));
 		printf("   Array Size[%d] : %llu\n", n,
-		       be64_to_cpu(vc->array_blocks)/2);
+		       (unsigned long long)(be64_to_cpu(vc->array_blocks)/2));
 	}
 }
 
@@ -1665,7 +1665,7 @@ static void examine_pds(struct ddf_super *sb)
 		printf("       %3d    %08x  ", i,
 		       be32_to_cpu(pd->refnum));
 		printf("%8lluK ",
-		       be64_to_cpu(pd->config_size)>>1);
+				(unsigned long long)be64_to_cpu(pd->config_size)>>1);
 		for (dl = sb->dlist; dl ; dl = dl->next) {
 			if (be32_eq(dl->disk.refnum, pd->refnum)) {
 				char *dv = map_dev(dl->major, dl->minor, 0);
@@ -2901,7 +2901,8 @@ static unsigned int find_unused_pde(const struct ddf_super *ddf)
 static void _set_config_size(struct phys_disk_entry *pde, const struct dl *dl)
 {
 	__u64 cfs, t;
-	cfs = min(dl->size - 32*1024*2ULL, be64_to_cpu(dl->primary_lba));
+	cfs = min((unsigned long long)dl->size - 32*1024*2ULL,
+			(unsigned long long)(be64_to_cpu(dl->primary_lba)));
 	t = be64_to_cpu(dl->secondary_lba);
 	if (t != ~(__u64)0)
 		cfs = min(cfs, t);
diff --git a/super-intel.c b/super-intel.c
index b7b030a20432..4fbbc98d915c 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -2325,7 +2325,8 @@ static void export_examine_super_imsm(struct supertype *st)
 	printf("MD_LEVEL=container\n");
 	printf("MD_UUID=%s\n", nbuf+5);
 	printf("MD_DEVICES=%u\n", mpb->num_disks);
-	printf("MD_CREATION_TIME=%llu\n", __le64_to_cpu(mpb->creation_time));
+	printf("MD_CREATION_TIME=%llu\n",
+			(unsigned long long)__le64_to_cpu(mpb->creation_time));
 }
 
 static void detail_super_imsm(struct supertype *st, char *homehost,
-- 
2.32.0 (Apple Git-132)

[PATCH 3/3] mdadm: add attribute nonstring for signature

[Xiao Ni]

It reports building error in f42:
error: initializer-string for array of ‘unsigned char’ truncates NULL
terminator but destination lacks ‘nonstring’ attribute (5 chars into 4
available) [-Werror=unterminated-string-initialization]

Signed-off-by: Xiao Ni <xni@redhat.com>
---
 platform-intel.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform-intel.h b/platform-intel.h
index 63d416826118..f92a9a11c3a0 100644
--- a/platform-intel.h
+++ b/platform-intel.h
@@ -24,7 +24,7 @@
 
 /* The IMSM Capability (IMSM AHCI and ISCU OROM/EFI variable) Version Table definition */
 struct imsm_orom {
-	__u8 signature[4];
+	__u8 signature[4] __attribute__((nonstring));
 	#define IMSM_OROM_SIGNATURE "$VER"
 	#define IMSM_NVME_OROM_COMPAT_SIGNATURE "$NVM"
 	#define IMSM_VMD_OROM_COMPAT_SIGNATURE "$VMD"
-- 
2.32.0 (Apple Git-132)

Re: [PATCH 2/3] mdadm: fix building errors

[Paul Menzel]

Dear Xiao,


Thank you for your patch. Could you make the summary/title more 
specific? Something like Cast …?


Am 07.05.25 um 14:20 schrieb Xiao Ni:
> Some building errors are found in ppc64le platform:
> format '%llu' expects argument of type 'long long unsigned int', but
> argument 3 has type 'long unsigned int' [-Werror=format=]

I’d put pasted things in one line.

Also, please state how you fixed this.

> Signed-off-by: Xiao Ni <xni@redhat.com>
> ---
>   super-ddf.c   | 9 +++++----
>   super-intel.c | 3 ++-
>   2 files changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/super-ddf.c b/super-ddf.c
> index 6e7db924d2b1..dda8b7fedd64 100644
> --- a/super-ddf.c
> +++ b/super-ddf.c
> @@ -1606,9 +1606,9 @@ static void examine_vd(int n, struct ddf_super *sb, char *guid)
>   			       map_num(ddf_sec_level, vc->srl) ?: "-unknown-");
>   		}
>   		printf("  Device Size[%d] : %llu\n", n,
> -		       be64_to_cpu(vc->blocks)/2);
> +		       (unsigned long long)(be64_to_cpu(vc->blocks)/2));
>   		printf("   Array Size[%d] : %llu\n", n,
> -		       be64_to_cpu(vc->array_blocks)/2);
> +		       (unsigned long long)(be64_to_cpu(vc->array_blocks)/2));
>   	}
>   }
>   
> @@ -1665,7 +1665,7 @@ static void examine_pds(struct ddf_super *sb)
>   		printf("       %3d    %08x  ", i,
>   		       be32_to_cpu(pd->refnum));
>   		printf("%8lluK ",
> -		       be64_to_cpu(pd->config_size)>>1);
> +				(unsigned long long)be64_to_cpu(pd->config_size)>>1);

Keep the alignement from before?

>   		for (dl = sb->dlist; dl ; dl = dl->next) {
>   			if (be32_eq(dl->disk.refnum, pd->refnum)) {
>   				char *dv = map_dev(dl->major, dl->minor, 0);
> @@ -2901,7 +2901,8 @@ static unsigned int find_unused_pde(const struct ddf_super *ddf)
>   static void _set_config_size(struct phys_disk_entry *pde, const struct dl *dl)
>   {
>   	__u64 cfs, t;
> -	cfs = min(dl->size - 32*1024*2ULL, be64_to_cpu(dl->primary_lba));
> +	cfs = min((unsigned long long)dl->size - 32*1024*2ULL,
> +			(unsigned long long)(be64_to_cpu(dl->primary_lba)));
>   	t = be64_to_cpu(dl->secondary_lba);
>   	if (t != ~(__u64)0)
>   		cfs = min(cfs, t);
> diff --git a/super-intel.c b/super-intel.c
> index b7b030a20432..4fbbc98d915c 100644
> --- a/super-intel.c
> +++ b/super-intel.c
> @@ -2325,7 +2325,8 @@ static void export_examine_super_imsm(struct supertype *st)
>   	printf("MD_LEVEL=container\n");
>   	printf("MD_UUID=%s\n", nbuf+5);
>   	printf("MD_DEVICES=%u\n", mpb->num_disks);
> -	printf("MD_CREATION_TIME=%llu\n", __le64_to_cpu(mpb->creation_time));
> +	printf("MD_CREATION_TIME=%llu\n",
> +			(unsigned long long)__le64_to_cpu(mpb->creation_time));
>   }
>   
>   static void detail_super_imsm(struct supertype *st, char *homehost,

Can’t this be fixed in the header?


Kind regards,

Paul

Re: [PATCH 2/3] mdadm: fix building errors

[Xiao Ni]

On Wed, May 7, 2025 at 9:53 PM Paul Menzel <pmenzel@molgen.mpg.de> wrote:
>
> Dear Xiao,
>
>
> Thank you for your patch. Could you make the summary/title more
> specific? Something like Cast …?

How about 'Cast be64_to_cpu to unsigned long long'? Or any good suggestion?
>
>
> Am 07.05.25 um 14:20 schrieb Xiao Ni:
> > Some building errors are found in ppc64le platform:
> > format '%llu' expects argument of type 'long long unsigned int', but
> > argument 3 has type 'long unsigned int' [-Werror=format=]
>
> I’d put pasted things in one line.

There is a 75 character number limit for each line in commit.
>
> Also, please state how you fixed this.

Ok, but it's easy to see from the patch. It just do a cast with
(unsigned long long)
>
> > Signed-off-by: Xiao Ni <xni@redhat.com>
> > ---
> >   super-ddf.c   | 9 +++++----
> >   super-intel.c | 3 ++-
> >   2 files changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git a/super-ddf.c b/super-ddf.c
> > index 6e7db924d2b1..dda8b7fedd64 100644
> > --- a/super-ddf.c
> > +++ b/super-ddf.c
> > @@ -1606,9 +1606,9 @@ static void examine_vd(int n, struct ddf_super *sb, char *guid)
> >                              map_num(ddf_sec_level, vc->srl) ?: "-unknown-");
> >               }
> >               printf("  Device Size[%d] : %llu\n", n,
> > -                    be64_to_cpu(vc->blocks)/2);
> > +                    (unsigned long long)(be64_to_cpu(vc->blocks)/2));
> >               printf("   Array Size[%d] : %llu\n", n,
> > -                    be64_to_cpu(vc->array_blocks)/2);
> > +                    (unsigned long long)(be64_to_cpu(vc->array_blocks)/2));
> >       }
> >   }
> >
> > @@ -1665,7 +1665,7 @@ static void examine_pds(struct ddf_super *sb)
> >               printf("       %3d    %08x  ", i,
> >                      be32_to_cpu(pd->refnum));
> >               printf("%8lluK ",
> > -                    be64_to_cpu(pd->config_size)>>1);
> > +                             (unsigned long long)be64_to_cpu(pd->config_size)>>1);
>
> Keep the alignement from before?

We usually use tab rather than spaces. So it's better to use tab here.
But I don't want to fix all the alignments problem.

>
> >               for (dl = sb->dlist; dl ; dl = dl->next) {
> >                       if (be32_eq(dl->disk.refnum, pd->refnum)) {
> >                               char *dv = map_dev(dl->major, dl->minor, 0);
> > @@ -2901,7 +2901,8 @@ static unsigned int find_unused_pde(const struct ddf_super *ddf)
> >   static void _set_config_size(struct phys_disk_entry *pde, const struct dl *dl)
> >   {
> >       __u64 cfs, t;
> > -     cfs = min(dl->size - 32*1024*2ULL, be64_to_cpu(dl->primary_lba));
> > +     cfs = min((unsigned long long)dl->size - 32*1024*2ULL,
> > +                     (unsigned long long)(be64_to_cpu(dl->primary_lba)));
> >       t = be64_to_cpu(dl->secondary_lba);
> >       if (t != ~(__u64)0)
> >               cfs = min(cfs, t);
> > diff --git a/super-intel.c b/super-intel.c
> > index b7b030a20432..4fbbc98d915c 100644
> > --- a/super-intel.c
> > +++ b/super-intel.c
> > @@ -2325,7 +2325,8 @@ static void export_examine_super_imsm(struct supertype *st)
> >       printf("MD_LEVEL=container\n");
> >       printf("MD_UUID=%s\n", nbuf+5);
> >       printf("MD_DEVICES=%u\n", mpb->num_disks);
> > -     printf("MD_CREATION_TIME=%llu\n", __le64_to_cpu(mpb->creation_time));
> > +     printf("MD_CREATION_TIME=%llu\n",
> > +                     (unsigned long long)__le64_to_cpu(mpb->creation_time));
> >   }
> >
> >   static void detail_super_imsm(struct supertype *st, char *homehost,
>
> Can’t this be fixed in the header?

I don't follow you here.

Best Regards
Xiao
>
>
> Kind regards,
>
> Paul
>