[PATCH 05/17] Util: get device size from id

From c0bbe01f5f73d123af899338e838d45df1a4abee Mon Sep 17 00:00:00 2001
From: Anna Czarnowska
Date: Fri, 22 Oct 2010 13:23:15 +0200
Subject: [PATCH 05/17] Util: get device size from id

Signed-off-by: Anna Czarnowska
---
mdadm.h | 1 +
util.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/mdadm.h b/mdadm.h
index 450fb11..66363fb 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -745,6 +745,7 @@ static inline struct supertype *guess_super(int fd) {
}
extern struct supertype *dup_super(struct supertype *st);
extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
+extern int dev_size_from_id(unsigned id, unsigned long long *size);
extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
mdu_disk_info_t *disk);
void wait_for(char *dev, int fd);
diff --git a/util.c b/util.c
index bb85253..e340600 100644
--- a/util.c
+++ b/util.c
@@ -1160,6 +1160,24 @@ int get_dev_size(int fd, char *dname, unsigned long long *sizep)
return 1;
}

+int dev_size_from_id(unsigned id, unsigned long long *size)
+{
+ char *dv;
+ int fd;
+
+ dv = map_dev(major(id), minor(id), 1);
+ if (!dv)
+ return 0;
+ fd = open(dv, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ if (get_dev_size(fd, dv, size)) {
+ close(fd);
+ return 1;
+ }
+ close(fd);
+ return 0;
+}

/* Sets endofpart parameter to the last block used by the last GPT partition on the device.
* Returns: 1 if successful
--
1.6.4.2

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Re: [PATCH 05/17] Util: get device size from id

On 10/29/2010 7:19 AM, Czarnowska, Anna wrote:
> From c0bbe01f5f73d123af899338e838d45df1a4abee Mon Sep 17 00:00:00 2001
> From: Anna Czarnowska
> Date: Fri, 22 Oct 2010 13:23:15 +0200
> Subject: [PATCH 05/17] Util: get device size from id
>
> Signed-off-by: Anna Czarnowska
> ---
> mdadm.h | 1 +
> util.c | 18 ++++++++++++++++++
> 2 files changed, 19 insertions(+), 0 deletions(-)
>
> diff --git a/mdadm.h b/mdadm.h
> index 450fb11..66363fb 100644
> --- a/mdadm.h
> +++ b/mdadm.h
> @@ -745,6 +745,7 @@ static inline struct supertype *guess_super(int fd) {
> }
> extern struct supertype *dup_super(struct supertype *st);
> extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
> +extern int dev_size_from_id(unsigned id, unsigned long long *size);

Small nits:

id should be dev_t.

....and this patch should be squashed into the patch that uses it.
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