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| author | Nao Nishijima <nao.nishijima.xt@hitachi.com> | 2011-08-25 18:04:06 +0900 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-08-29 00:16:19 -0700 |
| commit | a72c5e5eb738033938ab30d6a634b74d1d060f10 (patch) | |
| tree | 72cea6d75a62f7003d55f8a754c2d17149ada85f /include/linux/genhd.h | |
| parent | 76e4e12ff2b3ef86773989fd897b194eb38016e6 (diff) | |
| download | lwn-a72c5e5eb738033938ab30d6a634b74d1d060f10.tar.gz lwn-a72c5e5eb738033938ab30d6a634b74d1d060f10.zip | |
[SCSI] genhd: add a new attribute "alias" in gendisk
This patch allows the user to set an "alias" of the disk via sysfs interface.
This patch only adds a new attribute "alias" in gendisk structure.
To show the alias instead of the device name in kernel messages,
we need to revise printk messages and use alias_name() in them.
Example:
(current) printk("disk name is %s\n", disk->disk_name);
(new) printk("disk name is %s\n", alias_name(disk));
Users can use alphabets, numbers, '-' and '_' in "alias" attribute. A disk can
have an "alias" which length is up to 255 bytes. This attribute is write-once.
Suggested-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Suggested-by: Jon Masters <jcm@redhat.com>
Signed-off-by: Nao Nishijima <nao.nishijima.xt@hitachi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/linux/genhd.h')
| -rw-r--r-- | include/linux/genhd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 02fa4697a0e5..6957350e122f 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -21,6 +21,8 @@ #define dev_to_part(device) container_of((device), struct hd_struct, __dev) #define disk_to_dev(disk) (&(disk)->part0.__dev) #define part_to_dev(part) (&((part)->__dev)) +#define alias_name(disk) ((disk)->alias ? (disk)->alias : \ + (disk)->disk_name) extern struct device_type part_type; extern struct kobject *block_depr; @@ -58,6 +60,7 @@ enum { #define DISK_MAX_PARTS 256 #define DISK_NAME_LEN 32 +#define ALIAS_LEN 256 #include <linux/major.h> #include <linux/device.h> @@ -162,6 +165,7 @@ struct gendisk { * disks that can't be partitioned. */ char disk_name[DISK_NAME_LEN]; /* name of major driver */ + char *alias; /* alias name of disk */ char *(*devnode)(struct gendisk *gd, mode_t *mode); unsigned int events; /* supported events */ |