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imsm: sysfs support routines for determining device connectivity 

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2008-12-08 16:59:18 -07:00
parent b390f61061
commit 25921536da
2 changed files with 64 additions and 0 deletions
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61
platform-intel.c
View File

@ -176,3 +176,64 @@ const struct imsm_orom *find_imsm_orom(void)
return &imsm_orom;
return NULL;
}
char *devt_to_devpath(dev_t dev)
{
char device[40];
sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
return canonicalize_file_name(device);
}
static char *diskfd_to_devpath(int fd)
{
/* return the device path for a disk, return NULL on error or fd
* refers to a partition
*/
struct stat st;
if (fstat(fd, &st) != 0)
return NULL;
if (!S_ISBLK(st.st_mode))
return NULL;
return devt_to_devpath(st.st_rdev);
}
int path_attached_to_hba(const char *disk_path, const char *hba_path)
{
int rc;
if (!disk_path || !hba_path)
return 0;
if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0)
rc = 1;
else
rc = 0;
return rc;
}
int devt_attached_to_hba(dev_t dev, const char *hba_path)
{
char *disk_path = devt_to_devpath(dev);
int rc = path_attached_to_hba(disk_path, hba_path);
if (disk_path)
free(disk_path);
return rc;
}
int disk_attached_to_hba(int fd, const char *hba_path)
{
char *disk_path = diskfd_to_devpath(fd);
int rc = path_attached_to_hba(disk_path, hba_path);
if (disk_path)
free(disk_path);
return rc;
}

3
platform-intel.h
View File

@ -87,3 +87,6 @@ struct sys_dev *find_driver_devices(const char *bus, const char *driver);
__u16 devpath_to_vendor(const char *dev_path);
void free_sys_dev(struct sys_dev **list);
const struct imsm_orom *find_imsm_orom(void);
int disk_attached_to_hba(int fd, const char *hba_path);
char *devt_to_devpath(dev_t dev);
int path_attached_to_hba(const char *disk_path, const char *hba_path);