imsm: add generic method to resolve "device" links

Each virtual device is linked with parent by "device". This patch adds
possibility to get previous device in sysfs tree.

Depending on device type, there is a different amount of virutal
layers. The best we can do is allow to directly specify how many
"device" links need to be resolved. This approach also allows to get
previous virtual device, which may contain some attributes.

Simplify fd2devname, this function doesn't require new functionality and
shall use generic fd2kname.

For nvme drives represented via nvme-subystem when path to block
device if requested, then return it without translation.

Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/platform-intel.h b/platform-intel.h
index 8396a0f1..f93add51 100644
--- a/platform-intel.h
+++ b/platform-intel.h
@@ -237,7 +237,7 @@ static inline char *guid_str(char *buf, struct efi_guid guid)
 }
 
 char *get_nvme_multipath_dev_hw_path(const char *dev_path);
-char *diskfd_to_devpath(int fd);
+char *diskfd_to_devpath(int fd, int dev_level, char *buf);
 __u16 devpath_to_vendor(const char *dev_path);
 struct sys_dev *find_driver_devices(const char *bus, const char *driver);
 struct sys_dev *find_intel_devices(void);
@@ -245,7 +245,7 @@ const struct imsm_orom *find_imsm_capability(struct sys_dev *hba);
 const struct imsm_orom *find_imsm_orom(void);
 int disk_attached_to_hba(int fd, const char *hba_path);
 int devt_attached_to_hba(dev_t dev, const char *hba_path);
-char *devt_to_devpath(dev_t dev);
+char *devt_to_devpath(dev_t dev, int dev_level, char *buf);
 int path_attached_to_hba(const char *disk_path, const char *hba_path);
 const char *get_sys_dev_type(enum sys_dev_type);
 const struct orom_entry *get_orom_entry_by_device_id(__u16 dev_id);