9  * This file contains implementation of volume creation, deletion, updating and
46  * A. process 1 opens a sysfs file related to volume Y, say
48  * B. process 2 removes volume Y;
52  * out that the volume was removed from the @ubi->volumes array.
66 	/* Take a reference to prevent volume removal */  in vol_attribute_show()
96 	/* We've done the operation, drop volume and UBI device references */  in vol_attribute_show()
117 /* Release method for volume devices */
155  * ubi_create_volume - create volume.
157  * @req: volume creation request
159  * This function creates volume described by @req. If @req->vol_id id
160  * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
190 		/* Find unused volume ID */  in ubi_create_volume()
191 		dbg_gen("search for vacant volume ID");  in ubi_create_volume()
199 			ubi_err(ubi, "out of volume IDs");  in ubi_create_volume()
206 	dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",  in ubi_create_volume()
210 	/* Ensure that this volume does not exist */  in ubi_create_volume()
213 		ubi_err(ubi, "volume %d already exists", vol_id);  in ubi_create_volume()
222 			ubi_err(ubi, "volume \"%s\" exists (ID %d)",  in ubi_create_volume()
257 	 * to the same volume ID.  in ubi_create_volume()
286 	/* Make volume "available" before it becomes accessible via sysfs */  in ubi_create_volume()
292 	/* Register character device for the volume */  in ubi_create_volume()
304 	/* Fill volume table record */  in ubi_create_volume()
330 	 * We have registered our device, we should not free the volume  in ubi_create_volume()
347 	ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err);  in ubi_create_volume()
352  * ubi_remove_volume - remove volume.
353  * @desc: volume descriptor
354  * @no_vtbl: do not change volume table if not zero
356  * This function removes volume described by @desc. The volume has to be opened
367 	dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);  in ubi_remove_volume()
377 		 * The volume is busy, probably someone is reading one of its  in ubi_remove_volume()
385 	 * Mark volume as dead at this point to prevent that anyone  in ubi_remove_volume()
386 	 * can take a reference to the volume from now on.  in ubi_remove_volume()
428 	ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err);  in ubi_remove_volume()
437  * ubi_resize_volume - re-size volume.
438  * @desc: volume descriptor
441  * This function re-sizes the volume and returns zero in case of success, and a
458 	dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",  in ubi_resize_volume()
526 	 * When we shrink a volume we have to flush all pending (erase) work.  in ubi_resize_volume()
536 	/* Change volume table record */  in ubi_resize_volume()
612  * ubi_add_volume - add volume.
614  * @vol: volume description object
616  * This function adds an existing volume and initializes all its data
625 	dbg_gen("add volume %d", vol_id);  in ubi_add_volume()
627 	/* Register character device for the volume */  in ubi_add_volume()
633 		ubi_err(ubi, "cannot add character device for volume %d, error %d",  in ubi_add_volume()
658  * ubi_free_volume - free volume.
660  * @vol: volume description object
662  * This function frees all resources for volume @vol but does not remove it.
667 	dbg_gen("free volume %d", vol->vol_id);  in ubi_free_volume()
675  * self_check_volume - check volume information.
677  * @vol_id: volume ID
679  * Returns zero if volume is all right and a negative error code if not.
695 			ubi_err(ubi, "no volume info, but volume exists");  in self_check_volume()
747 		ubi_err(ubi, "too long volume name, max is %d",  in self_check_volume()
761 			ubi_err(ubi, "corrupted dynamic volume");  in self_check_volume()
811 		ubi_err(ubi, "volume info is different");  in self_check_volume()
819 	ubi_err(ubi, "self-check failed for volume %d", vol_id);  in self_check_volume()