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 */
128  * ubi_create_volume - create volume.
130  * @req: volume creation request
132  * This function creates volume described by @req. If @req->vol_id id
133  * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume
163 		/* Find unused volume ID */  in ubi_create_volume()
164 		dbg_gen("search for vacant volume ID");  in ubi_create_volume()
172 			ubi_err(ubi, "out of volume IDs");  in ubi_create_volume()
179 	dbg_gen("create device %d, volume %d, %llu bytes, type %d, name %s",  in ubi_create_volume()
183 	/* Ensure that this volume does not exist */  in ubi_create_volume()
186 		ubi_err(ubi, "volume %d already exists", vol_id);  in ubi_create_volume()
195 			ubi_err(ubi, "volume \"%s\" exists (ID %d)",  in ubi_create_volume()
229 	 * to the same volume ID.  in ubi_create_volume()
258 	/* Make volume "available" before it becomes accessible via sysfs */  in ubi_create_volume()
264 	/* Register character device for the volume */  in ubi_create_volume()
276 	/* Fill volume table record */  in ubi_create_volume()
302 	 * We have registered our device, we should not free the volume  in ubi_create_volume()
319 	ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err);  in ubi_create_volume()
324  * ubi_remove_volume - remove volume.
325  * @desc: volume descriptor
326  * @no_vtbl: do not change volume table if not zero
328  * This function removes volume described by @desc. The volume has to be opened
339 	dbg_gen("remove device %d, volume %d", ubi->ubi_num, vol_id);  in ubi_remove_volume()
349 		 * The volume is busy, probably someone is reading one of its  in ubi_remove_volume()
387 	ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err);  in ubi_remove_volume()
396  * ubi_resize_volume - re-size volume.
397  * @desc: volume descriptor
400  * This function re-sizes the volume and returns zero in case of success, and a
416 	dbg_gen("re-size device %d, volume %d to from %d to %d PEBs",  in ubi_resize_volume()
479 	 * When we shrink a volume we have to flush all pending (erase) work.  in ubi_resize_volume()
489 	/* Change volume table record */  in ubi_resize_volume()
562  * ubi_add_volume - add volume.
564  * @vol: volume description object
566  * This function adds an existing volume and initializes all its data
575 	dbg_gen("add volume %d", vol_id);  in ubi_add_volume()
577 	/* Register character device for the volume */  in ubi_add_volume()
583 		ubi_err(ubi, "cannot add character device for volume %d, error %d",  in ubi_add_volume()
607  * ubi_free_volume - free volume.
609  * @vol: volume description object
611  * This function frees all resources for volume @vol but does not remove it.
616 	dbg_gen("free volume %d", vol->vol_id);  in ubi_free_volume()
624  * self_check_volume - check volume information.
626  * @vol_id: volume ID
628  * Returns zero if volume is all right and a negative error code if not.
644 			ubi_err(ubi, "no volume info, but volume exists");  in self_check_volume()
696 		ubi_err(ubi, "too long volume name, max is %d",  in self_check_volume()
710 			ubi_err(ubi, "corrupted dynamic volume");  in self_check_volume()
760 		ubi_err(ubi, "volume info is different");  in self_check_volume()
768 	ubi_err(ubi, "self-check failed for volume %d", vol_id);  in self_check_volume()