Merge tag 'ubifs-for-linus-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs

Pull jffs2, ubi and ubifs updates from Richard Weinberger:
"JFFS2:
- Fix memory corruption in error path
- Spelling and coding style fixes

UBI:
- Switch to BLK_MQ_F_BLOCKING in ubiblock
- Wire up partent device (for sysfs)
- Multiple UAF bugfixes
- Fix for an infinite loop in WL error path

UBIFS:
- Fix for multiple memory leaks in error paths
- Fixes for wrong space accounting
- Minor cleanups
- Spelling and coding style fixes"

* tag 'ubifs-for-linus-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: (36 commits)
ubi: block: Fix a possible use-after-free bug in ubiblock_create()
ubifs: make kobj_type structures constant
mtd: ubi: block: wire-up device parent
mtd: ubi: wire-up parent MTD device
ubi: use correct names in function kernel-doc comments
ubi: block: set BLK_MQ_F_BLOCKING
jffs2: Fix list_del corruption if compressors initialized failed
jffs2: Use function instead of macro when initialize compressors
jffs2: fix spelling mistake "neccecary"->"necessary"
ubifs: Fix kernel-doc
ubifs: Fix some kernel-doc comments
UBI: Fastmap: Fix kernel-doc
ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed
ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()
ubi: fastmap: Fix missed fm_anchor PEB in wear-leveling after disabling fastmap
ubifs: ubifs_releasepage: Remove ubifs_assert(0) to valid this process
ubifs: ubifs_writepage: Mark page dirty after writing inode failed
ubifs: dirty_cow_znode: Fix memleak in error handling path
ubifs: Re-statistic cleaned znode count if commit failed
ubi: Fix permission display of the debugfs files
...

drivers/mtd/ubi/block.c

···
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/mtd/ubi.h>
-#include <linux/workqueue.h>
 #include <linux/blkdev.h>
 #include <linux/blk-mq.h>
 #include <linux/hdreg.h>
···
 };
 
 struct ubiblock_pdu {
-	struct work_struct work;
 	struct ubi_sgl usgl;
 };
 
···
 
 	struct gendisk *gd;
 	struct request_queue *rq;
-
-	struct workqueue_struct *wq;
 
 	struct mutex dev_mutex;
 	struct list_head list;
···
 	return NULL;
 }
 
-static int ubiblock_read(struct ubiblock_pdu *pdu)
+static blk_status_t ubiblock_read(struct request *req)
 {
-	int ret, leb, offset, bytes_left, to_read;
-	u64 pos;
-	struct request *req = blk_mq_rq_from_pdu(pdu);
+	struct ubiblock_pdu *pdu = blk_mq_rq_to_pdu(req);
 	struct ubiblock *dev = req->q->queuedata;
-
-	to_read = blk_rq_bytes(req);
-	pos = blk_rq_pos(req) << 9;
-
+	u64 pos = blk_rq_pos(req) << 9;
+	int to_read = blk_rq_bytes(req);
+	int bytes_left = to_read;
 	/* Get LEB:offset address to read from */
-	offset = do_div(pos, dev->leb_size);
-	leb = pos;
-	bytes_left = to_read;
+	int offset = do_div(pos, dev->leb_size);
+	int leb = pos;
+	struct req_iterator iter;
+	struct bio_vec bvec;
+	int ret;
+
+	blk_mq_start_request(req);
+
+	/*
+	 * It is safe to ignore the return value of blk_rq_map_sg() because
+	 * the number of sg entries is limited to UBI_MAX_SG_COUNT
+	 * and ubi_read_sg() will check that limit.
+	 */
+	ubi_sgl_init(&pdu->usgl);
+	blk_rq_map_sg(req->q, req, pdu->usgl.sg);
 
 	while (bytes_left) {
 		/*
···
 
 		ret = ubi_read_sg(dev->desc, leb, &pdu->usgl, offset, to_read);
 		if (ret < 0)
-			return ret;
+			break;
 
 		bytes_left -= to_read;
 		to_read = bytes_left;
 		leb += 1;
 		offset = 0;
 	}
-	return 0;
+
+	rq_for_each_segment(bvec, req, iter)
+		flush_dcache_page(bvec.bv_page);
+	return errno_to_blk_status(ret);
 }
 
 static int ubiblock_open(struct block_device *bdev, fmode_t mode)
···
 	.getgeo	= ubiblock_getgeo,
 };
 
-static void ubiblock_do_work(struct work_struct *work)
-{
-	int ret;
-	struct ubiblock_pdu *pdu = container_of(work, struct ubiblock_pdu, work);
-	struct request *req = blk_mq_rq_from_pdu(pdu);
-	struct req_iterator iter;
-	struct bio_vec bvec;
-
-	blk_mq_start_request(req);
-
-	/*
-	 * It is safe to ignore the return value of blk_rq_map_sg() because
-	 * the number of sg entries is limited to UBI_MAX_SG_COUNT
-	 * and ubi_read_sg() will check that limit.
-	 */
-	blk_rq_map_sg(req->q, req, pdu->usgl.sg);
-
-	ret = ubiblock_read(pdu);
-
-	rq_for_each_segment(bvec, req, iter)
-		flush_dcache_page(bvec.bv_page);
-
-	blk_mq_end_request(req, errno_to_blk_status(ret));
-}
-
 static blk_status_t ubiblock_queue_rq(struct blk_mq_hw_ctx *hctx,
 			     const struct blk_mq_queue_data *bd)
 {
-	struct request *req = bd->rq;
-	struct ubiblock *dev = hctx->queue->queuedata;
-	struct ubiblock_pdu *pdu = blk_mq_rq_to_pdu(req);
-
-	switch (req_op(req)) {
+	switch (req_op(bd->rq)) {
 	case REQ_OP_READ:
-		ubi_sgl_init(&pdu->usgl);
-		queue_work(dev->wq, &pdu->work);
-		return BLK_STS_OK;
+		return ubiblock_read(bd->rq);
 	default:
 		return BLK_STS_IOERR;
 	}
-
 }
 
 static int ubiblock_init_request(struct blk_mq_tag_set *set,
···
 	struct ubiblock_pdu *pdu = blk_mq_rq_to_pdu(req);
 
 	sg_init_table(pdu->usgl.sg, UBI_MAX_SG_COUNT);
-	INIT_WORK(&pdu->work, ubiblock_do_work);
-
 	return 0;
 }
 
···
 	u64 size = vi->used_bytes >> 9;
 
 	if (vi->used_bytes % 512) {
-		pr_warn("UBI: block: volume size is not a multiple of 512, "
-			"last %llu bytes are ignored!\n",
-			vi->used_bytes - (size << 9));
+		if (vi->vol_type == UBI_DYNAMIC_VOLUME)
+			pr_warn("UBI: block: volume size is not a multiple of 512, last %llu bytes are ignored!\n",
+				vi->used_bytes - (size << 9));
+		else
+			pr_info("UBI: block: volume size is not a multiple of 512, last %llu bytes are ignored!\n",
+				vi->used_bytes - (size << 9));
 	}
 
 	if ((sector_t)size != size)
···
 	dev->tag_set.ops = &ubiblock_mq_ops;
 	dev->tag_set.queue_depth = 64;
 	dev->tag_set.numa_node = NUMA_NO_NODE;
-	dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
+	dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING;
 	dev->tag_set.cmd_size = sizeof(struct ubiblock_pdu);
 	dev->tag_set.driver_data = dev;
 	dev->tag_set.nr_hw_queues = 1;
···
 	dev->rq = gd->queue;
 	blk_queue_max_segments(dev->rq, UBI_MAX_SG_COUNT);
 
-	/*
-	 * Create one workqueue per volume (per registered block device).
-	 * Remember workqueues are cheap, they're not threads.
-	 */
-	dev->wq = alloc_workqueue("%s", 0, 0, gd->disk_name);
-	if (!dev->wq) {
-		ret = -ENOMEM;
-		goto out_remove_minor;
-	}
-
 	list_add_tail(&dev->list, &ubiblock_devices);
 
 	/* Must be the last step: anyone can call file ops from now on */
-	ret = add_disk(dev->gd);
+	ret = device_add_disk(vi->dev, dev->gd, NULL);
 	if (ret)
-		goto out_destroy_wq;
+		goto out_remove_minor;
 
 	dev_info(disk_to_dev(dev->gd), "created from ubi%d:%d(%s)",
 		 dev->ubi_num, dev->vol_id, vi->name);
 	mutex_unlock(&devices_mutex);
 	return 0;
 
-out_destroy_wq:
-	list_del(&dev->list);
-	destroy_workqueue(dev->wq);
 out_remove_minor:
+	list_del(&dev->list);
 	idr_remove(&ubiblock_minor_idr, gd->first_minor);
 out_cleanup_disk:
 	put_disk(dev->gd);
···
 {
 	/* Stop new requests to arrive */
 	del_gendisk(dev->gd);
-	/* Flush pending work */
-	destroy_workqueue(dev->wq);
 	/* Finally destroy the blk queue */
 	dev_info(disk_to_dev(dev->gd), "released");
 	put_disk(dev->gd);

drivers/mtd/ubi/build.c

···
 #define MTD_PARAM_LEN_MAX 64
 
 /* Maximum number of comma-separated items in the 'mtd=' parameter */
-#define MTD_PARAM_MAX_COUNT 4
+#define MTD_PARAM_MAX_COUNT 5
 
 /* Maximum value for the number of bad PEBs per 1024 PEBs */
 #define MAX_MTD_UBI_BEB_LIMIT 768
···
  * @ubi_num: UBI number
  * @vid_hdr_offs: VID header offset
  * @max_beb_per1024: maximum expected number of bad PEBs per 1024 PEBs
+ * @enable_fm: enable fastmap when value is non-zero
  */
 struct mtd_dev_param {
 	char name[MTD_PARAM_LEN_MAX];
 	int ubi_num;
 	int vid_hdr_offs;
 	int max_beb_per1024;
+	int enable_fm;
 };
 
 /* Numbers of elements set in the @mtd_dev_param array */
···
 			err = ubi_add_volume(ubi, ubi->volumes[i]);
 			if (err) {
 				ubi_err(ubi, "cannot add volume %d", i);
+				ubi->volumes[i] = NULL;
 				goto out_volumes;
 			}
 		}
···
 	/* Calculate default aligned sizes of EC and VID headers */
 	ubi->ec_hdr_alsize = ALIGN(UBI_EC_HDR_SIZE, ubi->hdrs_min_io_size);
 	ubi->vid_hdr_alsize = ALIGN(UBI_VID_HDR_SIZE, ubi->hdrs_min_io_size);
+
+	if (ubi->vid_hdr_offset && ((ubi->vid_hdr_offset + UBI_VID_HDR_SIZE) >
+	    ubi->vid_hdr_alsize)) {
+		ubi_err(ubi, "VID header offset %d too large.", ubi->vid_hdr_offset);
+		return -EINVAL;
+	}
 
 	dbg_gen("min_io_size      %d", ubi->min_io_size);
 	dbg_gen("max_write_size   %d", ubi->max_write_size);
···
 	ubi->dev.release = dev_release;
 	ubi->dev.class = &ubi_class;
 	ubi->dev.groups = ubi_dev_groups;
+	ubi->dev.parent = &mtd->dev;
 
 	ubi->mtd = mtd;
 	ubi->ubi_num = ubi_num;
···
 		mutex_lock(&ubi_devices_mutex);
 		err = ubi_attach_mtd_dev(mtd, p->ubi_num,
 					 p->vid_hdr_offs, p->max_beb_per1024,
-					 false);
+					 p->enable_fm == 0 ? true : false);
 		mutex_unlock(&ubi_devices_mutex);
 		if (err < 0) {
 			pr_err("UBI error: cannot attach mtd%d\n",
···
 		int err = kstrtoint(token, 10, &p->max_beb_per1024);
 
 		if (err) {
-			pr_err("UBI error: bad value for max_beb_per1024 parameter: %s",
+			pr_err("UBI error: bad value for max_beb_per1024 parameter: %s\n",
 			       token);
 			return -EINVAL;
 		}
···
 		int err = kstrtoint(token, 10, &p->ubi_num);
 
 		if (err) {
-			pr_err("UBI error: bad value for ubi_num parameter: %s",
+			pr_err("UBI error: bad value for ubi_num parameter: %s\n",
 			       token);
 			return -EINVAL;
 		}
 	} else
 		p->ubi_num = UBI_DEV_NUM_AUTO;
+
+	token = tokens[4];
+	if (token) {
+		int err = kstrtoint(token, 10, &p->enable_fm);
+
+		if (err) {
+			pr_err("UBI error: bad value for enable_fm parameter: %s\n",
+				token);
+			return -EINVAL;
+		}
+	} else
+		p->enable_fm = 0;
 
 	mtd_devs += 1;
 	return 0;
···
 		      "Optional \"max_beb_per1024\" parameter specifies the maximum expected bad eraseblock per 1024 eraseblocks. (default value ("
 		      __stringify(CONFIG_MTD_UBI_BEB_LIMIT) ") if 0)\n"
 		      "Optional \"ubi_num\" parameter specifies UBI device number which have to be assigned to the newly created UBI device (assigned automatically by default)\n"
+		      "Optional \"enable_fm\" parameter determines whether to enable fastmap during attach. If the value is non-zero, fastmap is enabled. Default value is 0.\n"
 		      "\n"
 		      "Example 1: mtd=/dev/mtd0 - attach MTD device /dev/mtd0.\n"
 		      "Example 2: mtd=content,1984 mtd=4 - attach MTD device with name \"content\" using VID header offset 1984, and MTD device number 4 with default VID header offset.\n"
 		      "Example 3: mtd=/dev/mtd1,0,25 - attach MTD device /dev/mtd1 using default VID header offset and reserve 25*nand_size_in_blocks/1024 erase blocks for bad block handling.\n"
 		      "Example 4: mtd=/dev/mtd1,0,0,5 - attach MTD device /dev/mtd1 to UBI 5 and using default values for the other fields.\n"
+		      "example 5: mtd=1,0,0,5 mtd=2,0,0,6,1 - attach MTD device /dev/mtd1 to UBI 5 and disable fastmap; attach MTD device /dev/mtd2 to UBI 6 and enable fastmap.(only works when fastmap is enabled and fm_autoconvert=Y).\n"
 		      "\t(e.g. if the NAND *chipset* has 4096 PEB, 100 will be reserved for this UBI device).");
 #ifdef CONFIG_MTD_UBI_FASTMAP
 module_param(fm_autoconvert, bool, 0644);

drivers/mtd/ubi/debug.c

···
 {
 	unsigned long ubi_num = ubi->ubi_num;
 	struct ubi_debug_info *d = &ubi->dbg;
+	umode_t mode = S_IRUSR | S_IWUSR;
 	int n;
 
 	if (!IS_ENABLED(CONFIG_DEBUG_FS))
···
 
 	d->dfs_dir = debugfs_create_dir(d->dfs_dir_name, dfs_rootdir);
 
-	d->dfs_chk_gen = debugfs_create_file("chk_gen", S_IWUSR, d->dfs_dir,
+	d->dfs_chk_gen = debugfs_create_file("chk_gen", mode, d->dfs_dir,
 					     (void *)ubi_num, &dfs_fops);
 
-	d->dfs_chk_io = debugfs_create_file("chk_io", S_IWUSR, d->dfs_dir,
+	d->dfs_chk_io = debugfs_create_file("chk_io", mode, d->dfs_dir,
 					    (void *)ubi_num, &dfs_fops);
 
-	d->dfs_chk_fastmap = debugfs_create_file("chk_fastmap", S_IWUSR,
+	d->dfs_chk_fastmap = debugfs_create_file("chk_fastmap", mode,
 						 d->dfs_dir, (void *)ubi_num,
 						 &dfs_fops);
 
-	d->dfs_disable_bgt = debugfs_create_file("tst_disable_bgt", S_IWUSR,
+	d->dfs_disable_bgt = debugfs_create_file("tst_disable_bgt", mode,
 						 d->dfs_dir, (void *)ubi_num,
 						 &dfs_fops);
 
 	d->dfs_emulate_bitflips = debugfs_create_file("tst_emulate_bitflips",
-						      S_IWUSR, d->dfs_dir,
+						      mode, d->dfs_dir,
 						      (void *)ubi_num,
 						      &dfs_fops);
 
 	d->dfs_emulate_io_failures = debugfs_create_file("tst_emulate_io_failures",
-							 S_IWUSR, d->dfs_dir,
+							 mode, d->dfs_dir,
 							 (void *)ubi_num,
 							 &dfs_fops);
 
 	d->dfs_emulate_power_cut = debugfs_create_file("tst_emulate_power_cut",
-						       S_IWUSR, d->dfs_dir,
+						       mode, d->dfs_dir,
 						       (void *)ubi_num,
 						       &dfs_fops);
 
 	d->dfs_power_cut_min = debugfs_create_file("tst_emulate_power_cut_min",
-						   S_IWUSR, d->dfs_dir,
+						   mode, d->dfs_dir,
 						   (void *)ubi_num, &dfs_fops);
 
 	d->dfs_power_cut_max = debugfs_create_file("tst_emulate_power_cut_max",
-						   S_IWUSR, d->dfs_dir,
+						   mode, d->dfs_dir,
 						   (void *)ubi_num, &dfs_fops);
 
 	debugfs_create_file("detailed_erase_block_info", S_IRUSR, d->dfs_dir,

drivers/mtd/ubi/eba.c

···
 };
 
 /**
- * next_sqnum - get next sequence number.
+ * ubi_next_sqnum - get next sequence number.
  * @ubi: UBI device description object
  *
  * This function returns next sequence number to use, which is just the current

drivers/mtd/ubi/fastmap-wl.c

···
 	if (ubi->fm_anchor) {
 		wl_tree_add(ubi->fm_anchor, &ubi->free);
 		ubi->free_count++;
+		ubi->fm_anchor = NULL;
 	}
 
-	/*
-	 * All available PEBs are in ubi->free, now is the time to get
-	 * the best anchor PEBs.
-	 */
-	ubi->fm_anchor = ubi_wl_get_fm_peb(ubi, 1);
+	if (!ubi->fm_disabled)
+		/*
+		 * All available PEBs are in ubi->free, now is the time to get
+		 * the best anchor PEBs.
+		 */
+		ubi->fm_anchor = ubi_wl_get_fm_peb(ubi, 1);
 
 	for (;;) {
 		enough = 0;

drivers/mtd/ubi/fastmap.c

···
 
 
 /**
- * new_fm_vhdr - allocate a new volume header for fastmap usage.
+ * new_fm_vbuf() - allocate a new volume header for fastmap usage.
  * @ubi: UBI device description object
  * @vol_id: the VID of the new header
  *

drivers/mtd/ubi/kapi.c

···
 	vi->name_len = vol->name_len;
 	vi->name = vol->name;
 	vi->cdev = vol->cdev.dev;
+	vi->dev = &vol->dev;
 }
 
 /**

drivers/mtd/ubi/misc.c

···
 #include "ubi.h"
 
 /**
- * calc_data_len - calculate how much real data is stored in a buffer.
+ * ubi_calc_data_len - calculate how much real data is stored in a buffer.
  * @ubi: UBI device description object
  * @buf: a buffer with the contents of the physical eraseblock
  * @length: the buffer length

drivers/mtd/ubi/vmt.c

···
 		for (i = 0; i < -pebs; i++) {
 			err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
 			if (err)
-				goto out_acc;
+				goto out_free;
 		}
 		spin_lock(&ubi->volumes_lock);
 		ubi->rsvd_pebs += pebs;
···
 		ubi->avail_pebs += pebs;
 		spin_unlock(&ubi->volumes_lock);
 	}
+	return err;
+
 out_free:
-	kfree(new_eba_tbl);
+	ubi_eba_destroy_table(new_eba_tbl);
 	return err;
 }
 
···
 	if (err) {
 		ubi_err(ubi, "cannot add character device for volume %d, error %d",
 			vol_id, err);
+		vol_release(&vol->dev);
 		return err;
 	}
 
···
 	vol->dev.groups = volume_dev_groups;
 	dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
 	err = device_register(&vol->dev);
-	if (err)
-		goto out_cdev;
+	if (err) {
+		cdev_del(&vol->cdev);
+		put_device(&vol->dev);
+		return err;
+	}
 
 	self_check_volumes(ubi);
-	return err;
-
-out_cdev:
-	cdev_del(&vol->cdev);
 	return err;
 }
 

drivers/mtd/ubi/wl.c

···
 }
 
 /**
- * wl_tree_destroy - destroy a wear-leveling entry.
+ * wl_entry_destroy - destroy a wear-leveling entry.
  * @ubi: UBI device description object
  * @e: the wear-leveling entry to add
  *
···
 
 	err = do_sync_erase(ubi, e1, vol_id, lnum, 0);
 	if (err) {
-		if (e2)
+		if (e2) {
+			spin_lock(&ubi->wl_lock);
 			wl_entry_destroy(ubi, e2);
+			spin_unlock(&ubi->wl_lock);
+		}
 		goto out_ro;
 	}
 
···
 	spin_lock(&ubi->wl_lock);
 	ubi->move_from = ubi->move_to = NULL;
 	ubi->move_to_put = ubi->wl_scheduled = 0;
+	wl_entry_destroy(ubi, e1);
+	wl_entry_destroy(ubi, e2);
 	spin_unlock(&ubi->wl_lock);
 
 	ubi_free_vid_buf(vidb);
-	wl_entry_destroy(ubi, e1);
-	wl_entry_destroy(ubi, e2);
 
 out_ro:
 	ubi_ro_mode(ubi);
···
 		/* Re-schedule the LEB for erasure */
 		err1 = schedule_erase(ubi, e, vol_id, lnum, 0, false);
 		if (err1) {
+			spin_lock(&ubi->wl_lock);
 			wl_entry_destroy(ubi, e);
+			spin_unlock(&ubi->wl_lock);
 			err = err1;
 			goto out_ro;
 		}
 		return err;
 	}
 
+	spin_lock(&ubi->wl_lock);
 	wl_entry_destroy(ubi, e);
+	spin_unlock(&ubi->wl_lock);
 	if (err != -EIO)
 		/*
 		 * If this is not %-EIO, we have no idea what to do. Scheduling
···
 retry:
 	spin_lock(&ubi->wl_lock);
 	e = ubi->lookuptbl[pnum];
+	if (!e) {
+		/*
+		 * This wl entry has been removed for some errors by other
+		 * process (eg. wear leveling worker), corresponding process
+		 * (except __erase_worker, which cannot concurrent with
+		 * ubi_wl_put_peb) will set ubi ro_mode at the same time,
+		 * just ignore this wl entry.
+		 */
+		spin_unlock(&ubi->wl_lock);
+		up_read(&ubi->fm_protect);
+		return 0;
+	}
 	if (e == ubi->move_from) {
 		/*
 		 * User is putting the physical eraseblock which was selected to

fs/jffs2/compr.c

···
 
 int __init jffs2_compressors_init(void)
 {
+	int ret = 0;
 /* Registering compressors */
-#ifdef CONFIG_JFFS2_ZLIB
-	jffs2_zlib_init();
-#endif
-#ifdef CONFIG_JFFS2_RTIME
-	jffs2_rtime_init();
-#endif
-#ifdef CONFIG_JFFS2_RUBIN
-	jffs2_rubinmips_init();
-	jffs2_dynrubin_init();
-#endif
-#ifdef CONFIG_JFFS2_LZO
-	jffs2_lzo_init();
-#endif
+	ret = jffs2_zlib_init();
+	if (ret)
+		goto exit;
+	ret = jffs2_rtime_init();
+	if (ret)
+		goto exit_zlib;
+	ret = jffs2_rubinmips_init();
+	if (ret)
+		goto exit_rtime;
+	ret = jffs2_dynrubin_init();
+	if (ret)
+		goto exit_runinmips;
+	ret = jffs2_lzo_init();
+	if (ret)
+		goto exit_dynrubin;
+
+
 /* Setting default compression mode */
 #ifdef CONFIG_JFFS2_CMODE_NONE
 	jffs2_compression_mode = JFFS2_COMPR_MODE_NONE;
···
 #endif
 #endif
 	return 0;
+
+exit_dynrubin:
+	jffs2_dynrubin_exit();
+exit_runinmips:
+	jffs2_rubinmips_exit();
+exit_rtime:
+	jffs2_rtime_exit();
+exit_zlib:
+	jffs2_zlib_exit();
+exit:
+	return ret;
 }
 
 int jffs2_compressors_exit(void)
 {
 /* Unregistering compressors */
-#ifdef CONFIG_JFFS2_LZO
 	jffs2_lzo_exit();
-#endif
-#ifdef CONFIG_JFFS2_RUBIN
 	jffs2_dynrubin_exit();
 	jffs2_rubinmips_exit();
-#endif
-#ifdef CONFIG_JFFS2_RTIME
 	jffs2_rtime_exit();
-#endif
-#ifdef CONFIG_JFFS2_ZLIB
 	jffs2_zlib_exit();
-#endif
 	return 0;
 }

fs/jffs2/compr.h

···
 void jffs2_rubinmips_exit(void);
 int jffs2_dynrubin_init(void);
 void jffs2_dynrubin_exit(void);
+#else
+static inline int jffs2_rubinmips_init(void) { return 0; }
+static inline void jffs2_rubinmips_exit(void) {}
+static inline int jffs2_dynrubin_init(void) { return 0; }
+static inline void jffs2_dynrubin_exit(void) {}
 #endif
 #ifdef CONFIG_JFFS2_RTIME
-int jffs2_rtime_init(void);
-void jffs2_rtime_exit(void);
+extern int jffs2_rtime_init(void);
+extern void jffs2_rtime_exit(void);
+#else
+static inline int jffs2_rtime_init(void) { return 0; }
+static inline void jffs2_rtime_exit(void) {}
 #endif
 #ifdef CONFIG_JFFS2_ZLIB
-int jffs2_zlib_init(void);
-void jffs2_zlib_exit(void);
+extern int jffs2_zlib_init(void);
+extern void jffs2_zlib_exit(void);
+#else
+static inline int jffs2_zlib_init(void) { return 0; }
+static inline void jffs2_zlib_exit(void) {}
 #endif
 #ifdef CONFIG_JFFS2_LZO
-int jffs2_lzo_init(void);
-void jffs2_lzo_exit(void);
+extern int jffs2_lzo_init(void);
+extern void jffs2_lzo_exit(void);
+#else
+static inline int jffs2_lzo_init(void) { return 0; }
+static inline void jffs2_lzo_exit(void) {}
 #endif
 
 #endif /* __JFFS2_COMPR_H__ */

fs/jffs2/file.c

···
 	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
 	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
 	pgoff_t index = pos >> PAGE_SHIFT;
-	uint32_t pageofs = index << PAGE_SHIFT;
 	int ret = 0;
 
 	jffs2_dbg(1, "%s()\n", __func__);
 
-	if (pageofs > inode->i_size) {
-		/* Make new hole frag from old EOF to new page */
+	if (pos > inode->i_size) {
+		/* Make new hole frag from old EOF to new position */
 		struct jffs2_raw_inode ri;
 		struct jffs2_full_dnode *fn;
 		uint32_t alloc_len;
 
-		jffs2_dbg(1, "Writing new hole frag 0x%x-0x%x between current EOF and new page\n",
-			  (unsigned int)inode->i_size, pageofs);
+		jffs2_dbg(1, "Writing new hole frag 0x%x-0x%x between current EOF and new position\n",
+			  (unsigned int)inode->i_size, (uint32_t)pos);
 
 		ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len,
 					  ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
···
 		ri.mode = cpu_to_jemode(inode->i_mode);
 		ri.uid = cpu_to_je16(i_uid_read(inode));
 		ri.gid = cpu_to_je16(i_gid_read(inode));
-		ri.isize = cpu_to_je32(max((uint32_t)inode->i_size, pageofs));
+		ri.isize = cpu_to_je32((uint32_t)pos);
 		ri.atime = ri.ctime = ri.mtime = cpu_to_je32(JFFS2_NOW());
 		ri.offset = cpu_to_je32(inode->i_size);
-		ri.dsize = cpu_to_je32(pageofs - inode->i_size);
+		ri.dsize = cpu_to_je32((uint32_t)pos - inode->i_size);
 		ri.csize = cpu_to_je32(0);
 		ri.compr = JFFS2_COMPR_ZERO;
 		ri.node_crc = cpu_to_je32(crc32(0, &ri, sizeof(ri)-8));
···
 			goto out_err;
 		}
 		jffs2_complete_reservation(c);
-		inode->i_size = pageofs;
+		inode->i_size = pos;
 		mutex_unlock(&f->sem);
 	}
 

fs/jffs2/fs.c

···
 	/* We stop if it was running, then restart if it needs to.
 	   This also catches the case where it was stopped and this
 	   is just a remount to restart it.
-	   Flush the writebuffer, if neccecary, else we loose it */
+	   Flush the writebuffer, if necessary, else we loose it */
 	if (!sb_rdonly(sb)) {
 		jffs2_stop_garbage_collect_thread(c);
 		mutex_lock(&c->alloc_sem);

fs/ubifs/budget.c

···
 	subtract_lebs += 1;
 
 	/*
-	 * The GC journal head LEB is not really accessible. And since
-	 * different write types go to different heads, we may count only on
-	 * one head's space.
+	 * Since different write types go to different heads, we should
+	 * reserve one leb for each head.
 	 */
-	subtract_lebs += c->jhead_cnt - 1;
+	subtract_lebs += c->jhead_cnt;
 
 	/* We also reserve one LEB for deletions, which bypass budgeting */
 	subtract_lebs += 1;
···
 	dd_growth = req->dirtied_page ? c->bi.page_budget : 0;
 
 	if (req->dirtied_ino)
-		dd_growth += c->bi.inode_budget << (req->dirtied_ino - 1);
+		dd_growth += c->bi.inode_budget * req->dirtied_ino;
 	if (req->mod_dent)
 		dd_growth += c->bi.dent_budget;
 	dd_growth += req->dirtied_ino_d;

fs/ubifs/dir.c

···
 	int err, sz_change, len = strlen(symname);
 	struct fscrypt_str disk_link;
 	struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
-					.new_ino_d = ALIGN(len, 8),
 					.dirtied_ino = 1 };
 	struct fscrypt_name nm;
 
···
 	 * Budget request settings: new inode, new direntry and changing parent
 	 * directory inode.
 	 */
+	req.new_ino_d = ALIGN(disk_link.len - 1, 8);
 	err = ubifs_budget_space(c, &req);
 	if (err)
 		return err;
···
 	if (unlink) {
 		ubifs_assert(c, inode_is_locked(new_inode));
 
+		/* Budget for old inode's data when its nlink > 1. */
+		req.dirtied_ino_d = ALIGN(ubifs_inode(new_inode)->data_len, 8);
 		err = ubifs_purge_xattrs(new_inode);
 		if (err)
 			return err;
···
 
 	ubifs_assert(c, fst_inode && snd_inode);
 
+	/*
+	 * Budget request settings: changing two direntries, changing the two
+	 * parent directory inodes.
+	 */
+
+	dbg_gen("dent '%pd' ino %lu in dir ino %lu exchange dent '%pd' ino %lu in dir ino %lu",
+		old_dentry, fst_inode->i_ino, old_dir->i_ino,
+		new_dentry, snd_inode->i_ino, new_dir->i_ino);
+
 	err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
 	if (err)
 		return err;
···
 		fscrypt_free_filename(&fst_nm);
 		return err;
 	}
+
+	err = ubifs_budget_space(c, &req);
+	if (err)
+		goto out;
 
 	lock_4_inodes(old_dir, new_dir, NULL, NULL);
 
···
 	unlock_4_inodes(old_dir, new_dir, NULL, NULL);
 	ubifs_release_budget(c, &req);
 
+out:
 	fscrypt_free_filename(&fst_nm);
 	fscrypt_free_filename(&snd_nm);
 	return err;

fs/ubifs/file.c

···
 		if (page->index >= synced_i_size >> PAGE_SHIFT) {
 			err = inode->i_sb->s_op->write_inode(inode, NULL);
 			if (err)
-				goto out_unlock;
+				goto out_redirty;
 			/*
 			 * The inode has been written, but the write-buffer has
 			 * not been synchronized, so in case of an unclean
···
 	if (i_size > synced_i_size) {
 		err = inode->i_sb->s_op->write_inode(inode, NULL);
 		if (err)
-			goto out_unlock;
+			goto out_redirty;
 	}
 
 	return do_writepage(page, len);
-
+out_redirty:
+	/*
+	 * redirty_page_for_writepage() won't call ubifs_dirty_inode() because
+	 * it passes I_DIRTY_PAGES flag while calling __mark_inode_dirty(), so
+	 * there is no need to do space budget for dirty inode.
+	 */
+	redirty_page_for_writepage(wbc, page);
 out_unlock:
 	unlock_page(page);
 	return err;
···
 	struct inode *inode = folio->mapping->host;
 	struct ubifs_info *c = inode->i_sb->s_fs_info;
 
-	/*
-	 * An attempt to release a dirty page without budgeting for it - should
-	 * not happen.
-	 */
 	if (folio_test_writeback(folio))
 		return false;
+
+	/*
+	 * Page is private but not dirty, weird? There is one condition
+	 * making it happened. ubifs_writepage skipped the page because
+	 * page index beyonds isize (for example. truncated by other
+	 * process named A), then the page is invalidated by fadvise64
+	 * syscall before being truncated by process A.
+	 */
 	ubifs_assert(c, folio_test_private(folio));
-	ubifs_assert(c, 0);
+	if (folio_test_checked(folio))
+		release_new_page_budget(c);
+	else
+		release_existing_page_budget(c);
+
+	atomic_long_dec(&c->dirty_pg_cnt);
 	folio_detach_private(folio);
 	folio_clear_checked(folio);
 	return true;

fs/ubifs/io.c

···
 }
 
 /**
- * wbuf_timer_callback - write-buffer timer callback function.
+ * wbuf_timer_callback_nolock - write-buffer timer callback function.
  * @timer: timer data (write-buffer descriptor)
  *
  * This function is called when the write-buffer timer expires.
···
 }
 
 /**
- * new_wbuf_timer - start new write-buffer timer.
+ * new_wbuf_timer_nolock - start new write-buffer timer.
  * @c: UBIFS file-system description object
  * @wbuf: write-buffer descriptor
  */
···
 }
 
 /**
- * cancel_wbuf_timer - cancel write-buffer timer.
+ * cancel_wbuf_timer_nolock - cancel write-buffer timer.
  * @wbuf: write-buffer descriptor
  */
 static void cancel_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)

fs/ubifs/journal.c

···
  * ubifs_jnl_rename - rename a directory entry.
  * @c: UBIFS file-system description object
  * @old_dir: parent inode of directory entry to rename
- * @old_dentry: directory entry to rename
+ * @old_inode: directory entry's inode to rename
+ * @old_nm: name of the old directory entry to rename
  * @new_dir: parent inode of directory entry to rename
- * @new_dentry: new directory entry (or directory entry to replace)
+ * @new_inode: new directory entry's inode (or directory entry's inode to
+ *		replace)
+ * @new_nm: new name of the new directory entry
+ * @whiteout: whiteout inode
  * @sync: non-zero if the write-buffer has to be synchronized
  *
  * This function implements the re-name operation which may involve writing up

fs/ubifs/super.c

···
 		INIT_LIST_HEAD(&c->jheads[i].buds_list);
 		err = ubifs_wbuf_init(c, &c->jheads[i].wbuf);
 		if (err)
-			return err;
+			goto out_wbuf;
 
 		c->jheads[i].wbuf.sync_callback = &bud_wbuf_callback;
 		c->jheads[i].wbuf.jhead = i;
···
 		c->jheads[i].log_hash = ubifs_hash_get_desc(c);
 		if (IS_ERR(c->jheads[i].log_hash)) {
 			err = PTR_ERR(c->jheads[i].log_hash);
-			goto out;
+			goto out_log_hash;
 		}
 	}
 
···
 
 	return 0;
 
-out:
-	while (i--)
+out_log_hash:
+	kfree(c->jheads[i].wbuf.buf);
+	kfree(c->jheads[i].wbuf.inodes);
+
+out_wbuf:
+	while (i--) {
+		kfree(c->jheads[i].wbuf.buf);
+		kfree(c->jheads[i].wbuf.inodes);
 		kfree(c->jheads[i].log_hash);
+	}
+	kfree(c->jheads);
+	c->jheads = NULL;
 
 	return err;
 }

fs/ubifs/sysfs.c

···
 	.show	= ubifs_attr_show,
 };
 
-static struct kobj_type ubifs_sb_ktype = {
+static const struct kobj_type ubifs_sb_ktype = {
 	.default_groups	= ubifs_groups,
 	.sysfs_ops	= &ubifs_attr_ops,
 	.release	= ubifs_sb_release,
 };
 
-static struct kobj_type ubifs_ktype = {
+static const struct kobj_type ubifs_ktype = {
 	.sysfs_ops	= &ubifs_attr_ops,
 };
 
···
 	kobject_set_name(&ubifs_kset.kobj, "ubifs");
 	ubifs_kset.kobj.parent = fs_kobj;
 	ret = kset_register(&ubifs_kset);
+	if (ret)
+		kset_put(&ubifs_kset);
 
 	return ret;
 }

fs/ubifs/tnc.c

···
 	if (zbr->len) {
 		err = insert_old_idx(c, zbr->lnum, zbr->offs);
 		if (unlikely(err))
-			return ERR_PTR(err);
+			/*
+			 * Obsolete znodes will be freed by tnc_destroy_cnext()
+			 * or free_obsolete_znodes(), copied up znodes should
+			 * be added back to tnc and freed by
+			 * ubifs_destroy_tnc_subtree().
+			 */
+			goto out;
 		err = add_idx_dirt(c, zbr->lnum, zbr->len);
 	} else
 		err = 0;
 
+out:
 	zbr->znode = zn;
 	zbr->lnum = 0;
 	zbr->offs = 0;
···
 		cnext = cnext->cnext;
 		if (ubifs_zn_obsolete(znode))
 			kfree(znode);
+		else if (!ubifs_zn_cow(znode)) {
+			/*
+			 * Don't forget to update clean znode count after
+			 * committing failed, because ubifs will check this
+			 * count while closing tnc. Non-obsolete znode could
+			 * be re-dirtied during committing process, so dirty
+			 * flag is untrustable. The flag 'COW_ZNODE' is set
+			 * for each dirty znode before committing, and it is
+			 * cleared as long as the znode become clean, so we
+			 * can statistic clean znode count according to this
+			 * flag.
+			 */
+			atomic_long_inc(&c->clean_zn_cnt);
+			atomic_long_inc(&ubifs_clean_zn_cnt);
+		}
 	} while (cnext && cnext != c->cnext);
 }
 

fs/ubifs/ubifs.h

···
 	return crypto_memneq(expected, got, c->hmac_desc_len);
 }
 
+#ifdef CONFIG_UBIFS_FS_AUTHENTICATION
 void ubifs_bad_hash(const struct ubifs_info *c, const void *node,
 		    const u8 *hash, int lnum, int offs);
+#else
+static inline void ubifs_bad_hash(const struct ubifs_info *c, const void *node,
+				  const u8 *hash, int lnum, int offs) {};
+#endif
 
 int __ubifs_node_check_hash(const struct ubifs_info *c, const void *buf,
 			  const u8 *expected);

include/linux/mtd/ubi.h

···
 	int name_len;
 	const char *name;
 	dev_t cdev;
+	struct device *dev;
 };
 
 /**