This pull request contains updates for both UBI and UBIFS:

- New config option CONFIG_UBIFS_FS_SECURITY
 - Minor improvements
 - Random fixes
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Merge tag 'upstream-4.12-rc1' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS updates from Richard Weinberger:

 - new config option CONFIG_UBIFS_FS_SECURITY

 - minor improvements

 - random fixes

* tag 'upstream-4.12-rc1' of git://git.infradead.org/linux-ubifs:
  ubi: Add debugfs file for tracking PEB state
  ubifs: Fix a typo in comment of ioctl2ubifs & ubifs2ioctl
  ubifs: Remove unnecessary assignment
  ubifs: Fix cut and paste error on sb type comparisons
  ubi: fastmap: Fix slab corruption
  ubifs: Add CONFIG_UBIFS_FS_SECURITY to disable/enable security labels
  ubi: Make mtd parameter readable
  ubi: Fix section mismatch

drivers/mtd/ubi/build.c

@@ -74,10 +74,10 @@ struct mtd_dev_param {
 };
 
 /* Numbers of elements set in the @mtd_dev_param array */
-static int __initdata mtd_devs;
+static int mtd_devs;
 
 /* MTD devices specification parameters */
-static struct mtd_dev_param __initdata mtd_dev_param[UBI_MAX_DEVICES];
+static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES];
 #ifdef CONFIG_MTD_UBI_FASTMAP
 /* UBI module parameter to enable fastmap automatically on non-fastmap images */
 static bool fm_autoconvert;
@@ -1294,7 +1294,7 @@ module_exit(ubi_exit);
  * This function returns positive resulting integer in case of success and a
  * negative error code in case of failure.
  */
-static int __init bytes_str_to_int(const char *str)
+static int bytes_str_to_int(const char *str)
 {
 	char *endp;
 	unsigned long result;
@@ -1332,7 +1332,7 @@ static int __init bytes_str_to_int(const char *str)
  * This function returns zero in case of success and a negative error code in
  * case of error.
  */
-static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
+static int ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 {
 	int i, len;
 	struct mtd_dev_param *p;
@@ -1413,7 +1413,7 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 	return 0;
 }
 
-module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000);
+module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 0400);
 MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: mtd=<name|num|path>[,<vid_hdr_offs>[,max_beb_per1024[,ubi_num]]].\n"
 		      "Multiple \"mtd\" parameters may be specified.\n"
 		      "MTD devices may be specified by their number, name, or path to the MTD character device node.\n"

drivers/mtd/ubi/debug.c

@@ -22,6 +22,7 @@
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
 #include <linux/module.h>
+#include <linux/seq_file.h>
 
 
 /**
@@ -386,7 +387,9 @@ static ssize_t dfs_file_write(struct file *file, const char __user *user_buf,
 	return count;
 }
 
-/* File operations for all UBI debugfs files */
+/* File operations for all UBI debugfs files except
+ * detailed_erase_block_info
+ */
 static const struct file_operations dfs_fops = {
 	.read   = dfs_file_read,
 	.write  = dfs_file_write,
@@ -395,6 +398,121 @@ static const struct file_operations dfs_fops = {
 	.owner  = THIS_MODULE,
 };
 
+/* As long as the position is less then that total number of erase blocks,
+ * we still have more to print.
+ */
+static void *eraseblk_count_seq_start(struct seq_file *s, loff_t *pos)
+{
+	struct ubi_device *ubi = s->private;
+
+	if (*pos == 0)
+		return SEQ_START_TOKEN;
+
+	if (*pos < ubi->peb_count)
+		return pos;
+
+	return NULL;
+}
+
+/* Since we are using the position as the iterator, we just need to check if we
+ * are done and increment the position.
+ */
+static void *eraseblk_count_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+	struct ubi_device *ubi = s->private;
+
+	if (v == SEQ_START_TOKEN)
+		return pos;
+	(*pos)++;
+
+	if (*pos < ubi->peb_count)
+		return pos;
+
+	return NULL;
+}
+
+static void eraseblk_count_seq_stop(struct seq_file *s, void *v)
+{
+}
+
+static int eraseblk_count_seq_show(struct seq_file *s, void *iter)
+{
+	struct ubi_device *ubi = s->private;
+	struct ubi_wl_entry *wl;
+	int *block_number = iter;
+	int erase_count = -1;
+	int err;
+
+	/* If this is the start, print a header */
+	if (iter == SEQ_START_TOKEN) {
+		seq_puts(s,
+			 "physical_block_number\terase_count\tblock_status\tread_status\n");
+		return 0;
+	}
+
+	err = ubi_io_is_bad(ubi, *block_number);
+	if (err)
+		return err;
+
+	spin_lock(&ubi->wl_lock);
+
+	wl = ubi->lookuptbl[*block_number];
+	if (wl)
+		erase_count = wl->ec;
+
+	spin_unlock(&ubi->wl_lock);
+
+	if (erase_count < 0)
+		return 0;
+
+	seq_printf(s, "%-22d\t%-11d\n", *block_number, erase_count);
+
+	return 0;
+}
+
+static const struct seq_operations eraseblk_count_seq_ops = {
+	.start = eraseblk_count_seq_start,
+	.next = eraseblk_count_seq_next,
+	.stop = eraseblk_count_seq_stop,
+	.show = eraseblk_count_seq_show
+};
+
+static int eraseblk_count_open(struct inode *inode, struct file *f)
+{
+	struct seq_file *s;
+	int err;
+
+	err = seq_open(f, &eraseblk_count_seq_ops);
+	if (err)
+		return err;
+
+	s = f->private_data;
+	s->private = ubi_get_device((unsigned long)inode->i_private);
+
+	if (!s->private)
+		return -ENODEV;
+	else
+		return 0;
+}
+
+static int eraseblk_count_release(struct inode *inode, struct file *f)
+{
+	struct seq_file *s = f->private_data;
+	struct ubi_device *ubi = s->private;
+
+	ubi_put_device(ubi);
+
+	return seq_release(inode, f);
+}
+
+static const struct file_operations eraseblk_count_fops = {
+	.owner = THIS_MODULE,
+	.open = eraseblk_count_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = eraseblk_count_release,
+};
+
 /**
  * ubi_debugfs_init_dev - initialize debugfs for an UBI device.
  * @ubi: UBI device description object
@@ -491,6 +609,12 @@ int ubi_debugfs_init_dev(struct ubi_device *ubi)
 		goto out_remove;
 	d->dfs_power_cut_max = dent;
 
+	fname = "detailed_erase_block_info";
+	dent = debugfs_create_file(fname, S_IRUSR, d->dfs_dir, (void *)ubi_num,
+				   &eraseblk_count_fops);
+	if (IS_ERR_OR_NULL(dent))
+		goto out_remove;
+
 	return 0;
 
 out_remove:

drivers/mtd/ubi/fastmap.c

@@ -828,6 +828,24 @@ static int find_fm_anchor(struct ubi_attach_info *ai)
 	return ret;
 }
 
+static struct ubi_ainf_peb *clone_aeb(struct ubi_attach_info *ai,
+				      struct ubi_ainf_peb *old)
+{
+	struct ubi_ainf_peb *new;
+
+	new = ubi_alloc_aeb(ai, old->pnum, old->ec);
+	if (!new)
+		return NULL;
+
+	new->vol_id = old->vol_id;
+	new->sqnum = old->sqnum;
+	new->lnum = old->lnum;
+	new->scrub = old->scrub;
+	new->copy_flag = old->copy_flag;
+
+	return new;
+}
+
 /**
  * ubi_scan_fastmap - scan the fastmap.
  * @ubi: UBI device object
@@ -847,7 +865,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 	struct ubi_vid_hdr *vh;
 	struct ubi_ec_hdr *ech;
 	struct ubi_fastmap_layout *fm;
-	struct ubi_ainf_peb *tmp_aeb, *aeb;
+	struct ubi_ainf_peb *aeb;
 	int i, used_blocks, pnum, fm_anchor, ret = 0;
 	size_t fm_size;
 	__be32 crc, tmp_crc;
@@ -857,9 +875,16 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 	if (fm_anchor < 0)
 		return UBI_NO_FASTMAP;
 
-	/* Move all (possible) fastmap blocks into our new attach structure. */
+	/* Copy all (possible) fastmap blocks into our new attach structure. */
-	list_for_each_entry_safe(aeb, tmp_aeb, &scan_ai->fastmap, u.list)
+	list_for_each_entry(aeb, &scan_ai->fastmap, u.list) {
-		list_move_tail(&aeb->u.list, &ai->fastmap);
+		struct ubi_ainf_peb *new;
+
+		new = clone_aeb(ai, aeb);
+		if (!new)
+			return -ENOMEM;
+
+		list_add(&new->u.list, &ai->fastmap);
+	}
 
 	down_write(&ubi->fm_protect);
 	memset(ubi->fm_buf, 0, ubi->fm_size);

fs/ubifs/Kconfig

@@ -61,3 +61,16 @@ config UBIFS_FS_ENCRYPTION
 	  feature is similar to ecryptfs, but it is more memory
 	  efficient since it avoids caching the encrypted and
 	  decrypted pages in the page cache.
+
+config UBIFS_FS_SECURITY
+	bool "UBIFS Security Labels"
+	depends on UBIFS_FS
+	default y
+	help
+	  Security labels provide an access control facility to support Linux
+	  Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
+	  Linux. This option enables an extended attribute handler for file
+	  security labels in the ubifs filesystem, so that it requires enabling
+	  the extended attribute support in advance.
+
+	  If you are not using a security module, say N.

fs/ubifs/debug.c

@@ -2391,8 +2391,8 @@ int dbg_check_nondata_nodes_order(struct ubifs_info *c, struct list_head *head)
 			ubifs_dump_node(c, sa->node);
 			return -EINVAL;
 		}
-		if (sa->type != UBIFS_INO_NODE && sa->type != UBIFS_DENT_NODE &&
+		if (sb->type != UBIFS_INO_NODE && sb->type != UBIFS_DENT_NODE &&
-		    sa->type != UBIFS_XENT_NODE) {
+		    sb->type != UBIFS_XENT_NODE) {
 			ubifs_err(c, "bad node type %d", sb->type);
 			ubifs_dump_node(c, sb->node);
 			return -EINVAL;

fs/ubifs/ioctl.c

@@ -53,7 +53,7 @@ void ubifs_set_inode_flags(struct inode *inode)
  * ioctl2ubifs - convert ioctl inode flags to UBIFS inode flags.
  * @ioctl_flags: flags to convert
  *
- * This function convert ioctl flags (@FS_COMPR_FL, etc) to UBIFS inode flags
+ * This function converts ioctl flags (@FS_COMPR_FL, etc) to UBIFS inode flags
  * (@UBIFS_COMPR_FL, etc).
  */
 static int ioctl2ubifs(int ioctl_flags)
@@ -78,8 +78,8 @@ static int ioctl2ubifs(int ioctl_flags)
  * ubifs2ioctl - convert UBIFS inode flags to ioctl inode flags.
  * @ubifs_flags: flags to convert
  *
- * This function convert UBIFS (@UBIFS_COMPR_FL, etc) to ioctl flags
+ * This function converts UBIFS inode flags (@UBIFS_COMPR_FL, etc) to ioctl
- * (@FS_COMPR_FL, etc).
+ * flags (@FS_COMPR_FL, etc).
  */
 static int ubifs2ioctl(int ubifs_flags)
 {

fs/ubifs/recovery.c

@@ -442,7 +442,6 @@ static void clean_buf(const struct ubifs_info *c, void **buf, int lnum,
 {
 	int empty_offs, pad_len;
 
-	lnum = lnum;
 	dbg_rcvry("cleaning corruption at %d:%d", lnum, *offs);
 
 	ubifs_assert(!(*offs & 7));

fs/ubifs/ubifs.h

@@ -1753,13 +1753,23 @@ int ubifs_check_dir_empty(struct inode *dir);
 /* xattr.c */
 extern const struct xattr_handler *ubifs_xattr_handlers[];
 ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size);
-int ubifs_init_security(struct inode *dentry, struct inode *inode,
-			const struct qstr *qstr);
 int ubifs_xattr_set(struct inode *host, const char *name, const void *value,
 		    size_t size, int flags);
 ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf,
 			size_t size);
 
+#ifdef CONFIG_UBIFS_FS_SECURITY
+extern int ubifs_init_security(struct inode *dentry, struct inode *inode,
+			const struct qstr *qstr);
+#else
+static inline int ubifs_init_security(struct inode *dentry,
+			struct inode *inode, const struct qstr *qstr)
+{
+	return 0;
+}
+#endif
+
+
 /* super.c */
 struct inode *ubifs_iget(struct super_block *sb, unsigned long inum);
 

fs/ubifs/xattr.c

@@ -559,6 +559,7 @@ static int ubifs_xattr_remove(struct inode *host, const char *name)
 	return err;
 }
 
+#ifdef CONFIG_UBIFS_FS_SECURITY
 static int init_xattrs(struct inode *inode, const struct xattr *xattr_array,
 		      void *fs_info)
 {
@@ -599,6 +600,7 @@ int ubifs_init_security(struct inode *dentry, struct inode *inode,
 	}
 	return err;
 }
+#endif
 
 static int xattr_get(const struct xattr_handler *handler,
 			   struct dentry *dentry, struct inode *inode,
@@ -639,15 +641,19 @@ static const struct xattr_handler ubifs_trusted_xattr_handler = {
 	.set = xattr_set,
 };
 
+#ifdef CONFIG_UBIFS_FS_SECURITY
 static const struct xattr_handler ubifs_security_xattr_handler = {
 	.prefix = XATTR_SECURITY_PREFIX,
 	.get = xattr_get,
 	.set = xattr_set,
 };
+#endif
 
 const struct xattr_handler *ubifs_xattr_handlers[] = {
 	&ubifs_user_xattr_handler,
 	&ubifs_trusted_xattr_handler,
+#ifdef CONFIG_UBIFS_FS_SECURITY
 	&ubifs_security_xattr_handler,
+#endif
 	NULL
 };