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

3 files changed, 159 insertions, 10 deletions

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 8bae3731d039..93e5d251a9e4 100644
--- a/drivers/mtd/ubi/build.c
+++ b/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"
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index f101a4985a7c..7bc96294ae4d 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/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 @@ out:
         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:
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index c1f5c29e458e..b44c8d348e78 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/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. */
-        list_for_each_entry_safe(aeb, tmp_aeb, &scan_ai->fastmap, u.list)
-                list_move_tail(&aeb->u.list, &ai->fastmap);
+        /* Copy all (possible) fastmap blocks into our new attach structure. */
+        list_for_each_entry(aeb, &scan_ai->fastmap, u.list) {
+                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);