1 files changed, 108 insertions, 59 deletions

diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 004d3745dc45..0bb2bcef0de9 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -34,7 +34,6 @@
 #include <linux/moduleparam.h>
 #include <linux/debugfs.h>
 #include <linux/math64.h>
-#include <linux/slab.h>
 
 #ifdef CONFIG_UBIFS_FS_DEBUG
 
@@ -43,15 +42,12 @@ DEFINE_SPINLOCK(dbg_lock);
 static char dbg_key_buf0[128];
 static char dbg_key_buf1[128];
 
-unsigned int ubifs_msg_flags;
 unsigned int ubifs_chk_flags;
 unsigned int ubifs_tst_flags;
 
-module_param_named(debug_msgs, ubifs_msg_flags, uint, S_IRUGO | S_IWUSR);
 module_param_named(debug_chks, ubifs_chk_flags, uint, S_IRUGO | S_IWUSR);
 module_param_named(debug_tsts, ubifs_tst_flags, uint, S_IRUGO | S_IWUSR);
 
-MODULE_PARM_DESC(debug_msgs, "Debug message type flags");
 MODULE_PARM_DESC(debug_chks, "Debug check flags");
 MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
 
@@ -317,6 +313,8 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
 		printk(KERN_DEBUG "\tflags          %#x\n", sup_flags);
 		printk(KERN_DEBUG "\t  big_lpt      %u\n",
 		       !!(sup_flags & UBIFS_FLG_BIGLPT));
+		printk(KERN_DEBUG "\t  space_fixup  %u\n",
+		       !!(sup_flags & UBIFS_FLG_SPACE_FIXUP));
 		printk(KERN_DEBUG "\tmin_io_size    %u\n",
 		       le32_to_cpu(sup->min_io_size));
 		printk(KERN_DEBUG "\tleb_size       %u\n",
@@ -602,7 +600,7 @@ void dbg_dump_lstats(const struct ubifs_lp_stats *lst)
 	spin_unlock(&dbg_lock);
 }
 
-void dbg_dump_budg(struct ubifs_info *c)
+void dbg_dump_budg(struct ubifs_info *c, const struct ubifs_budg_info *bi)
 {
 	int i;
 	struct rb_node *rb;
@@ -610,26 +608,42 @@ void dbg_dump_budg(struct ubifs_info *c)
 	struct ubifs_gced_idx_leb *idx_gc;
 	long long available, outstanding, free;
 
-	ubifs_assert(spin_is_locked(&c->space_lock));
+	spin_lock(&c->space_lock);
 	spin_lock(&dbg_lock);
-	printk(KERN_DEBUG "(pid %d) Budgeting info: budg_data_growth %lld, "
-	       "budg_dd_growth %lld, budg_idx_growth %lld\n", current->pid,
-	       c->budg_data_growth, c->budg_dd_growth, c->budg_idx_growth);
-	printk(KERN_DEBUG "\tdata budget sum %lld, total budget sum %lld, "
-	       "freeable_cnt %d\n", c->budg_data_growth + c->budg_dd_growth,
-	       c->budg_data_growth + c->budg_dd_growth + c->budg_idx_growth,
-	       c->freeable_cnt);
-	printk(KERN_DEBUG "\tmin_idx_lebs %d, old_idx_sz %lld, "
-	       "calc_idx_sz %lld, idx_gc_cnt %d\n", c->min_idx_lebs,
-	       c->old_idx_sz, c->calc_idx_sz, c->idx_gc_cnt);
+	printk(KERN_DEBUG "(pid %d) Budgeting info: data budget sum %lld, "
+	       "total budget sum %lld\n", current->pid,
+	       bi->data_growth + bi->dd_growth,
+	       bi->data_growth + bi->dd_growth + bi->idx_growth);
+	printk(KERN_DEBUG "\tbudg_data_growth %lld, budg_dd_growth %lld, "
+	       "budg_idx_growth %lld\n", bi->data_growth, bi->dd_growth,
+	       bi->idx_growth);
+	printk(KERN_DEBUG "\tmin_idx_lebs %d, old_idx_sz %llu, "
+	       "uncommitted_idx %lld\n", bi->min_idx_lebs, bi->old_idx_sz,
+	       bi->uncommitted_idx);
+	printk(KERN_DEBUG "\tpage_budget %d, inode_budget %d, dent_budget %d\n",
+	       bi->page_budget, bi->inode_budget, bi->dent_budget);
+	printk(KERN_DEBUG "\tnospace %u, nospace_rp %u\n",
+	       bi->nospace, bi->nospace_rp);
+	printk(KERN_DEBUG "\tdark_wm %d, dead_wm %d, max_idx_node_sz %d\n",
+	       c->dark_wm, c->dead_wm, c->max_idx_node_sz);
+
+	if (bi != &c->bi)
+		/*
+		 * If we are dumping saved budgeting data, do not print
+		 * additional information which is about the current state, not
+		 * the old one which corresponded to the saved budgeting data.
+		 */
+		goto out_unlock;
+
+	printk(KERN_DEBUG "\tfreeable_cnt %d, calc_idx_sz %lld, idx_gc_cnt %d\n",
+	       c->freeable_cnt, c->calc_idx_sz, c->idx_gc_cnt);
 	printk(KERN_DEBUG "\tdirty_pg_cnt %ld, dirty_zn_cnt %ld, "
 	       "clean_zn_cnt %ld\n", atomic_long_read(&c->dirty_pg_cnt),
 	       atomic_long_read(&c->dirty_zn_cnt),
 	       atomic_long_read(&c->clean_zn_cnt));
-	printk(KERN_DEBUG "\tdark_wm %d, dead_wm %d, max_idx_node_sz %d\n",
-	       c->dark_wm, c->dead_wm, c->max_idx_node_sz);
 	printk(KERN_DEBUG "\tgc_lnum %d, ihead_lnum %d\n",
 	       c->gc_lnum, c->ihead_lnum);
+
 	/* If we are in R/O mode, journal heads do not exist */
 	if (c->jheads)
 		for (i = 0; i < c->jhead_cnt; i++)
@@ -648,13 +662,15 @@ void dbg_dump_budg(struct ubifs_info *c)
 	printk(KERN_DEBUG "\tcommit state %d\n", c->cmt_state);
 
 	/* Print budgeting predictions */
-	available = ubifs_calc_available(c, c->min_idx_lebs);
-	outstanding = c->budg_data_growth + c->budg_dd_growth;
+	available = ubifs_calc_available(c, c->bi.min_idx_lebs);
+	outstanding = c->bi.data_growth + c->bi.dd_growth;
 	free = ubifs_get_free_space_nolock(c);
 	printk(KERN_DEBUG "Budgeting predictions:\n");
 	printk(KERN_DEBUG "\tavailable: %lld, outstanding %lld, free %lld\n",
 	       available, outstanding, free);
+out_unlock:
 	spin_unlock(&dbg_lock);
+	spin_unlock(&c->space_lock);
 }
 
 void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp)
@@ -729,7 +745,13 @@ void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp)
 		if (bud->lnum == lp->lnum) {
 			int head = 0;
 			for (i = 0; i < c->jhead_cnt; i++) {
-				if (lp->lnum == c->jheads[i].wbuf.lnum) {
+				/*
+				 * Note, if we are in R/O mode or in the middle
+				 * of mounting/re-mounting, the write-buffers do
+				 * not exist.
+				 */
+				if (c->jheads &&
+				    lp->lnum == c->jheads[i].wbuf.lnum) {
 					printk(KERN_CONT ", jhead %s",
 					       dbg_jhead(i));
 					head = 1;
@@ -976,6 +998,8 @@ void dbg_save_space_info(struct ubifs_info *c)
 
 	spin_lock(&c->space_lock);
 	memcpy(&d->saved_lst, &c->lst, sizeof(struct ubifs_lp_stats));
+	memcpy(&d->saved_bi, &c->bi, sizeof(struct ubifs_budg_info));
+	d->saved_idx_gc_cnt = c->idx_gc_cnt;
 
 	/*
 	 * We use a dirty hack here and zero out @c->freeable_cnt, because it
@@ -1042,14 +1066,14 @@ int dbg_check_space_info(struct ubifs_info *c)
 out:
 	ubifs_msg("saved lprops statistics dump");
 	dbg_dump_lstats(&d->saved_lst);
-	ubifs_get_lp_stats(c, &lst);
-
+	ubifs_msg("saved budgeting info dump");
+	dbg_dump_budg(c, &d->saved_bi);
+	ubifs_msg("saved idx_gc_cnt %d", d->saved_idx_gc_cnt);
 	ubifs_msg("current lprops statistics dump");
+	ubifs_get_lp_stats(c, &lst);
 	dbg_dump_lstats(&lst);
-
-	spin_lock(&c->space_lock);
-	dbg_dump_budg(c);
-	spin_unlock(&c->space_lock);
+	ubifs_msg("current budgeting info dump");
+	dbg_dump_budg(c, &c->bi);
 	dump_stack();
 	return -EINVAL;
 }
@@ -1793,6 +1817,8 @@ static struct fsck_inode *add_inode(struct ubifs_info *c,
 	struct rb_node **p, *parent = NULL;
 	struct fsck_inode *fscki;
 	ino_t inum = key_inum_flash(c, &ino->key);
+	struct inode *inode;
+	struct ubifs_inode *ui;
 
 	p = &fsckd->inodes.rb_node;
 	while (*p) {
@@ -1816,19 +1842,46 @@ static struct fsck_inode *add_inode(struct ubifs_info *c,
 	if (!fscki)
 		return ERR_PTR(-ENOMEM);
 
+	inode = ilookup(c->vfs_sb, inum);
+
 	fscki->inum = inum;
-	fscki->nlink = le32_to_cpu(ino->nlink);
-	fscki->size = le64_to_cpu(ino->size);
-	fscki->xattr_cnt = le32_to_cpu(ino->xattr_cnt);
-	fscki->xattr_sz = le32_to_cpu(ino->xattr_size);
-	fscki->xattr_nms = le32_to_cpu(ino->xattr_names);
-	fscki->mode = le32_to_cpu(ino->mode);
+	/*
+	 * If the inode is present in the VFS inode cache, use it instead of
+	 * the on-flash inode which might be out-of-date. E.g., the size might
+	 * be out-of-date. If we do not do this, the following may happen, for
+	 * example:
+	 *   1. A power cut happens
+	 *   2. We mount the file-system R/O, the replay process fixes up the
+	 *      inode size in the VFS cache, but on on-flash.
+	 *   3. 'check_leaf()' fails because it hits a data node beyond inode
+	 *      size.
+	 */
+	if (!inode) {
+		fscki->nlink = le32_to_cpu(ino->nlink);
+		fscki->size = le64_to_cpu(ino->size);
+		fscki->xattr_cnt = le32_to_cpu(ino->xattr_cnt);
+		fscki->xattr_sz = le32_to_cpu(ino->xattr_size);
+		fscki->xattr_nms = le32_to_cpu(ino->xattr_names);
+		fscki->mode = le32_to_cpu(ino->mode);
+	} else {
+		ui = ubifs_inode(inode);
+		fscki->nlink = inode->i_nlink;
+		fscki->size = inode->i_size;
+		fscki->xattr_cnt = ui->xattr_cnt;
+		fscki->xattr_sz = ui->xattr_size;
+		fscki->xattr_nms = ui->xattr_names;
+		fscki->mode = inode->i_mode;
+		iput(inode);
+	}
+
 	if (S_ISDIR(fscki->mode)) {
 		fscki->calc_sz = UBIFS_INO_NODE_SZ;
 		fscki->calc_cnt = 2;
 	}
+
 	rb_link_node(&fscki->rb, parent, p);
 	rb_insert_color(&fscki->rb, &fsckd->inodes);
+
 	return fscki;
 }
 
@@ -2421,7 +2474,8 @@ int dbg_check_nondata_nodes_order(struct ubifs_info *c, struct list_head *head)
 		hashb = key_block(c, &sb->key);
 
 		if (hasha > hashb) {
-			ubifs_err("larger hash %u goes before %u", hasha, hashb);
+			ubifs_err("larger hash %u goes before %u",
+				  hasha, hashb);
 			goto error_dump;
 		}
 	}
@@ -2437,14 +2491,12 @@ error_dump:
 	return 0;
 }
 
-static int invocation_cnt;
-
 int dbg_force_in_the_gaps(void)
 {
-	if (!dbg_force_in_the_gaps_enabled)
+	if (!(ubifs_chk_flags & UBIFS_CHK_GEN))
 		return 0;
-	/* Force in-the-gaps every 8th commit */
-	return !((invocation_cnt++) & 0x7);
+
+	return !(random32() & 7);
 }
 
 /* Failure mode for recovery testing */
@@ -2632,7 +2684,7 @@ int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
 		 int len, int check)
 {
 	if (in_failure_mode(desc))
-		return -EIO;
+		return -EROFS;
 	return ubi_leb_read(desc, lnum, buf, offset, len, check);
 }
 
@@ -2642,7 +2694,7 @@ int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
 	int err, failing;
 
 	if (in_failure_mode(desc))
-		return -EIO;
+		return -EROFS;
 	failing = do_fail(desc, lnum, 1);
 	if (failing)
 		cut_data(buf, len);
@@ -2650,7 +2702,7 @@ int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
 	if (err)
 		return err;
 	if (failing)
-		return -EIO;
+		return -EROFS;
 	return 0;
 }
 
@@ -2660,12 +2712,12 @@ int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
 	int err;
 
 	if (do_fail(desc, lnum, 1))
-		return -EIO;
+		return -EROFS;
 	err = ubi_leb_change(desc, lnum, buf, len, dtype);
 	if (err)
 		return err;
 	if (do_fail(desc, lnum, 1))
-		return -EIO;
+		return -EROFS;
 	return 0;
 }
 
@@ -2674,12 +2726,12 @@ int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum)
 	int err;
 
 	if (do_fail(desc, lnum, 0))
-		return -EIO;
+		return -EROFS;
 	err = ubi_leb_erase(desc, lnum);
 	if (err)
 		return err;
 	if (do_fail(desc, lnum, 0))
-		return -EIO;
+		return -EROFS;
 	return 0;
 }
 
@@ -2688,19 +2740,19 @@ int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum)
 	int err;
 
 	if (do_fail(desc, lnum, 0))
-		return -EIO;
+		return -EROFS;
 	err = ubi_leb_unmap(desc, lnum);
 	if (err)
 		return err;
 	if (do_fail(desc, lnum, 0))
-		return -EIO;
+		return -EROFS;
 	return 0;
 }
 
 int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum)
 {
 	if (in_failure_mode(desc))
-		return -EIO;
+		return -EROFS;
 	return ubi_is_mapped(desc, lnum);
 }
 
@@ -2709,12 +2761,12 @@ int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype)
 	int err;
 
 	if (do_fail(desc, lnum, 0))
-		return -EIO;
+		return -EROFS;
 	err = ubi_leb_map(desc, lnum, dtype);
 	if (err)
 		return err;
 	if (do_fail(desc, lnum, 0))
-		return -EIO;
+		return -EROFS;
 	return 0;
 }
 
@@ -2784,7 +2836,7 @@ void dbg_debugfs_exit(void)
 static int open_debugfs_file(struct inode *inode, struct file *file)
 {
 	file->private_data = inode->i_private;
-	return 0;
+	return nonseekable_open(inode, file);
 }
 
 static ssize_t write_debugfs_file(struct file *file, const char __user *buf,
@@ -2795,18 +2847,15 @@ static ssize_t write_debugfs_file(struct file *file, const char __user *buf,
 
 	if (file->f_path.dentry == d->dfs_dump_lprops)
 		dbg_dump_lprops(c);
-	else if (file->f_path.dentry == d->dfs_dump_budg) {
-		spin_lock(&c->space_lock);
-		dbg_dump_budg(c);
-		spin_unlock(&c->space_lock);
-	} else if (file->f_path.dentry == d->dfs_dump_tnc) {
+	else if (file->f_path.dentry == d->dfs_dump_budg)
+		dbg_dump_budg(c, &c->bi);
+	else if (file->f_path.dentry == d->dfs_dump_tnc) {
 		mutex_lock(&c->tnc_mutex);
 		dbg_dump_tnc(c);
 		mutex_unlock(&c->tnc_mutex);
 	} else
 		return -EINVAL;
 
-	*ppos += count;
 	return count;
 }
 
@@ -2814,7 +2863,7 @@ static const struct file_operations dfs_fops = {
 	.open = open_debugfs_file,
 	.write = write_debugfs_file,
 	.owner = THIS_MODULE,
-	.llseek = default_llseek,
+	.llseek = no_llseek,
 };
 
 /**