These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 102 insertions, 66 deletions

diff --git a/kernel/fs/ext4/ialloc.c b/kernel/fs/ext4/ialloc.c
index 1eaa6cb96..53f2b98a6 100644
--- a/kernel/fs/ext4/ialloc.c
+++ b/kernel/fs/ext4/ialloc.c
@@ -64,7 +64,7 @@ void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap)
 }
 
 /* Initializes an uninitialized inode bitmap */
-static unsigned ext4_init_inode_bitmap(struct super_block *sb,
+static int ext4_init_inode_bitmap(struct super_block *sb,
 				       struct buffer_head *bh,
 				       ext4_group_t block_group,
 				       struct ext4_group_desc *gdp)
@@ -76,7 +76,6 @@ static unsigned ext4_init_inode_bitmap(struct super_block *sb,
 	/* If checksum is bad mark all blocks and inodes use to prevent
 	 * allocation, essentially implementing a per-group read-only flag. */
 	if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) {
-		ext4_error(sb, "Checksum bad for group %u", block_group);
 		grp = ext4_get_group_info(sb, block_group);
 		if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
 			percpu_counter_sub(&sbi->s_freeclusters_counter,
@@ -89,7 +88,7 @@ static unsigned ext4_init_inode_bitmap(struct super_block *sb,
 					   count);
 		}
 		set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state);
-		return 0;
+		return -EFSBADCRC;
 	}
 
 	memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8);
@@ -99,7 +98,7 @@ static unsigned ext4_init_inode_bitmap(struct super_block *sb,
 				   EXT4_INODES_PER_GROUP(sb) / 8);
 	ext4_group_desc_csum_set(sb, block_group, gdp);
 
-	return EXT4_INODES_PER_GROUP(sb);
+	return 0;
 }
 
 void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate)
@@ -112,6 +111,42 @@ void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate)
 	put_bh(bh);
 }
 
+static int ext4_validate_inode_bitmap(struct super_block *sb,
+				      struct ext4_group_desc *desc,
+				      ext4_group_t block_group,
+				      struct buffer_head *bh)
+{
+	ext4_fsblk_t	blk;
+	struct ext4_group_info *grp = ext4_get_group_info(sb, block_group);
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+	if (buffer_verified(bh))
+		return 0;
+	if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp))
+		return -EFSCORRUPTED;
+
+	ext4_lock_group(sb, block_group);
+	blk = ext4_inode_bitmap(sb, desc);
+	if (!ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh,
+					   EXT4_INODES_PER_GROUP(sb) / 8)) {
+		ext4_unlock_group(sb, block_group);
+		ext4_error(sb, "Corrupt inode bitmap - block_group = %u, "
+			   "inode_bitmap = %llu", block_group, blk);
+		grp = ext4_get_group_info(sb, block_group);
+		if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
+			int count;
+			count = ext4_free_inodes_count(sb, desc);
+			percpu_counter_sub(&sbi->s_freeinodes_counter,
+					   count);
+		}
+		set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state);
+		return -EFSBADCRC;
+	}
+	set_buffer_verified(bh);
+	ext4_unlock_group(sb, block_group);
+	return 0;
+}
+
 /*
  * Read the inode allocation bitmap for a given block_group, reading
  * into the specified slot in the superblock's bitmap cache.
@@ -124,12 +159,11 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
 	struct ext4_group_desc *desc;
 	struct buffer_head *bh = NULL;
 	ext4_fsblk_t bitmap_blk;
-	struct ext4_group_info *grp;
-	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	int err;
 
 	desc = ext4_get_group_desc(sb, block_group, NULL);
 	if (!desc)
-		return NULL;
+		return ERR_PTR(-EFSCORRUPTED);
 
 	bitmap_blk = ext4_inode_bitmap(sb, desc);
 	bh = sb_getblk(sb, bitmap_blk);
@@ -137,7 +171,7 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
 		ext4_error(sb, "Cannot read inode bitmap - "
 			    "block_group = %u, inode_bitmap = %llu",
 			    block_group, bitmap_blk);
-		return NULL;
+		return ERR_PTR(-EIO);
 	}
 	if (bitmap_uptodate(bh))
 		goto verify;
@@ -150,12 +184,17 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
 
 	ext4_lock_group(sb, block_group);
 	if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
-		ext4_init_inode_bitmap(sb, bh, block_group, desc);
+		err = ext4_init_inode_bitmap(sb, bh, block_group, desc);
 		set_bitmap_uptodate(bh);
 		set_buffer_uptodate(bh);
 		set_buffer_verified(bh);
 		ext4_unlock_group(sb, block_group);
 		unlock_buffer(bh);
+		if (err) {
+			ext4_error(sb, "Failed to init inode bitmap for group "
+				   "%u: %d", block_group, err);
+			goto out;
+		}
 		return bh;
 	}
 	ext4_unlock_group(sb, block_group);
@@ -182,31 +221,17 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
 		ext4_error(sb, "Cannot read inode bitmap - "
 			   "block_group = %u, inode_bitmap = %llu",
 			   block_group, bitmap_blk);
-		return NULL;
+		return ERR_PTR(-EIO);
 	}
 
 verify:
-	ext4_lock_group(sb, block_group);
-	if (!buffer_verified(bh) &&
-	    !ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh,
-					   EXT4_INODES_PER_GROUP(sb) / 8)) {
-		ext4_unlock_group(sb, block_group);
-		put_bh(bh);
-		ext4_error(sb, "Corrupt inode bitmap - block_group = %u, "
-			   "inode_bitmap = %llu", block_group, bitmap_blk);
-		grp = ext4_get_group_info(sb, block_group);
-		if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
-			int count;
-			count = ext4_free_inodes_count(sb, desc);
-			percpu_counter_sub(&sbi->s_freeinodes_counter,
-					   count);
-		}
-		set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state);
-		return NULL;
-	}
-	ext4_unlock_group(sb, block_group);
-	set_buffer_verified(bh);
+	err = ext4_validate_inode_bitmap(sb, desc, block_group, bh);
+	if (err)
+		goto out;
 	return bh;
+out:
+	put_bh(bh);
+	return ERR_PTR(err);
 }
 
 /*
@@ -286,8 +311,15 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 	bitmap_bh = ext4_read_inode_bitmap(sb, block_group);
 	/* Don't bother if the inode bitmap is corrupt. */
 	grp = ext4_get_group_info(sb, block_group);
-	if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) || !bitmap_bh)
+	if (IS_ERR(bitmap_bh)) {
+		fatal = PTR_ERR(bitmap_bh);
+		bitmap_bh = NULL;
 		goto error_return;
+	}
+	if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp))) {
+		fatal = -EFSCORRUPTED;
+		goto error_return;
+	}
 
 	BUFFER_TRACE(bitmap_bh, "get_write_access");
 	fatal = ext4_journal_get_write_access(handle, bitmap_bh);
@@ -721,16 +753,30 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
 	struct ext4_group_desc *gdp = NULL;
 	struct ext4_inode_info *ei;
 	struct ext4_sb_info *sbi;
-	int ret2, err = 0;
+	int ret2, err;
 	struct inode *ret;
 	ext4_group_t i;
 	ext4_group_t flex_group;
 	struct ext4_group_info *grp;
+	int encrypt = 0;
 
 	/* Cannot create files in a deleted directory */
 	if (!dir || !dir->i_nlink)
 		return ERR_PTR(-EPERM);
 
+	if ((ext4_encrypted_inode(dir) ||
+	     DUMMY_ENCRYPTION_ENABLED(EXT4_SB(dir->i_sb))) &&
+	    (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) {
+		err = ext4_get_encryption_info(dir);
+		if (err)
+			return ERR_PTR(err);
+		if (ext4_encryption_info(dir) == NULL)
+			return ERR_PTR(-EPERM);
+		if (!handle)
+			nblocks += EXT4_DATA_TRANS_BLOCKS(dir->i_sb);
+		encrypt = 1;
+	}
+
 	sb = dir->i_sb;
 	ngroups = ext4_get_groups_count(sb);
 	trace_ext4_request_inode(dir, mode);
@@ -755,7 +801,9 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
 		inode->i_gid = dir->i_gid;
 	} else
 		inode_init_owner(inode, dir, mode);
-	dquot_initialize(inode);
+	err = dquot_initialize(inode);
+	if (err)
+		goto out;
 
 	if (!goal)
 		goal = sbi->s_inode_goal;
@@ -810,7 +858,9 @@ got_group:
 		brelse(inode_bitmap_bh);
 		inode_bitmap_bh = ext4_read_inode_bitmap(sb, group);
 		/* Skip groups with suspicious inode tables */
-		if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp) || !inode_bitmap_bh) {
+		if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp) ||
+		    IS_ERR(inode_bitmap_bh)) {
+			inode_bitmap_bh = NULL;
 			if (++group == ngroups)
 				group = 0;
 			continue;
@@ -886,8 +936,8 @@ got:
 		struct buffer_head *block_bitmap_bh;
 
 		block_bitmap_bh = ext4_read_block_bitmap(sb, group);
-		if (!block_bitmap_bh) {
-			err = -EIO;
+		if (IS_ERR(block_bitmap_bh)) {
+			err = PTR_ERR(block_bitmap_bh);
 			goto out;
 		}
 		BUFFER_TRACE(block_bitmap_bh, "get block bitmap access");
@@ -996,12 +1046,6 @@ got:
 	ei->i_block_group = group;
 	ei->i_last_alloc_group = ~0;
 
-	/* If the directory encrypted, then we should encrypt the inode. */
-	if ((S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) &&
-	    (ext4_encrypted_inode(dir) ||
-	     DUMMY_ENCRYPTION_ENABLED(sbi)))
-		ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT);
-
 	ext4_set_inode_flags(inode);
 	if (IS_DIRSYNC(inode))
 		ext4_handle_sync(handle);
@@ -1034,28 +1078,9 @@ got:
 	ext4_set_inode_state(inode, EXT4_STATE_NEW);
 
 	ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize;
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
-	if ((sbi->s_file_encryption_mode == EXT4_ENCRYPTION_MODE_INVALID) &&
-	    (sbi->s_dir_encryption_mode == EXT4_ENCRYPTION_MODE_INVALID)) {
-		ei->i_inline_off = 0;
-		if (EXT4_HAS_INCOMPAT_FEATURE(sb,
-			EXT4_FEATURE_INCOMPAT_INLINE_DATA))
-			ext4_set_inode_state(inode,
-			EXT4_STATE_MAY_INLINE_DATA);
-	} else {
-		/* Inline data and encryption are incompatible
-		 * We turn off inline data since encryption is enabled */
-		ei->i_inline_off = 1;
-		if (EXT4_HAS_INCOMPAT_FEATURE(sb,
-			EXT4_FEATURE_INCOMPAT_INLINE_DATA))
-			ext4_clear_inode_state(inode,
-			EXT4_STATE_MAY_INLINE_DATA);
-	}
-#else
 	ei->i_inline_off = 0;
-	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_INLINE_DATA))
+	if (ext4_has_feature_inline_data(sb))
 		ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
-#endif
 	ret = inode;
 	err = dquot_alloc_inode(inode);
 	if (err)
@@ -1069,7 +1094,7 @@ got:
 	if (err)
 		goto fail_free_drop;
 
-	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+	if (ext4_has_feature_extents(sb)) {
 		/* set extent flag only for directory, file and normal symlink*/
 		if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) {
 			ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS);
@@ -1082,6 +1107,12 @@ got:
 		ei->i_datasync_tid = handle->h_transaction->t_tid;
 	}
 
+	if (encrypt) {
+		err = ext4_inherit_context(dir, inode);
+		if (err)
+			goto fail_free_drop;
+	}
+
 	err = ext4_mark_inode_dirty(handle, inode);
 	if (err) {
 		ext4_std_error(sb, err);
@@ -1119,14 +1150,17 @@ struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino)
 	/* Error cases - e2fsck has already cleaned up for us */
 	if (ino > max_ino) {
 		ext4_warning(sb, "bad orphan ino %lu!  e2fsck was run?", ino);
+		err = -EFSCORRUPTED;
 		goto error;
 	}
 
 	block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
 	bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb);
 	bitmap_bh = ext4_read_inode_bitmap(sb, block_group);
-	if (!bitmap_bh) {
-		ext4_warning(sb, "inode bitmap error for orphan %lu", ino);
+	if (IS_ERR(bitmap_bh)) {
+		err = PTR_ERR(bitmap_bh);
+		ext4_warning(sb, "inode bitmap error %ld for orphan %lu",
+			     ino, err);
 		goto error;
 	}
 
@@ -1201,8 +1235,10 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
 		desc_count += ext4_free_inodes_count(sb, gdp);
 		brelse(bitmap_bh);
 		bitmap_bh = ext4_read_inode_bitmap(sb, i);
-		if (!bitmap_bh)
+		if (IS_ERR(bitmap_bh)) {
+			bitmap_bh = NULL;
 			continue;
+		}
 
 		x = ext4_count_free(bitmap_bh->b_data,
 				    EXT4_INODES_PER_GROUP(sb) / 8);