btrfs: use a btrfs_inode in the log context (struct btrfs_log_ctx)

Instead of using a inode pointer, use a btrfs_inode pointer in the log
context structure, as this is generally what we need and allows for some
internal APIs to take a btrfs_inode instead, making them more consistent
with most of the code base. This will later allow to help to remove a lot
of BTRFS_I() calls in btrfs_sync_file().
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/file.c

@@ -1758,7 +1758,7 @@ static int start_ordered_ops(struct inode *inode, loff_t start, loff_t end)
 
 static inline bool skip_inode_logging(const struct btrfs_log_ctx *ctx)
 {
-	struct btrfs_inode *inode = BTRFS_I(ctx->inode);
+	struct btrfs_inode *inode = ctx->inode;
 	struct btrfs_fs_info *fs_info = inode->root->fs_info;
 
 	if (btrfs_inode_in_log(inode, btrfs_get_fs_generation(fs_info)) &&
@@ -1805,7 +1805,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 
 	trace_btrfs_sync_file(file, datasync);
 
-	btrfs_init_log_ctx(&ctx, inode);
+	btrfs_init_log_ctx(&ctx, BTRFS_I(inode));
 
 	/*
 	 * Always set the range to a full range, otherwise we can get into

fs/btrfs/tree-log.c

@@ -2840,7 +2840,7 @@ static void wait_for_writer(struct btrfs_root *root)
 	finish_wait(&root->log_writer_wait, &wait);
 }
 
-void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct inode *inode)
+void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct btrfs_inode *inode)
 {
 	ctx->log_ret = 0;
 	ctx->log_transid = 0;
@@ -2859,7 +2859,7 @@ void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct inode *inode)
 
 void btrfs_init_log_ctx_scratch_eb(struct btrfs_log_ctx *ctx)
 {
-	struct btrfs_inode *inode = BTRFS_I(ctx->inode);
+	struct btrfs_inode *inode = ctx->inode;
 
 	if (!test_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags) &&
 	    !test_bit(BTRFS_INODE_COPY_EVERYTHING, &inode->runtime_flags))
@@ -2877,7 +2877,7 @@ void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
 	struct btrfs_ordered_extent *ordered;
 	struct btrfs_ordered_extent *tmp;
 
-	ASSERT(inode_is_locked(ctx->inode));
+	ASSERT(inode_is_locked(&ctx->inode->vfs_inode));
 
 	list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
 		list_del_init(&ordered->log_list);
@@ -5930,7 +5930,7 @@ static int copy_inode_items_to_log(struct btrfs_trans_handle *trans,
 			if (ret < 0) {
 				return ret;
 			} else if (ret > 0 &&
-				   other_ino != btrfs_ino(BTRFS_I(ctx->inode))) {
+				   other_ino != btrfs_ino(ctx->inode)) {
 				if (ins_nr > 0) {
 					ins_nr++;
 				} else {
@@ -7588,7 +7588,7 @@ void btrfs_log_new_name(struct btrfs_trans_handle *trans,
 			goto out;
 	}
 
-	btrfs_init_log_ctx(&ctx, &inode->vfs_inode);
+	btrfs_init_log_ctx(&ctx, inode);
 	ctx.logging_new_name = true;
 	btrfs_init_log_ctx_scratch_eb(&ctx);
 	/*

fs/btrfs/tree-log.h

@@ -37,7 +37,7 @@ struct btrfs_log_ctx {
 	bool logging_new_delayed_dentries;
 	/* Indicate if the inode being logged was logged before. */
 	bool logged_before;
-	struct inode *inode;
+	struct btrfs_inode *inode;
 	struct list_head list;
 	/* Only used for fast fsyncs. */
 	struct list_head ordered_extents;
@@ -55,7 +55,7 @@ struct btrfs_log_ctx {
 	struct extent_buffer *scratch_eb;
 };
 
-void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct inode *inode);
+void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct btrfs_inode *inode);
 void btrfs_init_log_ctx_scratch_eb(struct btrfs_log_ctx *ctx);
 void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx);