56 static int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh,  in gfs2_unstuffer_page()  argument
59 	struct inode *inode = &ip->i_inode;  in gfs2_unstuffer_page()
94 	if (!gfs2_is_jdata(ip))  in gfs2_unstuffer_page()
96 	if (!gfs2_is_writeback(ip))  in gfs2_unstuffer_page()
97 		gfs2_trans_add_data(ip->i_gl, bh);  in gfs2_unstuffer_page()
118 int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)  in gfs2_unstuff_dinode()  argument
123 	int isdir = gfs2_is_dir(ip);  in gfs2_unstuff_dinode()
126 	down_write(&ip->i_rw_mutex);  in gfs2_unstuff_dinode()
128 	error = gfs2_meta_inode_buffer(ip, &dibh);  in gfs2_unstuff_dinode()
132 	if (i_size_read(&ip->i_inode)) {  in gfs2_unstuff_dinode()
137 		error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);  in gfs2_unstuff_dinode()
141 			gfs2_trans_add_unrevoke(GFS2_SB(&ip->i_inode), block, 1);  in gfs2_unstuff_dinode()
142 			error = gfs2_dir_get_new_buffer(ip, block, &bh);  in gfs2_unstuff_dinode()
149 			error = gfs2_unstuffer_page(ip, dibh, block, page);  in gfs2_unstuff_dinode()
157 	gfs2_trans_add_meta(ip->i_gl, dibh);  in gfs2_unstuff_dinode()
161 	if (i_size_read(&ip->i_inode)) {  in gfs2_unstuff_dinode()
163 		gfs2_add_inode_blocks(&ip->i_inode, 1);  in gfs2_unstuff_dinode()
164 		di->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));  in gfs2_unstuff_dinode()
167 	ip->i_height = 1;  in gfs2_unstuff_dinode()
173 	up_write(&ip->i_rw_mutex);  in gfs2_unstuff_dinode()
314 static int lookup_metapath(struct gfs2_inode *ip, struct metapath *mp)  in lookup_metapath()  argument
316 	unsigned int end_of_metadata = ip->i_height - 1;  in lookup_metapath()
328 		ret = gfs2_meta_indirect_buffer(ip, x+1, dblock, &mp->mp_bh[x+1]);  in lookup_metapath()
333 	return ip->i_height;  in lookup_metapath()
383 static inline void bmap_lock(struct gfs2_inode *ip, int create)  in bmap_lock()  argument
386 		down_write(&ip->i_rw_mutex);  in bmap_lock()
388 		down_read(&ip->i_rw_mutex);  in bmap_lock()
391 static inline void bmap_unlock(struct gfs2_inode *ip, int create)  in bmap_unlock()  argument
394 		up_write(&ip->i_rw_mutex);  in bmap_unlock()
396 		up_read(&ip->i_rw_mutex);  in bmap_unlock()
454 	struct gfs2_inode *ip = GFS2_I(inode);  in gfs2_bmap_alloc()  local
472 	gfs2_trans_add_meta(ip->i_gl, dibh);  in gfs2_bmap_alloc()
488 		if (height == ip->i_height) {  in gfs2_bmap_alloc()
495 			iblks = height - ip->i_height;  in gfs2_bmap_alloc()
508 		error = gfs2_alloc_blocks(ip, &bn, &n, 0, NULL);  in gfs2_bmap_alloc()
512 		if (state != ALLOC_DATA || gfs2_is_jdata(ip))  in gfs2_bmap_alloc()
522 			for (; i - 1 < height - ip->i_height && n > 0; i++, n--)  in gfs2_bmap_alloc()
523 				gfs2_indirect_init(mp, ip->i_gl, i, 0, bn++);  in gfs2_bmap_alloc()
524 			if (i - 1 == height - ip->i_height) {  in gfs2_bmap_alloc()
549 				gfs2_trans_add_meta(ip->i_gl, mp->mp_bh[i-1]);  in gfs2_bmap_alloc()
551 				gfs2_indirect_init(mp, ip->i_gl, i,  in gfs2_bmap_alloc()
561 			gfs2_trans_add_meta(ip->i_gl, mp->mp_bh[end_of_metadata]);  in gfs2_bmap_alloc()
580 	ip->i_height = height;  in gfs2_bmap_alloc()
581 	gfs2_add_inode_blocks(&ip->i_inode, alloced);  in gfs2_bmap_alloc()
582 	gfs2_dinode_out(ip, mp->mp_bh[0]->b_data);  in gfs2_bmap_alloc()
606 	struct gfs2_inode *ip = GFS2_I(inode);  in gfs2_block_map()  local
623 	bmap_lock(ip, create);  in gfs2_block_map()
627 	trace_gfs2_bmap(ip, bh_map, lblock, create, 1);  in gfs2_block_map()
628 	if (gfs2_is_dir(ip)) {  in gfs2_block_map()
633 	ret = gfs2_meta_inode_buffer(ip, &mp.mp_bh[0]);  in gfs2_block_map()
637 	height = ip->i_height;  in gfs2_block_map()
643 	if (height > ip->i_height || gfs2_is_stuffed(ip))  in gfs2_block_map()
645 	ret = lookup_metapath(ip, &mp);  in gfs2_block_map()
648 	if (ret != ip->i_height)  in gfs2_block_map()
650 	ptr = metapointer(ip->i_height - 1, &mp);  in gfs2_block_map()
654 	bh = mp.mp_bh[ip->i_height - 1];  in gfs2_block_map()
662 	trace_gfs2_bmap(ip, bh_map, lblock, create, ret);  in gfs2_block_map()
663 	bmap_unlock(ip, create);  in gfs2_block_map()
669 		BUG_ON(gfs2_is_stuffed(ip));  in gfs2_block_map()
716 static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,  in do_strip()  argument
720 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);  in do_strip()
746 	metadata = (height != ip->i_height - 1);  in do_strip()
749 	else if (ip->i_depth)  in do_strip()
766 				gfs2_rlist_add(ip, &rlist, bstart);  in do_strip()
774 		gfs2_rlist_add(ip, &rlist, bstart);  in do_strip()
790 	if (gfs2_rs_active(ip->i_res)) /* needs to be done with the rgrp glock held */  in do_strip()
791 		gfs2_rs_deltree(ip->i_res);  in do_strip()
799 	down_write(&ip->i_rw_mutex);  in do_strip()
801 	gfs2_trans_add_meta(ip->i_gl, dibh);  in do_strip()
802 	gfs2_trans_add_meta(ip->i_gl, bh);  in do_strip()
818 				__gfs2_free_blocks(ip, bstart, blen, metadata);  in do_strip()
827 		gfs2_add_inode_blocks(&ip->i_inode, -1);  in do_strip()
830 		__gfs2_free_blocks(ip, bstart, blen, metadata);  in do_strip()
835 	gfs2_quota_change(ip, -(s64)btotal, ip->i_inode.i_uid,  in do_strip()
836 			  ip->i_inode.i_gid);  in do_strip()
838 	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;  in do_strip()
840 	gfs2_dinode_out(ip, dibh->b_data);  in do_strip()
842 	up_write(&ip->i_rw_mutex);  in do_strip()
870 static int recursive_scan(struct gfs2_inode *ip, struct buffer_head *dibh,  in recursive_scan()  argument
874 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);  in recursive_scan()
882 		error = gfs2_meta_inode_buffer(ip, &bh);  in recursive_scan()
890 		error = gfs2_meta_indirect_buffer(ip, height, block, &bh);  in recursive_scan()
900 	error = do_strip(ip, dibh, bh, top, bottom, height, sm);  in recursive_scan()
904 	if (height < ip->i_height - 1) {  in recursive_scan()
906 		gfs2_metapath_ra(ip->i_gl, bh, top);  in recursive_scan()
914 			error = recursive_scan(ip, dibh, mp, height + 1, bn,  in recursive_scan()
934 	struct gfs2_inode *ip = GFS2_I(inode);  in gfs2_block_truncate_page()  local
985 	if (!gfs2_is_writeback(ip))  in gfs2_block_truncate_page()
986 		gfs2_trans_add_data(ip->i_gl, bh);  in gfs2_block_truncate_page()
1033 	struct gfs2_inode *ip = GFS2_I(inode);  in trunc_start()  local
1037 	int journaled = gfs2_is_jdata(ip);  in trunc_start()
1047 	error = gfs2_meta_inode_buffer(ip, &dibh);  in trunc_start()
1051 	gfs2_trans_add_meta(ip->i_gl, dibh);  in trunc_start()
1053 	if (gfs2_is_stuffed(ip)) {  in trunc_start()
1061 		ip->i_diskflags |= GFS2_DIF_TRUNC_IN_PROG;  in trunc_start()
1065 	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;  in trunc_start()
1066 	gfs2_dinode_out(ip, dibh->b_data);  in trunc_start()
1085 static int trunc_dealloc(struct gfs2_inode *ip, u64 size)  in trunc_dealloc()  argument
1087 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);  in trunc_dealloc()
1088 	unsigned int height = ip->i_height;  in trunc_dealloc()
1098 	find_metapath(sdp, lblock, &mp, ip->i_height);  in trunc_dealloc()
1103 	error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);  in trunc_dealloc()
1112 		error = recursive_scan(ip, NULL, &mp, 0, 0, 1, &sm);  in trunc_dealloc()
1117 	gfs2_quota_unhold(ip);  in trunc_dealloc()
1122 static int trunc_end(struct gfs2_inode *ip)  in trunc_end()  argument
1124 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);  in trunc_end()
1132 	down_write(&ip->i_rw_mutex);  in trunc_end()
1134 	error = gfs2_meta_inode_buffer(ip, &dibh);  in trunc_end()
1138 	if (!i_size_read(&ip->i_inode)) {  in trunc_end()
1139 		ip->i_height = 0;  in trunc_end()
1140 		ip->i_goal = ip->i_no_addr;  in trunc_end()
1142 		gfs2_ordered_del_inode(ip);  in trunc_end()
1144 	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;  in trunc_end()
1145 	ip->i_diskflags &= ~GFS2_DIF_TRUNC_IN_PROG;  in trunc_end()
1147 	gfs2_trans_add_meta(ip->i_gl, dibh);  in trunc_end()
1148 	gfs2_dinode_out(ip, dibh->b_data);  in trunc_end()
1152 	up_write(&ip->i_rw_mutex);  in trunc_end()
1171 	struct gfs2_inode *ip = GFS2_I(inode);  in do_shrink()  local
1177 	if (gfs2_is_stuffed(ip))  in do_shrink()
1180 	error = trunc_dealloc(ip, newsize);  in do_shrink()
1182 		error = trunc_end(ip);  in do_shrink()
1218 	struct gfs2_inode *ip = GFS2_I(inode);  in do_grow()  local
1225 	if (gfs2_is_stuffed(ip) &&  in do_grow()
1227 		error = gfs2_quota_lock_check(ip, &ap);  in do_grow()
1231 		error = gfs2_inplace_reserve(ip, &ap);  in do_grow()
1244 		error = gfs2_unstuff_dinode(ip, NULL);  in do_grow()
1249 	error = gfs2_meta_inode_buffer(ip, &dibh);  in do_grow()
1254 	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;  in do_grow()
1255 	gfs2_trans_add_meta(ip->i_gl, dibh);  in do_grow()
1256 	gfs2_dinode_out(ip, dibh->b_data);  in do_grow()
1263 		gfs2_inplace_release(ip);  in do_grow()
1265 		gfs2_quota_unlock(ip);  in do_grow()
1284 	struct gfs2_inode *ip = GFS2_I(inode);  in gfs2_setattr_size()  local
1300 	ret = gfs2_rs_alloc(ip);  in gfs2_setattr_size()
1310 	gfs2_rs_deltree(ip->i_res);  in gfs2_setattr_size()
1317 int gfs2_truncatei_resume(struct gfs2_inode *ip)  in gfs2_truncatei_resume()  argument
1320 	error = trunc_dealloc(ip, i_size_read(&ip->i_inode));  in gfs2_truncatei_resume()
1322 		error = trunc_end(ip);  in gfs2_truncatei_resume()
1326 int gfs2_file_dealloc(struct gfs2_inode *ip)  in gfs2_file_dealloc()  argument
1328 	return trunc_dealloc(ip, 0);  in gfs2_file_dealloc()
1405 	struct gfs2_inode *ip = GFS2_I(jd->jd_inode);  in gfs2_map_journal_extents()  local
1427 		lblock += (bh.b_size >> ip->i_inode.i_blkbits);  in gfs2_map_journal_extents()
1455 int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,  in gfs2_write_alloc_required()  argument
1458 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);  in gfs2_write_alloc_required()
1467 	if (gfs2_is_stuffed(ip)) {  in gfs2_write_alloc_required()
1475 	BUG_ON(gfs2_is_dir(ip));  in gfs2_write_alloc_required()
1476 	end_of_file = (i_size_read(&ip->i_inode) + sdp->sd_sb.sb_bsize - 1) >> shift;  in gfs2_write_alloc_required()
1486 		gfs2_block_map(&ip->i_inode, lblock, &bh, 0);  in gfs2_write_alloc_required()
1490 		lblock += (bh.b_size >> ip->i_inode.i_blkbits);  in gfs2_write_alloc_required()