extents.c (ed7a7e16724a4123fce1fc0ff1f5131a0596f189) extents.c (f86186b44b4164600cce03d0d93ad48ec21fa429)
1/*
2 * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
3 * Written by Alex Tomas <alex@clusterfs.com>
4 *
5 * Architecture independence:
6 * Copyright (c) 2005, Bull S.A.
7 * Written by Pierre Peiffer <pierre.peiffer@bull.net>
8 *

--- 100 unchanged lines hidden (view full) ---

109 }
110 return err;
111}
112
113static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
114 struct ext4_ext_path *path,
115 ext4_lblk_t block)
116{
1/*
2 * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
3 * Written by Alex Tomas <alex@clusterfs.com>
4 *
5 * Architecture independence:
6 * Copyright (c) 2005, Bull S.A.
7 * Written by Pierre Peiffer <pierre.peiffer@bull.net>
8 *

--- 100 unchanged lines hidden (view full) ---

109 }
110 return err;
111}
112
113static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
114 struct ext4_ext_path *path,
115 ext4_lblk_t block)
116{
117 struct ext4_inode_info *ei = EXT4_I(inode);
118 ext4_fsblk_t bg_start;
119 ext4_fsblk_t last_block;
120 ext4_grpblk_t colour;
121 ext4_group_t block_group;
122 int flex_size = ext4_flex_bg_size(EXT4_SB(inode->i_sb));
123 int depth;
124
125 if (path) {
126 struct ext4_extent *ex;
127 depth = path->p_depth;
128
129 /*
130 * Try to predict block placement assuming that we are

--- 25 unchanged lines hidden (view full) ---

156
157 /* it looks like index is empty;
158 * try to find starting block from index itself */
159 if (path[depth].p_bh)
160 return path[depth].p_bh->b_blocknr;
161 }
162
163 /* OK. use inode's group */
117 int depth;
118
119 if (path) {
120 struct ext4_extent *ex;
121 depth = path->p_depth;
122
123 /*
124 * Try to predict block placement assuming that we are

--- 25 unchanged lines hidden (view full) ---

150
151 /* it looks like index is empty;
152 * try to find starting block from index itself */
153 if (path[depth].p_bh)
154 return path[depth].p_bh->b_blocknr;
155 }
156
157 /* OK. use inode's group */
164 block_group = ei->i_block_group;
165 if (flex_size >= EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME) {
166 /*
167 * If there are at least EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME
168 * block groups per flexgroup, reserve the first block
169 * group for directories and special files. Regular
170 * files will start at the second block group. This
171 * tends to speed up directory access and improves
172 * fsck times.
173 */
174 block_group &= ~(flex_size-1);
175 if (S_ISREG(inode->i_mode))
176 block_group++;
177 }
178 bg_start = ext4_group_first_block_no(inode->i_sb, block_group);
179 last_block = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es) - 1;
180
181 /*
182 * If we are doing delayed allocation, we don't need take
183 * colour into account.
184 */
185 if (test_opt(inode->i_sb, DELALLOC))
186 return bg_start;
187
188 if (bg_start + EXT4_BLOCKS_PER_GROUP(inode->i_sb) <= last_block)
189 colour = (current->pid % 16) *
190 (EXT4_BLOCKS_PER_GROUP(inode->i_sb) / 16);
191 else
192 colour = (current->pid % 16) * ((last_block - bg_start) / 16);
193 return bg_start + colour + block;
158 return ext4_inode_to_goal_block(inode);
194}
195
196/*
197 * Allocation for a meta data block
198 */
199static ext4_fsblk_t
200ext4_ext_new_meta_block(handle_t *handle, struct inode *inode,
201 struct ext4_ext_path *path,

--- 4161 unchanged lines hidden --- 		159}
160
161/*
162 * Allocation for a meta data block
163 */
164static ext4_fsblk_t
165ext4_ext_new_meta_block(handle_t *handle, struct inode *inode,
166 struct ext4_ext_path *path,

--- 4161 unchanged lines hidden ---