ext4: trigger the lazy inode table initialization after resize

After we have finished extending the file system, we need to trigger a
the lazy inode table thread to zero out the inode tables.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

4 files changed, 27 insertions, 13 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 8462eb3c33aa..80246237f6d5 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2227,6 +2227,8 @@ extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group,
                                        struct ext4_group_desc *gdp);
 extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group,
                                      struct ext4_group_desc *gdp);
+extern int ext4_register_li_request(struct super_block *sb,
+                                    ext4_group_t first_not_zeroed);
 
 static inline int ext4_has_group_desc_csum(struct super_block *sb)
 {
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 5747f52f7c72..4784ac244fc6 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -313,6 +313,9 @@ mext_out:
                 if (err == 0)
                         err = err2;
                 mnt_drop_write_file(filp);
+                if (!err && ext4_has_group_desc_csum(sb) &&
+                    test_opt(sb, INIT_INODE_TABLE))
+                        err = ext4_register_li_request(sb, input.group);
 group_add_out:
                 ext4_resize_end(sb);
                 return err;
@@ -358,6 +361,7 @@ group_add_out:
                 ext4_fsblk_t n_blocks_count;
                 struct super_block *sb = inode->i_sb;
                 int err = 0, err2 = 0;
+                ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
 
                 if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
                                EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
@@ -388,6 +392,11 @@ group_add_out:
                 if (err == 0)
                         err = err2;
                 mnt_drop_write_file(filp);
+                if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
+                    ext4_has_group_desc_csum(sb) &&
+                    test_opt(sb, INIT_INODE_TABLE))
+                        err = ext4_register_li_request(sb, o_group);
+
 resizefs_out:
                 ext4_resize_end(sb);
                 return err;
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 05f8d4502d42..8eefb636beb8 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1506,10 +1506,12 @@ static int ext4_setup_next_flex_gd(struct super_block *sb,
                 group_data[i].blocks_count = blocks_per_group;
                 overhead = ext4_group_overhead_blocks(sb, group + i);
                 group_data[i].free_blocks_count = blocks_per_group - overhead;
-                if (ext4_has_group_desc_csum(sb))
+                if (ext4_has_group_desc_csum(sb)) {
                         flex_gd->bg_flags[i] = EXT4_BG_BLOCK_UNINIT |
                                                EXT4_BG_INODE_UNINIT;
-                else
+                        if (!test_opt(sb, INIT_INODE_TABLE))
+                                flex_gd->bg_flags[i] |= EXT4_BG_INODE_ZEROED;
+                } else
                         flex_gd->bg_flags[i] = EXT4_BG_INODE_ZEROED;
         }
 
@@ -1594,7 +1596,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
 
         err = ext4_alloc_flex_bg_array(sb, input->group + 1);
         if (err)
-                return err;
+                goto out;
 
         err = ext4_mb_alloc_groupinfo(sb, input->group + 1);
         if (err)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3d4fb81bacd5..c014edd12648 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2776,7 +2776,7 @@ static int ext4_run_li_request(struct ext4_li_request *elr)
                         break;
         }
 
-        if (group == ngroups)
+        if (group >= ngroups)
                 ret = 1;
 
         if (!ret) {
@@ -3016,33 +3016,34 @@ static struct ext4_li_request *ext4_li_request_new(struct super_block *sb,
         return elr;
 }
 
-static int ext4_register_li_request(struct super_block *sb,
-                                    ext4_group_t first_not_zeroed)
+int ext4_register_li_request(struct super_block *sb,
+                             ext4_group_t first_not_zeroed)
 {
         struct ext4_sb_info *sbi = EXT4_SB(sb);
-        struct ext4_li_request *elr;
+        struct ext4_li_request *elr = NULL;
         ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
         int ret = 0;
 
+        mutex_lock(&ext4_li_mtx);
         if (sbi->s_li_request != NULL) {
                 /*
                  * Reset timeout so it can be computed again, because
                  * s_li_wait_mult might have changed.
                  */
                 sbi->s_li_request->lr_timeout = 0;
-                return 0;
+                goto out;
         }
 
         if (first_not_zeroed == ngroups ||
             (sb->s_flags & MS_RDONLY) ||
             !test_opt(sb, INIT_INODE_TABLE))
-                return 0;
+                goto out;
 
         elr = ext4_li_request_new(sb, first_not_zeroed);
-        if (!elr)
-                return -ENOMEM;
-
-        mutex_lock(&ext4_li_mtx);
+        if (!elr) {
+                ret = -ENOMEM;
+                goto out;
+        }
 
         if (NULL == ext4_li_info) {
                 ret = ext4_li_info_new();