@@ -3848,16 +3848,34 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount2;
}
}
+
+ /*
+ * set up enough so that it can read an inode
+ */
+ if (!test_opt(sb, NOLOAD) &&
+ EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
+ sb->s_op = &ext4_sops;
+ else
+ sb->s_op = &ext4_nojournal_sops;
+
+ ext4_ext_init(sb);
+ err = ext4_mb_init(sb);
+ if (err) {
+ ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)",
+ err);
+ goto failed_mount2;
+ }
+
if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
- goto failed_mount2;
+ goto failed_mount2a;
}
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG))
if (!ext4_fill_flex_info(sb)) {
ext4_msg(sb, KERN_ERR,
"unable to initialize "
"flex_bg meta info!");
- goto failed_mount2;
+ goto failed_mount2a;
}
sbi->s_gdb_count = db_count;
@@ -3895,14 +3913,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_stripe = ext4_get_stripe_size(sbi);
sbi->s_extent_max_zeroout_kb = 32;
- /*
- * set up enough so that it can read an inode
- */
- if (!test_opt(sb, NOLOAD) &&
- EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
- sb->s_op = &ext4_sops;
- else
- sb->s_op = &ext4_nojournal_sops;
sb->s_export_op = &ext4_export_ops;
sb->s_xattr = ext4_xattr_handlers;
#ifdef CONFIG_QUOTA
@@ -4094,14 +4104,6 @@ no_journal:
goto failed_mount4a;
}
- ext4_ext_init(sb);
- err = ext4_mb_init(sb);
- if (err) {
- ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)",
- err);
- goto failed_mount5;
- }
-
err = ext4_register_li_request(sb, first_not_zeroed);
if (err)
goto failed_mount6;
@@ -4175,9 +4177,6 @@ failed_mount8:
failed_mount7:
ext4_unregister_li_request(sb);
failed_mount6:
- ext4_mb_release(sb);
-failed_mount5:
- ext4_ext_release(sb);
ext4_release_system_zone(sb);
failed_mount4a:
dput(sb->s_root);
@@ -4203,11 +4202,14 @@ failed_mount3:
percpu_counter_destroy(&sbi->s_extent_cache_cnt);
if (sbi->s_mmp_tsk)
kthread_stop(sbi->s_mmp_tsk);
+failed_mount2a:
+ ext4_mb_release(sb);
failed_mount2:
for (i = 0; i < db_count; i++)
brelse(sbi->s_group_desc[i]);
ext4_kvfree(sbi->s_group_desc);
failed_mount:
+ ext4_ext_release(sb);
if (sbi->s_chksum_driver)
crypto_free_shash(sbi->s_chksum_driver);
if (sbi->s_proc) {
With EXT4FS_DEBUG ext4_count_free_clusters() will call ext4_read_block_bitmap() without s_group_info initialized, so we need to initialize multi-block allocator before. And we can't initialize multi-block allocator without group descriptors, since it use them. Also we need to install s_op before initializing multi-block allocator, because in ext4_mb_init_backend() new inode is created. Here is bt: (gdb) bt #0 ext4_get_group_info (group=0, sb=0xffff880079a10000) at ext4.h:2430 #1 ext4_validate_block_bitmap (sb=sb@entry=0xffff880079a10000, desc=desc@entry=0xffff880056510000, block_group=block_group@entry=0, bh=bh@entry=0xffff88007bf2b2d8) at balloc.c:358 #2 0xffffffff81232202 in ext4_wait_block_bitmap (sb=sb@entry=0xffff880079a10000, block_group=block_group@entry=0, bh=bh@entry=0xffff88007bf2b2d8) at balloc.c:476 #3 0xffffffff81232eaf in ext4_read_block_bitmap (sb=sb@entry=0xffff880079a10000, block_group=block_group@entry=0) at balloc.c:489 #4 0xffffffff81232fc0 in ext4_count_free_clusters (sb=sb@entry=0xffff880079a10000) at balloc.c:665 #5 0xffffffff81259ffa in ext4_check_descriptors (first_not_zeroed=<synthetic pointer>, sb=0xffff880079a10000) at super.c:2143 #6 ext4_fill_super (sb=sb@entry=0xffff880079a10000, data=<optimized out>, data@entry=0x0 <irq_stack_union>, silent=silent@entry=0) at super.c:3851 #7 0xffffffff811b8340 in mount_bdev (fs_type=<optimized out>, flags=0, dev_name=<optimized out>, data=0x0 <irq_stack_union>, fill_super=fill_super@entry=0xffffffff812589c0 <ext4_fill_super>) at super.c:987 #8 0xffffffff8124ec35 in ext4_mount (fs_type=<optimized out>, flags=<optimized out>, dev_name=<optimized out>, data=<optimized out>) at super.c:5365 #9 0xffffffff811b8cf9 in mount_fs (type=type@entry=0xffffffff81c71840 <ext4_fs_type>, flags=flags@entry=0, name=name@entry=0xffff880077a80c70 "/dev/loop4", data=data@entry=0x0 <irq_stack_union>) at super.c:1090 #10 0xffffffff811d2ff3 in vfs_kern_mount (type=type@entry=0xffffffff81c71840 <ext4_fs_type>, flags=0, name=name@entry=0xffff880077a80c70 "/dev/loop4", data=data@entry=0x0 <irq_stack_union>) at namespace.c:813 #11 0xffffffff811d55de in do_new_mount (data=0x0 <irq_stack_union>, name=0xffff880077a80c70 "/dev/loop4", mnt_flags=32, flags=<optimized out>, fstype=0xffff880077a80ca0 "ext4-insane", path=0xffff88007a5b1ed0) at namespace.c:2068 #12 do_mount (dev_name=0xffff880077a80c70 "/dev/loop4", dir_name=<optimized out>, type_page=0xffff880077a80ca0 "ext4-insane", flags=<optimized out>, flags@entry=3236757504, data_page=0x0 <irq_stack_union>) at namespace.c:2392 #13 0xffffffff811d6183 in SYSC_mount (data=0x0 <irq_stack_union>, flags=3236757504, type=<optimized out>, dir_name=<optimized out>, dev_name=0x7ffad9649c20 "/dev/loop4") at namespace.c:2586 #14 SyS_mount (dev_name=140715365800992, dir_name=<optimized out>, type=<optimized out>, flags=3236757504, data=0) at namespace.c:2559 Signed-off-by: Azat Khuzhin <a3at.mail@gmail.com> --- v2: ext4: initialize multi-block allocator after group descriptors loaded v3: ext4: set s_op before initializing multi-block allocator fs/ext4/super.c | 44 +++++++++++++++++++++++--------------------- 1 file changed, 23 insertions(+), 21 deletions(-)