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Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c539
1 files changed, 283 insertions, 256 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f43e526112ae..05fcecc36244 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1048,6 +1048,8 @@ void ext4_mark_group_bitmap_corrupted(struct super_block *sb,
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL);
int ret;
+ if (!grp || !gdp)
+ return;
if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) {
ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT,
&grp->bb_state);
@@ -1183,14 +1185,83 @@ static inline void ext4_quota_off_umount(struct super_block *sb)
}
#endif
+static int ext4_percpu_param_init(struct ext4_sb_info *sbi)
+{
+ ext4_fsblk_t block;
+ int err;
+
+ block = ext4_count_free_clusters(sbi->s_sb);
+ ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block));
+ err = percpu_counter_init(&sbi->s_freeclusters_counter, block,
+ GFP_KERNEL);
+ if (!err) {
+ unsigned long freei = ext4_count_free_inodes(sbi->s_sb);
+ sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);
+ err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,
+ GFP_KERNEL);
+ }
+ if (!err)
+ err = percpu_counter_init(&sbi->s_dirs_counter,
+ ext4_count_dirs(sbi->s_sb), GFP_KERNEL);
+ if (!err)
+ err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,
+ GFP_KERNEL);
+ if (!err)
+ err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0,
+ GFP_KERNEL);
+ if (!err)
+ err = percpu_init_rwsem(&sbi->s_writepages_rwsem);
+
+ if (err)
+ ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory");
+
+ return err;
+}
+
+static void ext4_percpu_param_destroy(struct ext4_sb_info *sbi)
+{
+ percpu_counter_destroy(&sbi->s_freeclusters_counter);
+ percpu_counter_destroy(&sbi->s_freeinodes_counter);
+ percpu_counter_destroy(&sbi->s_dirs_counter);
+ percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
+ percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit);
+ percpu_free_rwsem(&sbi->s_writepages_rwsem);
+}
+
+static void ext4_group_desc_free(struct ext4_sb_info *sbi)
+{
+ struct buffer_head **group_desc;
+ int i;
+
+ rcu_read_lock();
+ group_desc = rcu_dereference(sbi->s_group_desc);
+ for (i = 0; i < sbi->s_gdb_count; i++)
+ brelse(group_desc[i]);
+ kvfree(group_desc);
+ rcu_read_unlock();
+}
+
+static void ext4_flex_groups_free(struct ext4_sb_info *sbi)
+{
+ struct flex_groups **flex_groups;
+ int i;
+
+ rcu_read_lock();
+ flex_groups = rcu_dereference(sbi->s_flex_groups);
+ if (flex_groups) {
+ for (i = 0; i < sbi->s_flex_groups_allocated; i++)
+ kvfree(flex_groups[i]);
+ kvfree(flex_groups);
+ }
+ rcu_read_unlock();
+}
+
static void ext4_put_super(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
- struct buffer_head **group_desc;
- struct flex_groups **flex_groups;
int aborted = 0;
- int i, err;
+ int err;
/*
* Unregister sysfs before destroying jbd2 journal.
@@ -1238,26 +1309,11 @@ static void ext4_put_super(struct super_block *sb)
if (!sb_rdonly(sb))
ext4_commit_super(sb);
- rcu_read_lock();
- group_desc = rcu_dereference(sbi->s_group_desc);
- for (i = 0; i < sbi->s_gdb_count; i++)
- brelse(group_desc[i]);
- kvfree(group_desc);
- flex_groups = rcu_dereference(sbi->s_flex_groups);
- if (flex_groups) {
- for (i = 0; i < sbi->s_flex_groups_allocated; i++)
- kvfree(flex_groups[i]);
- kvfree(flex_groups);
- }
- rcu_read_unlock();
- percpu_counter_destroy(&sbi->s_freeclusters_counter);
- percpu_counter_destroy(&sbi->s_freeinodes_counter);
- percpu_counter_destroy(&sbi->s_dirs_counter);
- percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
- percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit);
- percpu_free_rwsem(&sbi->s_writepages_rwsem);
+ ext4_group_desc_free(sbi);
+ ext4_flex_groups_free(sbi);
+ ext4_percpu_param_destroy(sbi);
#ifdef CONFIG_QUOTA
- for (i = 0; i < EXT4_MAXQUOTAS; i++)
+ for (int i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(get_qf_name(sb, sbi, i));
#endif
@@ -1325,9 +1381,9 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
inode_set_iversion(&ei->vfs_inode, 1);
ei->i_flags = 0;
spin_lock_init(&ei->i_raw_lock);
- INIT_LIST_HEAD(&ei->i_prealloc_list);
+ ei->i_prealloc_node = RB_ROOT;
atomic_set(&ei->i_prealloc_active, 0);
- spin_lock_init(&ei->i_prealloc_lock);
+ rwlock_init(&ei->i_prealloc_lock);
ext4_es_init_tree(&ei->i_es_tree);
rwlock_init(&ei->i_es_lock);
INIT_LIST_HEAD(&ei->i_es_list);
@@ -2500,7 +2556,7 @@ static void ext4_apply_quota_options(struct fs_context *fc,
qname = rcu_replace_pointer(sbi->s_qf_names[i], qname,
lockdep_is_held(&sb->s_umount));
if (qname)
- kfree_rcu(qname);
+ kfree_rcu_mightsleep(qname);
}
}
@@ -3184,11 +3240,9 @@ static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group,
crc = crc16(crc, (__u8 *)gdp, offset);
offset += sizeof(gdp->bg_checksum); /* skip checksum */
/* for checksum of struct ext4_group_desc do the rest...*/
- if (ext4_has_feature_64bit(sb) &&
- offset < le16_to_cpu(sbi->s_es->s_desc_size))
+ if (ext4_has_feature_64bit(sb) && offset < sbi->s_desc_size)
crc = crc16(crc, (__u8 *)gdp + offset,
- le16_to_cpu(sbi->s_es->s_desc_size) -
- offset);
+ sbi->s_desc_size - offset);
out:
return cpu_to_le16(crc);
@@ -4587,6 +4641,8 @@ static int ext4_check_feature_compatibility(struct super_block *sb,
struct ext4_super_block *es,
int silent)
{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV &&
(ext4_has_compat_features(sb) ||
ext4_has_ro_compat_features(sb) ||
@@ -4656,14 +4712,59 @@ static int ext4_check_feature_compatibility(struct super_block *sb,
if (!ext4_feature_set_ok(sb, (sb_rdonly(sb))))
return -EINVAL;
+ if (sbi->s_daxdev) {
+ if (sb->s_blocksize == PAGE_SIZE)
+ set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);
+ else
+ ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n");
+ }
+
+ if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {
+ if (ext4_has_feature_inline_data(sb)) {
+ ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem"
+ " that may contain inline data");
+ return -EINVAL;
+ }
+ if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) {
+ ext4_msg(sb, KERN_ERR,
+ "DAX unsupported by block device.");
+ return -EINVAL;
+ }
+ }
+
+ if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {
+ ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d",
+ es->s_encryption_level);
+ return -EINVAL;
+ }
+
return 0;
}
-static int ext4_geometry_check(struct super_block *sb,
+static int ext4_check_geometry(struct super_block *sb,
struct ext4_super_block *es)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
__u64 blocks_count;
+ int err;
+
+ if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) {
+ ext4_msg(sb, KERN_ERR,
+ "Number of reserved GDT blocks insanely large: %d",
+ le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks));
+ return -EINVAL;
+ }
+ /*
+ * Test whether we have more sectors than will fit in sector_t,
+ * and whether the max offset is addressable by the page cache.
+ */
+ err = generic_check_addressable(sb->s_blocksize_bits,
+ ext4_blocks_count(es));
+ if (err) {
+ ext4_msg(sb, KERN_ERR, "filesystem"
+ " too large to mount safely on this system");
+ return err;
+ }
/* check blocks count against device size */
blocks_count = sb_bdev_nr_blocks(sb);
@@ -4719,19 +4820,6 @@ static int ext4_geometry_check(struct super_block *sb,
return 0;
}
-static void ext4_group_desc_free(struct ext4_sb_info *sbi)
-{
- struct buffer_head **group_desc;
- int i;
-
- rcu_read_lock();
- group_desc = rcu_dereference(sbi->s_group_desc);
- for (i = 0; i < sbi->s_gdb_count; i++)
- brelse(group_desc[i]);
- kvfree(group_desc);
- rcu_read_unlock();
-}
-
static int ext4_group_desc_init(struct super_block *sb,
struct ext4_super_block *es,
ext4_fsblk_t logical_sb_block,
@@ -4881,7 +4969,7 @@ out:
return -EINVAL;
}
-static int ext4_journal_data_mode_check(struct super_block *sb)
+static int ext4_check_journal_data_mode(struct super_block *sb)
{
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with "
@@ -5024,18 +5112,92 @@ out:
return ret;
}
+static void ext4_hash_info_init(struct super_block *sb)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct ext4_super_block *es = sbi->s_es;
+ unsigned int i;
+
+ for (i = 0; i < 4; i++)
+ sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
+
+ sbi->s_def_hash_version = es->s_def_hash_version;
+ if (ext4_has_feature_dir_index(sb)) {
+ i = le32_to_cpu(es->s_flags);
+ if (i & EXT2_FLAGS_UNSIGNED_HASH)
+ sbi->s_hash_unsigned = 3;
+ else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
+#ifdef __CHAR_UNSIGNED__
+ if (!sb_rdonly(sb))
+ es->s_flags |=
+ cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
+ sbi->s_hash_unsigned = 3;
+#else
+ if (!sb_rdonly(sb))
+ es->s_flags |=
+ cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
+#endif
+ }
+ }
+}
+
+static int ext4_block_group_meta_init(struct super_block *sb, int silent)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct ext4_super_block *es = sbi->s_es;
+ int has_huge_files;
+
+ has_huge_files = ext4_has_feature_huge_file(sb);
+ sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits,
+ has_huge_files);
+ sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files);
+
+ sbi->s_desc_size = le16_to_cpu(es->s_desc_size);
+ if (ext4_has_feature_64bit(sb)) {
+ if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||
+ sbi->s_desc_size > EXT4_MAX_DESC_SIZE ||
+ !is_power_of_2(sbi->s_desc_size)) {
+ ext4_msg(sb, KERN_ERR,
+ "unsupported descriptor size %lu",
+ sbi->s_desc_size);
+ return -EINVAL;
+ }
+ } else
+ sbi->s_desc_size = EXT4_MIN_DESC_SIZE;
+
+ sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
+ sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
+
+ sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb);
+ if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) {
+ if (!silent)
+ ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
+ return -EINVAL;
+ }
+ if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||
+ sbi->s_inodes_per_group > sb->s_blocksize * 8) {
+ ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n",
+ sbi->s_inodes_per_group);
+ return -EINVAL;
+ }
+ sbi->s_itb_per_group = sbi->s_inodes_per_group /
+ sbi->s_inodes_per_block;
+ sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb);
+ sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY;
+ sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));
+ sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));
+
+ return 0;
+}
+
static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
{
struct ext4_super_block *es = NULL;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- struct flex_groups **flex_groups;
- ext4_fsblk_t block;
ext4_fsblk_t logical_sb_block;
struct inode *root;
- int ret = -ENOMEM;
- unsigned int i;
- int needs_recovery, has_huge_files;
- int err = 0;
+ int needs_recovery;
+ int err;
ext4_group_t first_not_zeroed;
struct ext4_fs_context *ctx = fc->fs_private;
int silent = fc->sb_flags & SB_SILENT;
@@ -5048,8 +5210,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
sbi->s_sectors_written_start =
part_stat_read(sb->s_bdev, sectors[STAT_WRITE]);
- /* -EINVAL is default */
- ret = -EINVAL;
err = ext4_load_super(sb, &logical_sb_block, silent);
if (err)
goto out_fail;
@@ -5075,7 +5235,8 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
*/
sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT;
- if (ext4_inode_info_init(sb, es))
+ err = ext4_inode_info_init(sb, es);
+ if (err)
goto failed_mount;
err = parse_apply_sb_mount_options(sb, ctx);
@@ -5091,10 +5252,12 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
ext4_apply_options(fc, sb);
- if (ext4_encoding_init(sb, es))
+ err = ext4_encoding_init(sb, es);
+ if (err)
goto failed_mount;
- if (ext4_journal_data_mode_check(sb))
+ err = ext4_check_journal_data_mode(sb);
+ if (err)
goto failed_mount;
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
@@ -5103,119 +5266,22 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
/* i_version is always enabled now */
sb->s_flags |= SB_I_VERSION;
- if (ext4_check_feature_compatibility(sb, es, silent))
- goto failed_mount;
-
- if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) {
- ext4_msg(sb, KERN_ERR,
- "Number of reserved GDT blocks insanely large: %d",
- le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks));
- goto failed_mount;
- }
-
- if (sbi->s_daxdev) {
- if (sb->s_blocksize == PAGE_SIZE)
- set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);
- else
- ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n");
- }
-
- if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {
- if (ext4_has_feature_inline_data(sb)) {
- ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem"
- " that may contain inline data");
- goto failed_mount;
- }
- if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) {
- ext4_msg(sb, KERN_ERR,
- "DAX unsupported by block device.");
- goto failed_mount;
- }
- }
-
- if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {
- ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d",
- es->s_encryption_level);
+ err = ext4_check_feature_compatibility(sb, es, silent);
+ if (err)
goto failed_mount;
- }
- has_huge_files = ext4_has_feature_huge_file(sb);
- sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits,
- has_huge_files);
- sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files);
-
- sbi->s_desc_size = le16_to_cpu(es->s_desc_size);
- if (ext4_has_feature_64bit(sb)) {
- if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||
- sbi->s_desc_size > EXT4_MAX_DESC_SIZE ||
- !is_power_of_2(sbi->s_desc_size)) {
- ext4_msg(sb, KERN_ERR,
- "unsupported descriptor size %lu",
- sbi->s_desc_size);
- goto failed_mount;
- }
- } else
- sbi->s_desc_size = EXT4_MIN_DESC_SIZE;
-
- sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
- sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
-
- sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb);
- if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) {
- if (!silent)
- ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
- goto failed_mount;
- }
- if (sbi->s_inodes_per_group < sbi->s_inodes_per_block ||
- sbi->s_inodes_per_group > sb->s_blocksize * 8) {
- ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n",
- sbi->s_inodes_per_group);
+ err = ext4_block_group_meta_init(sb, silent);
+ if (err)
goto failed_mount;
- }
- sbi->s_itb_per_group = sbi->s_inodes_per_group /
- sbi->s_inodes_per_block;
- sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb);
- sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY;
- sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb));
- sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb));
-
- for (i = 0; i < 4; i++)
- sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
- sbi->s_def_hash_version = es->s_def_hash_version;
- if (ext4_has_feature_dir_index(sb)) {
- i = le32_to_cpu(es->s_flags);
- if (i & EXT2_FLAGS_UNSIGNED_HASH)
- sbi->s_hash_unsigned = 3;
- else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
-#ifdef __CHAR_UNSIGNED__
- if (!sb_rdonly(sb))
- es->s_flags |=
- cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
- sbi->s_hash_unsigned = 3;
-#else
- if (!sb_rdonly(sb))
- es->s_flags |=
- cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
-#endif
- }
- }
- if (ext4_handle_clustersize(sb))
- goto failed_mount;
+ ext4_hash_info_init(sb);
- /*
- * Test whether we have more sectors than will fit in sector_t,
- * and whether the max offset is addressable by the page cache.
- */
- err = generic_check_addressable(sb->s_blocksize_bits,
- ext4_blocks_count(es));
- if (err) {
- ext4_msg(sb, KERN_ERR, "filesystem"
- " too large to mount safely on this system");
+ err = ext4_handle_clustersize(sb);
+ if (err)
goto failed_mount;
- }
- if (ext4_geometry_check(sb, es))
+ err = ext4_check_geometry(sb, es);
+ if (err)
goto failed_mount;
timer_setup(&sbi->s_err_report, print_daily_error_info, 0);
@@ -5226,8 +5292,8 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
if (err)
goto failed_mount3;
- /* Register extent status tree shrinker */
- if (ext4_es_register_shrinker(sbi))
+ err = ext4_es_register_shrinker(sbi);
+ if (err)
goto failed_mount3;
sbi->s_stripe = ext4_get_stripe_size(sbi);
@@ -5266,10 +5332,13 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
ext4_has_feature_orphan_present(sb) ||
ext4_has_feature_journal_needs_recovery(sb));
- if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb))
- if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block)))
+ if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) {
+ err = ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block));
+ if (err)
goto failed_mount3a;
+ }
+ err = -EINVAL;
/*
* The first inode we look at is the journal inode. Don't try
* root first: it may be modified in the journal!
@@ -5321,6 +5390,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
if (!sbi->s_ea_block_cache) {
ext4_msg(sb, KERN_ERR,
"Failed to create ea_block_cache");
+ err = -EINVAL;
goto failed_mount_wq;
}
@@ -5329,6 +5399,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
if (!sbi->s_ea_inode_cache) {
ext4_msg(sb, KERN_ERR,
"Failed to create ea_inode_cache");
+ err = -EINVAL;
goto failed_mount_wq;
}
}
@@ -5363,7 +5434,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
if (!EXT4_SB(sb)->rsv_conversion_wq) {
printk(KERN_ERR "EXT4-fs: failed to create workqueue\n");
- ret = -ENOMEM;
+ err = -ENOMEM;
goto failed_mount4;
}
@@ -5375,28 +5446,28 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL);
if (IS_ERR(root)) {
ext4_msg(sb, KERN_ERR, "get root inode failed");
- ret = PTR_ERR(root);
+ err = PTR_ERR(root);
root = NULL;
goto failed_mount4;
}
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck");
iput(root);
+ err = -EFSCORRUPTED;
goto failed_mount4;
}
sb->s_root = d_make_root(root);
if (!sb->s_root) {
ext4_msg(sb, KERN_ERR, "get root dentry failed");
- ret = -ENOMEM;
+ err = -ENOMEM;
goto failed_mount4;
}
- ret = ext4_setup_super(sb, es, sb_rdonly(sb));
- if (ret == -EROFS) {
+ err = ext4_setup_super(sb, es, sb_rdonly(sb));
+ if (err == -EROFS) {
sb->s_flags |= SB_RDONLY;
- ret = 0;
- } else if (ret)
+ } else if (err)
goto failed_mount4a;
ext4_set_resv_clusters(sb);
@@ -5440,40 +5511,16 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
sbi->s_journal->j_commit_callback =
ext4_journal_commit_callback;
- block = ext4_count_free_clusters(sb);
- ext4_free_blocks_count_set(sbi->s_es,
- EXT4_C2B(sbi, block));
- err = percpu_counter_init(&sbi->s_freeclusters_counter, block,
- GFP_KERNEL);
- if (!err) {
- unsigned long freei = ext4_count_free_inodes(sb);
- sbi->s_es->s_free_inodes_count = cpu_to_le32(freei);
- err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,
- GFP_KERNEL);
- }
- if (!err)
- err = percpu_counter_init(&sbi->s_dirs_counter,
- ext4_count_dirs(sb), GFP_KERNEL);
- if (!err)
- err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0,
- GFP_KERNEL);
- if (!err)
- err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0,
- GFP_KERNEL);
- if (!err)
- err = percpu_init_rwsem(&sbi->s_writepages_rwsem);
-
- if (err) {
- ext4_msg(sb, KERN_ERR, "insufficient memory");
+ err = ext4_percpu_param_init(sbi);
+ if (err)
goto failed_mount6;
- }
if (ext4_has_feature_flex_bg(sb))
if (!ext4_fill_flex_info(sb)) {
ext4_msg(sb, KERN_ERR,
"unable to initialize "
"flex_bg meta info!");
- ret = -ENOMEM;
+ err = -ENOMEM;
goto failed_mount6;
}
@@ -5548,20 +5595,8 @@ failed_mount7:
ext4_unregister_li_request(sb);
failed_mount6:
ext4_mb_release(sb);
- rcu_read_lock();
- flex_groups = rcu_dereference(sbi->s_flex_groups);
- if (flex_groups) {
- for (i = 0; i < sbi->s_flex_groups_allocated; i++)
- kvfree(flex_groups[i]);
- kvfree(flex_groups);
- }
- rcu_read_unlock();
- percpu_counter_destroy(&sbi->s_freeclusters_counter);
- percpu_counter_destroy(&sbi->s_freeinodes_counter);
- percpu_counter_destroy(&sbi->s_dirs_counter);
- percpu_counter_destroy(&sbi->s_dirtyclusters_counter);
- percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit);
- percpu_free_rwsem(&sbi->s_writepages_rwsem);
+ ext4_flex_groups_free(sbi);
+ ext4_percpu_param_destroy(sbi);
failed_mount5:
ext4_ext_release(sb);
ext4_release_system_zone(sb);
@@ -5602,7 +5637,7 @@ failed_mount:
#endif
#ifdef CONFIG_QUOTA
- for (i = 0; i < EXT4_MAXQUOTAS; i++)
+ for (unsigned int i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(get_qf_name(sb, sbi, i));
#endif
fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy);
@@ -5611,7 +5646,7 @@ failed_mount:
ext4_blkdev_remove(sbi);
out_fail:
sb->s_fs_info = NULL;
- return err ? err : ret;
+ return err;
}
static int ext4_fill_super(struct super_block *sb, struct fs_context *fc)
@@ -5649,8 +5684,9 @@ static int ext4_fill_super(struct super_block *sb, struct fs_context *fc)
descr = "out journal";
if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount"))
- ext4_msg(sb, KERN_INFO, "mounted filesystem %pU with%s. "
- "Quota mode: %s.", &sb->s_uuid, descr,
+ ext4_msg(sb, KERN_INFO, "mounted filesystem %pU %s with%s. "
+ "Quota mode: %s.", &sb->s_uuid,
+ sb_rdonly(sb) ? "ro" : "r/w", descr,
ext4_quota_mode(sb));
/* Update the s_overhead_clusters if necessary */
@@ -6539,12 +6575,12 @@ static int __ext4_remount(struct fs_context *fc, struct super_block *sb)
goto restore_opts;
sb->s_flags &= ~SB_RDONLY;
- if (ext4_has_feature_mmp(sb))
- if (ext4_multi_mount_protect(sb,
- le64_to_cpu(es->s_mmp_block))) {
- err = -EROFS;
+ if (ext4_has_feature_mmp(sb)) {
+ err = ext4_multi_mount_protect(sb,
+ le64_to_cpu(es->s_mmp_block));
+ if (err)
goto restore_opts;
- }
+ }
#ifdef CONFIG_QUOTA
enable_quota = 1;
#endif
@@ -6552,18 +6588,6 @@ static int __ext4_remount(struct fs_context *fc, struct super_block *sb)
}
/*
- * Reinitialize lazy itable initialization thread based on
- * current settings
- */
- if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE))
- ext4_unregister_li_request(sb);
- else {
- ext4_group_t first_not_zeroed;
- first_not_zeroed = ext4_has_uninit_itable(sb);
- ext4_register_li_request(sb, first_not_zeroed);
- }
-
- /*
* Handle creation of system zone data early because it can fail.
* Releasing of existing data is done when we are sure remount will
* succeed.
@@ -6581,9 +6605,6 @@ static int __ext4_remount(struct fs_context *fc, struct super_block *sb)
}
#ifdef CONFIG_QUOTA
- /* Release old quota file names */
- for (i = 0; i < EXT4_MAXQUOTAS; i++)
- kfree(old_opts.s_qf_names[i]);
if (enable_quota) {
if (sb_any_quota_suspended(sb))
dquot_resume(sb, -1);
@@ -6593,16 +6614,38 @@ static int __ext4_remount(struct fs_context *fc, struct super_block *sb)
goto restore_opts;
}
}
+ /* Release old quota file names */
+ for (i = 0; i < EXT4_MAXQUOTAS; i++)
+ kfree(old_opts.s_qf_names[i]);
#endif
if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)
ext4_release_system_zone(sb);
+ /*
+ * Reinitialize lazy itable initialization thread based on
+ * current settings
+ */
+ if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE))
+ ext4_unregister_li_request(sb);
+ else {
+ ext4_group_t first_not_zeroed;
+ first_not_zeroed = ext4_has_uninit_itable(sb);
+ ext4_register_li_request(sb, first_not_zeroed);
+ }
+
if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb))
ext4_stop_mmpd(sbi);
return 0;
restore_opts:
+ /*
+ * If there was a failing r/w to ro transition, we may need to
+ * re-enable quota
+ */
+ if ((sb->s_flags & SB_RDONLY) && !(old_sb_flags & SB_RDONLY) &&
+ sb_any_quota_suspended(sb))
+ dquot_resume(sb, -1);
sb->s_flags = old_sb_flags;
sbi->s_mount_opt = old_opts.s_mount_opt;
sbi->s_mount_opt2 = old_opts.s_mount_opt2;
@@ -6643,8 +6686,9 @@ static int ext4_reconfigure(struct fs_context *fc)
if (ret < 0)
return ret;
- ext4_msg(sb, KERN_INFO, "re-mounted %pU. Quota mode: %s.",
- &sb->s_uuid, ext4_quota_mode(sb));
+ ext4_msg(sb, KERN_INFO, "re-mounted %pU %s. Quota mode: %s.",
+ &sb->s_uuid, sb_rdonly(sb) ? "ro" : "r/w",
+ ext4_quota_mode(sb));
return 0;
}
@@ -6870,23 +6914,6 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY;
}
- /*
- * When we journal data on quota file, we have to flush journal to see
- * all updates to the file when we bypass pagecache...
- */
- if (EXT4_SB(sb)->s_journal &&
- ext4_should_journal_data(d_inode(path->dentry))) {
- /*
- * We don't need to lock updates but journal_flush() could
- * otherwise be livelocked...
- */
- jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
- err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0);
- jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
- if (err)
- return err;
- }
-
lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA);
err = dquot_quota_on(sb, type, format_id, path);
if (!err) {
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