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Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c102
1 files changed, 64 insertions, 38 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 7c46693a14d7..185f7e61f4cf 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* linux/fs/ext4/super.c
*
@@ -40,6 +41,7 @@
#include <linux/dax.h>
#include <linux/cleancache.h>
#include <linux/uaccess.h>
+#include <linux/iversion.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
@@ -99,15 +101,13 @@ static struct inode *ext4_get_journal_inode(struct super_block *sb,
* i_data_sem (rw)
*
* truncate:
- * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) ->
- * i_mmap_rwsem (w) -> page lock
- * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) ->
- * transaction start -> i_data_sem (rw)
+ * sb_start_write -> i_mutex -> i_mmap_sem (w) -> i_mmap_rwsem (w) -> page lock
+ * sb_start_write -> i_mutex -> i_mmap_sem (w) -> transaction start ->
+ * i_data_sem (rw)
*
* direct IO:
- * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem
- * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) ->
- * transaction start -> i_data_sem (rw)
+ * sb_start_write -> i_mutex -> mmap_sem
+ * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw)
*
* writepages:
* transaction start -> page lock(s) -> i_data_sem (rw)
@@ -446,6 +446,7 @@ void __ext4_error(struct super_block *sb, const char *function,
if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
return;
+ trace_ext4_error(sb, function, line);
if (ext4_error_ratelimit(sb)) {
va_start(args, fmt);
vaf.fmt = fmt;
@@ -470,6 +471,7 @@ void __ext4_error_inode(struct inode *inode, const char *function,
if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
return;
+ trace_ext4_error(inode->i_sb, function, line);
es->s_last_error_ino = cpu_to_le32(inode->i_ino);
es->s_last_error_block = cpu_to_le64(block);
if (ext4_error_ratelimit(inode->i_sb)) {
@@ -505,6 +507,7 @@ void __ext4_error_file(struct file *file, const char *function,
if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
return;
+ trace_ext4_error(inode->i_sb, function, line);
es = EXT4_SB(inode->i_sb)->s_es;
es->s_last_error_ino = cpu_to_le32(inode->i_ino);
if (ext4_error_ratelimit(inode->i_sb)) {
@@ -717,6 +720,7 @@ __acquires(bitlock)
if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
return;
+ trace_ext4_error(sb, function, line);
es->s_last_error_ino = cpu_to_le32(ino);
es->s_last_error_block = cpu_to_le64(block);
__save_error_info(sb, function, line);
@@ -742,6 +746,7 @@ __acquires(bitlock)
}
ext4_unlock_group(sb, grp);
+ ext4_commit_super(sb, 1);
ext4_handle_error(sb);
/*
* We only get here in the ERRORS_RO case; relocking the group
@@ -870,7 +875,6 @@ static void ext4_put_super(struct super_block *sb)
ext4_unregister_li_request(sb);
ext4_quota_off_umount(sb);
- flush_workqueue(sbi->rsv_conversion_wq);
destroy_workqueue(sbi->rsv_conversion_wq);
if (sbi->s_journal) {
@@ -967,7 +971,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
if (!ei)
return NULL;
- ei->vfs_inode.i_version = 1;
+ inode_set_iversion(&ei->vfs_inode, 1);
spin_lock_init(&ei->i_raw_lock);
INIT_LIST_HEAD(&ei->i_prealloc_list);
spin_lock_init(&ei->i_prealloc_lock);
@@ -1036,11 +1040,13 @@ static void init_once(void *foo)
static int __init init_inodecache(void)
{
- ext4_inode_cachep = kmem_cache_create("ext4_inode_cache",
- sizeof(struct ext4_inode_info),
- 0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD|SLAB_ACCOUNT),
- init_once);
+ ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache",
+ sizeof(struct ext4_inode_info), 0,
+ (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
+ SLAB_ACCOUNT),
+ offsetof(struct ext4_inode_info, i_data),
+ sizeof_field(struct ext4_inode_info, i_data),
+ init_once);
if (ext4_inode_cachep == NULL)
return -ENOMEM;
return 0;
@@ -1069,9 +1075,7 @@ void ext4_clear_inode(struct inode *inode)
jbd2_free_inode(EXT4_I(inode)->jinode);
EXT4_I(inode)->jinode = NULL;
}
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
- fscrypt_put_encryption_info(inode, NULL);
-#endif
+ fscrypt_put_encryption_info(inode);
}
static struct inode *ext4_nfs_get_inode(struct super_block *sb,
@@ -2017,7 +2021,7 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
- int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt;
+ int def_errors, def_mount_opt = sbi->s_def_mount_opt;
const struct mount_opts *m;
char sep = nodefs ? '\n' : ',';
@@ -2032,7 +2036,7 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) ||
(m->flags & MOPT_CLEAR_ERR))
continue;
- if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt)))
+ if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt)))
continue; /* skip if same as the default */
if ((want_set &&
(sbi->s_mount_opt & m->mount_opt) != m->mount_opt) ||
@@ -2066,7 +2070,8 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
SEQ_OPTS_PUTS("i_version");
if (nodefs || sbi->s_stripe)
SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe);
- if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) {
+ if (nodefs || EXT4_MOUNT_DATA_FLAGS &
+ (sbi->s_mount_opt ^ def_mount_opt)) {
if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
SEQ_OPTS_PUTS("data=journal");
else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
@@ -2079,7 +2084,7 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
SEQ_OPTS_PRINT("inode_readahead_blks=%u",
sbi->s_inode_readahead_blks);
- if (nodefs || (test_opt(sb, INIT_INODE_TABLE) &&
+ if (test_opt(sb, INIT_INODE_TABLE) && (nodefs ||
(sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT)))
SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult);
if (nodefs || sbi->s_max_dir_size_kb)
@@ -2331,6 +2336,8 @@ static int ext4_check_descriptors(struct super_block *sb,
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
"Block bitmap for group %u overlaps "
"superblock", i);
+ if (!sb_rdonly(sb))
+ return 0;
}
if (block_bitmap < first_block || block_bitmap > last_block) {
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
@@ -2343,6 +2350,8 @@ static int ext4_check_descriptors(struct super_block *sb,
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
"Inode bitmap for group %u overlaps "
"superblock", i);
+ if (!sb_rdonly(sb))
+ return 0;
}
if (inode_bitmap < first_block || inode_bitmap > last_block) {
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
@@ -2355,6 +2364,8 @@ static int ext4_check_descriptors(struct super_block *sb,
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
"Inode table for group %u overlaps "
"superblock", i);
+ if (!sb_rdonly(sb))
+ return 0;
}
if (inode_table < first_block ||
inode_table + sbi->s_itb_per_group - 1 > last_block) {
@@ -2676,7 +2687,7 @@ static ext4_fsblk_t descriptor_loc(struct super_block *sb,
* compensate.
*/
if (sb->s_blocksize == 1024 && nr == 0 &&
- le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0)
+ le32_to_cpu(sbi->s_es->s_first_data_block) == 0)
has_super++;
return (has_super + ext4_group_first_block_no(sb, bg));
@@ -3121,7 +3132,7 @@ int ext4_register_li_request(struct super_block *sb,
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_li_request *elr = NULL;
- ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
+ ext4_group_t ngroups = sbi->s_groups_count;
int ret = 0;
mutex_lock(&ext4_li_mtx);
@@ -3488,15 +3499,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
/* Load the checksum driver */
- if (ext4_has_feature_metadata_csum(sb) ||
- ext4_has_feature_ea_inode(sb)) {
- sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
- if (IS_ERR(sbi->s_chksum_driver)) {
- ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver.");
- ret = PTR_ERR(sbi->s_chksum_driver);
- sbi->s_chksum_driver = NULL;
- goto failed_mount;
- }
+ sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
+ if (IS_ERR(sbi->s_chksum_driver)) {
+ ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver.");
+ ret = PTR_ERR(sbi->s_chksum_driver);
+ sbi->s_chksum_driver = NULL;
+ goto failed_mount;
}
/* Check superblock checksum */
@@ -3658,6 +3666,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
ext4_msg(sb, KERN_INFO, "mounting ext2 file system "
"using the ext4 subsystem");
else {
+ /*
+ * If we're probing be silent, if this looks like
+ * it's actually an ext[34] filesystem.
+ */
+ if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb)))
+ goto failed_mount;
ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due "
"to feature incompatibilities");
goto failed_mount;
@@ -3669,6 +3683,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
ext4_msg(sb, KERN_INFO, "mounting ext3 file system "
"using the ext4 subsystem");
else {
+ /*
+ * If we're probing be silent, if this looks like
+ * it's actually an ext4 filesystem.
+ */
+ if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb)))
+ goto failed_mount;
ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due "
"to feature incompatibilities");
goto failed_mount;
@@ -3710,11 +3730,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
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;
+ sbi->s_mount_opt &= ~EXT4_MOUNT_DAX;
}
err = bdev_dax_supported(sb, blocksize);
- if (err)
- goto failed_mount;
+ if (err) {
+ ext4_msg(sb, KERN_ERR,
+ "DAX unsupported by block device. Turning off DAX.");
+ sbi->s_mount_opt &= ~EXT4_MOUNT_DAX;
+ }
}
if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {
@@ -4089,10 +4112,13 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
* cope, else JOURNAL_DATA
*/
if (jbd2_journal_check_available_features
- (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE))
+ (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
set_opt(sb, ORDERED_DATA);
- else
+ sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA;
+ } else {
set_opt(sb, JOURNAL_DATA);
+ sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;
+ }
break;
case EXT4_MOUNT_ORDERED_DATA:
@@ -4836,7 +4862,7 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
bool needs_barrier = false;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
+ if (unlikely(ext4_forced_shutdown(sbi)))
return 0;
trace_ext4_sync_fs(sb, wait);
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