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-rw-r--r--fs/ext4/super.c155
1 files changed, 118 insertions, 37 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 94cc84d..85b3dd6 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -69,6 +69,7 @@ static void ext4_mark_recovery_complete(struct super_block *sb,
static void ext4_clear_journal_err(struct super_block *sb,
struct ext4_super_block *es);
static int ext4_sync_fs(struct super_block *sb, int wait);
+static int ext4_sync_fs_nojournal(struct super_block *sb, int wait);
static int ext4_remount(struct super_block *sb, int *flags, char *data);
static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
static int ext4_unfreeze(struct super_block *sb);
@@ -398,6 +399,11 @@ static void ext4_handle_error(struct super_block *sb)
}
if (test_opt(sb, ERRORS_RO)) {
ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");
+ /*
+ * Make sure updated value of ->s_mount_flags will be visible
+ * before ->s_flags update
+ */
+ smp_wmb();
sb->s_flags |= MS_RDONLY;
}
if (test_opt(sb, ERRORS_PANIC))
@@ -422,9 +428,9 @@ void __ext4_error(struct super_block *sb, const char *function,
ext4_handle_error(sb);
}
-void ext4_error_inode(struct inode *inode, const char *function,
- unsigned int line, ext4_fsblk_t block,
- const char *fmt, ...)
+void __ext4_error_inode(struct inode *inode, const char *function,
+ unsigned int line, ext4_fsblk_t block,
+ const char *fmt, ...)
{
va_list args;
struct va_format vaf;
@@ -451,9 +457,9 @@ void ext4_error_inode(struct inode *inode, const char *function,
ext4_handle_error(inode->i_sb);
}
-void ext4_error_file(struct file *file, const char *function,
- unsigned int line, ext4_fsblk_t block,
- const char *fmt, ...)
+void __ext4_error_file(struct file *file, const char *function,
+ unsigned int line, ext4_fsblk_t block,
+ const char *fmt, ...)
{
va_list args;
struct va_format vaf;
@@ -570,8 +576,13 @@ void __ext4_abort(struct super_block *sb, const char *function,
if ((sb->s_flags & MS_RDONLY) == 0) {
ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");
- sb->s_flags |= MS_RDONLY;
EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED;
+ /*
+ * Make sure updated value of ->s_mount_flags will be visible
+ * before ->s_flags update
+ */
+ smp_wmb();
+ sb->s_flags |= MS_RDONLY;
if (EXT4_SB(sb)->s_journal)
jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO);
save_error_info(sb, function, line);
@@ -580,7 +591,8 @@ void __ext4_abort(struct super_block *sb, const char *function,
panic("EXT4-fs panic from previous error\n");
}
-void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...)
+void __ext4_msg(struct super_block *sb,
+ const char *prefix, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
@@ -750,8 +762,10 @@ static void ext4_put_super(struct super_block *sb)
ext4_unregister_li_request(sb);
dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
- flush_workqueue(sbi->dio_unwritten_wq);
- destroy_workqueue(sbi->dio_unwritten_wq);
+ flush_workqueue(sbi->unrsv_conversion_wq);
+ flush_workqueue(sbi->rsv_conversion_wq);
+ destroy_workqueue(sbi->unrsv_conversion_wq);
+ destroy_workqueue(sbi->rsv_conversion_wq);
if (sbi->s_journal) {
err = jbd2_journal_destroy(sbi->s_journal);
@@ -760,7 +774,7 @@ static void ext4_put_super(struct super_block *sb)
ext4_abort(sb, "Couldn't clean up the journal");
}
- ext4_es_unregister_shrinker(sb);
+ ext4_es_unregister_shrinker(sbi);
del_timer(&sbi->s_err_report);
ext4_release_system_zone(sb);
ext4_mb_release(sb);
@@ -849,6 +863,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
rwlock_init(&ei->i_es_lock);
INIT_LIST_HEAD(&ei->i_es_lru);
ei->i_es_lru_nr = 0;
+ ei->i_touch_when = 0;
ei->i_reserved_data_blocks = 0;
ei->i_reserved_meta_blocks = 0;
ei->i_allocated_meta_blocks = 0;
@@ -859,13 +874,15 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
ei->i_reserved_quota = 0;
#endif
ei->jinode = NULL;
- INIT_LIST_HEAD(&ei->i_completed_io_list);
+ INIT_LIST_HEAD(&ei->i_rsv_conversion_list);
+ INIT_LIST_HEAD(&ei->i_unrsv_conversion_list);
spin_lock_init(&ei->i_completed_io_lock);
ei->i_sync_tid = 0;
ei->i_datasync_tid = 0;
atomic_set(&ei->i_ioend_count, 0);
atomic_set(&ei->i_unwritten, 0);
- INIT_WORK(&ei->i_unwritten_work, ext4_end_io_work);
+ INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work);
+ INIT_WORK(&ei->i_unrsv_conversion_work, ext4_end_io_unrsv_work);
return &ei->vfs_inode;
}
@@ -1093,6 +1110,7 @@ static const struct super_operations ext4_nojournal_sops = {
.dirty_inode = ext4_dirty_inode,
.drop_inode = ext4_drop_inode,
.evict_inode = ext4_evict_inode,
+ .sync_fs = ext4_sync_fs_nojournal,
.put_super = ext4_put_super,
.statfs = ext4_statfs,
.remount_fs = ext4_remount,
@@ -1908,7 +1926,6 @@ static int ext4_fill_flex_info(struct super_block *sb)
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_group_desc *gdp = NULL;
ext4_group_t flex_group;
- unsigned int groups_per_flex = 0;
int i, err;
sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex;
@@ -1916,7 +1933,6 @@ static int ext4_fill_flex_info(struct super_block *sb)
sbi->s_log_groups_per_flex = 0;
return 1;
}
- groups_per_flex = 1U << sbi->s_log_groups_per_flex;
err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count);
if (err)
@@ -2164,19 +2180,22 @@ static void ext4_orphan_cleanup(struct super_block *sb,
list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
dquot_initialize(inode);
if (inode->i_nlink) {
- ext4_msg(sb, KERN_DEBUG,
- "%s: truncating inode %lu to %lld bytes",
- __func__, inode->i_ino, inode->i_size);
+ if (test_opt(sb, DEBUG))
+ ext4_msg(sb, KERN_DEBUG,
+ "%s: truncating inode %lu to %lld bytes",
+ __func__, inode->i_ino, inode->i_size);
jbd_debug(2, "truncating inode %lu to %lld bytes\n",
inode->i_ino, inode->i_size);
mutex_lock(&inode->i_mutex);
+ truncate_inode_pages(inode->i_mapping, inode->i_size);
ext4_truncate(inode);
mutex_unlock(&inode->i_mutex);
nr_truncates++;
} else {
- ext4_msg(sb, KERN_DEBUG,
- "%s: deleting unreferenced inode %lu",
- __func__, inode->i_ino);
+ if (test_opt(sb, DEBUG))
+ ext4_msg(sb, KERN_DEBUG,
+ "%s: deleting unreferenced inode %lu",
+ __func__, inode->i_ino);
jbd_debug(2, "deleting unreferenced inode %lu\n",
inode->i_ino);
nr_orphans++;
@@ -2377,7 +2396,10 @@ struct ext4_attr {
ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *);
ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *,
const char *, size_t);
- int offset;
+ union {
+ int offset;
+ int deprecated_val;
+ } u;
};
static int parse_strtoull(const char *buf,
@@ -2446,7 +2468,7 @@ static ssize_t inode_readahead_blks_store(struct ext4_attr *a,
static ssize_t sbi_ui_show(struct ext4_attr *a,
struct ext4_sb_info *sbi, char *buf)
{
- unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
+ unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset);
return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
}
@@ -2455,7 +2477,7 @@ static ssize_t sbi_ui_store(struct ext4_attr *a,
struct ext4_sb_info *sbi,
const char *buf, size_t count)
{
- unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
+ unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset);
unsigned long t;
int ret;
@@ -2504,12 +2526,20 @@ static ssize_t trigger_test_error(struct ext4_attr *a,
return count;
}
+static ssize_t sbi_deprecated_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val);
+}
+
#define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \
static struct ext4_attr ext4_attr_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
- .offset = offsetof(struct ext4_sb_info, _elname), \
+ .u = { \
+ .offset = offsetof(struct ext4_sb_info, _elname),\
+ }, \
}
#define EXT4_ATTR(name, mode, show, store) \
static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store)
@@ -2520,6 +2550,14 @@ static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store)
#define EXT4_RW_ATTR_SBI_UI(name, elname) \
EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname)
#define ATTR_LIST(name) &ext4_attr_##name.attr
+#define EXT4_DEPRECATED_ATTR(_name, _val) \
+static struct ext4_attr ext4_attr_##_name = { \
+ .attr = {.name = __stringify(_name), .mode = 0444 }, \
+ .show = sbi_deprecated_show, \
+ .u = { \
+ .deprecated_val = _val, \
+ }, \
+}
EXT4_RO_ATTR(delayed_allocation_blocks);
EXT4_RO_ATTR(session_write_kbytes);
@@ -2534,7 +2572,7 @@ EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
-EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump);
+EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128);
EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb);
EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error);
@@ -3763,7 +3801,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_err_report.data = (unsigned long) sb;
/* Register extent status tree shrinker */
- ext4_es_register_shrinker(sb);
+ ext4_es_register_shrinker(sbi);
err = percpu_counter_init(&sbi->s_freeclusters_counter,
ext4_count_free_clusters(sb));
@@ -3787,7 +3825,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
sbi->s_stripe = ext4_get_stripe_size(sbi);
- sbi->s_max_writeback_mb_bump = 128;
sbi->s_extent_max_zeroout_kb = 32;
/*
@@ -3915,12 +3952,20 @@ no_journal:
* The maximum number of concurrent works can be high and
* concurrency isn't really necessary. Limit it to 1.
*/
- EXT4_SB(sb)->dio_unwritten_wq =
- alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
- if (!EXT4_SB(sb)->dio_unwritten_wq) {
- printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");
+ EXT4_SB(sb)->rsv_conversion_wq =
+ 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;
- goto failed_mount_wq;
+ goto failed_mount4;
+ }
+
+ EXT4_SB(sb)->unrsv_conversion_wq =
+ alloc_workqueue("ext4-unrsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
+ if (!EXT4_SB(sb)->unrsv_conversion_wq) {
+ printk(KERN_ERR "EXT4-fs: failed to create workqueue\n");
+ ret = -ENOMEM;
+ goto failed_mount4;
}
/*
@@ -4074,14 +4119,17 @@ failed_mount4a:
sb->s_root = NULL;
failed_mount4:
ext4_msg(sb, KERN_ERR, "mount failed");
- destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq);
+ if (EXT4_SB(sb)->rsv_conversion_wq)
+ destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
+ if (EXT4_SB(sb)->unrsv_conversion_wq)
+ destroy_workqueue(EXT4_SB(sb)->unrsv_conversion_wq);
failed_mount_wq:
if (sbi->s_journal) {
jbd2_journal_destroy(sbi->s_journal);
sbi->s_journal = NULL;
}
failed_mount3:
- ext4_es_unregister_shrinker(sb);
+ ext4_es_unregister_shrinker(sbi);
del_timer(&sbi->s_err_report);
if (sbi->s_flex_groups)
ext4_kvfree(sbi->s_flex_groups);
@@ -4517,19 +4565,52 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
{
int ret = 0;
tid_t target;
+ bool needs_barrier = false;
struct ext4_sb_info *sbi = EXT4_SB(sb);
trace_ext4_sync_fs(sb, wait);
- flush_workqueue(sbi->dio_unwritten_wq);
+ flush_workqueue(sbi->rsv_conversion_wq);
+ flush_workqueue(sbi->unrsv_conversion_wq);
/*
* Writeback quota in non-journalled quota case - journalled quota has
* no dirty dquots
*/
dquot_writeback_dquots(sb, -1);
+ /*
+ * Data writeback is possible w/o journal transaction, so barrier must
+ * being sent at the end of the function. But we can skip it if
+ * transaction_commit will do it for us.
+ */
+ target = jbd2_get_latest_transaction(sbi->s_journal);
+ if (wait && sbi->s_journal->j_flags & JBD2_BARRIER &&
+ !jbd2_trans_will_send_data_barrier(sbi->s_journal, target))
+ needs_barrier = true;
+
if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
if (wait)
- jbd2_log_wait_commit(sbi->s_journal, target);
+ ret = jbd2_log_wait_commit(sbi->s_journal, target);
+ }
+ if (needs_barrier) {
+ int err;
+ err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
+ if (!ret)
+ ret = err;
}
+
+ return ret;
+}
+
+static int ext4_sync_fs_nojournal(struct super_block *sb, int wait)
+{
+ int ret = 0;
+
+ trace_ext4_sync_fs(sb, wait);
+ flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq);
+ flush_workqueue(EXT4_SB(sb)->unrsv_conversion_wq);
+ dquot_writeback_dquots(sb, -1);
+ if (wait && test_opt(sb, BARRIER))
+ ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
+
return ret;
}
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