1 files changed, 77 insertions, 48 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 40131b777af6..fb15c9c0be74 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -828,12 +828,22 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
         ei->cur_aio_dio = NULL;
         ei->i_sync_tid = 0;
         ei->i_datasync_tid = 0;
+        atomic_set(&ei->i_ioend_count, 0);
 
         return &ei->vfs_inode;
 }
 
+static int ext4_drop_inode(struct inode *inode)
+{
+        int drop = generic_drop_inode(inode);
+
+        trace_ext4_drop_inode(inode, drop);
+        return drop;
+}
+
 static void ext4_destroy_inode(struct inode *inode)
 {
+        ext4_ioend_wait(inode);
         if (!list_empty(&(EXT4_I(inode)->i_orphan))) {
                 ext4_msg(inode->i_sb, KERN_ERR,
                          "Inode %lu (%p): orphan list check failed!",
@@ -1016,6 +1026,8 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
             !(def_mount_opts & EXT4_DEFM_NODELALLOC))
                 seq_puts(seq, ",nodelalloc");
 
+        if (test_opt(sb, MBLK_IO_SUBMIT))
+                seq_puts(seq, ",mblk_io_submit");
         if (sbi->s_stripe)
                 seq_printf(seq, ",stripe=%lu", sbi->s_stripe);
         /*
@@ -1173,6 +1185,7 @@ static const struct super_operations ext4_sops = {
         .destroy_inode  = ext4_destroy_inode,
         .write_inode    = ext4_write_inode,
         .dirty_inode    = ext4_dirty_inode,
+        .drop_inode     = ext4_drop_inode,
         .evict_inode    = ext4_evict_inode,
         .put_super      = ext4_put_super,
         .sync_fs        = ext4_sync_fs,
@@ -1186,7 +1199,6 @@ static const struct super_operations ext4_sops = {
         .quota_write    = ext4_quota_write,
 #endif
         .bdev_try_to_free_page = bdev_try_to_free_page,
-        .trim_fs        = ext4_trim_fs
 };
 
 static const struct super_operations ext4_nojournal_sops = {
@@ -1194,6 +1206,7 @@ static const struct super_operations ext4_nojournal_sops = {
         .destroy_inode  = ext4_destroy_inode,
         .write_inode    = ext4_write_inode,
         .dirty_inode    = ext4_dirty_inode,
+        .drop_inode     = ext4_drop_inode,
         .evict_inode    = ext4_evict_inode,
         .write_super    = ext4_write_super,
         .put_super      = ext4_put_super,
@@ -1228,8 +1241,8 @@ enum {
         Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
         Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err,
         Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version,
-        Opt_stripe, Opt_delalloc, Opt_nodelalloc,
-        Opt_block_validity, Opt_noblock_validity,
+        Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,
+        Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
         Opt_inode_readahead_blks, Opt_journal_ioprio,
         Opt_dioread_nolock, Opt_dioread_lock,
         Opt_discard, Opt_nodiscard,
@@ -1293,6 +1306,8 @@ static const match_table_t tokens = {
         {Opt_resize, "resize"},
         {Opt_delalloc, "delalloc"},
         {Opt_nodelalloc, "nodelalloc"},
+        {Opt_mblk_io_submit, "mblk_io_submit"},
+        {Opt_nomblk_io_submit, "nomblk_io_submit"},
         {Opt_block_validity, "block_validity"},
         {Opt_noblock_validity, "noblock_validity"},
         {Opt_inode_readahead_blks, "inode_readahead_blks=%u"},
@@ -1714,6 +1729,12 @@ set_qf_format:
                 case Opt_nodelalloc:
                         clear_opt(sbi->s_mount_opt, DELALLOC);
                         break;
+                case Opt_mblk_io_submit:
+                        set_opt(sbi->s_mount_opt, MBLK_IO_SUBMIT);
+                        break;
+                case Opt_nomblk_io_submit:
+                        clear_opt(sbi->s_mount_opt, MBLK_IO_SUBMIT);
+                        break;
                 case Opt_stripe:
                         if (match_int(&args[0], &option))
                                 return 0;
@@ -2699,7 +2720,6 @@ static int ext4_lazyinit_thread(void *arg)
         struct ext4_li_request *elr;
         unsigned long next_wakeup;
         DEFINE_WAIT(wait);
-        int ret;
 
         BUG_ON(NULL == eli);
 
@@ -2723,13 +2743,12 @@ cont_thread:
                         elr = list_entry(pos, struct ext4_li_request,
                                          lr_request);
 
-                        if (time_after_eq(jiffies, elr->lr_next_sched))
-                                ret = ext4_run_li_request(elr);
-
-                        if (ret) {
-                                ret = 0;
-                                ext4_remove_li_request(elr);
-                                continue;
+                        if (time_after_eq(jiffies, elr->lr_next_sched)) {
+                                if (ext4_run_li_request(elr) != 0) {
+                                        /* error, remove the lazy_init job */
+                                        ext4_remove_li_request(elr);
+                                        continue;
+                                }
                         }
 
                         if (time_before(elr->lr_next_sched, next_wakeup))
@@ -2740,7 +2759,8 @@ cont_thread:
                 if (freezing(current))
                         refrigerator();
 
-                if (time_after_eq(jiffies, next_wakeup)) {
+                if ((time_after_eq(jiffies, next_wakeup)) ||
+                    (MAX_JIFFY_OFFSET == next_wakeup)) {
                         cond_resched();
                         continue;
                 }
@@ -2788,9 +2808,6 @@ static void ext4_clear_request_list(void)
         struct ext4_li_request *elr;
 
         mutex_lock(&ext4_li_info->li_list_mtx);
-        if (list_empty(&ext4_li_info->li_request_list))
-                return;
-
         list_for_each_safe(pos, n, &ext4_li_info->li_request_list) {
                 elr = list_entry(pos, struct ext4_li_request,
                                  lr_request);
@@ -3257,13 +3274,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
          * Test whether we have more sectors than will fit in sector_t,
          * and whether the max offset is addressable by the page cache.
          */
-        ret = generic_check_addressable(sb->s_blocksize_bits,
+        err = generic_check_addressable(sb->s_blocksize_bits,
                                         ext4_blocks_count(es));
-        if (ret) {
+        if (err) {
                 ext4_msg(sb, KERN_ERR, "filesystem"
                          " too large to mount safely on this system");
                 if (sizeof(sector_t) < 8)
                         ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled");
+                ret = err;
                 goto failed_mount;
         }
 
@@ -3348,6 +3366,24 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
         get_random_bytes(&sbi->s_next_generation, sizeof(u32));
         spin_lock_init(&sbi->s_next_gen_lock);
 
+        err = percpu_counter_init(&sbi->s_freeblocks_counter,
+                        ext4_count_free_blocks(sb));
+        if (!err) {
+                err = percpu_counter_init(&sbi->s_freeinodes_counter,
+                                ext4_count_free_inodes(sb));
+        }
+        if (!err) {
+                err = percpu_counter_init(&sbi->s_dirs_counter,
+                                ext4_count_dirs(sb));
+        }
+        if (!err) {
+                err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
+        }
+        if (err) {
+                ext4_msg(sb, KERN_ERR, "insufficient memory");
+                goto failed_mount3;
+        }
+
         sbi->s_stripe = ext4_get_stripe_size(sbi);
         sbi->s_max_writeback_mb_bump = 128;
 
@@ -3446,22 +3482,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
         }
         set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
 
-no_journal:
-        err = percpu_counter_init(&sbi->s_freeblocks_counter,
-                                  ext4_count_free_blocks(sb));
-        if (!err)
-                err = percpu_counter_init(&sbi->s_freeinodes_counter,
-                                          ext4_count_free_inodes(sb));
-        if (!err)
-                err = percpu_counter_init(&sbi->s_dirs_counter,
-                                          ext4_count_dirs(sb));
-        if (!err)
-                err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
-        if (err) {
-                ext4_msg(sb, KERN_ERR, "insufficient memory");
-                goto failed_mount_wq;
-        }
+        /*
+         * The journal may have updated the bg summary counts, so we
+         * need to update the global counters.
+         */
+        percpu_counter_set(&sbi->s_freeblocks_counter,
+                           ext4_count_free_blocks(sb));
+        percpu_counter_set(&sbi->s_freeinodes_counter,
+                           ext4_count_free_inodes(sb));
+        percpu_counter_set(&sbi->s_dirs_counter,
+                           ext4_count_dirs(sb));
+        percpu_counter_set(&sbi->s_dirtyblocks_counter, 0);
 
+no_journal:
         EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten");
         if (!EXT4_SB(sb)->dio_unwritten_wq) {
                 printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");
@@ -3611,10 +3644,6 @@ failed_mount_wq:
                 jbd2_journal_destroy(sbi->s_journal);
                 sbi->s_journal = NULL;
         }
-        percpu_counter_destroy(&sbi->s_freeblocks_counter);
-        percpu_counter_destroy(&sbi->s_freeinodes_counter);
-        percpu_counter_destroy(&sbi->s_dirs_counter);
-        percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount3:
         if (sbi->s_flex_groups) {
                 if (is_vmalloc_addr(sbi->s_flex_groups))
@@ -3622,6 +3651,10 @@ failed_mount3:
                 else
                         kfree(sbi->s_flex_groups);
         }
+        percpu_counter_destroy(&sbi->s_freeblocks_counter);
+        percpu_counter_destroy(&sbi->s_freeinodes_counter);
+        percpu_counter_destroy(&sbi->s_dirs_counter);
+        percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
 failed_mount2:
         for (i = 0; i < db_count; i++)
                 brelse(sbi->s_group_desc[i]);
@@ -3949,13 +3982,11 @@ static int ext4_commit_super(struct super_block *sb, int sync)
         else
                 es->s_kbytes_written =
                         cpu_to_le64(EXT4_SB(sb)->s_kbytes_written);
-        if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeblocks_counter))
-                ext4_free_blocks_count_set(es, percpu_counter_sum_positive(
-                                        &EXT4_SB(sb)->s_freeblocks_counter));
-        if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter))
-                es->s_free_inodes_count =
-                        cpu_to_le32(percpu_counter_sum_positive(
-                                        &EXT4_SB(sb)->s_freeinodes_counter));
+        ext4_free_blocks_count_set(es, percpu_counter_sum_positive(
+                                           &EXT4_SB(sb)->s_freeblocks_counter));
+        es->s_free_inodes_count =
+                cpu_to_le32(percpu_counter_sum_positive(
+                                &EXT4_SB(sb)->s_freeinodes_counter));
         sb->s_dirt = 0;
         BUFFER_TRACE(sbh, "marking dirty");
         mark_buffer_dirty(sbh);
@@ -4556,12 +4587,10 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
 
 static int ext4_quota_off(struct super_block *sb, int type)
 {
-        /* Force all delayed allocation blocks to be allocated */
-        if (test_opt(sb, DELALLOC)) {
-                down_read(&sb->s_umount);
+        /* Force all delayed allocation blocks to be allocated.
+         * Caller already holds s_umount sem */
+        if (test_opt(sb, DELALLOC))
                 sync_filesystem(sb);
-                up_read(&sb->s_umount);
-        }
 
         return dquot_quota_off(sb, type);
 }