1 files changed, 164 insertions, 133 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c93bd1e651f5..cb10a06775e4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -388,13 +388,14 @@ static void ext4_handle_error(struct super_block *sb)
 void __ext4_error(struct super_block *sb, const char *function,
                   unsigned int line, const char *fmt, ...)
 {
+        struct va_format vaf;
         va_list args;
 
         va_start(args, fmt);
-        printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ",
-               sb->s_id, function, line, current->comm);
-        vprintk(fmt, args);
-        printk("\n");
+        vaf.fmt = fmt;
+        vaf.va = &args;
+        printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n",
+               sb->s_id, function, line, current->comm, &vaf);
         va_end(args);
 
         ext4_handle_error(sb);
@@ -405,28 +406,31 @@ void ext4_error_inode(struct inode *inode, const char *function,
                       const char *fmt, ...)
 {
         va_list args;
+        struct va_format vaf;
         struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
 
         es->s_last_error_ino = cpu_to_le32(inode->i_ino);
         es->s_last_error_block = cpu_to_le64(block);
         save_error_info(inode->i_sb, function, line);
         va_start(args, fmt);
+        vaf.fmt = fmt;
+        vaf.va = &args;
         printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ",
                inode->i_sb->s_id, function, line, inode->i_ino);
         if (block)
-                printk("block %llu: ", block);
-        printk("comm %s: ", current->comm);
-        vprintk(fmt, args);
-        printk("\n");
+                printk(KERN_CONT "block %llu: ", block);
+        printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf);
         va_end(args);
 
         ext4_handle_error(inode->i_sb);
 }
 
 void ext4_error_file(struct file *file, const char *function,
-                     unsigned int line, const char *fmt, ...)
+                     unsigned int line, ext4_fsblk_t block,
+                     const char *fmt, ...)
 {
         va_list args;
+        struct va_format vaf;
         struct ext4_super_block *es;
         struct inode *inode = file->f_dentry->d_inode;
         char pathname[80], *path;
@@ -434,17 +438,18 @@ void ext4_error_file(struct file *file, const char *function,
         es = EXT4_SB(inode->i_sb)->s_es;
         es->s_last_error_ino = cpu_to_le32(inode->i_ino);
         save_error_info(inode->i_sb, function, line);
-        va_start(args, fmt);
         path = d_path(&(file->f_path), pathname, sizeof(pathname));
-        if (!path)
+        if (IS_ERR(path))
                 path = "(unknown)";
         printk(KERN_CRIT
-               "EXT4-fs error (device %s): %s:%d: inode #%lu "
-               "(comm %s path %s): ",
-               inode->i_sb->s_id, function, line, inode->i_ino,
-               current->comm, path);
-        vprintk(fmt, args);
-        printk("\n");
+               "EXT4-fs error (device %s): %s:%d: inode #%lu: ",
+               inode->i_sb->s_id, function, line, inode->i_ino);
+        if (block)
+                printk(KERN_CONT "block %llu: ", block);
+        va_start(args, fmt);
+        vaf.fmt = fmt;
+        vaf.va = &args;
+        printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf);
         va_end(args);
 
         ext4_handle_error(inode->i_sb);
@@ -543,28 +548,29 @@ 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;
 
         va_start(args, fmt);
-        printk("%sEXT4-fs (%s): ", prefix, sb->s_id);
-        vprintk(fmt, args);
-        printk("\n");
+        vaf.fmt = fmt;
+        vaf.va = &args;
+        printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
         va_end(args);
 }
 
 void __ext4_warning(struct super_block *sb, const char *function,
                     unsigned int line, const char *fmt, ...)
 {
+        struct va_format vaf;
         va_list args;
 
         va_start(args, fmt);
-        printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ",
-               sb->s_id, function, line);
-        vprintk(fmt, args);
-        printk("\n");
+        vaf.fmt = fmt;
+        vaf.va = &args;
+        printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n",
+               sb->s_id, function, line, &vaf);
         va_end(args);
 }
 
@@ -575,21 +581,25 @@ void __ext4_grp_locked_error(const char *function, unsigned int line,
 __releases(bitlock)
 __acquires(bitlock)
 {
+        struct va_format vaf;
         va_list args;
         struct ext4_super_block *es = EXT4_SB(sb)->s_es;
 
         es->s_last_error_ino = cpu_to_le32(ino);
         es->s_last_error_block = cpu_to_le64(block);
         __save_error_info(sb, function, line);
+
         va_start(args, fmt);
+
+        vaf.fmt = fmt;
+        vaf.va = &args;
         printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u",
                sb->s_id, function, line, grp);
         if (ino)
-                printk("inode %lu: ", ino);
+                printk(KERN_CONT "inode %lu: ", ino);
         if (block)
-                printk("block %llu:", (unsigned long long) block);
-        vprintk(fmt, args);
-        printk("\n");
+                printk(KERN_CONT "block %llu:", (unsigned long long) block);
+        printk(KERN_CONT "%pV\n", &vaf);
         va_end(args);
 
         if (test_opt(sb, ERRORS_CONT)) {
@@ -807,21 +817,15 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
         memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache));
         INIT_LIST_HEAD(&ei->i_prealloc_list);
         spin_lock_init(&ei->i_prealloc_lock);
-        /*
-         * Note:  We can be called before EXT4_SB(sb)->s_journal is set,
-         * therefore it can be null here.  Don't check it, just initialize
-         * jinode.
-         */
-        jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode);
         ei->i_reserved_data_blocks = 0;
         ei->i_reserved_meta_blocks = 0;
         ei->i_allocated_meta_blocks = 0;
         ei->i_da_metadata_calc_len = 0;
-        ei->i_delalloc_reserved_flag = 0;
         spin_lock_init(&(ei->i_block_reservation_lock));
 #ifdef CONFIG_QUOTA
         ei->i_reserved_quota = 0;
 #endif
+        ei->jinode = NULL;
         INIT_LIST_HEAD(&ei->i_completed_io_list);
         spin_lock_init(&ei->i_completed_io_lock);
         ei->cur_aio_dio = NULL;
@@ -840,6 +844,13 @@ static int ext4_drop_inode(struct inode *inode)
         return drop;
 }
 
+static void ext4_i_callback(struct rcu_head *head)
+{
+        struct inode *inode = container_of(head, struct inode, i_rcu);
+        INIT_LIST_HEAD(&inode->i_dentry);
+        kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
+}
+
 static void ext4_destroy_inode(struct inode *inode)
 {
         ext4_ioend_wait(inode);
@@ -852,7 +863,7 @@ static void ext4_destroy_inode(struct inode *inode)
                                 true);
                 dump_stack();
         }
-        kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
+        call_rcu(&inode->i_rcu, ext4_i_callback);
 }
 
 static void init_once(void *foo)
@@ -890,9 +901,12 @@ void ext4_clear_inode(struct inode *inode)
         end_writeback(inode);
         dquot_drop(inode);
         ext4_discard_preallocations(inode);
-        if (EXT4_JOURNAL(inode))
-                jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal,
-                                       &EXT4_I(inode)->jinode);
+        if (EXT4_I(inode)->jinode) {
+                jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode),
+                                               EXT4_I(inode)->jinode);
+                jbd2_free_inode(EXT4_I(inode)->jinode);
+                EXT4_I(inode)->jinode = NULL;
+        }
 }
 
 static inline void ext4_show_quota_options(struct seq_file *seq,
@@ -1385,7 +1399,7 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
                 sbi->s_qf_names[qtype] = NULL;
                 return 0;
         }
-        set_opt(sbi->s_mount_opt, QUOTA);
+        set_opt(sb, QUOTA);
         return 1;
 }
 
@@ -1440,21 +1454,21 @@ static int parse_options(char *options, struct super_block *sb,
                 switch (token) {
                 case Opt_bsd_df:
                         ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38");
-                        clear_opt(sbi->s_mount_opt, MINIX_DF);
+                        clear_opt(sb, MINIX_DF);
                         break;
                 case Opt_minix_df:
                         ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38");
-                        set_opt(sbi->s_mount_opt, MINIX_DF);
+                        set_opt(sb, MINIX_DF);
 
                         break;
                 case Opt_grpid:
                         ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38");
-                        set_opt(sbi->s_mount_opt, GRPID);
+                        set_opt(sb, GRPID);
 
                         break;
                 case Opt_nogrpid:
                         ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38");
-                        clear_opt(sbi->s_mount_opt, GRPID);
+                        clear_opt(sb, GRPID);
 
                         break;
                 case Opt_resuid:
@@ -1472,38 +1486,38 @@ static int parse_options(char *options, struct super_block *sb,
                         /* *sb_block = match_int(&args[0]); */
                         break;
                 case Opt_err_panic:
-                        clear_opt(sbi->s_mount_opt, ERRORS_CONT);
-                        clear_opt(sbi->s_mount_opt, ERRORS_RO);
-                        set_opt(sbi->s_mount_opt, ERRORS_PANIC);
+                        clear_opt(sb, ERRORS_CONT);
+                        clear_opt(sb, ERRORS_RO);
+                        set_opt(sb, ERRORS_PANIC);
                         break;
                 case Opt_err_ro:
-                        clear_opt(sbi->s_mount_opt, ERRORS_CONT);
-                        clear_opt(sbi->s_mount_opt, ERRORS_PANIC);
-                        set_opt(sbi->s_mount_opt, ERRORS_RO);
+                        clear_opt(sb, ERRORS_CONT);
+                        clear_opt(sb, ERRORS_PANIC);
+                        set_opt(sb, ERRORS_RO);
                         break;
                 case Opt_err_cont:
-                        clear_opt(sbi->s_mount_opt, ERRORS_RO);
-                        clear_opt(sbi->s_mount_opt, ERRORS_PANIC);
-                        set_opt(sbi->s_mount_opt, ERRORS_CONT);
+                        clear_opt(sb, ERRORS_RO);
+                        clear_opt(sb, ERRORS_PANIC);
+                        set_opt(sb, ERRORS_CONT);
                         break;
                 case Opt_nouid32:
-                        set_opt(sbi->s_mount_opt, NO_UID32);
+                        set_opt(sb, NO_UID32);
                         break;
                 case Opt_debug:
-                        set_opt(sbi->s_mount_opt, DEBUG);
+                        set_opt(sb, DEBUG);
                         break;
                 case Opt_oldalloc:
-                        set_opt(sbi->s_mount_opt, OLDALLOC);
+                        set_opt(sb, OLDALLOC);
                         break;
                 case Opt_orlov:
-                        clear_opt(sbi->s_mount_opt, OLDALLOC);
+                        clear_opt(sb, OLDALLOC);
                         break;
 #ifdef CONFIG_EXT4_FS_XATTR
                 case Opt_user_xattr:
-                        set_opt(sbi->s_mount_opt, XATTR_USER);
+                        set_opt(sb, XATTR_USER);
                         break;
                 case Opt_nouser_xattr:
-                        clear_opt(sbi->s_mount_opt, XATTR_USER);
+                        clear_opt(sb, XATTR_USER);
                         break;
 #else
                 case Opt_user_xattr:
@@ -1513,10 +1527,10 @@ static int parse_options(char *options, struct super_block *sb,
 #endif
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
                 case Opt_acl:
-                        set_opt(sbi->s_mount_opt, POSIX_ACL);
+                        set_opt(sb, POSIX_ACL);
                         break;
                 case Opt_noacl:
-                        clear_opt(sbi->s_mount_opt, POSIX_ACL);
+                        clear_opt(sb, POSIX_ACL);
                         break;
 #else
                 case Opt_acl:
@@ -1535,7 +1549,7 @@ static int parse_options(char *options, struct super_block *sb,
                                          "Cannot specify journal on remount");
                                 return 0;
                         }
-                        set_opt(sbi->s_mount_opt, UPDATE_JOURNAL);
+                        set_opt(sb, UPDATE_JOURNAL);
                         break;
                 case Opt_journal_dev:
                         if (is_remount) {
@@ -1548,14 +1562,14 @@ static int parse_options(char *options, struct super_block *sb,
                         *journal_devnum = option;
                         break;
                 case Opt_journal_checksum:
-                        set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM);
+                        set_opt(sb, JOURNAL_CHECKSUM);
                         break;
                 case Opt_journal_async_commit:
-                        set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT);
-                        set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM);
+                        set_opt(sb, JOURNAL_ASYNC_COMMIT);
+                        set_opt(sb, JOURNAL_CHECKSUM);
                         break;
                 case Opt_noload:
-                        set_opt(sbi->s_mount_opt, NOLOAD);
+                        set_opt(sb, NOLOAD);
                         break;
                 case Opt_commit:
                         if (match_int(&args[0], &option))
@@ -1598,15 +1612,15 @@ static int parse_options(char *options, struct super_block *sb,
                                         return 0;
                                 }
                         } else {
-                                clear_opt(sbi->s_mount_opt, DATA_FLAGS);
+                                clear_opt(sb, DATA_FLAGS);
                                 sbi->s_mount_opt |= data_opt;
                         }
                         break;
                 case Opt_data_err_abort:
-                        set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
+                        set_opt(sb, DATA_ERR_ABORT);
                         break;
                 case Opt_data_err_ignore:
-                        clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
+                        clear_opt(sb, DATA_ERR_ABORT);
                         break;
 #ifdef CONFIG_QUOTA
                 case Opt_usrjquota:
@@ -1646,12 +1660,12 @@ set_qf_format:
                         break;
                 case Opt_quota:
                 case Opt_usrquota:
-                        set_opt(sbi->s_mount_opt, QUOTA);
-                        set_opt(sbi->s_mount_opt, USRQUOTA);
+                        set_opt(sb, QUOTA);
+                        set_opt(sb, USRQUOTA);
                         break;
                 case Opt_grpquota:
-                        set_opt(sbi->s_mount_opt, QUOTA);
-                        set_opt(sbi->s_mount_opt, GRPQUOTA);
+                        set_opt(sb, QUOTA);
+                        set_opt(sb, GRPQUOTA);
                         break;
                 case Opt_noquota:
                         if (sb_any_quota_loaded(sb)) {
@@ -1659,9 +1673,9 @@ set_qf_format:
                                         "options when quota turned on");
                                 return 0;
                         }
-                        clear_opt(sbi->s_mount_opt, QUOTA);
-                        clear_opt(sbi->s_mount_opt, USRQUOTA);
-                        clear_opt(sbi->s_mount_opt, GRPQUOTA);
+                        clear_opt(sb, QUOTA);
+                        clear_opt(sb, USRQUOTA);
+                        clear_opt(sb, GRPQUOTA);
                         break;
 #else
                 case Opt_quota:
@@ -1687,7 +1701,7 @@ set_qf_format:
                         sbi->s_mount_flags |= EXT4_MF_FS_ABORTED;
                         break;
                 case Opt_nobarrier:
-                        clear_opt(sbi->s_mount_opt, BARRIER);
+                        clear_opt(sb, BARRIER);
                         break;
                 case Opt_barrier:
                         if (args[0].from) {
@@ -1696,9 +1710,9 @@ set_qf_format:
                         } else
                                 option = 1;     /* No argument, default to 1 */
                         if (option)
-                                set_opt(sbi->s_mount_opt, BARRIER);
+                                set_opt(sb, BARRIER);
                         else
-                                clear_opt(sbi->s_mount_opt, BARRIER);
+                                clear_opt(sb, BARRIER);
                         break;
                 case Opt_ignore:
                         break;
@@ -1722,17 +1736,17 @@ set_qf_format:
                                  "Ignoring deprecated bh option");
                         break;
                 case Opt_i_version:
-                        set_opt(sbi->s_mount_opt, I_VERSION);
+                        set_opt(sb, I_VERSION);
                         sb->s_flags |= MS_I_VERSION;
                         break;
                 case Opt_nodelalloc:
-                        clear_opt(sbi->s_mount_opt, DELALLOC);
+                        clear_opt(sb, DELALLOC);
                         break;
                 case Opt_mblk_io_submit:
-                        set_opt(sbi->s_mount_opt, MBLK_IO_SUBMIT);
+                        set_opt(sb, MBLK_IO_SUBMIT);
                         break;
                 case Opt_nomblk_io_submit:
-                        clear_opt(sbi->s_mount_opt, MBLK_IO_SUBMIT);
+                        clear_opt(sb, MBLK_IO_SUBMIT);
                         break;
                 case Opt_stripe:
                         if (match_int(&args[0], &option))
@@ -1742,13 +1756,13 @@ set_qf_format:
                         sbi->s_stripe = option;
                         break;
                 case Opt_delalloc:
-                        set_opt(sbi->s_mount_opt, DELALLOC);
+                        set_opt(sb, DELALLOC);
                         break;
                 case Opt_block_validity:
-                        set_opt(sbi->s_mount_opt, BLOCK_VALIDITY);
+                        set_opt(sb, BLOCK_VALIDITY);
                         break;
                 case Opt_noblock_validity:
-                        clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY);
+                        clear_opt(sb, BLOCK_VALIDITY);
                         break;
                 case Opt_inode_readahead_blks:
                         if (match_int(&args[0], &option))
@@ -1772,7 +1786,7 @@ set_qf_format:
                                                             option);
                         break;
                 case Opt_noauto_da_alloc:
-                        set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
+                        set_opt(sb, NO_AUTO_DA_ALLOC);
                         break;
                 case Opt_auto_da_alloc:
                         if (args[0].from) {
@@ -1781,24 +1795,24 @@ set_qf_format:
                         } else
                                 option = 1;     /* No argument, default to 1 */
                         if (option)
-                                clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC);
+                                clear_opt(sb, NO_AUTO_DA_ALLOC);
                         else
-                                set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC);
+                                set_opt(sb,NO_AUTO_DA_ALLOC);
                         break;
                 case Opt_discard:
-                        set_opt(sbi->s_mount_opt, DISCARD);
+                        set_opt(sb, DISCARD);
                         break;
                 case Opt_nodiscard:
-                        clear_opt(sbi->s_mount_opt, DISCARD);
+                        clear_opt(sb, DISCARD);
                         break;
                 case Opt_dioread_nolock:
-                        set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK);
+                        set_opt(sb, DIOREAD_NOLOCK);
                         break;
                 case Opt_dioread_lock:
-                        clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK);
+                        clear_opt(sb, DIOREAD_NOLOCK);
                         break;
                 case Opt_init_inode_table:
-                        set_opt(sbi->s_mount_opt, INIT_INODE_TABLE);
+                        set_opt(sb, INIT_INODE_TABLE);
                         if (args[0].from) {
                                 if (match_int(&args[0], &option))
                                         return 0;
@@ -1809,7 +1823,7 @@ set_qf_format:
                         sbi->s_li_wait_mult = option;
                         break;
                 case Opt_noinit_inode_table:
-                        clear_opt(sbi->s_mount_opt, INIT_INODE_TABLE);
+                        clear_opt(sb, INIT_INODE_TABLE);
                         break;
                 default:
                         ext4_msg(sb, KERN_ERR,
@@ -1821,10 +1835,10 @@ set_qf_format:
 #ifdef CONFIG_QUOTA
         if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
                 if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
-                        clear_opt(sbi->s_mount_opt, USRQUOTA);
+                        clear_opt(sb, USRQUOTA);
 
                 if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
-                        clear_opt(sbi->s_mount_opt, GRPQUOTA);
+                        clear_opt(sb, GRPQUOTA);
 
                 if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) {
                         ext4_msg(sb, KERN_ERR, "old and new quota "
@@ -1894,12 +1908,12 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,
         ext4_commit_super(sb, 1);
         if (test_opt(sb, DEBUG))
                 printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, "
-                                "bpg=%lu, ipg=%lu, mo=%04x]\n",
+                                "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n",
                         sb->s_blocksize,
                         sbi->s_groups_count,
                         EXT4_BLOCKS_PER_GROUP(sb),
                         EXT4_INODES_PER_GROUP(sb),
-                        sbi->s_mount_opt);
+                        sbi->s_mount_opt, sbi->s_mount_opt2);
 
         return res;
 }
@@ -1929,14 +1943,13 @@ static int ext4_fill_flex_info(struct super_block *sb)
         size = flex_group_count * sizeof(struct flex_groups);
         sbi->s_flex_groups = kzalloc(size, GFP_KERNEL);
         if (sbi->s_flex_groups == NULL) {
-                sbi->s_flex_groups = vmalloc(size);
-                if (sbi->s_flex_groups)
-                        memset(sbi->s_flex_groups, 0, size);
-        }
-        if (sbi->s_flex_groups == NULL) {
-                ext4_msg(sb, KERN_ERR, "not enough memory for "
-                                "%u flex groups", flex_group_count);
-                goto failed;
+                sbi->s_flex_groups = vzalloc(size);
+                if (sbi->s_flex_groups == NULL) {
+                        ext4_msg(sb, KERN_ERR,
+                                 "not enough memory for %u flex groups",
+                                 flex_group_count);
+                        goto failed;
+                }
         }
 
         for (i = 0; i < sbi->s_groups_count; i++) {
@@ -2915,7 +2928,7 @@ static int ext4_register_li_request(struct super_block *sb,
         struct ext4_sb_info *sbi = EXT4_SB(sb);
         struct ext4_li_request *elr;
         ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
-        int ret;
+        int ret = 0;
 
         if (sbi->s_li_request != NULL)
                 return 0;
@@ -3070,41 +3083,41 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 
         /* Set defaults before we parse the mount options */
         def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
-        set_opt(sbi->s_mount_opt, INIT_INODE_TABLE);
+        set_opt(sb, INIT_INODE_TABLE);
         if (def_mount_opts & EXT4_DEFM_DEBUG)
-                set_opt(sbi->s_mount_opt, DEBUG);
+                set_opt(sb, DEBUG);
         if (def_mount_opts & EXT4_DEFM_BSDGROUPS) {
                 ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups",
                         "2.6.38");
-                set_opt(sbi->s_mount_opt, GRPID);
+                set_opt(sb, GRPID);
         }
         if (def_mount_opts & EXT4_DEFM_UID16)
-                set_opt(sbi->s_mount_opt, NO_UID32);
+                set_opt(sb, NO_UID32);
 #ifdef CONFIG_EXT4_FS_XATTR
         if (def_mount_opts & EXT4_DEFM_XATTR_USER)
-                set_opt(sbi->s_mount_opt, XATTR_USER);
+                set_opt(sb, XATTR_USER);
 #endif
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
         if (def_mount_opts & EXT4_DEFM_ACL)
-                set_opt(sbi->s_mount_opt, POSIX_ACL);
+                set_opt(sb, POSIX_ACL);
 #endif
         if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA)
-                set_opt(sbi->s_mount_opt, JOURNAL_DATA);
+                set_opt(sb, JOURNAL_DATA);
         else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED)
-                set_opt(sbi->s_mount_opt, ORDERED_DATA);
+                set_opt(sb, ORDERED_DATA);
         else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK)
-                set_opt(sbi->s_mount_opt, WRITEBACK_DATA);
+                set_opt(sb, WRITEBACK_DATA);
 
         if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC)
-                set_opt(sbi->s_mount_opt, ERRORS_PANIC);
+                set_opt(sb, ERRORS_PANIC);
         else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE)
-                set_opt(sbi->s_mount_opt, ERRORS_CONT);
+                set_opt(sb, ERRORS_CONT);
         else
-                set_opt(sbi->s_mount_opt, ERRORS_RO);
+                set_opt(sb, ERRORS_RO);
         if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)
-                set_opt(sbi->s_mount_opt, BLOCK_VALIDITY);
+                set_opt(sb, BLOCK_VALIDITY);
         if (def_mount_opts & EXT4_DEFM_DISCARD)
-                set_opt(sbi->s_mount_opt, DISCARD);
+                set_opt(sb, DISCARD);
 
         sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
         sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
@@ -3113,7 +3126,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
         sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;
 
         if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0)
-                set_opt(sbi->s_mount_opt, BARRIER);
+                set_opt(sb, BARRIER);
 
         /*
          * enable delayed allocation by default
@@ -3121,7 +3134,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
          */
         if (!IS_EXT3_SB(sb) &&
             ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0))
-                set_opt(sbi->s_mount_opt, DELALLOC);
+                set_opt(sb, DELALLOC);
 
         if (!parse_options((char *) sbi->s_es->s_mount_opts, sb,
                            &journal_devnum, &journal_ioprio, NULL, 0)) {
@@ -3424,8 +3437,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
                        "suppressed and not mounted read-only");
                 goto failed_mount_wq;
         } else {
-                clear_opt(sbi->s_mount_opt, DATA_FLAGS);
-                set_opt(sbi->s_mount_opt, WRITEBACK_DATA);
+                clear_opt(sb, DATA_FLAGS);
+                set_opt(sb, WRITEBACK_DATA);
                 sbi->s_journal = NULL;
                 needs_recovery = 0;
                 goto no_journal;
@@ -3463,9 +3476,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
                  */
                 if (jbd2_journal_check_available_features
                     (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE))
-                        set_opt(sbi->s_mount_opt, ORDERED_DATA);
+                        set_opt(sb, ORDERED_DATA);
                 else
-                        set_opt(sbi->s_mount_opt, JOURNAL_DATA);
+                        set_opt(sb, JOURNAL_DATA);
                 break;
 
         case EXT4_MOUNT_ORDERED_DATA:
@@ -3555,18 +3568,18 @@ no_journal:
             (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) {
                 ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - "
                          "requested data journaling mode");
-                clear_opt(sbi->s_mount_opt, DELALLOC);
+                clear_opt(sb, DELALLOC);
         }
         if (test_opt(sb, DIOREAD_NOLOCK)) {
                 if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
                         ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock "
                                 "option - requested data journaling mode");
-                        clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK);
+                        clear_opt(sb, DIOREAD_NOLOCK);
                 }
                 if (sb->s_blocksize < PAGE_SIZE) {
                         ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock "
                                 "option - block size is too small");
-                        clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK);
+                        clear_opt(sb, DIOREAD_NOLOCK);
                 }
         }
 
@@ -4158,6 +4171,22 @@ static int ext4_unfreeze(struct super_block *sb)
         return 0;
 }
 
+/*
+ * Structure to save mount options for ext4_remount's benefit
+ */
+struct ext4_mount_options {
+        unsigned long s_mount_opt;
+        unsigned long s_mount_opt2;
+        uid_t s_resuid;
+        gid_t s_resgid;
+        unsigned long s_commit_interval;
+        u32 s_min_batch_time, s_max_batch_time;
+#ifdef CONFIG_QUOTA
+        int s_jquota_fmt;
+        char *s_qf_names[MAXQUOTAS];
+#endif
+};
+
 static int ext4_remount(struct super_block *sb, int *flags, char *data)
 {
         struct ext4_super_block *es;
@@ -4178,6 +4207,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
         lock_super(sb);
         old_sb_flags = sb->s_flags;
         old_opts.s_mount_opt = sbi->s_mount_opt;
+        old_opts.s_mount_opt2 = sbi->s_mount_opt2;
         old_opts.s_resuid = sbi->s_resuid;
         old_opts.s_resgid = sbi->s_resgid;
         old_opts.s_commit_interval = sbi->s_commit_interval;
@@ -4331,6 +4361,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 restore_opts:
         sb->s_flags = old_sb_flags;
         sbi->s_mount_opt = old_opts.s_mount_opt;
+        sbi->s_mount_opt2 = old_opts.s_mount_opt2;
         sbi->s_resuid = old_opts.s_resuid;
         sbi->s_resgid = old_opts.s_resgid;
         sbi->s_commit_interval = old_opts.s_commit_interval;