Whamcloud - gitweb
Merge branch 'maint' into next
[tools/e2fsprogs.git] / misc / tune2fs.c
index 10ce58f..9f0d437 100644 (file)
@@ -52,6 +52,9 @@ extern int optind;
 #include <sys/types.h>
 #include <libgen.h>
 #include <limits.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
 
 #include "ext2fs/ext2_fs.h"
 #include "ext2fs/ext2fs.h"
@@ -59,6 +62,7 @@ extern int optind;
 #include "et/com_err.h"
 #include "support/plausible.h"
 #include "support/quotaio.h"
+#include "support/devname.h"
 #include "uuid/uuid.h"
 #include "e2p/e2p.h"
 #include "util.h"
@@ -70,11 +74,34 @@ extern int optind;
 #define QOPT_ENABLE    (1)
 #define QOPT_DISABLE   (-1)
 
+#ifndef FS_IOC_SETFSLABEL
+#define FSLABEL_MAX 256
+#define FS_IOC_SETFSLABEL      _IOW(0x94, 50, char[FSLABEL_MAX])
+#endif
+
+#ifndef FS_IOC_GETFSLABEL
+#define FS_IOC_GETFSLABEL      _IOR(0x94, 49, char[FSLABEL_MAX])
+#endif
+
+struct fsuuid {
+       __u32   fsu_len;
+       __u32   fsu_flags;
+       __u8    fsu_uuid[];
+};
+
+#ifndef EXT4_IOC_GETFSUUID
+#define EXT4_IOC_GETFSUUID     _IOR('f', 44, struct fsuuid)
+#endif
+
+#ifndef EXT4_IOC_SETFSUUID
+#define EXT4_IOC_SETFSUUID     _IOW('f', 44, struct fsuuid)
+#endif
+
 extern int ask_yn(const char *string, int def);
 
 const char *program_name = "tune2fs";
 char *device_name;
-char *new_label, *new_last_mounted, *new_UUID;
+char *new_label, *new_last_mounted, *requested_uuid;
 char *io_options;
 static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
 static int m_flag, M_flag, Q_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
@@ -101,10 +128,12 @@ static int rewrite_checksums;
 static int feature_64bit;
 static int fsck_requested;
 static char *undo_file;
+int enabling_casefold;
 
-int journal_size, journal_flags;
+int journal_size, journal_fc_size, journal_flags;
 char *journal_device;
 static blk64_t journal_location = ~0LL;
+static e2_blkcnt_t orphan_file_blocks;
 
 static struct list_head blk_move_list;
 
@@ -116,24 +145,29 @@ struct blk_move {
 
 errcode_t ext2fs_run_ext3_journal(ext2_filsys *fs);
 
-static const char *please_fsck = N_("Please run e2fsck on the filesystem.\n");
+static const char *fsck_explain = N_("\nThis operation requires a freshly checked filesystem.\n");
+
+static const char *please_fsck = N_("Please run e2fsck -f on the filesystem.\n");
 static const char *please_dir_fsck =
-               N_("Please run e2fsck -D on the filesystem.\n");
+               N_("Please run e2fsck -fD on the filesystem.\n");
 
 #ifdef CONFIG_BUILD_FINDFS
 void do_findfs(int argc, char **argv);
 #endif
 
+#ifdef CONFIG_JBD_DEBUG                /* Enabled by configure --enable-jbd-debug */
+int journal_enable_debug = -1;
+#endif
+
 static void usage(void)
 {
        fprintf(stderr,
-               _("Usage: %s [-c max_mounts_count] [-e errors_behavior] "
+               _("Usage: %s [-c max_mounts_count] [-e errors_behavior] [-f] "
                  "[-g group]\n"
                  "\t[-i interval[d|m|w]] [-j] [-J journal_options] [-l]\n"
                  "\t[-m reserved_blocks_percent] [-o [^]mount_options[,...]]\n"
-                 "\t[-p mmp_update_interval] [-r reserved_blocks_count] "
-                 "[-u user]\n"
-                 "\t[-C mount_count] [-L volume_label] [-M last_mounted_dir]\n"
+                 "\t[-r reserved_blocks_count] [-u user] [-C mount_count]\n"
+                 "\t[-L volume_label] [-M last_mounted_dir]\n"
                  "\t[-O [^]feature[,...]] [-Q quota_options]\n"
                  "\t[-E extended-option[,...]] [-T last_check_time] "
                  "[-U UUID]\n\t[-I new_inode_size] [-z undo_file] device\n"),
@@ -144,15 +178,21 @@ static void usage(void)
 static __u32 ok_features[3] = {
        /* Compat */
        EXT3_FEATURE_COMPAT_HAS_JOURNAL |
-               EXT2_FEATURE_COMPAT_DIR_INDEX,
+               EXT2_FEATURE_COMPAT_DIR_INDEX |
+               EXT4_FEATURE_COMPAT_FAST_COMMIT |
+               EXT4_FEATURE_COMPAT_STABLE_INODES |
+               EXT4_FEATURE_COMPAT_ORPHAN_FILE,
        /* Incompat */
        EXT2_FEATURE_INCOMPAT_FILETYPE |
                EXT3_FEATURE_INCOMPAT_EXTENTS |
                EXT4_FEATURE_INCOMPAT_FLEX_BG |
+               EXT4_FEATURE_INCOMPAT_EA_INODE|
                EXT4_FEATURE_INCOMPAT_MMP |
                EXT4_FEATURE_INCOMPAT_64BIT |
                EXT4_FEATURE_INCOMPAT_ENCRYPT |
-               EXT4_FEATURE_INCOMPAT_CSUM_SEED,
+               EXT4_FEATURE_INCOMPAT_CSUM_SEED |
+               EXT4_FEATURE_INCOMPAT_LARGEDIR |
+               EXT4_FEATURE_INCOMPAT_CASEFOLD,
        /* R/O compat */
        EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
                EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
@@ -163,20 +203,24 @@ static __u32 ok_features[3] = {
                EXT4_FEATURE_RO_COMPAT_QUOTA |
                EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
                EXT4_FEATURE_RO_COMPAT_READONLY |
-               EXT4_FEATURE_RO_COMPAT_PROJECT
+               EXT4_FEATURE_RO_COMPAT_PROJECT |
+               EXT4_FEATURE_RO_COMPAT_VERITY
 };
 
 static __u32 clear_ok_features[3] = {
        /* Compat */
        EXT3_FEATURE_COMPAT_HAS_JOURNAL |
                EXT2_FEATURE_COMPAT_RESIZE_INODE |
-               EXT2_FEATURE_COMPAT_DIR_INDEX,
+               EXT2_FEATURE_COMPAT_DIR_INDEX |
+               EXT4_FEATURE_COMPAT_FAST_COMMIT |
+               EXT4_FEATURE_COMPAT_ORPHAN_FILE,
        /* Incompat */
        EXT2_FEATURE_INCOMPAT_FILETYPE |
                EXT4_FEATURE_INCOMPAT_FLEX_BG |
                EXT4_FEATURE_INCOMPAT_MMP |
                EXT4_FEATURE_INCOMPAT_64BIT |
-               EXT4_FEATURE_INCOMPAT_CSUM_SEED,
+               EXT4_FEATURE_INCOMPAT_CSUM_SEED |
+               EXT4_FEATURE_INCOMPAT_CASEFOLD,
        /* R/O compat */
        EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
                EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
@@ -184,6 +228,7 @@ static __u32 clear_ok_features[3] = {
                EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
                EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
                EXT4_FEATURE_RO_COMPAT_QUOTA |
+               EXT4_FEATURE_RO_COMPAT_PROJECT |
                EXT4_FEATURE_RO_COMPAT_METADATA_CSUM |
                EXT4_FEATURE_RO_COMPAT_READONLY
 };
@@ -209,8 +254,8 @@ static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
        }
 
        jsb = (journal_superblock_t *) buf;
-       if ((jsb->s_header.h_magic != (unsigned)ntohl(JFS_MAGIC_NUMBER)) ||
-           (jsb->s_header.h_blocktype != (unsigned)ntohl(JFS_SUPERBLOCK_V2))) {
+       if ((jsb->s_header.h_magic != (unsigned)ntohl(JBD2_MAGIC_NUMBER)) ||
+           (jsb->s_header.h_blocktype != (unsigned)ntohl(JBD2_SUPERBLOCK_V2))) {
                fputs(_("Journal superblock not found!\n"), stderr);
                return EXT2_ET_BAD_MAGIC;
        }
@@ -218,7 +263,7 @@ static int get_journal_sb(ext2_filsys jfs, char buf[SUPERBLOCK_SIZE])
        return 0;
 }
 
-static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JFS_USERS_SIZE],
+static __u8 *journal_user(__u8 uuid[UUID_SIZE], __u8 s_users[JBD2_USERS_SIZE],
                          int nr_users)
 {
        int i;
@@ -283,6 +328,12 @@ static int remove_journal_device(ext2_filsys fs)
        jsb = (journal_superblock_t *) buf;
        /* Find the filesystem UUID */
        nr_users = ntohl(jsb->s_nr_users);
+       if (nr_users > JBD2_USERS_MAX) {
+               fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
+                                "is too high (%d).\n"), nr_users);
+               commit_remove_journal = 1;
+               goto no_valid_journal;
+       }
 
        if (!journal_user(fs->super->s_uuid, jsb->s_users, nr_users)) {
                fputs(_("Filesystem's UUID not found on journal device.\n"),
@@ -350,7 +401,7 @@ static errcode_t remove_journal_inode(ext2_filsys fs)
 {
        struct ext2_inode       inode;
        errcode_t               retval;
-       ino_t                   ino = fs->super->s_journal_inum;
+       ext2_ino_t              ino = fs->super->s_journal_inum;
 
        retval = ext2fs_read_inode(fs, ino,  &inode);
        if (retval) {
@@ -373,6 +424,8 @@ static errcode_t remove_journal_inode(ext2_filsys fs)
                                _("while clearing journal inode"));
                        return retval;
                }
+               fs->super->s_overhead_clusters -=
+                       EXT2FS_NUM_B2C(fs, EXT2_I_SIZE(&inode) / fs->blocksize);
                memset(&inode, 0, sizeof(inode));
                ext2fs_mark_bb_dirty(fs);
                fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
@@ -408,24 +461,27 @@ static int update_mntopts(ext2_filsys fs, char *mntopts)
        return 0;
 }
 
-static void check_fsck_needed(ext2_filsys fs, const char *prompt)
+static int check_fsck_needed(ext2_filsys fs, const char *prompt)
 {
        /* Refuse to modify anything but a freshly checked valid filesystem. */
        if (!(fs->super->s_state & EXT2_VALID_FS) ||
            (fs->super->s_state & EXT2_ERROR_FS) ||
            (fs->super->s_lastcheck < fs->super->s_mtime)) {
-               printf("\n%s\n", _(please_fsck));
+               puts(_(fsck_explain));
+               puts(_(please_fsck));
                if (mount_flags & EXT2_MF_READONLY)
                        printf("%s", _("(and reboot afterwards!)\n"));
-               exit(1);
+               return 1;
        }
 
        /* Give the admin a few seconds to bail out of a dangerous op. */
        if (!getenv("TUNE2FS_FORCE_PROMPT") && (!isatty(0) || !isatty(1)))
-               return;
+               return 0;
 
        puts(prompt);
        proceed_question(5);
+
+       return 0;
 }
 
 static void request_dir_fsck_afterwards(ext2_filsys fs)
@@ -436,7 +492,8 @@ static void request_dir_fsck_afterwards(ext2_filsys fs)
                return;
        fsck_requested++;
        fs->super->s_state &= ~EXT2_VALID_FS;
-       printf("\n%s\n", _(please_dir_fsck));
+       puts(_(fsck_explain));
+       puts(_(please_dir_fsck));
        if (mount_flags & EXT2_MF_READONLY)
                printf("%s", _("(and reboot afterwards!)\n"));
 }
@@ -456,9 +513,6 @@ static void request_fsck_afterwards(ext2_filsys fs)
 
 static void convert_64bit(ext2_filsys fs, int direction)
 {
-       if (!direction)
-               return;
-
        /*
         * Is resize2fs going to demand a fsck run? Might as well tell the
         * user now.
@@ -483,64 +537,6 @@ static void convert_64bit(ext2_filsys fs, int direction)
                fprintf(stderr, _("' to disable 64-bit mode.\n"));
 }
 
-/* Rewrite extents */
-static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
-                                struct ext2_inode *inode)
-{
-       ext2_extent_handle_t    handle;
-       struct ext2fs_extent    extent;
-       errcode_t               errcode;
-       struct ext2_extent_info info;
-
-       if (!(inode->i_flags & EXT4_EXTENTS_FL) ||
-           !ext2fs_has_feature_metadata_csum(fs->super))
-               return 0;
-
-       errcode = ext2fs_extent_open(fs, ino, &handle);
-       if (errcode)
-               return errcode;
-
-       errcode = ext2fs_extent_get(handle, EXT2_EXTENT_ROOT, &extent);
-       if (errcode)
-               goto out;
-
-       do {
-               errcode = ext2fs_extent_get_info(handle, &info);
-               if (errcode)
-                       break;
-
-               /*
-                * If this is the first extent in an extent block that we
-                * haven't visited, rewrite the extent to force the ETB
-                * checksum to be rewritten.
-                */
-               if (info.curr_entry == 1 && info.curr_level != 0 &&
-                   !(extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)) {
-                       errcode = ext2fs_extent_replace(handle, 0, &extent);
-                       if (errcode)
-                               break;
-               }
-
-               /* Skip to the end of a block of leaf nodes */
-               if (extent.e_flags & EXT2_EXTENT_FLAGS_LEAF) {
-                       errcode = ext2fs_extent_get(handle,
-                                                   EXT2_EXTENT_LAST_SIB,
-                                                   &extent);
-                       if (errcode)
-                               break;
-               }
-
-               errcode = ext2fs_extent_get(handle, EXT2_EXTENT_NEXT, &extent);
-       } while (errcode == 0);
-
-out:
-       /* Ok if we run off the end */
-       if (errcode == EXT2_ET_EXTENT_NO_NEXT)
-               errcode = 0;
-       ext2fs_extent_free(handle);
-       return errcode;
-}
-
 /*
  * Rewrite directory blocks with checksums
  */
@@ -548,7 +544,8 @@ struct rewrite_dir_context {
        char *buf;
        errcode_t errcode;
        ext2_ino_t dir;
-       int is_htree;
+       int is_htree:1;
+       int clear_htree:1;
 };
 
 static int rewrite_dir_block(ext2_filsys fs,
@@ -567,8 +564,13 @@ static int rewrite_dir_block(ext2_filsys fs,
        if (ctx->errcode)
                return BLOCK_ABORT;
 
-       /* if htree node... */
-       if (ctx->is_htree)
+       /*
+        * if htree node... Note that if we are clearing htree structures from
+        * the directory, we treat the htree internal block as an ordinary leaf.
+        * The code below will do the right thing and make space for checksum
+        * there.
+        */
+       if (ctx->is_htree && !ctx->clear_htree)
                ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
                                         &dcl, &dcl_offset);
        if (dcl) {
@@ -697,7 +699,8 @@ static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
        if (retval)
                return retval;
 
-       ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
+       ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
+       ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
        ctx.dir = dir;
        ctx.errcode = 0;
        retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
@@ -708,121 +711,256 @@ static errcode_t rewrite_directory(ext2_filsys fs, ext2_ino_t dir,
        if (retval)
                return retval;
 
+       if (ctx.is_htree && ctx.clear_htree) {
+               inode->i_flags &= ~EXT2_INDEX_FL;
+               retval = ext2fs_write_inode(fs, dir, inode);
+               if (retval)
+                       return retval;
+       }
+
        return ctx.errcode;
 }
 
 /*
- * Forcibly set checksums in all inodes.
+ * Context information that does not change across rewrite_one_inode()
+ * invocations.
  */
-static void rewrite_inodes(ext2_filsys fs)
+struct rewrite_context {
+       ext2_filsys fs;
+       struct ext2_inode *zero_inode;
+       char *ea_buf;
+       int inode_size;
+};
+
+#define fatal_err(code, args...)               \
+       do {                                    \
+               com_err(__func__, code, args);  \
+               exit(1);                        \
+       } while (0);
+
+static void update_ea_inode_hash(struct rewrite_context *ctx, ext2_ino_t ino,
+                                struct ext2_inode *inode)
 {
-       int length = EXT2_INODE_SIZE(fs->super);
-       struct ext2_inode *inode, *zero;
-       char            *ea_buf;
-       ext2_inode_scan scan;
-       errcode_t       retval;
-       ext2_ino_t      ino;
-       blk64_t         file_acl_block;
-       int             inode_dirty;
+       errcode_t retval;
+       ext2_file_t file;
+       __u32 hash;
 
-       if (fs->super->s_creator_os != EXT2_OS_LINUX)
-               return;
+       retval = ext2fs_file_open(ctx->fs, ino, 0, &file);
+       if (retval)
+               fatal_err(retval, "open ea_inode");
+       retval = ext2fs_file_read(file, ctx->ea_buf, inode->i_size,
+                                 NULL);
+       if (retval)
+               fatal_err(retval, "read ea_inode");
+       retval = ext2fs_file_close(file);
+       if (retval)
+               fatal_err(retval, "close ea_inode");
 
-       retval = ext2fs_open_inode_scan(fs, 0, &scan);
-       if (retval) {
-               com_err("set_csum", retval, "while opening inode scan");
-               exit(1);
-       }
+       hash = ext2fs_crc32c_le(ctx->fs->csum_seed,
+                               (unsigned char *) ctx->ea_buf, inode->i_size);
+       ext2fs_set_ea_inode_hash(inode, hash);
+}
 
-       retval = ext2fs_get_mem(length, &inode);
-       if (retval) {
-               com_err("set_csum", retval, "while allocating memory");
-               exit(1);
+static int update_xattr_entry_hashes(ext2_filsys fs,
+                                    struct ext2_ext_attr_entry *entry,
+                                    struct ext2_ext_attr_entry *end)
+{
+       int modified = 0;
+       errcode_t retval;
+
+       while (entry < end && !EXT2_EXT_IS_LAST_ENTRY(entry)) {
+               if (entry->e_value_inum) {
+                       retval = ext2fs_ext_attr_hash_entry2(fs, entry, NULL,
+                                                            &entry->e_hash);
+                       if (retval)
+                               fatal_err(retval, "hash ea_inode entry");
+                       modified = 1;
+               }
+               entry = EXT2_EXT_ATTR_NEXT(entry);
        }
+       return modified;
+}
 
-       retval = ext2fs_get_memzero(length, &zero);
-       if (retval) {
-               com_err("set_csum", retval, "while allocating memory");
-               exit(1);
+static void update_inline_xattr_hashes(struct rewrite_context *ctx,
+                                      struct ext2_inode_large *inode)
+{
+       struct ext2_ext_attr_entry *start, *end;
+       __u32 *ea_magic;
+
+       if (inode->i_extra_isize == 0)
+               return;
+
+       if (inode->i_extra_isize & 3 ||
+           inode->i_extra_isize > ctx->inode_size - EXT2_GOOD_OLD_INODE_SIZE)
+               fatal_err(EXT2_ET_INODE_CORRUPTED, "bad i_extra_isize")
+
+       ea_magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
+                               inode->i_extra_isize);
+       if (*ea_magic != EXT2_EXT_ATTR_MAGIC)
+               return;
+
+       start = (struct ext2_ext_attr_entry *)(ea_magic + 1);
+       end = (struct ext2_ext_attr_entry *)((char *)inode + ctx->inode_size);
+
+       update_xattr_entry_hashes(ctx->fs, start, end);
+}
+
+static void update_block_xattr_hashes(struct rewrite_context *ctx,
+                                     char *block_buf)
+{
+       struct ext2_ext_attr_header *header;
+       struct ext2_ext_attr_entry *start, *end;
+
+       header = (struct ext2_ext_attr_header *)block_buf;
+       if (header->h_magic != EXT2_EXT_ATTR_MAGIC)
+               return;
+
+       start = (struct ext2_ext_attr_entry *)(header+1);
+       end = (struct ext2_ext_attr_entry *)(block_buf + ctx->fs->blocksize);
+
+       if (update_xattr_entry_hashes(ctx->fs, start, end))
+               ext2fs_ext_attr_block_rehash(header, end);
+}
+
+static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
+                             struct ext2_inode *inode)
+{
+       blk64_t file_acl_block;
+       errcode_t retval;
+
+       if (!ext2fs_test_inode_bitmap2(ctx->fs->inode_map, ino)) {
+               if (!memcmp(inode, ctx->zero_inode, ctx->inode_size))
+                       return;
+               memset(inode, 0, ctx->inode_size);
        }
 
-       retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
-       if (retval) {
-               com_err("set_csum", retval, "while allocating memory");
-               exit(1);
+       if (inode->i_flags & EXT4_EA_INODE_FL)
+               update_ea_inode_hash(ctx, ino, inode);
+
+       if (ctx->inode_size != EXT2_GOOD_OLD_INODE_SIZE)
+               update_inline_xattr_hashes(ctx,
+                                          (struct ext2_inode_large *)inode);
+
+       retval = ext2fs_write_inode_full(ctx->fs, ino, inode, ctx->inode_size);
+       if (retval)
+               fatal_err(retval, "while writing inode");
+
+       retval = ext2fs_fix_extents_checksums(ctx->fs, ino, inode);
+       if (retval)
+               fatal_err(retval, "while rewriting extents");
+
+       if (LINUX_S_ISDIR(inode->i_mode) &&
+           ext2fs_inode_has_valid_blocks2(ctx->fs, inode)) {
+               retval = rewrite_directory(ctx->fs, ino, inode);
+               if (retval)
+                       fatal_err(retval, "while rewriting directories");
        }
 
+       file_acl_block = ext2fs_file_acl_block(ctx->fs, inode);
+       if (!file_acl_block)
+               return;
+
+       retval = ext2fs_read_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
+                                      ino);
+       if (retval)
+               fatal_err(retval, "while rewriting extended attribute");
+
+       update_block_xattr_hashes(ctx, ctx->ea_buf);
+       retval = ext2fs_write_ext_attr3(ctx->fs, file_acl_block, ctx->ea_buf,
+                                       ino);
+       if (retval)
+               fatal_err(retval, "while rewriting extended attribute");
+}
+
+#define REWRITE_EA_FL          0x01    /* Rewrite EA inodes */
+#define REWRITE_DIR_FL         0x02    /* Rewrite directories */
+#define REWRITE_NONDIR_FL      0x04    /* Rewrite other inodes */
+#define REWRITE_ALL (REWRITE_EA_FL | REWRITE_DIR_FL | REWRITE_NONDIR_FL)
+
+static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
+{
+       ext2_inode_scan scan;
+       errcode_t       retval;
+       ext2_ino_t      ino;
+       struct ext2_inode *inode;
+       int rewrite;
+
+       retval = ext2fs_get_mem(ctx->inode_size, &inode);
+       if (retval)
+               fatal_err(retval, "while allocating memory");
+
+       retval = ext2fs_open_inode_scan(ctx->fs, 0, &scan);
+       if (retval)
+               fatal_err(retval, "while opening inode scan");
+
        do {
-               retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
-               if (retval) {
-                       com_err("set_csum", retval, "while getting next inode");
-                       exit(1);
-               }
+               retval = ext2fs_get_next_inode_full(scan, &ino, inode,
+                                                   ctx->inode_size);
+               if (retval)
+                       fatal_err(retval, "while getting next inode");
                if (!ino)
                        break;
-               if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
-                       inode_dirty = 1;
+
+               rewrite = 0;
+               if (inode->i_flags & EXT4_EA_INODE_FL) {
+                       if (flags & REWRITE_EA_FL)
+                               rewrite = 1;
+               } else if (LINUX_S_ISDIR(inode->i_mode)) {
+                       if (flags & REWRITE_DIR_FL)
+                               rewrite = 1;
                } else {
-                       if (memcmp(inode, zero, length) != 0) {
-                               memset(inode, 0, length);
-                               inode_dirty = 1;
-                       } else {
-                               inode_dirty = 0;
-                       }
+                       if (flags & REWRITE_NONDIR_FL)
+                               rewrite = 1;
                }
+               if (rewrite)
+                       rewrite_one_inode(ctx, ino, inode);
+       } while (ino);
+       ext2fs_close_inode_scan(scan);
+       ext2fs_free_mem(&inode);
+}
 
-               if (inode_dirty) {
-                       retval = ext2fs_write_inode_full(fs, ino, inode,
-                                                        length);
-                       if (retval) {
-                               com_err("set_csum", retval, "while writing "
-                                       "inode");
-                               exit(1);
-                       }
-               }
+/*
+ * Forcibly rewrite checksums in inodes specified by 'flags'
+ */
+static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
+{
+       struct rewrite_context ctx = {
+               .fs = fs,
+               .inode_size = EXT2_INODE_SIZE(fs->super),
+       };
+       errcode_t retval;
 
-               retval = rewrite_extents(fs, ino, inode);
-               if (retval) {
-                       com_err("rewrite_extents", retval,
-                               "while rewriting extents");
-                       exit(1);
-               }
+       if (fs->super->s_creator_os == EXT2_OS_HURD)
+               return;
 
-               if (LINUX_S_ISDIR(inode->i_mode) &&
-                   ext2fs_inode_has_valid_blocks2(fs, inode)) {
-                       retval = rewrite_directory(fs, ino, inode);
-                       if (retval) {
-                               com_err("rewrite_directory", retval,
-                                       "while rewriting directories");
-                               exit(1);
-                       }
-               }
+       retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
+       if (retval)
+               fatal_err(retval, "while allocating memory");
 
-               file_acl_block = ext2fs_file_acl_block(fs, inode);
-               if (!file_acl_block)
-                       continue;
-               retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
-               if (retval) {
-                       com_err("rewrite_eablock", retval,
-                               "while rewriting extended attribute");
-                       exit(1);
-               }
-               retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
-                                               ino);
-               if (retval) {
-                       com_err("rewrite_eablock", retval,
-                               "while rewriting extended attribute");
-                       exit(1);
-               }
-       } while (ino);
+       retval = ext2fs_get_mem(64 * 1024, &ctx.ea_buf);
+       if (retval)
+               fatal_err(retval, "while allocating memory");
 
-       ext2fs_free_mem(&zero);
-       ext2fs_free_mem(&inode);
-       ext2fs_free_mem(&ea_buf);
-       ext2fs_close_inode_scan(scan);
+       /*
+        * Extended attribute inodes have a lookup hash that needs to be
+        * recalculated with the new csum_seed. Other inodes referencing xattr
+        * inodes need this value to be up to date. That's why we do two passes:
+        *
+        * pass 1: update xattr inodes to update their lookup hash as well as
+        *         other checksums.
+        *
+        * pass 2: go over other inodes to update their checksums.
+        */
+       if (ext2fs_has_feature_ea_inode(fs->super) && (flags & REWRITE_EA_FL))
+               rewrite_inodes_pass(&ctx, REWRITE_EA_FL);
+       flags &= ~REWRITE_EA_FL;
+       rewrite_inodes_pass(&ctx, flags);
+
+       ext2fs_free_mem(&ctx.zero_inode);
+       ext2fs_free_mem(&ctx.ea_buf);
 }
 
-static void rewrite_metadata_checksums(ext2_filsys fs)
+static void rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
 {
        errcode_t retval;
        dgrp_t i;
@@ -832,12 +970,9 @@ static void rewrite_metadata_checksums(ext2_filsys fs)
        for (i = 0; i < fs->group_desc_count; i++)
                ext2fs_group_desc_csum_set(fs, i);
        retval = ext2fs_read_bitmaps(fs);
-       if (retval) {
-               com_err("rewrite_metadata_checksums", retval,
-                       "while reading bitmaps");
-               exit(1);
-       }
-       rewrite_inodes(fs);
+       if (retval)
+               fatal_err(retval, "while reading bitmaps");
+       rewrite_inodes(fs, flags);
        ext2fs_mark_ib_dirty(fs);
        ext2fs_mark_bb_dirty(fs);
        ext2fs_mmp_update2(fs, 1);
@@ -901,6 +1036,41 @@ out:
        return retval;
 }
 
+static int has_casefold_inode(ext2_filsys fs)
+{
+       int length = EXT2_INODE_SIZE(fs->super);
+       struct ext2_inode *inode = NULL;
+       ext2_inode_scan scan;
+       errcode_t       retval;
+       ext2_ino_t      ino;
+       int found_casefold = 0;
+
+       retval = ext2fs_get_mem(length, &inode);
+       if (retval)
+               fatal_err(retval, "while allocating memory");
+
+       retval = ext2fs_open_inode_scan(fs, 0, &scan);
+       if (retval)
+               fatal_err(retval, "while opening inode scan");
+
+       do {
+               retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
+               if (retval)
+                       fatal_err(retval, "while getting next inode");
+               if (!ino)
+                       break;
+
+               if(inode->i_flags & EXT4_CASEFOLD_FL) {
+                       found_casefold = 1;
+                       break;
+               }
+       } while(1);
+
+       ext2fs_free_mem(&inode);
+       ext2fs_close_inode_scan(scan);
+       return found_casefold;
+}
+
 static errcode_t disable_uninit_bg(ext2_filsys fs, __u32 csum_feature_flag)
 {
        struct ext2_group_desc *gd;
@@ -1041,6 +1211,56 @@ static int update_feature_set(ext2_filsys fs, char *features)
                }
        }
 
+       if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_ORPHAN_FILE)) {
+               ext2_ino_t ino;
+
+               if (mount_flags & EXT2_MF_MOUNTED) {
+                       fputs(_("The orphan_file feature may only be cleared "
+                               "when the filesystem is unmounted.\n"), stderr);
+                       return 1;
+               }
+               if (ext2fs_has_feature_orphan_present(sb) && f_flag < 2) {
+                       fputs(_("The orphan_present feature is set. Please "
+                               "run e2fsck before clearing orphan_file "
+                               "feature.\n"),
+                             stderr);
+                       return 1;
+               }
+               err = ext2fs_read_bitmaps(fs);
+               if (err) {
+                       com_err(program_name, err, "%s",
+                               _("while loading bitmaps"));
+                       return 1;
+               }
+               err = ext2fs_truncate_orphan_file(fs);
+               if (err) {
+                       com_err(program_name, err,
+                               _("\n\twhile trying to delete orphan file\n"));
+                       return 1;
+               }
+               ino = sb->s_orphan_file_inum;
+               sb->s_orphan_file_inum = 0;
+               ext2fs_inode_alloc_stats2(fs, ino, -1, 0);
+               ext2fs_clear_feature_orphan_file(sb);
+               ext2fs_clear_feature_orphan_present(sb);
+               ext2fs_mark_super_dirty(fs);
+       }
+
+       if (FEATURE_ON(E2P_FEATURE_COMPAT, EXT4_FEATURE_COMPAT_ORPHAN_FILE)) {
+               if (!ext2fs_has_feature_journal(sb)) {
+                       fputs(_("orphan_file feature can be set only for "
+                               "filesystems with journal.\n"), stderr);
+                       return 1;
+               }
+               /*
+                * If adding an orphan file, let the create orphan file
+                * code below handle setting the flag and creating it.
+                * We supply a default size if necessary.
+                */
+               orphan_file_blocks = ext2fs_default_orphan_file_blocks(fs);
+               ext2fs_set_feature_orphan_file(sb);
+       }
+
        if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
                EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
                if (ext2fs_has_feature_meta_bg(sb)) {
@@ -1136,6 +1356,24 @@ mmp_error:
                        uuid_generate((unsigned char *) sb->s_hash_seed);
        }
 
+       if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
+           ext2fs_has_feature_metadata_csum(sb)) {
+               if (check_fsck_needed(fs,
+                       _("Disabling directory index on filesystem with "
+                         "checksums could take some time.")))
+                       return 1;
+               if (mount_flags & EXT2_MF_MOUNTED) {
+                       fputs(_("Cannot disable dir_index on a mounted "
+                               "filesystem!\n"), stderr);
+                       exit(1);
+               }
+               /*
+                * Clearing dir_index on checksummed filesystem requires
+                * rewriting all directories to update checksums.
+                */
+               rewrite_checksums |= REWRITE_DIR_FL;
+       }
+
        if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
                if (ext2fs_check_desc(fs)) {
                        fputs(_("Clearing the flex_bg flag would "
@@ -1159,12 +1397,13 @@ mmp_error:
 
        if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
                       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
-               check_fsck_needed(fs,
-                       _("Enabling checksums could take some time."));
+               if (check_fsck_needed(fs,
+                       _("Enabling checksums could take some time.")))
+                       return 1;
                if (mount_flags & EXT2_MF_MOUNTED) {
                        fputs(_("Cannot enable metadata_csum on a mounted "
                                "filesystem!\n"), stderr);
-                       exit(1);
+                       return 1;
                }
                if (!ext2fs_has_feature_extents(fs->super))
                        printf("%s",
@@ -1179,7 +1418,7 @@ mmp_error:
                                 "The larger fields afforded by this feature "
                                 "enable full-strength checksumming.  "
                                 "Run resize2fs -b to rectify.\n"));
-               rewrite_checksums = 1;
+               rewrite_checksums = REWRITE_ALL;
                /* metadata_csum supersedes uninit_bg */
                ext2fs_clear_feature_gdt_csum(fs->super);
 
@@ -1200,14 +1439,15 @@ mmp_error:
                        EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
                __u32   test_features[3];
 
-               check_fsck_needed(fs,
-                       _("Disabling checksums could take some time."));
+               if (check_fsck_needed(fs,
+                       _("Disabling checksums could take some time.")))
+                       return 1;
                if (mount_flags & EXT2_MF_MOUNTED) {
                        fputs(_("Cannot disable metadata_csum on a mounted "
                                "filesystem!\n"), stderr);
-                       exit(1);
+                       return 1;
                }
-               rewrite_checksums = 1;
+               rewrite_checksums = REWRITE_ALL;
 
                /* Enable uninit_bg unless the user expressly turned it off */
                memcpy(test_features, old_features, sizeof(test_features));
@@ -1243,6 +1483,12 @@ mmp_error:
 
        if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
                       EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+               if (mount_flags & EXT2_MF_MOUNTED) {
+                       fputs(_("Cannot enable uninit_bg on a mounted "
+                               "filesystem!\n"), stderr);
+                       return 1;
+               }
+
                /* Do not enable uninit_bg when metadata_csum enabled */
                if (ext2fs_has_feature_metadata_csum(fs->super))
                        ext2fs_clear_feature_gdt_csum(fs->super);
@@ -1252,6 +1498,12 @@ mmp_error:
 
        if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
                        EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+               if (mount_flags & EXT2_MF_MOUNTED) {
+                       fputs(_("Cannot disable uninit_bg on a mounted "
+                               "filesystem!\n"), stderr);
+                       return 1;
+               }
+
                err = disable_uninit_bg(fs,
                                EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
                if (err)
@@ -1268,7 +1520,7 @@ mmp_error:
                if (mount_flags & EXT2_MF_MOUNTED) {
                        fprintf(stderr, _("Cannot enable 64-bit mode "
                                          "while mounted!\n"));
-                       exit(1);
+                       return 1;
                }
                ext2fs_clear_feature_64bit(sb);
                feature_64bit = 1;
@@ -1278,7 +1530,7 @@ mmp_error:
                if (mount_flags & EXT2_MF_MOUNTED) {
                        fprintf(stderr, _("Cannot disable 64-bit mode "
                                          "while mounted!\n"));
-                       exit(1);
+                       return 1;
                }
                ext2fs_set_feature_64bit(sb);
                feature_64bit = -1;
@@ -1304,15 +1556,23 @@ mmp_error:
        }
 
        if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
-                               EXT4_FEATURE_RO_COMPAT_PROJECT)) {
-               if (!Q_flag && !ext2fs_has_feature_quota(sb))
-                       fputs(_("\nWarning: enabled project without quota together\n"),
-                               stderr);
+                      EXT4_FEATURE_RO_COMPAT_PROJECT)) {
+               if (fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
+                       fprintf(stderr, _("Cannot enable project feature; "
+                                         "inode size too small.\n"));
+                       return 1;
+               }
                Q_flag = 1;
                quota_enable[PRJQUOTA] = QOPT_ENABLE;
        }
 
        if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+                       EXT4_FEATURE_RO_COMPAT_PROJECT)) {
+               Q_flag = 1;
+               quota_enable[PRJQUOTA] = QOPT_DISABLE;
+       }
+
+       if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
                                EXT4_FEATURE_RO_COMPAT_QUOTA)) {
                /*
                 * Set the Q_flag here and handle the quota options in the code
@@ -1334,6 +1594,33 @@ mmp_error:
                        EXT4_ENCRYPTION_MODE_AES_256_CTS;
        }
 
+       if (FEATURE_ON(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
+               if (mount_flags & EXT2_MF_MOUNTED) {
+                       fputs(_("The casefold feature may only be enabled when "
+                               "the filesystem is unmounted.\n"), stderr);
+                       return 1;
+               }
+               fs->super->s_encoding = EXT4_ENC_UTF8_12_1;
+               fs->super->s_encoding_flags = e2p_get_encoding_flags(EXT4_ENC_UTF8_12_1);
+               enabling_casefold = 1;
+       }
+
+       if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_CASEFOLD)) {
+               if (mount_flags & EXT2_MF_MOUNTED) {
+                       fputs(_("The casefold feature may only be disabled when "
+                               "the filesystem is unmounted.\n"), stderr);
+                       return 1;
+               }
+               if (has_casefold_inode(fs)) {
+                       fputs(_("The casefold feature can't be cleared when "
+                                       "there are inodes with +F flag.\n"), stderr);
+                       return 1;
+               }
+               fs->super->s_encoding = 0;
+               fs->super->s_encoding_flags = 0;
+               enabling_casefold = 0;
+       }
+
        if (FEATURE_ON(E2P_FEATURE_INCOMPAT,
                EXT4_FEATURE_INCOMPAT_CSUM_SEED)) {
                if (!ext2fs_has_feature_metadata_csum(sb)) {
@@ -1353,16 +1640,19 @@ mmp_error:
 
                uuid_seed = ext2fs_crc32c_le(~0, fs->super->s_uuid,
                                        sizeof(fs->super->s_uuid));
-               if (fs->super->s_checksum_seed != uuid_seed &&
-                   (mount_flags & EXT2_MF_MOUNTED)) {
-                       fputs(_("UUID has changed since enabling "
-                               "metadata_csum.  Filesystem must be unmounted "
-                               "\nto safely rewrite all metadata to "
-                               "match the new UUID.\n"), stderr);
-                       return 1;
+               if (fs->super->s_checksum_seed != uuid_seed) {
+                       if (mount_flags & (EXT2_MF_BUSY|EXT2_MF_MOUNTED)) {
+                               fputs(_("UUID has changed since enabling "
+               "metadata_csum.  Filesystem must be unmounted "
+               "\nto safely rewrite all metadata to match the new UUID.\n"),
+                                     stderr);
+                               return 1;
+                       }
+                       if (check_fsck_needed(fs, _("Recalculating checksums "
+                                                   "could take some time.")))
+                               return 1;
+                       rewrite_checksums = REWRITE_ALL;
                }
-
-               rewrite_checksums = 1;
        }
 
        if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
@@ -1395,7 +1685,7 @@ mmp_error:
  */
 static int add_journal(ext2_filsys fs)
 {
-       unsigned long journal_blocks;
+       struct ext2fs_journal_params    jparams;
        errcode_t       retval;
        ext2_filsys     jfs;
        io_manager      io_ptr;
@@ -1441,13 +1731,13 @@ static int add_journal(ext2_filsys fs)
        } else if (journal_size) {
                fputs(_("Creating journal inode: "), stdout);
                fflush(stdout);
-               journal_blocks = figure_journal_size(journal_size, fs);
+               figure_journal_size(&jparams, journal_size, journal_fc_size, fs);
 
                if (journal_location_string)
                        journal_location =
                                parse_num_blocks2(journal_location_string,
                                                  fs->super->s_log_block_size);
-               retval = ext2fs_add_journal_inode2(fs, journal_blocks,
+               retval = ext2fs_add_journal_inode3(fs, &jparams,
                                                   journal_location,
                                                   journal_flags);
                if (retval) {
@@ -1455,8 +1745,12 @@ static int add_journal(ext2_filsys fs)
                        com_err(program_name, retval, "%s",
                                _("\n\twhile trying to create journal file"));
                        return retval;
-               } else
-                       fputs(_("done\n"), stdout);
+               }
+               fs->super->s_overhead_clusters += EXT2FS_NUM_B2C(fs,
+                       jparams.num_journal_blocks + jparams.num_fc_blocks);
+               ext2fs_mark_super_dirty(fs);
+               fputs(_("done\n"), stdout);
+
                /*
                 * If the filesystem wasn't mounted, we need to force
                 * the block group descriptors out.
@@ -1473,61 +1767,110 @@ err:
        return 1;
 }
 
-static void handle_quota_options(ext2_filsys fs)
+static int handle_quota_options(ext2_filsys fs)
 {
+       errcode_t retval;
        quota_ctx_t qctx;
        ext2_ino_t qf_ino;
        enum quota_type qtype;
-       int enable = 0;
+       unsigned int qtype_bits = 0;
+       int need_dirty = 0;
 
        for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
                if (quota_enable[qtype] != 0)
                        break;
        if (qtype == MAXQUOTAS)
                /* Nothing to do. */
-               return;
+               return 0;
 
-       quota_init_context(&qctx, fs, QUOTA_ALL_BIT);
-       for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
-               if (quota_enable[qtype] == QOPT_ENABLE) {
-                       enable = 1;
-                       break;
-               }
+       if (quota_enable[PRJQUOTA] == QOPT_ENABLE &&
+           fs->super->s_inode_size == EXT2_GOOD_OLD_INODE_SIZE) {
+               fprintf(stderr, _("Cannot enable project quota; "
+                                 "inode size too small.\n"));
+               return 1;
+       }
+
+       for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+               if (quota_enable[qtype] == QOPT_ENABLE)
+                       qtype_bits |= 1 << qtype;
        }
-       if (enable)
+
+       retval = quota_init_context(&qctx, fs, qtype_bits);
+       if (retval) {
+               com_err(program_name, retval,
+                       _("while initializing quota context in support library"));
+               return 1;
+       }
+
+       if (qtype_bits)
                quota_compute_usage(qctx);
 
        for (qtype = 0 ; qtype < MAXQUOTAS; qtype++) {
                if (quota_enable[qtype] == QOPT_ENABLE &&
                    *quota_sb_inump(fs->super, qtype) == 0) {
-                       if ((qf_ino = quota_file_exists(fs, qtype)) > 0)
-                               quota_update_limits(qctx, qf_ino, qtype);
-                       quota_write_inode(qctx, 1 << qtype);
+                       if ((qf_ino = quota_file_exists(fs, qtype)) > 0) {
+                               retval = quota_read_all_dquots(qctx, qf_ino,
+                                                              qtype,
+                                                              QREAD_LIMITS);
+                               if (retval) {
+                                       com_err(program_name, retval,
+                                               _("while updating quota limits (%d)"),
+                                               qtype);
+                               quota_errout:
+                                       quota_release_context(&qctx);
+                                       return 1;
+                               }
+                       }
+                       retval = quota_write_inode(qctx, 1 << qtype);
+                       if (retval) {
+                               com_err(program_name, retval,
+                                       _("while writing quota file (%d)"),
+                                       qtype);
+                               goto quota_errout;
+                       }
+                       /* Enable Quota feature if one of quota enabled */
+                       if (!ext2fs_has_feature_quota(fs->super)) {
+                               ext2fs_set_feature_quota(fs->super);
+                               need_dirty = 1;
+                       }
+                       if (qtype == PRJQUOTA &&
+                           !ext2fs_has_feature_project(fs->super)) {
+                               ext2fs_set_feature_project(fs->super);
+                               need_dirty = 1;
+                       }
                } else if (quota_enable[qtype] == QOPT_DISABLE) {
-                       quota_remove_inode(fs, qtype);
+                       retval = quota_remove_inode(fs, qtype);
+                       if (retval) {
+                               com_err(program_name, retval,
+                                       _("while removing quota file (%d)"),
+                                       qtype);
+                               goto quota_errout;
+                       }
+                       if (qtype == PRJQUOTA) {
+                               ext2fs_clear_feature_project(fs->super);
+                               need_dirty = 1;
+                       }
                }
        }
 
        quota_release_context(&qctx);
-
-       if (enable) {
-               ext2fs_set_feature_quota(fs->super);
-               ext2fs_mark_super_dirty(fs);
-       } else {
+       /* Clear Quota feature if all quota types disabled. */
+       if (!qtype_bits) {
                for (qtype = 0 ; qtype < MAXQUOTAS; qtype++)
-                       if (*quota_sb_inump(fs->super, qtype) != 0)
+                       if (*quota_sb_inump(fs->super, qtype))
                                break;
                if (qtype == MAXQUOTAS) {
-                       fs->super->s_feature_ro_compat &=
-                                       ~EXT4_FEATURE_RO_COMPAT_QUOTA;
-                       ext2fs_mark_super_dirty(fs);
+                       ext2fs_clear_feature_quota(fs->super);
+                       need_dirty = 1;
                }
-       }
 
-       return;
+       }
+       if (need_dirty)
+               ext2fs_mark_super_dirty(fs);
+       return 0;
 }
 
-static int option_handle_function(char *token, void *data)
+static int option_handle_function(char *token)
 {
        if (strncmp(token, "usr", 3) == 0) {
                quota_enable[USRQUOTA] = QOPT_ENABLE;
@@ -1563,13 +1906,13 @@ static void parse_e2label_options(int argc, char ** argv)
        io_options = strchr(argv[1], '?');
        if (io_options)
                *io_options++ = 0;
-       device_name = blkid_get_devname(NULL, argv[1], NULL);
+       device_name = get_devname(NULL, argv[1], NULL);
        if (!device_name) {
                com_err("e2label", 0, _("Unable to resolve '%s'"),
                        argv[1]);
                exit(1);
        }
-       open_flag = EXT2_FLAG_JOURNAL_DEV_OK;
+       open_flag = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SUPER_ONLY;
        if (argc == 3) {
                open_flag |= EXT2_FLAG_RW;
                L_flag = 1;
@@ -1622,8 +1965,15 @@ static void parse_tune2fs_options(int argc, char **argv)
        while ((c = getopt(argc, argv, optstring)) != EOF)
                switch (c) {
                case 'c':
+                       open_flag = EXT2_FLAG_RW;
+                       c_flag = 1;
+                       if (strcmp(optarg, "random") == 0) {
+                               max_mount_count = 65536;
+                               break;
+                       }
                        max_mount_count = strtol(optarg, &tmp, 0);
-                       if (*tmp || max_mount_count > 16000) {
+                       if (*tmp || max_mount_count > 16000 ||
+                           max_mount_count < -16000) {
                                com_err(program_name, 0,
                                        _("bad mounts count - %s"),
                                        optarg);
@@ -1631,8 +1981,6 @@ static void parse_tune2fs_options(int argc, char **argv)
                        }
                        if (max_mount_count == 0)
                                max_mount_count = -1;
-                       c_flag = 1;
-                       open_flag = EXT2_FLAG_RW;
                        break;
                case 'C':
                        mount_count = strtoul(optarg, &tmp, 0);
@@ -1775,8 +2123,7 @@ static void parse_tune2fs_options(int argc, char **argv)
                        break;
                case 'Q':
                        Q_flag = 1;
-                       ret = parse_quota_opts(optarg, option_handle_function,
-                                              NULL);
+                       ret = parse_quota_opts(optarg, option_handle_function);
                        if (ret)
                                exit(1);
                        open_flag = EXT2_FLAG_RW;
@@ -1822,7 +2169,7 @@ static void parse_tune2fs_options(int argc, char **argv)
                                open_flag = EXT2_FLAG_RW;
                                break;
                case 'U':
-                       new_UUID = optarg;
+                       requested_uuid = optarg;
                        U_flag = 1;
                        open_flag = EXT2_FLAG_RW |
                                EXT2_FLAG_JOURNAL_DEV_OK;
@@ -1859,7 +2206,7 @@ static void parse_tune2fs_options(int argc, char **argv)
        io_options = strchr(argv[optind], '?');
        if (io_options)
                *io_options++ = 0;
-       device_name = blkid_get_devname(NULL, argv[optind], NULL);
+       device_name = get_devname(NULL, argv[optind], NULL);
        if (!device_name) {
                com_err(program_name, 0, _("Unable to resolve '%s'"),
                        argv[optind]);
@@ -1890,9 +2237,12 @@ void do_findfs(int argc, char **argv)
 
 static int parse_extended_opts(ext2_filsys fs, const char *opts)
 {
+       struct ext2_super_block *sb = fs->super;
        char    *buf, *token, *next, *p, *arg;
        int     len, hash_alg;
        int     r_usage = 0;
+       int encoding = 0;
+       char    *encoding_flags = NULL;
 
        len = strlen(opts);
        buf = malloc(len+1);
@@ -1945,14 +2295,18 @@ static int parse_extended_opts(ext2_filsys fs, const char *opts)
                                  "Setting multiple mount protection update "
                                  "interval to %lu seconds\n", intv),
                               intv);
-                       fs->super->s_mmp_update_interval = intv;
+                       sb->s_mmp_update_interval = intv;
+                       ext2fs_mark_super_dirty(fs);
+               } else if (!strcmp(token, "force_fsck")) {
+                       sb->s_state |= EXT2_ERROR_FS;
+                       printf(_("Setting filesystem error flag to force fsck.\n"));
                        ext2fs_mark_super_dirty(fs);
                } else if (!strcmp(token, "test_fs")) {
-                       fs->super->s_flags |= EXT2_FLAGS_TEST_FILESYS;
+                       sb->s_flags |= EXT2_FLAGS_TEST_FILESYS;
                        printf("Setting test filesystem flag\n");
                        ext2fs_mark_super_dirty(fs);
                } else if (!strcmp(token, "^test_fs")) {
-                       fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
+                       sb->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
                        printf("Clearing test filesystem flag\n");
                        ext2fs_mark_super_dirty(fs);
                } else if (strcmp(token, "stride") == 0) {
@@ -1998,7 +2352,7 @@ static int parse_extended_opts(ext2_filsys fs, const char *opts)
                                r_usage++;
                                continue;
                        }
-                       fs->super->s_def_hash_version = hash_alg;
+                       sb->s_def_hash_version = hash_alg;
                        printf(_("Setting default hash algorithm "
                                 "to %s (%d)\n"),
                               arg, hash_alg);
@@ -2014,9 +2368,78 @@ static int parse_extended_opts(ext2_filsys fs, const char *opts)
                                continue;
                        }
                        ext_mount_opts = strdup(arg);
+               } else if (!strcmp(token, "encoding")) {
+                       if (!arg) {
+                               r_usage++;
+                               continue;
+                       }
+                       if (mount_flags & EXT2_MF_MOUNTED) {
+                               fputs(_("The casefold feature may only be enabled when "
+                                       "the filesystem is unmounted.\n"), stderr);
+                               r_usage++;
+                               continue;
+                       }
+                       if (ext2fs_has_feature_casefold(sb) && !enabling_casefold) {
+                               fprintf(stderr, _("Cannot alter existing encoding\n"));
+                               r_usage++;
+                               continue;
+                       }
+                       encoding = e2p_str2encoding(arg);
+                       if (encoding < 0) {
+                               fprintf(stderr, _("Invalid encoding: %s\n"), arg);
+                               r_usage++;
+                               continue;
+                       }
+                       enabling_casefold = 1;
+                       sb->s_encoding = encoding;
+                       printf(_("Setting encoding to '%s'\n"), arg);
+                       sb->s_encoding_flags =
+                               e2p_get_encoding_flags(sb->s_encoding);
+               } else if (!strcmp(token, "encoding_flags")) {
+                       if (!arg) {
+                               r_usage++;
+                               continue;
+                       }
+                       encoding_flags = arg;
+               } else if (!strcmp(token, "orphan_file_size")) {
+                       if (!arg) {
+                               r_usage++;
+                               continue;
+                       }
+                       orphan_file_blocks = parse_num_blocks2(arg,
+                                                fs->super->s_log_block_size);
+
+                       if (orphan_file_blocks < 1) {
+                               fprintf(stderr,
+                                       _("Invalid size of orphan file %s\n"),
+                                       arg);
+                               r_usage++;
+                               continue;
+                       }
                } else
                        r_usage++;
        }
+
+       if (encoding > 0 && !r_usage) {
+               sb->s_encoding_flags =
+                       e2p_get_encoding_flags(sb->s_encoding);
+
+               if (encoding_flags &&
+                   e2p_str2encoding_flags(sb->s_encoding, encoding_flags,
+                                          &sb->s_encoding_flags)) {
+                       fprintf(stderr, _("error: Invalid encoding flag: %s\n"),
+                                       encoding_flags);
+                       r_usage++;
+               } else if (encoding_flags)
+                       printf(_("Setting encoding_flags to '%s'\n"),
+                                encoding_flags);
+               ext2fs_set_feature_casefold(sb);
+               ext2fs_mark_super_dirty(fs);
+       } else if (encoding_flags && !r_usage) {
+               fprintf(stderr, _("error: An encoding must be explicitly "
+                                 "specified when passing encoding-flags\n"));
+               r_usage++;
+       }
        if (r_usage) {
                fprintf(stderr, "%s", _("\nBad options specified.\n\n"
                        "Extended options are separated by commas, "
@@ -2026,10 +2449,14 @@ static int parse_extended_opts(ext2_filsys fs, const char *opts)
                        "\tclear_mmp\n"
                        "\thash_alg=<hash algorithm>\n"
                        "\tmount_opts=<extended default mount options>\n"
+                       "\tmmp_update_interval=<mmp update interval in seconds>\n"
                        "\tstride=<RAID per-disk chunk size in blocks>\n"
                        "\tstripe_width=<RAID stride*data disks in blocks>\n"
+                       "\tforce_fsck\n"
                        "\ttest_fs\n"
-                       "\t^test_fs\n"));
+                       "\t^test_fs\n"
+                       "\tencoding=<encoding>\n"
+                       "\tencoding_flags=<flags>\n"));
                free(buf);
                return 1;
        }
@@ -2404,63 +2831,6 @@ err_out:
        return retval;
 }
 
-static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs)
-{
-       blk64_t         blk;
-       ext2_ino_t      ino;
-       unsigned int    group = 0;
-       unsigned int    count = 0;
-       int             total_free = 0;
-       int             group_free = 0;
-
-       /*
-        * First calculate the block statistics
-        */
-       for (blk = fs->super->s_first_data_block;
-            blk < ext2fs_blocks_count(fs->super); blk++) {
-               if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) {
-                       group_free++;
-                       total_free++;
-               }
-               count++;
-               if ((count == fs->super->s_blocks_per_group) ||
-                   (blk == ext2fs_blocks_count(fs->super)-1)) {
-                       ext2fs_bg_free_blocks_count_set(fs, group++,
-                                                       group_free);
-                       count = 0;
-                       group_free = 0;
-               }
-       }
-       total_free = EXT2FS_C2B(fs, total_free);
-       ext2fs_free_blocks_count_set(fs->super, total_free);
-
-       /*
-        * Next, calculate the inode statistics
-        */
-       group_free = 0;
-       total_free = 0;
-       count = 0;
-       group = 0;
-
-       /* Protect loop from wrap-around if s_inodes_count maxed */
-       for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) {
-               if (!ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) {
-                       group_free++;
-                       total_free++;
-               }
-               count++;
-               if ((count == fs->super->s_inodes_per_group) ||
-                   (ino == fs->super->s_inodes_count)) {
-                       ext2fs_bg_free_inodes_count_set(fs, group++,
-                                                       group_free);
-                       count = 0;
-                       group_free = 0;
-               }
-       }
-       fs->super->s_free_inodes_count = total_free;
-       ext2fs_mark_super_dirty(fs);
-       return 0;
-}
 
 #define list_for_each_safe(pos, pnext, head) \
        for (pos = (head)->next, pnext = pos->next; pos != (head); \
@@ -2539,7 +2909,7 @@ static int resize_inode(ext2_filsys fs, unsigned long new_size)
        if (retval)
                goto err_out_undo;
 
-       ext2fs_calculate_summary_stats(fs);
+       ext2fs_calculate_summary_stats(fs, 1 /* super only */);
 
        fs->super->s_state |= EXT2_VALID_FS;
        /* mark super block and block bitmap as dirty */
@@ -2677,6 +3047,11 @@ fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
        jsb = (journal_superblock_t *) buf;
        /* Find the filesystem UUID */
        nr_users = ntohl(jsb->s_nr_users);
+       if (nr_users > JBD2_USERS_MAX) {
+               fprintf(stderr, _("Journal superblock is corrupted, nr_users\n"
+                                "is too high (%d).\n"), nr_users);
+               return EXT2_ET_CORRUPT_JOURNAL_SB;
+       }
 
        j_uuid = journal_user(old_uuid, jsb->s_users, nr_users);
        if (j_uuid == NULL) {
@@ -2701,6 +3076,79 @@ fs_update_journal_user(struct ext2_super_block *sb, __u8 old_uuid[UUID_SIZE])
        return 0;
 }
 
+/*
+ * Use FS_IOC_SETFSLABEL or FS_IOC_GETFSLABEL to set/get file system label
+ * Return:     0 on success
+ *             1 on error
+ *             -1 when the old method should be used
+ */
+int handle_fslabel(int setlabel) {
+       errcode_t ret;
+       int mnt_flags, fd;
+       char label[FSLABEL_MAX];
+       int maxlen = FSLABEL_MAX - 1;
+       char mntpt[PATH_MAX + 1];
+
+#ifdef __linux__
+       ret = ext2fs_check_mount_point(device_name, &mnt_flags,
+                                         mntpt, sizeof(mntpt));
+       if (ret) {
+               com_err(device_name, ret, _("while checking mount status"));
+               return 1;
+       }
+       if (!(mnt_flags & EXT2_MF_MOUNTED) ||
+           (setlabel && (mnt_flags & EXT2_MF_READONLY)))
+               return -1;
+
+       if (!mntpt[0]) {
+               fprintf(stderr,_("Unknown mount point for %s\n"), device_name);
+               return 1;
+       }
+
+       fd = open(mntpt, O_RDONLY);
+       if (fd < 0) {
+               com_err(mntpt, errno, _("while opening mount point"));
+               return 1;
+       }
+
+       /* Get fs label */
+       if (!setlabel) {
+               if (ioctl(fd, FS_IOC_GETFSLABEL, &label)) {
+                       close(fd);
+                       if (errno == ENOTTY)
+                               return -1;
+                       com_err(mntpt, errno, _("while trying to get fs label"));
+                       return 1;
+               }
+               close(fd);
+               printf("%.*s\n", EXT2_LEN_STR(label));
+               return 0;
+       }
+
+       /* If it's extN file system, truncate the label to appropriate size */
+       if (mnt_flags & EXT2_MF_EXTFS)
+               maxlen = EXT2_LABEL_LEN;
+       if (strlen(new_label) > maxlen) {
+               fputs(_("Warning: label too long, truncating.\n"),
+                     stderr);
+               new_label[maxlen] = '\0';
+       }
+
+       /* Set fs label */
+       if (ioctl(fd, FS_IOC_SETFSLABEL, new_label)) {
+               close(fd);
+               if (errno == ENOTTY)
+                       return -1;
+               com_err(mntpt, errno, _("while trying to set fs label"));
+               return 1;
+       }
+       close(fd);
+       return 0;
+#else
+       return -1;
+#endif
+}
+
 #ifndef BUILD_AS_LIB
 int main(int argc, char **argv)
 #else
@@ -2713,6 +3161,9 @@ int tune2fs_main(int argc, char **argv)
        io_manager io_ptr, io_ptr_orig = NULL;
        int rc = 0;
        char default_undo_file[1] = { 0 };
+       char mntpt[PATH_MAX + 1] = { 0 };
+       int fd = -1;
+       struct fsuuid *fsuuid = NULL;
 
 #ifdef ENABLE_NLS
        setlocale(LC_MESSAGES, "");
@@ -2723,6 +3174,8 @@ int tune2fs_main(int argc, char **argv)
 #endif
        if (argc && *argv)
                program_name = *argv;
+       else
+               usage();
        add_error_table(&et_ext2_error_table);
 
 #ifdef CONFIG_BUILD_FINDFS
@@ -2742,11 +3195,27 @@ int tune2fs_main(int argc, char **argv)
 #endif
                io_ptr = unix_io_manager;
 
+       /*
+        * Try the get/set fs label using ioctls before we even attempt
+        * to open the file system.
+        */
+       if (L_flag || print_label) {
+               rc = handle_fslabel(L_flag);
+               if (rc != -1) {
+#ifndef BUILD_AS_LIB
+                       exit(rc);
+#endif
+                       return rc;
+               }
+               rc = 0;
+       }
+
 retry_open:
        if ((open_flag & EXT2_FLAG_RW) == 0 || f_flag)
                open_flag |= EXT2_FLAG_SKIP_MMP;
 
-       open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK;
+       open_flag |= EXT2_FLAG_64BITS | EXT2_FLAG_THREADS |
+               EXT2_FLAG_JOURNAL_DEV_OK;
 
        /* keep the filesystem struct around to dump MMP data */
        open_flag |= EXT2_FLAG_NOFREE_ON_ERROR;
@@ -2809,8 +3278,10 @@ retry_open:
                        rc = 1;
                        goto closefs;
                }
-               check_fsck_needed(fs,
+               rc = check_fsck_needed(fs,
                        _("Resizing inodes could take some time."));
+               if (rc)
+                       goto closefs;
                /*
                 * If inode resize is requested use the
                 * Undo I/O manager
@@ -2837,24 +3308,58 @@ retry_open:
 
        if (print_label) {
                /* For e2label emulation */
-               printf("%.*s\n", (int) sizeof(sb->s_volume_name),
-                      sb->s_volume_name);
+               printf("%.*s\n", EXT2_LEN_STR(sb->s_volume_name));
                remove_error_table(&et_ext2_error_table);
                goto closefs;
        }
 
-       retval = ext2fs_check_if_mounted(device_name, &mount_flags);
+       retval = ext2fs_check_mount_point(device_name, &mount_flags,
+                                       mntpt, sizeof(mntpt));
        if (retval) {
-               com_err("ext2fs_check_if_mount", retval,
+               com_err("ext2fs_check_mount_point", retval,
                        _("while determining whether %s is mounted."),
                        device_name);
                rc = 1;
                goto closefs;
        }
+
+#ifdef NO_RECOVERY
+       /* Warn if file system needs recovery and it is opened for writing. */
+       if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
+           (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
+           (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
+               fprintf(stderr,
+_("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
+  "\te2fsck -E journal_only %s\n\n"
+  "then rerun this command.  Otherwise, any changes made may be overwritten\n"
+  "by journal recovery.\n"), device_name);
+       }
+#else
+       /* Recover the journal if possible. */
+       if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & (EXT2_MF_BUSY | EXT2_MF_MOUNTED)) &&
+           ext2fs_has_feature_journal_needs_recovery(fs->super)) {
+               printf(_("Recovering journal.\n"));
+               retval = ext2fs_run_ext3_journal(&fs);
+               if (retval) {
+                       com_err("tune2fs", retval,
+                               "while recovering journal.\n");
+                       printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
+                       if (fs)
+                               ext2fs_close_free(&fs);
+                       rc = 1;
+                       goto closefs;
+               }
+               sb = fs->super;
+       }
+#endif
+
        /* Normally we only need to write out the superblock */
        fs->flags |= EXT2_FLAG_SUPER_ONLY;
 
        if (c_flag) {
+               if (max_mount_count == 65536)
+                       max_mount_count = EXT2_DFL_MAX_MNT_COUNT +
+                               (random() % EXT2_DFL_MAX_MNT_COUNT);
                sb->s_max_mnt_count = max_mount_count;
                ext2fs_mark_super_dirty(fs);
                printf(_("Setting maximal mount count to %d\n"),
@@ -2893,20 +3398,21 @@ retry_open:
                                          ext2fs_blocks_count(sb) / 100.0);
                ext2fs_mark_super_dirty(fs);
                printf (_("Setting reserved blocks percentage to %g%% (%llu blocks)\n"),
-                       reserved_ratio, ext2fs_r_blocks_count(sb));
+                       reserved_ratio,
+                       (unsigned long long) ext2fs_r_blocks_count(sb));
        }
        if (r_flag) {
                if (reserved_blocks > ext2fs_blocks_count(sb)/2) {
                        com_err(program_name, 0,
                                _("reserved blocks count is too big (%llu)"),
-                               reserved_blocks);
+                               (unsigned long long) reserved_blocks);
                        rc = 1;
                        goto closefs;
                }
                ext2fs_r_blocks_count_set(sb, reserved_blocks);
                ext2fs_mark_super_dirty(fs);
                printf(_("Setting reserved blocks count to %llu\n"),
-                      reserved_blocks);
+                      (unsigned long long) reserved_blocks);
        }
        if (s_flag == 1) {
                if (ext2fs_has_feature_sparse_super(sb)) {
@@ -2949,13 +3455,13 @@ retry_open:
                        fputs(_("Warning: label too long, truncating.\n"),
                              stderr);
                memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
-               strncpy(sb->s_volume_name, new_label,
+               strncpy((char *)sb->s_volume_name, new_label,
                        sizeof(sb->s_volume_name));
                ext2fs_mark_super_dirty(fs);
        }
        if (M_flag) {
                memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
-               strncpy(sb->s_last_mounted, new_last_mounted,
+               strncpy((char *)sb->s_last_mounted, new_last_mounted,
                        sizeof(sb->s_last_mounted));
                ext2fs_mark_super_dirty(fs);
        }
@@ -2989,6 +3495,24 @@ retry_open:
                if (rc)
                        goto closefs;
        }
+       if (orphan_file_blocks) {
+               errcode_t err;
+
+               err = ext2fs_read_bitmaps(fs);
+               if (err) {
+                       com_err(program_name, err, "%s",
+                               _("while loading bitmaps"));
+                       rc = 1;
+                       goto closefs;
+               }
+               err = ext2fs_create_orphan_file(fs, orphan_file_blocks);
+               if (err) {
+                       com_err(program_name, err, "%s",
+                               _("while creating orphan file"));
+                       rc = 1;
+                       goto closefs;
+               }
+       }
 
        if (Q_flag) {
                if (mount_flags & EXT2_MF_MOUNTED) {
@@ -2997,7 +3521,9 @@ retry_open:
                        rc = 1;
                        goto closefs;
                }
-               handle_quota_options(fs);
+               rc = handle_quota_options(fs);
+               if (rc)
+                       goto closefs;
        }
 
        if (U_flag) {
@@ -3005,6 +3531,26 @@ retry_open:
                dgrp_t i;
                char buf[SUPERBLOCK_SIZE] __attribute__ ((aligned(8)));
                __u8 old_uuid[UUID_SIZE];
+               uuid_t new_uuid;
+               errcode_t ret = -1;
+
+               if (ext2fs_has_feature_stable_inodes(fs->super)) {
+                       fputs(_("Cannot change the UUID of this filesystem "
+                               "because it has the stable_inodes feature "
+                               "flag.\n"), stderr);
+                       exit(1);
+               }
+
+               if (!ext2fs_has_feature_csum_seed(fs->super) &&
+                   (ext2fs_has_feature_metadata_csum(fs->super) ||
+                    ext2fs_has_feature_ea_inode(fs->super))) {
+                       rc = check_fsck_needed(fs,
+                               _("Setting the UUID on this "
+                                 "filesystem could take some time."));
+                       if (rc)
+                               goto closefs;
+                       rewrite_checksums = REWRITE_ALL;
+               }
 
                if (ext2fs_has_group_desc_csum(fs)) {
                        /*
@@ -3024,12 +3570,9 @@ retry_open:
                                        "metadata_csum_seed' and re-run this "
                                        "command.\n"), stderr);
                                try_confirm_csum_seed_support();
-                               exit(1);
+                               rc = 1;
+                               goto closefs;
                        }
-                       if (!ext2fs_has_feature_csum_seed(fs->super))
-                               check_fsck_needed(fs,
-                                       _("Setting UUID on a checksummed "
-                                         "filesystem could take some time."));
 
                        /*
                         * Determine if the block group checksums are
@@ -3043,25 +3586,62 @@ retry_open:
                                set_csum = 1;
                }
 
-               memcpy(old_uuid, sb->s_uuid, UUID_SIZE);
-               if ((strcasecmp(new_UUID, "null") == 0) ||
-                   (strcasecmp(new_UUID, "clear") == 0)) {
-                       uuid_clear(sb->s_uuid);
-               } else if (strcasecmp(new_UUID, "time") == 0) {
-                       uuid_generate_time(sb->s_uuid);
-               } else if (strcasecmp(new_UUID, "random") == 0) {
-                       uuid_generate(sb->s_uuid);
-               } else if (uuid_parse(new_UUID, sb->s_uuid)) {
+#ifdef __linux__
+               if ((mount_flags & EXT2_MF_MOUNTED) &&
+                   !(mount_flags & EXT2_MF_READONLY) && mntpt[0]) {
+                       fd = open(mntpt, O_RDONLY);
+                       if (fd >= 0)
+                               fsuuid = malloc(sizeof(*fsuuid) + UUID_SIZE);
+                       if (fsuuid) {
+                               fsuuid->fsu_len = UUID_SIZE;
+                               fsuuid->fsu_flags = 0;
+                               ret = ioctl(fd, EXT4_IOC_GETFSUUID, fsuuid);
+                               if (ret || fsuuid->fsu_len != UUID_SIZE) {
+                                       free(fsuuid);
+                                       fsuuid = NULL;
+                               }
+                       }
+               }
+#endif
+
+               memcpy(old_uuid, fsuuid ? fsuuid->fsu_uuid : sb->s_uuid,
+                      UUID_SIZE);
+               if ((strcasecmp(requested_uuid, "null") == 0) ||
+                   (strcasecmp(requested_uuid, "clear") == 0)) {
+                       uuid_clear(new_uuid);
+               } else if (strcasecmp(requested_uuid, "time") == 0) {
+                       uuid_generate_time(new_uuid);
+               } else if (strcasecmp(requested_uuid, "random") == 0) {
+                       uuid_generate(new_uuid);
+               } else if (uuid_parse(requested_uuid, new_uuid)) {
                        com_err(program_name, 0, "%s",
                                _("Invalid UUID format\n"));
                        rc = 1;
                        goto closefs;
                }
-               ext2fs_init_csum_seed(fs);
-               if (set_csum) {
-                       for (i = 0; i < fs->group_desc_count; i++)
-                               ext2fs_group_desc_csum_set(fs, i);
-                       fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+
+               ret = -1;
+#ifdef __linux__
+               if (fsuuid) {
+                       fsuuid->fsu_len - UUID_SIZE;
+                       fsuuid->fsu_flags = 0;
+                       memcpy(&fsuuid->fsu_uuid, new_uuid, UUID_SIZE);
+                       ret = ioctl(fd, EXT4_IOC_SETFSUUID, fsuuid);
+               }
+#endif
+               /*
+                * If we can't set the UUID via the ioctl, fall
+                * back to directly modifying the superblock
+                .*/
+               if (ret) {
+                       memcpy(sb->s_uuid, new_uuid, UUID_SIZE);
+                       ext2fs_init_csum_seed(fs);
+                       if (set_csum) {
+                               for (i = 0; i < fs->group_desc_count; i++)
+                                       ext2fs_group_desc_csum_set(fs, i);
+                               fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+                       }
+                       ext2fs_mark_super_dirty(fs);
                }
 
                /* If this is a journal dev, we need to copy UUID into jsb */
@@ -3085,11 +3665,6 @@ retry_open:
                        if ((rc = fs_update_journal_user(sb, old_uuid)))
                                goto closefs;
                }
-
-               ext2fs_mark_super_dirty(fs);
-               if (ext2fs_has_feature_metadata_csum(fs->super) &&
-                   !ext2fs_has_feature_csum_seed(fs->super))
-                       rewrite_checksums = 1;
        }
 
        if (I_flag) {
@@ -3121,7 +3696,7 @@ retry_open:
                if (retval == 0) {
                        printf(_("Setting inode size %lu\n"),
                                                        new_inode_size);
-                       rewrite_checksums = 1;
+                       rewrite_checksums = REWRITE_ALL;
                } else {
                        printf("%s", _("Failed to change inode size\n"));
                        rc = 1;
@@ -3130,7 +3705,7 @@ retry_open:
        }
 
        if (rewrite_checksums)
-               rewrite_metadata_checksums(fs);
+               rewrite_metadata_checksums(fs, rewrite_checksums);
 
        if (l_flag)
                list_super(sb);
@@ -3154,39 +3729,14 @@ retry_open:
                free(ext_mount_opts);
        }
 
-#ifdef NO_RECOVERY
-       /* Warn if file system needs recovery and it is opened for writing. */
-       if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
-           (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
-           (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
-               fprintf(stderr,
-_("Warning: The journal is dirty. You may wish to replay the journal like:\n\n"
-  "\te2fsck -E journal_only %s\n\n"
-  "then rerun this command.  Otherwise, any changes made may be overwritten\n"
-  "by journal recovery.\n"), device_name);
-       }
-#else
-       /* Recover the journal if possible. */
-       if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
-           ext2fs_has_feature_journal_needs_recovery(fs->super)) {
-               errcode_t err;
-
-               printf(_("Recovering journal.\n"));
-               err = ext2fs_run_ext3_journal(&fs);
-               if (err) {
-                       com_err("tune2fs", err, "while recovering journal.\n");
-                       printf(_("Please run e2fsck -fy %s.\n"), argv[1]);
-                       goto closefs;
-               }
-               ext2fs_clear_feature_journal_needs_recovery(fs->super);
-               ext2fs_mark_super_dirty(fs);
-       }
-#endif
-
        free(device_name);
        remove_error_table(&et_ext2_error_table);
 
 closefs:
+       if (fd >= 0)
+               close(fd);
+       if (fsuuid)
+               free(fsuuid);
        if (rc) {
                ext2fs_mmp_stop(fs);
 #ifndef BUILD_AS_LIB
@@ -3194,6 +3744,7 @@ closefs:
 #endif
        }
 
-       convert_64bit(fs, feature_64bit);
+       if (feature_64bit)
+               convert_64bit(fs, feature_64bit);
        return (ext2fs_close_free(&fs) ? 1 : 0);
 }