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ext4: Add mount options in superblock
Allow mount options to be stored in the superblock. Also add default mount option bits for nobarrier, block_validity, discard, and nodelalloc. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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parent
ca0e05e4b1
commit
8b67f04ab9
2 changed files with 30 additions and 8 deletions
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@ -1025,8 +1025,9 @@ struct ext4_super_block {
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__le32 s_last_error_line; /* line number where error happened */
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__le64 s_last_error_block; /* block involved of last error */
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__u8 s_last_error_func[32]; /* function where the error happened */
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#define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_reserved)
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__le32 s_reserved[128]; /* Padding to the end of the block */
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#define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts)
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__u8 s_mount_opts[64];
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__le32 s_reserved[112]; /* Padding to the end of the block */
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};
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#define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START)
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@ -1341,6 +1342,10 @@ EXT4_INODE_BIT_FNS(state, state_flags)
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#define EXT4_DEFM_JMODE_DATA 0x0020
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#define EXT4_DEFM_JMODE_ORDERED 0x0040
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#define EXT4_DEFM_JMODE_WBACK 0x0060
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#define EXT4_DEFM_NOBARRIER 0x0100
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#define EXT4_DEFM_BLOCK_VALIDITY 0x0200
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#define EXT4_DEFM_DISCARD 0x0400
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#define EXT4_DEFM_NODELALLOC 0x0800
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/*
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* Default journal batch times
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@ -1003,10 +1003,10 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
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seq_puts(seq, ",journal_checksum");
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if (test_opt(sb, I_VERSION))
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seq_puts(seq, ",i_version");
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if (!test_opt(sb, DELALLOC))
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if (!test_opt(sb, DELALLOC) &&
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!(def_mount_opts & EXT4_DEFM_NODELALLOC))
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seq_puts(seq, ",nodelalloc");
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if (sbi->s_stripe)
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seq_printf(seq, ",stripe=%lu", sbi->s_stripe);
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/*
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@ -1030,7 +1030,7 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
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if (test_opt(sb, NO_AUTO_DA_ALLOC))
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seq_puts(seq, ",noauto_da_alloc");
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if (test_opt(sb, DISCARD))
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if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD))
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seq_puts(seq, ",discard");
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if (test_opt(sb, NOLOAD))
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@ -1039,6 +1039,10 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
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if (test_opt(sb, DIOREAD_NOLOCK))
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seq_puts(seq, ",dioread_nolock");
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if (test_opt(sb, BLOCK_VALIDITY) &&
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!(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY))
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seq_puts(seq, ",block_validity");
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ext4_show_quota_options(seq, sb);
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return 0;
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@ -2655,6 +2659,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
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set_opt(sbi->s_mount_opt, ERRORS_CONT);
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else
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set_opt(sbi->s_mount_opt, ERRORS_RO);
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if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)
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set_opt(sbi->s_mount_opt, BLOCK_VALIDITY);
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if (def_mount_opts & EXT4_DEFM_DISCARD)
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set_opt(sbi->s_mount_opt, DISCARD);
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sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
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sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
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@ -2662,15 +2670,23 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
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sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME;
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sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME;
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set_opt(sbi->s_mount_opt, BARRIER);
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if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0)
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set_opt(sbi->s_mount_opt, BARRIER);
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/*
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* enable delayed allocation by default
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* Use -o nodelalloc to turn it off
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*/
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if (!IS_EXT3_SB(sb))
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if (!IS_EXT3_SB(sb) &&
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((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0))
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set_opt(sbi->s_mount_opt, DELALLOC);
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if (!parse_options((char *) sbi->s_es->s_mount_opts, sb,
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&journal_devnum, &journal_ioprio, NULL, 0)) {
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ext4_msg(sb, KERN_WARNING,
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"failed to parse options in superblock: %s",
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sbi->s_es->s_mount_opts);
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}
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if (!parse_options((char *) data, sb, &journal_devnum,
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&journal_ioprio, NULL, 0))
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goto failed_mount;
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@ -3141,7 +3157,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
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descr = "out journal";
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ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
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"Opts: %s", descr, orig_data);
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"Opts: %s%s%s", descr, sbi->s_es->s_mount_opts,
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*sbi->s_es->s_mount_opts ? "; " : "", orig_data);
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init_timer(&sbi->s_err_report);
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sbi->s_err_report.function = print_daily_error_info;
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