static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
unsigned long journal_devnum);
-static int ext4_commit_super(struct super_block *sb,
- struct ext4_super_block *es, int sync);
+static int ext4_commit_super(struct super_block *sb, int sync);
static void ext4_mark_recovery_complete(struct super_block *sb,
struct ext4_super_block *es);
static void ext4_clear_journal_err(struct super_block *sb,
printk(KERN_CRIT "Remounting filesystem read-only\n");
sb->s_flags |= MS_RDONLY;
}
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
if (test_opt(sb, ERRORS_PANIC))
panic("EXT4-fs (device %s): panic forced after error\n",
sb->s_id);
if (test_opt(sb, ERRORS_CONT)) {
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- ext4_commit_super(sb, es, 0);
+ ext4_commit_super(sb, 0);
return;
}
ext4_unlock_group(sb, grp);
if (!(sb->s_flags & MS_RDONLY)) {
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
es->s_state = cpu_to_le16(sbi->s_mount_state);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
}
if (sbi->s_proc) {
remove_proc_entry(sb->s_id, ext4_proc_root);
.dirty_inode = ext4_dirty_inode,
.delete_inode = ext4_delete_inode,
.put_super = ext4_put_super,
- .write_super = ext4_write_super,
.sync_fs = ext4_sync_fs,
.freeze_fs = ext4_freeze,
.unfreeze_fs = ext4_unfreeze,
.bdev_try_to_free_page = bdev_try_to_free_page,
};
+static const struct super_operations ext4_nojournal_sops = {
+ .alloc_inode = ext4_alloc_inode,
+ .destroy_inode = ext4_destroy_inode,
+ .write_inode = ext4_write_inode,
+ .dirty_inode = ext4_dirty_inode,
+ .delete_inode = ext4_delete_inode,
+ .write_super = ext4_write_super,
+ .put_super = ext4_put_super,
+ .statfs = ext4_statfs,
+ .remount_fs = ext4_remount,
+ .clear_inode = ext4_clear_inode,
+ .show_options = ext4_show_options,
+#ifdef CONFIG_QUOTA
+ .quota_read = ext4_quota_read,
+ .quota_write = ext4_quota_write,
+#endif
+ .bdev_try_to_free_page = bdev_try_to_free_page,
+};
+
static const struct export_operations ext4_export_ops = {
.fh_to_dentry = ext4_fh_to_dentry,
.fh_to_parent = ext4_fh_to_parent,
return 0;
if (option < 0 || option > (1 << 30))
return 0;
- if (option & (option - 1)) {
+ if (!is_power_of_2(option)) {
printk(KERN_ERR "EXT4-fs: inode_readahead_blks"
" must be a power of 2\n");
return 0;
if (sbi->s_journal)
EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
if (test_opt(sb, DEBUG))
printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, "
"bpg=%lu, ipg=%lu, mo=%04lx]\n",
if (parse_strtoul(buf, 0x40000000, &t))
return -EINVAL;
- /* inode_readahead_blks must be a power of 2 */
- if (t & (t-1))
+ if (!is_power_of_2(t))
return -EINVAL;
sbi->s_inode_readahead_blks = t;
/*
* set up enough so that it can read an inode
*/
- sb->s_op = &ext4_sops;
+ if (!test_opt(sb, NOLOAD) &&
+ EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
+ sb->s_op = &ext4_sops;
+ else
+ sb->s_op = &ext4_nojournal_sops;
sb->s_export_op = &ext4_export_ops;
sb->s_xattr = ext4_xattr_handlers;
#ifdef CONFIG_QUOTA
if (test_opt(sb, ERRORS_PANIC)) {
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
goto failed_mount4;
}
}
if (journal_devnum &&
journal_devnum != le32_to_cpu(es->s_journal_dev)) {
es->s_journal_dev = cpu_to_le32(journal_devnum);
- sb->s_dirt = 1;
/* Make sure we flush the recovery flag to disk. */
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
}
return 0;
}
-static int ext4_commit_super(struct super_block *sb,
- struct ext4_super_block *es, int sync)
+static int ext4_commit_super(struct super_block *sb, int sync)
{
+ struct ext4_super_block *es = EXT4_SB(sb)->s_es;
struct buffer_head *sbh = EXT4_SB(sb)->s_sbh;
int error = 0;
&EXT4_SB(sb)->s_freeblocks_counter));
es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive(
&EXT4_SB(sb)->s_freeinodes_counter));
-
+ sb->s_dirt = 0;
BUFFER_TRACE(sbh, "marking dirty");
mark_buffer_dirty(sbh);
if (sync) {
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) &&
sb->s_flags & MS_RDONLY) {
EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- sb->s_dirt = 0;
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
}
unlock_super(sb);
EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS;
es->s_state |= cpu_to_le16(EXT4_ERROR_FS);
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
jbd2_journal_clear_err(journal);
}
return 0;
journal = EXT4_SB(sb)->s_journal;
- if (journal) {
- sb->s_dirt = 0;
+ if (journal)
ret = ext4_journal_force_commit(journal);
- }
return ret;
}
-/*
- * Ext4 always journals updates to the superblock itself, so we don't
- * have to propagate any other updates to the superblock on disk at this
- * point. (We can probably nuke this function altogether, and remove
- * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...)
- */
static void ext4_write_super(struct super_block *sb)
{
- if (EXT4_SB(sb)->s_journal) {
- if (mutex_trylock(&sb->s_lock) != 0)
- BUG();
- sb->s_dirt = 0;
- } else {
- ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
- }
+ ext4_commit_super(sb, 1);
}
static int ext4_sync_fs(struct super_block *sb, int wait)
tid_t target;
trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait);
- sb->s_dirt = 0;
- if (EXT4_SB(sb)->s_journal) {
- if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal,
- &target)) {
- if (wait)
- jbd2_log_wait_commit(EXT4_SB(sb)->s_journal,
- target);
- }
- } else {
- ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait);
+ if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) {
+ if (wait)
+ jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target);
}
return ret;
}
{
int error = 0;
journal_t *journal;
- sb->s_dirt = 0;
- if (!(sb->s_flags & MS_RDONLY)) {
- journal = EXT4_SB(sb)->s_journal;
+ if (sb->s_flags & MS_RDONLY)
+ return 0;
- if (journal) {
- /* Now we set up the journal barrier. */
- jbd2_journal_lock_updates(journal);
+ journal = EXT4_SB(sb)->s_journal;
- /*
- * We don't want to clear needs_recovery flag when we
- * failed to flush the journal.
- */
- error = jbd2_journal_flush(journal);
- if (error < 0)
- goto out;
- }
+ /* Now we set up the journal barrier. */
+ jbd2_journal_lock_updates(journal);
- /* Journal blocked and flushed, clear needs_recovery flag. */
- EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
- if (error)
- goto out;
+ /*
+ * Don't clear the needs_recovery flag if we failed to flush
+ * the journal.
+ */
+ error = jbd2_journal_flush(journal);
+ if (error < 0) {
+ out:
+ jbd2_journal_unlock_updates(journal);
+ return error;
}
+
+ /* Journal blocked and flushed, clear needs_recovery flag. */
+ EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
+ error = ext4_commit_super(sb, 1);
+ if (error)
+ goto out;
return 0;
-out:
- jbd2_journal_unlock_updates(journal);
- return error;
}
/*
*/
static int ext4_unfreeze(struct super_block *sb)
{
- if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) {
- lock_super(sb);
- /* Reser the needs_recovery flag before the fs is unlocked. */
- EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1);
- unlock_super(sb);
- jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
- }
+ if (sb->s_flags & MS_RDONLY)
+ return 0;
+
+ lock_super(sb);
+ /* Reset the needs_recovery flag before the fs is unlocked. */
+ EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
+ ext4_commit_super(sb, 1);
+ unlock_super(sb);
+ jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
return 0;
}
}
}
if (sbi->s_journal == NULL)
- ext4_commit_super(sb, es, 1);
+ ext4_commit_super(sb, 1);
#ifdef CONFIG_QUOTA
/* Release old quota file names */
if (test_opt(sb, MINIX_DF)) {
sbi->s_overhead_last = 0;
} else if (sbi->s_blocks_last != ext4_blocks_count(es)) {
- ext4_group_t ngroups = sbi->s_groups_count, i;
+ ext4_group_t i, ngroups = ext4_get_groups_count(sb);
ext4_fsblk_t overhead = 0;
- smp_rmb();
/*
* Compute the overhead (FS structures). This is constant
projects / mirror_ubuntu-bionic-kernel.git / blobdiff