//
// a portion of this function, particularly the VFS interface portion,
// was derived from minix or ext2's analog and evolved as the
// prototype did. You should be able to tell which portion by looking
// at the ext2 code and comparing. It's subfunctions contain no code
// used as a template unless they are so labeled.
//
static struct super_block * reiserfs_read_super (struct super_block * s, void * data, int silent)
{
int size;
struct inode *root_inode;
kdev_t dev = s->s_dev;
int j;
extern int *blksize_size[];
struct reiserfs_transaction_handle th ;
int old_format = 0;
unsigned long blocks;
int jinit_done = 0 ;
struct reiserfs_iget4_args args ;
int old_magic;
struct reiserfs_super_block * rs;
memset (&s->u.reiserfs_sb, 0, sizeof (struct reiserfs_sb_info));
if (parse_options ((char *) data, &(s->u.reiserfs_sb.s_mount_opt), &blocks) == 0) {
return NULL;
}
if (blocks) {
printk("reserfs: resize option for remount only\n");
return NULL;
}
if (blksize_size[MAJOR(dev)] && blksize_size[MAJOR(dev)][MINOR(dev)] != 0) {
/* as blocksize is set for partition we use it */
size = blksize_size[MAJOR(dev)][MINOR(dev)];
} else {
size = BLOCK_SIZE;
set_blocksize (s->s_dev, BLOCK_SIZE);
}
/* read block (64-th 1k block), which can contain reiserfs super block */
if (read_super_block (s, size, REISERFS_DISK_OFFSET_IN_BYTES)) {
// try old format (undistributed bitmap, super block in 8-th 1k block of a device)
if (read_super_block (s, size, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
goto error;
else
old_format = 1;
}
rs = SB_DISK_SUPER_BLOCK (s);
s->u.reiserfs_sb.s_mount_state = SB_REISERFS_STATE(s);
s->u.reiserfs_sb.s_mount_state = REISERFS_VALID_FS ;
if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
printk ("reiserfs_read_super: unable to read bitmap\n");
goto error;
}
#ifdef CONFIG_REISERFS_CHECK
printk("reiserfs:warning: CONFIG_REISERFS_CHECK is set ON\n");
printk("reiserfs:warning: - it is slow mode for debugging.\n");
#endif
// set_device_ro(s->s_dev, 1) ;
if (journal_init(s)) {
printk("reiserfs_read_super: unable to initialize journal space\n") ;
goto error ;
} else {
jinit_done = 1 ; /* once this is set, journal_release must be called
** if we error out of the mount
*/
}
if (reread_meta_blocks(s)) {
printk("reiserfs_read_super: unable to reread meta blocks after journal init\n") ;
goto error ;
}
if (replay_only (s))
goto error;
if (is_read_only(s->s_dev) && !(s->s_flags & MS_RDONLY)) {
printk("clm-7000: Detected readonly device, marking FS readonly\n") ;
s->s_flags |= MS_RDONLY ;
}
args.objectid = REISERFS_ROOT_PARENT_OBJECTID ;
root_inode = iget4 (s, REISERFS_ROOT_OBJECTID, 0, (void *)(&args));
if (!root_inode) {
printk ("reiserfs_read_super: get root inode failed\n");
goto error;
}
s->s_root = d_alloc_root(root_inode);
if (!s->s_root) {
iput(root_inode);
goto error;
}
// define and initialize hash function
s->u.reiserfs_sb.s_hash_function = hash_function (s);
if (s->u.reiserfs_sb.s_hash_function == NULL) {
dput(s->s_root) ;
s->s_root = NULL ;
goto error ;
}
rs = SB_DISK_SUPER_BLOCK (s);
old_magic = strncmp (rs->s_magic, REISER2FS_SUPER_MAGIC_STRING,
strlen ( REISER2FS_SUPER_MAGIC_STRING));
if (!old_magic)
set_bit(REISERFS_3_6, &(s->u.reiserfs_sb.s_properties));
else
set_bit(REISERFS_3_5, &(s->u.reiserfs_sb.s_properties));
if (!(s->s_flags & MS_RDONLY)) {
journal_begin(&th, s, 1) ;
reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
set_sb_state( rs, REISERFS_ERROR_FS );
if ( old_magic ) {
// filesystem created under 3.5.x found
if (convert_reiserfs (s)) {
reiserfs_warning("reiserfs: converting 3.5.x filesystem to the new format\n") ;
// after this 3.5.x will not be able to mount this partition
memcpy (rs->s_magic, REISER2FS_SUPER_MAGIC_STRING,
sizeof (REISER2FS_SUPER_MAGIC_STRING));
reiserfs_convert_objectid_map_v1(s) ;
set_bit(REISERFS_3_6, &(s->u.reiserfs_sb.s_properties));
clear_bit(REISERFS_3_5, &(s->u.reiserfs_sb.s_properties));
} else {
reiserfs_warning("reiserfs: using 3.5.x disk format\n") ;
}
}
journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
journal_end(&th, s, 1) ;
/* look for files which were to be removed in previous session */
finish_unfinished (s);
s->s_dirt = 0;
} else {
if ( old_magic ) {
reiserfs_warning("reiserfs: using 3.5.x disk format\n") ;
}
}
// mark hash in super block: it could be unset. overwrite should be ok
set_sb_hash_function_code( rs, function2code(s->u.reiserfs_sb.s_hash_function ) );
handle_attrs( s );
reiserfs_proc_info_init( s );
reiserfs_proc_register( s, "version", reiserfs_version_in_proc );
reiserfs_proc_register( s, "super", reiserfs_super_in_proc );
reiserfs_proc_register( s, "per-level", reiserfs_per_level_in_proc );
reiserfs_proc_register( s, "bitmap", reiserfs_bitmap_in_proc );
reiserfs_proc_register( s, "on-disk-super", reiserfs_on_disk_super_in_proc );
reiserfs_proc_register( s, "oidmap", reiserfs_oidmap_in_proc );
reiserfs_proc_register( s, "journal", reiserfs_journal_in_proc );
init_waitqueue_head (&(s->u.reiserfs_sb.s_wait));
printk("%s\n", reiserfs_get_version_string()) ;
return s;
error:
if (jinit_done) { /* kill the commit thread, free journal ram */
journal_release_error(NULL, s) ;
}
if (SB_DISK_SUPER_BLOCK (s)) {
for (j = 0; j < SB_BMAP_NR (s); j ++) {
if (SB_AP_BITMAP (s))
brelse (SB_AP_BITMAP (s)[j]);
}
if (SB_AP_BITMAP (s))
reiserfs_kfree (SB_AP_BITMAP (s), sizeof (struct buffer_head *) * SB_BMAP_NR (s), s);
}
if (SB_BUFFER_WITH_SB (s))
brelse(SB_BUFFER_WITH_SB (s));
return NULL;
}
int reiserfs_super_in_proc( char *buffer, char **start, off_t offset,
int count, int *eof, void *data )
{
struct super_block *sb;
struct reiserfs_sb_info *r;
int len = 0;
sb = procinfo_prologue( ( kdev_t ) ( long ) data );
if( sb == NULL )
return -ENOENT;
r = &sb->u.reiserfs_sb;
len += sprintf( &buffer[ len ],
"state: \t%s\n"
"mount options: \t%s%s%s%s%s%s%s%s%s%s%s%s\n"
"gen. counter: \t%i\n"
"s_kmallocs: \t%i\n"
"s_disk_reads: \t%i\n"
"s_disk_writes: \t%i\n"
"s_fix_nodes: \t%i\n"
"s_do_balance: \t%i\n"
"s_unneeded_left_neighbor: \t%i\n"
"s_good_search_by_key_reada: \t%i\n"
"s_bmaps: \t%i\n"
"s_bmaps_without_search: \t%i\n"
"s_direct2indirect: \t%i\n"
"s_indirect2direct: \t%i\n"
"\n"
"max_hash_collisions: \t%i\n"
"breads: \t%lu\n"
"bread_misses: \t%lu\n"
"search_by_key: \t%lu\n"
"search_by_key_fs_changed: \t%lu\n"
"search_by_key_restarted: \t%lu\n"
"insert_item_restarted: \t%lu\n"
"paste_into_item_restarted: \t%lu\n"
"cut_from_item_restarted: \t%lu\n"
"delete_solid_item_restarted: \t%lu\n"
"delete_item_restarted: \t%lu\n"
"leaked_oid: \t%lu\n"
"leaves_removable: \t%lu\n",
SF( s_mount_state ) == REISERFS_VALID_FS ?
"REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
reiserfs_r5_hash( sb ) ? "FORCE_R5 " : "",
reiserfs_rupasov_hash( sb ) ? "FORCE_RUPASOV " : "",
reiserfs_tea_hash( sb ) ? "FORCE_TEA " : "",
reiserfs_hash_detect( sb ) ? "DETECT_HASH " : "",
reiserfs_no_border( sb ) ? "NO_BORDER " : "BORDER ",
reiserfs_no_unhashed_relocation( sb ) ? "NO_UNHASHED_RELOCATION " : "",
reiserfs_hashed_relocation( sb ) ? "UNHASHED_RELOCATION " : "",
reiserfs_test4( sb ) ? "TEST4 " : "",
have_large_tails( sb ) ? "TAILS " : have_small_tails(sb)?"SMALL_TAILS ":"NO_TAILS ",
replay_only( sb ) ? "REPLAY_ONLY " : "",
reiserfs_dont_log( sb ) ? "DONT_LOG " : "LOG ",
convert_reiserfs( sb ) ? "CONV " : "",
atomic_read( &r -> s_generation_counter ),
SF( s_kmallocs ),
SF( s_disk_reads ),
SF( s_disk_writes ),
SF( s_fix_nodes ),
SF( s_do_balance ),
SF( s_unneeded_left_neighbor ),
SF( s_good_search_by_key_reada ),
SF( s_bmaps ),
SF( s_bmaps_without_search ),
SF( s_direct2indirect ),
SF( s_indirect2direct ),
SFP( max_hash_collisions ),
SFP( breads ),
SFP( bread_miss ),
SFP( search_by_key ),
SFP( search_by_key_fs_changed ),
SFP( search_by_key_restarted ),
SFP( insert_item_restarted ),
SFP( paste_into_item_restarted ),
SFP( cut_from_item_restarted ),
SFP( delete_solid_item_restarted ),
SFP( delete_item_restarted ),
SFP( leaked_oid ),
SFP( leaves_removable ) );
procinfo_epilogue( sb );
return reiserfs_proc_tail( len, buffer, start, offset, count, eof );
}
static int show_super(struct seq_file *m, void *unused)
{
struct super_block *sb = m->private;
struct reiserfs_sb_info *r = REISERFS_SB(sb);
seq_printf(m, "state: \t%s\n"
"mount options: \t%s%s%s%s%s%s%s%s%s%s%s\n"
"gen. counter: \t%i\n"
"s_disk_reads: \t%i\n"
"s_disk_writes: \t%i\n"
"s_fix_nodes: \t%i\n"
"s_do_balance: \t%i\n"
"s_unneeded_left_neighbor: \t%i\n"
"s_good_search_by_key_reada: \t%i\n"
"s_bmaps: \t%i\n"
"s_bmaps_without_search: \t%i\n"
"s_direct2indirect: \t%i\n"
"s_indirect2direct: \t%i\n"
"\n"
"max_hash_collisions: \t%i\n"
"breads: \t%lu\n"
"bread_misses: \t%lu\n"
"search_by_key: \t%lu\n"
"search_by_key_fs_changed: \t%lu\n"
"search_by_key_restarted: \t%lu\n"
"insert_item_restarted: \t%lu\n"
"paste_into_item_restarted: \t%lu\n"
"cut_from_item_restarted: \t%lu\n"
"delete_solid_item_restarted: \t%lu\n"
"delete_item_restarted: \t%lu\n"
"leaked_oid: \t%lu\n"
"leaves_removable: \t%lu\n",
SF(s_mount_state) == REISERFS_VALID_FS ?
"REISERFS_VALID_FS" : "REISERFS_ERROR_FS",
reiserfs_r5_hash(sb) ? "FORCE_R5 " : "",
reiserfs_rupasov_hash(sb) ? "FORCE_RUPASOV " : "",
reiserfs_tea_hash(sb) ? "FORCE_TEA " : "",
reiserfs_hash_detect(sb) ? "DETECT_HASH " : "",
reiserfs_no_border(sb) ? "NO_BORDER " : "BORDER ",
reiserfs_no_unhashed_relocation(sb) ?
"NO_UNHASHED_RELOCATION " : "",
reiserfs_hashed_relocation(sb) ? "UNHASHED_RELOCATION " : "",
reiserfs_test4(sb) ? "TEST4 " : "",
have_large_tails(sb) ? "TAILS " : have_small_tails(sb) ?
"SMALL_TAILS " : "NO_TAILS ",
replay_only(sb) ? "REPLAY_ONLY " : "",
convert_reiserfs(sb) ? "CONV " : "",
atomic_read(&r->s_generation_counter),
SF(s_disk_reads), SF(s_disk_writes), SF(s_fix_nodes),
SF(s_do_balance), SF(s_unneeded_left_neighbor),
SF(s_good_search_by_key_reada), SF(s_bmaps),
SF(s_bmaps_without_search), SF(s_direct2indirect),
SF(s_indirect2direct), SFP(max_hash_collisions), SFP(breads),
SFP(bread_miss), SFP(search_by_key),
SFP(search_by_key_fs_changed), SFP(search_by_key_restarted),
SFP(insert_item_restarted), SFP(paste_into_item_restarted),
SFP(cut_from_item_restarted),
SFP(delete_solid_item_restarted), SFP(delete_item_restarted),
SFP(leaked_oid), SFP(leaves_removable));
return 0;
}