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linux-next/fs/reiserfs/prints.c
Frederic Weisbecker 08f14fc896 kill-the-bkl/reiserfs: move the concurrent tree accesses checks per superblock 
When do_balance() balances the tree, a trick is performed to
provide the ability for other tree writers/readers to check whether
do_balance() is executing concurrently (requires CONFIG_REISERFS_CHECK).

This is done to protect concurrent accesses to the tree. The trick
is the following:

When do_balance is called, a unique global variable called cur_tb
takes a pointer to the current tree to be rebalanced.
Once do_balance finishes its work, cur_tb takes the NULL value.

Then, concurrent tree readers/writers just have to check the value
of cur_tb to ensure do_balance isn't executing concurrently.
If it is, then it proves that schedule() occured on do_balance(),
which then relaxed the bkl that protected the tree.

Now that the bkl has be turned into a mutex, this check is still
fine even though do_balance() becomes preemptible: the write lock
will not be automatically released on schedule(), so the tree is
still protected.

But this is only fine if we have a single reiserfs mountpoint.
Indeed, because the bkl is a global lock, it didn't allowed
concurrent executions between a tree reader/writer in a mount point
and a do_balance() on another tree from another mountpoint.

So assuming all these readers/writers weren't supposed to be
reentrant, the current check now sometimes detect false positives with
the current per-superblock mutex which allows this reentrancy.

This patch keeps the concurrent tree accesses check but moves it
per superblock, so that only trees from a same mount point are
checked to be not accessed concurrently.

[ Impact: fix spurious panic while running several reiserfs mount-points ]

Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2009-09-14 07:18:25 +02:00

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/*
* Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
*/
#include <linux/time.h>
#include <linux/fs.h>
#include <linux/reiserfs_fs.h>
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <stdarg.h>
static char error_buf[1024];
static char fmt_buf[1024];
static char off_buf[80];
static char *reiserfs_cpu_offset(struct cpu_key *key)
{
if (cpu_key_k_type(key) == TYPE_DIRENTRY)
sprintf(off_buf, "%Lu(%Lu)",
(unsigned long long)
GET_HASH_VALUE(cpu_key_k_offset(key)),
(unsigned long long)
GET_GENERATION_NUMBER(cpu_key_k_offset(key)));
else
sprintf(off_buf, "0x%Lx",
(unsigned long long)cpu_key_k_offset(key));
return off_buf;
}
static char *le_offset(struct reiserfs_key *key)
{
int version;
version = le_key_version(key);
if (le_key_k_type(version, key) == TYPE_DIRENTRY)
sprintf(off_buf, "%Lu(%Lu)",
(unsigned long long)
GET_HASH_VALUE(le_key_k_offset(version, key)),
(unsigned long long)
GET_GENERATION_NUMBER(le_key_k_offset(version, key)));
else
sprintf(off_buf, "0x%Lx",
(unsigned long long)le_key_k_offset(version, key));
return off_buf;
}
static char *cpu_type(struct cpu_key *key)
{
if (cpu_key_k_type(key) == TYPE_STAT_DATA)
return "SD";
if (cpu_key_k_type(key) == TYPE_DIRENTRY)
return "DIR";
if (cpu_key_k_type(key) == TYPE_DIRECT)
return "DIRECT";
if (cpu_key_k_type(key) == TYPE_INDIRECT)
return "IND";
return "UNKNOWN";
}
static char *le_type(struct reiserfs_key *key)
{
int version;
version = le_key_version(key);
if (le_key_k_type(version, key) == TYPE_STAT_DATA)
return "SD";
if (le_key_k_type(version, key) == TYPE_DIRENTRY)
return "DIR";
if (le_key_k_type(version, key) == TYPE_DIRECT)
return "DIRECT";
if (le_key_k_type(version, key) == TYPE_INDIRECT)
return "IND";
return "UNKNOWN";
}
/* %k */
static void sprintf_le_key(char *buf, struct reiserfs_key *key)
{
if (key)
sprintf(buf, "[%d %d %s %s]", le32_to_cpu(key->k_dir_id),
le32_to_cpu(key->k_objectid), le_offset(key),
le_type(key));
else
sprintf(buf, "[NULL]");
}
/* %K */
static void sprintf_cpu_key(char *buf, struct cpu_key *key)
{
if (key)
sprintf(buf, "[%d %d %s %s]", key->on_disk_key.k_dir_id,
key->on_disk_key.k_objectid, reiserfs_cpu_offset(key),
cpu_type(key));
else
sprintf(buf, "[NULL]");
}
static void sprintf_de_head(char *buf, struct reiserfs_de_head *deh)
{
if (deh)
sprintf(buf,
"[offset=%d dir_id=%d objectid=%d location=%d state=%04x]",
deh_offset(deh), deh_dir_id(deh), deh_objectid(deh),
deh_location(deh), deh_state(deh));
else
sprintf(buf, "[NULL]");
}
static void sprintf_item_head(char *buf, struct item_head *ih)
{
if (ih) {
strcpy(buf,
(ih_version(ih) == KEY_FORMAT_3_6) ? "*3.6* " : "*3.5*");
sprintf_le_key(buf + strlen(buf), &(ih->ih_key));
sprintf(buf + strlen(buf), ", item_len %d, item_location %d, "
"free_space(entry_count) %d",
ih_item_len(ih), ih_location(ih), ih_free_space(ih));
} else
sprintf(buf, "[NULL]");
}
static void sprintf_direntry(char *buf, struct reiserfs_dir_entry *de)
{
char name[20];
memcpy(name, de->de_name, de->de_namelen > 19 ? 19 : de->de_namelen);
name[de->de_namelen > 19 ? 19 : de->de_namelen] = 0;
sprintf(buf, "\"%s\"==>[%d %d]", name, de->de_dir_id, de->de_objectid);
}
static void sprintf_block_head(char *buf, struct buffer_head *bh)
{
sprintf(buf, "level=%d, nr_items=%d, free_space=%d rdkey ",
B_LEVEL(bh), B_NR_ITEMS(bh), B_FREE_SPACE(bh));
}
static void sprintf_buffer_head(char *buf, struct buffer_head *bh)
{
char b[BDEVNAME_SIZE];
sprintf(buf,
"dev %s, size %zd, blocknr %llu, count %d, state 0x%lx, page %p, (%s, %s, %s)",
bdevname(bh->b_bdev, b), bh->b_size,
(unsigned long long)bh->b_blocknr, atomic_read(&(bh->b_count)),
bh->b_state, bh->b_page,
buffer_uptodate(bh) ? "UPTODATE" : "!UPTODATE",
buffer_dirty(bh) ? "DIRTY" : "CLEAN",
buffer_locked(bh) ? "LOCKED" : "UNLOCKED");
}
static void sprintf_disk_child(char *buf, struct disk_child *dc)
{
sprintf(buf, "[dc_number=%d, dc_size=%u]", dc_block_number(dc),
dc_size(dc));
}
static char *is_there_reiserfs_struct(char *fmt, int *what)
{
char *k = fmt;
while ((k = strchr(k, '%')) != NULL) {
if (k[1] == 'k' || k[1] == 'K' || k[1] == 'h' || k[1] == 't' ||
k[1] == 'z' || k[1] == 'b' || k[1] == 'y' || k[1] == 'a') {
*what = k[1];
break;
}
k++;
}
return k;
}
/* debugging reiserfs we used to print out a lot of different
variables, like keys, item headers, buffer heads etc. Values of
most fields matter. So it took a long time just to write
appropriative printk. With this reiserfs_warning you can use format
specification for complex structures like you used to do with
printfs for integers, doubles and pointers. For instance, to print
out key structure you have to write just:
reiserfs_warning ("bad key %k", key);
instead of
printk ("bad key %lu %lu %lu %lu", key->k_dir_id, key->k_objectid,
key->k_offset, key->k_uniqueness);
*/
static DEFINE_SPINLOCK(error_lock);
static void prepare_error_buf(const char *fmt, va_list args)
{
char *fmt1 = fmt_buf;
char *k;
char *p = error_buf;
int what;
spin_lock(&error_lock);
strcpy(fmt1, fmt);
while ((k = is_there_reiserfs_struct(fmt1, &what)) != NULL) {
*k = 0;
p += vsprintf(p, fmt1, args);
switch (what) {
case 'k':
sprintf_le_key(p, va_arg(args, struct reiserfs_key *));
break;
case 'K':
sprintf_cpu_key(p, va_arg(args, struct cpu_key *));
break;
case 'h':
sprintf_item_head(p, va_arg(args, struct item_head *));
break;
case 't':
sprintf_direntry(p,
va_arg(args,
struct reiserfs_dir_entry *));
break;
case 'y':
sprintf_disk_child(p,
va_arg(args, struct disk_child *));
break;
case 'z':
sprintf_block_head(p,
va_arg(args, struct buffer_head *));
break;
case 'b':
sprintf_buffer_head(p,
va_arg(args, struct buffer_head *));
break;
case 'a':
sprintf_de_head(p,
va_arg(args,
struct reiserfs_de_head *));
break;
}
p += strlen(p);
fmt1 = k + 2;
}
vsprintf(p, fmt1, args);
spin_unlock(&error_lock);
}
/* in addition to usual conversion specifiers this accepts reiserfs
specific conversion specifiers:
%k to print little endian key,
%K to print cpu key,
%h to print item_head,
%t to print directory entry
%z to print block head (arg must be struct buffer_head *
%b to print buffer_head
*/
#define do_reiserfs_warning(fmt)\
{\
va_list args;\
va_start( args, fmt );\
prepare_error_buf( fmt, args );\
va_end( args );\
}
void __reiserfs_warning(struct super_block *sb, const char *id,
const char *function, const char *fmt, ...)
{
do_reiserfs_warning(fmt);
if (sb)
printk(KERN_WARNING "REISERFS warning (device %s): %s%s%s: "
"%s\n", sb->s_id, id ? id : "", id ? " " : "",
function, error_buf);
else
printk(KERN_WARNING "REISERFS warning: %s%s%s: %s\n",
id ? id : "", id ? " " : "", function, error_buf);
}
/* No newline.. reiserfs_info calls can be followed by printk's */
void reiserfs_info(struct super_block *sb, const char *fmt, ...)
{
do_reiserfs_warning(fmt);
if (sb)
printk(KERN_NOTICE "REISERFS (device %s): %s",
sb->s_id, error_buf);
else
printk(KERN_NOTICE "REISERFS %s:", error_buf);
}
/* No newline.. reiserfs_printk calls can be followed by printk's */
static void reiserfs_printk(const char *fmt, ...)
{
do_reiserfs_warning(fmt);
printk(error_buf);
}
void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...)
{
#ifdef CONFIG_REISERFS_CHECK
do_reiserfs_warning(fmt);
if (s)
printk(KERN_DEBUG "REISERFS debug (device %s): %s\n",
s->s_id, error_buf);
else
printk(KERN_DEBUG "REISERFS debug: %s\n", error_buf);
#endif
}
/* The format:
maintainer-errorid: [function-name:] message
where errorid is unique to the maintainer and function-name is
optional, is recommended, so that anyone can easily find the bug
with a simple grep for the short to type string
maintainer-errorid. Don't bother with reusing errorids, there are
lots of numbers out there.
Example:
reiserfs_panic(
p_sb, "reiser-29: reiserfs_new_blocknrs: "
"one of search_start or rn(%d) is equal to MAX_B_NUM,"
"which means that we are optimizing location based on the bogus location of a temp buffer (%p).",
rn, bh
);
Regular panic()s sometimes clear the screen before the message can
be read, thus the need for the while loop.
Numbering scheme for panic used by Vladimir and Anatoly( Hans completely ignores this scheme, and considers it
pointless complexity):
panics in reiserfs_fs.h have numbers from 1000 to 1999
super.c 2000 to 2999
preserve.c (unused) 3000 to 3999
bitmap.c 4000 to 4999
stree.c 5000 to 5999
prints.c 6000 to 6999
namei.c 7000 to 7999
fix_nodes.c 8000 to 8999
dir.c 9000 to 9999
lbalance.c 10000 to 10999
ibalance.c 11000 to 11999 not ready
do_balan.c 12000 to 12999
inode.c 13000 to 13999
file.c 14000 to 14999
objectid.c 15000 - 15999
buffer.c 16000 - 16999
symlink.c 17000 - 17999
. */
void __reiserfs_panic(struct super_block *sb, const char *id,
const char *function, const char *fmt, ...)
{
do_reiserfs_warning(fmt);
#ifdef CONFIG_REISERFS_CHECK
dump_stack();
#endif
if (sb)
panic(KERN_WARNING "REISERFS panic (device %s): %s%s%s: %s\n",
sb->s_id, id ? id : "", id ? " " : "",
function, error_buf);
else
panic(KERN_WARNING "REISERFS panic: %s%s%s: %s\n",
id ? id : "", id ? " " : "", function, error_buf);
}
void __reiserfs_error(struct super_block *sb, const char *id,
const char *function, const char *fmt, ...)
{
do_reiserfs_warning(fmt);
BUG_ON(sb == NULL);
if (reiserfs_error_panic(sb))
__reiserfs_panic(sb, id, function, error_buf);
if (id && id[0])
printk(KERN_CRIT "REISERFS error (device %s): %s %s: %s\n",
sb->s_id, id, function, error_buf);
else
printk(KERN_CRIT "REISERFS error (device %s): %s: %s\n",
sb->s_id, function, error_buf);
if (sb->s_flags & MS_RDONLY)
return;
reiserfs_info(sb, "Remounting filesystem read-only\n");
sb->s_flags |= MS_RDONLY;
reiserfs_abort_journal(sb, -EIO);
}
void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...)
{
do_reiserfs_warning(fmt);
if (reiserfs_error_panic(sb)) {
panic(KERN_CRIT "REISERFS panic (device %s): %s\n", sb->s_id,
error_buf);
}
if (reiserfs_is_journal_aborted(SB_JOURNAL(sb)))
return;
printk(KERN_CRIT "REISERFS abort (device %s): %s\n", sb->s_id,
error_buf);
sb->s_flags |= MS_RDONLY;
reiserfs_abort_journal(sb, errno);
}
/* this prints internal nodes (4 keys/items in line) (dc_number,
dc_size)[k_dirid, k_objectid, k_offset, k_uniqueness](dc_number,
dc_size)...*/
static int print_internal(struct buffer_head *bh, int first, int last)
{
struct reiserfs_key *key;
struct disk_child *dc;
int i;
int from, to;
if (!B_IS_KEYS_LEVEL(bh))
return 1;
check_internal(bh);
if (first == -1) {
from = 0;
to = B_NR_ITEMS(bh);
} else {
from = first;
to = last < B_NR_ITEMS(bh) ? last : B_NR_ITEMS(bh);
}
reiserfs_printk("INTERNAL NODE (%ld) contains %z\n", bh->b_blocknr, bh);
dc = B_N_CHILD(bh, from);
reiserfs_printk("PTR %d: %y ", from, dc);
for (i = from, key = B_N_PDELIM_KEY(bh, from), dc++; i < to;
i++, key++, dc++) {
reiserfs_printk("KEY %d: %k PTR %d: %y ", i, key, i + 1, dc);
if (i && i % 4 == 0)
printk("\n");
}
printk("\n");
return 0;
}
static int print_leaf(struct buffer_head *bh, int print_mode, int first,
int last)
{
struct block_head *blkh;
struct item_head *ih;
int i, nr;
int from, to;
if (!B_IS_ITEMS_LEVEL(bh))
return 1;
check_leaf(bh);
blkh = B_BLK_HEAD(bh);
ih = B_N_PITEM_HEAD(bh, 0);
nr = blkh_nr_item(blkh);
printk
("\n===================================================================\n");
reiserfs_printk("LEAF NODE (%ld) contains %z\n", bh->b_blocknr, bh);
if (!(print_mode & PRINT_LEAF_ITEMS)) {
reiserfs_printk("FIRST ITEM_KEY: %k, LAST ITEM KEY: %k\n",
&(ih->ih_key), &((ih + nr - 1)->ih_key));
return 0;
}
if (first < 0 || first > nr - 1)
from = 0;
else
from = first;
if (last < 0 || last > nr)
to = nr;
else
to = last;
ih += from;
printk
("-------------------------------------------------------------------------------\n");
printk
("|##| type | key | ilen | free_space | version | loc |\n");
for (i = from; i < to; i++, ih++) {
printk
("-------------------------------------------------------------------------------\n");
reiserfs_printk("|%2d| %h |\n", i, ih);
if (print_mode & PRINT_LEAF_ITEMS)
op_print_item(ih, B_I_PITEM(bh, ih));
}
printk
("===================================================================\n");
return 0;
}
char *reiserfs_hashname(int code)
{
if (code == YURA_HASH)
return "rupasov";
if (code == TEA_HASH)
return "tea";
if (code == R5_HASH)
return "r5";
return "unknown";
}
/* return 1 if this is not super block */
static int print_super_block(struct buffer_head *bh)
{
struct reiserfs_super_block *rs =
(struct reiserfs_super_block *)(bh->b_data);
int skipped, data_blocks;
char *version;
char b[BDEVNAME_SIZE];
if (is_reiserfs_3_5(rs)) {
version = "3.5";
} else if (is_reiserfs_3_6(rs)) {
version = "3.6";
} else if (is_reiserfs_jr(rs)) {
version = ((sb_version(rs) == REISERFS_VERSION_2) ?
"3.6" : "3.5");
} else {
return 1;
}
printk("%s\'s super block is in block %llu\n", bdevname(bh->b_bdev, b),
(unsigned long long)bh->b_blocknr);
printk("Reiserfs version %s\n", version);
printk("Block count %u\n", sb_block_count(rs));
printk("Blocksize %d\n", sb_blocksize(rs));
printk("Free blocks %u\n", sb_free_blocks(rs));
// FIXME: this would be confusing if
// someone stores reiserfs super block in some data block ;)
// skipped = (bh->b_blocknr * bh->b_size) / sb_blocksize(rs);
skipped = bh->b_blocknr;
data_blocks = sb_block_count(rs) - skipped - 1 - sb_bmap_nr(rs) -
(!is_reiserfs_jr(rs) ? sb_jp_journal_size(rs) +
1 : sb_reserved_for_journal(rs)) - sb_free_blocks(rs);
printk
("Busy blocks (skipped %d, bitmaps - %d, journal (or reserved) blocks - %d\n"
"1 super block, %d data blocks\n", skipped, sb_bmap_nr(rs),
(!is_reiserfs_jr(rs) ? (sb_jp_journal_size(rs) + 1) :
sb_reserved_for_journal(rs)), data_blocks);
printk("Root block %u\n", sb_root_block(rs));
printk("Journal block (first) %d\n", sb_jp_journal_1st_block(rs));
printk("Journal dev %d\n", sb_jp_journal_dev(rs));
printk("Journal orig size %d\n", sb_jp_journal_size(rs));
printk("FS state %d\n", sb_fs_state(rs));
printk("Hash function \"%s\"\n",
reiserfs_hashname(sb_hash_function_code(rs)));
printk("Tree height %d\n", sb_tree_height(rs));
return 0;
}
static int print_desc_block(struct buffer_head *bh)
{
struct reiserfs_journal_desc *desc;
if (memcmp(get_journal_desc_magic(bh), JOURNAL_DESC_MAGIC, 8))
return 1;
desc = (struct reiserfs_journal_desc *)(bh->b_data);
printk("Desc block %llu (j_trans_id %d, j_mount_id %d, j_len %d)",
(unsigned long long)bh->b_blocknr, get_desc_trans_id(desc),
get_desc_mount_id(desc), get_desc_trans_len(desc));
return 0;
}
void print_block(struct buffer_head *bh, ...) //int print_mode, int first, int last)
{
va_list args;
int mode, first, last;
va_start(args, bh);
if (!bh) {
printk("print_block: buffer is NULL\n");
return;
}
mode = va_arg(args, int);
first = va_arg(args, int);
last = va_arg(args, int);
if (print_leaf(bh, mode, first, last))
if (print_internal(bh, first, last))
if (print_super_block(bh))
if (print_desc_block(bh))
printk
("Block %llu contains unformatted data\n",
(unsigned long long)bh->b_blocknr);
va_end(args);
}
static char print_tb_buf[2048];
/* this stores initial state of tree balance in the print_tb_buf */
void store_print_tb(struct tree_balance *tb)
{
int h = 0;
int i;
struct buffer_head *tbSh, *tbFh;
if (!tb)
return;
sprintf(print_tb_buf, "\n"
"BALANCING %d\n"
"MODE=%c, ITEM_POS=%d POS_IN_ITEM=%d\n"
"=====================================================================\n"
"* h * S * L * R * F * FL * FR * CFL * CFR *\n",
REISERFS_SB(tb->tb_sb)->s_do_balance,
tb->tb_mode, PATH_LAST_POSITION(tb->tb_path),
tb->tb_path->pos_in_item);
for (h = 0; h < ARRAY_SIZE(tb->insert_size); h++) {
if (PATH_H_PATH_OFFSET(tb->tb_path, h) <=
tb->tb_path->path_length
&& PATH_H_PATH_OFFSET(tb->tb_path,
h) > ILLEGAL_PATH_ELEMENT_OFFSET) {
tbSh = PATH_H_PBUFFER(tb->tb_path, h);
tbFh = PATH_H_PPARENT(tb->tb_path, h);
} else {
tbSh = NULL;
tbFh = NULL;
}
sprintf(print_tb_buf + strlen(print_tb_buf),
"* %d * %3lld(%2d) * %3lld(%2d) * %3lld(%2d) * %5lld * %5lld * %5lld * %5lld * %5lld *\n",
h,
(tbSh) ? (long long)(tbSh->b_blocknr) : (-1LL),
(tbSh) ? atomic_read(&(tbSh->b_count)) : -1,
(tb->L[h]) ? (long long)(tb->L[h]->b_blocknr) : (-1LL),
(tb->L[h]) ? atomic_read(&(tb->L[h]->b_count)) : -1,
(tb->R[h]) ? (long long)(tb->R[h]->b_blocknr) : (-1LL),
(tb->R[h]) ? atomic_read(&(tb->R[h]->b_count)) : -1,
(tbFh) ? (long long)(tbFh->b_blocknr) : (-1LL),
(tb->FL[h]) ? (long long)(tb->FL[h]->
b_blocknr) : (-1LL),
(tb->FR[h]) ? (long long)(tb->FR[h]->
b_blocknr) : (-1LL),
(tb->CFL[h]) ? (long long)(tb->CFL[h]->
b_blocknr) : (-1LL),
(tb->CFR[h]) ? (long long)(tb->CFR[h]->
b_blocknr) : (-1LL));
}
sprintf(print_tb_buf + strlen(print_tb_buf),
"=====================================================================\n"
"* h * size * ln * lb * rn * rb * blkn * s0 * s1 * s1b * s2 * s2b * curb * lk * rk *\n"
"* 0 * %4d * %2d * %2d * %2d * %2d * %4d * %2d * %2d * %3d * %2d * %3d * %4d * %2d * %2d *\n",
tb->insert_size[0], tb->lnum[0], tb->lbytes, tb->rnum[0],
tb->rbytes, tb->blknum[0], tb->s0num, tb->s1num, tb->s1bytes,
tb->s2num, tb->s2bytes, tb->cur_blknum, tb->lkey[0],
tb->rkey[0]);
/* this prints balance parameters for non-leaf levels */
h = 0;
do {
h++;
sprintf(print_tb_buf + strlen(print_tb_buf),
"* %d * %4d * %2d * * %2d * * %2d *\n",
h, tb->insert_size[h], tb->lnum[h], tb->rnum[h],
tb->blknum[h]);
} while (tb->insert_size[h]);
sprintf(print_tb_buf + strlen(print_tb_buf),
"=====================================================================\n"
"FEB list: ");
/* print FEB list (list of buffers in form (bh (b_blocknr, b_count), that will be used for new nodes) */
h = 0;
for (i = 0; i < ARRAY_SIZE(tb->FEB); i++)
sprintf(print_tb_buf + strlen(print_tb_buf),
"%p (%llu %d)%s", tb->FEB[i],
tb->FEB[i] ? (unsigned long long)tb->FEB[i]->
b_blocknr : 0ULL,
tb->FEB[i] ? atomic_read(&(tb->FEB[i]->b_count)) : 0,
(i == ARRAY_SIZE(tb->FEB) - 1) ? "\n" : ", ");
sprintf(print_tb_buf + strlen(print_tb_buf),
"======================== the end ====================================\n");
}
void print_cur_tb(char *mes)
{
printk("%s\n%s", mes, print_tb_buf);
}
static void check_leaf_block_head(struct buffer_head *bh)
{
struct block_head *blkh;
int nr;
blkh = B_BLK_HEAD(bh);
nr = blkh_nr_item(blkh);
if (nr > (bh->b_size - BLKH_SIZE) / IH_SIZE)
reiserfs_panic(NULL, "vs-6010", "invalid item number %z",
bh);
if (blkh_free_space(blkh) > bh->b_size - BLKH_SIZE - IH_SIZE * nr)
reiserfs_panic(NULL, "vs-6020", "invalid free space %z",
bh);
}
static void check_internal_block_head(struct buffer_head *bh)
{
struct block_head *blkh;
blkh = B_BLK_HEAD(bh);
if (!(B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL && B_LEVEL(bh) <= MAX_HEIGHT))
reiserfs_panic(NULL, "vs-6025", "invalid level %z", bh);
if (B_NR_ITEMS(bh) > (bh->b_size - BLKH_SIZE) / IH_SIZE)
reiserfs_panic(NULL, "vs-6030", "invalid item number %z", bh);
if (B_FREE_SPACE(bh) !=
bh->b_size - BLKH_SIZE - KEY_SIZE * B_NR_ITEMS(bh) -
DC_SIZE * (B_NR_ITEMS(bh) + 1))
reiserfs_panic(NULL, "vs-6040", "invalid free space %z", bh);
}
void check_leaf(struct buffer_head *bh)
{
int i;
struct item_head *ih;
if (!bh)
return;
check_leaf_block_head(bh);
for (i = 0, ih = B_N_PITEM_HEAD(bh, 0); i < B_NR_ITEMS(bh); i++, ih++)
op_check_item(ih, B_I_PITEM(bh, ih));
}
void check_internal(struct buffer_head *bh)
{
if (!bh)
return;
check_internal_block_head(bh);
}
void print_statistics(struct super_block *s)
{
/*
printk ("reiserfs_put_super: session statistics: balances %d, fix_nodes %d, \
bmap with search %d, without %d, dir2ind %d, ind2dir %d\n",
REISERFS_SB(s)->s_do_balance, REISERFS_SB(s)->s_fix_nodes,
REISERFS_SB(s)->s_bmaps, REISERFS_SB(s)->s_bmaps_without_search,
REISERFS_SB(s)->s_direct2indirect, REISERFS_SB(s)->s_indirect2direct);
*/
}
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