UBIFS: fix key printing

Before commit 56e46742e846e4de167dde0e1e1071ace1c882a5 we have had locking
around all printing macros and we could use static buffers for creating
key strings and printing them. However, now we do not have that locking and
we cannot use static buffers. This commit removes the old DBGKEY() macros
and introduces few new helper macros for printing debugging messages plus
a key at the end. Thankfully, all the messages are already structures in
a way that the key is printed in the end.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

6 files changed, 91 insertions, 88 deletions

diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 6ae9fdcd2020..f922cbacdb96 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -38,9 +38,6 @@
 
 DEFINE_SPINLOCK(dbg_lock);
 
-static char dbg_key_buf0[128];
-static char dbg_key_buf1[128];
-
 static const char *get_key_fmt(int fmt)
 {
         switch (fmt) {
@@ -103,8 +100,8 @@ static const char *get_dent_type(int type)
         }
 }
 
-static void snprintf_key(const struct ubifs_info *c, const union ubifs_key *key,
-                         char *buffer, int len)
+const char *dbg_snprintf_key(const struct ubifs_info *c,
+                             const union ubifs_key *key, char *buffer, int len)
 {
         char *p = buffer;
         int type = key_type(c, key);
@@ -139,20 +136,7 @@ static void snprintf_key(const struct ubifs_info *c, const union ubifs_key *key,
         } else
                 len -= snprintf(p, len, "bad key format %d", c->key_fmt);
         ubifs_assert(len > 0);
-}
-
-const char *dbg_key_str0(const struct ubifs_info *c, const union ubifs_key *key)
-{
-        /* dbg_lock must be held */
-        snprintf_key(c, key, dbg_key_buf0, sizeof(dbg_key_buf0) - 1);
-        return dbg_key_buf0;
-}
-
-const char *dbg_key_str1(const struct ubifs_info *c, const union ubifs_key *key)
-{
-        /* dbg_lock must be held */
-        snprintf_key(c, key, dbg_key_buf1, sizeof(dbg_key_buf1) - 1);
-        return dbg_key_buf1;
+        return p;
 }
 
 const char *dbg_ntype(int type)
@@ -321,6 +305,7 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
         int i, n;
         union ubifs_key key;
         const struct ubifs_ch *ch = node;
+        char key_buf[DBG_KEY_BUF_LEN];
 
         if (dbg_is_tst_rcvry(c))
                 return;
@@ -476,7 +461,8 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
                 const struct ubifs_ino_node *ino = node;
 
                 key_read(c, &ino->key, &key);
-                printk(KERN_DEBUG "\tkey            %s\n", DBGKEY(&key));
+                printk(KERN_DEBUG "\tkey            %s\n",
+                       dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN));
                 printk(KERN_DEBUG "\tcreat_sqnum    %llu\n",
                        (unsigned long long)le64_to_cpu(ino->creat_sqnum));
                 printk(KERN_DEBUG "\tsize           %llu\n",
@@ -519,7 +505,8 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
                 int nlen = le16_to_cpu(dent->nlen);
 
                 key_read(c, &dent->key, &key);
-                printk(KERN_DEBUG "\tkey            %s\n", DBGKEY(&key));
+                printk(KERN_DEBUG "\tkey            %s\n",
+                       dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN));
                 printk(KERN_DEBUG "\tinum           %llu\n",
                        (unsigned long long)le64_to_cpu(dent->inum));
                 printk(KERN_DEBUG "\ttype           %d\n", (int)dent->type);
@@ -543,7 +530,8 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
                 int dlen = le32_to_cpu(ch->len) - UBIFS_DATA_NODE_SZ;
 
                 key_read(c, &dn->key, &key);
-                printk(KERN_DEBUG "\tkey            %s\n", DBGKEY(&key));
+                printk(KERN_DEBUG "\tkey            %s\n",
+                       dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN));
                 printk(KERN_DEBUG "\tsize           %u\n",
                        le32_to_cpu(dn->size));
                 printk(KERN_DEBUG "\tcompr_typ      %d\n",
@@ -584,7 +572,9 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
                         key_read(c, &br->key, &key);
                         printk(KERN_DEBUG "\t%d: LEB %d:%d len %d key %s\n",
                                i, le32_to_cpu(br->lnum), le32_to_cpu(br->offs),
-                               le32_to_cpu(br->len), DBGKEY(&key));
+                               le32_to_cpu(br->len),
+                               dbg_snprintf_key(c, &key, key_buf,
+                                                DBG_KEY_BUF_LEN));
                 }
                 break;
         }
@@ -936,6 +926,7 @@ void dbg_dump_znode(const struct ubifs_info *c,
 {
         int n;
         const struct ubifs_zbranch *zbr;
+        char key_buf[DBG_KEY_BUF_LEN];
 
         spin_lock(&dbg_lock);
         if (znode->parent)
@@ -960,12 +951,16 @@ void dbg_dump_znode(const struct ubifs_info *c,
                         printk(KERN_DEBUG "\t%d: znode %p LEB %d:%d len %d key "
                                           "%s\n", n, zbr->znode, zbr->lnum,
                                           zbr->offs, zbr->len,
-                                          DBGKEY(&zbr->key));
+                                          dbg_snprintf_key(c, &zbr->key,
+                                                           key_buf,
+                                                           DBG_KEY_BUF_LEN));
                 else
                         printk(KERN_DEBUG "\t%d: LNC %p LEB %d:%d len %d key "
                                           "%s\n", n, zbr->znode, zbr->lnum,
                                           zbr->offs, zbr->len,
-                                          DBGKEY(&zbr->key));
+                                          dbg_snprintf_key(c, &zbr->key,
+                                                           key_buf,
+                                                           DBG_KEY_BUF_LEN));
         }
         spin_unlock(&dbg_lock);
 }
@@ -1262,6 +1257,7 @@ static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1,
         int err, nlen1, nlen2, cmp;
         struct ubifs_dent_node *dent1, *dent2;
         union ubifs_key key;
+        char key_buf[DBG_KEY_BUF_LEN];
 
         ubifs_assert(!keys_cmp(c, &zbr1->key, &zbr2->key));
         dent1 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
@@ -1292,9 +1288,11 @@ static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1,
         key_read(c, &dent1->key, &key);
         if (keys_cmp(c, &zbr1->key, &key)) {
                 dbg_err("1st entry at %d:%d has key %s", zbr1->lnum,
-                        zbr1->offs, DBGKEY(&key));
+                        zbr1->offs, dbg_snprintf_key(c, &key, key_buf,
+                                                     DBG_KEY_BUF_LEN));
                 dbg_err("but it should have key %s according to tnc",
-                        DBGKEY(&zbr1->key));
+                        dbg_snprintf_key(c, &zbr1->key, key_buf,
+                                         DBG_KEY_BUF_LEN));
                 dbg_dump_node(c, dent1);
                 goto out_free;
         }
@@ -1302,9 +1300,11 @@ static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1,
         key_read(c, &dent2->key, &key);
         if (keys_cmp(c, &zbr2->key, &key)) {
                 dbg_err("2nd entry at %d:%d has key %s", zbr1->lnum,
-                        zbr1->offs, DBGKEY(&key));
+                        zbr1->offs, dbg_snprintf_key(c, &key, key_buf,
+                                                     DBG_KEY_BUF_LEN));
                 dbg_err("but it should have key %s according to tnc",
-                        DBGKEY(&zbr2->key));
+                        dbg_snprintf_key(c, &zbr2->key, key_buf,
+                                         DBG_KEY_BUF_LEN));
                 dbg_dump_node(c, dent2);
                 goto out_free;
         }
@@ -1321,7 +1321,7 @@ static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1,
                 dbg_err("2 xent/dent nodes with the same name");
         else
                 dbg_err("bad order of colliding key %s",
-                        DBGKEY(&key));
+                        dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN));
 
         ubifs_msg("first node at %d:%d\n", zbr1->lnum, zbr1->offs);
         dbg_dump_node(c, dent1);
diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index c9d294111a53..307ab1d23f75 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -169,41 +169,39 @@ struct ubifs_global_debug_info {
         spin_unlock(&dbg_lock);                                                \
 } while (0)
 
-const char *dbg_key_str0(const struct ubifs_info *c,
-                         const union ubifs_key *key);
-const char *dbg_key_str1(const struct ubifs_info *c,
-                         const union ubifs_key *key);
-
-/*
- * TODO: these macros are now broken because there is no locking around them
- * and we use a global buffer for the key string. This means that in case of
- * concurrent execution we will end up with incorrect and messy key strings.
- */
-#define DBGKEY(key) dbg_key_str0(c, (key))
-#define DBGKEY1(key) dbg_key_str1(c, (key))
-
-extern spinlock_t dbg_lock;
-
 #define ubifs_dbg_msg(type, fmt, ...) \
         pr_debug("UBIFS DBG " type ": " fmt "\n", ##__VA_ARGS__)
 
+#define DBG_KEY_BUF_LEN 32
+#define ubifs_dbg_msg_key(type, key, fmt, ...) do {                            \
+        char __tmp_key_buf[DBG_KEY_BUF_LEN];                                   \
+        pr_debug("UBIFS DBG " type ": " fmt "%s\n", ##__VA_ARGS__,             \
+                 dbg_snprintf_key(c, key, __tmp_key_buf, DBG_KEY_BUF_LEN));    \
+} while (0)
+
 /* Just a debugging messages not related to any specific UBIFS subsystem */
-#define dbg_msg(fmt, ...)                                                     \
-        printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid,  \
+#define dbg_msg(fmt, ...)                                                      \
+        printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid,   \
                __func__, ##__VA_ARGS__)
 
 /* General messages */
 #define dbg_gen(fmt, ...)   ubifs_dbg_msg("gen", fmt, ##__VA_ARGS__)
 /* Additional journal messages */
 #define dbg_jnl(fmt, ...)   ubifs_dbg_msg("jnl", fmt, ##__VA_ARGS__)
+#define dbg_jnlk(key, fmt, ...) \
+        ubifs_dbg_msg_key("jnl", key, fmt, ##__VA_ARGS__)
 /* Additional TNC messages */
 #define dbg_tnc(fmt, ...)   ubifs_dbg_msg("tnc", fmt, ##__VA_ARGS__)
+#define dbg_tnck(key, fmt, ...) \
+        ubifs_dbg_msg_key("tnc", key, fmt, ##__VA_ARGS__)
 /* Additional lprops messages */
 #define dbg_lp(fmt, ...)    ubifs_dbg_msg("lp", fmt, ##__VA_ARGS__)
 /* Additional LEB find messages */
 #define dbg_find(fmt, ...)  ubifs_dbg_msg("find", fmt, ##__VA_ARGS__)
 /* Additional mount messages */
 #define dbg_mnt(fmt, ...)   ubifs_dbg_msg("mnt", fmt, ##__VA_ARGS__)
+#define dbg_mntk(key, fmt, ...) \
+        ubifs_dbg_msg_key("mnt", key, fmt, ##__VA_ARGS__)
 /* Additional I/O messages */
 #define dbg_io(fmt, ...)    ubifs_dbg_msg("io", fmt, ##__VA_ARGS__)
 /* Additional commit messages */
@@ -219,6 +217,7 @@ extern spinlock_t dbg_lock;
 /* Additional recovery messages */
 #define dbg_rcvry(fmt, ...) ubifs_dbg_msg("rcvry", fmt, ##__VA_ARGS__)
 
+extern spinlock_t dbg_lock;
 extern struct ubifs_global_debug_info ubifs_dbg;
 
 static inline int dbg_is_chk_gen(const struct ubifs_info *c)
@@ -259,6 +258,8 @@ const char *dbg_cstate(int cmt_state);
 const char *dbg_jhead(int jhead);
 const char *dbg_get_key_dump(const struct ubifs_info *c,
                              const union ubifs_key *key);
+const char *dbg_snprintf_key(const struct ubifs_info *c,
+                             const union ubifs_key *key, char *buffer, int len);
 void dbg_dump_inode(struct ubifs_info *c, const struct inode *inode);
 void dbg_dump_node(const struct ubifs_info *c, const void *node);
 void dbg_dump_lpt_node(const struct ubifs_info *c, void *node, int lnum,
@@ -369,6 +370,10 @@ static inline const char *dbg_jhead(int jhead)                    { return ""; }
 static inline const char *
 dbg_get_key_dump(const struct ubifs_info *c,
                  const union ubifs_key *key)                      { return ""; }
+static inline const char *
+dbg_snprintf_key(const struct ubifs_info *c,
+                 const union ubifs_key *key, char *buffer,
+                 int len)                                         { return ""; }
 static inline void dbg_dump_inode(struct ubifs_info *c,
                                   const struct inode *inode)      { return; }
 static inline void dbg_dump_node(const struct ubifs_info *c,
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index cef0460f4c54..2f438ab2e7a2 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -697,9 +697,8 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
         int dlen = COMPRESSED_DATA_NODE_BUF_SZ, allocated = 1;
         struct ubifs_inode *ui = ubifs_inode(inode);
 
-        dbg_jnl("ino %lu, blk %u, len %d, key %s",
-                (unsigned long)key_inum(c, key), key_block(c, key), len,
-                DBGKEY(key));
+        dbg_jnlk(key, "ino %lu, blk %u, len %d, key ",
+                (unsigned long)key_inum(c, key), key_block(c, key), len);
         ubifs_assert(len <= UBIFS_BLOCK_SIZE);
 
         data = kmalloc(dlen, GFP_NOFS | __GFP_NOWARN);
@@ -1177,7 +1176,7 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
                 dn = (void *)trun + UBIFS_TRUN_NODE_SZ;
                 blk = new_size >> UBIFS_BLOCK_SHIFT;
                 data_key_init(c, &key, inum, blk);
-                dbg_jnl("last block key %s", DBGKEY(&key));
+                dbg_jnlk(&key, "last block key ");
                 err = ubifs_tnc_lookup(c, &key, dn);
                 if (err == -ENOENT)
                         dlen = 0; /* Not found (so it is a hole) */
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index ccabaf1164b3..b007637f0406 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -221,8 +221,8 @@ static int apply_replay_entry(struct ubifs_info *c, struct replay_entry *r)
 {
         int err;
 
-        dbg_mnt("LEB %d:%d len %d deletion %d sqnum %llu %s", r->lnum,
-                r->offs, r->len, r->deletion, r->sqnum, DBGKEY(&r->key));
+        dbg_mntk(&r->key, "LEB %d:%d len %d deletion %d sqnum %llu key ",
+                 r->lnum, r->offs, r->len, r->deletion, r->sqnum);
 
         /* Set c->replay_sqnum to help deal with dangling branches. */
         c->replay_sqnum = r->sqnum;
@@ -361,7 +361,7 @@ static int insert_node(struct ubifs_info *c, int lnum, int offs, int len,
 {
         struct replay_entry *r;
 
-        dbg_mnt("add LEB %d:%d, key %s", lnum, offs, DBGKEY(key));
+        dbg_mntk(key, "add LEB %d:%d, key ", lnum, offs);
 
         if (key_inum(c, key) >= c->highest_inum)
                 c->highest_inum = key_inum(c, key);
@@ -409,7 +409,7 @@ static int insert_dent(struct ubifs_info *c, int lnum, int offs, int len,
         struct replay_entry *r;
         char *nbuf;
 
-        dbg_mnt("add LEB %d:%d, key %s", lnum, offs, DBGKEY(key));
+        dbg_mntk(key, "add LEB %d:%d, key ", lnum, offs);
         if (key_inum(c, key) >= c->highest_inum)
                 c->highest_inum = key_inum(c, key);
 
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index 066738647685..cbd6dd310987 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -506,7 +506,7 @@ static int fallible_read_node(struct ubifs_info *c, const union ubifs_key *key,
 {
         int ret;
 
-        dbg_tnc("LEB %d:%d, key %s", zbr->lnum, zbr->offs, DBGKEY(key));
+        dbg_tnck(key, "LEB %d:%d, key ", zbr->lnum, zbr->offs);
 
         ret = try_read_node(c, node, key_type(c, key), zbr->len, zbr->lnum,
                             zbr->offs);
@@ -520,8 +520,8 @@ static int fallible_read_node(struct ubifs_info *c, const union ubifs_key *key,
                         ret = 0;
         }
         if (ret == 0 && c->replaying)
-                dbg_mnt("dangling branch LEB %d:%d len %d, key %s",
-                        zbr->lnum, zbr->offs, zbr->len, DBGKEY(key));
+                dbg_mntk(key, "dangling branch LEB %d:%d len %d, key ",
+                        zbr->lnum, zbr->offs, zbr->len);
         return ret;
 }
 
@@ -996,9 +996,9 @@ static int fallible_resolve_collision(struct ubifs_info *c,
         if (adding || !o_znode)
                 return 0;
 
-        dbg_mnt("dangling match LEB %d:%d len %d %s",
+        dbg_mntk(key, "dangling match LEB %d:%d len %d key ",
                 o_znode->zbranch[o_n].lnum, o_znode->zbranch[o_n].offs,
-                o_znode->zbranch[o_n].len, DBGKEY(key));
+                o_znode->zbranch[o_n].len);
         *zn = o_znode;
         *n = o_n;
         return 1;
@@ -1180,7 +1180,7 @@ int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key,
         struct ubifs_znode *znode;
         unsigned long time = get_seconds();
 
-        dbg_tnc("search key %s", DBGKEY(key));
+        dbg_tnck(key, "search key ");
         ubifs_assert(key_type(c, key) < UBIFS_INVALID_KEY);
 
         znode = c->zroot.znode;
@@ -1316,7 +1316,7 @@ static int lookup_level0_dirty(struct ubifs_info *c, const union ubifs_key *key,
         struct ubifs_znode *znode;
         unsigned long time = get_seconds();
 
-        dbg_tnc("search and dirty key %s", DBGKEY(key));
+        dbg_tnck(key, "search and dirty key ");
 
         znode = c->zroot.znode;
         if (unlikely(!znode)) {
@@ -1723,8 +1723,8 @@ static int validate_data_node(struct ubifs_info *c, void *buf,
         if (!keys_eq(c, &zbr->key, &key1)) {
                 ubifs_err("bad key in node at LEB %d:%d",
                           zbr->lnum, zbr->offs);
-                dbg_tnc("looked for key %s found node's key %s",
-                        DBGKEY(&zbr->key), DBGKEY1(&key1));
+                dbg_tnck(&zbr->key, "looked for key ");
+                dbg_tnck(&key1, "found node's key ");
                 goto out_err;
         }
 
@@ -1777,7 +1777,7 @@ int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu)
                 ubifs_err("failed to read from LEB %d:%d, error %d",
                           lnum, offs, err);
                 dbg_dump_stack();
-                dbg_tnc("key %s", DBGKEY(&bu->key));
+                dbg_tnck(&bu->key, "key ");
                 return err;
         }
 
@@ -1812,7 +1812,7 @@ static int do_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
         int found, n, err;
         struct ubifs_znode *znode;
 
-        dbg_tnc("name '%.*s' key %s", nm->len, nm->name, DBGKEY(key));
+        dbg_tnck(key, "name '%.*s' key ", nm->len, nm->name);
         mutex_lock(&c->tnc_mutex);
         found = ubifs_lookup_level0(c, key, &znode, &n);
         if (!found) {
@@ -1986,8 +1986,7 @@ again:
         zp = znode->parent;
         if (znode->child_cnt < c->fanout) {
                 ubifs_assert(n != c->fanout);
-                dbg_tnc("inserted at %d level %d, key %s", n, znode->level,
-                        DBGKEY(key));
+                dbg_tnck(key, "inserted at %d level %d, key ", n, znode->level);
 
                 insert_zbranch(znode, zbr, n);
 
@@ -2002,7 +2001,7 @@ again:
          * Unfortunately, @znode does not have more empty slots and we have to
          * split it.
          */
-        dbg_tnc("splitting level %d, key %s", znode->level, DBGKEY(key));
+        dbg_tnck(key, "splitting level %d, key ", znode->level);
 
         if (znode->alt)
                 /*
@@ -2096,7 +2095,7 @@ do_split:
         }
 
         /* Insert new key and branch */
-        dbg_tnc("inserting at %d level %d, key %s", n, zn->level, DBGKEY(key));
+        dbg_tnck(key, "inserting at %d level %d, key ", n, zn->level);
 
         insert_zbranch(zi, zbr, n);
 
@@ -2172,7 +2171,7 @@ int ubifs_tnc_add(struct ubifs_info *c, const union ubifs_key *key, int lnum,
         struct ubifs_znode *znode;
 
         mutex_lock(&c->tnc_mutex);
-        dbg_tnc("%d:%d, len %d, key %s", lnum, offs, len, DBGKEY(key));
+        dbg_tnck(key, "%d:%d, len %d, key ", lnum, offs, len);
         found = lookup_level0_dirty(c, key, &znode, &n);
         if (!found) {
                 struct ubifs_zbranch zbr;
@@ -2221,8 +2220,8 @@ int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key,
         struct ubifs_znode *znode;
 
         mutex_lock(&c->tnc_mutex);
-        dbg_tnc("old LEB %d:%d, new LEB %d:%d, len %d, key %s", old_lnum,
-                old_offs, lnum, offs, len, DBGKEY(key));
+        dbg_tnck(key, "old LEB %d:%d, new LEB %d:%d, len %d, key ", old_lnum,
+                 old_offs, lnum, offs, len);
         found = lookup_level0_dirty(c, key, &znode, &n);
         if (found < 0) {
                 err = found;
@@ -2304,8 +2303,8 @@ int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key,
         struct ubifs_znode *znode;
 
         mutex_lock(&c->tnc_mutex);
-        dbg_tnc("LEB %d:%d, name '%.*s', key %s", lnum, offs, nm->len, nm->name,
-                DBGKEY(key));
+        dbg_tnck(key, "LEB %d:%d, name '%.*s', key ",
+                 lnum, offs, nm->len, nm->name);
         found = lookup_level0_dirty(c, key, &znode, &n);
         if (found < 0) {
                 err = found;
@@ -2398,7 +2397,7 @@ static int tnc_delete(struct ubifs_info *c, struct ubifs_znode *znode, int n)
         /* Delete without merge for now */
         ubifs_assert(znode->level == 0);
         ubifs_assert(n >= 0 && n < c->fanout);
-        dbg_tnc("deleting %s", DBGKEY(&znode->zbranch[n].key));
+        dbg_tnck(&znode->zbranch[n].key, "deleting key ");
 
         zbr = &znode->zbranch[n];
         lnc_free(zbr);
@@ -2508,7 +2507,7 @@ int ubifs_tnc_remove(struct ubifs_info *c, const union ubifs_key *key)
         struct ubifs_znode *znode;
 
         mutex_lock(&c->tnc_mutex);
-        dbg_tnc("key %s", DBGKEY(key));
+        dbg_tnck(key, "key ");
         found = lookup_level0_dirty(c, key, &znode, &n);
         if (found < 0) {
                 err = found;
@@ -2539,7 +2538,7 @@ int ubifs_tnc_remove_nm(struct ubifs_info *c, const union ubifs_key *key,
         struct ubifs_znode *znode;
 
         mutex_lock(&c->tnc_mutex);
-        dbg_tnc("%.*s, key %s", nm->len, nm->name, DBGKEY(key));
+        dbg_tnck(key, "%.*s, key ", nm->len, nm->name);
         err = lookup_level0_dirty(c, key, &znode, &n);
         if (err < 0)
                 goto out_unlock;
@@ -2654,7 +2653,7 @@ int ubifs_tnc_remove_range(struct ubifs_info *c, union ubifs_key *from_key,
                                 dbg_dump_znode(c, znode);
                                 goto out_unlock;
                         }
-                        dbg_tnc("removing %s", DBGKEY(key));
+                        dbg_tnck(key, "removing key ");
                 }
                 if (k) {
                         for (i = n + 1 + k; i < znode->child_cnt; i++)
@@ -2774,7 +2773,7 @@ struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c,
         struct ubifs_zbranch *zbr;
         union ubifs_key *dkey;
 
-        dbg_tnc("%s %s", nm->name ? (char *)nm->name : "(lowest)", DBGKEY(key));
+        dbg_tnck(key, "%s ", nm->name ? (char *)nm->name : "(lowest)");
         ubifs_assert(is_hash_key(c, key));
 
         mutex_lock(&c->tnc_mutex);
@@ -3333,9 +3332,9 @@ int dbg_check_inode_size(struct ubifs_info *c, const struct inode *inode,
 
 out_dump:
         block = key_block(c, key);
-        ubifs_err("inode %lu has size %lld, but there are data at offset %lld "
-                  "(data key %s)", (unsigned long)inode->i_ino, size,
-                  ((loff_t)block) << UBIFS_BLOCK_SHIFT, DBGKEY(key));
+        ubifs_err("inode %lu has size %lld, but there are data at offset %lld",
+                  (unsigned long)inode->i_ino, size,
+                  ((loff_t)block) << UBIFS_BLOCK_SHIFT);
         mutex_unlock(&c->tnc_mutex);
         dbg_dump_inode(c, inode);
         dbg_dump_stack();
diff --git a/fs/ubifs/tnc_misc.c b/fs/ubifs/tnc_misc.c
index b48db999903e..dc28fe6ec07a 100644
--- a/fs/ubifs/tnc_misc.c
+++ b/fs/ubifs/tnc_misc.c
@@ -328,8 +328,8 @@ static int read_znode(struct ubifs_info *c, int lnum, int offs, int len,
                 case UBIFS_XENT_KEY:
                         break;
                 default:
-                        dbg_msg("bad key type at slot %d: %s", i,
-                                DBGKEY(&zbr->key));
+                        dbg_msg("bad key type at slot %d: %d",
+                                i, key_type(c, &zbr->key));
                         err = 3;
                         goto out_dump;
                 }
@@ -475,7 +475,7 @@ int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
                                       zbr->offs);
 
         if (err) {
-                dbg_tnc("key %s", DBGKEY(key));
+                dbg_tnck(key, "key ");
                 return err;
         }
 
@@ -484,8 +484,8 @@ int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
         if (!keys_eq(c, key, &key1)) {
                 ubifs_err("bad key in node at LEB %d:%d",
                           zbr->lnum, zbr->offs);
-                dbg_tnc("looked for key %s found node's key %s",
-                        DBGKEY(key), DBGKEY1(&key1));
+                dbg_tnck(key, "looked for key ");
+                dbg_tnck(&key1, "but found node's key ");
                 dbg_dump_node(c, node);
                 return -EINVAL;
         }