Merge branch 'for_linus' of git://git.infradead.org/~dedekind/ubifs-2.6

* 'for_linus' of git://git.infradead.org/~dedekind/ubifs-2.6:
  UBIFS: include to compilation
  UBIFS: add new flash file system
  UBIFS: add brief documentation
  MAINTAINERS: add UBIFS section
  do_mounts: allow UBI root device name
  VFS: export sync_sb_inodes
  VFS: move inode_lock into sync_sb_inodes

1 files changed, 403 insertions, 0 deletions

diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
new file mode 100644
index 000000000000..3c4f1e93c9e0
--- /dev/null
+++ b/fs/ubifs/debug.h
@@ -0,0 +1,403 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ *          Adrian Hunter
+ */
+
+#ifndef __UBIFS_DEBUG_H__
+#define __UBIFS_DEBUG_H__
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+#define UBIFS_DBG(op) op
+
+#define ubifs_assert(expr)  do {                                               \
+        if (unlikely(!(expr))) {                                               \
+                printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
+                       __func__, __LINE__, current->pid);                      \
+                dbg_dump_stack();                                              \
+        }                                                                      \
+} while (0)
+
+#define ubifs_assert_cmt_locked(c) do {                                        \
+        if (unlikely(down_write_trylock(&(c)->commit_sem))) {                  \
+                up_write(&(c)->commit_sem);                                    \
+                printk(KERN_CRIT "commit lock is not locked!\n");              \
+                ubifs_assert(0);                                               \
+        }                                                                      \
+} while (0)
+
+#define dbg_dump_stack() do {                                                  \
+        if (!dbg_failure_mode)                                                 \
+                dump_stack();                                                  \
+} while (0)
+
+/* Generic debugging messages */
+#define dbg_msg(fmt, ...) do {                                                 \
+        spin_lock(&dbg_lock);                                                  \
+        printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid,   \
+               __func__, ##__VA_ARGS__);                                       \
+        spin_unlock(&dbg_lock);                                                \
+} while (0)
+
+#define dbg_do_msg(typ, fmt, ...) do {                                         \
+        if (ubifs_msg_flags & typ)                                             \
+                dbg_msg(fmt, ##__VA_ARGS__);                                   \
+} while (0)
+
+#define dbg_err(fmt, ...) do {                                                 \
+        spin_lock(&dbg_lock);                                                  \
+        ubifs_err(fmt, ##__VA_ARGS__);                                         \
+        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);
+
+/*
+ * DBGKEY macros require dbg_lock to be held, which it is in the dbg message
+ * macros.
+ */
+#define DBGKEY(key) dbg_key_str0(c, (key))
+#define DBGKEY1(key) dbg_key_str1(c, (key))
+
+/* General messages */
+#define dbg_gen(fmt, ...)        dbg_do_msg(UBIFS_MSG_GEN, fmt, ##__VA_ARGS__)
+
+/* Additional journal messages */
+#define dbg_jnl(fmt, ...)        dbg_do_msg(UBIFS_MSG_JNL, fmt, ##__VA_ARGS__)
+
+/* Additional TNC messages */
+#define dbg_tnc(fmt, ...)        dbg_do_msg(UBIFS_MSG_TNC, fmt, ##__VA_ARGS__)
+
+/* Additional lprops messages */
+#define dbg_lp(fmt, ...)         dbg_do_msg(UBIFS_MSG_LP, fmt, ##__VA_ARGS__)
+
+/* Additional LEB find messages */
+#define dbg_find(fmt, ...)       dbg_do_msg(UBIFS_MSG_FIND, fmt, ##__VA_ARGS__)
+
+/* Additional mount messages */
+#define dbg_mnt(fmt, ...)        dbg_do_msg(UBIFS_MSG_MNT, fmt, ##__VA_ARGS__)
+
+/* Additional I/O messages */
+#define dbg_io(fmt, ...)         dbg_do_msg(UBIFS_MSG_IO, fmt, ##__VA_ARGS__)
+
+/* Additional commit messages */
+#define dbg_cmt(fmt, ...)        dbg_do_msg(UBIFS_MSG_CMT, fmt, ##__VA_ARGS__)
+
+/* Additional budgeting messages */
+#define dbg_budg(fmt, ...)       dbg_do_msg(UBIFS_MSG_BUDG, fmt, ##__VA_ARGS__)
+
+/* Additional log messages */
+#define dbg_log(fmt, ...)        dbg_do_msg(UBIFS_MSG_LOG, fmt, ##__VA_ARGS__)
+
+/* Additional gc messages */
+#define dbg_gc(fmt, ...)         dbg_do_msg(UBIFS_MSG_GC, fmt, ##__VA_ARGS__)
+
+/* Additional scan messages */
+#define dbg_scan(fmt, ...)       dbg_do_msg(UBIFS_MSG_SCAN, fmt, ##__VA_ARGS__)
+
+/* Additional recovery messages */
+#define dbg_rcvry(fmt, ...)      dbg_do_msg(UBIFS_MSG_RCVRY, fmt, ##__VA_ARGS__)
+
+/*
+ * Debugging message type flags (must match msg_type_names in debug.c).
+ *
+ * UBIFS_MSG_GEN: general messages
+ * UBIFS_MSG_JNL: journal messages
+ * UBIFS_MSG_MNT: mount messages
+ * UBIFS_MSG_CMT: commit messages
+ * UBIFS_MSG_FIND: LEB find messages
+ * UBIFS_MSG_BUDG: budgeting messages
+ * UBIFS_MSG_GC: garbage collection messages
+ * UBIFS_MSG_TNC: TNC messages
+ * UBIFS_MSG_LP: lprops messages
+ * UBIFS_MSG_IO: I/O messages
+ * UBIFS_MSG_LOG: log messages
+ * UBIFS_MSG_SCAN: scan messages
+ * UBIFS_MSG_RCVRY: recovery messages
+ */
+enum {
+        UBIFS_MSG_GEN   = 0x1,
+        UBIFS_MSG_JNL   = 0x2,
+        UBIFS_MSG_MNT   = 0x4,
+        UBIFS_MSG_CMT   = 0x8,
+        UBIFS_MSG_FIND  = 0x10,
+        UBIFS_MSG_BUDG  = 0x20,
+        UBIFS_MSG_GC    = 0x40,
+        UBIFS_MSG_TNC   = 0x80,
+        UBIFS_MSG_LP    = 0x100,
+        UBIFS_MSG_IO    = 0x200,
+        UBIFS_MSG_LOG   = 0x400,
+        UBIFS_MSG_SCAN  = 0x800,
+        UBIFS_MSG_RCVRY = 0x1000,
+};
+
+/* Debugging message type flags for each default debug message level */
+#define UBIFS_MSG_LVL_0 0
+#define UBIFS_MSG_LVL_1 0x1
+#define UBIFS_MSG_LVL_2 0x7f
+#define UBIFS_MSG_LVL_3 0xffff
+
+/*
+ * Debugging check flags (must match chk_names in debug.c).
+ *
+ * UBIFS_CHK_GEN: general checks
+ * UBIFS_CHK_TNC: check TNC
+ * UBIFS_CHK_IDX_SZ: check index size
+ * UBIFS_CHK_ORPH: check orphans
+ * UBIFS_CHK_OLD_IDX: check the old index
+ * UBIFS_CHK_LPROPS: check lprops
+ * UBIFS_CHK_FS: check the file-system
+ */
+enum {
+        UBIFS_CHK_GEN     = 0x1,
+        UBIFS_CHK_TNC     = 0x2,
+        UBIFS_CHK_IDX_SZ  = 0x4,
+        UBIFS_CHK_ORPH    = 0x8,
+        UBIFS_CHK_OLD_IDX = 0x10,
+        UBIFS_CHK_LPROPS  = 0x20,
+        UBIFS_CHK_FS      = 0x40,
+};
+
+/*
+ * Special testing flags (must match tst_names in debug.c).
+ *
+ * UBIFS_TST_FORCE_IN_THE_GAPS: force the use of in-the-gaps method
+ * UBIFS_TST_RCVRY: failure mode for recovery testing
+ */
+enum {
+        UBIFS_TST_FORCE_IN_THE_GAPS = 0x2,
+        UBIFS_TST_RCVRY             = 0x4,
+};
+
+#if CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 1
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_1
+#elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 2
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_2
+#elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 3
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_3
+#else
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_0
+#endif
+
+#ifdef CONFIG_UBIFS_FS_DEBUG_CHKS
+#define UBIFS_CHK_FLAGS_DEFAULT 0xffffffff
+#else
+#define UBIFS_CHK_FLAGS_DEFAULT 0
+#endif
+
+extern spinlock_t dbg_lock;
+
+extern unsigned int ubifs_msg_flags;
+extern unsigned int ubifs_chk_flags;
+extern unsigned int ubifs_tst_flags;
+
+/* Dump functions */
+
+const char *dbg_ntype(int type);
+const char *dbg_cstate(int cmt_state);
+const char *dbg_get_key_dump(const struct ubifs_info *c,
+                             const union ubifs_key *key);
+void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode);
+void dbg_dump_node(const struct ubifs_info *c, const void *node);
+void dbg_dump_budget_req(const struct ubifs_budget_req *req);
+void dbg_dump_lstats(const struct ubifs_lp_stats *lst);
+void dbg_dump_budg(struct ubifs_info *c);
+void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp);
+void dbg_dump_lprops(struct ubifs_info *c);
+void dbg_dump_leb(const struct ubifs_info *c, int lnum);
+void dbg_dump_znode(const struct ubifs_info *c,
+                    const struct ubifs_znode *znode);
+void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat);
+void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
+                    struct ubifs_nnode *parent, int iip);
+void dbg_dump_tnc(struct ubifs_info *c);
+void dbg_dump_index(struct ubifs_info *c);
+
+/* Checking helper functions */
+
+typedef int (*dbg_leaf_callback)(struct ubifs_info *c,
+                                 struct ubifs_zbranch *zbr, void *priv);
+typedef int (*dbg_znode_callback)(struct ubifs_info *c,
+                                  struct ubifs_znode *znode, void *priv);
+
+int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
+                   dbg_znode_callback znode_cb, void *priv);
+
+/* Checking functions */
+
+int dbg_check_lprops(struct ubifs_info *c);
+
+int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot);
+int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot);
+
+int dbg_check_cats(struct ubifs_info *c);
+
+int dbg_check_ltab(struct ubifs_info *c);
+
+int dbg_check_synced_i_size(struct inode *inode);
+
+int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir);
+
+int dbg_check_tnc(struct ubifs_info *c, int extra);
+
+int dbg_check_idx_size(struct ubifs_info *c, long long idx_size);
+
+int dbg_check_filesystem(struct ubifs_info *c);
+
+void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat,
+                    int add_pos);
+
+int dbg_check_lprops(struct ubifs_info *c);
+int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode,
+                        int row, int col);
+
+/* Force the use of in-the-gaps method for testing */
+
+#define dbg_force_in_the_gaps_enabled \
+        (ubifs_tst_flags & UBIFS_TST_FORCE_IN_THE_GAPS)
+
+int dbg_force_in_the_gaps(void);
+
+/* Failure mode for recovery testing */
+
+#define dbg_failure_mode (ubifs_tst_flags & UBIFS_TST_RCVRY)
+
+void dbg_failure_mode_registration(struct ubifs_info *c);
+void dbg_failure_mode_deregistration(struct ubifs_info *c);
+
+#ifndef UBIFS_DBG_PRESERVE_UBI
+
+#define ubi_leb_read   dbg_leb_read
+#define ubi_leb_write  dbg_leb_write
+#define ubi_leb_change dbg_leb_change
+#define ubi_leb_erase  dbg_leb_erase
+#define ubi_leb_unmap  dbg_leb_unmap
+#define ubi_is_mapped  dbg_is_mapped
+#define ubi_leb_map    dbg_leb_map
+
+#endif
+
+int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
+                 int len, int check);
+int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
+                  int offset, int len, int dtype);
+int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
+                   int len, int dtype);
+int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum);
+int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum);
+int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum);
+int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);
+
+static inline int dbg_read(struct ubi_volume_desc *desc, int lnum, char *buf,
+                           int offset, int len)
+{
+        return dbg_leb_read(desc, lnum, buf, offset, len, 0);
+}
+
+static inline int dbg_write(struct ubi_volume_desc *desc, int lnum,
+                            const void *buf, int offset, int len)
+{
+        return dbg_leb_write(desc, lnum, buf, offset, len, UBI_UNKNOWN);
+}
+
+static inline int dbg_change(struct ubi_volume_desc *desc, int lnum,
+                                    const void *buf, int len)
+{
+        return dbg_leb_change(desc, lnum, buf, len, UBI_UNKNOWN);
+}
+
+#else /* !CONFIG_UBIFS_FS_DEBUG */
+
+#define UBIFS_DBG(op)
+#define ubifs_assert(expr)                         ({})
+#define ubifs_assert_cmt_locked(c)
+#define dbg_dump_stack()
+#define dbg_err(fmt, ...)                          ({})
+#define dbg_msg(fmt, ...)                          ({})
+#define dbg_key(c, key, fmt, ...)                  ({})
+
+#define dbg_gen(fmt, ...)                          ({})
+#define dbg_jnl(fmt, ...)                          ({})
+#define dbg_tnc(fmt, ...)                          ({})
+#define dbg_lp(fmt, ...)                           ({})
+#define dbg_find(fmt, ...)                         ({})
+#define dbg_mnt(fmt, ...)                          ({})
+#define dbg_io(fmt, ...)                           ({})
+#define dbg_cmt(fmt, ...)                          ({})
+#define dbg_budg(fmt, ...)                         ({})
+#define dbg_log(fmt, ...)                          ({})
+#define dbg_gc(fmt, ...)                           ({})
+#define dbg_scan(fmt, ...)                         ({})
+#define dbg_rcvry(fmt, ...)                        ({})
+
+#define dbg_ntype(type)                            ""
+#define dbg_cstate(cmt_state)                      ""
+#define dbg_get_key_dump(c, key)                   ({})
+#define dbg_dump_inode(c, inode)                   ({})
+#define dbg_dump_node(c, node)                     ({})
+#define dbg_dump_budget_req(req)                   ({})
+#define dbg_dump_lstats(lst)                       ({})
+#define dbg_dump_budg(c)                           ({})
+#define dbg_dump_lprop(c, lp)                      ({})
+#define dbg_dump_lprops(c)                         ({})
+#define dbg_dump_leb(c, lnum)                      ({})
+#define dbg_dump_znode(c, znode)                   ({})
+#define dbg_dump_heap(c, heap, cat)                ({})
+#define dbg_dump_pnode(c, pnode, parent, iip)      ({})
+#define dbg_dump_tnc(c)                            ({})
+#define dbg_dump_index(c)                          ({})
+
+#define dbg_walk_index(c, leaf_cb, znode_cb, priv) 0
+
+#define dbg_old_index_check_init(c, zroot)         0
+#define dbg_check_old_index(c, zroot)              0
+
+#define dbg_check_cats(c)                          0
+
+#define dbg_check_ltab(c)                          0
+
+#define dbg_check_synced_i_size(inode)             0
+
+#define dbg_check_dir_size(c, dir)                 0
+
+#define dbg_check_tnc(c, x)                        0
+
+#define dbg_check_idx_size(c, idx_size)            0
+
+#define dbg_check_filesystem(c)                    0
+
+#define dbg_check_heap(c, heap, cat, add_pos)      ({})
+
+#define dbg_check_lprops(c)                        0
+#define dbg_check_lpt_nodes(c, cnode, row, col)    0
+
+#define dbg_force_in_the_gaps_enabled              0
+#define dbg_force_in_the_gaps()                    0
+
+#define dbg_failure_mode                           0
+#define dbg_failure_mode_registration(c)           ({})
+#define dbg_failure_mode_deregistration(c)         ({})
+
+#endif /* !CONFIG_UBIFS_FS_DEBUG */
+
+#endif /* !__UBIFS_DEBUG_H__ */