ext4: Enhance ext4_grp_locked_error() to take block and function numbers

Also use a macro definition so that __func__ and __LINE__ is implicit.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index d8ec824..5a41881 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1639,9 +1639,13 @@ extern void __ext4_warning(struct super_block *, const char *,
 #define ext4_warning(sb, message...)   __ext4_warning(sb, __func__, ## message)
 extern void ext4_msg(struct super_block *, const char *, const char *, ...)
        __attribute__ ((format (printf, 3, 4)));
-extern void ext4_grp_locked_error(struct super_block *, ext4_group_t,
-                               const char *, const char *, ...)
-       __attribute__ ((format (printf, 4, 5)));
+extern void __ext4_grp_locked_error(const char *, unsigned int, \
+                                   struct super_block *, ext4_group_t, \
+                                   unsigned long, ext4_fsblk_t, \
+                                   const char *, ...)
+       __attribute__ ((format (printf, 7, 8)));
+#define ext4_grp_locked_error(sb, grp, message...) \
+       __ext4_grp_locked_error(__func__, __LINE__, (sb), (grp), ## message)
 extern void ext4_update_dynamic_rev(struct super_block *sb);
 extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
                                        __u32 compat);

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b485987..64baadb 100644 (file)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1128,8 +1128,8 @@ void ext4_da_update_reserve_space(struct inode *inode,
                ext4_discard_preallocations(inode);
 }
 
-static int check_block_validity(struct inode *inode, const char *func,
-                               struct ext4_map_blocks *map)
+static int __check_block_validity(struct inode *inode, const char *func,
+                                 struct ext4_map_blocks *map)
 {
        if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), map->m_pblk,
                                   map->m_len)) {
@@ -1142,6 +1142,9 @@ static int check_block_validity(struct inode *inode, const char *func,
        return 0;
 }
 
+#define check_block_validity(inode, map)       \
+       __check_block_validity((inode), __func__, (map))
+
 /*
  * Return the number of contiguous dirty pages in a given inode
  * starting at page frame idx.
@@ -1244,7 +1247,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
        up_read((&EXT4_I(inode)->i_data_sem));
 
        if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
-               int ret = check_block_validity(inode, __func__, map);
+               int ret = check_block_validity(inode, map);
                if (ret != 0)
                        return ret;
        }
@@ -1324,9 +1327,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
 
        up_write((&EXT4_I(inode)->i_data_sem));
        if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
-               int ret = check_block_validity(inode,
-                                              "ext4_map_blocks_after_alloc",
-                                              map);
+               int ret = check_block_validity(inode, map);
                if (ret != 0)
                        return ret;
        }

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index b2948b0..3dfad95 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -446,10 +446,11 @@ static void mb_free_blocks_double(struct inode *inode, struct ext4_buddy *e4b,
                        blocknr = ext4_group_first_block_no(sb, e4b->bd_group);
                        blocknr += first + i;
                        ext4_grp_locked_error(sb, e4b->bd_group,
-                                  __func__, "double-free of inode"
-                                  " %lu's block %llu(bit %u in group %u)",
-                                  inode ? inode->i_ino : 0, blocknr,
-                                  first + i, e4b->bd_group);
+                                             inode ? inode->i_ino : 0,
+                                             blocknr,
+                                             "freeing block already freed "
+                                             "(bit %u)",
+                                             first + i);
                }
                mb_clear_bit(first + i, e4b->bd_info->bb_bitmap);
        }
@@ -712,9 +713,9 @@ void ext4_mb_generate_buddy(struct super_block *sb,
        grp->bb_fragments = fragments;
 
        if (free != grp->bb_free) {
-               ext4_grp_locked_error(sb, group,  __func__,
-                       "EXT4-fs: group %u: %u blocks in bitmap, %u in gd",
-                       group, free, grp->bb_free);
+               ext4_grp_locked_error(sb, group, 0, 0,
+                                     "%u blocks in bitmap, %u in gd",
+                                     free, grp->bb_free);
                /*
                 * If we intent to continue, we consider group descritor
                 * corrupt and update bb_free using bitmap value
@@ -1296,10 +1297,10 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
                        blocknr = ext4_group_first_block_no(sb, e4b->bd_group);
                        blocknr += block;
                        ext4_grp_locked_error(sb, e4b->bd_group,
-                                  __func__, "double-free of inode"
-                                  " %lu's block %llu(bit %u in group %u)",
-                                  inode ? inode->i_ino : 0, blocknr, block,
-                                  e4b->bd_group);
+                                             inode ? inode->i_ino : 0,
+                                             blocknr,
+                                             "freeing already freed block "
+                                             "(bit %u)", block);
                }
                mb_clear_bit(block, EXT4_MB_BITMAP(e4b));
                e4b->bd_info->bb_counters[order]++;
@@ -1788,8 +1789,8 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
                         * free blocks even though group info says we
                         * we have free blocks
                         */
-                       ext4_grp_locked_error(sb, e4b->bd_group,
-                                       __func__, "%d free blocks as per "
+                       ext4_grp_locked_error(sb, e4b->bd_group, 0, 0,
+                                       "%d free blocks as per "
                                        "group info. But bitmap says 0",
                                        free);
                        break;
@@ -1798,8 +1799,8 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
                mb_find_extent(e4b, 0, i, ac->ac_g_ex.fe_len, &ex);
                BUG_ON(ex.fe_len <= 0);
                if (free < ex.fe_len) {
-                       ext4_grp_locked_error(sb, e4b->bd_group,
-                                       __func__, "%d free blocks as per "
+                       ext4_grp_locked_error(sb, e4b->bd_group, 0, 0,
+                                       "%d free blocks as per "
                                        "group info. But got %d blocks",
                                        free, ex.fe_len);
                        /*
@@ -3584,8 +3585,7 @@ ext4_mb_release_inode_pa(struct ext4_buddy *e4b, struct buffer_head *bitmap_bh,
                        pa, (unsigned long) pa->pa_lstart,
                        (unsigned long) pa->pa_pstart,
                        (unsigned long) pa->pa_len);
-               ext4_grp_locked_error(sb, group,
-                                       __func__, "free %u, pa_free %u",
+               ext4_grp_locked_error(sb, group, 0, 0, "free %u, pa_free %u",
                                        free, pa->pa_free);
                /*
                 * pa is already deleted so we use the value obtained
@@ -4395,6 +4395,7 @@ static noinline_for_stack int
 ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
                      struct ext4_free_data *new_entry)
 {
+       ext4_group_t group = e4b->bd_group;
        ext4_grpblk_t block;
        struct ext4_free_data *entry;
        struct ext4_group_info *db = e4b->bd_info;
@@ -4427,9 +4428,9 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
                else if (block >= (entry->start_blk + entry->count))
                        n = &(*n)->rb_right;
                else {
-                       ext4_grp_locked_error(sb, e4b->bd_group, __func__,
-                                       "Double free of blocks %d (%d %d)",
-                                       block, entry->start_blk, entry->count);
+                       ext4_grp_locked_error(sb, group, 0,
+                               ext4_group_first_block_no(sb, group) + block,
+                               "Block already on to-be-freed list");
                        return 0;
                }
        }

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 11441e4..39aeb45 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -514,8 +514,10 @@ void __ext4_warning(struct super_block *sb, const char *function,
        va_end(args);
 }
 
-void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp,
-                          const char *function, const char *fmt, ...)
+void __ext4_grp_locked_error(const char *function, unsigned int line,
+                            struct super_block *sb, ext4_group_t grp,
+                            unsigned long ino, ext4_fsblk_t block,
+                            const char *fmt, ...)
 __releases(bitlock)
 __acquires(bitlock)
 {
@@ -523,7 +525,12 @@ __acquires(bitlock)
        struct ext4_super_block *es = EXT4_SB(sb)->s_es;
 
        va_start(args, fmt);
-       printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function);
+       printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u",
+              sb->s_id, function, line, grp);
+       if (ino)
+               printk("inode %lu: ", ino);
+       if (block)
+               printk("block %llu:", (unsigned long long) block);
        vprintk(fmt, args);
        printk("\n");
        va_end(args);