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Message-Id: <1200002792-8449-6-git-send-email-marcin.slusarz@gmail.com>
Date: Thu, 10 Jan 2008 23:06:21 +0100
From: marcin.slusarz@...il.com
To: LKML <linux-kernel@...r.kernel.org>
Cc: Marcin Slusarz <marcin.slusarz@...il.com>,
Ben Fennema <bfennema@...con.csc.calpoly.edu>,
Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@...radead.org>
Subject: [PATCH 05/16] udf: convert macros related to bitmaps to functions
convert UDF_SB_ALLOC_BITMAP macro to udf_sb_alloc_bitmap function
convert UDF_SB_FREE_BITMAP macro to udf_sb_free_bitmap function
Signed-off-by: Marcin Slusarz <marcin.slusarz@...il.com>
CC: Ben Fennema <bfennema@...con.csc.calpoly.edu>
CC: Jan Kara <jack@...e.cz>
CC: Christoph Hellwig <hch@...radead.org>
---
fs/udf/super.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++-----
fs/udf/udf_sb.h | 38 ----------------------------------
2 files changed, 55 insertions(+), 44 deletions(-)
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9257796..2344157 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -937,6 +937,39 @@ static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
root->logicalBlockNum, root->partitionReferenceNum);
}
+static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
+{
+ struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[index];
+ struct udf_bitmap *bitmap;
+ int nr_groups;
+ int size;
+
+ /* TODO: move calculating of nr_groups into helper function */
+ nr_groups = (map->s_partition_len +
+ (sizeof(struct spaceBitmapDesc) << 3) +
+ (sb->s_blocksize * 8) - 1) /
+ (sb->s_blocksize * 8);
+ size = sizeof(struct udf_bitmap) +
+ (sizeof(struct buffer_head *) * nr_groups);
+
+ if (size <= PAGE_SIZE)
+ bitmap = kmalloc(size, GFP_KERNEL);
+ else
+ bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
+
+ if (bitmap == NULL) {
+ udf_error(sb, __FUNCTION__,
+ "Unable to allocate space for bitmap "
+ "and %d buffer_head pointers", nr_groups);
+ return NULL;
+ }
+
+ memset(bitmap, 0x00, size);
+ bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
+ bitmap->s_nr_groups = nr_groups;
+ return bitmap;
+}
+
static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
{
struct partitionDesc *p;
@@ -987,7 +1020,7 @@ static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
i, map->s_uspace.s_table->i_ino);
}
if (phd->unallocSpaceBitmap.extLength) {
- UDF_SB_ALLOC_BITMAP(sb, i, s_uspace);
+ map->s_uspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
if (map->s_uspace.s_bitmap != NULL) {
map->s_uspace.s_bitmap->s_extLength =
le32_to_cpu(phd->unallocSpaceBitmap.extLength);
@@ -1017,7 +1050,7 @@ static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
i, map->s_fspace.s_table->i_ino);
}
if (phd->freedSpaceBitmap.extLength) {
- UDF_SB_ALLOC_BITMAP(sb, i, s_fspace);
+ map->s_fspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
if (map->s_fspace.s_bitmap != NULL) {
map->s_fspace.s_bitmap->s_extLength =
le32_to_cpu(phd->freedSpaceBitmap.extLength);
@@ -1504,6 +1537,22 @@ static void udf_close_lvid(struct super_block *sb)
}
}
+static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
+{
+ int i;
+ int nr_groups = bitmap->s_nr_groups;
+ int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);
+
+ for (i = 0; i < nr_groups; i++)
+ if (bitmap->s_block_bitmap[i])
+ brelse(bitmap->s_block_bitmap[i]);
+
+ if (size <= PAGE_SIZE)
+ kfree(bitmap);
+ else
+ vfree(bitmap);
+}
+
/*
* udf_read_super
*
@@ -1689,9 +1738,9 @@ error_out:
if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
iput(map->s_fspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
- UDF_SB_FREE_BITMAP(sb, sbi->s_partition, s_uspace);
+ udf_sb_free_bitmap(map->s_uspace.s_bitmap);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- UDF_SB_FREE_BITMAP(sb, sbi->s_partition, s_fspace);
+ udf_sb_free_bitmap(map->s_fspace.s_bitmap);
if (map->s_partition_type == UDF_SPARABLE_MAP15)
for (i = 0; i < 4; i++)
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
@@ -1767,9 +1816,9 @@ static void udf_put_super(struct super_block *sb)
if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
iput(map->s_fspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
- UDF_SB_FREE_BITMAP(sb, sbi->s_partition, s_uspace);
+ udf_sb_free_bitmap(map->s_uspace.s_bitmap);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- UDF_SB_FREE_BITMAP(sb, sbi->s_partition, s_fspace);
+ udf_sb_free_bitmap(map->s_fspace.s_bitmap);
if (map->s_partition_type == UDF_SPARABLE_MAP15)
for (i = 0; i < 4; i++)
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 4d3bd77..2c05f82 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -43,46 +43,8 @@ static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
-#define UDF_SB_ALLOC_BITMAP(X,Y,Z)\
-{\
- struct udf_sb_info *sbi = UDF_SB(X);\
- int nr_groups = ((sbi->s_partmaps[(Y)].s_partition_len + (sizeof(struct spaceBitmapDesc) << 3) +\
- ((X)->s_blocksize * 8) - 1) / ((X)->s_blocksize * 8));\
- int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
- if (size <= PAGE_SIZE)\
- sbi->s_partmaps[(Y)].Z.s_bitmap = kmalloc(size, GFP_KERNEL);\
- else\
- sbi->s_partmaps[(Y)].Z.s_bitmap = vmalloc(size);\
- if (sbi->s_partmaps[(Y)].Z.s_bitmap != NULL) {\
- memset(sbi->s_partmaps[(Y)].Z.s_bitmap, 0x00, size);\
- sbi->s_partmaps[(Y)].Z.s_bitmap->s_block_bitmap =\
- (struct buffer_head **)(sbi->s_partmaps[(Y)].Z.s_bitmap + 1);\
- sbi->s_partmaps[(Y)].Z.s_bitmap->s_nr_groups = nr_groups;\
- } else {\
- udf_error(X, __FUNCTION__, "Unable to allocate space for bitmap and %d buffer_head pointers", nr_groups);\
- }\
-}
-
-#define UDF_SB_FREE_BITMAP(X,Y,Z)\
-{\
- int i;\
- int nr_groups = UDF_SB_BITMAP_NR_GROUPS(X,Y,Z);\
- int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
- for (i = 0; i < nr_groups; i++) {\
- if (UDF_SB_BITMAP(X,Y,Z,i))\
- brelse(UDF_SB_BITMAP(X,Y,Z,i));\
- }\
- if (size <= PAGE_SIZE)\
- kfree(UDF_SB(X)->s_partmaps[Y].Z.s_bitmap);\
- else\
- vfree(UDF_SB(X)->s_partmaps[Y].Z.s_bitmap);\
-}
-
#define UDF_QUERY_FLAG(X,Y) ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
#define UDF_SET_FLAG(X,Y) ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
#define UDF_CLEAR_FLAG(X,Y) ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )
-#define UDF_SB_BITMAP(X,Y,Z,I) ( UDF_SB(X)->s_partmaps[(Y)].Z.s_bitmap->s_block_bitmap[I] )
-#define UDF_SB_BITMAP_NR_GROUPS(X,Y,Z) ( UDF_SB(X)->s_partmaps[(Y)].Z.s_bitmap->s_nr_groups )
-
#endif /* __LINUX_UDF_SB_H */
--
1.5.3.7
--
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