| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 11 Apr 2008 11:36:16 -0400
From: Josef Bacik <jbacik@...hat.com>
To: tytso@....edu
Cc: linux-ext4@...r.kernel.org
Subject: [RFC][PATCH 2/2] convert alloc.c to use blk64_t
Hello,
commit 0b80dee54f94f13210ae87a504e3b49d3dc284d4
Author: Josef Bacik <jbacik@...hat.com>
Date: Fri Apr 11 18:23:13 2008 -0400
Convert the block alloc functions to be 64bit capable.
Signed-off-by: Josef Bacik <jbacik@...hat.com>
diff --git a/lib/ext2fs/alloc.c b/lib/ext2fs/alloc.c
index 65f3ea1..6924457 100644
--- a/lib/ext2fs/alloc.c
+++ b/lib/ext2fs/alloc.c
@@ -73,10 +73,10 @@ errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir,
* Stupid algorithm --- we now just search forward starting from the
* goal. Should put in a smarter one someday....
*/
-errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
- ext2fs_block_bitmap map, blk_t *ret)
+errcode_t ext2fs_new_block64(ext2_filsys fs, blk64_t goal,
+ ext2fs_block_bitmap map, blk64_t *ret)
{
- blk_t i;
+ blk64_t i;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
@@ -84,7 +84,7 @@ errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
map = fs->block_map;
if (!map)
return EXT2_ET_NO_BLOCK_BITMAP;
- if (!goal || (goal >= fs->super->s_blocks_count))
+ if (!goal || (goal >= ext2fs_super_blocks_count(fs)))
goal = fs->super->s_first_data_block;
i = goal;
do {
@@ -93,7 +93,7 @@ errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
return 0;
}
i++;
- if (i >= fs->super->s_blocks_count)
+ if (i >= ext2fs_super_blocks_count(fs))
i = fs->super->s_first_data_block;
} while (i != goal);
return EXT2_ET_BLOCK_ALLOC_FAIL;
@@ -103,11 +103,11 @@ errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
* This function zeros out the allocated block, and updates all of the
* appropriate filesystem records.
*/
-errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
- char *block_buf, blk_t *ret)
+errcode_t ext2fs_alloc_block64(ext2_filsys fs, blk64_t goal,
+ char *block_buf, blk64_t *ret)
{
errcode_t retval;
- blk_t block;
+ blk64_t block;
char *buf = 0;
if (!block_buf) {
@@ -124,11 +124,11 @@ errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
goto fail;
}
- retval = ext2fs_new_block(fs, goal, 0, &block);
+ retval = ext2fs_new_block64(fs, goal, 0, &block);
if (retval)
goto fail;
- retval = io_channel_write_blk(fs->io, block, 1, block_buf);
+ retval = io_channel_write_blk64(fs->io, block, 1, block_buf);
if (retval)
goto fail;
@@ -141,10 +141,11 @@ fail:
return retval;
}
-errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, blk_t finish,
- int num, ext2fs_block_bitmap map, blk_t *ret)
+errcode_t ext2fs_get_free_blocks64(ext2_filsys fs, blk64_t start,
+ blk64_t finish, int num,
+ ext2fs_block_bitmap map, blk64_t *ret)
{
- blk_t b = start;
+ blk64_t b = start;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
@@ -159,7 +160,7 @@ errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, blk_t finish,
if (!num)
num = 1;
do {
- if (b+num-1 > fs->super->s_blocks_count)
+ if (b+num-1 > ext2fs_super_blocks_count(fs))
b = fs->super->s_first_data_block;
if (ext2fs_fast_test_block_bitmap_range(map, b, num)) {
*ret = b;
@@ -170,3 +171,42 @@ errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, blk_t finish,
return EXT2_ET_BLOCK_ALLOC_FAIL;
}
+errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, blk_t finish,
+ int num, ext2fs_block_bitmap map, blk_t *ret)
+{
+ blk64_t ret64 = 0;
+ errcode_t err;
+
+ err = ext2fs_get_free_blocks64(fs, start, finish, num, map, &ret64);
+
+ *ret = (blk_t)ret64;
+
+ return err;
+}
+
+errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
+ ext2fs_block_bitmap map, blk_t *ret)
+{
+ blk64_t ret64 = 0;
+ errcode_t err;
+
+ err = ext2fs_new_block64(fs, goal, map, &ret64);
+
+ *ret = (blk_t)ret64;
+
+ return err;
+}
+
+errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
+ char *block_buf, blk_t *ret)
+{
+ blk64_t ret64 = 0;
+ errcode_t err;
+
+ err = ext2fs_alloc_block64(fs, goal, block_buf, &ret64);
+
+ *ret = (blk_t)ret64;
+
+ return err;
+}
+
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index a60e28b..058dea7 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -1385,6 +1385,17 @@ _INLINE_ blk64_t ext2fs_inode_data_blocks64(ext2_filsys fs,
return ret;
}
+/*
+ * Return the s_blocks_count in 64 bit
+ */
+_INLINE_ blk64_t ext2fs_super_blocks_count(ext2_filsys fs)
+{
+ if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
+ return (((blk64_t)fs->super->s_blocks_count << 32) |
+ fs->super->s_blocks_count);
+ return fs->super->s_blocks_count;
+}
+
#undef _INLINE_
#endif
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists