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-rw-r--r--ext2fs/getblk.c140
1 files changed, 71 insertions, 69 deletions
diff --git a/ext2fs/getblk.c b/ext2fs/getblk.c
index 1f3ec58b..8f10e291 100644
--- a/ext2fs/getblk.c
+++ b/ext2fs/getblk.c
@@ -1,5 +1,25 @@
+/* File block to disk block mapping routines.
+
+ Copyright (C) 1995 Free Software Foundation, Inc.
+
+ Converted to work under the hurd by Miles Bader <miles@gnu.ai.mit.edu>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
/*
- * Largely stolen from: linux/fs/ext2/inode.c
+ * linux/fs/ext2/inode.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
@@ -15,6 +35,9 @@
* Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
*/
+#include <string.h>
+#include "ext2fs.h"
+
/*
* ext2_discard_prealloc and ext2_alloc_block are atomic wrt. the
* superblock in the same manner as are ext2_free_blocks and
@@ -62,7 +85,7 @@ ext2_alloc_block (struct node *node, unsigned long goal)
ext2_discard_prealloc (node);
ext2_debug ("preallocation miss (%lu/%lu).\n",
alloc_hits, ++alloc_attempts);
- if (S_ISREG (node->dn_stat.mode))
+ if (S_ISREG (node->dn_stat.st_mode))
result = ext2_new_block
(goal,
&node->dn->info.i_prealloc_count,
@@ -78,29 +101,21 @@ ext2_alloc_block (struct node *node, unsigned long goal)
}
static error_t
-inode_getblk (struct node *node, int nr,
- int create, int new_block, int *buf)
+inode_getblk (struct node *node, int nr, int create, int new_block, char **buf)
{
- u32 *p;
- int tmp, goal = 0;
+ u32 block;
+ int goal = 0, i;
int blocks = block_size / 512;
- p = node->dn->info.i_data + nr;
-
-repeat:
- tmp = *p;
- if (tmp)
+ block = node->dn->info.i_data[nr];
+ if (block)
{
- *buf = baddr(tmp);
- if (tmp == *p)
- return 0;
- goto repeat;
+ *buf = baddr(block);
+ return 0;
}
- if (!create || new_block >=
- (current->rlim[RLIMIT_FSIZE].rlim_cur >>
- EXT2_BLOCK_SIZE_BITS (sblock)))
- return EFBIG;
+ if (!create)
+ return EINVAL;
if (node->dn->info.i_next_alloc_block == new_block)
goal = node->dn->info.i_next_alloc_goal;
@@ -109,11 +124,11 @@ repeat:
if (!goal)
{
- for (tmp = nr - 1; tmp >= 0; tmp--)
+ for (i = nr - 1; i >= 0; i--)
{
- if (node->dn->info.i_data[tmp])
+ if (node->dn->info.i_data[i])
{
- goal = node->dn->info.i_data[tmp];
+ goal = node->dn->info.i_data[i];
break;
}
}
@@ -125,27 +140,21 @@ repeat:
ext2_debug ("goal = %d.\n", goal);
- tmp = ext2_alloc_block (node, goal);
- if (!tmp)
+ block = ext2_alloc_block (node, goal);
+ if (!block)
return EIO;
- *buf = baddr(tmp);
- if (*p)
- {
- ext2_free_blocks (tmp, 1);
- goto repeat;
- }
+ *buf = baddr(block);
+ node->dn->info.i_data[nr] = block;
- *p = tmp;
node->dn->info.i_next_alloc_block = new_block;
- node->dn->info.i_next_alloc_goal = tmp;
+ node->dn->info.i_next_alloc_goal = block;
node->dn_set_ctime = 1;
node->dn_stat.st_blocks += blocks;
+ node->dn_stat_dirty = 1;
if (diskfs_synchronous || node->dn->info.i_osync)
- ext2_sync_node (node);
- else
- node->dirty = 1;
+ diskfs_node_update (node, 1);
return 0;
}
@@ -154,62 +163,53 @@ error_t
block_getblk (struct node *node,
char *bh, int nr,
int create, int blocksize,
- int new_block, int **buf)
+ int new_block, char **buf)
{
- int tmp, goal = 0;
- u32 *p;
- char *result;
+ int i, goal = 0;
+ u32 block;
int blocks = block_size / 512;
- p = (u32 *) bh + nr;
-
-repeat:
- tmp = *p;
- if (tmp)
+ block = ((u32 *)bh)[nr];
+ if (block)
{
- *buf = baddr (tmp);
- if (tmp == *p)
- return 0;
- goto repeat;
+ *buf = baddr (block);
+ return 0;
}
- if (!create || new_block >=
- (current->rlim[RLIMIT_FSIZE].rlim_cur >> EXT2_BLOCK_SIZE_BITS (sblock)))
- return EFBIG;
+
+ if (!create)
+ return EINVAL;
+
if (node->dn->info.i_next_alloc_block == new_block)
goal = node->dn->info.i_next_alloc_goal;
if (!goal)
{
- for (tmp = nr - 1; tmp >= 0; tmp--)
+ for (i = nr - 1; i >= 0; i--)
{
- if (((u32 *) bh)[tmp])
+ if (((u32 *) bh)[i])
{
- goal = ((u32 *) bh)[tmp];
+ goal = ((u32 *) bh)[i];
break;
}
}
if (!goal)
- goal = bh->b_blocknr;
+ goal = addrb(bh);
}
- tmp = ext2_alloc_block (node, goal);
- if (!tmp)
+
+ block = ext2_alloc_block (node, goal);
+ if (!block)
return EIO; /* XXX? */
- *buf = baddr (tmp);
- if (*p)
- {
- ext2_free_blocks (tmp, 1);
- goto repeat;
- }
- *p = tmp;
+ *buf = baddr (block);
+ ((u32 *)bh)[nr] = block;
if (diskfs_synchronous || node->dn->info.i_osync)
- sync_disk_image (bh, block_size);
+ sync_disk_image (bh, block_size, 1);
node->dn_set_ctime = 1;
- node->dn_stat.st_blocks += blocks;
- node->dirty = 1;
node->dn->info.i_next_alloc_block = new_block;
- node->dn->info.i_next_alloc_goal = tmp;
+ node->dn->info.i_next_alloc_goal = block;
+ node->dn_stat.st_blocks += blocks;
+ node->dn_stat_dirty = 1;
return 0;
}
@@ -217,6 +217,7 @@ repeat:
error_t
ext2_getblk (struct node *node, long block, int create, char **buf)
{
+ error_t err;
char *bh;
unsigned long b;
unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK (sblock);
@@ -277,7 +278,7 @@ ext2_getblk (struct node *node, long block, int create, char **buf)
}
block -= addr_per_block * addr_per_block;
- err = inode_getblk (node, EXT2_TIND_BLOCK, create, b, bh);
+ err = inode_getblk (node, EXT2_TIND_BLOCK, create, b, &bh);
if (!err)
err = block_getblk (node, bh, block / (addr_per_block * addr_per_block),
create, block_size, b, &bh);
@@ -288,5 +289,6 @@ ext2_getblk (struct node *node, long block, int create, char **buf)
if (!err)
err = block_getblk (node, bh, block & (addr_per_block - 1), create,
block_size, b, buf);
+
return err;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 11:00:18 +0000