summaryrefslogtreecommitdiff
path: root/ext2fs/getblk.c
diff options
context:
space:
mode:
Diffstat (limited to 'ext2fs/getblk.c')
-rw-r--r--ext2fs/getblk.c146
1 files changed, 68 insertions, 78 deletions
diff --git a/ext2fs/getblk.c b/ext2fs/getblk.c
index 8a4b44c4..23496183 100644
--- a/ext2fs/getblk.c
+++ b/ext2fs/getblk.c
@@ -60,14 +60,13 @@ ext2_discard_prealloc (struct node *node)
#endif
}
-static int
-ext2_alloc_block (struct node *node, unsigned long goal)
+static block_t
+ext2_alloc_block (struct node *node, block_t goal, int zero)
{
#ifdef EXT2FS_DEBUG
static unsigned long alloc_hits = 0, alloc_attempts = 0;
#endif
- unsigned long result;
- char *bh;
+ block_t result;
#ifdef EXT2_PREALLOCATE
if (node->dn->info.i_prealloc_count &&
@@ -76,11 +75,8 @@ ext2_alloc_block (struct node *node, unsigned long goal)
{
result = node->dn->info.i_prealloc_block++;
node->dn->info.i_prealloc_count--;
- ext2_debug ("preallocation hit (%lu/%lu)",
- ++alloc_hits, ++alloc_attempts);
-
- bh = bptr (result);
- memset (bh, 0, block_size);
+ ext2_debug ("preallocation hit (%lu/%lu) => %lu",
+ ++alloc_hits, ++alloc_attempts, result);
}
else
{
@@ -88,10 +84,10 @@ ext2_alloc_block (struct node *node, unsigned long goal)
alloc_hits, ++alloc_attempts);
ext2_discard_prealloc (node);
if (S_ISREG (node->dn_stat.st_mode))
- result = ext2_new_block
- (goal,
- &node->dn->info.i_prealloc_count,
- &node->dn->info.i_prealloc_block);
+ result =
+ ext2_new_block (goal,
+ &node->dn->info.i_prealloc_count,
+ &node->dn->info.i_prealloc_block);
else
result = ext2_new_block (goal, 0, 0);
}
@@ -99,25 +95,29 @@ ext2_alloc_block (struct node *node, unsigned long goal)
result = ext2_new_block (goal, 0, 0);
#endif
+ if (result && zero)
+ {
+ char *bh = bptr (result);
+ bzero (bh, block_size);
+ record_global_poke (bh);
+ }
+
return result;
}
static error_t
-inode_getblk (struct node *node, int nr, int create, int new_block, char **buf)
+inode_getblk (struct node *node, int nr, int create, int zero,
+ block_t new_block, block_t *result)
{
- u32 block;
- int goal = 0, i;
- int blocks = block_size / 512;
+ int i;
+ block_t goal = 0;
#ifdef EXT2FS_DEBUG
- int hint;
+ block_t hint;
#endif
- block = node->dn->info.i_data[nr];
- if (block)
- {
- *buf = bptr (block);
- return 0;
- }
+ *result = node->dn->info.i_data[nr];
+ if (*result)
+ return 0;
if (!create)
return EINVAL;
@@ -145,20 +145,20 @@ inode_getblk (struct node *node, int nr, int create, int new_block, char **buf)
+ sblock->s_first_data_block;
}
- ext2_debug ("%screate, hint = %d, goal = %d",
- create ? "" : "no", hint, goal);
+ *result = ext2_alloc_block (node, goal, zero);
- block = ext2_alloc_block (node, goal);
- if (!block)
+ ext2_debug ("%screate, hint = %lu, goal = %lu => %lu",
+ create ? "" : "no", hint, goal, *result);
+
+ if (!*result)
return EIO;
- *buf = bptr (block);
- node->dn->info.i_data[nr] = block;
+ node->dn->info.i_data[nr] = *result;
node->dn->info.i_next_alloc_block = new_block;
- node->dn->info.i_next_alloc_goal = block;
+ node->dn->info.i_next_alloc_goal = *result;
node->dn_set_ctime = 1;
- node->dn_stat.st_blocks += blocks << log2_stat_blocks_per_fs_block;
+ node->dn_stat.st_blocks += 1 << log2_stat_blocks_per_fs_block;
node->dn_stat_dirty = 1;
if (diskfs_synchronous || node->dn->info.i_osync)
@@ -168,21 +168,16 @@ inode_getblk (struct node *node, int nr, int create, int new_block, char **buf)
}
error_t
-block_getblk (struct node *node,
- char *bh, int nr,
- int create, int blocksize, int new_block,
- char **buf)
+block_getblk (struct node *node, block_t block, int nr, int create, int zero,
+ block_t new_block, block_t *result)
{
- int i, goal = 0;
- u32 block;
- int blocks = block_size / 512;
+ int i;
+ block_t goal = 0;
+ char *bh = bptr (block);
- block = ((u32 *)bh)[nr];
- if (block)
- {
- *buf = bptr (block);
- return 0;
- }
+ *result = ((u32 *)bh)[nr];
+ if (*result)
+ return 0;
if (!create)
return EINVAL;
@@ -200,15 +195,14 @@ block_getblk (struct node *node,
}
}
if (!goal)
- goal = bptr_block (bh);
+ goal = block;
}
- block = ext2_alloc_block (node, goal);
- if (!block)
+ *result = ext2_alloc_block (node, goal, zero);
+ if (!*result)
return EIO; /* XXX? */
- *buf = bptr (block);
- ((u32 *)bh)[nr] = block;
+ ((u32 *)bh)[nr] = *result;
if (diskfs_synchronous || node->dn->info.i_osync)
sync_global_ptr (bh, 1);
@@ -217,29 +211,24 @@ block_getblk (struct node *node,
node->dn_set_ctime = 1;
node->dn->info.i_next_alloc_block = new_block;
- node->dn->info.i_next_alloc_goal = block;
- node->dn_stat.st_blocks += blocks << log2_stat_blocks_per_fs_block;
+ node->dn->info.i_next_alloc_goal = *result;
+ node->dn_stat.st_blocks += 1 << log2_stat_blocks_per_fs_block;
node->dn_stat_dirty = 1;
return 0;
}
-/* Returns in BUF a pointer to the file block BLOCK in NODE. If there is no
- such block yet, but CREATE is true, then it is created, otherwise EINVAL
- is returned. */
+/* Returns in DISK_BLOCK the disk block correspding to BLOCK in NODE. If
+ there is no such block yet, but CREATE is true, then it is created,
+ otherwise EINVAL is returned. */
error_t
-ext2_getblk (struct node *node, long block, int create, char **buf)
+ext2_getblk (struct node *node, block_t block, int create, block_t *disk_block)
{
error_t err;
- char *bh;
- unsigned long b;
+ u32 indir;
+ block_t b;
unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK (sblock);
- if (block < 0)
- {
- ext2_warning ("ext2_getblk", "block < 0");
- return EIO;
- }
if (block > EXT2_NDIR_BLOCKS + addr_per_block +
addr_per_block * addr_per_block +
addr_per_block * addr_per_block * addr_per_block)
@@ -266,42 +255,43 @@ ext2_getblk (struct node *node, long block, int create, char **buf)
b = block;
if (block < EXT2_NDIR_BLOCKS)
- return inode_getblk (node, block, create, b, buf);
+ return inode_getblk (node, block, create, 0, b, disk_block);
block -= EXT2_NDIR_BLOCKS;
if (block < addr_per_block)
{
- err = inode_getblk (node, EXT2_IND_BLOCK, create, b, &bh);
+ err = inode_getblk (node, EXT2_IND_BLOCK, create, 1, b, &indir);
if (!err)
- err= block_getblk (node, bh, block, create, block_size, b, buf);
+ err = block_getblk (node, indir, block, create, 0, b, disk_block);
return err;
}
block -= addr_per_block;
if (block < addr_per_block * addr_per_block)
{
- err = inode_getblk (node, EXT2_DIND_BLOCK, create, b, &bh);
+ err = inode_getblk (node, EXT2_DIND_BLOCK, create, 1, b, &indir);
if (!err)
- err = block_getblk (node, bh, block / addr_per_block, create,
- block_size, b, &bh);
+ err = block_getblk (node, indir, block / addr_per_block, create, 1,
+ b, &indir);
if (!err)
- err = block_getblk (node, bh, block & (addr_per_block - 1),
- create, block_size, b, buf);
+ err = block_getblk (node, indir, block & (addr_per_block - 1),
+ create, 0, b, disk_block);
return err;
}
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, 1, b, &indir);
if (!err)
- err = block_getblk (node, bh, block / (addr_per_block * addr_per_block),
- create, block_size, b, &bh);
+ err = block_getblk (node, indir, block / (addr_per_block * addr_per_block),
+ create, 1, b, &indir);
if (!err)
err =
- block_getblk (node, bh, (block / addr_per_block) & (addr_per_block - 1),
- create, block_size, b, &bh);
+ block_getblk (node, indir,
+ (block / addr_per_block) & (addr_per_block - 1),
+ create, 1, b, &indir);
if (!err)
- err = block_getblk (node, bh, block & (addr_per_block - 1), create,
- block_size, b, buf);
+ err = block_getblk (node, indir, block & (addr_per_block - 1), create, 0,
+ b, disk_block);
return err;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 08:33:36 +0000