From: "Theodore Ts'o" <tytso@mit.edu>
To: Ext4 Developers List <linux-ext4@vger.kernel.org>,
Linux Kernel Developers List <linux-kernel@vger.kernel.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Mingming Cao <cmm@us.ibm.com>, "Theodore Ts'o" <tytso@mit.edu>
Subject: [PATCH 25/52] ext4: cleanup block allocator
Date: Sat, 5 Jul 2008 13:35:51 -0400 [thread overview]
Message-ID: <1215279378-30504-26-git-send-email-tytso@mit.edu> (raw)
In-Reply-To: <1215279378-30504-25-git-send-email-tytso@mit.edu>
From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Move the code related to block allocation to a single function and add helper
funtions to differient allocation for data and meta data blocks
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/balloc.c | 127 +++++++++++++++++++++++++++++++----------------------
fs/ext4/ext4.h | 2 +-
fs/ext4/extents.c | 10 +++-
fs/ext4/inode.c | 2 +-
fs/ext4/mballoc.c | 2 +-
5 files changed, 84 insertions(+), 59 deletions(-)
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 816f1db..48787e8 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1640,20 +1640,24 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
}
/**
- * ext4_new_blocks_old() -- core block(s) allocation function
+ * ext4_old_new_blocks() -- core block bitmap based block allocation function
+ *
* @handle: handle to this transaction
* @inode: file inode
* @goal: given target block(filesystem wide)
* @count: target number of blocks to allocate
* @errp: error code
*
- * ext4_new_blocks uses a goal block to assist allocation. It tries to
- * allocate block(s) from the block group contains the goal block first. If that
- * fails, it will try to allocate block(s) from other block groups without
- * any specific goal block.
+ * ext4_old_new_blocks uses a goal block to assist allocation and look up
+ * the block bitmap directly to do block allocation. It tries to
+ * allocate block(s) from the block group contains the goal block first. If
+ * that fails, it will try to allocate block(s) from other block groups
+ * without any specific goal block.
+ *
+ * This function is called when -o nomballoc mount option is enabled
*
*/
-ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
+ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, unsigned long *count, int *errp)
{
struct buffer_head *bitmap_bh = NULL;
@@ -1923,78 +1927,95 @@ out:
return 0;
}
-ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode,
- ext4_fsblk_t goal, int *errp)
-{
- struct ext4_allocation_request ar;
- ext4_fsblk_t ret;
-
- if (!test_opt(inode->i_sb, MBALLOC)) {
- unsigned long count = 1;
- ret = ext4_new_blocks_old(handle, inode, goal, &count, errp);
- return ret;
- }
+#define EXT4_META_BLOCK 0x1
- memset(&ar, 0, sizeof(ar));
- ar.inode = inode;
- ar.goal = goal;
- ar.len = 1;
- ret = ext4_mb_new_blocks(handle, &ar, errp);
- return ret;
-}
-ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
- ext4_fsblk_t goal, unsigned long *count, int *errp)
-{
- struct ext4_allocation_request ar;
- ext4_fsblk_t ret;
-
- if (!test_opt(inode->i_sb, MBALLOC)) {
- ret = ext4_new_blocks_old(handle, inode, goal, count, errp);
- return ret;
- }
-
- memset(&ar, 0, sizeof(ar));
- ar.inode = inode;
- ar.goal = goal;
- ar.len = *count;
- ret = ext4_mb_new_blocks(handle, &ar, errp);
- *count = ar.len;
- return ret;
-}
-
-ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
+static ext4_fsblk_t do_blk_alloc(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, ext4_fsblk_t goal,
- unsigned long *count, int *errp)
+ unsigned long *count, int *errp, int flags)
{
struct ext4_allocation_request ar;
ext4_fsblk_t ret;
if (!test_opt(inode->i_sb, MBALLOC)) {
- ret = ext4_new_blocks_old(handle, inode, goal, count, errp);
- return ret;
+ return ext4_old_new_blocks(handle, inode, goal, count, errp);
}
memset(&ar, 0, sizeof(ar));
/* Fill with neighbour allocated blocks */
- ar.lleft = 0;
- ar.pleft = 0;
- ar.lright = 0;
- ar.pright = 0;
ar.inode = inode;
ar.goal = goal;
ar.len = *count;
ar.logical = iblock;
- if (S_ISREG(inode->i_mode))
+
+ if (S_ISREG(inode->i_mode) && !(flags & EXT4_META_BLOCK))
+ /* enable in-core preallocation for data block allocation */
ar.flags = EXT4_MB_HINT_DATA;
else
/* disable in-core preallocation for non-regular files */
ar.flags = 0;
+
ret = ext4_mb_new_blocks(handle, &ar, errp);
*count = ar.len;
return ret;
}
+/*
+ * ext4_new_meta_block() -- allocate block for meta data (indexing) blocks
+ *
+ * @handle: handle to this transaction
+ * @inode: file inode
+ * @goal: given target block(filesystem wide)
+ * @errp: error code
+ *
+ * Return allocated block number on success
+ */
+ext4_fsblk_t ext4_new_meta_block(handle_t *handle, struct inode *inode,
+ ext4_fsblk_t goal, int *errp)
+{
+ unsigned long count = 1;
+ return do_blk_alloc(handle, inode, 0, goal,
+ &count, errp, EXT4_META_BLOCK);
+}
+
+/*
+ * ext4_new_meta_blocks() -- allocate block for meta data (indexing) blocks
+ *
+ * @handle: handle to this transaction
+ * @inode: file inode
+ * @goal: given target block(filesystem wide)
+ * @count: total number of blocks need
+ * @errp: error code
+ *
+ * Return 1st allocated block numberon success, *count stores total account
+ * error stores in errp pointer
+ */
+ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
+ ext4_fsblk_t goal, unsigned long *count, int *errp)
+{
+ return do_blk_alloc(handle, inode, 0, goal,
+ count, errp, EXT4_META_BLOCK);
+}
+
+/*
+ * ext4_new_blocks() -- allocate data blocks
+ *
+ * @handle: handle to this transaction
+ * @inode: file inode
+ * @goal: given target block(filesystem wide)
+ * @count: total number of blocks need
+ * @errp: error code
+ *
+ * Return 1st allocated block numberon success, *count stores total account
+ * error stores in errp pointer
+ */
+
+ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
+ ext4_lblk_t iblock, ext4_fsblk_t goal,
+ unsigned long *count, int *errp)
+{
+ return do_blk_alloc(handle, inode, iblock, goal, count, errp, 0);
+}
/**
* ext4_count_free_blocks() -- count filesystem free blocks
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index b3e62b7..ed04642 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -977,7 +977,7 @@ extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
extern ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock, ext4_fsblk_t goal,
unsigned long *count, int *errp);
-extern ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
+extern ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, unsigned long *count, int *errp);
extern void ext4_free_blocks (handle_t *handle, struct inode *inode,
ext4_fsblk_t block, unsigned long count, int metadata);
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index c729b35..555155d 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -179,8 +179,11 @@ static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
return bg_start + colour + block;
}
+/*
+ * Allocation for a meta data block
+ */
static ext4_fsblk_t
-ext4_ext_new_block(handle_t *handle, struct inode *inode,
+ext4_ext_new_meta_block(handle_t *handle, struct inode *inode,
struct ext4_ext_path *path,
struct ext4_extent *ex, int *err)
{
@@ -690,7 +693,8 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
/* allocate all needed blocks */
ext_debug("allocate %d blocks for indexes/leaf\n", depth - at);
for (a = 0; a < depth - at; a++) {
- newblock = ext4_ext_new_block(handle, inode, path, newext, &err);
+ newblock = ext4_ext_new_meta_block(handle, inode, path,
+ newext, &err);
if (newblock == 0)
goto cleanup;
ablocks[a] = newblock;
@@ -886,7 +890,7 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
ext4_fsblk_t newblock;
int err = 0;
- newblock = ext4_ext_new_block(handle, inode, path, newext, &err);
+ newblock = ext4_ext_new_meta_block(handle, inode, path, newext, &err);
if (newblock == 0)
return err;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 04059ba..884cf89 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -561,7 +561,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
goto allocated;
/* Now allocate data blocks */
count = target;
- /* allocating blocks for indirect blocks and direct blocks */
+ /* allocating blocks for data blocks */
current_block = ext4_new_blocks(handle, inode, iblock,
goal, &count, err);
if (*err && (target == blks)) {
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8b67414..007b97b 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4035,7 +4035,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
sbi = EXT4_SB(sb);
if (!test_opt(sb, MBALLOC)) {
- block = ext4_new_blocks_old(handle, ar->inode, ar->goal,
+ block = ext4_old_new_blocks(handle, ar->inode, ar->goal,
&(ar->len), errp);
return block;
}
--
1.5.6.rc3.1.g36b7.dirty
next prev parent reply other threads:[~2008-07-05 17:46 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-05 17:35 Ext4 patches for the next merge window Theodore Ts'o
2008-07-05 17:35 ` [PATCH 01/52] ext4: fix comments to say "ext4" Theodore Ts'o
2008-07-05 17:35 ` [PATCH 02/52] ext4: start searching for the right extent from the goal group Theodore Ts'o
2008-07-05 17:35 ` [PATCH 03/52] ext4: Use BUG_ON() instead of BUG() Theodore Ts'o
2008-07-05 17:35 ` [PATCH 04/52] ext4: switch to seq_files Theodore Ts'o
2008-07-05 17:35 ` [PATCH 05/52] ext4: improve some code in rb tree part of dir.c Theodore Ts'o
2008-07-05 17:35 ` [PATCH 06/52] ext4: Fix ext4_mb_init_cache return error Theodore Ts'o
2008-07-05 17:35 ` [PATCH 07/52] ext4: add error processing when calling ext4_mb_init_cache in mballoc Theodore Ts'o
2008-07-05 17:35 ` [PATCH 08/52] ext4: miscellaneous error checks and coding cleanups for mballoc Theodore Ts'o
2008-07-05 17:35 ` [PATCH 09/52] ext4: remove double definitions of xattr macros Theodore Ts'o
2008-07-05 17:35 ` [PATCH 10/52] ext4: Rename read_block_bitmap() to ext4_read_block_bitmap() Theodore Ts'o
2008-07-05 17:35 ` [PATCH 11/52] ext4: Remove unused variable from ext4_show_options Theodore Ts'o
2008-07-05 17:35 ` [PATCH 12/52] jbd2: Add commit time into the commit block Theodore Ts'o
2008-07-05 17:35 ` [PATCH 13/52] ext4: New inode allocation for FLEX_BG meta-data groups Theodore Ts'o
2008-07-05 17:35 ` [PATCH 14/52] jbd2: fix race between jbd2_journal_try_to_free_buffers() and jbd2 commit transaction Theodore Ts'o
2008-07-05 17:35 ` [PATCH 15/52] ext4: remove redundant code in ext4_fill_super() Theodore Ts'o
2008-07-05 17:35 ` [PATCH 16/52] ext4: remove quota allocation when ext4_mb_new_blocks fails Theodore Ts'o
2008-07-05 17:35 ` [PATCH 17/52] ext4: Update i_disksize properly when allocating from fallocate area Theodore Ts'o
2008-07-05 17:35 ` [PATCH 18/52] ext4: return error when calling ext4_ext_split failed Theodore Ts'o
2008-07-05 17:35 ` [PATCH 19/52] ext4: Make ext4_ext_find_extent fills ext_path completely Theodore Ts'o
2008-07-05 17:35 ` [PATCH 20/52] ext4: Fix ext4_ext_journal_restart() to reflect errors up to the caller Theodore Ts'o
2008-07-05 17:35 ` [PATCH 21/52] ext4: cleanup never-used magic numbers from htree code Theodore Ts'o
2008-07-05 17:35 ` [PATCH 22/52] ext4: Fix sparse warning Theodore Ts'o
2008-07-05 17:35 ` [PATCH 23/52] ext4: fix ext4_init_block_bitmap() for metablock block group Theodore Ts'o
2008-07-05 17:35 ` [PATCH 24/52] ext4: Use inode preallocation with -o noextents Theodore Ts'o
2008-07-05 17:35 ` Theodore Ts'o [this message]
2008-07-05 17:35 ` [PATCH 26/52] ext4: call blkdev_issue_flush on fsync Theodore Ts'o
2008-07-05 17:35 ` [PATCH 27/52] ext4: mballoc avoid use root reserved blocks for non root allocation Theodore Ts'o
2008-07-05 17:35 ` [PATCH 28/52] ext4: Set journal pointer to NULL when journal is released Theodore Ts'o
2008-07-05 17:35 ` [PATCH 29/52] ext4: use atomic functions to set bh_state Theodore Ts'o
2008-07-05 17:35 ` [PATCH 30/52] ext4: Add missing unlock to an error path in ext4_quota_write() Theodore Ts'o
2008-07-05 17:35 ` [PATCH 31/52] ext4: fix online resize with mballoc Theodore Ts'o
2008-07-05 17:35 ` [PATCH 32/52] ext4: Documentation updates Theodore Ts'o
2008-07-05 17:35 ` [PATCH 33/52] ext4: Use page_mkwrite vma_operations to get mmap write notification Theodore Ts'o
2008-07-05 17:36 ` [PATCH 34/52] vfs: Move mark_inode_dirty() from under page lock in generic_write_end() Theodore Ts'o
2008-07-05 17:36 ` [PATCH 35/52] ext4: Invert the locking order of page_lock and transaction start Theodore Ts'o
2008-07-05 17:36 ` [PATCH 36/52] ext4: Fix lock inversion in ext4_ext_truncate() Theodore Ts'o
2008-07-05 17:36 ` [PATCH 37/52] vfs: export filemap_fdatawrite_range() Theodore Ts'o
2008-07-05 17:36 ` [PATCH 38/52] jbd2: Implement data=ordered mode handling via inodes Theodore Ts'o
2008-07-05 17:36 ` [PATCH 39/52] ext4: Use new framework for data=ordered mode in JBD2 Theodore Ts'o
2008-07-05 17:36 ` [PATCH 40/52] jbd2: Remove data=ordered mode support using jbd buffer heads Theodore Ts'o
2008-07-05 17:36 ` [PATCH 41/52] vfs: add basic delayed allocation support Theodore Ts'o
2008-07-05 17:36 ` [PATCH 42/52] ext4: Add " Theodore Ts'o
2008-07-05 17:36 ` [PATCH 43/52] percpu_counter: new function percpu_counter_sum_and_set Theodore Ts'o
2008-07-05 17:36 ` [PATCH 44/52] ext4: delayed allocation ENOSPC handling Theodore Ts'o
2008-07-05 17:36 ` [PATCH 45/52] mm: Add range_cont mode for writeback Theodore Ts'o
2008-07-05 17:36 ` [PATCH 46/52] ext4: Invert lock ordering of page_lock and transaction start in delalloc Theodore Ts'o
2008-07-05 17:36 ` [PATCH 47/52] ext4: Add ordered mode support for delalloc Theodore Ts'o
2008-07-05 17:36 ` [PATCH 48/52] ext4: Handle page without buffers in ext4_*_writepage() Theodore Ts'o
2008-07-05 17:36 ` [PATCH 49/52] ext4: fix delalloc i_disksize early update issue Theodore Ts'o
2008-07-05 17:36 ` [PATCH 50/52] ext4: Enable delalloc by default Theodore Ts'o
2008-07-05 17:36 ` [PATCH 51/52] ext4: Don't allow nonextenst mount option for large filesystem Theodore Ts'o
2008-07-05 17:36 ` [PATCH 52/52] ext4: Documention update for new ordered mode and delayed allocation Theodore Ts'o
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