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Date: Mon, 07 Dec 2009 16:59:31 -0800
From: Mingming <cmm@...ibm.com>
To: Dmitry Monakhov <dmonakhov@...nvz.org>
Cc: linux-ext4@...r.kernel.org, Jan Kara <jack@...e.cz>
Subject: Re: [PATCH 3/4] ext4: quota macros cleanup
On Wed, 2009-11-25 at 09:57 +0300, Dmitry Monakhov wrote:
> Currently all quota block reservation macros contains hard-coded "2"
> aka MAXQUOTAS value. This is no good because in some places it is not
> obvious to understand what does this digit represent. Let's introduce
> new macro with self descriptive name.
>
> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
looks sane, MAXQUOTAS is either user or group quota.
Acked-by: Mingming Cao <cmm@...ibm.com>
> ---
> fs/ext4/ext4_jbd2.h | 8 ++++++--
> fs/ext4/extents.c | 2 +-
> fs/ext4/inode.c | 2 +-
> fs/ext4/migrate.c | 4 ++--
> fs/ext4/namei.c | 8 ++++----
> 5 files changed, 14 insertions(+), 10 deletions(-)
>
> diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
> index a286598..404ab6c 100644
> --- a/fs/ext4/ext4_jbd2.h
> +++ b/fs/ext4/ext4_jbd2.h
> @@ -49,7 +49,7 @@
>
> #define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \
> EXT4_XATTR_TRANS_BLOCKS - 2 + \
> - 2*EXT4_QUOTA_TRANS_BLOCKS(sb))
> + EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
>
> /*
> * Define the number of metadata blocks we need to account to modify data.
> @@ -57,7 +57,7 @@
> * This include super block, inode block, quota blocks and xattr blocks
> */
> #define EXT4_META_TRANS_BLOCKS(sb) (EXT4_XATTR_TRANS_BLOCKS + \
> - 2*EXT4_QUOTA_TRANS_BLOCKS(sb))
> + EXT4_MAXQUOTAS_TRANS_BLOCKS(sb))
>
> /* Delete operations potentially hit one directory's namespace plus an
> * entire inode, plus arbitrary amounts of bitmap/indirection data. Be
> @@ -92,6 +92,7 @@
> * but inode, sb and group updates are done only once */
> #define EXT4_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
> (EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_INIT_REWRITE) : 0)
> +
> #define EXT4_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
> (EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_DEL_REWRITE) : 0)
> #else
> @@ -99,6 +100,9 @@
> #define EXT4_QUOTA_INIT_BLOCKS(sb) 0
> #define EXT4_QUOTA_DEL_BLOCKS(sb) 0
> #endif
> +#define EXT4_MAXQUOTAS_TRANS_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_TRANS_BLOCKS(sb))
> +#define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb))
> +#define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb))
>
> int
> ext4_mark_iloc_dirty(handle_t *handle,
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index 715264b..f73c3ff 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -2167,7 +2167,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
> correct_index = 1;
> credits += (ext_depth(inode)) + 1;
> }
> - credits += 2 * EXT4_QUOTA_TRANS_BLOCKS(inode->i_sb);
> + credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);
>
> err = ext4_ext_truncate_extend_restart(handle, inode, credits);
> if (err)
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 979362d..211722b 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -5438,7 +5438,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
>
> /* (user+group)*(old+new) structure, inode write (sb,
> * inode block, ? - but truncate inode update has it) */
> - handle = ext4_journal_start(inode, 2*(EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)+
> + handle = ext4_journal_start(inode, (EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)+
> EXT4_QUOTA_DEL_BLOCKS(inode->i_sb))+3);
> if (IS_ERR(handle)) {
> error = PTR_ERR(handle);
> diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
> index a93d5b8..8646149 100644
> --- a/fs/ext4/migrate.c
> +++ b/fs/ext4/migrate.c
> @@ -238,7 +238,7 @@ static int extend_credit_for_blkdel(handle_t *handle, struct inode *inode)
> * So allocate a credit of 3. We may update
> * quota (user and group).
> */
> - needed = 3 + 2*EXT4_QUOTA_TRANS_BLOCKS(inode->i_sb);
> + needed = 3 + EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);
>
> if (ext4_journal_extend(handle, needed) != 0)
> retval = ext4_journal_restart(handle, needed);
> @@ -477,7 +477,7 @@ int ext4_ext_migrate(struct inode *inode)
> handle = ext4_journal_start(inode,
> EXT4_DATA_TRANS_BLOCKS(inode->i_sb) +
> EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
> - 2 * EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)
> + EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)
> + 1);
> if (IS_ERR(handle)) {
> retval = PTR_ERR(handle);
> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
> index fde08c9..17a17e1 100644
> --- a/fs/ext4/namei.c
> +++ b/fs/ext4/namei.c
> @@ -1769,7 +1769,7 @@ static int ext4_create(struct inode *dir, struct dentry *dentry, int mode,
> retry:
> handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
> EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
> - 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
> + EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
> if (IS_ERR(handle))
> return PTR_ERR(handle);
>
> @@ -1803,7 +1803,7 @@ static int ext4_mknod(struct inode *dir, struct dentry *dentry,
> retry:
> handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
> EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
> - 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
> + EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
> if (IS_ERR(handle))
> return PTR_ERR(handle);
>
> @@ -1840,7 +1840,7 @@ static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
> retry:
> handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
> EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
> - 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
> + EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
> if (IS_ERR(handle))
> return PTR_ERR(handle);
>
> @@ -2253,7 +2253,7 @@ static int ext4_symlink(struct inode *dir,
> retry:
> handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
> EXT4_INDEX_EXTRA_TRANS_BLOCKS + 5 +
> - 2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
> + EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
> if (IS_ERR(handle))
> return PTR_ERR(handle);
>
--
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