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Date: Mon, 22 Dec 2008 13:47:54 -0800
From: Mark Fasheh <mfasheh@...e.com>
To: linux-kernel@...r.kernel.org
Cc: ocfs2-devel@....oracle.com, Joel Becker <joel.becker@...cle.com>,
Jan Kara <jack@...e.cz>, Mark Fasheh <mfasheh@...e.com>
Subject: [PATCH 13/56] quota: Convert union in mem_dqinfo to a pointer
From: Jan Kara <jack@...e.cz>
Coming quota support for OCFS2 is going to need quite a bit
of additional per-sb quota information. Moreover having fs.h
include all the types needed for this structure would be a
pain in the a**. So remove the union from mem_dqinfo and add
a private pointer for filesystem's use.
Signed-off-by: Jan Kara <jack@...e.cz>
Signed-off-by: Mark Fasheh <mfasheh@...e.com>
---
fs/quota_v2.c | 53 +++++++++++++++++++++++++++++----------------
include/linux/dqblk_v1.h | 4 ---
include/linux/dqblk_v2.h | 4 ---
include/linux/quota.h | 5 +---
4 files changed, 35 insertions(+), 31 deletions(-)
diff --git a/fs/quota_v2.c b/fs/quota_v2.c
index a87f102..b618b56 100644
--- a/fs/quota_v2.c
+++ b/fs/quota_v2.c
@@ -71,6 +71,7 @@ static int v2_read_file_info(struct super_block *sb, int type)
{
struct v2_disk_dqinfo dinfo;
struct mem_dqinfo *info = sb_dqinfo(sb, type);
+ struct qtree_mem_dqinfo *qinfo;
ssize_t size;
size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
@@ -80,22 +81,29 @@ static int v2_read_file_info(struct super_block *sb, int type)
sb->s_id);
return -1;
}
+ info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS);
+ if (!info->dqi_priv) {
+ printk(KERN_WARNING
+ "Not enough memory for quota information structure.\n");
+ return -1;
+ }
+ qinfo = info->dqi_priv;
/* limits are stored as unsigned 32-bit data */
info->dqi_maxblimit = 0xffffffff;
info->dqi_maxilimit = 0xffffffff;
info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
info->dqi_flags = le32_to_cpu(dinfo.dqi_flags);
- info->u.v2_i.i.dqi_sb = sb;
- info->u.v2_i.i.dqi_type = type;
- info->u.v2_i.i.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
- info->u.v2_i.i.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
- info->u.v2_i.i.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
- info->u.v2_i.i.dqi_blocksize_bits = V2_DQBLKSIZE_BITS;
- info->u.v2_i.i.dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS;
- info->u.v2_i.i.dqi_qtree_depth = qtree_depth(&info->u.v2_i.i);
- info->u.v2_i.i.dqi_entry_size = sizeof(struct v2_disk_dqblk);
- info->u.v2_i.i.dqi_ops = &v2_qtree_ops;
+ qinfo->dqi_sb = sb;
+ qinfo->dqi_type = type;
+ qinfo->dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
+ qinfo->dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
+ qinfo->dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
+ qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS;
+ qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS;
+ qinfo->dqi_qtree_depth = qtree_depth(qinfo);
+ qinfo->dqi_entry_size = sizeof(struct v2_disk_dqblk);
+ qinfo->dqi_ops = &v2_qtree_ops;
return 0;
}
@@ -104,6 +112,7 @@ static int v2_write_file_info(struct super_block *sb, int type)
{
struct v2_disk_dqinfo dinfo;
struct mem_dqinfo *info = sb_dqinfo(sb, type);
+ struct qtree_mem_dqinfo *qinfo = info->dqi_priv;
ssize_t size;
spin_lock(&dq_data_lock);
@@ -112,9 +121,9 @@ static int v2_write_file_info(struct super_block *sb, int type)
dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
dinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
spin_unlock(&dq_data_lock);
- dinfo.dqi_blocks = cpu_to_le32(info->u.v2_i.i.dqi_blocks);
- dinfo.dqi_free_blk = cpu_to_le32(info->u.v2_i.i.dqi_free_blk);
- dinfo.dqi_free_entry = cpu_to_le32(info->u.v2_i.i.dqi_free_entry);
+ dinfo.dqi_blocks = cpu_to_le32(qinfo->dqi_blocks);
+ dinfo.dqi_free_blk = cpu_to_le32(qinfo->dqi_free_blk);
+ dinfo.dqi_free_entry = cpu_to_le32(qinfo->dqi_free_entry);
size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
if (size != sizeof(struct v2_disk_dqinfo)) {
@@ -150,7 +159,7 @@ static void v2_mem2diskdqb(void *dp, struct dquot *dquot)
struct v2_disk_dqblk *d = dp;
struct mem_dqblk *m = &dquot->dq_dqb;
struct qtree_mem_dqinfo *info =
- &sb_dqinfo(dquot->dq_sb, dquot->dq_type)->u.v2_i.i;
+ sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
@@ -169,7 +178,7 @@ static int v2_is_id(void *dp, struct dquot *dquot)
{
struct v2_disk_dqblk *d = dp;
struct qtree_mem_dqinfo *info =
- &sb_dqinfo(dquot->dq_sb, dquot->dq_type)->u.v2_i.i;
+ sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
if (qtree_entry_unused(info, dp))
return 0;
@@ -178,24 +187,30 @@ static int v2_is_id(void *dp, struct dquot *dquot)
static int v2_read_dquot(struct dquot *dquot)
{
- return qtree_read_dquot(&sb_dqinfo(dquot->dq_sb, dquot->dq_type)->u.v2_i.i, dquot);
+ return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}
static int v2_write_dquot(struct dquot *dquot)
{
- return qtree_write_dquot(&sb_dqinfo(dquot->dq_sb, dquot->dq_type)->u.v2_i.i, dquot);
+ return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}
static int v2_release_dquot(struct dquot *dquot)
{
- return qtree_release_dquot(&sb_dqinfo(dquot->dq_sb, dquot->dq_type)->u.v2_i.i, dquot);
+ return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
+}
+
+static int v2_free_file_info(struct super_block *sb, int type)
+{
+ kfree(sb_dqinfo(sb, type)->dqi_priv);
+ return 0;
}
static struct quota_format_ops v2_format_ops = {
.check_quota_file = v2_check_quota_file,
.read_file_info = v2_read_file_info,
.write_file_info = v2_write_file_info,
- .free_file_info = NULL,
+ .free_file_info = v2_free_file_info,
.read_dqblk = v2_read_dquot,
.commit_dqblk = v2_write_dquot,
.release_dqblk = v2_release_dquot,
diff --git a/include/linux/dqblk_v1.h b/include/linux/dqblk_v1.h
index 57f1250..9cea901 100644
--- a/include/linux/dqblk_v1.h
+++ b/include/linux/dqblk_v1.h
@@ -17,8 +17,4 @@
#define V1_DEL_ALLOC 0
#define V1_DEL_REWRITE 2
-/* Special information about quotafile */
-struct v1_mem_dqinfo {
-};
-
#endif /* _LINUX_DQBLK_V1_H */
diff --git a/include/linux/dqblk_v2.h b/include/linux/dqblk_v2.h
index e5e22a7..ff8af1b 100644
--- a/include/linux/dqblk_v2.h
+++ b/include/linux/dqblk_v2.h
@@ -16,8 +16,4 @@
#define V2_DEL_ALLOC QTREE_DEL_ALLOC
#define V2_DEL_REWRITE QTREE_DEL_REWRITE
-struct v2_mem_dqinfo {
- struct qtree_mem_dqinfo i;
-};
-
#endif /* _LINUX_DQBLK_V2_H */
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 80b8807..e51dfdc 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -208,10 +208,7 @@ struct mem_dqinfo {
unsigned int dqi_igrace;
qsize_t dqi_maxblimit;
qsize_t dqi_maxilimit;
- union {
- struct v1_mem_dqinfo v1_i;
- struct v2_mem_dqinfo v2_i;
- } u;
+ void *dqi_priv;
};
struct super_block;
--
1.5.6
--
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