aboutsummaryrefslogtreecommitdiff
path: root/fs/quota_v2.c
diff options
context:
space:
mode:
authorJan Kara <jack@suse.cz>2009-01-26 15:28:09 +0100
committerJan Kara <jack@suse.cz>2009-03-26 02:18:35 +0100
commit884d179dff3aa98a73c3ba9dee05fd6050d664f0 (patch)
tree68c18e3ff8decd2af861e807bed96cca2dea30d4 /fs/quota_v2.c
parent60e58e0f30e723464c2a7d34b71b8675566c572d (diff)
quota: Move quota files into separate directory
Quota subsystem has more and more files. It's time to create a dir for it. Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota_v2.c')
-rw-r--r--fs/quota_v2.c236
1 files changed, 0 insertions, 236 deletions
diff --git a/fs/quota_v2.c b/fs/quota_v2.c
deleted file mode 100644
index b618b563635..00000000000
--- a/fs/quota_v2.c
+++ /dev/null
@@ -1,236 +0,0 @@
-/*
- * vfsv0 quota IO operations on file
- */
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/mount.h>
-#include <linux/dqblk_v2.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/quotaops.h>
-
-#include <asm/byteorder.h>
-
-#include "quota_tree.h"
-#include "quotaio_v2.h"
-
-MODULE_AUTHOR("Jan Kara");
-MODULE_DESCRIPTION("Quota format v2 support");
-MODULE_LICENSE("GPL");
-
-#define __QUOTA_V2_PARANOIA
-
-static void v2_mem2diskdqb(void *dp, struct dquot *dquot);
-static void v2_disk2memdqb(struct dquot *dquot, void *dp);
-static int v2_is_id(void *dp, struct dquot *dquot);
-
-static struct qtree_fmt_operations v2_qtree_ops = {
- .mem2disk_dqblk = v2_mem2diskdqb,
- .disk2mem_dqblk = v2_disk2memdqb,
- .is_id = v2_is_id,
-};
-
-#define QUOTABLOCK_BITS 10
-#define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)
-
-static inline qsize_t v2_stoqb(qsize_t space)
-{
- return (space + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS;
-}
-
-static inline qsize_t v2_qbtos(qsize_t blocks)
-{
- return blocks << QUOTABLOCK_BITS;
-}
-
-/* Check whether given file is really vfsv0 quotafile */
-static int v2_check_quota_file(struct super_block *sb, int type)
-{
- struct v2_disk_dqheader dqhead;
- ssize_t size;
- static const uint quota_magics[] = V2_INITQMAGICS;
- static const uint quota_versions[] = V2_INITQVERSIONS;
-
- size = sb->s_op->quota_read(sb, type, (char *)&dqhead, sizeof(struct v2_disk_dqheader), 0);
- if (size != sizeof(struct v2_disk_dqheader)) {
- printk("quota_v2: failed read expected=%zd got=%zd\n",
- sizeof(struct v2_disk_dqheader), size);
- return 0;
- }
- if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] ||
- le32_to_cpu(dqhead.dqh_version) != quota_versions[type])
- return 0;
- return 1;
-}
-
-/* Read information header from quota file */
-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,
- sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
- if (size != sizeof(struct v2_disk_dqinfo)) {
- printk(KERN_WARNING "Can't read info structure on device %s.\n",
- 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);
- 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;
-}
-
-/* Write information header to quota file */
-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);
- info->dqi_flags &= ~DQF_INFO_DIRTY;
- dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
- 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(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)) {
- printk(KERN_WARNING "Can't write info structure on device %s.\n",
- sb->s_id);
- return -1;
- }
- return 0;
-}
-
-static void v2_disk2memdqb(struct dquot *dquot, void *dp)
-{
- struct v2_disk_dqblk *d = dp, empty;
- struct mem_dqblk *m = &dquot->dq_dqb;
-
- m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit);
- m->dqb_isoftlimit = le32_to_cpu(d->dqb_isoftlimit);
- m->dqb_curinodes = le32_to_cpu(d->dqb_curinodes);
- m->dqb_itime = le64_to_cpu(d->dqb_itime);
- m->dqb_bhardlimit = v2_qbtos(le32_to_cpu(d->dqb_bhardlimit));
- m->dqb_bsoftlimit = v2_qbtos(le32_to_cpu(d->dqb_bsoftlimit));
- m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
- m->dqb_btime = le64_to_cpu(d->dqb_btime);
- /* We need to escape back all-zero structure */
- memset(&empty, 0, sizeof(struct v2_disk_dqblk));
- empty.dqb_itime = cpu_to_le64(1);
- if (!memcmp(&empty, dp, sizeof(struct v2_disk_dqblk)))
- m->dqb_itime = 0;
-}
-
-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)->dqi_priv;
-
- d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
- d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
- d->dqb_curinodes = cpu_to_le32(m->dqb_curinodes);
- d->dqb_itime = cpu_to_le64(m->dqb_itime);
- d->dqb_bhardlimit = cpu_to_le32(v2_stoqb(m->dqb_bhardlimit));
- d->dqb_bsoftlimit = cpu_to_le32(v2_stoqb(m->dqb_bsoftlimit));
- d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
- d->dqb_btime = cpu_to_le64(m->dqb_btime);
- d->dqb_id = cpu_to_le32(dquot->dq_id);
- if (qtree_entry_unused(info, dp))
- d->dqb_itime = cpu_to_le64(1);
-}
-
-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)->dqi_priv;
-
- if (qtree_entry_unused(info, dp))
- return 0;
- return le32_to_cpu(d->dqb_id) == dquot->dq_id;
-}
-
-static int v2_read_dquot(struct dquot *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)->dqi_priv, dquot);
-}
-
-static int v2_release_dquot(struct dquot *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 = v2_free_file_info,
- .read_dqblk = v2_read_dquot,
- .commit_dqblk = v2_write_dquot,
- .release_dqblk = v2_release_dquot,
-};
-
-static struct quota_format_type v2_quota_format = {
- .qf_fmt_id = QFMT_VFS_V0,
- .qf_ops = &v2_format_ops,
- .qf_owner = THIS_MODULE
-};
-
-static int __init init_v2_quota_format(void)
-{
- return register_quota_format(&v2_quota_format);
-}
-
-static void __exit exit_v2_quota_format(void)
-{
- unregister_quota_format(&v2_quota_format);
-}
-
-module_init(init_v2_quota_format);
-module_exit(exit_v2_quota_format);