#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/fs.h>
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#include <linux/quota.h>
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#include <linux/quota.h>
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#include <linux/dqblk_v1.h>
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#include <linux/dqblk_v1.h>
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#include <linux/quotaio_v1.h>
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#include <linux/quotaio_v1.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/module.h>
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|
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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#include <asm/byteorder.h>
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#include <asm/byteorder.h>
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static void v1_disk2mem_dqblk(struct mem_dqblk *m, struct v1_disk_dqblk *d)
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static void v1_disk2mem_dqblk(struct mem_dqblk *m, struct v1_disk_dqblk *d)
|
{
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{
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m->dqb_ihardlimit = d->dqb_ihardlimit;
|
m->dqb_ihardlimit = d->dqb_ihardlimit;
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m->dqb_isoftlimit = d->dqb_isoftlimit;
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m->dqb_isoftlimit = d->dqb_isoftlimit;
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m->dqb_curinodes = d->dqb_curinodes;
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m->dqb_curinodes = d->dqb_curinodes;
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m->dqb_bhardlimit = d->dqb_bhardlimit;
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m->dqb_bhardlimit = d->dqb_bhardlimit;
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m->dqb_bsoftlimit = d->dqb_bsoftlimit;
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m->dqb_bsoftlimit = d->dqb_bsoftlimit;
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m->dqb_curspace = ((qsize_t)d->dqb_curblocks) << QUOTABLOCK_BITS;
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m->dqb_curspace = ((qsize_t)d->dqb_curblocks) << QUOTABLOCK_BITS;
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m->dqb_itime = d->dqb_itime;
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m->dqb_itime = d->dqb_itime;
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m->dqb_btime = d->dqb_btime;
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m->dqb_btime = d->dqb_btime;
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}
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}
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static void v1_mem2disk_dqblk(struct v1_disk_dqblk *d, struct mem_dqblk *m)
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static void v1_mem2disk_dqblk(struct v1_disk_dqblk *d, struct mem_dqblk *m)
|
{
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{
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d->dqb_ihardlimit = m->dqb_ihardlimit;
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d->dqb_ihardlimit = m->dqb_ihardlimit;
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d->dqb_isoftlimit = m->dqb_isoftlimit;
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d->dqb_isoftlimit = m->dqb_isoftlimit;
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d->dqb_curinodes = m->dqb_curinodes;
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d->dqb_curinodes = m->dqb_curinodes;
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d->dqb_bhardlimit = m->dqb_bhardlimit;
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d->dqb_bhardlimit = m->dqb_bhardlimit;
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d->dqb_bsoftlimit = m->dqb_bsoftlimit;
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d->dqb_bsoftlimit = m->dqb_bsoftlimit;
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d->dqb_curblocks = toqb(m->dqb_curspace);
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d->dqb_curblocks = toqb(m->dqb_curspace);
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d->dqb_itime = m->dqb_itime;
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d->dqb_itime = m->dqb_itime;
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d->dqb_btime = m->dqb_btime;
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d->dqb_btime = m->dqb_btime;
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}
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}
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static int v1_read_dqblk(struct dquot *dquot)
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static int v1_read_dqblk(struct dquot *dquot)
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{
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{
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int type = dquot->dq_type;
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int type = dquot->dq_type;
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struct file *filp;
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struct file *filp;
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mm_segment_t fs;
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mm_segment_t fs;
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loff_t offset;
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loff_t offset;
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struct v1_disk_dqblk dqblk;
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struct v1_disk_dqblk dqblk;
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filp = sb_dqopt(dquot->dq_sb)->files[type];
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filp = sb_dqopt(dquot->dq_sb)->files[type];
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if (filp == (struct file *)NULL)
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if (filp == (struct file *)NULL)
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return -EINVAL;
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return -EINVAL;
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memset(&dqblk, 0, sizeof(dqblk)); /* Initialize buffer in case file is too short */
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memset(&dqblk, 0, sizeof(dqblk)); /* Initialize buffer in case file is too short */
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/* Now we are sure filp is valid */
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/* Now we are sure filp is valid */
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offset = v1_dqoff(dquot->dq_id);
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offset = v1_dqoff(dquot->dq_id);
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fs = get_fs();
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fs = get_fs();
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set_fs(KERNEL_DS);
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set_fs(KERNEL_DS);
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filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset);
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filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset);
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set_fs(fs);
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set_fs(fs);
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v1_disk2mem_dqblk(&dquot->dq_dqb, &dqblk);
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v1_disk2mem_dqblk(&dquot->dq_dqb, &dqblk);
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if (dquot->dq_dqb.dqb_bhardlimit == 0 && dquot->dq_dqb.dqb_bsoftlimit == 0 &&
|
if (dquot->dq_dqb.dqb_bhardlimit == 0 && dquot->dq_dqb.dqb_bsoftlimit == 0 &&
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dquot->dq_dqb.dqb_ihardlimit == 0 && dquot->dq_dqb.dqb_isoftlimit == 0)
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dquot->dq_dqb.dqb_ihardlimit == 0 && dquot->dq_dqb.dqb_isoftlimit == 0)
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dquot->dq_flags |= DQ_FAKE;
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dquot->dq_flags |= DQ_FAKE;
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dqstats.reads++;
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dqstats.reads++;
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return 0;
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return 0;
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}
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}
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static int v1_commit_dqblk(struct dquot *dquot)
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static int v1_commit_dqblk(struct dquot *dquot)
|
{
|
{
|
short type = dquot->dq_type;
|
short type = dquot->dq_type;
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struct file *filp;
|
struct file *filp;
|
mm_segment_t fs;
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mm_segment_t fs;
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loff_t offset;
|
loff_t offset;
|
ssize_t ret;
|
ssize_t ret;
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struct v1_disk_dqblk dqblk;
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struct v1_disk_dqblk dqblk;
|
|
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filp = sb_dqopt(dquot->dq_sb)->files[type];
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filp = sb_dqopt(dquot->dq_sb)->files[type];
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offset = v1_dqoff(dquot->dq_id);
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offset = v1_dqoff(dquot->dq_id);
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fs = get_fs();
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fs = get_fs();
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set_fs(KERNEL_DS);
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set_fs(KERNEL_DS);
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/*
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/*
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* Note: clear the DQ_MOD flag unconditionally,
|
* Note: clear the DQ_MOD flag unconditionally,
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* so we don't loop forever on failure.
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* so we don't loop forever on failure.
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*/
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*/
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v1_mem2disk_dqblk(&dqblk, &dquot->dq_dqb);
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v1_mem2disk_dqblk(&dqblk, &dquot->dq_dqb);
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dquot->dq_flags &= ~DQ_MOD;
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dquot->dq_flags &= ~DQ_MOD;
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if (dquot->dq_id == 0) {
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if (dquot->dq_id == 0) {
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dqblk.dqb_btime = sb_dqopt(dquot->dq_sb)->info[type].dqi_bgrace;
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dqblk.dqb_btime = sb_dqopt(dquot->dq_sb)->info[type].dqi_bgrace;
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dqblk.dqb_itime = sb_dqopt(dquot->dq_sb)->info[type].dqi_igrace;
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dqblk.dqb_itime = sb_dqopt(dquot->dq_sb)->info[type].dqi_igrace;
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}
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}
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ret = 0;
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ret = 0;
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if (filp)
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if (filp)
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ret = filp->f_op->write(filp, (char *)&dqblk,
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ret = filp->f_op->write(filp, (char *)&dqblk,
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sizeof(struct v1_disk_dqblk), &offset);
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sizeof(struct v1_disk_dqblk), &offset);
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if (ret != sizeof(struct v1_disk_dqblk)) {
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if (ret != sizeof(struct v1_disk_dqblk)) {
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printk(KERN_WARNING "VFS: dquota write failed on dev %s\n",
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printk(KERN_WARNING "VFS: dquota write failed on dev %s\n",
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kdevname(dquot->dq_dev));
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kdevname(dquot->dq_dev));
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if (ret >= 0)
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if (ret >= 0)
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ret = -EIO;
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ret = -EIO;
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goto out;
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goto out;
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}
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}
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ret = 0;
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ret = 0;
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|
|
out:
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out:
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set_fs(fs);
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set_fs(fs);
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dqstats.writes++;
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dqstats.writes++;
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return ret;
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return ret;
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}
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}
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/* Magics of new quota format */
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/* Magics of new quota format */
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#define V2_INITQMAGICS {\
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#define V2_INITQMAGICS {\
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0xd9c01f11, /* USRQUOTA */\
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0xd9c01f11, /* USRQUOTA */\
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0xd9c01927 /* GRPQUOTA */\
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0xd9c01927 /* GRPQUOTA */\
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}
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}
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/* Header of new quota format */
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/* Header of new quota format */
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struct v2_disk_dqheader {
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struct v2_disk_dqheader {
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__u32 dqh_magic; /* Magic number identifying file */
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__u32 dqh_magic; /* Magic number identifying file */
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__u32 dqh_version; /* File version */
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__u32 dqh_version; /* File version */
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};
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};
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static int v1_check_quota_file(struct super_block *sb, int type)
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static int v1_check_quota_file(struct super_block *sb, int type)
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{
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{
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struct file *f = sb_dqopt(sb)->files[type];
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struct file *f = sb_dqopt(sb)->files[type];
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struct inode *inode = f->f_dentry->d_inode;
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struct inode *inode = f->f_dentry->d_inode;
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ulong blocks;
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ulong blocks;
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size_t off;
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size_t off;
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struct v2_disk_dqheader dqhead;
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struct v2_disk_dqheader dqhead;
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mm_segment_t fs;
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mm_segment_t fs;
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ssize_t size;
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ssize_t size;
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loff_t offset = 0;
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loff_t offset = 0;
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static const uint quota_magics[] = V2_INITQMAGICS;
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static const uint quota_magics[] = V2_INITQMAGICS;
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if (!inode->i_size)
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if (!inode->i_size)
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return 0;
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return 0;
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blocks = inode->i_size >> BLOCK_SIZE_BITS;
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blocks = inode->i_size >> BLOCK_SIZE_BITS;
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off = inode->i_size & (BLOCK_SIZE - 1);
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off = inode->i_size & (BLOCK_SIZE - 1);
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if ((blocks % sizeof(struct v1_disk_dqblk) * BLOCK_SIZE + off) % sizeof(struct v1_disk_dqblk))
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if ((blocks % sizeof(struct v1_disk_dqblk) * BLOCK_SIZE + off) % sizeof(struct v1_disk_dqblk))
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return 0;
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return 0;
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/* Doublecheck whether we didn't get file with new format - with old quotactl() this could happen */
|
/* Doublecheck whether we didn't get file with new format - with old quotactl() this could happen */
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fs = get_fs();
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fs = get_fs();
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set_fs(KERNEL_DS);
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set_fs(KERNEL_DS);
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size = f->f_op->read(f, (char *)&dqhead, sizeof(struct v2_disk_dqheader), &offset);
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size = f->f_op->read(f, (char *)&dqhead, sizeof(struct v2_disk_dqheader), &offset);
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set_fs(fs);
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set_fs(fs);
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if (size != sizeof(struct v2_disk_dqheader))
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if (size != sizeof(struct v2_disk_dqheader))
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return 1; /* Probably not new format */
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return 1; /* Probably not new format */
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if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type])
|
if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type])
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return 1; /* Definitely not new format */
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return 1; /* Definitely not new format */
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printk(KERN_INFO "VFS: %s: Refusing to turn on old quota format on given file. It probably contains newer quota format.\n", kdevname(sb->s_dev));
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printk(KERN_INFO "VFS: %s: Refusing to turn on old quota format on given file. It probably contains newer quota format.\n", kdevname(sb->s_dev));
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return 0; /* Seems like a new format file -> refuse it */
|
return 0; /* Seems like a new format file -> refuse it */
|
}
|
}
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static int v1_read_file_info(struct super_block *sb, int type)
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static int v1_read_file_info(struct super_block *sb, int type)
|
{
|
{
|
struct quota_info *dqopt = sb_dqopt(sb);
|
struct quota_info *dqopt = sb_dqopt(sb);
|
mm_segment_t fs;
|
mm_segment_t fs;
|
loff_t offset;
|
loff_t offset;
|
struct file *filp = dqopt->files[type];
|
struct file *filp = dqopt->files[type];
|
struct v1_disk_dqblk dqblk;
|
struct v1_disk_dqblk dqblk;
|
int ret;
|
int ret;
|
|
|
down(&dqopt->dqio_sem);
|
down(&dqopt->dqio_sem);
|
offset = v1_dqoff(0);
|
offset = v1_dqoff(0);
|
fs = get_fs();
|
fs = get_fs();
|
set_fs(KERNEL_DS);
|
set_fs(KERNEL_DS);
|
if ((ret = filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset)) != sizeof(struct v1_disk_dqblk)) {
|
if ((ret = filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset)) != sizeof(struct v1_disk_dqblk)) {
|
if (ret >= 0)
|
if (ret >= 0)
|
ret = -EIO;
|
ret = -EIO;
|
goto out;
|
goto out;
|
}
|
}
|
ret = 0;
|
ret = 0;
|
dqopt->info[type].dqi_igrace = dqblk.dqb_itime ? dqblk.dqb_itime : MAX_IQ_TIME;
|
dqopt->info[type].dqi_igrace = dqblk.dqb_itime ? dqblk.dqb_itime : MAX_IQ_TIME;
|
dqopt->info[type].dqi_bgrace = dqblk.dqb_btime ? dqblk.dqb_btime : MAX_DQ_TIME;
|
dqopt->info[type].dqi_bgrace = dqblk.dqb_btime ? dqblk.dqb_btime : MAX_DQ_TIME;
|
out:
|
out:
|
up(&dqopt->dqio_sem);
|
up(&dqopt->dqio_sem);
|
set_fs(fs);
|
set_fs(fs);
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static int v1_write_file_info(struct super_block *sb, int type)
|
static int v1_write_file_info(struct super_block *sb, int type)
|
{
|
{
|
struct quota_info *dqopt = sb_dqopt(sb);
|
struct quota_info *dqopt = sb_dqopt(sb);
|
mm_segment_t fs;
|
mm_segment_t fs;
|
struct file *filp = dqopt->files[type];
|
struct file *filp = dqopt->files[type];
|
struct v1_disk_dqblk dqblk;
|
struct v1_disk_dqblk dqblk;
|
loff_t offset;
|
loff_t offset;
|
int ret;
|
int ret;
|
|
|
down(&dqopt->dqio_sem);
|
down(&dqopt->dqio_sem);
|
dqopt->info[type].dqi_flags &= ~DQF_INFO_DIRTY;
|
dqopt->info[type].dqi_flags &= ~DQF_INFO_DIRTY;
|
offset = v1_dqoff(0);
|
offset = v1_dqoff(0);
|
fs = get_fs();
|
fs = get_fs();
|
set_fs(KERNEL_DS);
|
set_fs(KERNEL_DS);
|
if ((ret = filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset)) != sizeof(struct v1_disk_dqblk)) {
|
if ((ret = filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset)) != sizeof(struct v1_disk_dqblk)) {
|
if (ret >= 0)
|
if (ret >= 0)
|
ret = -EIO;
|
ret = -EIO;
|
goto out;
|
goto out;
|
}
|
}
|
dqblk.dqb_itime = dqopt->info[type].dqi_igrace;
|
dqblk.dqb_itime = dqopt->info[type].dqi_igrace;
|
dqblk.dqb_btime = dqopt->info[type].dqi_bgrace;
|
dqblk.dqb_btime = dqopt->info[type].dqi_bgrace;
|
offset = v1_dqoff(0);
|
offset = v1_dqoff(0);
|
ret = filp->f_op->write(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset);
|
ret = filp->f_op->write(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset);
|
if (ret == sizeof(struct v1_disk_dqblk))
|
if (ret == sizeof(struct v1_disk_dqblk))
|
ret = 0;
|
ret = 0;
|
else if (ret > 0)
|
else if (ret > 0)
|
ret = -EIO;
|
ret = -EIO;
|
out:
|
out:
|
up(&dqopt->dqio_sem);
|
up(&dqopt->dqio_sem);
|
set_fs(fs);
|
set_fs(fs);
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static struct quota_format_ops v1_format_ops = {
|
static struct quota_format_ops v1_format_ops = {
|
check_quota_file: v1_check_quota_file,
|
check_quota_file: v1_check_quota_file,
|
read_file_info: v1_read_file_info,
|
read_file_info: v1_read_file_info,
|
write_file_info: v1_write_file_info,
|
write_file_info: v1_write_file_info,
|
free_file_info: NULL,
|
free_file_info: NULL,
|
read_dqblk: v1_read_dqblk,
|
read_dqblk: v1_read_dqblk,
|
commit_dqblk: v1_commit_dqblk,
|
commit_dqblk: v1_commit_dqblk,
|
};
|
};
|
|
|
static struct quota_format_type v1_quota_format = {
|
static struct quota_format_type v1_quota_format = {
|
qf_fmt_id: QFMT_VFS_OLD,
|
qf_fmt_id: QFMT_VFS_OLD,
|
qf_ops: &v1_format_ops,
|
qf_ops: &v1_format_ops,
|
qf_owner: THIS_MODULE
|
qf_owner: THIS_MODULE
|
};
|
};
|
|
|
static int __init init_v1_quota_format(void)
|
static int __init init_v1_quota_format(void)
|
{
|
{
|
return register_quota_format(&v1_quota_format);
|
return register_quota_format(&v1_quota_format);
|
}
|
}
|
|
|
static void __exit exit_v1_quota_format(void)
|
static void __exit exit_v1_quota_format(void)
|
{
|
{
|
unregister_quota_format(&v1_quota_format);
|
unregister_quota_format(&v1_quota_format);
|
}
|
}
|
|
|
EXPORT_NO_SYMBOLS;
|
EXPORT_NO_SYMBOLS;
|
|
|
module_init(init_v1_quota_format);
|
module_init(init_v1_quota_format);
|
module_exit(exit_v1_quota_format);
|
module_exit(exit_v1_quota_format);
|
|
|
|
|
