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/** quotaio.c
*
* Generic IO operations on quotafiles
* Jan Kara <jack@suse.cz> - sponsored by SuSE CR
* Aditya Kali <adityakali@google.com> - Ported to e2fsprogs
* Hyojun Kim <hyojun@google.com> - Ported to f2fs-tools
*/
#include "config.h"
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <assert.h>
#include "common.h"
#include "quotaio.h"
static const char * const extensions[MAXQUOTAS] = {
[USRQUOTA] = "user",
[GRPQUOTA] = "group",
[PRJQUOTA] = "project",
};
/* Header in all newer quotafiles */
struct disk_dqheader {
__le32 dqh_magic;
__le32 dqh_version;
} __attribute__ ((packed));
/**
* Convert type of quota to written representation
*/
const char *quota_type2name(enum quota_type qtype)
{
if (qtype >= MAXQUOTAS)
return "unknown";
return extensions[qtype];
}
/*
* Set grace time if needed
*/
void update_grace_times(struct dquot *q)
{
time_t now;
time(&now);
if (q->dq_dqb.dqb_bsoftlimit && toqb(q->dq_dqb.dqb_curspace) >
q->dq_dqb.dqb_bsoftlimit) {
if (!q->dq_dqb.dqb_btime)
q->dq_dqb.dqb_btime =
now + q->dq_h->qh_info.dqi_bgrace;
} else {
q->dq_dqb.dqb_btime = 0;
}
if (q->dq_dqb.dqb_isoftlimit && q->dq_dqb.dqb_curinodes >
q->dq_dqb.dqb_isoftlimit) {
if (!q->dq_dqb.dqb_itime)
q->dq_dqb.dqb_itime =
now + q->dq_h->qh_info.dqi_igrace;
} else {
q->dq_dqb.dqb_itime = 0;
}
}
/* Functions to read/write quota file. */
static unsigned int quota_write_nomount(struct quota_file *qf,
long offset,
void *buf, unsigned int size)
{
unsigned int written;
written = f2fs_write(qf->sbi, qf->ino, buf, size, offset);
if (qf->filesize < offset + written)
qf->filesize = offset + written;
return written;
}
static unsigned int quota_read_nomount(struct quota_file *qf, long offset,
void *buf, unsigned int size)
{
return f2fs_read(qf->sbi, qf->ino, buf, size, offset);
}
/*
* Detect quota format and initialize quota IO
*/
errcode_t quota_file_open(struct f2fs_sb_info *sbi, struct quota_handle *h,
enum quota_type qtype, int flags)
{
struct f2fs_fsck *fsck = F2FS_FSCK(sbi);
struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
quota_ctx_t qctx = fsck->qctx;
f2fs_ino_t qf_ino;
errcode_t err = 0;
int allocated_handle = 0;
if (qtype >= MAXQUOTAS)
return EINVAL;
qf_ino = sb->qf_ino[qtype];
if (!h) {
if (qctx->quota_file[qtype]) {
h = qctx->quota_file[qtype];
(void) quota_file_close(sbi, h, 0);
}
err = quota_get_mem(sizeof(struct quota_handle), &h);
if (err) {
log_err("Unable to allocate quota handle");
return err;
}
allocated_handle = 1;
}
h->qh_qf.sbi = sbi;
h->qh_qf.ino = qf_ino;
h->write = quota_write_nomount;
h->read = quota_read_nomount;
h->qh_file_flags = flags;
h->qh_io_flags = 0;
h->qh_type = qtype;
h->qh_fmt = QFMT_VFS_V1;
memset(&h->qh_info, 0, sizeof(h->qh_info));
h->qh_ops = "afile_ops_2;
if (h->qh_ops->check_file &&
(h->qh_ops->check_file(h, qtype) == 0)) {
log_err("qh_ops->check_file failed");
err = EIO;
goto errout;
}
if (h->qh_ops->init_io && (h->qh_ops->init_io(h) < 0)) {
log_err("qh_ops->init_io failed");
err = EIO;
goto errout;
}
if (allocated_handle)
qctx->quota_file[qtype] = h;
errout:
return err;
}
/*
* Create new quotafile of specified format on given filesystem
*/
errcode_t quota_file_create(struct f2fs_sb_info *sbi, struct quota_handle *h,
enum quota_type qtype)
{
struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
f2fs_ino_t qf_inum = sb->qf_ino[qtype];
errcode_t err = 0;
h->qh_qf.sbi = sbi;
h->qh_qf.ino = qf_inum;
h->write = quota_write_nomount;
h->read = quota_read_nomount;
log_debug("Creating quota ino=%u, type=%d", qf_inum, qtype);
h->qh_io_flags = 0;
h->qh_type = qtype;
h->qh_fmt = QFMT_VFS_V1;
memset(&h->qh_info, 0, sizeof(h->qh_info));
h->qh_ops = "afile_ops_2;
if (h->qh_ops->new_io && (h->qh_ops->new_io(h) < 0)) {
log_err("qh_ops->new_io failed");
err = EIO;
}
return err;
}
/*
* Close quotafile and release handle
*/
errcode_t quota_file_close(struct f2fs_sb_info *sbi, struct quota_handle *h,
int update_filesize)
{
struct f2fs_fsck *fsck = F2FS_FSCK(sbi);
quota_ctx_t qctx = fsck->qctx;
if (h->qh_io_flags & IOFL_INFODIRTY) {
if (h->qh_ops->write_info && h->qh_ops->write_info(h) < 0)
return EIO;
h->qh_io_flags &= ~IOFL_INFODIRTY;
}
if (h->qh_ops->end_io && h->qh_ops->end_io(h) < 0)
return EIO;
if (update_filesize) {
f2fs_filesize_update(sbi, h->qh_qf.ino, h->qh_qf.filesize);
}
if (qctx->quota_file[h->qh_type] == h)
quota_free_mem(&qctx->quota_file[h->qh_type]);
return 0;
}
/*
* Create empty quota structure
*/
struct dquot *get_empty_dquot(void)
{
struct dquot *dquot;
if (quota_get_memzero(sizeof(struct dquot), &dquot)) {
log_err("Failed to allocate dquot");
return NULL;
}
dquot->dq_id = -1;
return dquot;
}
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