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transmission/libtransmission/platform-quota.cc

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/*
* This file Copyright (C) 2013-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <event2/util.h> /* evutil_ascii_strcasecmp() */
#ifndef _WIN32
#include <unistd.h> /* getuid() */
#include <sys/types.h> /* types needed by quota.h */
#if defined(__FreeBSD__) || defined(__OpenBSD__)
#include <ufs/ufs/quota.h> /* quotactl() */
#elif defined(__DragonFly__)
#include <vfs/ufs/quota.h> /* quotactl */
#elif defined(__NetBSD__)
#include <sys/param.h>
#ifndef statfs
#define statfs statvfs
#endif
#elif defined(__sun)
#include <sys/fs/ufs_quota.h> /* quotactl */
#else
#include <sys/quota.h> /* quotactl() */
#endif
#ifdef HAVE_GETMNTENT
#ifdef __sun
#include <fcntl.h>
#include <stdio.h>
#include <sys/mntent.h>
#include <sys/mnttab.h>
#define _PATH_MOUNTED MNTTAB
#else
#include <mntent.h>
#include <paths.h> /* _PATH_MOUNTED */
#endif
#else /* BSD derived systems */
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#endif
#endif
#ifdef __APPLE__
#ifndef HAVE_SYS_STATVFS_H
#define HAVE_SYS_STATVFS_H
#endif
#ifndef HAVE_STATVFS
#define HAVE_STATVFS
#endif
#endif
#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#ifdef HAVE_XFS_XFS_H
#define HAVE_XQM
#include <xfs/xqm.h>
#endif
#include "transmission.h"
#include "tr-macros.h"
#include "utils.h"
#include "platform-quota.h"
/***
****
***/
#ifndef _WIN32
static char const* getdev(char const* path)
{
#ifdef HAVE_GETMNTENT
FILE* fp;
#ifdef __sun
struct mnttab mnt;
fp = fopen(_PATH_MOUNTED, "r");
if (fp == nullptr)
{
return nullptr;
}
while (getmntent(fp, &mnt) != -1)
{
if (tr_strcmp0(path, mnt.mnt_mountp) == 0)
{
break;
}
}
fclose(fp);
return mnt.mnt_special;
#else
struct mntent const* mnt;
fp = setmntent(_PATH_MOUNTED, "r");
if (fp == nullptr)
{
return nullptr;
}
while ((mnt = getmntent(fp)) != nullptr)
{
if (tr_strcmp0(path, mnt->mnt_dir) == 0)
{
break;
}
}
endmntent(fp);
return mnt != nullptr ? mnt->mnt_fsname : nullptr;
#endif
#else /* BSD derived systems */
int n;
struct statfs* mnt;
n = getmntinfo(&mnt, MNT_WAIT);
if (n == 0)
{
return nullptr;
}
for (int i = 0; i < n; i++)
{
if (tr_strcmp0(path, mnt[i].f_mntonname) == 0)
{
return mnt[i].f_mntfromname;
}
}
return nullptr;
#endif
}
static char const* getfstype(char const* device)
{
#ifdef HAVE_GETMNTENT
FILE* fp;
#ifdef __sun
struct mnttab mnt;
fp = fopen(_PATH_MOUNTED, "r");
if (fp == nullptr)
{
return nullptr;
}
while (getmntent(fp, &mnt) != -1)
{
if (tr_strcmp0(device, mnt.mnt_mountp) == 0)
{
break;
}
}
fclose(fp);
return mnt.mnt_fstype;
#else
struct mntent const* mnt;
fp = setmntent(_PATH_MOUNTED, "r");
if (fp == nullptr)
{
return nullptr;
}
while ((mnt = getmntent(fp)) != nullptr)
{
if (tr_strcmp0(device, mnt->mnt_fsname) == 0)
{
break;
}
}
endmntent(fp);
return mnt != nullptr ? mnt->mnt_type : nullptr;
#endif
#else /* BSD derived systems */
int n;
struct statfs* mnt;
n = getmntinfo(&mnt, MNT_WAIT);
if (n == 0)
{
return nullptr;
}
for (int i = 0; i < n; i++)
{
if (tr_strcmp0(device, mnt[i].f_mntfromname) == 0)
{
return mnt[i].f_fstypename;
}
}
return nullptr;
#endif
}
static char const* getblkdev(char const* path)
{
char* c;
char* dir;
char const* device;
dir = tr_strdup(path);
for (;;)
{
device = getdev(dir);
if (device != nullptr)
{
break;
}
c = strrchr(dir, '/');
if (c != nullptr)
{
*c = '\0';
}
else
{
break;
}
}
tr_free(dir);
return device;
}
#if defined(__NetBSD__) && __NetBSD_Version__ >= 600000000
extern "C"
{
#include <quota.h>
}
static int64_t getquota(char const* device)
{
struct quotahandle* qh;
struct quotakey qk;
struct quotaval qv;
int64_t limit;
int64_t freespace;
int64_t spaceused;
qh = quota_open(device);
if (qh == nullptr)
{
return -1;
}
qk.qk_idtype = QUOTA_IDTYPE_USER;
qk.qk_id = getuid();
qk.qk_objtype = QUOTA_OBJTYPE_BLOCKS;
if (quota_get(qh, &qk, &qv) == -1)
{
quota_close(qh);
return -1;
}
if (qv.qv_softlimit > 0)
{
limit = qv.qv_softlimit;
}
else if (qv.qv_hardlimit > 0)
{
limit = qv.qv_hardlimit;
}
else
{
quota_close(qh);
return -1;
}
spaceused = qv.qv_usage;
quota_close(qh);
freespace = limit - spaceused;
return freespace < 0 ? 0 : freespace;
}
#else
static int64_t getquota(char const* device)
{
#if defined(__DragonFly__)
struct ufs_dqblk dq;
#else
struct dqblk dq;
#endif
int64_t limit;
int64_t freespace;
int64_t spaceused;
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
if (quotactl(device, QCMD(Q_GETQUOTA, USRQUOTA), getuid(), (caddr_t)&dq) != 0)
{
return -1;
}
#elif defined(__sun)
struct quotctl op;
int fd = open(device, O_RDONLY);
if (fd < 0)
{
return -1;
}
op.op = Q_GETQUOTA;
op.uid = getuid();
op.addr = (caddr_t)&dq;
if (ioctl(fd, Q_QUOTACTL, &op) != 0)
{
close(fd);
return -1;
}
close(fd);
#else
if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device, getuid(), (caddr_t)&dq) != 0)
{
return -1;
}
#endif
if (dq.dqb_bsoftlimit > 0)
{
/* Use soft limit first */
limit = dq.dqb_bsoftlimit;
}
else if (dq.dqb_bhardlimit > 0)
{
limit = dq.dqb_bhardlimit;
}
else
{
/* No quota enabled for this user */
return -1;
}
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
spaceused = (int64_t)dq.dqb_curblocks >> 1;
#elif defined(__APPLE__)
spaceused = (int64_t)dq.dqb_curbytes;
#elif defined(__UCLIBC__) && !TR_UCLIBC_CHECK_VERSION(1, 0, 18)
spaceused = (int64_t)btodb(dq.dqb_curblocks);
#elif defined(__sun) || (defined(_LINUX_QUOTA_VERSION) && _LINUX_QUOTA_VERSION < 2)
spaceused = (int64_t)dq.dqb_curblocks >> 1;
#else
spaceused = btodb(dq.dqb_curspace);
#endif
freespace = limit - spaceused;
#ifdef __APPLE__
return freespace < 0 ? 0 : freespace;
#else
return freespace < 0 ? 0 : (freespace * 1024);
#endif
}
#endif
#ifdef HAVE_XQM
static int64_t getxfsquota(char* device)
{
int64_t limit;
int64_t freespace;
struct fs_disk_quota dq;
if (quotactl(QCMD(Q_XGETQUOTA, USRQUOTA), device, getuid(), (caddr_t)&dq) == 0)
{
if (dq.d_blk_softlimit > 0)
{
/* Use soft limit first */
limit = dq.d_blk_softlimit >> 1;
}
else if (dq.d_blk_hardlimit > 0)
{
limit = dq.d_blk_hardlimit >> 1;
}
else
{
/* No quota enabled for this user */
return -1;
}
freespace = limit - (dq.d_bcount >> 1);
return freespace < 0 ? 0 : (freespace * 1024);
}
/* something went wrong */
return -1;
}
#endif /* HAVE_XQM */
#endif /* _WIN32 */
static int64_t tr_getQuotaFreeSpace(struct tr_device_info const* info)
{
int64_t ret = -1;
#ifndef _WIN32
if (info->fstype != nullptr && evutil_ascii_strcasecmp(info->fstype, "xfs") == 0)
{
#ifdef HAVE_XQM
ret = getxfsquota(info->device);
#endif
}
else
{
ret = getquota(info->device);
}
#else /* _WIN32 */
TR_UNUSED(info);
#endif /* _WIN32 */
return ret;
}
static int64_t tr_getDiskFreeSpace(char const* path)
{
#ifdef _WIN32
int64_t ret = -1;
wchar_t* wide_path;
wide_path = tr_win32_utf8_to_native(path, -1);
if (wide_path != nullptr)
{
ULARGE_INTEGER freeBytesAvailable;
if (GetDiskFreeSpaceExW(wide_path, &freeBytesAvailable, nullptr, nullptr))
{
ret = freeBytesAvailable.QuadPart;
}
tr_free(wide_path);
}
return ret;
#elif defined(HAVE_STATVFS)
struct statvfs buf;
return statvfs(path, &buf) ? -1 : (int64_t)buf.f_bavail * (int64_t)buf.f_frsize;
#else
#warning FIXME: not implemented
return -1;
#endif
}
struct tr_device_info* tr_device_info_create(char const* path)
{
struct tr_device_info* info;
info = tr_new0(struct tr_device_info, 1);
info->path = tr_strdup(path);
#ifndef _WIN32
info->device = tr_strdup(getblkdev(path));
info->fstype = tr_strdup(getfstype(path));
#endif
return info;
}
void tr_device_info_free(struct tr_device_info* info)
{
if (info != nullptr)
{
tr_free(info->fstype);
tr_free(info->device);
tr_free(info->path);
tr_free(info);
}
}
int64_t tr_device_info_get_free_space(struct tr_device_info const* info)
{
int64_t free_space;
if (info == nullptr || info->path == nullptr)
{
errno = EINVAL;
free_space = -1;
}
else
{
free_space = tr_getQuotaFreeSpace(info);
if (free_space < 0)
{
free_space = tr_getDiskFreeSpace(info->path);
}
}
return free_space;
}
/***
****
***/
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