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b83bd13881
linux/fs/xfs/quota/xfs_qm_bhv.c
Nathan Scott b83bd13881 [XFS] Resolve a namespace collision on vfs/vfsops for FreeBSD porters. 
SGI-PV: 9533338
SGI-Modid: xfs-linux-melb:xfs-kern:26106a

Signed-off-by: Nathan Scott <nathans@sgi.com>
2006-06-09 16:48:30 +10:00

432 lines
12 KiB
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/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_clnt.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_alloc.h"
#include "xfs_dmapi.h"
#include "xfs_quota.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_attr_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_ialloc.h"
#include "xfs_itable.h"
#include "xfs_btree.h"
#include "xfs_bmap.h"
#include "xfs_rtalloc.h"
#include "xfs_error.h"
#include "xfs_rw.h"
#include "xfs_acl.h"
#include "xfs_cap.h"
#include "xfs_mac.h"
#include "xfs_attr.h"
#include "xfs_buf_item.h"
#include "xfs_qm.h"
#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
#define MNTOPT_NOQUOTA "noquota" /* no quotas */
#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
STATIC int
xfs_qm_parseargs(
struct bhv_desc *bhv,
char *options,
struct xfs_mount_args *args,
int update)
{
size_t length;
char *local_options = options;
char *this_char;
int error;
int referenced = update;
while ((this_char = strsep(&local_options, ",")) != NULL) {
length = strlen(this_char);
if (local_options)
length++;
if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
args->flags &= ~(XFSMNT_UQUOTAENF|XFSMNT_UQUOTA);
args->flags &= ~(XFSMNT_GQUOTAENF|XFSMNT_GQUOTA);
referenced = update;
} else if (!strcmp(this_char, MNTOPT_QUOTA) ||
!strcmp(this_char, MNTOPT_UQUOTA) ||
!strcmp(this_char, MNTOPT_USRQUOTA)) {
args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
referenced = 1;
} else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
!strcmp(this_char, MNTOPT_UQUOTANOENF)) {
args->flags |= XFSMNT_UQUOTA;
args->flags &= ~XFSMNT_UQUOTAENF;
referenced = 1;
} else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
!strcmp(this_char, MNTOPT_PRJQUOTA)) {
args->flags |= XFSMNT_PQUOTA | XFSMNT_PQUOTAENF;
referenced = 1;
} else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
args->flags |= XFSMNT_PQUOTA;
args->flags &= ~XFSMNT_PQUOTAENF;
referenced = 1;
} else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
!strcmp(this_char, MNTOPT_GRPQUOTA)) {
args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
referenced = 1;
} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
args->flags |= XFSMNT_GQUOTA;
args->flags &= ~XFSMNT_GQUOTAENF;
referenced = 1;
} else {
if (local_options)
*(local_options-1) = ',';
continue;
}
while (length--)
*this_char++ = ',';
}
if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
cmn_err(CE_WARN,
"XFS: cannot mount with both project and group quota");
return XFS_ERROR(EINVAL);
}
error = bhv_next_vfs_parseargs(BHV_NEXT(bhv), options, args, update);
if (!error && !referenced)
bhv_remove_vfsops(bhvtovfs(bhv), VFS_POSITION_QM);
return error;
}
STATIC int
xfs_qm_showargs(
struct bhv_desc *bhv,
struct seq_file *m)
{
struct bhv_vfs *vfsp = bhvtovfs(bhv);
struct xfs_mount *mp = XFS_VFSTOM(vfsp);
if (mp->m_qflags & XFS_UQUOTA_ACCT) {
(mp->m_qflags & XFS_UQUOTA_ENFD) ?
seq_puts(m, "," MNTOPT_USRQUOTA) :
seq_puts(m, "," MNTOPT_UQUOTANOENF);
}
if (mp->m_qflags & XFS_PQUOTA_ACCT) {
(mp->m_qflags & XFS_OQUOTA_ENFD) ?
seq_puts(m, "," MNTOPT_PRJQUOTA) :
seq_puts(m, "," MNTOPT_PQUOTANOENF);
}
if (mp->m_qflags & XFS_GQUOTA_ACCT) {
(mp->m_qflags & XFS_OQUOTA_ENFD) ?
seq_puts(m, "," MNTOPT_GRPQUOTA) :
seq_puts(m, "," MNTOPT_GQUOTANOENF);
}
if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
seq_puts(m, "," MNTOPT_NOQUOTA);
return bhv_next_vfs_showargs(BHV_NEXT(bhv), m);
}
STATIC int
xfs_qm_mount(
struct bhv_desc *bhv,
struct xfs_mount_args *args,
struct cred *cr)
{
struct bhv_vfs *vfsp = bhvtovfs(bhv);
struct xfs_mount *mp = XFS_VFSTOM(vfsp);
if (args->flags & (XFSMNT_UQUOTA | XFSMNT_GQUOTA | XFSMNT_PQUOTA))
xfs_qm_mount_quotainit(mp, args->flags);
return bhv_next_vfs_mount(BHV_NEXT(bhv), args, cr);
}
/*
* Directory tree accounting is implemented using project quotas, where
* the project identifier is inherited from parent directories.
* A statvfs (df, etc.) of a directory that is using project quota should
* return a statvfs of the project, not the entire filesystem.
* This makes such trees appear as if they are filesystems in themselves.
*/
STATIC int
xfs_qm_statvfs(
struct bhv_desc *bhv,
xfs_statfs_t *statp,
struct vnode *vnode)
{
xfs_mount_t *mp;
xfs_inode_t *ip;
xfs_dquot_t *dqp;
xfs_disk_dquot_t *dp;
__uint64_t limit;
int error;
error = bhv_next_vfs_statvfs(BHV_NEXT(bhv), statp, vnode);
if (error || !vnode)
return error;
mp = XFS_BHVTOM(bhv);
ip = xfs_vtoi(vnode);
if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
return 0;
if (!(mp->m_qflags & XFS_PQUOTA_ACCT))
return 0;
if (!(mp->m_qflags & XFS_OQUOTA_ENFD))
return 0;
if (xfs_qm_dqget(mp, NULL, ip->i_d.di_projid, XFS_DQ_PROJ, 0, &dqp))
return 0;
dp = &dqp->q_core;
limit = dp->d_blk_softlimit ? dp->d_blk_softlimit : dp->d_blk_hardlimit;
if (limit && statp->f_blocks > limit) {
statp->f_blocks = limit;
statp->f_bfree = (statp->f_blocks > dp->d_bcount) ?
(statp->f_blocks - dp->d_bcount) : 0;
}
limit = dp->d_ino_softlimit ? dp->d_ino_softlimit : dp->d_ino_hardlimit;
if (limit && statp->f_files > limit) {
statp->f_files = limit;
statp->f_ffree = (statp->f_files > dp->d_icount) ?
(statp->f_ffree - dp->d_icount) : 0;
}
xfs_qm_dqput(dqp);
return 0;
}
STATIC int
xfs_qm_syncall(
struct bhv_desc *bhv,
int flags,
cred_t *credp)
{
struct bhv_vfs *vfsp = bhvtovfs(bhv);
struct xfs_mount *mp = XFS_VFSTOM(vfsp);
int error;
/*
* Get the Quota Manager to flush the dquots.
*/
if (XFS_IS_QUOTA_ON(mp)) {
if ((error = xfs_qm_sync(mp, flags))) {
/*
* If we got an IO error, we will be shutting down.
* So, there's nothing more for us to do here.
*/
ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
if (XFS_FORCED_SHUTDOWN(mp)) {
return XFS_ERROR(error);
}
}
}
return bhv_next_vfs_sync(BHV_NEXT(bhv), flags, credp);
}
STATIC int
xfs_qm_newmount(
xfs_mount_t *mp,
uint *needquotamount,
uint *quotaflags)
{
uint quotaondisk;
uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
*quotaflags = 0;
*needquotamount = B_FALSE;
quotaondisk = XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
(mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
if (quotaondisk) {
uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
}
/*
* If the device itself is read-only, we can't allow
* the user to change the state of quota on the mount -
* this would generate a transaction on the ro device,
* which would lead to an I/O error and shutdown
*/
if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
(!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
(pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
(!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) ||
(gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
(!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
xfs_dev_is_read_only(mp, "changing quota state")) {
cmn_err(CE_WARN,
"XFS: please mount with%s%s%s%s.",
(!quotaondisk ? "out quota" : ""),
(uquotaondisk ? " usrquota" : ""),
(pquotaondisk ? " prjquota" : ""),
(gquotaondisk ? " grpquota" : ""));
return XFS_ERROR(EPERM);
}
if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
/*
* Call mount_quotas at this point only if we won't have to do
* a quotacheck.
*/
if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
/*
* If an error occured, qm_mount_quotas code
* has already disabled quotas. So, just finish
* mounting, and get on with the boring life
* without disk quotas.
*/
xfs_qm_mount_quotas(mp, 0);
} else {
/*
* Clear the quota flags, but remember them. This
* is so that the quota code doesn't get invoked
* before we're ready. This can happen when an
* inode goes inactive and wants to free blocks,
* or via xfs_log_mount_finish.
*/
*needquotamount = B_TRUE;
*quotaflags = mp->m_qflags;
mp->m_qflags = 0;
}
}
return 0;
}
STATIC int
xfs_qm_endmount(
xfs_mount_t *mp,
uint needquotamount,
uint quotaflags,
int mfsi_flags)
{
if (needquotamount) {
ASSERT(mp->m_qflags == 0);
mp->m_qflags = quotaflags;
xfs_qm_mount_quotas(mp, mfsi_flags);
}
#if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
if (! (XFS_IS_QUOTA_ON(mp)))
xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas not turned on");
else
xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas turned on");
#endif
#ifdef QUOTADEBUG
if (XFS_IS_QUOTA_ON(mp) && xfs_qm_internalqcheck(mp))
cmn_err(CE_WARN, "XFS: mount internalqcheck failed");
#endif
return 0;
}
STATIC void
xfs_qm_dqrele_null(
xfs_dquot_t *dq)
{
/*
* Called from XFS, where we always check first for a NULL dquot.
*/
if (!dq)
return;
xfs_qm_dqrele(dq);
}
STATIC struct xfs_qmops xfs_qmcore_xfs = {
.xfs_qminit = xfs_qm_newmount,
.xfs_qmdone = xfs_qm_unmount_quotadestroy,
.xfs_qmmount = xfs_qm_endmount,
.xfs_qmunmount = xfs_qm_unmount_quotas,
.xfs_dqrele = xfs_qm_dqrele_null,
.xfs_dqattach = xfs_qm_dqattach,
.xfs_dqdetach = xfs_qm_dqdetach,
.xfs_dqpurgeall = xfs_qm_dqpurge_all,
.xfs_dqvopalloc = xfs_qm_vop_dqalloc,
.xfs_dqvopcreate = xfs_qm_vop_dqattach_and_dqmod_newinode,
.xfs_dqvoprename = xfs_qm_vop_rename_dqattach,
.xfs_dqvopchown = xfs_qm_vop_chown,
.xfs_dqvopchownresv = xfs_qm_vop_chown_reserve,
.xfs_dqtrxops = &xfs_trans_dquot_ops,
};
struct bhv_module_vfsops xfs_qmops = { {
BHV_IDENTITY_INIT(VFS_BHV_QM, VFS_POSITION_QM),
.vfs_parseargs = xfs_qm_parseargs,
.vfs_showargs = xfs_qm_showargs,
.vfs_mount = xfs_qm_mount,
.vfs_statvfs = xfs_qm_statvfs,
.vfs_sync = xfs_qm_syncall,
.vfs_quotactl = xfs_qm_quotactl, },
};
void __init
xfs_qm_init(void)
{
static char message[] __initdata =
KERN_INFO "SGI XFS Quota Management subsystem\n";
printk(message);
mutex_init(&xfs_Gqm_lock);
vfs_bhv_set_custom(&xfs_qmops, &xfs_qmcore_xfs);
xfs_qm_init_procfs();
}
void __exit
xfs_qm_exit(void)
{
vfs_bhv_clr_custom(&xfs_qmops);
xfs_qm_cleanup_procfs();
if (qm_dqzone)
kmem_zone_destroy(qm_dqzone);
if (qm_dqtrxzone)
kmem_zone_destroy(qm_dqtrxzone);
}
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