![Nathan Scott](/assets/img/avatar_default.png)
pure bloat. SGI-PV: 952969 SGI-Modid: xfs-linux-melb:xfs-kern:26251a Signed-off-by: Nathan Scott <nathans@sgi.com>
430 lines
12 KiB
C
430 lines
12 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_clnt.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_alloc.h"
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#include "xfs_dmapi.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_ialloc.h"
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#include "xfs_itable.h"
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#include "xfs_btree.h"
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#include "xfs_bmap.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_rw.h"
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#include "xfs_acl.h"
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#include "xfs_cap.h"
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#include "xfs_mac.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_qm.h"
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#define MNTOPT_QUOTA "quota" /* disk quotas (user) */
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#define MNTOPT_NOQUOTA "noquota" /* no quotas */
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#define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */
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#define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */
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#define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */
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#define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */
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#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
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#define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */
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#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
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#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
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#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
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#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
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STATIC int
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xfs_qm_parseargs(
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struct bhv_desc *bhv,
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char *options,
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struct xfs_mount_args *args,
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int update)
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{
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size_t length;
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char *local_options = options;
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char *this_char;
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int error;
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int referenced = update;
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while ((this_char = strsep(&local_options, ",")) != NULL) {
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length = strlen(this_char);
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if (local_options)
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length++;
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if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
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args->flags &= ~(XFSMNT_UQUOTAENF|XFSMNT_UQUOTA);
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args->flags &= ~(XFSMNT_GQUOTAENF|XFSMNT_GQUOTA);
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referenced = update;
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} else if (!strcmp(this_char, MNTOPT_QUOTA) ||
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!strcmp(this_char, MNTOPT_UQUOTA) ||
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!strcmp(this_char, MNTOPT_USRQUOTA)) {
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args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
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referenced = 1;
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} else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
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!strcmp(this_char, MNTOPT_UQUOTANOENF)) {
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args->flags |= XFSMNT_UQUOTA;
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args->flags &= ~XFSMNT_UQUOTAENF;
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referenced = 1;
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} else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
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!strcmp(this_char, MNTOPT_PRJQUOTA)) {
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args->flags |= XFSMNT_PQUOTA | XFSMNT_PQUOTAENF;
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referenced = 1;
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} else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
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args->flags |= XFSMNT_PQUOTA;
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args->flags &= ~XFSMNT_PQUOTAENF;
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referenced = 1;
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} else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
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!strcmp(this_char, MNTOPT_GRPQUOTA)) {
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args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
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referenced = 1;
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} else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
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args->flags |= XFSMNT_GQUOTA;
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args->flags &= ~XFSMNT_GQUOTAENF;
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referenced = 1;
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} else {
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if (local_options)
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*(local_options-1) = ',';
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continue;
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}
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while (length--)
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*this_char++ = ',';
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}
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if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
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cmn_err(CE_WARN,
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"XFS: cannot mount with both project and group quota");
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return XFS_ERROR(EINVAL);
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}
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error = bhv_next_vfs_parseargs(BHV_NEXT(bhv), options, args, update);
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if (!error && !referenced)
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bhv_remove_vfsops(bhvtovfs(bhv), VFS_POSITION_QM);
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return error;
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}
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STATIC int
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xfs_qm_showargs(
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struct bhv_desc *bhv,
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struct seq_file *m)
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{
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struct bhv_vfs *vfsp = bhvtovfs(bhv);
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struct xfs_mount *mp = XFS_VFSTOM(vfsp);
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if (mp->m_qflags & XFS_UQUOTA_ACCT) {
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(mp->m_qflags & XFS_UQUOTA_ENFD) ?
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seq_puts(m, "," MNTOPT_USRQUOTA) :
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seq_puts(m, "," MNTOPT_UQUOTANOENF);
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}
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if (mp->m_qflags & XFS_PQUOTA_ACCT) {
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(mp->m_qflags & XFS_OQUOTA_ENFD) ?
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seq_puts(m, "," MNTOPT_PRJQUOTA) :
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seq_puts(m, "," MNTOPT_PQUOTANOENF);
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}
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if (mp->m_qflags & XFS_GQUOTA_ACCT) {
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(mp->m_qflags & XFS_OQUOTA_ENFD) ?
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seq_puts(m, "," MNTOPT_GRPQUOTA) :
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seq_puts(m, "," MNTOPT_GQUOTANOENF);
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}
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if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
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seq_puts(m, "," MNTOPT_NOQUOTA);
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return bhv_next_vfs_showargs(BHV_NEXT(bhv), m);
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}
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STATIC int
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xfs_qm_mount(
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struct bhv_desc *bhv,
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struct xfs_mount_args *args,
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struct cred *cr)
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{
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struct bhv_vfs *vfsp = bhvtovfs(bhv);
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struct xfs_mount *mp = XFS_VFSTOM(vfsp);
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if (args->flags & (XFSMNT_UQUOTA | XFSMNT_GQUOTA | XFSMNT_PQUOTA))
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xfs_qm_mount_quotainit(mp, args->flags);
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return bhv_next_vfs_mount(BHV_NEXT(bhv), args, cr);
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}
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/*
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* Directory tree accounting is implemented using project quotas, where
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* the project identifier is inherited from parent directories.
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* A statvfs (df, etc.) of a directory that is using project quota should
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* return a statvfs of the project, not the entire filesystem.
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* This makes such trees appear as if they are filesystems in themselves.
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*/
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STATIC int
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xfs_qm_statvfs(
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struct bhv_desc *bhv,
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bhv_statvfs_t *statp,
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struct bhv_vnode *vnode)
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{
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xfs_mount_t *mp;
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xfs_inode_t *ip;
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xfs_dquot_t *dqp;
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xfs_disk_dquot_t *dp;
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__uint64_t limit;
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int error;
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error = bhv_next_vfs_statvfs(BHV_NEXT(bhv), statp, vnode);
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if (error || !vnode)
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return error;
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mp = XFS_BHVTOM(bhv);
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ip = xfs_vtoi(vnode);
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if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
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return 0;
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if (!(mp->m_qflags & XFS_PQUOTA_ACCT))
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return 0;
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if (!(mp->m_qflags & XFS_OQUOTA_ENFD))
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return 0;
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if (xfs_qm_dqget(mp, NULL, ip->i_d.di_projid, XFS_DQ_PROJ, 0, &dqp))
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return 0;
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dp = &dqp->q_core;
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limit = dp->d_blk_softlimit ? dp->d_blk_softlimit : dp->d_blk_hardlimit;
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if (limit && statp->f_blocks > limit) {
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statp->f_blocks = limit;
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statp->f_bfree = (statp->f_blocks > dp->d_bcount) ?
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(statp->f_blocks - dp->d_bcount) : 0;
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}
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limit = dp->d_ino_softlimit ? dp->d_ino_softlimit : dp->d_ino_hardlimit;
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if (limit && statp->f_files > limit) {
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statp->f_files = limit;
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statp->f_ffree = (statp->f_files > dp->d_icount) ?
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(statp->f_ffree - dp->d_icount) : 0;
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}
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xfs_qm_dqput(dqp);
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return 0;
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}
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STATIC int
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xfs_qm_syncall(
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struct bhv_desc *bhv,
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int flags,
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cred_t *credp)
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{
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struct bhv_vfs *vfsp = bhvtovfs(bhv);
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struct xfs_mount *mp = XFS_VFSTOM(vfsp);
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int error;
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/*
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* Get the Quota Manager to flush the dquots.
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*/
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if (XFS_IS_QUOTA_ON(mp)) {
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if ((error = xfs_qm_sync(mp, flags))) {
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/*
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* If we got an IO error, we will be shutting down.
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* So, there's nothing more for us to do here.
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*/
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ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
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if (XFS_FORCED_SHUTDOWN(mp)) {
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return XFS_ERROR(error);
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}
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}
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}
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return bhv_next_vfs_sync(BHV_NEXT(bhv), flags, credp);
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}
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STATIC int
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xfs_qm_newmount(
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xfs_mount_t *mp,
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uint *needquotamount,
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uint *quotaflags)
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{
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uint quotaondisk;
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uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
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*quotaflags = 0;
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*needquotamount = B_FALSE;
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quotaondisk = XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
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(mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
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if (quotaondisk) {
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uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
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pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
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gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
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}
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/*
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* If the device itself is read-only, we can't allow
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* the user to change the state of quota on the mount -
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* this would generate a transaction on the ro device,
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* which would lead to an I/O error and shutdown
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*/
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if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
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(!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
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(pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
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(!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) ||
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(gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
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(!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
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xfs_dev_is_read_only(mp, "changing quota state")) {
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cmn_err(CE_WARN,
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"XFS: please mount with%s%s%s%s.",
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(!quotaondisk ? "out quota" : ""),
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(uquotaondisk ? " usrquota" : ""),
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(pquotaondisk ? " prjquota" : ""),
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(gquotaondisk ? " grpquota" : ""));
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return XFS_ERROR(EPERM);
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}
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if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
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/*
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* Call mount_quotas at this point only if we won't have to do
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* a quotacheck.
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*/
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if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
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/*
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* If an error occured, qm_mount_quotas code
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* has already disabled quotas. So, just finish
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* mounting, and get on with the boring life
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* without disk quotas.
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*/
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xfs_qm_mount_quotas(mp, 0);
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} else {
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/*
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* Clear the quota flags, but remember them. This
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* is so that the quota code doesn't get invoked
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* before we're ready. This can happen when an
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* inode goes inactive and wants to free blocks,
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* or via xfs_log_mount_finish.
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*/
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*needquotamount = B_TRUE;
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*quotaflags = mp->m_qflags;
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mp->m_qflags = 0;
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}
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}
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return 0;
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}
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STATIC int
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xfs_qm_endmount(
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xfs_mount_t *mp,
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uint needquotamount,
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uint quotaflags,
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int mfsi_flags)
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{
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if (needquotamount) {
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ASSERT(mp->m_qflags == 0);
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mp->m_qflags = quotaflags;
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xfs_qm_mount_quotas(mp, mfsi_flags);
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}
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#if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
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if (! (XFS_IS_QUOTA_ON(mp)))
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xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas not turned on");
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else
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xfs_fs_cmn_err(CE_NOTE, mp, "Disk quotas turned on");
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#endif
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#ifdef QUOTADEBUG
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if (XFS_IS_QUOTA_ON(mp) && xfs_qm_internalqcheck(mp))
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cmn_err(CE_WARN, "XFS: mount internalqcheck failed");
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#endif
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return 0;
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}
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STATIC void
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xfs_qm_dqrele_null(
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xfs_dquot_t *dq)
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{
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/*
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* Called from XFS, where we always check first for a NULL dquot.
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*/
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if (!dq)
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return;
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xfs_qm_dqrele(dq);
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}
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STATIC struct xfs_qmops xfs_qmcore_xfs = {
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.xfs_qminit = xfs_qm_newmount,
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.xfs_qmdone = xfs_qm_unmount_quotadestroy,
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.xfs_qmmount = xfs_qm_endmount,
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.xfs_qmunmount = xfs_qm_unmount_quotas,
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.xfs_dqrele = xfs_qm_dqrele_null,
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.xfs_dqattach = xfs_qm_dqattach,
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.xfs_dqdetach = xfs_qm_dqdetach,
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.xfs_dqpurgeall = xfs_qm_dqpurge_all,
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.xfs_dqvopalloc = xfs_qm_vop_dqalloc,
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.xfs_dqvopcreate = xfs_qm_vop_dqattach_and_dqmod_newinode,
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.xfs_dqvoprename = xfs_qm_vop_rename_dqattach,
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.xfs_dqvopchown = xfs_qm_vop_chown,
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.xfs_dqvopchownresv = xfs_qm_vop_chown_reserve,
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.xfs_dqtrxops = &xfs_trans_dquot_ops,
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};
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struct bhv_module_vfsops xfs_qmops = { {
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BHV_IDENTITY_INIT(VFS_BHV_QM, VFS_POSITION_QM),
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.vfs_parseargs = xfs_qm_parseargs,
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.vfs_showargs = xfs_qm_showargs,
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.vfs_mount = xfs_qm_mount,
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.vfs_statvfs = xfs_qm_statvfs,
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.vfs_sync = xfs_qm_syncall,
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.vfs_quotactl = xfs_qm_quotactl, },
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};
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void __init
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xfs_qm_init(void)
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{
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static char message[] __initdata =
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KERN_INFO "SGI XFS Quota Management subsystem\n";
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printk(message);
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mutex_init(&xfs_Gqm_lock);
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vfs_bhv_set_custom(&xfs_qmops, &xfs_qmcore_xfs);
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xfs_qm_init_procfs();
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}
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void __exit
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xfs_qm_exit(void)
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{
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vfs_bhv_clr_custom(&xfs_qmops);
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xfs_qm_cleanup_procfs();
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if (qm_dqzone)
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kmem_zone_destroy(qm_dqzone);
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if (qm_dqtrxzone)
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kmem_zone_destroy(qm_dqtrxzone);
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}
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