patch-2.4.25 linux-2.4.25/fs/xfs/quota/xfs_qm_bhv.c
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- Lines: 413
- Date:
2004-02-18 05:36:32.000000000 -0800
- Orig file:
linux-2.4.24/fs/xfs/quota/xfs_qm_bhv.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.24/fs/xfs/quota/xfs_qm_bhv.c linux-2.4.25/fs/xfs/quota/xfs_qm_bhv.c
@@ -0,0 +1,412 @@
+/*
+ * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 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.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_clnt.h"
+#include "xfs_trans.h"
+#include "xfs_sb.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_alloc_btree.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode.h"
+#include "xfs_bmap.h"
+#include "xfs_bit.h"
+#include "xfs_rtalloc.h"
+#include "xfs_error.h"
+#include "xfs_itable.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_UQUOTA "uquota" /* user quota (IRIX variant) */
+#define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */
+#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
+#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group 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_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++ = ',';
+ }
+
+ PVFS_PARSEARGS(BHV_NEXT(bhv), options, args, update, error);
+ 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 vfs *vfsp = bhvtovfs(bhv);
+ struct xfs_mount *mp = XFS_VFSTOM(vfsp);
+ int error;
+
+ 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_GQUOTA_ACCT) {
+ (mp->m_qflags & XFS_GQUOTA_ENFD) ?
+ seq_puts(m, "," MNTOPT_GRPQUOTA) :
+ seq_puts(m, "," MNTOPT_GQUOTANOENF);
+ }
+
+ if (!(mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_GQUOTA_ACCT)))
+ seq_puts(m, "," MNTOPT_NOQUOTA);
+
+ PVFS_SHOWARGS(BHV_NEXT(bhv), m, error);
+ return error;
+}
+
+STATIC int
+xfs_qm_mount(
+ struct bhv_desc *bhv,
+ struct xfs_mount_args *args,
+ struct cred *cr)
+{
+ struct vfs *vfsp = bhvtovfs(bhv);
+ struct xfs_mount *mp = XFS_VFSTOM(vfsp);
+ int error;
+
+ if (args->flags & (XFSMNT_UQUOTA | XFSMNT_GQUOTA))
+ xfs_qm_mount_quotainit(mp, args->flags);
+ PVFS_MOUNT(BHV_NEXT(bhv), args, cr, error);
+ return error;
+}
+
+STATIC int
+xfs_qm_syncall(
+ struct bhv_desc *bhv,
+ int flags,
+ cred_t *credp)
+{
+ struct 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);
+ }
+ }
+ }
+ PVFS_SYNC(BHV_NEXT(bhv), flags, credp, error);
+ return error;
+}
+
+/*
+ * When xfsquotas isn't installed and the superblock had quotas, we need to
+ * clear the quotaflags from superblock.
+ */
+STATIC void
+xfs_mount_reset_sbqflags(
+ xfs_mount_t *mp)
+{
+ xfs_trans_t *tp;
+ unsigned long s;
+
+ mp->m_qflags = 0;
+ /*
+ * It is OK to look at sb_qflags here in mount path,
+ * without SB_LOCK.
+ */
+ if (mp->m_sb.sb_qflags == 0)
+ return;
+ s = XFS_SB_LOCK(mp);
+ mp->m_sb.sb_qflags = 0;
+ XFS_SB_UNLOCK(mp, s);
+
+ /*
+ * if the fs is readonly, let the incore superblock run
+ * with quotas off but don't flush the update out to disk
+ */
+ if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
+ return;
+#ifdef QUOTADEBUG
+ xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
+#endif
+ tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
+ if (xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
+ XFS_DEFAULT_LOG_COUNT)) {
+ xfs_trans_cancel(tp, 0);
+ return;
+ }
+ xfs_mod_sb(tp, XFS_SB_QFLAGS);
+ xfs_trans_commit(tp, 0, NULL);
+}
+
+STATIC int
+xfs_qm_newmount(
+ xfs_mount_t *mp,
+ uint *needquotamount,
+ uint *quotaflags)
+{
+ uint quotaondisk;
+ uint uquotaondisk = 0, gquotaondisk = 0;
+
+ *quotaflags = 0;
+ *needquotamount = B_FALSE;
+
+ quotaondisk = XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
+ mp->m_sb.sb_qflags & (XFS_UQUOTA_ACCT|XFS_GQUOTA_ACCT);
+
+ if (quotaondisk) {
+ uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_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)) ||
+ (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
+ (!gquotaondisk && XFS_IS_GQUOTA_ON(mp))) &&
+ xfs_dev_is_read_only(mp, "changing quota state")) {
+ cmn_err(CE_WARN,
+ "XFS: please mount with%s%s%s.",
+ (!quotaondisk ? "out quota" : ""),
+ (uquotaondisk ? " usrquota" : ""),
+ (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 the xfs quota code isn't installed,
+ * we have to reset the quotachk'd bit.
+ * 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.
+ */
+ if (xfs_qm_mount_quotas(mp))
+ xfs_mount_reset_sbqflags(mp);
+ } 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)
+{
+ if (needquotamount) {
+ ASSERT(mp->m_qflags == 0);
+ mp->m_qflags = quotaflags;
+ if (xfs_qm_mount_quotas(mp))
+ xfs_mount_reset_sbqflags(mp);
+ }
+
+#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);
+}
+
+
+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_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_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, MUTEX_DEFAULT, "xfs_qmlock");
+ 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_cache_destroy(qm_dqzone);
+ if (qm_dqtrxzone)
+ kmem_cache_destroy(qm_dqtrxzone);
+}
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