| /* |
| * 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); |
| } |
| |
| 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_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); |
| |
| 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 | XFSMNT_PQUOTA)) |
| xfs_qm_mount_quotainit(mp, args->flags); |
| PVFS_MOUNT(BHV_NEXT(bhv), args, cr, error); |
| return error; |
| } |
| |
| /* |
| * 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 = PVFS_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 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; |
| } |
| |
| 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_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); |
| } |