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137 lines
3.6 KiB
137 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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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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#include "xfs.h" |
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#include "xfs_fs.h" |
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#include "xfs_shared.h" |
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#include "xfs_format.h" |
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#include "xfs_log_format.h" |
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#include "xfs_trans_resv.h" |
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#include "xfs_quota.h" |
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#include "xfs_mount.h" |
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#include "xfs_inode.h" |
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#include "xfs_trans.h" |
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#include "xfs_qm.h" |
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STATIC void |
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xfs_fill_statvfs_from_dquot( |
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struct kstatfs *statp, |
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struct xfs_dquot *dqp) |
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{ |
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uint64_t limit; |
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limit = dqp->q_blk.softlimit ? |
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dqp->q_blk.softlimit : |
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dqp->q_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_bavail = |
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(statp->f_blocks > dqp->q_blk.reserved) ? |
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(statp->f_blocks - dqp->q_blk.reserved) : 0; |
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} |
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limit = dqp->q_ino.softlimit ? |
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dqp->q_ino.softlimit : |
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dqp->q_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 = |
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(statp->f_files > dqp->q_ino.reserved) ? |
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(statp->f_files - dqp->q_ino.reserved) : 0; |
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} |
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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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void |
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xfs_qm_statvfs( |
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struct xfs_inode *ip, |
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struct kstatfs *statp) |
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{ |
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struct xfs_mount *mp = ip->i_mount; |
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struct xfs_dquot *dqp; |
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if (!xfs_qm_dqget(mp, ip->i_projid, XFS_DQTYPE_PROJ, false, &dqp)) { |
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xfs_fill_statvfs_from_dquot(statp, dqp); |
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xfs_qm_dqput(dqp); |
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} |
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} |
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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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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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(gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) || |
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(!gquotaondisk && XFS_IS_GQUOTA_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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xfs_dev_is_read_only(mp, "changing quota state")) { |
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xfs_warn(mp, "please mount with%s%s%s%s.", |
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(!quotaondisk ? "out quota" : ""), |
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(uquotaondisk ? " usrquota" : ""), |
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(gquotaondisk ? " grpquota" : ""), |
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(pquotaondisk ? " prjquota" : "")); |
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return -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 occurred, 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); |
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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 = 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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