[PATCH 2/3] xfs: Add support for the Q_XGETQSTATV

[Chandra Seetharaman <sekharan@xxxxxxxxxx>]

For XFS, add support for Q_XGETQSTATV quotactl command.

Signed-off-by: Chandra Seetharaman <sekharan@xxxxxxxxxx>
---
 fs/xfs/xfs_qm.h          |    2 +
 fs/xfs/xfs_qm_syscalls.c |   82 ++++++++++++++++++++++++++++++++++++++++++++++
 fs/xfs/xfs_quotaops.c    |   13 +++++++
 3 files changed, 97 insertions(+), 0 deletions(-)

diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index 579d6a0..670cd44 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -160,6 +160,8 @@ extern int          xfs_qm_scall_setqlim(struct xfs_mount 
*, xfs_dqid_t, uint,
                                        struct fs_disk_quota *);
 extern int             xfs_qm_scall_getqstat(struct xfs_mount *,
                                        struct fs_quota_stat *);
+extern int             xfs_qm_scall_getqstatv(struct xfs_mount *,
+                                       struct fs_quota_statv *);
 extern int             xfs_qm_scall_quotaon(struct xfs_mount *, uint);
 extern int             xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
 
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 8d9e4c7..721aabe 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -406,6 +406,7 @@ xfs_qm_scall_quotaon(
 
 /*
  * Return quota status information, such as uquota-off, enforcements, etc.
+ * for Q_XGETQSTAT command.
  */
 int
 xfs_qm_scall_getqstat(
@@ -493,6 +494,87 @@ xfs_qm_scall_getqstat(
        return 0;
 }
 
+/*
+ * Return quota status information, such as uquota-off, enforcements, etc.
+ * for Q_XGETQSTATV command, to support separate project quota field.
+ */
+int
+xfs_qm_scall_getqstatv(
+       struct xfs_mount        *mp,
+       struct fs_quota_statv   *out)
+{
+       struct xfs_quotainfo    *q = mp->m_quotainfo;
+       struct xfs_inode        *uip = NULL;
+       struct xfs_inode        *gip = NULL;
+       struct xfs_inode        *pip = NULL;
+       bool                    tempuqip = false;
+       bool                    tempgqip = false;
+       bool                    temppqip = false;
+
+       if (!xfs_sb_version_hasquota(&mp->m_sb)) {
+               out->qs_uquota.qfs_ino = NULLFSINO;
+               out->qs_gquota.qfs_ino = NULLFSINO;
+               out->qs_pquota.qfs_ino = NULLFSINO;
+               return (0);
+       }
+
+       out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
+                                                       (XFS_ALL_QUOTA_ACCT|
+                                                        XFS_ALL_QUOTA_ENFD));
+       out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
+       out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
+       out->qs_pquota.qfs_ino = mp->m_sb.sb_pquotino;
+
+       if (q) {
+               uip = q->qi_uquotaip;
+               gip = q->qi_gquotaip;
+               pip = q->qi_pquotaip;
+       }
+       if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
+               if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
+                                       0, 0, &uip) == 0)
+                       tempuqip = true;
+       }
+       if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
+               if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
+                                       0, 0, &gip) == 0)
+                       tempgqip = true;
+       }
+       if (!pip && mp->m_sb.sb_pquotino != NULLFSINO) {
+               if (xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
+                                       0, 0, &pip) == 0)
+                       temppqip = true;
+       }
+       if (uip) {
+               out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
+               out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
+               if (tempuqip)
+                       IRELE(uip);
+       }
+
+       if (gip) {
+               out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
+               out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
+               if (tempgqip)
+                       IRELE(gip);
+       }
+       if (pip) {
+               out->qs_pquota.qfs_nblks = pip->i_d.di_nblocks;
+               out->qs_pquota.qfs_nextents = pip->i_d.di_nextents;
+               if (temppqip)
+                       IRELE(pip);
+       }
+       if (q) {
+               out->qs_incoredqs = q->qi_dquots;
+               out->qs_btimelimit = q->qi_btimelimit;
+               out->qs_itimelimit = q->qi_itimelimit;
+               out->qs_rtbtimelimit = q->qi_rtbtimelimit;
+               out->qs_bwarnlimit = q->qi_bwarnlimit;
+               out->qs_iwarnlimit = q->qi_iwarnlimit;
+       }
+       return 0;
+}
+
 #define XFS_DQ_MASK \
        (FS_DQ_LIMIT_MASK | FS_DQ_TIMER_MASK | FS_DQ_WARNS_MASK)
 
diff --git a/fs/xfs/xfs_quotaops.c b/fs/xfs/xfs_quotaops.c
index 20e30f9..fe945e5 100644
--- a/fs/xfs/xfs_quotaops.c
+++ b/fs/xfs/xfs_quotaops.c
@@ -54,6 +54,18 @@ xfs_fs_get_xstate(
 }
 
 STATIC int
+xfs_fs_get_xstatev(
+       struct super_block      *sb,
+       struct fs_quota_statv   *fqs)
+{
+       struct xfs_mount        *mp = XFS_M(sb);
+
+       if (!XFS_IS_QUOTA_RUNNING(mp))
+               return -ENOSYS;
+       return -xfs_qm_scall_getqstatv(mp, fqs);
+}
+
+STATIC int
 xfs_fs_set_xstate(
        struct super_block      *sb,
        unsigned int            uflags,
@@ -133,6 +145,7 @@ xfs_fs_set_dqblk(
 }
 
 const struct quotactl_ops xfs_quotactl_operations = {
+       .get_xstatev            = xfs_fs_get_xstatev,
        .get_xstate             = xfs_fs_get_xstate,
        .set_xstate             = xfs_fs_set_xstate,
        .get_dqblk              = xfs_fs_get_dqblk,
-- 
1.7.1