On Fri, Aug 12, 2016 at 06:07:00PM -0500, Eric Sandeen wrote:
> The new XFS_GETQSTATV quotactl, available since kernel v3.12,
> was never implemented in xfs_quota, and the "state" command
> continues to use XFS_GETQSTAT, which cannot report both
> group & project quota on newer formats.
>
> The new call has room for all 3 quota types (user, group, and
> quota), vs just two, where previously project and quota
> overlapped.
>
> So:
>
> First, try XFS_GETQSTATV.
> If it passes, we have all the information we need, and we print
> it. state_qfilestat() is modified to take the newer structure.
>
> If it fails, try XFS_GETQSTAT. If that passes, we are on an
> older kernel with neither XFS_GETQSTATV nor the on-disk project
> quota inode. We copy the available information into the newer
> statv structure, carefully determining wither group or project
> (or neither) is actually active, and print it with the same
> state_qfilestat routine.
>
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Reviewed-by: Bill O'Donnell <billodo@xxxxxxxxxx>
> ---
>
> I probably could have done some memcpy()'s in
> state_stat_to_statv(), but opted for the explicit copy-out;
> the structures aren't identical, although the newer one
> only differs by padding on the end. If memcpy() is preferable
> I could send a V2...
>
>
> diff --git a/include/xqm.h b/include/xqm.h
> index c084b2d..78262c3 100644
> --- a/include/xqm.h
> +++ b/include/xqm.h
> @@ -32,6 +32,7 @@
> #define Q_XGETQSTAT XQM_CMD(5) /* get quota subsystem status */
> #define Q_XQUOTARM XQM_CMD(6) /* free disk space used by dquots */
> #define Q_XQUOTASYNC XQM_CMD(7) /* delalloc flush, updates dquots */
> +#define Q_XGETQSTATV XQM_CMD(8) /* newer version of get quota */
> #define Q_XGETNEXTQUOTA XQM_CMD(9) /* get disk limits and usage */
>
> /*
> @@ -149,4 +150,30 @@ typedef struct fs_quota_stat {
> __u16 qs_iwarnlimit; /* limit for num warnings */
> } fs_quota_stat_t;
>
> +/*
> + * Some basic information about 'quota files' for Q_XGETQSTATV command
> + */
> +struct fs_qfilestatv {
> + __u64 qfs_ino; /* inode number */
> + __u64 qfs_nblks; /* number of BBs 512-byte-blks */
> + __u32 qfs_nextents; /* number of extents */
> + __u32 qfs_pad; /* pad for 8-byte alignment */
> +};
> +
> +struct fs_quota_statv {
> + __s8 qs_version; /* version for future changes */
> + __u8 qs_pad1; /* pad for 16bit alignment */
> + __u16 qs_flags; /* FS_QUOTA_.* flags */
> + __u32 qs_incoredqs; /* number of dquots incore */
> + struct fs_qfilestatv qs_uquota; /* user quota information */
> + struct fs_qfilestatv qs_gquota; /* group quota information */
> + struct fs_qfilestatv qs_pquota; /* project quota information */
> + __s32 qs_btimelimit; /* limit for blks timer */
> + __s32 qs_itimelimit; /* limit for inodes timer */
> + __s32 qs_rtbtimelimit;/* limit for rt blks timer */
> + __u16 qs_bwarnlimit; /* limit for num warnings */
> + __u16 qs_iwarnlimit; /* limit for num warnings */
> + __u64 qs_pad2[8]; /* for future proofing */
> +};
> +
> #endif /* __XQM_H__ */
> diff --git a/quota/linux.c b/quota/linux.c
> index 74dba01..4f1f3c4 100644
> --- a/quota/linux.c
> +++ b/quota/linux.c
> @@ -55,6 +55,8 @@ xcommand_to_qcommand(
> return Q_XSETQLIM;
> case XFS_GETQSTAT:
> return Q_XGETQSTAT;
> + case XFS_GETQSTATV:
> + return Q_XGETQSTATV;
> case XFS_QUOTARM:
> return Q_XQUOTARM;
> case XFS_QSYNC:
> diff --git a/quota/state.c b/quota/state.c
> index 8186762..5d63579 100644
> --- a/quota/state.c
> +++ b/quota/state.c
> @@ -111,12 +111,12 @@ remove_help(void)
>
> static void
> state_qfilestat(
> - FILE *fp,
> - fs_path_t *mount,
> - uint type,
> - fs_qfilestat_t *qfs,
> - int accounting,
> - int enforcing)
> + FILE *fp,
> + struct fs_path *mount,
> + uint type,
> + struct fs_qfilestatv *qfs,
> + int accounting,
> + int enforcing)
> {
> fprintf(fp, _("%s quota state on %s (%s)\n"), type_to_string(type),
> mount->fs_dir, mount->fs_name);
> @@ -142,39 +142,94 @@ state_timelimit(
> time_to_string(timelimit, VERBOSE_FLAG | ABSOLUTE_FLAG));
> }
>
> +/*
> + * fs_quota_stat holds a subset of fs_quota_statv; this copies
> + * the smaller into the larger, leaving any not-present fields
> + * empty. This is so the same reporting function can be used
> + * for both XFS_GETQSTAT and XFS_GETQSTATV results.
> + */
> static void
> -state_quotafile_mount(
> - FILE *fp,
> - uint type,
> - fs_path_t *mount,
> - uint flags)
> +state_stat_to_statv(
> + struct fs_quota_stat *s,
> + struct fs_quota_statv *sv)
> {
> - fs_quota_stat_t s;
> - char *dev = mount->fs_name;
> + memset(sv, 0, sizeof(struct fs_quota_statv));
> +
> + /* shared information */
> + sv->qs_version = s->qs_version;
> + sv->qs_flags = s->qs_flags;
> + sv->qs_incoredqs = s->qs_incoredqs;
> + sv->qs_btimelimit = s->qs_btimelimit;
> + sv->qs_itimelimit = s->qs_itimelimit;
> + sv->qs_rtbtimelimit = s->qs_rtbtimelimit;
> + sv->qs_bwarnlimit = s->qs_bwarnlimit;
> + sv->qs_iwarnlimit = s->qs_iwarnlimit;
> +
> + /* Always room for uquota */
> + sv->qs_uquota.qfs_ino = s->qs_uquota.qfs_ino;
> + sv->qs_uquota.qfs_nblks = s->qs_uquota.qfs_nblks;
> + sv->qs_uquota.qfs_nextents = s->qs_uquota.qfs_nextents;
> +
> + /*
> + * If we are here, XFS_GETQSTATV failed and XFS_GETQSTAT passed;
> + * that is a very strong hint that we're on a kernel which predates
> + * the on-disk pquota inode; both were added in v3.12. So, we do
> + * some tricksy determination here.
> + * gs_gquota may hold either group quota inode info, or project
> + * quota if that is used instead; which one it actually holds depends
> + * on the quota flags. (If neither is set, neither is used)
> + */
> + if (s->qs_flags & XFS_QUOTA_GDQ_ACCT) {
> + /* gs_gquota holds group quota info */
> + sv->qs_gquota.qfs_ino = s->qs_gquota.qfs_ino;
> + sv->qs_gquota.qfs_nblks = s->qs_gquota.qfs_nblks;
> + sv->qs_gquota.qfs_nextents = s->qs_gquota.qfs_nextents;
> + } else if (s->qs_flags & XFS_QUOTA_PDQ_ACCT) {
> + /* gs_gquota actually holds project quota info */
> + sv->qs_pquota.qfs_ino = s->qs_gquota.qfs_ino;
> + sv->qs_pquota.qfs_nblks = s->qs_gquota.qfs_nblks;
> + sv->qs_pquota.qfs_nextents = s->qs_gquota.qfs_nextents;
> + }
> +}
>
> - if (xfsquotactl(XFS_GETQSTAT, dev, type, 0, (void *)&s) < 0) {
> - if (flags & VERBOSE_FLAG)
> - fprintf(fp, _("%s quota are not enabled on %s\n"),
> - type_to_string(type), dev);
> - return;
> +static void
> +state_quotafile_mount(
> + FILE *fp,
> + uint type,
> + struct fs_path *mount,
> + uint flags)
> +{
> + struct fs_quota_stat s;
> + struct fs_quota_statv sv;
> + char *dev = mount->fs_name;
> +
> + if (xfsquotactl(XFS_GETQSTATV, dev, type, 0, (void *)&sv) < 0) {
> + if (xfsquotactl(XFS_GETQSTAT, dev, type, 0, (void *)&s) < 0) {
> + if (flags & VERBOSE_FLAG)
> + fprintf(fp,
> + _("%s quota are not enabled on %s\n"),
> + type_to_string(type), dev);
> + return;
> + }
> + state_stat_to_statv(&s, &sv);
> }
>
> if (type & XFS_USER_QUOTA)
> - state_qfilestat(fp, mount, XFS_USER_QUOTA, &s.qs_uquota,
> - s.qs_flags & XFS_QUOTA_UDQ_ACCT,
> - s.qs_flags & XFS_QUOTA_UDQ_ENFD);
> + state_qfilestat(fp, mount, XFS_USER_QUOTA, &sv.qs_uquota,
> + sv.qs_flags & XFS_QUOTA_UDQ_ACCT,
> + sv.qs_flags & XFS_QUOTA_UDQ_ENFD);
> if (type & XFS_GROUP_QUOTA)
> - state_qfilestat(fp, mount, XFS_GROUP_QUOTA, &s.qs_gquota,
> - s.qs_flags & XFS_QUOTA_GDQ_ACCT,
> - s.qs_flags & XFS_QUOTA_GDQ_ENFD);
> + state_qfilestat(fp, mount, XFS_GROUP_QUOTA, &sv.qs_gquota,
> + sv.qs_flags & XFS_QUOTA_GDQ_ACCT,
> + sv.qs_flags & XFS_QUOTA_GDQ_ENFD);
> if (type & XFS_PROJ_QUOTA)
> - state_qfilestat(fp, mount, XFS_PROJ_QUOTA, &s.qs_gquota,
> - s.qs_flags & XFS_QUOTA_PDQ_ACCT,
> - s.qs_flags & XFS_QUOTA_PDQ_ENFD);
> + state_qfilestat(fp, mount, XFS_PROJ_QUOTA, &sv.qs_pquota,
> + sv.qs_flags & XFS_QUOTA_PDQ_ACCT,
> + sv.qs_flags & XFS_QUOTA_PDQ_ENFD);
>
> - state_timelimit(fp, XFS_BLOCK_QUOTA, s.qs_btimelimit);
> - state_timelimit(fp, XFS_INODE_QUOTA, s.qs_itimelimit);
> - state_timelimit(fp, XFS_RTBLOCK_QUOTA, s.qs_rtbtimelimit);
> + state_timelimit(fp, XFS_BLOCK_QUOTA, sv.qs_btimelimit);
> + state_timelimit(fp, XFS_INODE_QUOTA, sv.qs_itimelimit);
> + state_timelimit(fp, XFS_RTBLOCK_QUOTA, sv.qs_rtbtimelimit);
> }
>
> static void
>
>
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