[PATCH v3 0/5] xfsprogs: optimize -L/-U range calls for xfs_quota's dump/report

[PATCH v3 0/5] xfsprogs: optimize -L/-U range calls for xfs_quota's dump/report

[Andrey Albershteyn]

The xfs_quota's 'report' and 'dump' commands have -L and -U
arguments for restricting quota querying to the range of
UIDs/GIDs/PIDs. The current implementation is using XFS_GETQUOTA to
get every ID in specified range. It doesn't perform well on wider
ranges. Also, the fallback case (UIDs from /etc/passwd) doesn't take
into account range restriction and outputs all users with quota.

First 3 patches do minor refactoring to split acquisition and
outputting of the quota information. This is not that necessary, but
makes it easier to manipulate with acquired data.

The 4th one replaces XFS_GETQUOTA based loop with XFS_GETNEXTQUOTA
one. The latter returns ID of the next user/group/project with
non-empty quota. The ID is then used for further call.

The last patch adds range checks for fallback case when
XFS_GETNEXTQUOTA is not available.

The fallback case will be also executed in case that empty range is
specified (e.g. -L <too high>), but will print nothing.

Changes from v1:
Darrick J. Wong:
- Renamed get_quota() -> get_dquot()
Christoph Hellwig:
- Formatting: if() with tab, operators without spaces, long lines
- Replace 'fs_disk_quota_t' with 'struct fs_disk_quota'
- Merge and then split patch 2 & 3, so dump_file() and
  report_mount() are in separate patches
Changes from v2:
- Get rid of oid parameter

Andrey Albershteyn (5):
  xfs_quota: separate quota info acquisition into get_dquot()
  xfs_quota: separate get_dquot() and dump_file()
  xfs_quota: separate get_dquot() and report_mount()
  xfs_quota: utilize XFS_GETNEXTQUOTA for ranged calls in report/dump
  xfs_quota: apply -L/-U range limits in uid/gid/pid loops

 quota/report.c | 343 ++++++++++++++++++++++++-------------------------
 1 file changed, 168 insertions(+), 175 deletions(-)

-- 
2.27.0

[PATCH v3 1/5] xfs_quota: separate quota info acquisition into get_dquot()

[Andrey Albershteyn]

Both report_mount() and dump_file() have identical code to get quota
information. This could be used for further separation of the
functions.

Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
 quota/report.c | 49 +++++++++++++++++++++++--------------------------
 1 file changed, 23 insertions(+), 26 deletions(-)

diff --git a/quota/report.c b/quota/report.c
index 2eb5b5a9..6994cba6 100644
--- a/quota/report.c
+++ b/quota/report.c
@@ -59,16 +59,15 @@ report_help(void)
 "\n"));
 }
 
-static int 
-dump_file(
-	FILE		*fp,
+static int
+get_dquot(
+	struct fs_disk_quota *d,
 	uint		id,
 	uint		*oid,
 	uint		type,
 	char		*dev,
 	int		flags)
 {
-	fs_disk_quota_t	d;
 	int		cmd;
 
 	if (flags & GETNEXTQUOTA_FLAG)
@@ -77,7 +76,7 @@ dump_file(
 		cmd = XFS_GETQUOTA;
 
 	/* Fall back silently if XFS_GETNEXTQUOTA fails, warn on XFS_GETQUOTA */
-	if (xfsquotactl(cmd, dev, type, id, (void *)&d) < 0) {
+	if (xfsquotactl(cmd, dev, type, id, (void *)d) < 0) {
 		if (errno != ENOENT && errno != ENOSYS && errno != ESRCH &&
 		    cmd == XFS_GETQUOTA)
 			perror("XFS_GETQUOTA");
@@ -85,12 +84,29 @@ dump_file(
 	}
 
 	if (oid) {
-		*oid = d.d_id;
+		*oid = d->d_id;
 		/* Did kernelspace wrap? */
 		if (*oid < id)
 			return 0;
 	}
 
+	return 1;
+}
+
+static int
+dump_file(
+	FILE		*fp,
+	uint		id,
+	uint		*oid,
+	uint		type,
+	char		*dev,
+	int		flags)
+{
+	struct fs_disk_quota d;
+
+	if (!get_dquot(&d, id, oid, type, dev, flags))
+		return 0;
+
 	if (!d.d_blk_softlimit && !d.d_blk_hardlimit &&
 	    !d.d_ino_softlimit && !d.d_ino_hardlimit &&
 	    !d.d_rtb_softlimit && !d.d_rtb_hardlimit)
@@ -329,31 +345,12 @@ report_mount(
 {
 	fs_disk_quota_t	d;
 	time64_t	timer;
-	char		*dev = mount->fs_name;
 	char		c[8], h[8], s[8];
 	uint		qflags;
 	int		count;
-	int		cmd;
 
-	if (flags & GETNEXTQUOTA_FLAG)
-		cmd = XFS_GETNEXTQUOTA;
-	else
-		cmd = XFS_GETQUOTA;
-
-	/* Fall back silently if XFS_GETNEXTQUOTA fails, warn on XFS_GETQUOTA*/
-	if (xfsquotactl(cmd, dev, type, id, (void *)&d) < 0) {
-		if (errno != ENOENT && errno != ENOSYS && errno != ESRCH &&
-		    cmd == XFS_GETQUOTA)
-			perror("XFS_GETQUOTA");
+	if (!get_dquot(&d, id, oid, type, mount->fs_name, flags))
 		return 0;
-	}
-
-	if (oid) {
-		*oid = d.d_id;
-		/* Did kernelspace wrap? */
-		if (* oid < id)
-			return 0;
-	}
 
 	if (flags & TERSE_FLAG) {
 		count = 0;
-- 
2.27.0

[PATCH v3 2/5] xfs_quota: separate get_dquot() and dump_file()

[Andrey Albershteyn]

Separate quota info acquisition from outputting it to file. This
allows upper functions to filter obtained info (e.g. within specific
ID range).

Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
 quota/report.c | 86 ++++++++++++++++++++++++++------------------------
 1 file changed, 45 insertions(+), 41 deletions(-)

diff --git a/quota/report.c b/quota/report.c
index 6994cba6..d5c6f84f 100644
--- a/quota/report.c
+++ b/quota/report.c
@@ -96,39 +96,31 @@ get_dquot(
 static int
 dump_file(
 	FILE		*fp,
-	uint		id,
-	uint		*oid,
-	uint		type,
-	char		*dev,
-	int		flags)
+	struct fs_disk_quota *d,
+	char		*dev)
 {
-	struct fs_disk_quota d;
-
-	if (!get_dquot(&d, id, oid, type, dev, flags))
-		return 0;
-
-	if (!d.d_blk_softlimit && !d.d_blk_hardlimit &&
-	    !d.d_ino_softlimit && !d.d_ino_hardlimit &&
-	    !d.d_rtb_softlimit && !d.d_rtb_hardlimit)
+	if (!d->d_blk_softlimit && !d->d_blk_hardlimit &&
+	    !d->d_ino_softlimit && !d->d_ino_hardlimit &&
+	    !d->d_rtb_softlimit && !d->d_rtb_hardlimit)
 		return 1;
 	fprintf(fp, "fs = %s\n", dev);
 	/* this branch is for backward compatibility reasons */
-	if (d.d_rtb_softlimit || d.d_rtb_hardlimit)
+	if (d->d_rtb_softlimit || d->d_rtb_hardlimit)
 		fprintf(fp, "%-10d %7llu %7llu %7llu %7llu %7llu %7llu\n",
-			d.d_id,
-			(unsigned long long)d.d_blk_softlimit,
-			(unsigned long long)d.d_blk_hardlimit,
-			(unsigned long long)d.d_ino_softlimit,
-			(unsigned long long)d.d_ino_hardlimit,
-			(unsigned long long)d.d_rtb_softlimit,
-			(unsigned long long)d.d_rtb_hardlimit);
+			d->d_id,
+			(unsigned long long)d->d_blk_softlimit,
+			(unsigned long long)d->d_blk_hardlimit,
+			(unsigned long long)d->d_ino_softlimit,
+			(unsigned long long)d->d_ino_hardlimit,
+			(unsigned long long)d->d_rtb_softlimit,
+			(unsigned long long)d->d_rtb_hardlimit);
 	else
 		fprintf(fp, "%-10d %7llu %7llu %7llu %7llu\n",
-			d.d_id,
-			(unsigned long long)d.d_blk_softlimit,
-			(unsigned long long)d.d_blk_hardlimit,
-			(unsigned long long)d.d_ino_softlimit,
-			(unsigned long long)d.d_ino_hardlimit);
+			d->d_id,
+			(unsigned long long)d->d_blk_softlimit,
+			(unsigned long long)d->d_blk_hardlimit,
+			(unsigned long long)d->d_ino_softlimit,
+			(unsigned long long)d->d_ino_hardlimit);
 
 	return 1;
 }
@@ -142,6 +134,7 @@ dump_limits_any_type(
 	uint		upper)
 {
 	fs_path_t	*mount;
+	struct fs_disk_quota d;
 	uint		id = 0, oid;
 
 	if ((mount = fs_table_lookup(dir, FS_MOUNT_POINT)) == NULL) {
@@ -153,46 +146,57 @@ dump_limits_any_type(
 
 	/* Range was specified; query everything in it */
 	if (upper) {
-		for (id = lower; id <= upper; id++)
-			dump_file(fp, id, NULL, type, mount->fs_name, 0);
+		for (id = lower; id <= upper; id++) {
+			get_dquot(&d, id, &oid, type, mount->fs_name, 0);
+			dump_file(fp, &d, mount->fs_name);
+		}
 		return;
 	}
 
 	/* Use GETNEXTQUOTA if it's available */
-	if (dump_file(fp, id, &oid, type, mount->fs_name, GETNEXTQUOTA_FLAG)) {
+	if (get_dquot(&d, id, &oid, type, mount->fs_name, GETNEXTQUOTA_FLAG)) {
+		dump_file(fp, &d, mount->fs_name);
 		id = oid + 1;
-		while (dump_file(fp, id, &oid, type, mount->fs_name,
-				 GETNEXTQUOTA_FLAG))
+		while (get_dquot(&d, id, &oid, type, mount->fs_name,
+					GETNEXTQUOTA_FLAG)) {
+			dump_file(fp, &d, mount->fs_name);
 			id = oid + 1;
+		}
 		return;
-        }
+	}
 
 	/* Otherwise fall back to iterating over each uid/gid/prjid */
 	switch (type) {
 	case XFS_GROUP_QUOTA: {
 			struct group *g;
 			setgrent();
-			while ((g = getgrent()) != NULL)
-				dump_file(fp, g->gr_gid, NULL, type,
-					  mount->fs_name, 0);
+			while ((g = getgrent()) != NULL) {
+				get_dquot(&d, g->gr_gid, NULL, type,
+						mount->fs_name, 0);
+				dump_file(fp, &d, mount->fs_name);
+			}
 			endgrent();
 			break;
 		}
 	case XFS_PROJ_QUOTA: {
 			struct fs_project *p;
 			setprent();
-			while ((p = getprent()) != NULL)
-				dump_file(fp, p->pr_prid, NULL, type,
-					  mount->fs_name, 0);
+			while ((p = getprent()) != NULL) {
+				get_dquot(&d, p->pr_prid, NULL, type,
+						mount->fs_name, 0);
+				dump_file(fp, &d, mount->fs_name);
+			}
 			endprent();
 			break;
 		}
 	case XFS_USER_QUOTA: {
 			struct passwd *u;
 			setpwent();
-			while ((u = getpwent()) != NULL)
-				dump_file(fp, u->pw_uid, NULL, type,
-					  mount->fs_name, 0);
+			while ((u = getpwent()) != NULL) {
+				get_dquot(&d, u->pw_uid, NULL, type,
+						mount->fs_name, 0);
+				dump_file(fp, &d, mount->fs_name);
+			}
 			endpwent();
 			break;
 		}
-- 
2.27.0

[PATCH v3 3/5] xfs_quota: separate get_dquot() and report_mount()

[Andrey Albershteyn]

Separate quota info acquisition from outputting. This allows upper
functions to filter obtained info (e.g. within specific ID range).

Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
 quota/report.c | 178 ++++++++++++++++++++++++++++---------------------
 1 file changed, 103 insertions(+), 75 deletions(-)

diff --git a/quota/report.c b/quota/report.c
index d5c6f84f..8ca154f0 100644
--- a/quota/report.c
+++ b/quota/report.c
@@ -339,30 +339,25 @@ report_header(
 static int
 report_mount(
 	FILE		*fp,
-	uint32_t	id,
+	struct fs_disk_quota *d,
 	char		*name,
-	uint32_t	*oid,
 	uint		form,
 	uint		type,
 	fs_path_t	*mount,
 	uint		flags)
 {
-	fs_disk_quota_t	d;
 	time64_t	timer;
 	char		c[8], h[8], s[8];
 	uint		qflags;
 	int		count;
 
-	if (!get_dquot(&d, id, oid, type, mount->fs_name, flags))
-		return 0;
-
 	if (flags & TERSE_FLAG) {
 		count = 0;
-		if ((form & XFS_BLOCK_QUOTA) && d.d_bcount)
+		if ((form & XFS_BLOCK_QUOTA) && d->d_bcount)
 			count++;
-		if ((form & XFS_INODE_QUOTA) && d.d_icount)
+		if ((form & XFS_INODE_QUOTA) && d->d_icount)
 			count++;
-		if ((form & XFS_RTBLOCK_QUOTA) && d.d_rtbcount)
+		if ((form & XFS_RTBLOCK_QUOTA) && d->d_rtbcount)
 			count++;
 		if (!count)
 			return 0;
@@ -372,19 +367,19 @@ report_mount(
 		report_header(fp, form, type, mount, flags);
 
 	if (flags & NO_LOOKUP_FLAG) {
-		fprintf(fp, "#%-10u", d.d_id);
+		fprintf(fp, "#%-10u", d->d_id);
 	} else {
 		if (name == NULL) {
 			if (type == XFS_USER_QUOTA) {
-				struct passwd	*u = getpwuid(d.d_id);
+				struct passwd	*u = getpwuid(d->d_id);
 				if (u)
 					name = u->pw_name;
 			} else if (type == XFS_GROUP_QUOTA) {
-				struct group	*g = getgrgid(d.d_id);
+				struct group	*g = getgrgid(d->d_id);
 				if (g)
 					name = g->gr_name;
 			} else if (type == XFS_PROJ_QUOTA) {
-				fs_project_t	*p = getprprid(d.d_id);
+				fs_project_t	*p = getprprid(d->d_id);
 				if (p)
 					name = p->pr_name;
 			}
@@ -393,73 +388,73 @@ report_mount(
 		if (name != NULL)
 			fprintf(fp, "%-10s", name);
 		else
-			fprintf(fp, "#%-9u", d.d_id);
+			fprintf(fp, "#%-9u", d->d_id);
 	}
 
 	if (form & XFS_BLOCK_QUOTA) {
-		timer = decode_timer(&d, d.d_btimer, d.d_btimer_hi);
+		timer = decode_timer(d, d->d_btimer, d->d_btimer_hi);
 		qflags = (flags & HUMAN_FLAG);
-		if (d.d_blk_hardlimit && d.d_bcount > d.d_blk_hardlimit)
+		if (d->d_blk_hardlimit && d->d_bcount > d->d_blk_hardlimit)
 			qflags |= LIMIT_FLAG;
-		if (d.d_blk_softlimit && d.d_bcount > d.d_blk_softlimit)
+		if (d->d_blk_softlimit && d->d_bcount > d->d_blk_softlimit)
 			qflags |= QUOTA_FLAG;
 		if (flags & HUMAN_FLAG)
 			fprintf(fp, " %6s %6s %6s  %02d %8s",
-				bbs_to_string(d.d_bcount, c, sizeof(c)),
-				bbs_to_string(d.d_blk_softlimit, s, sizeof(s)),
-				bbs_to_string(d.d_blk_hardlimit, h, sizeof(h)),
-				d.d_bwarns,
+				bbs_to_string(d->d_bcount, c, sizeof(c)),
+				bbs_to_string(d->d_blk_softlimit, s, sizeof(s)),
+				bbs_to_string(d->d_blk_hardlimit, h, sizeof(h)),
+				d->d_bwarns,
 				time_to_string(timer, qflags));
 		else
 			fprintf(fp, " %10llu %10llu %10llu     %02d %9s",
-				(unsigned long long)d.d_bcount >> 1,
-				(unsigned long long)d.d_blk_softlimit >> 1,
-				(unsigned long long)d.d_blk_hardlimit >> 1,
-				d.d_bwarns,
+				(unsigned long long)d->d_bcount >> 1,
+				(unsigned long long)d->d_blk_softlimit >> 1,
+				(unsigned long long)d->d_blk_hardlimit >> 1,
+				d->d_bwarns,
 				time_to_string(timer, qflags));
 	}
 	if (form & XFS_INODE_QUOTA) {
-		timer = decode_timer(&d, d.d_itimer, d.d_itimer_hi);
+		timer = decode_timer(d, d->d_itimer, d->d_itimer_hi);
 		qflags = (flags & HUMAN_FLAG);
-		if (d.d_ino_hardlimit && d.d_icount > d.d_ino_hardlimit)
+		if (d->d_ino_hardlimit && d->d_icount > d->d_ino_hardlimit)
 			qflags |= LIMIT_FLAG;
-		if (d.d_ino_softlimit && d.d_icount > d.d_ino_softlimit)
+		if (d->d_ino_softlimit && d->d_icount > d->d_ino_softlimit)
 			qflags |= QUOTA_FLAG;
 		if (flags & HUMAN_FLAG)
 			fprintf(fp, " %6s %6s %6s  %02d %8s",
-				num_to_string(d.d_icount, c, sizeof(c)),
-				num_to_string(d.d_ino_softlimit, s, sizeof(s)),
-				num_to_string(d.d_ino_hardlimit, h, sizeof(h)),
-				d.d_iwarns,
+				num_to_string(d->d_icount, c, sizeof(c)),
+				num_to_string(d->d_ino_softlimit, s, sizeof(s)),
+				num_to_string(d->d_ino_hardlimit, h, sizeof(h)),
+				d->d_iwarns,
 				time_to_string(timer, qflags));
 		else
 			fprintf(fp, " %10llu %10llu %10llu     %02d %9s",
-				(unsigned long long)d.d_icount,
-				(unsigned long long)d.d_ino_softlimit,
-				(unsigned long long)d.d_ino_hardlimit,
-				d.d_iwarns,
+				(unsigned long long)d->d_icount,
+				(unsigned long long)d->d_ino_softlimit,
+				(unsigned long long)d->d_ino_hardlimit,
+				d->d_iwarns,
 				time_to_string(timer, qflags));
 	}
 	if (form & XFS_RTBLOCK_QUOTA) {
-		timer = decode_timer(&d, d.d_rtbtimer, d.d_rtbtimer_hi);
+		timer = decode_timer(d, d->d_rtbtimer, d->d_rtbtimer_hi);
 		qflags = (flags & HUMAN_FLAG);
-		if (d.d_rtb_hardlimit && d.d_rtbcount > d.d_rtb_hardlimit)
+		if (d->d_rtb_hardlimit && d->d_rtbcount > d->d_rtb_hardlimit)
 			qflags |= LIMIT_FLAG;
-		if (d.d_rtb_softlimit && d.d_rtbcount > d.d_rtb_softlimit)
+		if (d->d_rtb_softlimit && d->d_rtbcount > d->d_rtb_softlimit)
 			qflags |= QUOTA_FLAG;
 		if (flags & HUMAN_FLAG)
 			fprintf(fp, " %6s %6s %6s  %02d %8s",
-				bbs_to_string(d.d_rtbcount, c, sizeof(c)),
-				bbs_to_string(d.d_rtb_softlimit, s, sizeof(s)),
-				bbs_to_string(d.d_rtb_hardlimit, h, sizeof(h)),
-				d.d_rtbwarns,
+				bbs_to_string(d->d_rtbcount, c, sizeof(c)),
+				bbs_to_string(d->d_rtb_softlimit, s, sizeof(s)),
+				bbs_to_string(d->d_rtb_hardlimit, h, sizeof(h)),
+				d->d_rtbwarns,
 				time_to_string(timer, qflags));
 		else
 			fprintf(fp, " %10llu %10llu %10llu     %02d %9s",
-				(unsigned long long)d.d_rtbcount >> 1,
-				(unsigned long long)d.d_rtb_softlimit >> 1,
-				(unsigned long long)d.d_rtb_hardlimit >> 1,
-				d.d_rtbwarns,
+				(unsigned long long)d->d_rtbcount >> 1,
+				(unsigned long long)d->d_rtb_softlimit >> 1,
+				(unsigned long long)d->d_rtb_hardlimit >> 1,
+				d->d_rtbwarns,
 				time_to_string(timer, qflags));
 	}
 	fputc('\n', fp);
@@ -476,30 +471,40 @@ report_user_mount(
 	uint		flags)
 {
 	struct passwd	*u;
+	struct fs_disk_quota	d;
 	uint		id = 0, oid;
 
 	if (upper) {	/* identifier range specified */
 		for (id = lower; id <= upper; id++) {
-			if (report_mount(fp, id, NULL, NULL,
-					form, XFS_USER_QUOTA, mount, flags))
+			if (get_dquot(&d, id, NULL, XFS_USER_QUOTA,
+						mount->fs_name, flags)) {
+				report_mount(fp, &d, NULL, form, XFS_USER_QUOTA,
+						mount, flags);
 				flags |= NO_HEADER_FLAG;
+			}
 		}
-	} else if (report_mount(fp, id, NULL, &oid, form,
-				XFS_USER_QUOTA, mount,
+	} else if (get_dquot(&d, id, &oid, XFS_USER_QUOTA, mount->fs_name,
 				flags|GETNEXTQUOTA_FLAG)) {
+		report_mount(fp, &d, NULL, form, XFS_USER_QUOTA, mount,
+			flags|GETNEXTQUOTA_FLAG);
 		id = oid + 1;
 		flags |= GETNEXTQUOTA_FLAG;
 		flags |= NO_HEADER_FLAG;
-		while (report_mount(fp, id, NULL, &oid, form, XFS_USER_QUOTA,
-				    mount, flags)) {
+		while (get_dquot(&d, id, &oid, XFS_USER_QUOTA, mount->fs_name,
+				flags)) {
+			report_mount(fp, &d, NULL, form, XFS_USER_QUOTA,
+				mount, flags);
 			id = oid + 1;
 		}
 	} else {
 		setpwent();
 		while ((u = getpwent()) != NULL) {
-			if (report_mount(fp, u->pw_uid, u->pw_name, NULL,
-					form, XFS_USER_QUOTA, mount, flags))
+			if (get_dquot(&d, u->pw_uid, NULL, XFS_USER_QUOTA,
+						mount->fs_name, flags)) {
+				report_mount(fp, &d, u->pw_name, form,
+						XFS_USER_QUOTA, mount, flags);
 				flags |= NO_HEADER_FLAG;
+			}
 		}
 		endpwent();
 	}
@@ -518,30 +523,40 @@ report_group_mount(
 	uint		flags)
 {
 	struct group	*g;
+	struct fs_disk_quota	d;
 	uint		id = 0, oid;
 
 	if (upper) {	/* identifier range specified */
 		for (id = lower; id <= upper; id++) {
-			if (report_mount(fp, id, NULL, NULL,
-					form, XFS_GROUP_QUOTA, mount, flags))
+			if (get_dquot(&d, id, NULL, XFS_GROUP_QUOTA,
+						mount->fs_name, flags)) {
+				report_mount(fp, &d, NULL, form,
+						XFS_GROUP_QUOTA, mount, flags);
 				flags |= NO_HEADER_FLAG;
+			}
 		}
-	} else if (report_mount(fp, id, NULL, &oid, form,
-				XFS_GROUP_QUOTA, mount,
-				flags|GETNEXTQUOTA_FLAG)) {
+	} else if (get_dquot(&d, id, &oid, XFS_GROUP_QUOTA,
+				mount->fs_name, flags|GETNEXTQUOTA_FLAG)) {
+		report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount,
+				flags|GETNEXTQUOTA_FLAG);
 		id = oid + 1;
 		flags |= GETNEXTQUOTA_FLAG;
 		flags |= NO_HEADER_FLAG;
-		while (report_mount(fp, id, NULL, &oid, form, XFS_GROUP_QUOTA,
-				    mount, flags)) {
+		while (get_dquot(&d, id, &oid, XFS_GROUP_QUOTA,
+					mount->fs_name, flags)) {
+			report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount,
+					flags);
 			id = oid + 1;
 		}
 	} else {
 		setgrent();
 		while ((g = getgrent()) != NULL) {
-			if (report_mount(fp, g->gr_gid, g->gr_name, NULL,
-					form, XFS_GROUP_QUOTA, mount, flags))
+			if (get_dquot(&d, g->gr_gid, NULL, XFS_GROUP_QUOTA,
+						mount->fs_name, flags)) {
+				report_mount(fp, &d, g->gr_name, form,
+						XFS_GROUP_QUOTA, mount, flags);
 				flags |= NO_HEADER_FLAG;
+			}
 		}
 	}
 	if (flags & NO_HEADER_FLAG)
@@ -559,22 +574,29 @@ report_project_mount(
 	uint		flags)
 {
 	fs_project_t	*p;
+	struct fs_disk_quota	d;
 	uint		id = 0, oid;
 
 	if (upper) {	/* identifier range specified */
 		for (id = lower; id <= upper; id++) {
-			if (report_mount(fp, id, NULL, NULL,
-					form, XFS_PROJ_QUOTA, mount, flags))
+			if (get_dquot(&d, id, NULL, XFS_PROJ_QUOTA,
+						mount->fs_name, flags)) {
+				report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA,
+						mount, flags);
 				flags |= NO_HEADER_FLAG;
+			}
 		}
-	} else if (report_mount(fp, id, NULL, &oid, form,
-				XFS_PROJ_QUOTA, mount,
-				flags|GETNEXTQUOTA_FLAG)) {
+	} else if (get_dquot(&d, id, &oid, XFS_PROJ_QUOTA,
+				mount->fs_name, flags|GETNEXTQUOTA_FLAG)) {
+		report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount,
+				flags|GETNEXTQUOTA_FLAG);
 		id = oid + 1;
 		flags |= GETNEXTQUOTA_FLAG;
 		flags |= NO_HEADER_FLAG;
-		while (report_mount(fp, id, NULL, &oid, form, XFS_PROJ_QUOTA,
-				    mount, flags)) {
+		while (get_dquot(&d, id, &oid, XFS_PROJ_QUOTA,
+					mount->fs_name, flags)) {
+			report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount,
+					flags);
 			id = oid + 1;
 		}
 	} else {
@@ -583,16 +605,22 @@ report_project_mount(
 			 * Print default project quota, even if projid 0
 			 * isn't defined
 			 */
-			if (report_mount(fp, 0, NULL, NULL,
-					form, XFS_PROJ_QUOTA, mount, flags))
+			if (get_dquot(&d, 0, NULL, XFS_PROJ_QUOTA,
+						mount->fs_name, flags)) {
+				report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA,
+						mount, flags);
 				flags |= NO_HEADER_FLAG;
+			}
 		}
 
 		setprent();
 		while ((p = getprent()) != NULL) {
-			if (report_mount(fp, p->pr_prid, p->pr_name, NULL,
-					form, XFS_PROJ_QUOTA, mount, flags))
+			if (get_dquot(&d, p->pr_prid, NULL, XFS_PROJ_QUOTA,
+						mount->fs_name, flags)) {
+				report_mount(fp, &d, p->pr_name, form,
+						XFS_PROJ_QUOTA, mount, flags);
 				flags |= NO_HEADER_FLAG;
+			}
 		}
 		endprent();
 	}
-- 
2.27.0

[PATCH v3 4/5] xfs_quota: utilize XFS_GETNEXTQUOTA for ranged calls in report/dump

[Andrey Albershteyn]

The implementation based on XFS_GETQUOTA call for each ID in range,
specified with -L/-U, is quite slow for wider ranges.

If kernel supports XFS_GETNEXTQUOTA, report_*_mount/dump_any_file
will use that to obtain quota list for the mount. XFS_GETNEXTQUOTA
returns quota of the requested ID and next ID with non-empty quota.

Otherwise, XFS_GETQUOTA will be used for each user/group/project ID
known from password/group/project database.

Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 quota/report.c | 148 ++++++++++++++++---------------------------------
 1 file changed, 49 insertions(+), 99 deletions(-)

diff --git a/quota/report.c b/quota/report.c
index 8ca154f0..2b9577a5 100644
--- a/quota/report.c
+++ b/quota/report.c
@@ -63,7 +63,6 @@ static int
 get_dquot(
 	struct fs_disk_quota *d,
 	uint		id,
-	uint		*oid,
 	uint		type,
 	char		*dev,
 	int		flags)
@@ -83,12 +82,9 @@ get_dquot(
 		return 0;
 	}
 
-	if (oid) {
-		*oid = d->d_id;
-		/* Did kernelspace wrap? */
-		if (*oid < id)
-			return 0;
-	}
+	/* Did kernelspace wrap? */
+	if (d->d_id < id)
+		return 0;
 
 	return 1;
 }
@@ -135,7 +131,7 @@ dump_limits_any_type(
 {
 	fs_path_t	*mount;
 	struct fs_disk_quota d;
-	uint		id = 0, oid;
+	uint		id = lower, flags = 0;
 
 	if ((mount = fs_table_lookup(dir, FS_MOUNT_POINT)) == NULL) {
 		exitcode = 1;
@@ -144,26 +140,16 @@ dump_limits_any_type(
 		return;
 	}
 
-	/* Range was specified; query everything in it */
-	if (upper) {
-		for (id = lower; id <= upper; id++) {
-			get_dquot(&d, id, &oid, type, mount->fs_name, 0);
-			dump_file(fp, &d, mount->fs_name);
-		}
-		return;
+	while (get_dquot(&d, id, type, mount->fs_name,
+				flags | GETNEXTQUOTA_FLAG) &&
+			!(upper && (d.d_id > upper))) {
+		dump_file(fp, &d, mount->fs_name);
+		id = d.d_id + 1;
+		flags |= GETNEXTQUOTA_FLAG;
 	}
 
-	/* Use GETNEXTQUOTA if it's available */
-	if (get_dquot(&d, id, &oid, type, mount->fs_name, GETNEXTQUOTA_FLAG)) {
-		dump_file(fp, &d, mount->fs_name);
-		id = oid + 1;
-		while (get_dquot(&d, id, &oid, type, mount->fs_name,
-					GETNEXTQUOTA_FLAG)) {
-			dump_file(fp, &d, mount->fs_name);
-			id = oid + 1;
-		}
+	if (flags & GETNEXTQUOTA_FLAG)
 		return;
-	}
 
 	/* Otherwise fall back to iterating over each uid/gid/prjid */
 	switch (type) {
@@ -171,7 +157,7 @@ dump_limits_any_type(
 			struct group *g;
 			setgrent();
 			while ((g = getgrent()) != NULL) {
-				get_dquot(&d, g->gr_gid, NULL, type,
+				get_dquot(&d, g->gr_gid, type,
 						mount->fs_name, 0);
 				dump_file(fp, &d, mount->fs_name);
 			}
@@ -182,7 +168,7 @@ dump_limits_any_type(
 			struct fs_project *p;
 			setprent();
 			while ((p = getprent()) != NULL) {
-				get_dquot(&d, p->pr_prid, NULL, type,
+				get_dquot(&d, p->pr_prid, type,
 						mount->fs_name, 0);
 				dump_file(fp, &d, mount->fs_name);
 			}
@@ -193,7 +179,7 @@ dump_limits_any_type(
 			struct passwd *u;
 			setpwent();
 			while ((u = getpwent()) != NULL) {
-				get_dquot(&d, u->pw_uid, NULL, type,
+				get_dquot(&d, u->pw_uid, type,
 						mount->fs_name, 0);
 				dump_file(fp, &d, mount->fs_name);
 			}
@@ -472,34 +458,22 @@ report_user_mount(
 {
 	struct passwd	*u;
 	struct fs_disk_quota	d;
-	uint		id = 0, oid;
+	uint		id = lower;
 
-	if (upper) {	/* identifier range specified */
-		for (id = lower; id <= upper; id++) {
-			if (get_dquot(&d, id, NULL, XFS_USER_QUOTA,
-						mount->fs_name, flags)) {
-				report_mount(fp, &d, NULL, form, XFS_USER_QUOTA,
-						mount, flags);
-				flags |= NO_HEADER_FLAG;
-			}
-		}
-	} else if (get_dquot(&d, id, &oid, XFS_USER_QUOTA, mount->fs_name,
-				flags|GETNEXTQUOTA_FLAG)) {
-		report_mount(fp, &d, NULL, form, XFS_USER_QUOTA, mount,
-			flags|GETNEXTQUOTA_FLAG);
-		id = oid + 1;
+	while (get_dquot(&d, id, XFS_USER_QUOTA, mount->fs_name,
+				flags | GETNEXTQUOTA_FLAG) &&
+			!(upper && (d.d_id > upper))) {
+		report_mount(fp, &d, NULL, form, XFS_USER_QUOTA, mount, flags);
+		id = d.d_id + 1;
 		flags |= GETNEXTQUOTA_FLAG;
 		flags |= NO_HEADER_FLAG;
-		while (get_dquot(&d, id, &oid, XFS_USER_QUOTA, mount->fs_name,
-				flags)) {
-			report_mount(fp, &d, NULL, form, XFS_USER_QUOTA,
-				mount, flags);
-			id = oid + 1;
-		}
-	} else {
+	}
+
+	/* No GETNEXTQUOTA support, iterate over all from password file */
+	if (!(flags & GETNEXTQUOTA_FLAG)) {
 		setpwent();
 		while ((u = getpwent()) != NULL) {
-			if (get_dquot(&d, u->pw_uid, NULL, XFS_USER_QUOTA,
+			if (get_dquot(&d, u->pw_uid, XFS_USER_QUOTA,
 						mount->fs_name, flags)) {
 				report_mount(fp, &d, u->pw_name, form,
 						XFS_USER_QUOTA, mount, flags);
@@ -524,34 +498,22 @@ report_group_mount(
 {
 	struct group	*g;
 	struct fs_disk_quota	d;
-	uint		id = 0, oid;
+	uint		id = lower;
 
-	if (upper) {	/* identifier range specified */
-		for (id = lower; id <= upper; id++) {
-			if (get_dquot(&d, id, NULL, XFS_GROUP_QUOTA,
-						mount->fs_name, flags)) {
-				report_mount(fp, &d, NULL, form,
-						XFS_GROUP_QUOTA, mount, flags);
-				flags |= NO_HEADER_FLAG;
-			}
-		}
-	} else if (get_dquot(&d, id, &oid, XFS_GROUP_QUOTA,
-				mount->fs_name, flags|GETNEXTQUOTA_FLAG)) {
-		report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount,
-				flags|GETNEXTQUOTA_FLAG);
-		id = oid + 1;
+	while (get_dquot(&d, id, XFS_GROUP_QUOTA, mount->fs_name,
+				flags | GETNEXTQUOTA_FLAG) &&
+			!(upper && (d.d_id > upper))) {
+		report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount, flags);
+		id = d.d_id + 1;
 		flags |= GETNEXTQUOTA_FLAG;
 		flags |= NO_HEADER_FLAG;
-		while (get_dquot(&d, id, &oid, XFS_GROUP_QUOTA,
-					mount->fs_name, flags)) {
-			report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount,
-					flags);
-			id = oid + 1;
-		}
-	} else {
+	}
+
+	/* No GETNEXTQUOTA support, iterate over all from password file */
+	if (!(flags & GETNEXTQUOTA_FLAG)) {
 		setgrent();
 		while ((g = getgrent()) != NULL) {
-			if (get_dquot(&d, g->gr_gid, NULL, XFS_GROUP_QUOTA,
+			if (get_dquot(&d, g->gr_gid, XFS_GROUP_QUOTA,
 						mount->fs_name, flags)) {
 				report_mount(fp, &d, g->gr_name, form,
 						XFS_GROUP_QUOTA, mount, flags);
@@ -575,38 +537,26 @@ report_project_mount(
 {
 	fs_project_t	*p;
 	struct fs_disk_quota	d;
-	uint		id = 0, oid;
+	uint		id = lower;
 
-	if (upper) {	/* identifier range specified */
-		for (id = lower; id <= upper; id++) {
-			if (get_dquot(&d, id, NULL, XFS_PROJ_QUOTA,
-						mount->fs_name, flags)) {
-				report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA,
-						mount, flags);
-				flags |= NO_HEADER_FLAG;
-			}
-		}
-	} else if (get_dquot(&d, id, &oid, XFS_PROJ_QUOTA,
-				mount->fs_name, flags|GETNEXTQUOTA_FLAG)) {
-		report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount,
-				flags|GETNEXTQUOTA_FLAG);
-		id = oid + 1;
+	while (get_dquot(&d, id, XFS_PROJ_QUOTA, mount->fs_name,
+				flags | GETNEXTQUOTA_FLAG) &&
+			!(upper && (d.d_id > upper))) {
+		report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount, flags);
+		id = d.d_id + 1;
 		flags |= GETNEXTQUOTA_FLAG;
 		flags |= NO_HEADER_FLAG;
-		while (get_dquot(&d, id, &oid, XFS_PROJ_QUOTA,
-					mount->fs_name, flags)) {
-			report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount,
-					flags);
-			id = oid + 1;
-		}
-	} else {
+	}
+
+	/* No GETNEXTQUOTA support, iterate over all */
+	if (!(flags & GETNEXTQUOTA_FLAG)) {
 		if (!getprprid(0)) {
 			/*
 			 * Print default project quota, even if projid 0
 			 * isn't defined
 			 */
-			if (get_dquot(&d, 0, NULL, XFS_PROJ_QUOTA,
-						mount->fs_name, flags)) {
+			if (get_dquot(&d, 0, XFS_PROJ_QUOTA, mount->fs_name,
+						flags)) {
 				report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA,
 						mount, flags);
 				flags |= NO_HEADER_FLAG;
@@ -615,7 +565,7 @@ report_project_mount(
 
 		setprent();
 		while ((p = getprent()) != NULL) {
-			if (get_dquot(&d, p->pr_prid, NULL, XFS_PROJ_QUOTA,
+			if (get_dquot(&d, p->pr_prid, XFS_PROJ_QUOTA,
 						mount->fs_name, flags)) {
 				report_mount(fp, &d, p->pr_name, form,
 						XFS_PROJ_QUOTA, mount, flags);
-- 
2.27.0

Re: [PATCH v3 4/5] xfs_quota: utilize XFS_GETNEXTQUOTA for ranged calls in report/dump

[Darrick J. Wong]

On Mon, May 02, 2022 at 05:02:10PM +0200, Andrey Albershteyn wrote:
> The implementation based on XFS_GETQUOTA call for each ID in range,
> specified with -L/-U, is quite slow for wider ranges.
> 
> If kernel supports XFS_GETNEXTQUOTA, report_*_mount/dump_any_file
> will use that to obtain quota list for the mount. XFS_GETNEXTQUOTA
> returns quota of the requested ID and next ID with non-empty quota.
> 
> Otherwise, XFS_GETQUOTA will be used for each user/group/project ID
> known from password/group/project database.
> 
> Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com>
> Reviewed-by: Christoph Hellwig <hch@lst.de>

Looks good now,
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

--D

> ---
>  quota/report.c | 148 ++++++++++++++++---------------------------------
>  1 file changed, 49 insertions(+), 99 deletions(-)
> 
> diff --git a/quota/report.c b/quota/report.c
> index 8ca154f0..2b9577a5 100644
> --- a/quota/report.c
> +++ b/quota/report.c
> @@ -63,7 +63,6 @@ static int
>  get_dquot(
>  	struct fs_disk_quota *d,
>  	uint		id,
> -	uint		*oid,
>  	uint		type,
>  	char		*dev,
>  	int		flags)
> @@ -83,12 +82,9 @@ get_dquot(
>  		return 0;
>  	}
>  
> -	if (oid) {
> -		*oid = d->d_id;
> -		/* Did kernelspace wrap? */
> -		if (*oid < id)
> -			return 0;
> -	}
> +	/* Did kernelspace wrap? */
> +	if (d->d_id < id)
> +		return 0;
>  
>  	return 1;
>  }
> @@ -135,7 +131,7 @@ dump_limits_any_type(
>  {
>  	fs_path_t	*mount;
>  	struct fs_disk_quota d;
> -	uint		id = 0, oid;
> +	uint		id = lower, flags = 0;
>  
>  	if ((mount = fs_table_lookup(dir, FS_MOUNT_POINT)) == NULL) {
>  		exitcode = 1;
> @@ -144,26 +140,16 @@ dump_limits_any_type(
>  		return;
>  	}
>  
> -	/* Range was specified; query everything in it */
> -	if (upper) {
> -		for (id = lower; id <= upper; id++) {
> -			get_dquot(&d, id, &oid, type, mount->fs_name, 0);
> -			dump_file(fp, &d, mount->fs_name);
> -		}
> -		return;
> +	while (get_dquot(&d, id, type, mount->fs_name,
> +				flags | GETNEXTQUOTA_FLAG) &&
> +			!(upper && (d.d_id > upper))) {
> +		dump_file(fp, &d, mount->fs_name);
> +		id = d.d_id + 1;
> +		flags |= GETNEXTQUOTA_FLAG;
>  	}
>  
> -	/* Use GETNEXTQUOTA if it's available */
> -	if (get_dquot(&d, id, &oid, type, mount->fs_name, GETNEXTQUOTA_FLAG)) {
> -		dump_file(fp, &d, mount->fs_name);
> -		id = oid + 1;
> -		while (get_dquot(&d, id, &oid, type, mount->fs_name,
> -					GETNEXTQUOTA_FLAG)) {
> -			dump_file(fp, &d, mount->fs_name);
> -			id = oid + 1;
> -		}
> +	if (flags & GETNEXTQUOTA_FLAG)
>  		return;
> -	}
>  
>  	/* Otherwise fall back to iterating over each uid/gid/prjid */
>  	switch (type) {
> @@ -171,7 +157,7 @@ dump_limits_any_type(
>  			struct group *g;
>  			setgrent();
>  			while ((g = getgrent()) != NULL) {
> -				get_dquot(&d, g->gr_gid, NULL, type,
> +				get_dquot(&d, g->gr_gid, type,
>  						mount->fs_name, 0);
>  				dump_file(fp, &d, mount->fs_name);
>  			}
> @@ -182,7 +168,7 @@ dump_limits_any_type(
>  			struct fs_project *p;
>  			setprent();
>  			while ((p = getprent()) != NULL) {
> -				get_dquot(&d, p->pr_prid, NULL, type,
> +				get_dquot(&d, p->pr_prid, type,
>  						mount->fs_name, 0);
>  				dump_file(fp, &d, mount->fs_name);
>  			}
> @@ -193,7 +179,7 @@ dump_limits_any_type(
>  			struct passwd *u;
>  			setpwent();
>  			while ((u = getpwent()) != NULL) {
> -				get_dquot(&d, u->pw_uid, NULL, type,
> +				get_dquot(&d, u->pw_uid, type,
>  						mount->fs_name, 0);
>  				dump_file(fp, &d, mount->fs_name);
>  			}
> @@ -472,34 +458,22 @@ report_user_mount(
>  {
>  	struct passwd	*u;
>  	struct fs_disk_quota	d;
> -	uint		id = 0, oid;
> +	uint		id = lower;
>  
> -	if (upper) {	/* identifier range specified */
> -		for (id = lower; id <= upper; id++) {
> -			if (get_dquot(&d, id, NULL, XFS_USER_QUOTA,
> -						mount->fs_name, flags)) {
> -				report_mount(fp, &d, NULL, form, XFS_USER_QUOTA,
> -						mount, flags);
> -				flags |= NO_HEADER_FLAG;
> -			}
> -		}
> -	} else if (get_dquot(&d, id, &oid, XFS_USER_QUOTA, mount->fs_name,
> -				flags|GETNEXTQUOTA_FLAG)) {
> -		report_mount(fp, &d, NULL, form, XFS_USER_QUOTA, mount,
> -			flags|GETNEXTQUOTA_FLAG);
> -		id = oid + 1;
> +	while (get_dquot(&d, id, XFS_USER_QUOTA, mount->fs_name,
> +				flags | GETNEXTQUOTA_FLAG) &&
> +			!(upper && (d.d_id > upper))) {
> +		report_mount(fp, &d, NULL, form, XFS_USER_QUOTA, mount, flags);
> +		id = d.d_id + 1;
>  		flags |= GETNEXTQUOTA_FLAG;
>  		flags |= NO_HEADER_FLAG;
> -		while (get_dquot(&d, id, &oid, XFS_USER_QUOTA, mount->fs_name,
> -				flags)) {
> -			report_mount(fp, &d, NULL, form, XFS_USER_QUOTA,
> -				mount, flags);
> -			id = oid + 1;
> -		}
> -	} else {
> +	}
> +
> +	/* No GETNEXTQUOTA support, iterate over all from password file */
> +	if (!(flags & GETNEXTQUOTA_FLAG)) {
>  		setpwent();
>  		while ((u = getpwent()) != NULL) {
> -			if (get_dquot(&d, u->pw_uid, NULL, XFS_USER_QUOTA,
> +			if (get_dquot(&d, u->pw_uid, XFS_USER_QUOTA,
>  						mount->fs_name, flags)) {
>  				report_mount(fp, &d, u->pw_name, form,
>  						XFS_USER_QUOTA, mount, flags);
> @@ -524,34 +498,22 @@ report_group_mount(
>  {
>  	struct group	*g;
>  	struct fs_disk_quota	d;
> -	uint		id = 0, oid;
> +	uint		id = lower;
>  
> -	if (upper) {	/* identifier range specified */
> -		for (id = lower; id <= upper; id++) {
> -			if (get_dquot(&d, id, NULL, XFS_GROUP_QUOTA,
> -						mount->fs_name, flags)) {
> -				report_mount(fp, &d, NULL, form,
> -						XFS_GROUP_QUOTA, mount, flags);
> -				flags |= NO_HEADER_FLAG;
> -			}
> -		}
> -	} else if (get_dquot(&d, id, &oid, XFS_GROUP_QUOTA,
> -				mount->fs_name, flags|GETNEXTQUOTA_FLAG)) {
> -		report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount,
> -				flags|GETNEXTQUOTA_FLAG);
> -		id = oid + 1;
> +	while (get_dquot(&d, id, XFS_GROUP_QUOTA, mount->fs_name,
> +				flags | GETNEXTQUOTA_FLAG) &&
> +			!(upper && (d.d_id > upper))) {
> +		report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount, flags);
> +		id = d.d_id + 1;
>  		flags |= GETNEXTQUOTA_FLAG;
>  		flags |= NO_HEADER_FLAG;
> -		while (get_dquot(&d, id, &oid, XFS_GROUP_QUOTA,
> -					mount->fs_name, flags)) {
> -			report_mount(fp, &d, NULL, form, XFS_GROUP_QUOTA, mount,
> -					flags);
> -			id = oid + 1;
> -		}
> -	} else {
> +	}
> +
> +	/* No GETNEXTQUOTA support, iterate over all from password file */
> +	if (!(flags & GETNEXTQUOTA_FLAG)) {
>  		setgrent();
>  		while ((g = getgrent()) != NULL) {
> -			if (get_dquot(&d, g->gr_gid, NULL, XFS_GROUP_QUOTA,
> +			if (get_dquot(&d, g->gr_gid, XFS_GROUP_QUOTA,
>  						mount->fs_name, flags)) {
>  				report_mount(fp, &d, g->gr_name, form,
>  						XFS_GROUP_QUOTA, mount, flags);
> @@ -575,38 +537,26 @@ report_project_mount(
>  {
>  	fs_project_t	*p;
>  	struct fs_disk_quota	d;
> -	uint		id = 0, oid;
> +	uint		id = lower;
>  
> -	if (upper) {	/* identifier range specified */
> -		for (id = lower; id <= upper; id++) {
> -			if (get_dquot(&d, id, NULL, XFS_PROJ_QUOTA,
> -						mount->fs_name, flags)) {
> -				report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA,
> -						mount, flags);
> -				flags |= NO_HEADER_FLAG;
> -			}
> -		}
> -	} else if (get_dquot(&d, id, &oid, XFS_PROJ_QUOTA,
> -				mount->fs_name, flags|GETNEXTQUOTA_FLAG)) {
> -		report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount,
> -				flags|GETNEXTQUOTA_FLAG);
> -		id = oid + 1;
> +	while (get_dquot(&d, id, XFS_PROJ_QUOTA, mount->fs_name,
> +				flags | GETNEXTQUOTA_FLAG) &&
> +			!(upper && (d.d_id > upper))) {
> +		report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount, flags);
> +		id = d.d_id + 1;
>  		flags |= GETNEXTQUOTA_FLAG;
>  		flags |= NO_HEADER_FLAG;
> -		while (get_dquot(&d, id, &oid, XFS_PROJ_QUOTA,
> -					mount->fs_name, flags)) {
> -			report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA, mount,
> -					flags);
> -			id = oid + 1;
> -		}
> -	} else {
> +	}
> +
> +	/* No GETNEXTQUOTA support, iterate over all */
> +	if (!(flags & GETNEXTQUOTA_FLAG)) {
>  		if (!getprprid(0)) {
>  			/*
>  			 * Print default project quota, even if projid 0
>  			 * isn't defined
>  			 */
> -			if (get_dquot(&d, 0, NULL, XFS_PROJ_QUOTA,
> -						mount->fs_name, flags)) {
> +			if (get_dquot(&d, 0, XFS_PROJ_QUOTA, mount->fs_name,
> +						flags)) {
>  				report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA,
>  						mount, flags);
>  				flags |= NO_HEADER_FLAG;
> @@ -615,7 +565,7 @@ report_project_mount(
>  
>  		setprent();
>  		while ((p = getprent()) != NULL) {
> -			if (get_dquot(&d, p->pr_prid, NULL, XFS_PROJ_QUOTA,
> +			if (get_dquot(&d, p->pr_prid, XFS_PROJ_QUOTA,
>  						mount->fs_name, flags)) {
>  				report_mount(fp, &d, p->pr_name, form,
>  						XFS_PROJ_QUOTA, mount, flags);
> -- 
> 2.27.0
> 

[PATCH v3 5/5] xfs_quota: apply -L/-U range limits in uid/gid/pid loops

[Andrey Albershteyn]

In case kernel doesn't support XFS_GETNEXTQUOTA the report/dump
command will fallback to iterating over all known uid/gid/pid.
However, currently it won't take -L/-U range limits into account
(all entities with non-zero qoutas will be outputted). This applies
those limits for fallback case.

Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
 quota/report.c | 40 +++++++++++++++++++++++++++-------------
 1 file changed, 27 insertions(+), 13 deletions(-)

diff --git a/quota/report.c b/quota/report.c
index 2b9577a5..2acf81b8 100644
--- a/quota/report.c
+++ b/quota/report.c
@@ -157,9 +157,11 @@ dump_limits_any_type(
 			struct group *g;
 			setgrent();
 			while ((g = getgrent()) != NULL) {
-				get_dquot(&d, g->gr_gid, type,
-						mount->fs_name, 0);
-				dump_file(fp, &d, mount->fs_name);
+				if (get_dquot(&d, g->gr_gid, type,
+							mount->fs_name, 0) &&
+						!(lower && (d.d_id < lower)) &&
+						!(upper && (d.d_id > upper)))
+					dump_file(fp, &d, mount->fs_name);
 			}
 			endgrent();
 			break;
@@ -168,9 +170,11 @@ dump_limits_any_type(
 			struct fs_project *p;
 			setprent();
 			while ((p = getprent()) != NULL) {
-				get_dquot(&d, p->pr_prid, type,
-						mount->fs_name, 0);
-				dump_file(fp, &d, mount->fs_name);
+				if (get_dquot(&d, p->pr_prid, type,
+							mount->fs_name, 0) &&
+						!(lower && (d.d_id < lower)) &&
+						!(upper && (d.d_id > upper)))
+					dump_file(fp, &d, mount->fs_name);
 			}
 			endprent();
 			break;
@@ -179,9 +183,11 @@ dump_limits_any_type(
 			struct passwd *u;
 			setpwent();
 			while ((u = getpwent()) != NULL) {
-				get_dquot(&d, u->pw_uid, type,
-						mount->fs_name, 0);
-				dump_file(fp, &d, mount->fs_name);
+				if (get_dquot(&d, u->pw_uid, type,
+							mount->fs_name, 0) &&
+						!(lower && (d.d_id < lower)) &&
+						!(upper && (d.d_id > upper)))
+					dump_file(fp, &d, mount->fs_name);
 			}
 			endpwent();
 			break;
@@ -474,7 +480,9 @@ report_user_mount(
 		setpwent();
 		while ((u = getpwent()) != NULL) {
 			if (get_dquot(&d, u->pw_uid, XFS_USER_QUOTA,
-						mount->fs_name, flags)) {
+						mount->fs_name, flags) &&
+					!(lower && (d.d_id < lower)) &&
+					!(upper && (d.d_id > upper))) {
 				report_mount(fp, &d, u->pw_name, form,
 						XFS_USER_QUOTA, mount, flags);
 				flags |= NO_HEADER_FLAG;
@@ -514,7 +522,9 @@ report_group_mount(
 		setgrent();
 		while ((g = getgrent()) != NULL) {
 			if (get_dquot(&d, g->gr_gid, XFS_GROUP_QUOTA,
-						mount->fs_name, flags)) {
+						mount->fs_name, flags) &&
+					!(lower && (d.d_id < lower)) &&
+					!(upper && (d.d_id > upper))) {
 				report_mount(fp, &d, g->gr_name, form,
 						XFS_GROUP_QUOTA, mount, flags);
 				flags |= NO_HEADER_FLAG;
@@ -556,7 +566,9 @@ report_project_mount(
 			 * isn't defined
 			 */
 			if (get_dquot(&d, 0, XFS_PROJ_QUOTA, mount->fs_name,
-						flags)) {
+						flags) &&
+					!(lower && (d.d_id < lower)) &&
+					!(upper && (d.d_id > upper))) {
 				report_mount(fp, &d, NULL, form, XFS_PROJ_QUOTA,
 						mount, flags);
 				flags |= NO_HEADER_FLAG;
@@ -566,7 +578,9 @@ report_project_mount(
 		setprent();
 		while ((p = getprent()) != NULL) {
 			if (get_dquot(&d, p->pr_prid, XFS_PROJ_QUOTA,
-						mount->fs_name, flags)) {
+						mount->fs_name, flags) &&
+					!(lower && (d.d_id < lower)) &&
+					!(upper && (d.d_id > upper))) {
 				report_mount(fp, &d, p->pr_name, form,
 						XFS_PROJ_QUOTA, mount, flags);
 				flags |= NO_HEADER_FLAG;
-- 
2.27.0