From 74a8a103789465c4e67f38d1abb5cea770002601 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" <ebiederm@xmission.com> Date: Sun, 16 Sep 2012 02:07:49 -0700 Subject: userns: Convert qutoactl Update the quotactl user space interface to successfull compile with user namespaces support enabled and to hand off quota identifiers to lower layers of the kernel in struct kqid instead of type and qid pairs. The quota on function is not converted because while it takes a quota type and an id. The id is the on disk quota format to use, which is something completely different. The signature of two struct quotactl_ops methods were changed to take struct kqid argumetns get_dqblk and set_dqblk. The dquot, xfs, and ocfs2 implementations of get_dqblk and set_dqblk are minimally changed so that the code continues to work with the change in parameter type. This is the first in a series of changes to always store quota identifiers in the kernel in struct kqid and only use raw type and qid values when interacting with on disk structures or userspace. Always using struct kqid internally makes it hard to miss places that need conversion to or from the kernel internal values. Cc: Jan Kara <jack@suse.cz> Cc: Dave Chinner <david@fromorbit.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Ben Myers <bpm@sgi.com> Cc: Alex Elder <elder@kernel.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> --- fs/gfs2/quota.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'fs/gfs2') diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index a3bde91645c..b3115392d68 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -1469,7 +1469,7 @@ static int gfs2_quota_get_xstate(struct super_block *sb, return 0; } -static int gfs2_get_dqblk(struct super_block *sb, int type, qid_t id, +static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, struct fs_disk_quota *fdq) { struct gfs2_sbd *sdp = sb->s_fs_info; @@ -1477,20 +1477,21 @@ static int gfs2_get_dqblk(struct super_block *sb, int type, qid_t id, struct gfs2_quota_data *qd; struct gfs2_holder q_gh; int error; + int type; memset(fdq, 0, sizeof(struct fs_disk_quota)); if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) return -ESRCH; /* Crazy XFS error code */ - if (type == USRQUOTA) + if (qid.type == USRQUOTA) type = QUOTA_USER; - else if (type == GRPQUOTA) + else if (qid.type == GRPQUOTA) type = QUOTA_GROUP; else return -EINVAL; - error = qd_get(sdp, type, id, &qd); + error = qd_get(sdp, type, from_kqid(&init_user_ns, qid), &qd); if (error) return error; error = do_glock(qd, FORCE, &q_gh); @@ -1500,7 +1501,7 @@ static int gfs2_get_dqblk(struct super_block *sb, int type, qid_t id, qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; fdq->d_version = FS_DQUOT_VERSION; fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA; - fdq->d_id = id; + fdq->d_id = from_kqid(&init_user_ns, qid); fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; @@ -1514,7 +1515,7 @@ out: /* GFS2 only supports a subset of the XFS fields */ #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) -static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, +static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, struct fs_disk_quota *fdq) { struct gfs2_sbd *sdp = sb->s_fs_info; @@ -1526,11 +1527,12 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, int alloc_required; loff_t offset; int error; + int type; if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) return -ESRCH; /* Crazy XFS error code */ - switch(type) { + switch(qid.type) { case USRQUOTA: type = QUOTA_USER; if (fdq->d_flags != FS_USER_QUOTA) @@ -1547,10 +1549,10 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, if (fdq->d_fieldmask & ~GFS2_FIELDMASK) return -EINVAL; - if (fdq->d_id != id) + if (fdq->d_id != from_kqid(&init_user_ns, qid)) return -EINVAL; - error = qd_get(sdp, type, id, &qd); + error = qd_get(sdp, type, from_kqid(&init_user_ns, qid), &qd); if (error) return error; -- cgit v1.2.3-18-g5258