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xfs: remove the kuid/kgid conversion wrappers

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Remove the XFS wrappers for converting from and to the kuid/kgid types.
Mostly this means switching to VFS i_{u,g}id_{read,write} helpers, but
in a few spots the calls to the conversion functions is open coded.
To match the use of sb->s_user_ns in the helpers and other file systems,
sb->s_user_ns is also used in the quota code.  The ACL code already does
the conversion in a grotty layering violation in the VFS xattr code,
so it keeps using init_user_ns for the identity mapping.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2020-02-21 08:31:27 -08:00 committed by Darrick J. Wong
parent 542951592c
commit ba8adad5d0
7 changed files with 27 additions and 54 deletions
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8
fs/xfs/libxfs/xfs_inode_buf.c
View File

@ -222,8 +222,8 @@ xfs_inode_from_disk(
}
to->di_format = from->di_format;
inode->i_uid = xfs_uid_to_kuid(be32_to_cpu(from->di_uid));
inode->i_gid = xfs_gid_to_kgid(be32_to_cpu(from->di_gid));
i_uid_write(inode, be32_to_cpu(from->di_uid));
i_gid_write(inode, be32_to_cpu(from->di_gid));
to->di_flushiter = be16_to_cpu(from->di_flushiter);
/*
@ -276,8 +276,8 @@ xfs_inode_to_disk(
to->di_version = from->di_version;
to->di_format = from->di_format;
to->di_uid = cpu_to_be32(xfs_kuid_to_uid(inode->i_uid));
to->di_gid = cpu_to_be32(xfs_kgid_to_gid(inode->i_gid));
to->di_uid = cpu_to_be32(i_uid_read(inode));
to->di_gid = cpu_to_be32(i_gid_read(inode));
to->di_projid_lo = cpu_to_be16(from->di_projid & 0xffff);
to->di_projid_hi = cpu_to_be16(from->di_projid >> 16);

12
fs/xfs/xfs_acl.c
View File

@ -67,10 +67,12 @@ xfs_acl_from_disk(
switch (acl_e->e_tag) {
case ACL_USER:
acl_e->e_uid = xfs_uid_to_kuid(be32_to_cpu(ace->ae_id));
acl_e->e_uid = make_kuid(&init_user_ns,
be32_to_cpu(ace->ae_id));
break;
case ACL_GROUP:
acl_e->e_gid = xfs_gid_to_kgid(be32_to_cpu(ace->ae_id));
acl_e->e_gid = make_kgid(&init_user_ns,
be32_to_cpu(ace->ae_id));
break;
case ACL_USER_OBJ:
case ACL_GROUP_OBJ:
@ -103,10 +105,12 @@ xfs_acl_to_disk(struct xfs_acl *aclp, const struct posix_acl *acl)
ace->ae_tag = cpu_to_be32(acl_e->e_tag);
switch (acl_e->e_tag) {
case ACL_USER:
ace->ae_id = cpu_to_be32(xfs_kuid_to_uid(acl_e->e_uid));
ace->ae_id = cpu_to_be32(
from_kuid(&init_user_ns, acl_e->e_uid));
break;
case ACL_GROUP:
ace->ae_id = cpu_to_be32(xfs_kgid_to_gid(acl_e->e_gid));
ace->ae_id = cpu_to_be32(
from_kgid(&init_user_ns, acl_e->e_gid));
break;
default:
ace->ae_id = cpu_to_be32(ACL_UNDEFINED_ID);

4
fs/xfs/xfs_dquot.c
View File

@ -829,9 +829,9 @@ xfs_qm_id_for_quotatype(
{
switch (type) {
case XFS_DQ_USER:
return xfs_kuid_to_uid(VFS_I(ip)->i_uid);
return i_uid_read(VFS_I(ip));
case XFS_DQ_GROUP:
return xfs_kgid_to_gid(VFS_I(ip)->i_gid);
return i_gid_read(VFS_I(ip));
case XFS_DQ_PROJ:
return ip->i_d.di_projid;
}

4
fs/xfs/xfs_inode_item.c
View File

@ -308,8 +308,8 @@ xfs_inode_to_log_dinode(
to->di_version = from->di_version;
to->di_format = from->di_format;
to->di_uid = xfs_kuid_to_uid(inode->i_uid);
to->di_gid = xfs_kgid_to_gid(inode->i_gid);
to->di_uid = i_uid_read(inode);
to->di_gid = i_gid_read(inode);
to->di_projid_lo = from->di_projid & 0xffff;
to->di_projid_hi = from->di_projid >> 16;

4
fs/xfs/xfs_itable.c
View File

@ -86,8 +86,8 @@ xfs_bulkstat_one_int(
*/
buf->bs_projectid = ip->i_d.di_projid;
buf->bs_ino = ino;
buf->bs_uid = xfs_kuid_to_uid(inode->i_uid);
buf->bs_gid = xfs_kgid_to_gid(inode->i_gid);
buf->bs_uid = i_uid_read(inode);
buf->bs_gid = i_gid_read(inode);
buf->bs_size = dic->di_size;
buf->bs_nlink = inode->i_nlink;

26
fs/xfs/xfs_linux.h
View File

@ -163,32 +163,6 @@ struct xstats {
extern struct xstats xfsstats;
/* Kernel uid/gid conversion. These are used to convert to/from the on disk
* uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
* The conversion here is type only, the value will remain the same since we
* are converting to the init_user_ns. The uid is later mapped to a particular
* user namespace value when crossing the kernel/user boundary.
*/
static inline uint32_t xfs_kuid_to_uid(kuid_t uid)
{
return from_kuid(&init_user_ns, uid);
}
static inline kuid_t xfs_uid_to_kuid(uint32_t uid)
{
return make_kuid(&init_user_ns, uid);
}
static inline uint32_t xfs_kgid_to_gid(kgid_t gid)
{
return from_kgid(&init_user_ns, gid);
}
static inline kgid_t xfs_gid_to_kgid(uint32_t gid)
{
return make_kgid(&init_user_ns, gid);
}
static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
{
return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));

23
fs/xfs/xfs_qm.c
View File

@ -326,8 +326,7 @@ xfs_qm_dqattach_locked(
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
error = xfs_qm_dqattach_one(ip,
xfs_kuid_to_uid(VFS_I(ip)->i_uid),
error = xfs_qm_dqattach_one(ip, i_uid_read(VFS_I(ip)),
XFS_DQ_USER, doalloc, &ip->i_udquot);
if (error)
goto done;
@ -335,8 +334,7 @@ xfs_qm_dqattach_locked(
}
if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
error = xfs_qm_dqattach_one(ip,
xfs_kgid_to_gid(VFS_I(ip)->i_gid),
error = xfs_qm_dqattach_one(ip, i_gid_read(VFS_I(ip)),
XFS_DQ_GROUP, doalloc, &ip->i_gdquot);
if (error)
goto done;
@ -1625,6 +1623,7 @@ xfs_qm_vop_dqalloc(
{
struct xfs_mount *mp = ip->i_mount;
struct inode *inode = VFS_I(ip);
struct user_namespace *user_ns = inode->i_sb->s_user_ns;
struct xfs_dquot *uq = NULL;
struct xfs_dquot *gq = NULL;
struct xfs_dquot *pq = NULL;
@ -1664,7 +1663,7 @@ xfs_qm_vop_dqalloc(
* holding ilock.
*/
xfs_iunlock(ip, lockflags);
error = xfs_qm_dqget(mp, xfs_kuid_to_uid(uid),
error = xfs_qm_dqget(mp, from_kuid(user_ns, uid),
XFS_DQ_USER, true, &uq);
if (error) {
ASSERT(error != -ENOENT);
@ -1688,7 +1687,7 @@ xfs_qm_vop_dqalloc(
if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
if (!gid_eq(inode->i_gid, gid)) {
xfs_iunlock(ip, lockflags);
error = xfs_qm_dqget(mp, xfs_kgid_to_gid(gid),
error = xfs_qm_dqget(mp, from_kgid(user_ns, gid),
XFS_DQ_GROUP, true, &gq);
if (error) {
ASSERT(error != -ENOENT);
@ -1815,8 +1814,7 @@ xfs_qm_vop_chown_reserve(
XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
if (XFS_IS_UQUOTA_ON(mp) && udqp &&
xfs_kuid_to_uid(VFS_I(ip)->i_uid) !=
be32_to_cpu(udqp->q_core.d_id)) {
i_uid_read(VFS_I(ip)) != be32_to_cpu(udqp->q_core.d_id)) {
udq_delblks = udqp;
/*
* If there are delayed allocation blocks, then we have to
@ -1829,8 +1827,7 @@ xfs_qm_vop_chown_reserve(
}
}
if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
xfs_kgid_to_gid(VFS_I(ip)->i_gid) !=
be32_to_cpu(gdqp->q_core.d_id)) {
i_gid_read(VFS_I(ip)) != be32_to_cpu(gdqp->q_core.d_id)) {
gdq_delblks = gdqp;
if (delblks) {
ASSERT(ip->i_gdquot);
@ -1927,16 +1924,14 @@ xfs_qm_vop_create_dqattach(
if (udqp && XFS_IS_UQUOTA_ON(mp)) {
ASSERT(ip->i_udquot == NULL);
ASSERT(xfs_kuid_to_uid(VFS_I(ip)->i_uid) ==
be32_to_cpu(udqp->q_core.d_id));
ASSERT(i_uid_read(VFS_I(ip)) == be32_to_cpu(udqp->q_core.d_id));
ip->i_udquot = xfs_qm_dqhold(udqp);
xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
}
if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
ASSERT(ip->i_gdquot == NULL);
ASSERT(xfs_kgid_to_gid(VFS_I(ip)->i_gid) ==
be32_to_cpu(gdqp->q_core.d_id));
ASSERT(i_gid_read(VFS_I(ip)) == be32_to_cpu(gdqp->q_core.d_id));
ip->i_gdquot = xfs_qm_dqhold(gdqp);
xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);