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Remove znode's z_uid/z_gid member 

Remove duplicate z_uid/z_gid member which are also held in the
generic vfs inode struct. This is done by first removing the members
from struct znode and then using the KUID_TO_SUID/KGID_TO_SGID
macros to access the respective member from struct inode. In cases
where the uid/gids are being marshalled from/to disk, use the newly
introduced zfs_(uid|gid)_(read|write) functions to properly
save the uids rather than the internal kernel representation.

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4685
Issue #227
This commit is contained in:
Nikolay Borisov 2016-05-22 14:15:57 +03:00 committed by Brian Behlendorf
parent 82a1b2d628
commit 2c6abf15ff
10 changed files with 69 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
include/sys/trace_acl.h
View File

@ -31,6 +31,7 @@
#define _TRACE_ACL_H
#include <linux/tracepoint.h>
#include <linux/vfs_compat.h>
#include <sys/types.h>
/*
@ -56,8 +57,6 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
__field(uint64_t, z_mapcnt)
__field(uint64_t, z_size)
__field(uint64_t, z_pflags)
__field(uint64_t, z_uid)
__field(uint64_t, z_gid)
__field(uint32_t, z_sync_cnt)
__field(mode_t, z_mode)
__field(boolean_t, z_is_sa)
@ -65,6 +64,8 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
__field(boolean_t, z_is_ctldir)
__field(boolean_t, z_is_stale)
__field(uint32_t, i_uid)
__field(uint32_t, i_gid)
__field(unsigned long, i_ino)
__field(unsigned int, i_nlink)
__field(u64, i_version)
@ -91,8 +92,6 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
__entry->z_mapcnt = zn->z_mapcnt;
__entry->z_size = zn->z_size;
__entry->z_pflags = zn->z_pflags;
__entry->z_uid = zn->z_uid;
__entry->z_gid = zn->z_gid;
__entry->z_sync_cnt = zn->z_sync_cnt;
__entry->z_mode = zn->z_mode;
__entry->z_is_sa = zn->z_is_sa;
@ -100,6 +99,8 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
__entry->z_is_ctldir = zn->z_is_ctldir;
__entry->z_is_stale = zn->z_is_stale;
__entry->i_uid = zfs_uid_read(ZTOI(zn));
__entry->i_gid = zfs_gid_read(ZTOI(zn));
__entry->i_ino = zn->z_inode.i_ino;
__entry->i_nlink = zn->z_inode.i_nlink;
__entry->i_version = zn->z_inode.i_version;
@ -118,22 +119,22 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
TP_printk("zn { id %llu unlinked %u atime_dirty %u "
"zn_prefetch %u moved %u blksz %u seq %u "
"mapcnt %llu size %llu pflags %llu "
"uid %llu gid %llu sync_cnt %u mode 0x%x is_sa %d "
"sync_cnt %u mode 0x%x is_sa %d "
"is_mapped %d is_ctldir %d is_stale %d inode { "
"ino %lu nlink %u version %llu size %lli blkbits %u "
"bytes %u mode 0x%x generation %x } } ace { type %u "
"flags %u access_mask %u } mask_matched %u",
"uid %u gid %u ino %lu nlink %u version %llu size %lli "
"blkbits %u bytes %u mode 0x%x generation %x } } "
"ace { type %u flags %u access_mask %u } mask_matched %u",
__entry->z_id, __entry->z_unlinked, __entry->z_atime_dirty,
__entry->z_zn_prefetch, __entry->z_moved, __entry->z_blksz,
__entry->z_seq, __entry->z_mapcnt, __entry->z_size,
__entry->z_pflags, __entry->z_uid,
__entry->z_gid, __entry->z_sync_cnt, __entry->z_mode,
__entry->z_pflags, __entry->z_sync_cnt, __entry->z_mode,
__entry->z_is_sa, __entry->z_is_mapped,
__entry->z_is_ctldir, __entry->z_is_stale, __entry->i_ino,
__entry->i_nlink, __entry->i_version, __entry->i_size,
__entry->i_blkbits, __entry->i_bytes, __entry->i_mode,
__entry->i_generation, __entry->z_type, __entry->z_flags,
__entry->z_access_mask, __entry->mask_matched)
__entry->z_is_ctldir, __entry->z_is_stale, __entry->i_uid,
__entry->i_gid, __entry->i_ino, __entry->i_nlink,
__entry->i_version, __entry->i_size, __entry->i_blkbits,
__entry->i_bytes, __entry->i_mode, __entry->i_generation,
__entry->z_type, __entry->z_flags, __entry->z_access_mask,
__entry->mask_matched)
);
#define DEFINE_ACE_EVENT(name) \

2
include/sys/zfs_znode.h
View File

@ -188,8 +188,6 @@ typedef struct znode {
uint64_t z_dnodesize; /* dnode size */
uint64_t z_size; /* file size (cached) */
uint64_t z_pflags; /* pflags (cached) */
uint64_t z_uid; /* uid fuid (cached) */
uint64_t z_gid; /* gid fuid (cached) */
uint32_t z_sync_cnt; /* synchronous open count */
mode_t z_mode; /* mode (cached) */
kmutex_t z_acl_lock; /* acl data lock */

27
module/zfs/zfs_acl.c
View File

@ -53,6 +53,7 @@
#include <sys/zap.h>
#include <sys/sa.h>
#include <sys/trace_acl.h>
#include <sys/zpl.h>
#include "fs/fs_subr.h"
#define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE
@ -1166,7 +1167,8 @@ zfs_acl_chown_setattr(znode_t *zp)
error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE);
if (error == 0 && aclp->z_acl_count > 0)
zp->z_mode = zfs_mode_compute(zp->z_mode, aclp,
&zp->z_pflags, zp->z_uid, zp->z_gid);
&zp->z_pflags, KUID_TO_SUID(ZTOI(zp)->i_uid),
KGID_TO_SGID(ZTOI(zp)->i_gid));
/*
* Some ZFS implementations (ZEVO) create neither a ZNODE_ACL
@ -1324,7 +1326,7 @@ zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx)
mode = zp->z_mode;
mode = zfs_mode_compute(mode, aclp, &zp->z_pflags,
zp->z_uid, zp->z_gid);
zfs_uid_read(ZTOI(zp)), zfs_gid_read(ZTOI(zp)));
zp->z_mode = mode;
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL,
@ -1778,7 +1780,7 @@ zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
(uint64_t)vap->va_gid,
cr, ZFS_GROUP, &acl_ids->z_fuidp);
gid = vap->va_gid;
if (acl_ids->z_fgid != dzp->z_gid &&
if (acl_ids->z_fgid != KGID_TO_SGID(ZTOI(dzp)->i_gid) &&
!groupmember(vap->va_gid, cr) &&
secpolicy_vnode_create_gid(cr) != 0)
acl_ids->z_fgid = 0;
@ -1788,7 +1790,8 @@ zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
char *domain;
uint32_t rid;
acl_ids->z_fgid = dzp->z_gid;
acl_ids->z_fgid = KGID_TO_SGID(
ZTOI(dzp)->i_gid);
gid = zfs_fuid_map_id(zsb, acl_ids->z_fgid,
cr, ZFS_GROUP);
@ -2340,7 +2343,8 @@ zfs_has_access(znode_t *zp, cred_t *cr)
if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) {
uid_t owner;
owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER);
owner = zfs_fuid_map_id(ZTOZSB(zp),
KUID_TO_SUID(ZTOI(zp)->i_uid), cr, ZFS_OWNER);
return (secpolicy_vnode_any_access(cr, ZTOI(zp), owner) == 0);
}
return (B_TRUE);
@ -2418,12 +2422,13 @@ zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
return (0);
}
if (FUID_INDEX(zdp->z_uid) != 0 || FUID_INDEX(zdp->z_gid) != 0) {
if (KUID_TO_SUID(ZTOI(zdp)->i_uid) != 0 ||
KGID_TO_SGID(ZTOI(zdp)->i_gid) != 0) {
mutex_exit(&zdp->z_acl_lock);
goto slow;
}
if (uid == zdp->z_uid) {
if (uid == KUID_TO_SUID(ZTOI(zdp)->i_uid)) {
owner = B_TRUE;
if (zdp->z_mode & S_IXUSR) {
mutex_exit(&zdp->z_acl_lock);
@ -2433,7 +2438,7 @@ zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr)
goto slow;
}
}
if (groupmember(zdp->z_gid, cr)) {
if (groupmember(KGID_TO_SGID(ZTOI(zdp)->i_gid), cr)) {
groupmbr = B_TRUE;
if (zdp->z_mode & S_IXGRP) {
mutex_exit(&zdp->z_acl_lock);
@ -2513,7 +2518,8 @@ zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr)
}
}
owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER);
owner = zfs_fuid_map_id(ZTOZSB(zp), KUID_TO_SUID(ZTOI(zp)->i_uid),
cr, ZFS_OWNER);
/*
* Map the bits required to the standard inode flags
* S_IRUSR|S_IWUSR|S_IXUSR in the needed_bits. Map the bits
@ -2642,7 +2648,8 @@ zfs_delete_final_check(znode_t *zp, znode_t *dzp,
int error;
uid_t downer;
downer = zfs_fuid_map_id(ZTOZSB(dzp), dzp->z_uid, cr, ZFS_OWNER);
downer = zfs_fuid_map_id(ZTOZSB(dzp), KUID_TO_SUID(ZTOI(dzp)->i_uid),
cr, ZFS_OWNER);
error = secpolicy_vnode_access2(cr, ZTOI(dzp),
downer, available_perms, S_IWUSR|S_IXUSR);

2
module/zfs/zfs_ctldir.c
View File

@ -479,8 +479,6 @@ zfsctl_inode_alloc(zfs_sb_t *zsb, uint64_t id,
zp->z_mapcnt = 0;
zp->z_size = 0;
zp->z_pflags = 0;
zp->z_uid = 0;
zp->z_gid = 0;
zp->z_mode = 0;
zp->z_sync_cnt = 0;
zp->z_is_mapped = B_FALSE;

6
module/zfs/zfs_dir.c
View File

@ -1104,8 +1104,10 @@ zfs_sticky_remove_access(znode_t *zdp, znode_t *zp, cred_t *cr)
if ((zdp->z_mode & S_ISVTX) == 0)
return (0);
downer = zfs_fuid_map_id(zsb, zdp->z_uid, cr, ZFS_OWNER);
fowner = zfs_fuid_map_id(zsb, zp->z_uid, cr, ZFS_OWNER);
downer = zfs_fuid_map_id(zsb, KUID_TO_SUID(ZTOI(zdp)->i_uid),
cr, ZFS_OWNER);
fowner = zfs_fuid_map_id(zsb, KUID_TO_SUID(ZTOI(zp)->i_uid),
cr, ZFS_OWNER);
if ((uid = crgetuid(cr)) == downer || uid == fowner ||
(S_ISDIR(ZTOI(zp)->i_mode) &&

6
module/zfs/zfs_fuid.c
View File

@ -387,8 +387,10 @@ zfs_fuid_find_by_idx(zfs_sb_t *zsb, uint32_t idx)
void
zfs_fuid_map_ids(znode_t *zp, cred_t *cr, uid_t *uidp, uid_t *gidp)
{
*uidp = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER);
*gidp = zfs_fuid_map_id(ZTOZSB(zp), zp->z_gid, cr, ZFS_GROUP);
*uidp = zfs_fuid_map_id(ZTOZSB(zp), KUID_TO_SUID(ZTOI(zp)->i_uid),
cr, ZFS_OWNER);
*gidp = zfs_fuid_map_id(ZTOZSB(zp), KGID_TO_SGID(ZTOI(zp)->i_gid),
cr, ZFS_GROUP);
}
uid_t

12
module/zfs/zfs_log.c
View File

@ -282,13 +282,13 @@ zfs_log_create(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
/* Store dnode slot count in 8 bits above object id. */
LR_FOID_SET_SLOTS(lr->lr_foid, zp->z_dnodesize >> DNODE_SHIFT);
lr->lr_mode = zp->z_mode;
if (!IS_EPHEMERAL(zp->z_uid)) {
lr->lr_uid = (uint64_t)zp->z_uid;
if (!IS_EPHEMERAL(KUID_TO_SUID(ZTOI(zp)->i_uid))) {
lr->lr_uid = (uint64_t)KUID_TO_SUID(ZTOI(zp)->i_uid);
} else {
lr->lr_uid = fuidp->z_fuid_owner;
}
if (!IS_EPHEMERAL(zp->z_gid)) {
lr->lr_gid = (uint64_t)zp->z_gid;
if (!IS_EPHEMERAL(KGID_TO_SGID(ZTOI(zp)->i_gid))) {
lr->lr_gid = (uint64_t)KGID_TO_SGID(ZTOI(zp)->i_gid);
} else {
lr->lr_gid = fuidp->z_fuid_group;
}
@ -407,8 +407,8 @@ zfs_log_symlink(zilog_t *zilog, dmu_tx_t *tx, uint64_t txtype,
lr = (lr_create_t *)&itx->itx_lr;
lr->lr_doid = dzp->z_id;
lr->lr_foid = zp->z_id;
lr->lr_uid = zp->z_uid;
lr->lr_gid = zp->z_gid;
lr->lr_uid = KUID_TO_SUID(ZTOI(zp)->i_uid);
lr->lr_gid = KGID_TO_SGID(ZTOI(zp)->i_gid);
lr->lr_mode = zp->z_mode;
(void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(ZTOZSB(zp)), &lr->lr_gen,
sizeof (uint64_t));

3
module/zfs/zfs_vfsops.c
View File

@ -627,10 +627,11 @@ zfs_owner_overquota(zfs_sb_t *zsb, znode_t *zp, boolean_t isgroup)
{
uint64_t fuid;
uint64_t quotaobj;
struct inode *ip = ZTOI(zp);
quotaobj = isgroup ? zsb->z_groupquota_obj : zsb->z_userquota_obj;
fuid = isgroup ? zp->z_gid : zp->z_uid;
fuid = isgroup ? KGID_TO_SGID(ip->i_gid) : KUID_TO_SUID(ip->i_uid);
if (quotaobj == 0 || zsb->z_replay)
return (B_FALSE);

18
module/zfs/zfs_vnops.c
View File

@ -602,6 +602,7 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
int count = 0;
sa_bulk_attr_t bulk[4];
uint64_t mtime[2], ctime[2];
uint32_t uid;
ASSERTV(int iovcnt = uio->uio_iovcnt);
/*
@ -862,11 +863,12 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
* user 0 is not an ephemeral uid.
*/
mutex_enter(&zp->z_acl_lock);
uid = KUID_TO_SUID(ip->i_uid);
if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) |
(S_IXUSR >> 6))) != 0 &&
(zp->z_mode & (S_ISUID | S_ISGID)) != 0 &&
secpolicy_vnode_setid_retain(cr,
(zp->z_mode & S_ISUID) != 0 && zp->z_uid == 0) != 0) {
((zp->z_mode & S_ISUID) != 0 && uid == 0)) != 0) {
uint64_t newmode;
zp->z_mode &= ~(S_ISUID | S_ISGID);
newmode = zp->z_mode;
@ -2844,7 +2846,7 @@ top:
if (mask & ATTR_UID) {
new_uid = zfs_fuid_create(zsb,
(uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp);
if (new_uid != zp->z_uid &&
if (new_uid != KUID_TO_SUID(ZTOI(zp)->i_uid) &&
zfs_fuid_overquota(zsb, B_FALSE, new_uid)) {
if (attrzp)
iput(ZTOI(attrzp));
@ -2856,7 +2858,7 @@ top:
if (mask & ATTR_GID) {
new_gid = zfs_fuid_create(zsb, (uint64_t)vap->va_gid,
cr, ZFS_GROUP, &fuidp);
if (new_gid != zp->z_gid &&
if (new_gid != KGID_TO_SGID(ZTOI(zp)->i_gid) &&
zfs_fuid_overquota(zsb, B_TRUE, new_gid)) {
if (attrzp)
iput(ZTOI(attrzp));
@ -2950,24 +2952,24 @@ top:
if (mask & ATTR_UID) {
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL,
&new_uid, sizeof (new_uid));
zp->z_uid = new_uid;
ZTOI(zp)->i_uid = SUID_TO_KUID(new_uid);
if (attrzp) {
SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
SA_ZPL_UID(zsb), NULL, &new_uid,
sizeof (new_uid));
attrzp->z_uid = new_uid;
ZTOI(attrzp)->i_uid = SUID_TO_KUID(new_uid);
}
}
if (mask & ATTR_GID) {
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zsb),
NULL, &new_gid, sizeof (new_gid));
zp->z_gid = new_gid;
ZTOI(zp)->i_gid = SGID_TO_KGID(new_gid);
if (attrzp) {
SA_ADD_BULK_ATTR(xattr_bulk, xattr_count,
SA_ZPL_GID(zsb), NULL, &new_gid,
sizeof (new_gid));
attrzp->z_gid = new_gid;
ZTOI(attrzp)->i_gid = SGID_TO_KGID(new_gid);
}
}
if (!(mask & ATTR_MODE)) {
@ -3847,7 +3849,7 @@ zfs_link(struct inode *tdip, struct inode *sip, char *name, cred_t *cr,
return (SET_ERROR(EINVAL));
}
owner = zfs_fuid_map_id(zsb, szp->z_uid, cr, ZFS_OWNER);
owner = zfs_fuid_map_id(zsb, KUID_TO_SUID(sip->i_uid), cr, ZFS_OWNER);
if (owner != crgetuid(cr) && secpolicy_basic_link(cr) != 0) {
ZFS_EXIT(zsb);
return (SET_ERROR(EPERM));

16
module/zfs/zfs_znode.c
View File

@ -533,8 +533,6 @@ zfs_inode_update_impl(znode_t *zp, boolean_t new)
dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &blksize, &i_blocks);
spin_lock(&ip->i_lock);
ip->i_uid = SUID_TO_KUID(zp->z_uid);
ip->i_gid = SGID_TO_KGID(zp->z_gid);
ip->i_mode = zp->z_mode;
zfs_set_inode_flags(zp, ip);
ip->i_blkbits = SPA_MINBLOCKSHIFT;
@ -582,6 +580,7 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz,
uint64_t parent;
uint64_t tmp_gen;
uint64_t links;
uint64_t z_uid, z_gid;
sa_bulk_attr_t bulk[8];
int count = 0;
@ -621,8 +620,8 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz,
&zp->z_pflags, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zsb), NULL,
&parent, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL, &zp->z_uid, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zsb), NULL, &zp->z_gid, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL, &z_uid, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zsb), NULL, &z_gid, 8);
if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count) != 0 ||
tmp_gen == 0) {
@ -636,6 +635,8 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz,
zp->z_mode = mode;
ip->i_generation = (uint32_t)tmp_gen;
set_nlink(ip, (uint32_t)links);
zfs_uid_write(ip, z_uid);
zfs_gid_write(ip, z_gid);
ip->i_ino = obj;
zfs_inode_update_new(zp);
@ -1159,6 +1160,7 @@ zfs_rezget(znode_t *zp)
int err;
int count = 0;
uint64_t gen;
uint64_t z_uid, z_gid;
znode_hold_t *zh;
/*
@ -1216,9 +1218,9 @@ zfs_rezget(znode_t *zp)
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL,
&zp->z_pflags, sizeof (zp->z_pflags));
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL,
&zp->z_uid, sizeof (zp->z_uid));
&z_uid, sizeof (z_uid));
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zsb), NULL,
&zp->z_gid, sizeof (zp->z_gid));
&z_gid, sizeof (z_gid));
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL,
&mode, sizeof (mode));
@ -1229,6 +1231,8 @@ zfs_rezget(znode_t *zp)
}
zp->z_mode = mode;
zfs_uid_write(ZTOI(zp), z_uid);
zfs_gid_write(ZTOI(zp), z_gid);
if (gen != ZTOI(zp)->i_generation) {
zfs_znode_dmu_fini(zp);