/*
* Add a FUID node to the list of fuid's being created for this
* ACL
*
* If ACL has multiple domains, then keep only one copy of each unique
* domain.
*/
static void
zfs_fuid_node_add(zfs_fuid_info_t **fuidpp, const char *domain, uint32_t rid,
uint64_t idx, uint64_t id, zfs_fuid_type_t type)
{
zfs_fuid_t *fuid;
zfs_fuid_domain_t *fuid_domain;
zfs_fuid_info_t *fuidp;
uint64_t fuididx;
boolean_t found = B_FALSE;
if (*fuidpp == NULL)
*fuidpp = zfs_fuid_info_alloc();
fuidp = *fuidpp;
/*
* First find fuid domain index in linked list
*
* If one isn't found then create an entry.
*/
for (fuididx = 1, fuid_domain = list_head(&fuidp->z_domains);
fuid_domain; fuid_domain = list_next(&fuidp->z_domains,
fuid_domain), fuididx++) {
if (idx == fuid_domain->z_domidx) {
found = B_TRUE;
break;
}
}
if (!found) {
fuid_domain = kmem_alloc(sizeof (zfs_fuid_domain_t), KM_SLEEP);
fuid_domain->z_domain = domain;
fuid_domain->z_domidx = idx;
list_insert_tail(&fuidp->z_domains, fuid_domain);
fuidp->z_domain_str_sz += strlen(domain) + 1;
fuidp->z_domain_cnt++;
}
if (type == ZFS_ACE_USER || type == ZFS_ACE_GROUP) {
/*
* Now allocate fuid entry and add it on the end of the list
*/
fuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP);
fuid->z_id = id;
fuid->z_domidx = idx;
fuid->z_logfuid = FUID_ENCODE(fuididx, rid);
list_insert_tail(&fuidp->z_fuids, fuid);
fuidp->z_fuid_cnt++;
} else {
if (type == ZFS_OWNER)
fuidp->z_fuid_owner = FUID_ENCODE(fuididx, rid);
else
fuidp->z_fuid_group = FUID_ENCODE(fuididx, rid);
}
}
/*
* Create a file system FUID, based on information in the users cred
*/
uint64_t
zfs_fuid_create_cred(zfsvfs_t *zfsvfs, zfs_fuid_type_t type,
dmu_tx_t *tx, cred_t *cr, zfs_fuid_info_t **fuidp)
{
uint64_t idx;
ksid_t *ksid;
uint32_t rid;
char *kdomain;
const char *domain;
uid_t id;
VERIFY(type == ZFS_OWNER || type == ZFS_GROUP);
if (type == ZFS_OWNER)
id = crgetuid(cr);
else
id = crgetgid(cr);
if (!zfsvfs->z_use_fuids || !IS_EPHEMERAL(id))
return ((uint64_t)id);
ksid = crgetsid(cr, (type == ZFS_OWNER) ? KSID_OWNER : KSID_GROUP);
VERIFY(ksid != NULL);
rid = ksid_getrid(ksid);
domain = ksid_getdomain(ksid);
idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, tx);
zfs_fuid_node_add(fuidp, kdomain, rid, idx, id, type);
return (FUID_ENCODE(idx, rid));
}
/*
* buf must be big enough (eg, 32 bytes)
*/
static int
id_to_fuidstr(zfs_sb_t *zsb, const char *domain, uid_t rid,
char *buf, boolean_t addok)
{
uint64_t fuid;
int domainid = 0;
if (domain && domain[0]) {
domainid = zfs_fuid_find_by_domain(zsb, domain, NULL, addok);
if (domainid == -1)
return (SET_ERROR(ENOENT));
}
fuid = FUID_ENCODE(domainid, rid);
(void) sprintf(buf, "%llx", (longlong_t)fuid);
return (0);
}
/*
* Create a file system FUID, based on information in the users cred
*
* If cred contains KSID_OWNER then it should be used to determine
* the uid otherwise cred's uid will be used. By default cred's gid
* is used unless it's an ephemeral ID in which case KSID_GROUP will
* be used if it exists.
*/
uint64_t
zfs_fuid_create_cred(zfsvfs_t *zfsvfs, zfs_fuid_type_t type,
cred_t *cr, zfs_fuid_info_t **fuidp)
{
uint64_t idx;
ksid_t *ksid;
uint32_t rid;
char *kdomain;
const char *domain;
uid_t id;
VERIFY(type == ZFS_OWNER || type == ZFS_GROUP);
ksid = crgetsid(cr, (type == ZFS_OWNER) ? KSID_OWNER : KSID_GROUP);
if (!zfsvfs->z_use_fuids || (ksid == NULL)) {
id = (type == ZFS_OWNER) ? crgetuid(cr) : crgetgid(cr);
if (IS_EPHEMERAL(id))
return ((type == ZFS_OWNER) ? UID_NOBODY : GID_NOBODY);
return ((uint64_t)id);
}
/*
* ksid is present and FUID is supported
*/
id = (type == ZFS_OWNER) ? ksid_getid(ksid) : crgetgid(cr);
if (!IS_EPHEMERAL(id))
return ((uint64_t)id);
if (type == ZFS_GROUP)
id = ksid_getid(ksid);
rid = ksid_getrid(ksid);
domain = ksid_getdomain(ksid);
idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE);
zfs_fuid_node_add(fuidp, kdomain, rid, idx, id, type);
return (FUID_ENCODE(idx, rid));
}
/*
* Create a file system FUID for an ACL ace
* or a chown/chgrp of the file.
* This is similar to zfs_fuid_create_cred, except that
* we can't find the domain + rid information in the
* cred. Instead we have to query Winchester for the
* domain and rid.
*
* During replay operations the domain+rid information is
* found in the zfs_fuid_info_t that the replay code has
* attached to the zfsvfs of the file system.
*/
uint64_t
zfs_fuid_create(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr,
zfs_fuid_type_t type, dmu_tx_t *tx, zfs_fuid_info_t **fuidpp)
{
const char *domain;
char *kdomain;
uint32_t fuid_idx = FUID_INDEX(id);
uint32_t rid;
idmap_stat status;
uint64_t idx;
boolean_t is_replay = (zfsvfs->z_assign >= TXG_INITIAL);
zfs_fuid_t *zfuid = NULL;
zfs_fuid_info_t *fuidp;
/*
* If POSIX ID, or entry is already a FUID then
* just return the id
*
* We may also be handed an already FUID'ized id via
* chmod.
*/
if (!zfsvfs->z_use_fuids || !IS_EPHEMERAL(id) || fuid_idx != 0)
return (id);
if (is_replay) {
fuidp = zfsvfs->z_fuid_replay;
/*
* If we are passed an ephemeral id, but no
* fuid_info was logged then return NOBODY.
* This is most likely a result of idmap service
* not being available.
*/
if (fuidp == NULL)
return (UID_NOBODY);
switch (type) {
case ZFS_ACE_USER:
case ZFS_ACE_GROUP:
zfuid = list_head(&fuidp->z_fuids);
rid = FUID_RID(zfuid->z_logfuid);
idx = FUID_INDEX(zfuid->z_logfuid);
break;
case ZFS_OWNER:
rid = FUID_RID(fuidp->z_fuid_owner);
idx = FUID_INDEX(fuidp->z_fuid_owner);
break;
case ZFS_GROUP:
rid = FUID_RID(fuidp->z_fuid_group);
idx = FUID_INDEX(fuidp->z_fuid_group);
break;
};
domain = fuidp->z_domain_table[idx -1];
} else {
if (type == ZFS_OWNER || type == ZFS_ACE_USER)
status = kidmap_getsidbyuid(crgetzone(cr), id,
&domain, &rid);
else
status = kidmap_getsidbygid(crgetzone(cr), id,
&domain, &rid);
if (status != 0) {
/*
* When returning nobody we will need to
* make a dummy fuid table entry for logging
* purposes.
*/
rid = UID_NOBODY;
domain = "";
}
}
idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, tx);
if (!is_replay)
zfs_fuid_node_add(fuidpp, kdomain, rid, idx, id, type);
else if (zfuid != NULL) {
list_remove(&fuidp->z_fuids, zfuid);
kmem_free(zfuid, sizeof (zfs_fuid_t));
}
return (FUID_ENCODE(idx, rid));
}