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|
/*
* NFS4 ACL handling
*
* Copyright (C) Jim McDonough, 2006
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "nfs4_acls.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_ACLS
#define SMBACL4_PARAM_TYPE_NAME "nfs4"
extern const struct generic_mapping file_generic_mapping;
#define SMB_ACE4_INT_MAGIC 0x76F8A967
typedef struct _SMB_ACE4_INT_T
{
uint32 magic;
SMB_ACE4PROP_T prop;
void *next;
} SMB_ACE4_INT_T;
#define SMB_ACL4_INT_MAGIC 0x29A3E792
typedef struct _SMB_ACL4_INT_T
{
uint32 magic;
uint32 naces;
SMB_ACE4_INT_T *first;
SMB_ACE4_INT_T *last;
} SMB_ACL4_INT_T;
static SMB_ACL4_INT_T *get_validated_aclint(SMB4ACL_T *theacl)
{
SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
if (theacl==NULL)
{
DEBUG(2, ("acl is NULL\n"));
errno = EINVAL;
return NULL;
}
if (aclint->magic!=SMB_ACL4_INT_MAGIC)
{
DEBUG(2, ("aclint bad magic 0x%x\n", aclint->magic));
errno = EINVAL;
return NULL;
}
return aclint;
}
static SMB_ACE4_INT_T *get_validated_aceint(SMB4ACE_T *ace)
{
SMB_ACE4_INT_T *aceint = (SMB_ACE4_INT_T *)ace;
if (ace==NULL)
{
DEBUG(2, ("ace is NULL\n"));
errno = EINVAL;
return NULL;
}
if (aceint->magic!=SMB_ACE4_INT_MAGIC)
{
DEBUG(2, ("aceint bad magic 0x%x\n", aceint->magic));
errno = EINVAL;
return NULL;
}
return aceint;
}
SMB4ACL_T *smb_create_smb4acl(void)
{
TALLOC_CTX *mem_ctx = talloc_tos();
SMB_ACL4_INT_T *theacl = (SMB_ACL4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACL4_INT_T));
if (theacl==NULL)
{
DEBUG(0, ("TALLOC_SIZE failed\n"));
errno = ENOMEM;
return NULL;
}
theacl->magic = SMB_ACL4_INT_MAGIC;
/* theacl->first, last = NULL not needed */
return (SMB4ACL_T *)theacl;
}
SMB4ACE_T *smb_add_ace4(SMB4ACL_T *theacl, SMB_ACE4PROP_T *prop)
{
SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
TALLOC_CTX *mem_ctx = talloc_tos();
SMB_ACE4_INT_T *ace;
ace = (SMB_ACE4_INT_T *)TALLOC_ZERO_SIZE(mem_ctx, sizeof(SMB_ACE4_INT_T));
if (ace==NULL)
{
DEBUG(0, ("TALLOC_SIZE failed\n"));
errno = ENOMEM;
return NULL;
}
ace->magic = SMB_ACE4_INT_MAGIC;
/* ace->next = NULL not needed */
memcpy(&ace->prop, prop, sizeof(SMB_ACE4PROP_T));
if (aclint->first==NULL)
{
aclint->first = ace;
aclint->last = ace;
} else {
aclint->last->next = (void *)ace;
aclint->last = ace;
}
aclint->naces++;
return (SMB4ACE_T *)ace;
}
SMB_ACE4PROP_T *smb_get_ace4(SMB4ACE_T *ace)
{
SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
if (aceint==NULL)
return NULL;
return &aceint->prop;
}
SMB4ACE_T *smb_next_ace4(SMB4ACE_T *ace)
{
SMB_ACE4_INT_T *aceint = get_validated_aceint(ace);
if (aceint==NULL)
return NULL;
return (SMB4ACE_T *)aceint->next;
}
SMB4ACE_T *smb_first_ace4(SMB4ACL_T *theacl)
{
SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
if (aclint==NULL)
return NULL;
return (SMB4ACE_T *)aclint->first;
}
uint32 smb_get_naces(SMB4ACL_T *theacl)
{
SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
if (aclint==NULL)
return 0;
return aclint->naces;
}
static int smbacl4_GetFileOwner(struct connection_struct *conn,
const char *filename,
SMB_STRUCT_STAT *psbuf)
{
memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
/* Get the stat struct for the owner info. */
if (vfs_stat_smb_fname(conn, filename, psbuf) != 0)
{
DEBUG(8, ("vfs_stat_smb_fname failed with error %s\n",
strerror(errno)));
return -1;
}
return 0;
}
static int smbacl4_fGetFileOwner(files_struct *fsp, SMB_STRUCT_STAT *psbuf)
{
memset(psbuf, 0, sizeof(SMB_STRUCT_STAT));
if (fsp->is_directory || fsp->fh->fd == -1) {
return smbacl4_GetFileOwner(fsp->conn,
fsp->fsp_name->base_name, psbuf);
}
if (SMB_VFS_FSTAT(fsp, psbuf) != 0)
{
DEBUG(8, ("SMB_VFS_FSTAT failed with error %s\n",
strerror(errno)));
return -1;
}
return 0;
}
static bool smbacl4_nfs42win(TALLOC_CTX *mem_ctx, SMB4ACL_T *theacl, /* in */
DOM_SID *psid_owner, /* in */
DOM_SID *psid_group, /* in */
bool is_directory, /* in */
struct security_ace **ppnt_ace_list, /* out */
int *pgood_aces /* out */
)
{
SMB_ACL4_INT_T *aclint = (SMB_ACL4_INT_T *)theacl;
SMB_ACE4_INT_T *aceint;
struct security_ace *nt_ace_list = NULL;
int good_aces = 0;
DEBUG(10, ("smbacl_nfs42win entered\n"));
aclint = get_validated_aclint(theacl);
/* We do not check for naces being 0 or theacl being NULL here because it is done upstream */
/* in smb_get_nt_acl_nfs4(). */
nt_ace_list = (struct security_ace *)TALLOC_ZERO_SIZE(mem_ctx, aclint->naces * sizeof(struct security_ace));
if (nt_ace_list==NULL)
{
DEBUG(10, ("talloc error"));
errno = ENOMEM;
return False;
}
for (aceint=aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
uint32_t mask;
DOM_SID sid;
SMB_ACE4PROP_T *ace = &aceint->prop;
uint32_t mapped_ace_flags;
DEBUG(10, ("magic: 0x%x, type: %d, iflags: %x, flags: %x, mask: %x, "
"who: %d\n", aceint->magic, ace->aceType, ace->flags,
ace->aceFlags, ace->aceMask, ace->who.id));
SMB_ASSERT(aceint->magic==SMB_ACE4_INT_MAGIC);
if (ace->flags & SMB_ACE4_ID_SPECIAL) {
switch (ace->who.special_id) {
case SMB_ACE4_WHO_OWNER:
sid_copy(&sid, psid_owner);
break;
case SMB_ACE4_WHO_GROUP:
sid_copy(&sid, psid_group);
break;
case SMB_ACE4_WHO_EVERYONE:
sid_copy(&sid, &global_sid_World);
break;
default:
DEBUG(8, ("invalid special who id %d "
"ignored\n", ace->who.special_id));
}
} else {
if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP) {
gid_to_sid(&sid, ace->who.gid);
} else {
uid_to_sid(&sid, ace->who.uid);
}
}
DEBUG(10, ("mapped %d to %s\n", ace->who.id,
sid_string_dbg(&sid)));
if (is_directory && (ace->aceMask & SMB_ACE4_ADD_FILE)) {
ace->aceMask |= SMB_ACE4_DELETE_CHILD;
}
mapped_ace_flags = ace->aceFlags & 0xf;
if (!is_directory && (mapped_ace_flags & (SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE))) {
/*
* GPFS sets inherits dir_inhert and file_inherit flags
* to files, too, which confuses windows, and seems to
* be wrong anyways. ==> Map these bits away for files.
*/
DEBUG(10, ("removing inherit flags from nfs4 ace\n"));
mapped_ace_flags &= ~(SMB_ACE4_FILE_INHERIT_ACE|SMB_ACE4_DIRECTORY_INHERIT_ACE);
}
DEBUG(10, ("mapped ace flags: 0x%x => 0x%x\n",
ace->aceFlags, mapped_ace_flags));
mask = ace->aceMask;
init_sec_ace(&nt_ace_list[good_aces++], &sid,
ace->aceType, mask,
mapped_ace_flags);
}
*ppnt_ace_list = nt_ace_list;
*pgood_aces = good_aces;
return True;
}
static NTSTATUS smb_get_nt_acl_nfs4_common(const SMB_STRUCT_STAT *sbuf,
uint32 security_info,
struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
{
int good_aces = 0;
DOM_SID sid_owner, sid_group;
size_t sd_size = 0;
struct security_ace *nt_ace_list = NULL;
struct security_acl *psa = NULL;
TALLOC_CTX *mem_ctx = talloc_tos();
if (theacl==NULL || smb_get_naces(theacl)==0)
return NT_STATUS_ACCESS_DENIED; /* special because we
* shouldn't alloc 0 for
* win */
uid_to_sid(&sid_owner, sbuf->st_ex_uid);
gid_to_sid(&sid_group, sbuf->st_ex_gid);
if (smbacl4_nfs42win(mem_ctx, theacl, &sid_owner, &sid_group,
S_ISDIR(sbuf->st_ex_mode),
&nt_ace_list, &good_aces)==False) {
DEBUG(8,("smbacl4_nfs42win failed\n"));
return map_nt_error_from_unix(errno);
}
psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, good_aces, nt_ace_list);
if (psa == NULL) {
DEBUG(2,("make_sec_acl failed\n"));
return NT_STATUS_NO_MEMORY;
}
DEBUG(10,("after make sec_acl\n"));
*ppdesc = make_sec_desc(mem_ctx, SD_REVISION, SEC_DESC_SELF_RELATIVE,
(security_info & OWNER_SECURITY_INFORMATION) ? &sid_owner : NULL,
(security_info & GROUP_SECURITY_INFORMATION) ? &sid_group : NULL,
NULL, psa, &sd_size);
if (*ppdesc==NULL) {
DEBUG(2,("make_sec_desc failed\n"));
return NT_STATUS_NO_MEMORY;
}
DEBUG(10, ("smb_get_nt_acl_nfs4_common successfully exited with sd_size %d\n",
(int)ndr_size_security_descriptor(*ppdesc, NULL, 0)));
return NT_STATUS_OK;
}
NTSTATUS smb_fget_nt_acl_nfs4(files_struct *fsp,
uint32 security_info,
struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
{
SMB_STRUCT_STAT sbuf;
DEBUG(10, ("smb_fget_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
if (smbacl4_fGetFileOwner(fsp, &sbuf)) {
return map_nt_error_from_unix(errno);
}
return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
}
NTSTATUS smb_get_nt_acl_nfs4(struct connection_struct *conn,
const char *name,
uint32 security_info,
struct security_descriptor **ppdesc, SMB4ACL_T *theacl)
{
SMB_STRUCT_STAT sbuf;
DEBUG(10, ("smb_get_nt_acl_nfs4 invoked for %s\n", name));
if (smbacl4_GetFileOwner(conn, name, &sbuf)) {
return map_nt_error_from_unix(errno);
}
return smb_get_nt_acl_nfs4_common(&sbuf, security_info, ppdesc, theacl);
}
enum smbacl4_mode_enum {e_simple=0, e_special=1};
enum smbacl4_acedup_enum {e_dontcare=0, e_reject=1, e_ignore=2, e_merge=3};
typedef struct _smbacl4_vfs_params {
enum smbacl4_mode_enum mode;
bool do_chown;
enum smbacl4_acedup_enum acedup;
struct db_context *sid_mapping_table;
} smbacl4_vfs_params;
/*
* Gather special parameters for NFS4 ACL handling
*/
static int smbacl4_get_vfs_params(
const char *type_name,
files_struct *fsp,
smbacl4_vfs_params *params
)
{
static const struct enum_list enum_smbacl4_modes[] = {
{ e_simple, "simple" },
{ e_special, "special" }
};
static const struct enum_list enum_smbacl4_acedups[] = {
{ e_dontcare, "dontcare" },
{ e_reject, "reject" },
{ e_ignore, "ignore" },
{ e_merge, "merge" },
};
memset(params, 0, sizeof(smbacl4_vfs_params));
params->mode = (enum smbacl4_mode_enum)lp_parm_enum(
SNUM(fsp->conn), type_name,
"mode", enum_smbacl4_modes, e_simple);
params->do_chown = lp_parm_bool(SNUM(fsp->conn), type_name,
"chown", True);
params->acedup = (enum smbacl4_acedup_enum)lp_parm_enum(
SNUM(fsp->conn), type_name,
"acedup", enum_smbacl4_acedups, e_dontcare);
DEBUG(10, ("mode:%s, do_chown:%s, acedup: %s\n",
enum_smbacl4_modes[params->mode].name,
params->do_chown ? "true" : "false",
enum_smbacl4_acedups[params->acedup].name));
return 0;
}
static void smbacl4_dump_nfs4acl(int level, SMB4ACL_T *theacl)
{
SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
SMB_ACE4_INT_T *aceint;
DEBUG(level, ("NFS4ACL: size=%d\n", aclint->naces));
for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
SMB_ACE4PROP_T *ace = &aceint->prop;
DEBUG(level, ("\tACE: type=%d, flags=0x%x, fflags=0x%x, mask=0x%x, id=%d\n",
ace->aceType,
ace->aceFlags, ace->flags,
ace->aceMask,
ace->who.id));
}
}
/*
* Find 2 NFS4 who-special ACE property (non-copy!!!)
* match nonzero if "special" and who is equal
* return ace if found matching; otherwise NULL
*/
static SMB_ACE4PROP_T *smbacl4_find_equal_special(
SMB4ACL_T *theacl,
SMB_ACE4PROP_T *aceNew)
{
SMB_ACL4_INT_T *aclint = get_validated_aclint(theacl);
SMB_ACE4_INT_T *aceint;
for(aceint = aclint->first; aceint!=NULL; aceint=(SMB_ACE4_INT_T *)aceint->next) {
SMB_ACE4PROP_T *ace = &aceint->prop;
DEBUG(10,("ace type:0x%x flags:0x%x aceFlags:0x%x "
"new type:0x%x flags:0x%x aceFlags:0x%x\n",
ace->aceType, ace->flags, ace->aceFlags,
aceNew->aceType, aceNew->flags,aceNew->aceFlags));
if (ace->flags == aceNew->flags &&
ace->aceType==aceNew->aceType &&
((ace->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)==
(aceNew->aceFlags&SMB_ACE4_INHERIT_ONLY_ACE)) &&
(ace->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)==
(aceNew->aceFlags&SMB_ACE4_IDENTIFIER_GROUP)
) {
/* keep type safety; e.g. gid is an u.short */
if (ace->flags & SMB_ACE4_ID_SPECIAL)
{
if (ace->who.special_id==aceNew->who.special_id)
return ace;
} else {
if (ace->aceFlags & SMB_ACE4_IDENTIFIER_GROUP)
{
if (ace->who.gid==aceNew->who.gid)
return ace;
} else {
if (ace->who.uid==aceNew->who.uid)
return ace;
}
}
}
}
return NULL;
}
static bool nfs4_map_sid(smbacl4_vfs_params *params, const DOM_SID *src,
DOM_SID *dst)
{
static struct db_context *mapping_db = NULL;
TDB_DATA data;
if (mapping_db == NULL) {
const char *dbname = lp_parm_const_string(
-1, SMBACL4_PARAM_TYPE_NAME, "sidmap", NULL);
if (dbname == NULL) {
DEBUG(10, ("%s:sidmap not defined\n",
SMBACL4_PARAM_TYPE_NAME));
return False;
}
become_root();
mapping_db = db_open(NULL, dbname, 0, TDB_DEFAULT,
O_RDONLY, 0600);
unbecome_root();
if (mapping_db == NULL) {
DEBUG(1, ("could not open sidmap: %s\n",
strerror(errno)));
return False;
}
}
if (mapping_db->fetch(mapping_db, NULL,
string_term_tdb_data(sid_string_tos(src)),
&data) == -1) {
DEBUG(10, ("could not find mapping for SID %s\n",
sid_string_dbg(src)));
return False;
}
if ((data.dptr == NULL) || (data.dsize <= 0)
|| (data.dptr[data.dsize-1] != '\0')) {
DEBUG(5, ("invalid mapping for SID %s\n",
sid_string_dbg(src)));
TALLOC_FREE(data.dptr);
return False;
}
if (!string_to_sid(dst, (char *)data.dptr)) {
DEBUG(1, ("invalid mapping %s for SID %s\n",
(char *)data.dptr, sid_string_dbg(src)));
TALLOC_FREE(data.dptr);
return False;
}
TALLOC_FREE(data.dptr);
return True;
}
static bool smbacl4_fill_ace4(
TALLOC_CTX *mem_ctx,
const char *filename,
smbacl4_vfs_params *params,
uid_t ownerUID,
gid_t ownerGID,
const struct security_ace *ace_nt, /* input */
SMB_ACE4PROP_T *ace_v4 /* output */
)
{
DEBUG(10, ("got ace for %s\n", sid_string_dbg(&ace_nt->trustee)));
memset(ace_v4, 0, sizeof(SMB_ACE4PROP_T));
ace_v4->aceType = ace_nt->type; /* only ACCESS|DENY supported right now */
ace_v4->aceFlags = ace_nt->flags & SEC_ACE_FLAG_VALID_INHERIT;
ace_v4->aceMask = ace_nt->access_mask &
(STD_RIGHT_ALL_ACCESS | SA_RIGHT_FILE_ALL_ACCESS);
se_map_generic(&ace_v4->aceMask, &file_generic_mapping);
if (ace_v4->aceFlags!=ace_nt->flags)
DEBUG(9, ("ace_v4->aceFlags(0x%x)!=ace_nt->flags(0x%x)\n",
ace_v4->aceFlags, ace_nt->flags));
if (ace_v4->aceMask!=ace_nt->access_mask)
DEBUG(9, ("ace_v4->aceMask(0x%x)!=ace_nt->access_mask(0x%x)\n",
ace_v4->aceMask, ace_nt->access_mask));
if (sid_equal(&ace_nt->trustee, &global_sid_World)) {
ace_v4->who.special_id = SMB_ACE4_WHO_EVERYONE;
ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
} else {
const char *dom, *name;
enum lsa_SidType type;
uid_t uid;
gid_t gid;
DOM_SID sid;
sid_copy(&sid, &ace_nt->trustee);
if (!lookup_sid(mem_ctx, &sid, &dom, &name, &type)) {
DOM_SID mapped;
if (!nfs4_map_sid(params, &sid, &mapped)) {
DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
"unknown\n", filename, sid_string_dbg(&sid)));
errno = EINVAL;
return False;
}
DEBUG(2, ("nfs4_acls.c: file [%s]: mapped SID %s "
"to %s\n", filename, sid_string_dbg(&sid), sid_string_dbg(&mapped)));
if (!lookup_sid(mem_ctx, &mapped, &dom,
&name, &type)) {
DEBUG(1, ("nfs4_acls.c: file [%s]: SID %s "
"mapped from %s is unknown\n",
filename, sid_string_dbg(&mapped), sid_string_dbg(&sid)));
errno = EINVAL;
return False;
}
sid_copy(&sid, &mapped);
}
if (type == SID_NAME_USER) {
if (!sid_to_uid(&sid, &uid)) {
DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
"convert %s to uid\n", filename,
sid_string_dbg(&sid)));
return False;
}
if (params->mode==e_special && uid==ownerUID) {
ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
ace_v4->who.special_id = SMB_ACE4_WHO_OWNER;
} else {
ace_v4->who.uid = uid;
}
} else { /* else group? - TODO check it... */
if (!sid_to_gid(&sid, &gid)) {
DEBUG(1, ("nfs4_acls.c: file [%s]: could not "
"convert %s to gid\n", filename,
sid_string_dbg(&sid)));
return False;
}
ace_v4->aceFlags |= SMB_ACE4_IDENTIFIER_GROUP;
if (params->mode==e_special && gid==ownerGID) {
ace_v4->flags |= SMB_ACE4_ID_SPECIAL;
ace_v4->who.special_id = SMB_ACE4_WHO_GROUP;
} else {
ace_v4->who.gid = gid;
}
}
}
return True; /* OK */
}
static int smbacl4_MergeIgnoreReject(
enum smbacl4_acedup_enum acedup,
SMB4ACL_T *theacl, /* may modify it */
SMB_ACE4PROP_T *ace, /* the "new" ACE */
bool *paddNewACE,
int i
)
{
int result = 0;
SMB_ACE4PROP_T *ace4found = smbacl4_find_equal_special(theacl, ace);
if (ace4found)
{
switch(acedup)
{
case e_merge: /* "merge" flags */
*paddNewACE = False;
ace4found->aceFlags |= ace->aceFlags;
ace4found->aceMask |= ace->aceMask;
break;
case e_ignore: /* leave out this record */
*paddNewACE = False;
break;
case e_reject: /* do an error */
DEBUG(8, ("ACL rejected by duplicate nt ace#%d\n", i));
errno = EINVAL; /* SHOULD be set on any _real_ error */
result = -1;
break;
default:
break;
}
}
return result;
}
static SMB4ACL_T *smbacl4_win2nfs4(
const char *filename,
const struct security_acl *dacl,
smbacl4_vfs_params *pparams,
uid_t ownerUID,
gid_t ownerGID
)
{
SMB4ACL_T *theacl;
uint32 i;
TALLOC_CTX *mem_ctx = talloc_tos();
DEBUG(10, ("smbacl4_win2nfs4 invoked\n"));
theacl = smb_create_smb4acl();
if (theacl==NULL)
return NULL;
for(i=0; i<dacl->num_aces; i++) {
SMB_ACE4PROP_T ace_v4;
bool addNewACE = True;
if (!smbacl4_fill_ace4(mem_ctx, filename, pparams,
ownerUID, ownerGID,
dacl->aces + i, &ace_v4)) {
DEBUG(3, ("Could not fill ace for file %s, SID %s\n",
filename,
sid_string_dbg(&((dacl->aces+i)->trustee))));
continue;
}
if (pparams->acedup!=e_dontcare) {
if (smbacl4_MergeIgnoreReject(pparams->acedup, theacl,
&ace_v4, &addNewACE, i))
return NULL;
}
if (addNewACE)
smb_add_ace4(theacl, &ace_v4);
}
return theacl;
}
NTSTATUS smb_set_nt_acl_nfs4(files_struct *fsp,
uint32 security_info_sent,
const struct security_descriptor *psd,
set_nfs4acl_native_fn_t set_nfs4_native)
{
smbacl4_vfs_params params;
SMB4ACL_T *theacl = NULL;
bool result;
SMB_STRUCT_STAT sbuf;
bool set_acl_as_root = false;
uid_t newUID = (uid_t)-1;
gid_t newGID = (gid_t)-1;
int saved_errno;
DEBUG(10, ("smb_set_nt_acl_nfs4 invoked for %s\n", fsp_str_dbg(fsp)));
if ((security_info_sent & (DACL_SECURITY_INFORMATION |
GROUP_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION)) == 0)
{
DEBUG(9, ("security_info_sent (0x%x) ignored\n",
security_info_sent));
return NT_STATUS_OK; /* won't show error - later to be refined... */
}
/* Special behaviours */
if (smbacl4_get_vfs_params(SMBACL4_PARAM_TYPE_NAME, fsp, ¶ms))
return NT_STATUS_NO_MEMORY;
if (smbacl4_fGetFileOwner(fsp, &sbuf))
return map_nt_error_from_unix(errno);
if (params.do_chown) {
/* chown logic is a copy/paste from posix_acl.c:set_nt_acl */
NTSTATUS status = unpack_nt_owners(fsp->conn, &newUID, &newGID, security_info_sent, psd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(8, ("unpack_nt_owners failed"));
return status;
}
if (((newUID != (uid_t)-1) && (sbuf.st_ex_uid != newUID)) ||
((newGID != (gid_t)-1) && (sbuf.st_ex_gid != newGID))) {
if(try_chown(fsp->conn, fsp->fsp_name, newUID,
newGID)) {
DEBUG(3,("chown %s, %u, %u failed. Error = "
"%s.\n", fsp_str_dbg(fsp),
(unsigned int)newUID,
(unsigned int)newGID,
strerror(errno)));
return map_nt_error_from_unix(errno);
}
DEBUG(10,("chown %s, %u, %u succeeded.\n",
fsp_str_dbg(fsp), (unsigned int)newUID,
(unsigned int)newGID));
if (smbacl4_GetFileOwner(fsp->conn,
fsp->fsp_name->base_name,
&sbuf))
return map_nt_error_from_unix(errno);
/* If we successfully chowned, we know we must
* be able to set the acl, so do it as root.
*/
set_acl_as_root = true;
}
}
if (!(security_info_sent & DACL_SECURITY_INFORMATION) || psd->dacl ==NULL) {
DEBUG(10, ("no dacl found; security_info_sent = 0x%x\n", security_info_sent));
return NT_STATUS_OK;
}
theacl = smbacl4_win2nfs4(fsp->fsp_name->base_name, psd->dacl, ¶ms,
sbuf.st_ex_uid, sbuf.st_ex_gid);
if (!theacl)
return map_nt_error_from_unix(errno);
smbacl4_dump_nfs4acl(10, theacl);
if (set_acl_as_root) {
become_root();
}
result = set_nfs4_native(fsp, theacl);
saved_errno = errno;
if (set_acl_as_root) {
unbecome_root();
}
if (result!=True) {
errno = saved_errno;
DEBUG(10, ("set_nfs4_native failed with %s\n", strerror(errno)));
return map_nt_error_from_unix(errno);
}
DEBUG(10, ("smb_set_nt_acl_nfs4 succeeded\n"));
return NT_STATUS_OK;
}
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