[CIFS] Support for CIFS ACLs (part 1)

Add code to be able to dump CIFS ACL information
when Query Posix ACL with cifsacl mount parm enabled.

Signed-off-by: Shirish Pargoankar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2007-09-24 20:25:46 +00:00
parent 2224f4e5d5
commit 442aa310f3
4 changed files with 144 additions and 9 deletions

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@ -22,12 +22,42 @@
#ifndef _CIFSACL_H
#define _CIFSACL_H
struct cifs_ntsd {
__u16 revision; /* revision level */
__u16 type;
__u32 osidoffset;
__u32 gsidoffset;
__u32 sacloffset;
__u32 dacloffset;
} __attribute__((packed));
struct cifs_sid {
__u8 revision; /* revision level */
__u8 num_subauths;
__u8 num_auth;
__u8 authority[6];
__u32 sub_auth[4];
/* next sub_auth if any ... */
__u32 rid;
} __attribute__((packed));
struct cifs_acl {
__u16 revision; /* revision level */
__u16 size;
__u32 num_aces;
} __attribute__((packed));
struct cifs_ntace {
__u8 type;
__u8 flags;
__u16 size;
__u32 access_req;
} __attribute__((packed));
struct cifs_ace {
__u8 revision; /* revision level */
__u8 num_auth;
__u8 authority[6];
__u32 sub_auth[4];
__u32 rid;
} __attribute__((packed));
/* everyone */

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@ -19,6 +19,7 @@
#include <linux/in.h>
#include <linux/in6.h>
#include "cifs_fs_sb.h"
#include "cifsacl.h"
/*
* The sizes of various internal tables and strings
*/
@ -115,6 +116,17 @@ struct mac_key {
} data;
};
struct cifs_cred {
int uid;
int gid;
int mode;
int cecount;
struct cifs_sid osid;
struct cifs_sid gsid;
struct cifs_ntace *ntaces;
struct cifs_ace *aces;
};
/*
*****************************************************************
* Except the CIFS PDUs themselves all the

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@ -3048,17 +3048,110 @@ static const struct cifs_sid sid_everyone =
static const struct cifs_sid sid_user =
{1, 2 , {0, 0, 0, 0, 0, 5}, {32, 545, 0, 0}};
/* Convert CIFS ACL to POSIX form */
static int parse_sec_desc(struct cifs_sid *psec_desc, int acl_len)
static void parse_sid(struct cifs_sid * psid, char * end_of_acl)
{
return 0;
/* BB need to add parm so we can store the SID BB */
/* validate that we do not go past end of acl */
if (end_of_acl < (char *)psid + sizeof(struct cifs_sid)) {
cERROR(1, ("ACL to small to parse SID"));
return;
}
#ifdef CONFIG_CIFS_DEBUG2
cFYI(1, ("revision %d num_auth %d First subauth 0x%x",
psid->revision, psid->num_auth, psid->sub_auth[0]));
/* BB add length check to make sure that we do not have huge num auths
and therefore go off the end */
cFYI(1, ("RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_auth])));
#endif
return;
}
/* Convert CIFS ACL to POSIX form */
static int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
{
int i;
int num_aces = 0;
int acl_size;
struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
struct cifs_acl *dacl_ptr; /* no need for SACL ptr */
struct cifs_ntace **ppntace;
struct cifs_ace **ppace;
char *acl_base;
char *end_of_acl = ((char *)pntsd) + acl_len;
owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
cpu_to_le32(pntsd->osidoffset));
group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
cpu_to_le32(pntsd->gsidoffset));
dacl_ptr = (struct cifs_acl *)((char *)pntsd +
cpu_to_le32(pntsd->dacloffset));
#ifdef CONFIG_CIFS_DEBUG2
cFYI(1,("revision %d type 0x%x ooffset 0x%x goffset 0x%x "
"sacloffset 0x%x dacloffset 0x%x", pntsd->revision, pntsd->type,
pntsd->osidoffset, pntsd->gsidoffset, pntsd->sacloffset,
pntsd->dacloffset));
#endif
parse_sid(owner_sid_ptr, end_of_acl);
parse_sid(group_sid_ptr, end_of_acl);
/* cifscred->uid = owner_sid_ptr->rid;
cifscred->gid = group_sid_ptr->rid;
memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
sizeof (struct cifs_sid));
memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
sizeof (struct cifs_sid)); */
num_aces = cpu_to_le32(dacl_ptr->num_aces);
cFYI(1, ("num aces %d", num_aces));
if (num_aces > 0) {
ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
GFP_KERNEL);
ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
GFP_KERNEL);
/* cifscred->cecount = dacl_ptr->num_aces;
cifscred->ntaces = kmalloc(num_aces *
sizeof(struct cifs_ntace *), GFP_KERNEL);
cifscred->aces = kmalloc(num_aces *
sizeof(struct cifs_ace *), GFP_KERNEL);*/
acl_base = (char *)dacl_ptr;
acl_size = sizeof(struct cifs_acl);
for (i = 0; i < num_aces; ++i) {
ppntace[i] = (struct cifs_ntace *)
(acl_base + acl_size);
ppace[i] = (struct cifs_ace *)
((char *)ppntace[i] +
sizeof(struct cifs_ntace));
/* memcpy((void *)(&(cifscred->ntaces[i])),
(void *)ntace_ptrptr[i],
sizeof(struct cifs_ntace));
memcpy((void *)(&(cifscred->aces[i])),
(void *)ace_ptrptr[i],
sizeof(struct cifs_ace)); */
acl_base = (char *)ppntace[i];
acl_size = cpu_to_le32(ppntace[i]->size);
#ifdef CONFIG_CIFS_DEBUG2
cFYI(1, ("ACE revision:%d", ppace[i]->revision));
}
#endif
kfree(ppace);
kfree(ppntace);
}
return (0);
}
/* Get Security Descriptor (by handle) from remote server for a file or dir */
int
CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
/* BB fix up return info */ char *acl_inf, const int buflen,
const int acl_type /* ACCESS/DEFAULT not sure implication */)
const int acl_type)
{
int rc = 0;
int buf_type = 0;
@ -3088,7 +3181,7 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
if (rc) {
cFYI(1, ("Send error in QuerySecDesc = %d", rc));
} else { /* decode response */
struct cifs_sid *psec_desc;
struct cifs_ntsd *psec_desc;
__le32 * parm;
int parm_len;
int data_len;

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@ -1742,9 +1742,9 @@ void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
cFYI(1, ("very large write cap"));
#endif /* CIFS_DEBUG2 */
if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
if (vol_info == NULL)
if (vol_info == NULL) {
cFYI(1, ("resetting capabilities failed"));
else
} else
cERROR(1, ("Negotiating Unix capabilities "
"with the server failed. Consider "
"mounting with the Unix Extensions\n"