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cifs: modefromsid: write mode ACE first

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DACL should start with mode ACE first but we are putting it at the
end. reorder them to put it first.

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Aurelien Aptel 2019-09-17 01:47:27 +02:00 committed by Steve French
parent 352f2c9a57
commit e37a02c7eb
1 changed files with 19 additions and 17 deletions
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36
fs/cifs/cifsacl.c
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@ -809,30 +809,21 @@ static int set_chmod_dacl(struct cifs_acl *pndacl, struct cifs_sid *pownersid,
struct cifs_sid *pgrpsid, __u64 nmode, bool modefromsid)
{
u16 size = 0;
u32 num_aces = 0;
struct cifs_acl *pnndacl;
pnndacl = (struct cifs_acl *)((char *)pndacl + sizeof(struct cifs_acl));
size += fill_ace_for_sid((struct cifs_ace *) ((char *)pnndacl + size),
pownersid, nmode, S_IRWXU);
size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size),
pgrpsid, nmode, S_IRWXG);
size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size),
&sid_everyone, nmode, S_IRWXO);
/* TBD: Move this ACE to the top of ACE list instead of bottom */
if (modefromsid) {
struct cifs_ace *pntace =
(struct cifs_ace *)((char *)pnndacl + size);
int i;
pntace->type = ACCESS_DENIED;
pntace->type = ACCESS_ALLOWED;
pntace->flags = 0x0;
pntace->access_req = 0;
pntace->sid.num_subauth = 3;
pntace->sid.revision = 1;
/* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth * 4) */
pntace->size = cpu_to_le16(28);
size += 28;
for (i = 0; i < NUM_AUTHS; i++)
pntace->sid.authority[i] =
sid_unix_NFS_mode.authority[i];
@ -840,12 +831,23 @@ static int set_chmod_dacl(struct cifs_acl *pndacl, struct cifs_sid *pownersid,
pntace->sid.sub_auth[1] = sid_unix_NFS_mode.sub_auth[1];
pntace->sid.sub_auth[2] = cpu_to_le32(nmode & 07777);
pndacl->num_aces = cpu_to_le32(4);
size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size),
&sid_unix_NFS_mode, nmode, S_IRWXO);
} else
pndacl->num_aces = cpu_to_le32(3);
/* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */
pntace->size = cpu_to_le16(28);
size += 28;
num_aces++;
}
size += fill_ace_for_sid((struct cifs_ace *) ((char *)pnndacl + size),
pownersid, nmode, S_IRWXU);
num_aces++;
size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size),
pgrpsid, nmode, S_IRWXG);
num_aces++;
size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size),
&sid_everyone, nmode, S_IRWXO);
num_aces++;
pndacl->num_aces = cpu_to_le32(num_aces);
pndacl->size = cpu_to_le16(size + sizeof(struct cifs_acl));
return 0;