diff options
| -rw-r--r-- | fs/cifs/cifsacl.c | 37 | ||||
| -rw-r--r-- | fs/cifs/cifsproto.h | 1 | ||||
| -rw-r--r-- | fs/cifs/inode.c | 13 |
3 files changed, 38 insertions, 13 deletions
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 1d377b7f2860..7fe4509e6c03 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -701,10 +701,9 @@ static void dump_ace(struct cifs_ace *pace, char *end_of_acl) } #endif - static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, struct cifs_sid *pownersid, struct cifs_sid *pgrpsid, - struct cifs_fattr *fattr) + struct cifs_fattr *fattr, bool mode_from_special_sid) { int i; int num_aces = 0; @@ -757,22 +756,34 @@ static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, #ifdef CONFIG_CIFS_DEBUG2 dump_ace(ppace[i], end_of_acl); #endif - if (compare_sids(&(ppace[i]->sid), pownersid) == 0) + if (mode_from_special_sid && + (compare_sids(&(ppace[i]->sid), + &sid_unix_NFS_mode) == 0)) { + /* + * Full permissions are: + * 07777 = S_ISUID | S_ISGID | S_ISVTX | + * S_IRWXU | S_IRWXG | S_IRWXO + */ + fattr->cf_mode &= ~07777; + fattr->cf_mode |= + le32_to_cpu(ppace[i]->sid.sub_auth[2]); + break; + } else if (compare_sids(&(ppace[i]->sid), pownersid) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, &user_mask); - if (compare_sids(&(ppace[i]->sid), pgrpsid) == 0) + else if (compare_sids(&(ppace[i]->sid), pgrpsid) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, &group_mask); - if (compare_sids(&(ppace[i]->sid), &sid_everyone) == 0) + else if (compare_sids(&(ppace[i]->sid), &sid_everyone) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, &other_mask); - if (compare_sids(&(ppace[i]->sid), &sid_authusers) == 0) + else if (compare_sids(&(ppace[i]->sid), &sid_authusers) == 0) access_flags_to_mode(ppace[i]->access_req, ppace[i]->type, &fattr->cf_mode, @@ -851,7 +862,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl) /* Convert CIFS ACL to POSIX form */ static int parse_sec_desc(struct cifs_sb_info *cifs_sb, - struct cifs_ntsd *pntsd, int acl_len, struct cifs_fattr *fattr) + struct cifs_ntsd *pntsd, int acl_len, struct cifs_fattr *fattr, + bool get_mode_from_special_sid) { int rc = 0; struct cifs_sid *owner_sid_ptr, *group_sid_ptr; @@ -900,7 +912,7 @@ static int parse_sec_desc(struct cifs_sb_info *cifs_sb, if (dacloffset) parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, - group_sid_ptr, fattr); + group_sid_ptr, fattr, get_mode_from_special_sid); else cifs_dbg(FYI, "no ACL\n"); /* BB grant all or default perms? */ @@ -1128,8 +1140,8 @@ out: /* Translate the CIFS ACL (similar to NTFS ACL) for a file into mode bits */ int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, - struct inode *inode, const char *path, - const struct cifs_fid *pfid) + struct inode *inode, bool mode_from_special_sid, + const char *path, const struct cifs_fid *pfid) { struct cifs_ntsd *pntsd = NULL; u32 acllen = 0; @@ -1156,8 +1168,11 @@ cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, if (IS_ERR(pntsd)) { rc = PTR_ERR(pntsd); cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc); + } else if (mode_from_special_sid) { + rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, true); } else { - rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr); + /* get approximated mode from ACL */ + rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, false); kfree(pntsd); if (rc) cifs_dbg(VFS, "parse sec desc failed rc = %d\n", rc); diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 592a6cea2b79..dd75746e60cd 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -197,6 +197,7 @@ extern int cifs_rename_pending_delete(const char *full_path, const unsigned int xid); extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, struct inode *inode, + bool get_mode_from_special_sid, const char *path, const struct cifs_fid *pfid); extern int id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64, kuid_t, kgid_t); diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 56ca4b8ccaba..c1e620ebcf7c 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -893,8 +893,17 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, } /* fill in 0777 bits from ACL */ - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { - rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, full_path, fid); + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { + rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, + full_path, fid); + if (rc) { + cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", + __func__, rc); + goto cgii_exit; + } + } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { + rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, + full_path, fid); if (rc) { cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", __func__, rc); |