s4-ntvfs: added allow_override check based on use of NT ACL

This disables the posix permission override if the calculated
permissions did not come from a NT ACL.

Autobuild-User: Andrew Tridgell <tridge@samba.org>
Autobuild-Date: Thu Dec  1 05:14:49 CET 2011 on sn-devel-104

10 files changed, 59 insertions, 41 deletions

diff --git a/source4/ntvfs/posix/pvfs_acl.c b/source4/ntvfs/posix/pvfs_acl.c
index 664196ab3e..810dcddbd3 100644
--- a/source4/ntvfs/posix/pvfs_acl.c
+++ b/source4/ntvfs/posix/pvfs_acl.c
@@ -643,6 +643,14 @@ NTSTATUS pvfs_access_check(struct pvfs_state *pvfs,
 	/* check the acl against the required access mask */
 	status = se_access_check(sd, token, *access_mask, access_mask);
 	talloc_free(acl);
+
+	/* if we used a NT acl, then allow access override if the
+	   share allows for posix permission override
+	*/
+	if (NT_STATUS_IS_OK(status)) {
+		name->allow_override = (pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) != 0;
+	}
+
 done:
 	if (pvfs->ntvfs->ctx->protocol < PROTOCOL_SMB2_02) {
 		/* on SMB, this bit is always granted, even if not
@@ -771,7 +779,11 @@ NTSTATUS pvfs_access_check_parent(struct pvfs_state *pvfs,
 		return status;
 	}
 
-	return pvfs_access_check_simple(pvfs, req, parent, access_mask);
+	status = pvfs_access_check_simple(pvfs, req, parent, access_mask);
+	if (NT_STATUS_IS_OK(status) && parent->allow_override) {
+		name->allow_override = true;
+	}
+	return status;
 }
 
 
diff --git a/source4/ntvfs/posix/pvfs_mkdir.c b/source4/ntvfs/posix/pvfs_mkdir.c
index 10de1d6d5c..2cf43ab1e1 100644
--- a/source4/ntvfs/posix/pvfs_mkdir.c
+++ b/source4/ntvfs/posix/pvfs_mkdir.c
@@ -51,7 +51,7 @@ static NTSTATUS pvfs_t2mkdir(struct pvfs_state *pvfs,
 
 	mode = pvfs_fileperms(pvfs, FILE_ATTRIBUTE_DIRECTORY);
 
-	if (pvfs_sys_mkdir(pvfs, name->full_name, mode) == -1) {
+	if (pvfs_sys_mkdir(pvfs, name->full_name, mode, name->allow_override) == -1) {
 		return pvfs_map_errno(pvfs, errno);
 	}
 
@@ -69,7 +69,7 @@ static NTSTATUS pvfs_t2mkdir(struct pvfs_state *pvfs,
 	/* setup an inherited acl from the parent */
 	status = pvfs_acl_inherit(pvfs, req, name, -1);
 	if (!NT_STATUS_IS_OK(status)) {
-		pvfs_sys_rmdir(pvfs, name->full_name);
+		pvfs_sys_rmdir(pvfs, name->full_name, name->allow_override);
 		return status;
 	}
 
@@ -78,7 +78,7 @@ static NTSTATUS pvfs_t2mkdir(struct pvfs_state *pvfs,
 					 md->t2mkdir.in.num_eas,
 					 md->t2mkdir.in.eas);
 	if (!NT_STATUS_IS_OK(status)) {
-		pvfs_sys_rmdir(pvfs, name->full_name);
+		pvfs_sys_rmdir(pvfs, name->full_name, name->allow_override);
 		return status;
 	}
 
@@ -127,7 +127,7 @@ NTSTATUS pvfs_mkdir(struct ntvfs_module_context *ntvfs,
 
 	mode = pvfs_fileperms(pvfs, FILE_ATTRIBUTE_DIRECTORY);
 
-	if (pvfs_sys_mkdir(pvfs, name->full_name, mode) == -1) {
+	if (pvfs_sys_mkdir(pvfs, name->full_name, mode, name->allow_override) == -1) {
 		return pvfs_map_errno(pvfs, errno);
 	}
 
@@ -136,7 +136,7 @@ NTSTATUS pvfs_mkdir(struct ntvfs_module_context *ntvfs,
 	/* setup an inherited acl from the parent */
 	status = pvfs_acl_inherit(pvfs, req, name, -1);
 	if (!NT_STATUS_IS_OK(status)) {
-		pvfs_sys_rmdir(pvfs, name->full_name);
+		pvfs_sys_rmdir(pvfs, name->full_name, name->allow_override);
 		return status;
 	}
 
@@ -179,7 +179,7 @@ NTSTATUS pvfs_rmdir(struct ntvfs_module_context *ntvfs,
 		return status;
 	}
 
-	if (pvfs_sys_rmdir(pvfs, name->full_name) == -1) {
+	if (pvfs_sys_rmdir(pvfs, name->full_name, name->allow_override) == -1) {
 		/* some olders systems don't return ENOTEMPTY to rmdir() */
 		if (errno == EEXIST) {
 			return NT_STATUS_DIRECTORY_NOT_EMPTY;
diff --git a/source4/ntvfs/posix/pvfs_open.c b/source4/ntvfs/posix/pvfs_open.c
index c0f55e8e73..a095f74633 100644
--- a/source4/ntvfs/posix/pvfs_open.c
+++ b/source4/ntvfs/posix/pvfs_open.c
@@ -73,7 +73,7 @@ static int pvfs_dir_handle_destructor(struct pvfs_file_handle *h)
 				DEBUG(0,("Warning: xattr unlink hook failed for '%s' - %s\n",
 					 delete_path, nt_errstr(status)));
 			}
-			if (pvfs_sys_rmdir(h->pvfs, delete_path) != 0) {
+			if (pvfs_sys_rmdir(h->pvfs, delete_path, h->name->allow_override) != 0) {
 				DEBUG(0,("pvfs_dir_handle_destructor: failed to rmdir '%s' - %s\n",
 					 delete_path, strerror(errno)));
 			}
@@ -344,7 +344,7 @@ static NTSTATUS pvfs_open_directory(struct pvfs_state *pvfs,
 		uint32_t attrib = io->generic.in.file_attr | FILE_ATTRIBUTE_DIRECTORY;
 		mode_t mode = pvfs_fileperms(pvfs, attrib);
 
-		if (pvfs_sys_mkdir(pvfs, name->full_name, mode) == -1) {
+		if (pvfs_sys_mkdir(pvfs, name->full_name, mode, name->allow_override) == -1) {
 			return pvfs_map_errno(pvfs,errno);
 		}
 
@@ -432,7 +432,7 @@ static NTSTATUS pvfs_open_directory(struct pvfs_state *pvfs,
 	return NT_STATUS_OK;
 
 cleanup_delete:
-	pvfs_sys_rmdir(pvfs, name->full_name);
+	pvfs_sys_rmdir(pvfs, name->full_name, name->allow_override);
 	return status;
 }
 
@@ -514,7 +514,7 @@ static int pvfs_handle_destructor(struct pvfs_file_handle *h)
 				DEBUG(0,("Warning: xattr unlink hook failed for '%s' - %s\n",
 					 delete_path, nt_errstr(status)));
 			}
-			if (pvfs_sys_unlink(h->pvfs, delete_path) != 0) {
+			if (pvfs_sys_unlink(h->pvfs, delete_path, h->name->allow_override) != 0) {
 				DEBUG(0,("pvfs_close: failed to delete '%s' - %s\n",
 					 delete_path, strerror(errno)));
 			} else {
@@ -677,7 +677,7 @@ static NTSTATUS pvfs_create_file(struct pvfs_state *pvfs,
 	mode = pvfs_fileperms(pvfs, attrib);
 
 	/* create the file */
-	fd = pvfs_sys_open(pvfs, name->full_name, flags | O_CREAT | O_EXCL| O_NONBLOCK, mode);
+	fd = pvfs_sys_open(pvfs, name->full_name, flags | O_CREAT | O_EXCL| O_NONBLOCK, mode, name->allow_override);
 	if (fd == -1) {
 		return pvfs_map_errno(pvfs, errno);
 	}
@@ -856,7 +856,7 @@ static NTSTATUS pvfs_create_file(struct pvfs_state *pvfs,
 
 cleanup_delete:
 	close(fd);
-	pvfs_sys_unlink(pvfs, name->full_name);
+	pvfs_sys_unlink(pvfs, name->full_name, name->allow_override);
 	return status;
 }
 
@@ -1549,7 +1549,7 @@ NTSTATUS pvfs_open(struct ntvfs_module_context *ntvfs,
 	}
 
 	/* do the actual open */
-	fd = pvfs_sys_open(pvfs, f->handle->name->full_name, flags | O_NONBLOCK, 0);
+	fd = pvfs_sys_open(pvfs, f->handle->name->full_name, flags | O_NONBLOCK, 0, name->allow_override);
 	if (fd == -1) {
 		status = pvfs_map_errno(f->pvfs, errno);
 
@@ -1635,7 +1635,7 @@ NTSTATUS pvfs_open(struct ntvfs_module_context *ntvfs,
 		mode_t mode = pvfs_fileperms(pvfs, attrib);
 		if (f->handle->name->st.st_mode != mode &&
 		    f->handle->name->dos.attrib != attrib &&
-		    pvfs_sys_fchmod(pvfs, fd, mode) == -1) {
+		    pvfs_sys_fchmod(pvfs, fd, mode, name->allow_override) == -1) {
 			talloc_free(lck);
 			return pvfs_map_errno(pvfs, errno);
 		}
diff --git a/source4/ntvfs/posix/pvfs_rename.c b/source4/ntvfs/posix/pvfs_rename.c
index 5296811f02..432716130c 100644
--- a/source4/ntvfs/posix/pvfs_rename.c
+++ b/source4/ntvfs/posix/pvfs_rename.c
@@ -37,7 +37,8 @@ NTSTATUS pvfs_do_rename(struct pvfs_state *pvfs,
 	uint32_t mask;
 	NTSTATUS status;
 
-	if (pvfs_sys_rename(pvfs, name1->full_name, name2) == -1) {
+	if (pvfs_sys_rename(pvfs, name1->full_name, name2,
+			    name1->allow_override) == -1) {
 		return pvfs_map_errno(pvfs, errno);
 	}
 
@@ -624,7 +625,7 @@ static NTSTATUS pvfs_rename_nt(struct ntvfs_module_context *ntvfs,
 	case RENAME_FLAG_COPY:
 		status = pvfs_access_check_parent(pvfs, req, name2, SEC_DIR_ADD_FILE);
 		NT_STATUS_NOT_OK_RETURN(status);
-		return pvfs_copy_file(pvfs, name1, name2);
+		return pvfs_copy_file(pvfs, name1, name2, name1->allow_override && name2->allow_override);
 
 	case RENAME_FLAG_MOVE_CLUSTER_INFORMATION:
 		DEBUG(3,(__location__ ": Invalid rename cluster for %s\n",
diff --git a/source4/ntvfs/posix/pvfs_resolve.c b/source4/ntvfs/posix/pvfs_resolve.c
index 255728382e..837ea174d6 100644
--- a/source4/ntvfs/posix/pvfs_resolve.c
+++ b/source4/ntvfs/posix/pvfs_resolve.c
@@ -518,6 +518,7 @@ NTSTATUS pvfs_resolve_name(struct pvfs_state *pvfs,
 
 	(*name)->exists = false;
 	(*name)->stream_exists = false;
+	(*name)->allow_override = false;
 
 	if (!(pvfs->fs_attribs & FS_ATTR_NAMED_STREAMS)) {
 		flags &= ~PVFS_RESOLVE_STREAMS;
@@ -630,6 +631,7 @@ NTSTATUS pvfs_resolve_partial(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
 	(*name)->original_name = talloc_strdup(*name, fname);
 	(*name)->stream_name = NULL;
 	(*name)->stream_id = 0;
+	(*name)->allow_override = false;
 
 	status = pvfs_fill_dos_info(pvfs, *name, flags, -1);
 
@@ -815,6 +817,7 @@ NTSTATUS pvfs_resolve_parent(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
 	}
 	(*name)->stream_name = NULL;
 	(*name)->stream_id = 0;
+	(*name)->allow_override = false;
 
 	status = pvfs_fill_dos_info(pvfs, *name, PVFS_RESOLVE_NO_OPENDB, -1);
 
diff --git a/source4/ntvfs/posix/pvfs_setfileinfo.c b/source4/ntvfs/posix/pvfs_setfileinfo.c
index cbb5c7853c..3c9b18d91c 100644
--- a/source4/ntvfs/posix/pvfs_setfileinfo.c
+++ b/source4/ntvfs/posix/pvfs_setfileinfo.c
@@ -534,7 +534,7 @@ NTSTATUS pvfs_setfileinfo(struct ntvfs_module_context *ntvfs,
 		}
 		mode = pvfs_fileperms(pvfs, newstats.dos.attrib);
 		if (!(h->name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)) {
-			if (pvfs_sys_fchmod(pvfs, h->fd, mode) == -1) {
+			if (pvfs_sys_fchmod(pvfs, h->fd, mode, h->name->allow_override) == -1) {
 				return pvfs_map_errno(pvfs, errno);
 			}
 		}
@@ -859,7 +859,7 @@ NTSTATUS pvfs_setpathinfo(struct ntvfs_module_context *ntvfs,
 	newstats.dos.attrib |= (name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY);
 	if (newstats.dos.attrib != name->dos.attrib) {
 		mode_t mode = pvfs_fileperms(pvfs, newstats.dos.attrib);
-		if (pvfs_sys_chmod(pvfs, name->full_name, mode) == -1) {
+		if (pvfs_sys_chmod(pvfs, name->full_name, mode, name->allow_override) == -1) {
 			return pvfs_map_errno(pvfs, errno);
 		}
 		change_mask |= FILE_NOTIFY_CHANGE_ATTRIBUTES;
diff --git a/source4/ntvfs/posix/pvfs_sys.c b/source4/ntvfs/posix/pvfs_sys.c
index f110590153..9112848bfe 100644
--- a/source4/ntvfs/posix/pvfs_sys.c
+++ b/source4/ntvfs/posix/pvfs_sys.c
@@ -256,7 +256,7 @@ static int pvfs_sys_chown(struct pvfs_state *pvfs, struct pvfs_sys_ctx *ctx, con
 /*
   wrap open for system override
 */
-int pvfs_sys_open(struct pvfs_state *pvfs, const char *filename, int flags, mode_t mode)
+int pvfs_sys_open(struct pvfs_state *pvfs, const char *filename, int flags, mode_t mode, bool allow_override)
 {
 	int fd, ret;
 	struct pvfs_sys_ctx *ctx;
@@ -267,7 +267,7 @@ int pvfs_sys_open(struct pvfs_state *pvfs, const char *filename, int flags, mode
 
 	fd = open(filename, flags, mode);
 	if (fd != -1 ||
-	    !(pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) ||
+	    !allow_override ||
 	    errno != EACCES) {
 		return fd;
 	}
@@ -366,7 +366,7 @@ int pvfs_sys_open(struct pvfs_state *pvfs, const char *filename, int flags, mode
 /*
   wrap unlink for system override
 */
-int pvfs_sys_unlink(struct pvfs_state *pvfs, const char *filename)
+int pvfs_sys_unlink(struct pvfs_state *pvfs, const char *filename, bool allow_override)
 {
 	int ret;
 	struct pvfs_sys_ctx *ctx;
@@ -376,7 +376,7 @@ int pvfs_sys_unlink(struct pvfs_state *pvfs, const char *filename)
 
 	ret = unlink(filename);
 	if (ret != -1 ||
-	    !(pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) ||
+	    !allow_override ||
 	    errno != EACCES) {
 		return ret;
 	}
@@ -415,7 +415,7 @@ static bool contains_symlink(const char *path)
 /*
   wrap rename for system override
 */
-int pvfs_sys_rename(struct pvfs_state *pvfs, const char *name1, const char *name2)
+int pvfs_sys_rename(struct pvfs_state *pvfs, const char *name1, const char *name2, bool allow_override)
 {
 	int ret;
 	struct pvfs_sys_ctx *ctx;
@@ -425,7 +425,7 @@ int pvfs_sys_rename(struct pvfs_state *pvfs, const char *name1, const char *name
 
 	ret = rename(name1, name2);
 	if (ret != -1 ||
-	    !(pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) ||
+	    !allow_override ||
 	    errno != EACCES) {
 		return ret;
 	}
@@ -480,7 +480,7 @@ int pvfs_sys_rename(struct pvfs_state *pvfs, const char *name1, const char *name
 /*
   wrap mkdir for system override
 */
-int pvfs_sys_mkdir(struct pvfs_state *pvfs, const char *dirname, mode_t mode)
+int pvfs_sys_mkdir(struct pvfs_state *pvfs, const char *dirname, mode_t mode, bool allow_override)
 {
 	int ret;
 	struct pvfs_sys_ctx *ctx;
@@ -490,7 +490,7 @@ int pvfs_sys_mkdir(struct pvfs_state *pvfs, const char *dirname, mode_t mode)
 
 	ret = mkdir(dirname, mode);
 	if (ret != -1 ||
-	    !(pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) ||
+	    !allow_override ||
 	    errno != EACCES) {
 		return ret;
 	}
@@ -525,7 +525,7 @@ int pvfs_sys_mkdir(struct pvfs_state *pvfs, const char *dirname, mode_t mode)
 /*
   wrap rmdir for system override
 */
-int pvfs_sys_rmdir(struct pvfs_state *pvfs, const char *dirname)
+int pvfs_sys_rmdir(struct pvfs_state *pvfs, const char *dirname, bool allow_override)
 {
 	int ret;
 	struct pvfs_sys_ctx *ctx;
@@ -535,7 +535,7 @@ int pvfs_sys_rmdir(struct pvfs_state *pvfs, const char *dirname)
 
 	ret = rmdir(dirname);
 	if (ret != -1 ||
-	    !(pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) ||
+	    !allow_override ||
 	    errno != EACCES) {
 		return ret;
 	}
@@ -563,7 +563,7 @@ int pvfs_sys_rmdir(struct pvfs_state *pvfs, const char *dirname)
 /*
   wrap fchmod for system override
 */
-int pvfs_sys_fchmod(struct pvfs_state *pvfs, int fd, mode_t mode)
+int pvfs_sys_fchmod(struct pvfs_state *pvfs, int fd, mode_t mode, bool allow_override)
 {
 	int ret;
 	struct pvfs_sys_ctx *ctx;
@@ -573,7 +573,7 @@ int pvfs_sys_fchmod(struct pvfs_state *pvfs, int fd, mode_t mode)
 
 	ret = fchmod(fd, mode);
 	if (ret != -1 ||
-	    !(pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) ||
+	    !allow_override ||
 	    errno != EACCES) {
 		return ret;
 	}
@@ -602,7 +602,7 @@ int pvfs_sys_fchmod(struct pvfs_state *pvfs, int fd, mode_t mode)
 /*
   wrap chmod for system override
 */
-int pvfs_sys_chmod(struct pvfs_state *pvfs, const char *filename, mode_t mode)
+int pvfs_sys_chmod(struct pvfs_state *pvfs, const char *filename, mode_t mode, bool allow_override)
 {
 	int ret;
 	struct pvfs_sys_ctx *ctx;
@@ -612,7 +612,7 @@ int pvfs_sys_chmod(struct pvfs_state *pvfs, const char *filename, mode_t mode)
 
 	ret = chmod(filename, mode);
 	if (ret != -1 ||
-	    !(pvfs->flags & PVFS_FLAG_PERM_OVERRIDE) ||
+	    !allow_override ||
 	    errno != EACCES) {
 		return ret;
 	}
diff --git a/source4/ntvfs/posix/pvfs_unlink.c b/source4/ntvfs/posix/pvfs_unlink.c
index be2ba53148..a4b51d1d7d 100644
--- a/source4/ntvfs/posix/pvfs_unlink.c
+++ b/source4/ntvfs/posix/pvfs_unlink.c
@@ -123,7 +123,7 @@ static NTSTATUS pvfs_unlink_file(struct pvfs_state *pvfs,
 	}
 
 	/* finally try the actual unlink */
-	if (pvfs_sys_unlink(pvfs, name->full_name) == -1) {
+	if (pvfs_sys_unlink(pvfs, name->full_name, name->allow_override) == -1) {
 		status = pvfs_map_errno(pvfs, errno);
 	}
 
diff --git a/source4/ntvfs/posix/pvfs_util.c b/source4/ntvfs/posix/pvfs_util.c
index c6c6eaa13c..6afb928d73 100644
--- a/source4/ntvfs/posix/pvfs_util.c
+++ b/source4/ntvfs/posix/pvfs_util.c
@@ -90,7 +90,8 @@ uint32_t pvfs_attrib_normalise(uint32_t attrib, mode_t mode)
 */
 NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs,
 			struct pvfs_filename *name1, 
-			struct pvfs_filename *name2)
+			struct pvfs_filename *name2,
+			bool allow_override)
 {
 	int fd1, fd2;
 	mode_t mode;
@@ -102,13 +103,13 @@ NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs,
 		return NT_STATUS_NO_MEMORY;
 	}
 
-	fd1 = pvfs_sys_open(pvfs, name1->full_name, O_RDONLY, 0);
+	fd1 = pvfs_sys_open(pvfs, name1->full_name, O_RDONLY, 0, allow_override);
 	if (fd1 == -1) {
 		talloc_free(buf);
 		return pvfs_map_errno(pvfs, errno);
 	}
 
-	fd2 = pvfs_sys_open(pvfs, name2->full_name, O_CREAT|O_EXCL|O_WRONLY, 0);
+	fd2 = pvfs_sys_open(pvfs, name2->full_name, O_CREAT|O_EXCL|O_WRONLY, 0, allow_override);
 	if (fd2 == -1) {
 		close(fd1);
 		talloc_free(buf);
@@ -133,7 +134,7 @@ NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs,
 			close(fd1);
 			close(fd2);
 			talloc_free(buf);
-			pvfs_sys_unlink(pvfs, name2->full_name);
+			pvfs_sys_unlink(pvfs, name2->full_name, allow_override);
 			if (ret2 == -1) {
 				return pvfs_map_errno(pvfs, errno);
 			}
@@ -145,10 +146,10 @@ NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs,
 	close(fd1);
 
 	mode = pvfs_fileperms(pvfs, name1->dos.attrib);
-	if (pvfs_sys_fchmod(pvfs, fd2, mode) == -1) {
+	if (pvfs_sys_fchmod(pvfs, fd2, mode, allow_override) == -1) {
 		status = pvfs_map_errno(pvfs, errno);
 		close(fd2);
-		pvfs_sys_unlink(pvfs, name2->full_name);
+		pvfs_sys_unlink(pvfs, name2->full_name, allow_override);
 		return status;
 	}
 
@@ -158,7 +159,7 @@ NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs,
 	status = pvfs_dosattrib_save(pvfs, name2, fd2);
 	if (!NT_STATUS_IS_OK(status)) {
 		close(fd2);
-		pvfs_sys_unlink(pvfs, name2->full_name);
+		pvfs_sys_unlink(pvfs, name2->full_name, allow_override);
 		return status;
 	}
 
diff --git a/source4/ntvfs/posix/vfs_posix.h b/source4/ntvfs/posix/vfs_posix.h
index e1593a38cf..9a03658040 100644
--- a/source4/ntvfs/posix/vfs_posix.h
+++ b/source4/ntvfs/posix/vfs_posix.h
@@ -131,6 +131,7 @@ struct pvfs_filename {
 	bool has_wildcard;
 	bool exists;          /* true if the base filename exists */
 	bool stream_exists;   /* true if the stream exists */
+	bool allow_override;
 	struct stat st;
 	struct pvfs_dos_fileinfo dos;
 };