From ae7caf08c1f47f3ad08856cfea2a3e6e956b48ab Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Wed, 17 Nov 2004 05:58:04 +0000
Subject: r3798: added support for alternate data streams in xattrs into pvfs.

The trickiest part about this was getting the sharing and locking
rules right, as alternate streams are separate locking spaces from the
main file for the purposes of byte range locking, and separate for
most share violation rules.

I suspect there are still problems with delete on close with alternate
data streams. I'll look at that next.
(This used to be commit b6452c4a2068cf7e837778559da002ae191b508a)
---
 source4/ntvfs/posix/pvfs_xattr.c | 115 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 113 insertions(+), 2 deletions(-)

(limited to 'source4/ntvfs/posix/pvfs_xattr.c')

diff --git a/source4/ntvfs/posix/pvfs_xattr.c b/source4/ntvfs/posix/pvfs_xattr.c
index 269a2cc863..ff0c0f5116 100644
--- a/source4/ntvfs/posix/pvfs_xattr.c
+++ b/source4/ntvfs/posix/pvfs_xattr.c
@@ -100,6 +100,31 @@ static NTSTATUS push_xattr_blob(struct pvfs_state *pvfs,
 #endif
 }
 
+
+/*
+  delete a xattr
+*/
+static NTSTATUS delete_xattr(struct pvfs_state *pvfs, const char *attr_name, 
+			     const char *fname, int fd)
+{
+#if HAVE_XATTR_SUPPORT
+	int ret;
+
+	if (fd != -1) {
+		ret = fremovexattr(fd, attr_name);
+	} else {
+		ret = removexattr(fname, attr_name);
+	}
+	if (ret == -1) {
+		return pvfs_map_errno(pvfs, errno);
+	}
+
+	return NT_STATUS_OK;
+#else
+	return NT_STATUS_NOT_SUPPORTED;
+#endif
+}
+
 /*
   load a NDR structure from a xattr
 */
@@ -159,6 +184,12 @@ NTSTATUS pvfs_dosattrib_load(struct pvfs_state *pvfs, struct pvfs_filename *name
 	TALLOC_CTX *mem_ctx = talloc(name, 0);
 	struct xattr_DosInfo1 *info1;
 
+	if (name->stream_name != NULL) {
+		name->stream_exists = False;
+	} else {
+		name->stream_exists = True;
+	}
+
 	if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE)) {
 		return NT_STATUS_OK;
 	}
@@ -209,9 +240,11 @@ NTSTATUS pvfs_dosattrib_load(struct pvfs_state *pvfs, struct pvfs_filename *name
 		talloc_free(mem_ctx);
 		return NT_STATUS_INVALID_LEVEL;
 	}
-
 	talloc_free(mem_ctx);
-	return NT_STATUS_OK;
+	
+	status = pvfs_stream_info(pvfs, name, fd);
+
+	return status;
 }
 
 
@@ -313,3 +346,81 @@ NTSTATUS pvfs_streams_save(struct pvfs_state *pvfs, struct pvfs_filename *name,
 				   streams, 
 				   (ndr_push_flags_fn_t)ndr_push_xattr_DosStreams);
 }
+
+/*
+  create a zero length xattr with the given name
+*/
+NTSTATUS pvfs_xattr_create(struct pvfs_state *pvfs, 
+			   const char *fname, int fd,
+			   const char *attr_prefix,
+			   const char *attr_name)
+{
+	NTSTATUS status;
+	DATA_BLOB blob = data_blob(NULL, 0);
+	char *aname = talloc_asprintf(NULL, "%s%s", attr_prefix, attr_name);
+	if (aname == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	status = push_xattr_blob(pvfs, aname, fname, fd, &blob);
+	talloc_free(aname);
+	return status;
+}
+
+
+/*
+  delete a xattr with the given name
+*/
+NTSTATUS pvfs_xattr_delete(struct pvfs_state *pvfs, 
+			   const char *fname, int fd,
+			   const char *attr_prefix,
+			   const char *attr_name)
+{
+	NTSTATUS status;
+	char *aname = talloc_asprintf(NULL, "%s%s", attr_prefix, attr_name);
+	if (aname == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	status = delete_xattr(pvfs, aname, fname, fd);
+	talloc_free(aname);
+	return status;
+}
+
+/*
+  load a xattr with the given name
+*/
+NTSTATUS pvfs_xattr_load(struct pvfs_state *pvfs, 
+			 TALLOC_CTX *mem_ctx,
+			 const char *fname, int fd,
+			 const char *attr_prefix,
+			 const char *attr_name,
+			 size_t estimated_size,
+			 DATA_BLOB *blob)
+{
+	NTSTATUS status;
+	char *aname = talloc_asprintf(mem_ctx, "%s%s", attr_prefix, attr_name);
+	if (aname == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	status = pull_xattr_blob(pvfs, mem_ctx, aname, fname, fd, estimated_size, blob);
+	talloc_free(aname);
+	return status;
+}
+
+/*
+  save a xattr with the given name
+*/
+NTSTATUS pvfs_xattr_save(struct pvfs_state *pvfs, 
+			 const char *fname, int fd,
+			 const char *attr_prefix,
+			 const char *attr_name,
+			 const DATA_BLOB *blob)
+{
+	NTSTATUS status;
+	char *aname = talloc_asprintf(NULL, "%s%s", attr_prefix, attr_name);
+	if (aname == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	status = push_xattr_blob(pvfs, aname, fname, fd, blob);
+	talloc_free(aname);
+	return status;
+}
-- 
cgit