r8535: no longer rely on seekdir working after a closedir. Instead, keep

directories open, but close search states based on an inactivity
timer, with a default of a 5 minute timeout
(This used to be commit 2e8d154e7dfb9b320a1344e957a39e96e1eefadd)

4 files changed, 35 insertions, 62 deletions

diff --git a/source4/ntvfs/posix/pvfs_dirlist.c b/source4/ntvfs/posix/pvfs_dirlist.c
index 1b60f17462..328d07f71b 100644
--- a/source4/ntvfs/posix/pvfs_dirlist.c
+++ b/source4/ntvfs/posix/pvfs_dirlist.c
@@ -194,58 +194,16 @@ const char *pvfs_list_next(struct pvfs_dir *dir, uint_t *ofs)
 
 		if (e->name) talloc_free(e->name);
 
-		e->name = talloc_strdup(dir, de->d_name);
+		e->name = talloc_strdup(dir->name_cache, de->d_name);
 		e->offset = dir->offset;
 
 		return e->name;
 	}
 
 	dir->end_of_search = True;
-	pvfs_list_hibernate(dir);
 	return NULL;
 }
 
-/* 
-   put the directory to sleep. Used between search calls to give the
-   right directory change semantics
-*/
-void pvfs_list_hibernate(struct pvfs_dir *dir)
-{
-	if (dir->dir) {
-		closedir(dir->dir);
-		dir->dir = NULL;
-	}
-}
-
-
-/* 
-   wake up the directory search
-*/
-NTSTATUS pvfs_list_wakeup(struct pvfs_dir *dir, uint_t *ofs)
-{
-	if (dir->no_wildcard ||
-	    dir->dir != NULL) {
-		return NT_STATUS_OK;
-	}
-
-	dir->dir = opendir(dir->unix_path);
-	if (dir->dir == NULL) {
-		dir->end_of_search = True;
-		return pvfs_map_errno(dir->pvfs, errno);
-	}
-
-	seekdir(dir->dir, *ofs);
-	dir->offset = telldir(dir->dir);
-	if (dir->offset != *ofs) {
-		DEBUG(0,("pvfs_list_wakeup: search offset changed %u -> %u\n", 
-			 *ofs, (unsigned)dir->offset));
-	}
-
-	return NT_STATUS_OK;
-}
-
-
-
 /*
   return unix directory of an open search
 */
@@ -268,14 +226,8 @@ BOOL pvfs_list_eos(struct pvfs_dir *dir, uint_t ofs)
 NTSTATUS pvfs_list_seek(struct pvfs_dir *dir, const char *name, uint_t *ofs)
 {
 	struct dirent *de;
-	NTSTATUS status;
 	int i;
 
-	status = pvfs_list_wakeup(dir, ofs);
-	if (!NT_STATUS_IS_OK(status)) {
-		return status;
-	}
-
 	for (i=dir->name_cache_index;i>=0;i--) {
 		struct name_cache_entry *e = &dir->name_cache[i];
 		if (e->name && StrCaseCmp(name, e->name) == 0) {
@@ -303,7 +255,5 @@ NTSTATUS pvfs_list_seek(struct pvfs_dir *dir, const char *name, uint_t *ofs)
 
 	dir->end_of_search = True;
 
-	pvfs_list_hibernate(dir);
-
 	return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 }
diff --git a/source4/ntvfs/posix/pvfs_search.c b/source4/ntvfs/posix/pvfs_search.c
index 69ca6ef997..db197c7b62 100644
--- a/source4/ntvfs/posix/pvfs_search.c
+++ b/source4/ntvfs/posix/pvfs_search.c
@@ -24,6 +24,8 @@
 #include "vfs_posix.h"
 #include "system/time.h"
 #include "librpc/gen_ndr/ndr_security.h"
+#include "smbd/service_stream.h"
+#include "lib/events/events.h"
 
 
 /* the state of a search started with pvfs_search_first() */
@@ -37,6 +39,7 @@ struct pvfs_search_state {
 	time_t last_used;
 	uint_t num_ea_names;
 	struct ea_name *ea_names;
+	struct timed_event *te;
 };
 
 
@@ -55,6 +58,28 @@ static int pvfs_search_destructor(void *ptr)
 }
 
 /*
+  called when a search timer goes off
+*/
+static void pvfs_search_timer(struct event_context *ev, struct timed_event *te, 
+				      struct timeval t, void *ptr)
+{
+	struct pvfs_search_state *search = talloc_get_type(ptr, struct pvfs_search_state);
+	talloc_free(search);
+}
+
+/*
+  setup a timer to destroy a open search after a inactivity period
+*/
+static void pvfs_search_setup_timer(struct pvfs_search_state *search)
+{
+	struct event_context *ev = search->pvfs->tcon->smb_conn->connection->event.ctx;
+	talloc_free(search->te);
+	search->te = event_add_timed(ev, search, 
+				     timeval_current_ofs(search->pvfs->search_inactivity_time, 0), 
+				     pvfs_search_timer, search);
+}
+
+/*
   fill in a single search result for a given info level
 */
 static NTSTATUS fill_search_info(struct pvfs_state *pvfs,
@@ -266,7 +291,7 @@ static NTSTATUS pvfs_search_fill(struct pvfs_state *pvfs, TALLOC_CTX *mem_ctx,
 		talloc_free(file);
 	}
 
-	pvfs_list_hibernate(dir);
+	pvfs_search_setup_timer(search);
 
 	return NT_STATUS_OK;
 }
@@ -362,6 +387,7 @@ static NTSTATUS pvfs_search_first_old(struct ntvfs_module_context *ntvfs,
 	search->search_attrib = search_attrib & 0xFF;
 	search->must_attrib = (search_attrib>>8) & 0xFF;
 	search->last_used = time(NULL);
+	search->te = NULL;
 
 	talloc_set_destructor(search, pvfs_search_destructor);
 
@@ -409,11 +435,6 @@ static NTSTATUS pvfs_search_next_old(struct ntvfs_module_context *ntvfs,
 	search->last_used = time(NULL);
 	dir = search->dir;
 
-	status = pvfs_list_wakeup(dir, &search->current_index);
-	if (!NT_STATUS_IS_OK(status)) {
-		return status;
-	}
-
 	status = pvfs_search_fill(pvfs, req, max_count, search, io->generic.level,
 				  &reply_count, search_private, callback);
 	if (!NT_STATUS_IS_OK(status)) {
@@ -499,6 +520,7 @@ NTSTATUS pvfs_search_first(struct ntvfs_module_context *ntvfs,
 	search->last_used = 0;
 	search->num_ea_names = io->t2ffirst.in.num_names;
 	search->ea_names = io->t2ffirst.in.ea_names;
+	search->te = NULL;
 
 	talloc_set_destructor(search, pvfs_search_destructor);
 
@@ -573,11 +595,6 @@ NTSTATUS pvfs_search_next(struct ntvfs_module_context *ntvfs,
 		search->current_index = io->t2fnext.in.resume_key;
 	}
 
-	status = pvfs_list_wakeup(dir, &search->current_index);
-	if (!NT_STATUS_IS_OK(status)) {
-		return status;
-	}
-
 	search->num_ea_names = io->t2fnext.in.num_names;
 	search->ea_names = io->t2fnext.in.ea_names;
 
diff --git a/source4/ntvfs/posix/vfs_posix.c b/source4/ntvfs/posix/vfs_posix.c
index ac12f3853f..a4b15e3c57 100644
--- a/source4/ntvfs/posix/vfs_posix.c
+++ b/source4/ntvfs/posix/vfs_posix.c
@@ -55,6 +55,9 @@ static void pvfs_setup_options(struct pvfs_state *pvfs)
 	pvfs->alloc_size_rounding = lp_parm_int(snum, 
 						"posix", "allocationrounding", 512);
 
+	pvfs->search_inactivity_time = lp_parm_int(snum, 
+						   "posix", "searchinactivity", 300);
+
 #if HAVE_XATTR_SUPPORT
 	if (lp_parm_bool(snum, "posix", "xattr", True)) pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
 #endif
diff --git a/source4/ntvfs/posix/vfs_posix.h b/source4/ntvfs/posix/vfs_posix.h
index b5b0e2b28d..f18864197d 100644
--- a/source4/ntvfs/posix/vfs_posix.h
+++ b/source4/ntvfs/posix/vfs_posix.h
@@ -74,6 +74,9 @@ struct pvfs_state {
 
 	/* the allocation size rounding */
 	uint32_t alloc_size_rounding;
+
+	/* how long to keep inactive searches around for */
+	uint_t search_inactivity_time;
 	
 	/* used to accelerate acl mapping */
 	struct {