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authorBrian Foster <bfoster@redhat.com>2012-07-16 13:51:09 -0400
committerAnand Avati <avati@redhat.com>2012-07-17 08:11:48 -0700
commit59ff893d11844eb52453ce4f7f098df05fcde174 (patch)
tree25d332376a461e09770e7dfdd88e7cfc13efea4b /xlators/mount/fuse/src
parent911603eb0e1c85e79cf261f99f442c833ead8178 (diff)
libglusterfs,mount/fuse: implement gidcache mechanism in fuse-bridge
This change genericizes the cache mechanism implemented in commit 8efd2845 into libglusterfs/src/gidcache.[ch] and adds fuse-bridge as a client. The cache mechanism is fundamentally equivalent, with some minor changes: - Change cache key from uid_t to uint64_t. - Modify the cache add logic to locate and use an entry with a matching ID, should it already exist. This addresses a bug in the existing mechanism where an expired entry supercedes a newly added entry in lookup, causing repeated adds and flushing of a cache bucket. The fuse group cache is disabled by default. It can be enabled via the 'gid-timeout' fuse-bridge translator option and accompanying mount option (i.e., '-o gid-timeout=1' for a 1s entry timeout). BUG: 800892 Change-Id: I0b34a2263ca48dbb154790a4a44fc70b733e9114 Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-on: http://review.gluster.com/3676 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/mount/fuse/src')
-rw-r--r--xlators/mount/fuse/src/fuse-bridge.c13
-rw-r--r--xlators/mount/fuse/src/fuse-bridge.h3
-rw-r--r--xlators/mount/fuse/src/fuse-helpers.c42
-rw-r--r--xlators/mount/fuse/src/fuse-mem-types.h1
4 files changed, 58 insertions, 1 deletions
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 360e1443cf2..3a620ac7e7f 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -4604,6 +4604,15 @@ init (xlator_t *this_xl)
GF_OPTION_INIT("fopen-keep-cache", priv->fopen_keep_cache, bool,
cleanup_exit);
+ GF_OPTION_INIT("gid-timeout", priv->gid_cache_timeout, int32,
+ cleanup_exit);
+
+ if (gid_cache_init(&priv->gid_cache, priv->gid_cache_timeout) < 0) {
+ gf_log("glusterfs-fuse", GF_LOG_ERROR, "Failed to initialize "
+ "group cache.");
+ goto cleanup_exit;
+ }
+
cmd_args = &this_xl->ctx->cmd_args;
fsname = cmd_args->volfile;
if (!fsname && cmd_args->volfile_server) {
@@ -4768,5 +4777,9 @@ struct volume_options options[] = {
.type = GF_OPTION_TYPE_BOOL,
.default_value = "false"
},
+ { .key = {"gid-timeout"},
+ .type = GF_OPTION_TYPE_INT,
+ .default_value = "0"
+ },
{ .key = {NULL} },
};
diff --git a/xlators/mount/fuse/src/fuse-bridge.h b/xlators/mount/fuse/src/fuse-bridge.h
index dcd9629246c..bc35eb0617d 100644
--- a/xlators/mount/fuse/src/fuse-bridge.h
+++ b/xlators/mount/fuse/src/fuse-bridge.h
@@ -55,6 +55,7 @@
#include "list.h"
#include "dict.h"
#include "syncop.h"
+#include "gidcache.h"
#if defined(GF_LINUX_HOST_OS) || defined(__NetBSD__)
#define FUSE_OP_HIGH (FUSE_POLL + 1)
@@ -110,7 +111,9 @@ struct fuse_private {
gf_boolean_t selinux;
gf_boolean_t read_only;
gf_boolean_t fopen_keep_cache;
+ int32_t gid_cache_timeout;
fdtable_t *fdtable;
+ gid_cache_t gid_cache;
/* For fuse-reverse-validation */
int revchan_in;
diff --git a/xlators/mount/fuse/src/fuse-helpers.c b/xlators/mount/fuse/src/fuse-helpers.c
index bcad97fc742..729c8fb2cd4 100644
--- a/xlators/mount/fuse/src/fuse-helpers.c
+++ b/xlators/mount/fuse/src/fuse-helpers.c
@@ -245,6 +245,46 @@ out:
#endif /* GF_LINUX_HOST_OS */
}
+/*
+ * Get the groups for the PID associated with this frame. If enabled,
+ * use the gid cache to reduce group list collection.
+ */
+static void get_groups(fuse_private_t *priv, call_frame_t *frame)
+{
+ int i;
+ const gid_list_t *gl;
+ gid_list_t agl;
+
+ if (!priv->gid_cache_timeout) {
+ frame_fill_groups(frame);
+ return;
+ }
+
+ gl = gid_cache_lookup(&priv->gid_cache, frame->root->pid);
+ if (gl) {
+ frame->root->ngrps = gl->gl_count;
+ for (i = 0; i < gl->gl_count; i++)
+ frame->root->groups[i] = gl->gl_list[i];
+ gid_cache_release(&priv->gid_cache, gl);
+ return;
+ }
+
+ frame_fill_groups (frame);
+
+ agl.gl_id = frame->root->pid;
+ agl.gl_count = frame->root->ngrps;
+ agl.gl_list = GF_CALLOC(frame->root->ngrps, sizeof(gid_t),
+ gf_fuse_mt_gids_t);
+ if (!agl.gl_list)
+ return;
+
+ for (i = 0; i < frame->root->ngrps; i++)
+ agl.gl_list[i] = frame->root->groups[i];
+
+ if (gid_cache_add(&priv->gid_cache, &agl) != 1)
+ GF_FREE(agl.gl_list);
+}
+
call_frame_t *
get_call_frame_for_req (fuse_state_t *state)
{
@@ -272,7 +312,7 @@ get_call_frame_for_req (fuse_state_t *state)
state->lk_owner);
}
- frame_fill_groups (frame);
+ get_groups(priv, frame);
if (priv && priv->client_pid_set)
frame->root->pid = priv->client_pid;
diff --git a/xlators/mount/fuse/src/fuse-mem-types.h b/xlators/mount/fuse/src/fuse-mem-types.h
index 9c6a1c67a7a..d1c5e511b0e 100644
--- a/xlators/mount/fuse/src/fuse-mem-types.h
+++ b/xlators/mount/fuse/src/fuse-mem-types.h
@@ -31,6 +31,7 @@ enum gf_fuse_mem_types_ {
gf_fuse_mt_fuse_state_t,
gf_fuse_mt_fd_ctx_t,
gf_fuse_mt_graph_switch_args_t,
+ gf_fuse_mt_gids_t,
gf_fuse_mt_end
};
#endif