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-rw-r--r--xlators/performance/stat-prefetch/src/stat-prefetch.c116
1 files changed, 104 insertions, 12 deletions
diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.c b/xlators/performance/stat-prefetch/src/stat-prefetch.c
index b4e6b379c..258d92c68 100644
--- a/xlators/performance/stat-prefetch/src/stat-prefetch.c
+++ b/xlators/performance/stat-prefetch/src/stat-prefetch.c
@@ -772,6 +772,77 @@ out:
return inode_ctx;
}
+
+int32_t
+sp_lookup_helper (call_frame_t *frame,xlator_t *this, loc_t *loc,
+ dict_t *xattr_req)
+{
+ uint64_t value = 0;
+ sp_inode_ctx_t *inode_ctx = NULL;
+ int32_t ret = 0, op_ret = -1, op_errno = -1;
+ call_stub_t *stub = NULL;
+ char can_wind = 0;
+
+ ret = inode_ctx_get (loc->inode, this, &value);
+ if (ret == -1) {
+ gf_log (this->name, GF_LOG_DEBUG, "context not set in inode "
+ "(%p)", loc->inode);
+ op_errno = EINVAL;
+ goto unwind;
+ }
+
+ inode_ctx = (sp_inode_ctx_t *)(long) value;
+ GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, inode_ctx, unwind, op_errno,
+ EINVAL);
+
+ stub = fop_lookup_stub (frame, sp_lookup_helper, loc,
+ xattr_req);
+ GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, stub, unwind,
+ op_errno, ENOMEM);
+
+ LOCK (&inode_ctx->lock);
+ {
+ op_ret = inode_ctx->op_ret;
+ op_errno = inode_ctx->op_errno;
+ if (op_ret == 0) {
+ if (!inode_ctx->lookup_in_progress) {
+ inode_ctx->lookup_in_progress = 1;
+ can_wind = 1;
+ } else {
+ list_add_tail (&stub->list,
+ &inode_ctx->waiting_ops);
+ stub = NULL;
+ }
+ }
+ }
+ UNLOCK (&inode_ctx->lock);
+
+ if (op_ret == -1) {
+ goto unwind;
+ }
+
+ if (can_wind) {
+ STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lookup, loc,
+ xattr_req);
+ }
+
+ if (stub != NULL) {
+ call_stub_destroy (stub);
+ }
+
+ return 0;
+
+unwind:
+ SP_STACK_UNWIND (frame, -1, op_errno, NULL, NULL, NULL);
+ if (stub != NULL) {
+ call_stub_destroy (stub);
+ }
+
+ return 0;
+}
+
+
/*
* TODO: implement sending lookups for every fop done on this path. As of now
* lookup on the path is sent only for the first fop on this path.
@@ -785,11 +856,12 @@ sp_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr_req)
int32_t ret = -1, op_ret = -1, op_errno = EINVAL;
sp_cache_t *cache = NULL;
struct stat buf = {0, };
- char entry_cached = 0;
+ char entry_cached = 0, can_wind = 0;
char xattr_req_empty = 1;
sp_inode_ctx_t *inode_ctx = NULL;
uint64_t value = 0;
sp_local_t *local = NULL;
+ call_stub_t *stub = NULL;
if (loc == NULL || loc->inode == NULL) {
goto unwind;
@@ -867,14 +939,10 @@ wind:
sp_cache_unref (cache);
}
- LOCK (&inode_ctx->lock);
- {
- if (!(inode_ctx->looked_up
- || inode_ctx->lookup_in_progress)) {
- inode_ctx->lookup_in_progress = 1;
- }
- }
- UNLOCK (&inode_ctx->lock);
+ stub = fop_lookup_stub (frame, sp_lookup_helper, loc,
+ xattr_req);
+ GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, stub, unwind,
+ op_errno, ENOMEM);
local = CALLOC (1, sizeof (*local));
GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local,
@@ -892,9 +960,33 @@ wind:
local->is_lookup = 1;
- STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
- FIRST_CHILD(this)->fops->lookup, loc, xattr_req);
-
+ LOCK (&inode_ctx->lock);
+ {
+ if (inode_ctx->lookup_in_progress) {
+ list_add_tail (&stub->list,
+ &inode_ctx->waiting_ops);
+ stub = NULL;
+ } else {
+ can_wind = 1;
+ }
+
+ if (!(inode_ctx->looked_up
+ || inode_ctx->lookup_in_progress)) {
+ inode_ctx->lookup_in_progress = 1;
+ }
+ }
+ UNLOCK (&inode_ctx->lock);
+
+ if (can_wind) {
+ STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lookup, loc,
+ xattr_req);
+ }
+
+ if (stub != NULL) {
+ call_stub_destroy (stub);
+ }
+
return 0;
}