quick-read: implement qr_fentrylk.

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/xlators/performance/quick-read/src/quick-read.c b/xlators/performance/quick-read/src/quick-read.c
index 4b2e58ea014..ae2adaccd9d 100644
--- a/xlators/performance/quick-read/src/quick-read.c
+++ b/xlators/performance/quick-read/src/quick-read.c
@@ -1547,6 +1547,105 @@ qr_flush (call_frame_t *frame, xlator_t *this, fd_t *fd)
 }
 
 
+int32_t
+qr_fentrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                 int32_t op_ret, int32_t op_errno)
+{
+	STACK_UNWIND (frame, op_ret, op_errno);
+	return 0;
+}
+
+int32_t
+qr_fentrylk_helper (call_frame_t *frame, xlator_t *this, const char *volume,
+                    fd_t *fd, const char *basename, entrylk_cmd cmd,
+                    entrylk_type type)
+{
+        STACK_WIND(frame, qr_fentrylk_cbk, FIRST_CHILD(this),
+                   FIRST_CHILD(this)->fops->fentrylk, volume, fd, basename,
+                   cmd, type);
+        return 0;
+}
+
+
+int32_t
+qr_fentrylk (call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd,
+             const char *basename, entrylk_cmd cmd, entrylk_type type)
+{
+        int          flags = 0;
+        uint64_t     value = 0;
+        call_stub_t *stub = NULL;  
+        char        *path = NULL;
+        loc_t        loc = {0, };
+        qr_fd_ctx_t *qr_fd_ctx = NULL;
+        int32_t      ret = -1, op_ret = -1, op_errno = -1;
+        char         need_open = 0, can_wind = 0, need_unwind = 0;
+
+        ret = fd_ctx_get (fd, this, &value);
+        if (ret == 0) {
+                qr_fd_ctx = (qr_fd_ctx_t *)(long)value;
+        }
+
+        if (qr_fd_ctx) {
+                LOCK (&qr_fd_ctx->lock);
+                {
+                        path = qr_fd_ctx->path;
+                        flags = qr_fd_ctx->flags;
+                        
+                        if (!(qr_fd_ctx->opened
+                              || qr_fd_ctx->open_in_transit)) {
+                                need_open = 1;
+                                qr_fd_ctx->open_in_transit = 1;
+                        }
+
+                        if (qr_fd_ctx->opened) {
+                                can_wind = 1;
+                        } else {
+                                stub = fop_fentrylk_stub (frame,
+                                                          qr_fentrylk_helper,
+                                                          volume, fd, basename,
+                                                          cmd, type);
+                                if (stub == NULL) {
+                                        op_ret = -1;
+                                        op_errno = ENOMEM;
+                                        need_unwind = 1;
+                                        qr_fd_ctx->open_in_transit = 0;
+                                        goto unlock;
+                                }
+
+                                list_add_tail (&stub->list,
+                                               &qr_fd_ctx->waiting_ops);
+                        }
+                }
+        unlock:
+                UNLOCK (&qr_fd_ctx->lock);
+        } else {
+                can_wind = 1;
+        }
+
+out:
+        if (need_unwind) {
+                STACK_UNWIND (frame, op_ret, op_errno);
+        } else if (can_wind) {
+                STACK_WIND (frame, qr_fentrylk_cbk, FIRST_CHILD(this),
+                            FIRST_CHILD(this)->fops->fentrylk, volume, fd,
+                            basename, cmd, type);
+        } else if (need_open) {
+                op_ret = qr_loc_fill (&loc, fd->inode, path);
+                if (op_ret == -1) {
+                        qr_resume_pending_ops (qr_fd_ctx);
+                        goto out;
+                }
+
+                STACK_WIND (frame, qr_open_cbk, FIRST_CHILD(this),
+                            FIRST_CHILD(this)->fops->open, &loc, flags, fd);
+
+                qr_loc_wipe (&loc);
+        }
+        
+        return 0;
+}
+
+
 int32_t 
 init (xlator_t *this)
 {
@@ -1629,6 +1728,7 @@ struct xlator_fops fops = {
         .fsetxattr   = qr_fsetxattr,
         .fgetxattr   = qr_fgetxattr,
         .flush       = qr_flush,
+        .fentrylk    = qr_fentrylk,
 };