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authorRaghavendra G <raghavendra@zresearch.com>2009-07-09 00:28:45 +0000
committerAnand V. Avati <avati@dev.gluster.com>2009-07-16 00:37:48 -0700
commit8a184d6f5674b3d5ec50eeaf089ded3c9c14300f (patch)
tree773b842adcdeaca71b9059c114e11213e70a5612 /xlators/performance/quick-read
parent5c95b6568201a6b9e0043ad838892599ab0e0d90 (diff)
quick-read: implement qr_lk.
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
Diffstat (limited to 'xlators/performance/quick-read')
-rw-r--r--xlators/performance/quick-read/src/quick-read.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/xlators/performance/quick-read/src/quick-read.c b/xlators/performance/quick-read/src/quick-read.c
index 632687c0a45..9c120ffcc63 100644
--- a/xlators/performance/quick-read/src/quick-read.c
+++ b/xlators/performance/quick-read/src/quick-read.c
@@ -1979,6 +1979,102 @@ out:
}
+int32_t
+qr_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret,
+ int32_t op_errno, struct flock *lock)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, lock);
+ return 0;
+}
+
+
+int32_t
+qr_lk_helper (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t cmd,
+ struct flock *lock)
+{
+ STACK_WIND (frame, qr_lk_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lk, fd, cmd, lock);
+
+ return 0;
+}
+
+
+int32_t
+qr_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t cmd,
+ struct flock *lock)
+{
+ 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_lk_stub (frame, qr_lk_helper, fd,
+ cmd, lock);
+ 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, NULL);
+ } else if (can_wind) {
+ STACK_WIND (frame, qr_lk_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->lk, fd, cmd, lock);
+ } 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)
{
@@ -2065,6 +2161,7 @@ struct xlator_fops fops = {
.finodelk = qr_finodelk,
.fsync = qr_fsync,
.ftruncate = qr_ftruncate,
+ .lk = qr_lk,
};