summaryrefslogtreecommitdiffstats
path: root/xlators/performance/quick-read
diff options
context:
space:
mode:
authorRaghavendra G <raghavendra@zresearch.com>2009-07-09 00:26:35 +0000
committerAnand V. Avati <avati@dev.gluster.com>2009-07-16 00:37:45 -0700
commit01ccfc375925a1643afbd5ce2eb8078a617db881 (patch)
tree834e66825ef3366e9a0453271c624135d57ca0cf /xlators/performance/quick-read
parent493e712940fd4c1ce621db0c970597b11446da3e (diff)
quick-read: implement qr_writev
- writev on any fd opened on a file invalidates the cache stored during lookup 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.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/xlators/performance/quick-read/src/quick-read.c b/xlators/performance/quick-read/src/quick-read.c
index 89cc8bf8d..a92c34736 100644
--- a/xlators/performance/quick-read/src/quick-read.c
+++ b/xlators/performance/quick-read/src/quick-read.c
@@ -880,6 +880,123 @@ out:
}
+int32_t
+qr_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret,
+ int32_t op_errno, struct stat *stbuf)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, stbuf);
+ return 0;
+}
+
+
+int32_t
+qr_writev_helper (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ struct iovec *vector, int32_t count, off_t off,
+ struct iobref *iobref)
+{
+ STACK_WIND (frame, qr_writev_cbk, FIRST_CHILD (this),
+ FIRST_CHILD (this)->fops->writev, fd, vector, count, off,
+ iobref);
+ return 0;
+}
+
+
+int32_t
+qr_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector,
+ int32_t count, off_t off, struct iobref *iobref)
+{
+ uint64_t value = 0;
+ int flags = 0;
+ call_stub_t *stub = NULL;
+ char *path = NULL;
+ loc_t loc = {0, };
+ qr_file_t *qr_file = NULL;
+ qr_fd_ctx_t *qr_fd_ctx = NULL;
+ int32_t op_ret = -1, op_errno = -1, ret = -1;
+ char can_wind = 0, need_unwind = 0, need_open = 0;
+
+ ret = fd_ctx_get (fd, this, &value);
+
+ if (ret == 0) {
+ qr_fd_ctx = (qr_fd_ctx_t *)(long) value;
+ }
+
+ ret = inode_ctx_get (fd->inode, this, &value);
+ if (ret == 0) {
+ qr_file = (qr_file_t *)(long)value;
+ }
+
+ if (qr_file) {
+ LOCK (&qr_file->lock);
+ {
+ if (qr_file->xattr) {
+ dict_unref (qr_file->xattr);
+ qr_file->xattr = NULL;
+ }
+ }
+ UNLOCK (&qr_file->lock);
+ }
+
+ 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_writev_stub (frame, qr_writev_helper,
+ fd, vector, count, off,
+ iobref);
+ 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_writev_cbk, FIRST_CHILD (this),
+ FIRST_CHILD (this)->fops->writev, fd, vector, count,
+ off, iobref);
+ } 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)
{
@@ -955,6 +1072,7 @@ struct xlator_fops fops = {
.lookup = qr_lookup,
.open = qr_open,
.readv = qr_readv,
+ .writev = qr_writev,
};