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authorRaghavendra G <raghavendra@zresearch.com>2009-07-09 00:28:34 +0000
committerAnand V. Avati <avati@dev.gluster.com>2009-07-16 00:37:47 -0700
commit5c95b6568201a6b9e0043ad838892599ab0e0d90 (patch)
tree0f00c753b26ed469fbc0ac327acb748e3984db6e
parent56428dbbbdd802d2d8cf4377d4f03a59caab7c8b (diff)
quick-read: implement qr_ftruncate.
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
-rw-r--r--xlators/performance/quick-read/src/quick-read.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/xlators/performance/quick-read/src/quick-read.c b/xlators/performance/quick-read/src/quick-read.c
index 0e3095e5f39..632687c0a45 100644
--- a/xlators/performance/quick-read/src/quick-read.c
+++ b/xlators/performance/quick-read/src/quick-read.c
@@ -1838,6 +1838,147 @@ out:
}
+int32_t
+qr_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct stat *buf)
+{
+ int32_t ret = 0;
+ uint64_t value = 0;
+ qr_file_t *qr_file = NULL;
+ qr_local_t *local = NULL;
+
+ if (op_ret == -1) {
+ goto out;
+ }
+
+ local = frame->local;
+ if ((local == NULL) || (local->fd == NULL)
+ || (local->fd->inode == NULL)) {
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+ ret = inode_ctx_get (local->fd->inode, this, &value);
+ if (ret == 0) {
+ qr_file = (qr_file_t *)(long) value;
+
+ if (qr_file) {
+ LOCK (&qr_file->lock);
+ {
+ if (qr_file->stbuf.st_size != buf->st_size) {
+ dict_unref (qr_file->xattr);
+ qr_file->xattr = NULL;
+ }
+ }
+ UNLOCK (&qr_file->lock);
+ }
+ }
+
+out:
+ STACK_UNWIND (frame, op_ret, op_errno, buf);
+ return 0;
+}
+
+
+int32_t
+qr_ftruncate_helper (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ off_t offset)
+{
+ STACK_WIND (frame, qr_ftruncate_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->ftruncate, fd, offset);
+ return 0;
+}
+
+
+int32_t
+qr_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
+{
+ int flags = 0;
+ uint64_t value = 0;
+ call_stub_t *stub = NULL;
+ char *path = NULL;
+ loc_t loc = {0, };
+ qr_local_t *local = NULL;
+ 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;
+ }
+
+ local = CALLOC (1, sizeof (*local));
+ if (local == NULL) {
+ op_ret = -1;
+ op_errno = ENOMEM;
+ need_unwind = 1;
+ goto out;
+ }
+
+ local->fd = fd;
+ frame->local = local;
+
+ 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_ftruncate_stub (frame,
+ qr_ftruncate_helper,
+ fd, offset);
+ 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_ftruncate_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->ftruncate, fd, offset);
+ } 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)
{
@@ -1923,6 +2064,7 @@ struct xlator_fops fops = {
.fentrylk = qr_fentrylk,
.finodelk = qr_finodelk,
.fsync = qr_fsync,
+ .ftruncate = qr_ftruncate,
};