libglusterfsclient: Add ftruncate API

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

1 files changed, 77 insertions, 0 deletions

diff --git a/libglusterfsclient/src/libglusterfsclient.c b/libglusterfsclient/src/libglusterfsclient.c
index de26203e618..9a97b6d619d 100755
--- a/libglusterfsclient/src/libglusterfsclient.c
+++ b/libglusterfsclient/src/libglusterfsclient.c
@@ -3778,6 +3778,83 @@ out:
         return op_ret;
 }
 
+int
+libgf_client_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *xlator
+                                ,int32_t op_ret, int32_t op_errno,
+                                struct stat *buf)
+{
+        libgf_client_local_t    *local = frame->local;
+
+        local->reply_stub = fop_ftruncate_cbk_stub (frame, NULL, op_ret,
+                                                        op_errno, buf);
+
+        LIBGF_REPLY_NOTIFY (local);
+
+        return 0;
+}
+
+int
+libgf_client_ftruncate (libglusterfs_client_ctx_t *ctx, fd_t *fd,
+                                off_t length)
+{
+        libgf_client_local_t            *local = NULL;
+        call_stub_t                     *stub = NULL;
+        int                             op_ret = -1;
+        libglusterfs_client_fd_ctx_t    *fdctx = NULL;
+
+        if (!(fd->flags & O_RDWR) && (!(fd->flags & O_WRONLY))) {
+                errno = EBADF;
+                goto out;
+        }
+
+        LIBGF_CLIENT_FOP (ctx, stub, ftruncate, local, fd, length);
+
+        op_ret = stub->args.ftruncate_cbk.op_ret;
+        errno = stub->args.ftruncate_cbk.op_errno;
+
+        if (op_ret == -1)
+                goto out;
+        libgf_update_iattr_cache (fd->inode, LIBGF_UPDATE_STAT,
+                                        &stub->args.ftruncate_cbk.buf);
+
+        fdctx = libgf_get_fd_ctx (fd);
+        if (!fd) {
+                errno = EINVAL;
+                op_ret = -1;
+                goto out;
+        }
+
+        pthread_mutex_lock (&fdctx->lock);
+        {
+                fdctx->offset = stub->args.ftruncate_cbk.buf.st_size;
+        }
+        pthread_mutex_lock (&fdctx->lock);
+
+out:
+        call_stub_destroy (stub);
+        return op_ret;
+}
+
+int
+glusterfs_ftruncate (glusterfs_file_t fd, off_t length)
+{
+        libglusterfs_client_fd_ctx_t    *fdctx = NULL;
+        int                             op_ret = -1;
+
+        GF_VALIDATE_OR_GOTO (LIBGF_XL_NAME, fd, out);
+
+        fdctx = libgf_get_fd_ctx (fd);
+        if (!fdctx) {
+                errno = EBADF;
+                goto out;
+        }
+
+        op_ret = libgf_client_ftruncate (fdctx->ctx, fd, length);
+
+out:
+        return op_ret;
+}
+
 static struct xlator_fops libgf_client_fops = {
 };