/* Get a struct file and fd for a context and attach the ops */ struct file *cxl_get_fd(struct cxl_context *ctx, struct file_operations *fops, int *fd) { struct file *file; int rc, flags, fdtmp; flags = O_RDWR | O_CLOEXEC; /* This code is similar to anon_inode_getfd() */ rc = get_unused_fd_flags(flags); if (rc < 0) return ERR_PTR(rc); fdtmp = rc; /* * Patch the file ops. Needs to be careful that this is rentrant safe. */ if (fops) { PATCH_FOPS(open); PATCH_FOPS(poll); PATCH_FOPS(read); PATCH_FOPS(release); PATCH_FOPS(unlocked_ioctl); PATCH_FOPS(compat_ioctl); PATCH_FOPS(mmap); } else /* use default ops */ fops = (struct file_operations *)&afu_fops; file = anon_inode_getfile("cxl", fops, ctx, flags); if (IS_ERR(file)) put_unused_fd(fdtmp); *fd = fdtmp; return file; }
/* Get a struct file and fd for a context and attach the ops */ struct file *cxl_get_fd(struct cxl_context *ctx, struct file_operations *fops, int *fd) { struct file *file; int rc, flags, fdtmp; char *name = NULL; /* only allow one per context */ if (ctx->mapping) return ERR_PTR(-EEXIST); flags = O_RDWR | O_CLOEXEC; /* This code is similar to anon_inode_getfd() */ rc = get_unused_fd_flags(flags); if (rc < 0) return ERR_PTR(rc); fdtmp = rc; /* * Patch the file ops. Needs to be careful that this is rentrant safe. */ if (fops) { PATCH_FOPS(open); PATCH_FOPS(poll); PATCH_FOPS(read); PATCH_FOPS(release); PATCH_FOPS(unlocked_ioctl); PATCH_FOPS(compat_ioctl); PATCH_FOPS(mmap); } else /* use default ops */ fops = (struct file_operations *)&afu_fops; name = kasprintf(GFP_KERNEL, "cxl:%d", ctx->pe); file = cxl_getfile(name, fops, ctx, flags); kfree(name); if (IS_ERR(file)) goto err_fd; cxl_context_set_mapping(ctx, file->f_mapping); *fd = fdtmp; return file; err_fd: put_unused_fd(fdtmp); return NULL; }