From 4b918e6f721f34e4014fa3f0b5032037991e321f Mon Sep 17 00:00:00 2001
From: "Luke T. Shumaker" <lukeshu@lukeshu.com>
Date: Wed, 11 Dec 2024 10:22:19 -0700
Subject: Pull out lib9p_util from srv9p
---
cmd/srv9p/static9p.c | 241 ---------------------------------------------------
1 file changed, 241 deletions(-)
delete mode 100644 cmd/srv9p/static9p.c
(limited to 'cmd/srv9p/static9p.c')
diff --git a/cmd/srv9p/static9p.c b/cmd/srv9p/static9p.c
deleted file mode 100644
index b5b18e0..0000000
--- a/cmd/srv9p/static9p.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* srv9p/static9p.c - Serve static files over 9P
- *
- * Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com>
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-
-#include <libmisc/assert.h>
-#include <libmisc/vcall.h>
-
-#include "static9p.h"
-
-#define UNUSED(name)
-#define p9_str(cstr) ((struct lib9p_s){ .len = strlen(cstr), .utf8 = cstr })
-#define p9_nulstr ((struct lib9p_s){ .len = 0, .utf8 = NULL })
-
-/* common *********************************************************************/
-
-static implements_lib9p_srv_file *static_common_clone(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx) {
- _static_common *self = VCALL_SELF(_static_common, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- return self;
-}
-
-static void static_common_free(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx) {
- _static_common *self = VCALL_SELF(_static_common, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- /* do nothing */
-}
-
-static uint32_t static_common_io(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx, lib9p_o_t UNUSED(flags)) {
- _static_common *self = VCALL_SELF(_static_common, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- return 0;
-}
-
-static void static_common_wstat(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx,
- struct lib9p_stat UNUSED(new)) {
- _static_common *self = VCALL_SELF(_static_common, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- lib9p_error(&ctx->basectx, LINUX_EROFS, "read-only part of filesystem");
-}
-
-static void static_common_remove(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx) {
- _static_common *self = VCALL_SELF(_static_common, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- lib9p_error(&ctx->basectx, LINUX_EROFS, "read-only part of filesystem");
-}
-
-/* dir ************************************************************************/
-
-static struct lib9p_stat static_dir_stat(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx) {
- struct static_dir *self = VCALL_SELF(struct static_dir, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- return (struct lib9p_stat){
- .kern_type = 0,
- .kern_dev = 0,
- .file_qid = {
- .type = LIB9P_QT_DIR,
- .vers = 1,
- .path = self->pathnum,
- },
- .file_mode = LIB9P_DM_DIR | (self->perm & 0555),
- .file_atime = self->atime,
- .file_mtime = self->mtime,
- .file_size = 0,
- .file_name = p9_str(self->name),
- .file_owner_uid = p9_str(self->u_name),
- .file_owner_gid = p9_str(self->g_name),
- .file_last_modified_uid = p9_str(self->m_name),
- .file_extension = p9_nulstr,
- .file_owner_n_uid = self->u_num,
- .file_owner_n_gid = self->g_num,
- .file_last_modified_n_uid = self->m_num,
- };
-}
-
-static implements_lib9p_srv_file *static_dir_dopen(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx,
- char *childname) {
- struct static_dir *self = VCALL_SELF(struct static_dir, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- for (size_t i = 0; self->members[i]; i++) {
- implements_lib9p_srv_file *filep = self->members[i];
- struct lib9p_stat stat = VCALL(filep, stat, ctx);
- if (lib9p_ctx_has_error(&ctx->basectx))
- break;
- lib9p_assert_stat(stat);
- if (strcmp(stat.file_name.utf8, childname) == 0)
- return filep;
- }
- lib9p_error(&ctx->basectx,
- LINUX_ENOENT, "no such file or directory");
- return NULL;
-}
-
-static implements_lib9p_srv_file *static_dir_dcreate(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx,
- char *UNUSED(childname),
- lib9p_dm_t UNUSED(perm), lib9p_o_t UNUSED(flags)) {
- struct static_dir *self = VCALL_SELF(struct static_dir, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- lib9p_error(&ctx->basectx, LINUX_EROFS, "read-only part of filesystem");
- return NULL;
-}
-
-static size_t static_dir_dread(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx,
- uint8_t *buf,
- uint32_t byte_count,
- size_t _obj_offset) {
- struct static_dir *self = VCALL_SELF(struct static_dir, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- uint32_t byte_offset = 0;
- size_t obj_offset = _obj_offset;
- while (self->members[obj_offset]) {
- implements_lib9p_srv_file *filep = self->members[obj_offset];
- struct lib9p_stat stat = VCALL(filep, stat, ctx);
- if (lib9p_ctx_has_error(&ctx->basectx))
- break;
- lib9p_assert_stat(stat);
- uint32_t nbytes = lib9p_marshal_stat(&ctx->basectx, byte_count-byte_offset, &stat,
- &buf[byte_offset]);
- if (!nbytes) {
- if (obj_offset == _obj_offset)
- lib9p_error(&ctx->basectx,
- LINUX_ERANGE, "stat object does not fit into negotiated max message size");
- break;
- }
- byte_offset += nbytes;
- obj_offset++;
- }
- return obj_offset - _obj_offset;
-}
-
-struct lib9p_srv_file_vtable static_dir_vtable = {
- .clone = static_common_clone,
- .free = static_common_free,
-
- .io = static_common_io,
- .stat = static_dir_stat,
- .wstat = static_common_wstat,
- .remove = static_common_remove,
-
- .dopen = static_dir_dopen,
- .dcreate = static_dir_dcreate,
-
- .dread = static_dir_dread,
-};
-
-/* file ***********************************************************************/
-
-static inline size_t static_file_size(struct static_file *file) {
- assert(file);
-
-#if __unix__
- assert(file->data_start);
-#endif
- if (!file->data_end)
- return file->data_size;
- return (size_t)((uintptr_t)file->data_end - (uintptr_t)file->data_start);
-}
-
-static struct lib9p_stat static_file_stat(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx) {
- struct static_file *self = VCALL_SELF(struct static_file, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- return (struct lib9p_stat){
- .kern_type = 0,
- .kern_dev = 0,
- .file_qid = {
- .type = LIB9P_QT_FILE,
- .vers = 1,
- .path = self->pathnum,
- },
- .file_mode = self->perm & 0444,
- .file_atime = self->atime,
- .file_mtime = self->mtime,
- .file_size = (uint64_t)static_file_size(self),
- .file_name = p9_str(self->name),
- .file_owner_uid = p9_str(self->u_name),
- .file_owner_gid = p9_str(self->g_name),
- .file_last_modified_uid = p9_str(self->m_name),
- .file_extension = p9_nulstr,
- .file_owner_n_uid = self->u_num,
- .file_owner_n_gid = self->g_num,
- .file_last_modified_n_uid = self->m_num,
- };
-}
-
-static uint32_t static_file_pread(implements_lib9p_srv_file *_self, struct lib9p_srv_ctx *ctx,
- void *buf,
- uint32_t byte_count,
- uint64_t byte_offset) {
- struct static_file *self = VCALL_SELF(struct static_file, implements_lib9p_srv_file, _self);
- assert(self);
- assert(ctx);
-
- size_t data_size = static_file_size(self);
-
- if (byte_offset > (uint64_t)data_size) {
- lib9p_error(&ctx->basectx,
- LINUX_EINVAL, "offset is past end-of-file length");
- return 0;
- }
-
- size_t beg_off = (size_t)byte_offset;
- size_t end_off = beg_off + (size_t)byte_count;
- if (end_off > data_size)
- end_off = data_size;
- memcpy(buf, &self->data_start[beg_off], end_off-beg_off);
- return (uint32_t)(end_off-beg_off);
-}
-
-struct lib9p_srv_file_vtable static_file_vtable = {
- .clone = static_common_clone,
- .free = static_common_free,
-
- .io = static_common_io,
- .stat = static_file_stat,
- .wstat = static_common_wstat,
- .remove = static_common_remove,
-
- .pread = static_file_pread,
- .pwrite = NULL,
-};
--
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