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Re: [PATCH] implemented DAV copy hardlinks
On Tue, 16 Oct 2012 19:44:55 +0400
Maxim Dounin <mdounin@xxxxxxxxxx> wrote:
> 1) Я бы всё-таки сделал wrapper, как в предыдущем патче, с тем
> чтобы можно было дописать потом и для виндов с минимальными
> трудозатратами.
> 2) Ошибки всё-таки стоит проверять, и наверное копировать только в
> случае NGX_EXDEV.
> ngx_change_file_access()
done
> Note: под win32 это сломается, т.к. там для ngx_set_file_time()
> требуется файловый дескриптор.
Да. Добавим открытие файла, когда будем делать под винду.
Там еще надо смотреть, с какими флагами его открывать.
> Может, чтобы два раза не вставать, имеет смысл протащить тут сразу
> указатель на конфигурацию? Или даже вообще на объект запроса?
done
---
src/core/ngx_file.c | 29 +++++++++++++++++++++++++++++
src/core/ngx_file.h | 2 ++
src/http/modules/ngx_http_dav_module.c | 32 ++++++++++++++++++++++++++------
src/os/unix/ngx_files.h | 4 ++++
4 files changed, 61 insertions(+), 6 deletions(-)
diff --git a/src/core/ngx_file.c b/src/core/ngx_file.c
index d9b30f8..d66320c 100644
--- a/src/core/ngx_file.c
+++ b/src/core/ngx_file.c
@@ -608,6 +608,7 @@ ngx_ext_rename_file(ngx_str_t *src, ngx_str_t *to,
ngx_ext_rename_file_t *ext)
cf.access = ext->access;
cf.time = ext->time;
cf.log = ext->log;
+ cf.hardlink = 0;
name = ngx_alloc(to->len + 1 + 10 + 1, ext->log);
if (name == NULL) {
@@ -681,6 +682,32 @@ ngx_copy_file(u_char *from, u_char *to, ngx_copy_file_t
*cf)
rc = NGX_ERROR;
buf = NULL;
nfd = NGX_INVALID_FILE;
+ fd = NGX_INVALID_FILE;
+
+#if !(NGX_WIN32)
+
+ if (cf->hardlink) {
+ rc = ngx_hardlink_file(from, to);
+
+ if (rc == NGX_FILE_ERROR && ngx_errno != NGX_EXDEV) {
+ ngx_log_error(NGX_LOG_CRIT, cf->log, ngx_errno,
+ ngx_hardlink_file_n " \"%s\" to \"%s\" failed",
+ from, to);
+ goto failed;
+ }
+
+ if (rc == NGX_OK) {
+ if (ngx_change_file_access(to, cf->access) == NGX_FILE_ERROR) {
+ ngx_log_error(NGX_LOG_EMERG, cf->log, ngx_errno,
+ ngx_change_file_access_n " \"%s\" failed", to);
+ goto failed;
+ }
+
+ goto done;
+ }
+ }
+
+#endif
fd = ngx_open_file(from, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
@@ -763,6 +790,8 @@ ngx_copy_file(u_char *from, u_char *to, ngx_copy_file_t *cf)
size -= n;
}
+done:
+
if (cf->time != -1) {
if (ngx_set_file_time(to, nfd, cf->time) != NGX_OK) {
ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno,
diff --git a/src/core/ngx_file.h b/src/core/ngx_file.h
index 7023e67..81c706a 100644
--- a/src/core/ngx_file.h
+++ b/src/core/ngx_file.h
@@ -94,6 +94,8 @@ typedef struct {
ngx_uint_t access;
time_t time;
+ unsigned hardlink:1;
+
ngx_log_t *log;
} ngx_copy_file_t;
diff --git a/src/http/modules/ngx_http_dav_module.c
b/src/http/modules/ngx_http_dav_module.c
index dbb17ac..53560a6 100644
--- a/src/http/modules/ngx_http_dav_module.c
+++ b/src/http/modules/ngx_http_dav_module.c
@@ -21,16 +21,18 @@
typedef struct {
- ngx_uint_t methods;
- ngx_uint_t access;
- ngx_uint_t min_delete_depth;
- ngx_flag_t create_full_put_path;
+ ngx_uint_t methods;
+ ngx_uint_t access;
+ ngx_uint_t min_delete_depth;
+ ngx_flag_t create_full_put_path;
+ ngx_flag_t hardlink;
} ngx_http_dav_loc_conf_t;
typedef struct {
- ngx_str_t path;
- size_t len;
+ ngx_str_t path;
+ size_t len;
+ ngx_http_request_t *request;
} ngx_http_dav_copy_ctx_t;
@@ -106,6 +108,13 @@ static ngx_command_t ngx_http_dav_commands[] = {
offsetof(ngx_http_dav_loc_conf_t, access),
NULL },
+ { ngx_string("dav_copy_hardlink"),
+ NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
+ ngx_conf_set_flag_slot,
+ NGX_HTTP_LOC_CONF_OFFSET,
+ offsetof(ngx_http_dav_loc_conf_t, hardlink),
+ NULL },
+
ngx_null_command
};
@@ -767,7 +776,10 @@ overwrite_done:
ngx_create_dir_n, copy.path.data);
}
+ dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);
+
copy.len = path.len;
+ copy.request = r;
tree.init_handler = NULL;
tree.file_handler = ngx_http_dav_copy_tree_file;
@@ -818,6 +830,7 @@ overwrite_done:
cf.access = dlcf->access;
cf.time = ngx_file_mtime(&fi);
cf.log = r->connection->log;
+ cf.hardlink = dlcf->hardlink;
if (ngx_copy_file(path.data, copy.path.data, &cf) == NGX_OK) {
return NGX_HTTP_NO_CONTENT;
@@ -935,6 +948,7 @@ ngx_http_dav_copy_tree_file(ngx_tree_ctx_t *ctx, ngx_str_t
*path)
size_t len;
ngx_copy_file_t cf;
ngx_http_dav_copy_ctx_t *copy;
+ ngx_http_dav_loc_conf_t *dlcf;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
"http copy file: \"%s\"", path->data);
@@ -954,11 +968,14 @@ ngx_http_dav_copy_tree_file(ngx_tree_ctx_t *ctx,
ngx_str_t *path)
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
"http copy file to: \"%s\"", file);
+ dlcf = ngx_http_get_module_loc_conf(copy->request, ngx_http_dav_module);
+
cf.size = ctx->size;
cf.buf_size = 0;
cf.access = ctx->access;
cf.time = ctx->mtime;
cf.log = ctx->log;
+ cf.hardlink = dlcf->hardlink;
(void) ngx_copy_file(path->data, file, &cf);
@@ -1096,6 +1113,7 @@ ngx_http_dav_create_loc_conf(ngx_conf_t *cf)
conf->min_delete_depth = NGX_CONF_UNSET_UINT;
conf->access = NGX_CONF_UNSET_UINT;
conf->create_full_put_path = NGX_CONF_UNSET;
+ conf->hardlink = NGX_CONF_UNSET;
return conf;
}
@@ -1118,6 +1136,8 @@ ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent,
void *child)
ngx_conf_merge_value(conf->create_full_put_path,
prev->create_full_put_path, 0);
+ ngx_conf_merge_value(conf->hardlink, prev->hardlink, 0);
+
return NGX_CONF_OK;
}
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index 9c97e2b..826960b 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -157,6 +157,10 @@ ngx_write_fd(ngx_fd_t fd, void *buf, size_t n)
#define ngx_rename_file_n "rename()"
+#define ngx_hardlink_file(o, n) link((const char *) o, (const char *) n)
+#define ngx_hardlink_file_n "link()"
+
+
#define ngx_change_file_access(n, a) chmod((const char *) n, a)
#define ngx_change_file_access_n "chmod()"
--
1.7.1
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