适配DSS接口与错误码修改

src/include/storage/dss/dss_adaptor.h

@@ -44,9 +44,7 @@ typedef int (*dss_trucate_device)(int handle, long keep_size);
 typedef int (*dss_create_device)(const char *name, int flags);
 typedef int (*dss_remove_device)(const char *name);
 typedef int (*dss_close_device)(int handle);
-typedef int (*dss_exist_device)(const char *name, bool *result);
 typedef int (*dss_create_device_dir)(const char *name);
-typedef int (*dss_exist_device_dir)(const char *name, bool *result);
 typedef dss_dir_handle (*dss_open_device_dir)(const char *name);
 typedef int (*dss_read_device_dir)(dss_dir_handle dir, dss_dirent_t *item, dss_dir_item_t *result);
 typedef int (*dss_close_device_dir)(dss_dir_handle dir);
@@ -56,7 +54,6 @@ typedef int (*dss_check_device_size)(int size);
 typedef int (*dss_align_device_size)(int size);
 typedef int (*dss_link_device)(const char *oldpath, const char *newpath);
 typedef int (*dss_unlink_device)(const char *path);
-typedef int (*dss_exist_device_link)(const char *path, bool *result);
 typedef int (*dss_device_name)(int handle, char *fname, size_t fname_size);
 typedef int (*dss_read_device_link)(const char *path, char *buf, int bufsize);
 typedef int (*dss_stat_device)(const char *path, dss_stat_info_t item);
@@ -85,9 +82,7 @@ typedef struct st_dss_device_op_t {
     dss_seek_device dss_seek;
     dss_trucate_device dss_truncate;
     dss_close_device dss_close;
-    dss_exist_device dss_exist;
     dss_create_device_dir dss_create_dir;
-    dss_exist_device_dir dss_exist_dir;
     dss_rename_device dss_rename;
     dss_check_device_size dss_check_size;
     dss_align_device_size dss_align_size;
@@ -100,7 +95,6 @@ typedef struct st_dss_device_op_t {
     dss_remove_device_dir dss_remove_dir;
     dss_link_device dss_link;
     dss_unlink_device dss_unlink;
-    dss_exist_device_link dss_exist_link;
     dss_read_device_link dss_read_link;
     dss_stat_device dss_stat;
     dss_lstat_device dss_lstat;

src/include/storage/dss/fio_dss.h

@@ -34,10 +34,8 @@
 
 void dss_device_register(dss_device_op_t *dss_device_op, bool enable_dss);
 void dss_set_errno(int *errcode);
-bool dss_exist_file(const char *file_name);
 int dss_access_file(const char *file_name, int mode);
 int dss_create_dir(const char *name, mode_t mode);
-bool dss_exist_dir(const char *name);
 int dss_open_dir(const char *name, DIR **dir_handle);
 int dss_read_dir(DIR *dir_handle, struct dirent **result);
 int dss_close_dir(DIR *dir_handle);
@@ -66,7 +64,6 @@ off_t dss_get_file_size(const char *fname);
 int dss_fallocate_file(int handle, int mode, off_t offset, off_t len);
 int dss_link(const char *src, const char *dst);
 int dss_unlink_target(const char *name);
-bool dss_exist_link(const char *name);
 ssize_t dss_read_link(const char *path, char *buf, size_t buf_size);
 int dss_setvbuf(FILE *stream, char *buf, int mode, size_t size);
 int dss_feof(FILE *stream);

src/include/storage/file/fio_device.h

@@ -166,10 +166,10 @@ static inline int fallocate_dev(int fd, int mode, off_t offset, off_t len)
 static inline int access_dev(const char *pathname, int mode)
 {
     if (is_dss_file(pathname)) {
-        if (!dss_exist_file(pathname) && !dss_exist_dir(pathname)) {
+        if (dss_access_file(pathname, mode) != GS_SUCCESS) {
             return -1;
         }
-        return dss_access_file(pathname, mode);
+        return 0;
     } else {
         return access(pathname, mode);
     }
@@ -215,7 +215,8 @@ static inline int symlink_dev(const char *target, const char *linkpath)
 static inline ssize_t readlink_dev(const char *pathname, char *buf, size_t bufsiz)
 {
     if (is_dss_file(pathname)) {
-        if (!dss_exist_link(pathname)) {
+        struct stat st;
+        if (dss_lstat_file(pathname, &st) != GS_SUCCESS || !S_ISLNK(st.st_mode)) {
             return -1;
         }
 
@@ -249,11 +250,13 @@ static inline int unlink_dev(const char *pathname)
 static inline int lstat_dev(const char * pathname, struct stat * statbuf)
 {
     if (is_dss_file(pathname)) {
-        if (!dss_exist_file(pathname) && !dss_exist_dir(pathname)) {
-            errno = ENOENT;
+        if (dss_lstat_file(pathname, statbuf) != GS_SUCCESS) {
+            if (errno == ERR_DSS_FILE_NOT_EXIST) {
+                errno = ENOENT;
+            }
             return -1;
         }
-        return dss_lstat_file(pathname, statbuf);
+        return GS_SUCCESS;
     } else {
         return lstat(pathname, statbuf);
     }
@@ -262,11 +265,13 @@ static inline int lstat_dev(const char * pathname, struct stat * statbuf)
 static inline int stat_dev(const char *pathname, struct stat *statbuf)
 {
     if (is_dss_file(pathname)) {
-        if (!dss_exist_file(pathname) && !dss_exist_dir(pathname)) {
-            errno = ENOENT;
+        if (dss_stat_file(pathname, statbuf) != GS_SUCCESS) {
+            if (errno == ERR_DSS_FILE_NOT_EXIST) {
+                errno = ENOENT;
+            }
             return -1;
         }
-        return dss_stat_file(pathname, statbuf);
+        return GS_SUCCESS;
     } else {
         return stat(pathname, statbuf);
     }