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| author | Thomas Munro <tmunro@postgresql.org> | 2020-09-07 18:11:46 +1200 |
|---|---|---|
| committer | Thomas Munro <tmunro@postgresql.org> | 2020-09-07 18:28:06 +1200 |
| commit | 861c6e7c8e4dfdd842442dde47cc653764baff4f (patch) | |
| tree | 59e93bee1eb19525460711f762293c894791cc62 /src/include/common/file_utils.h | |
| parent | f0942b1327e8fa32b38a02eaff627c16b517c3f9 (diff) | |
| download | postgresql-861c6e7c8e4dfdd842442dde47cc653764baff4f.tar.gz postgresql-861c6e7c8e4dfdd842442dde47cc653764baff4f.zip | |
Skip unnecessary stat() calls in walkdir().
Some kernels can tell us the type of a "dirent", so we can avoid a call
to stat() or lstat() in many cases. Define a new function
get_dirent_type() to contain that logic, for use by the backend and
frontend versions of walkdir(), and perhaps other callers in future.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Juan José SantamarÃa Flecha <juanjo.santamaria@gmail.com>
Discussion: https://postgr.es/m/CA%2BhUKG%2BFzxupGGN4GpUdbzZN%2Btn6FQPHo8w0Q%2BAPH5Wz8RG%2Bww%40mail.gmail.com
Diffstat (limited to 'src/include/common/file_utils.h')
| -rw-r--r-- | src/include/common/file_utils.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/src/include/common/file_utils.h b/src/include/common/file_utils.h index a7add75efa1..fef846485f8 100644 --- a/src/include/common/file_utils.h +++ b/src/include/common/file_utils.h @@ -1,7 +1,5 @@ /*------------------------------------------------------------------------- * - * File-processing utility routines for frontend code - * * Assorted utility functions to work on files. * * @@ -15,10 +13,28 @@ #ifndef FILE_UTILS_H #define FILE_UTILS_H +#include <dirent.h> + +typedef enum PGFileType +{ + PGFILETYPE_ERROR, + PGFILETYPE_UNKNOWN, + PGFILETYPE_REG, + PGFILETYPE_DIR, + PGFILETYPE_LNK +} PGFileType; + +#ifdef FRONTEND extern int fsync_fname(const char *fname, bool isdir); extern void fsync_pgdata(const char *pg_data, int serverVersion); extern void fsync_dir_recurse(const char *dir); extern int durable_rename(const char *oldfile, const char *newfile); extern int fsync_parent_path(const char *fname); +#endif + +extern PGFileType get_dirent_type(const char *path, + const struct dirent *de, + bool look_through_symlinks, + int elevel); #endif /* FILE_UTILS_H */ |