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Move pg_pwritev_with_retry() to src/common/file_utils.c

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This commit moves pg_pwritev_with_retry(), a convenience wrapper of
pg_writev() able to handle partial writes, to common/file_utils.c so
that the frontend code is able to use it.  A first use-case targetted
for this routine is pg_basebackup and pg_receivewal, for the
zero-padding of a newly-initialized WAL segment.  This is used currently
in the backend when the GUC wal_init_zero is enabled (default).

Author: Bharath Rupireddy
Reviewed-by: Nathan Bossart, Thomas Munro
Discussion: https://postgr.es/m/CALj2ACUq7nAb7=bJNbK3yYmp-SZhJcXFR_pLk8un6XgDzDF3OA@mail.gmail.com
This commit is contained in:
Michael Paquier
2022-10-27 14:39:42 +09:00
parent 1b9cd69c5b
commit 4ab8c81bd9
4 changed files with 74 additions and 71 deletions
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6
src/include/storage/fd.h
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@@ -51,8 +51,6 @@ typedef enum RecoveryInitSyncMethod
RECOVERY_INIT_SYNC_METHOD_SYNCFS
} RecoveryInitSyncMethod;
struct iovec; /* avoid including port/pg_iovec.h here */
typedef int File;
@@ -178,10 +176,6 @@ extern int pg_fsync_no_writethrough(int fd);
extern int pg_fsync_writethrough(int fd);
extern int pg_fdatasync(int fd);
extern void pg_flush_data(int fd, off_t offset, off_t nbytes);
extern ssize_t pg_pwritev_with_retry(int fd,
const struct iovec *iov,
int iovcnt,
off_t offset);
extern int pg_truncate(const char *path, off_t length);
extern void fsync_fname(const char *fname, bool isdir);
extern int fsync_fname_ext(const char *fname, bool isdir, bool ignore_perm, int elevel);