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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2023-10-03 13:08:04 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2023-10-03 15:29:10 -0700 |
| commit | 0baf928aa1ec9adcd6a34bcc8cdd968db70a4c98 (patch) | |
| tree | 32c287534f20787a9965699cac0dcc25475de100 | |
| parent | 220d716f9b3ef579153816990f8498c3eeb2aa19 (diff) | |
| download | f2fs-tools-0baf928aa1ec9adcd6a34bcc8cdd968db70a4c98.tar.gz | |
f2fs_io: add fadvise support
f2fs_io fadvise [advice] [offset] [length] [file]
advice can be "willneed" and "sequential".
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | man/f2fs_io.8 | 3 | ||||
| -rw-r--r-- | tools/f2fs_io/f2fs_io.c | 42 |
2 files changed, 45 insertions, 0 deletions
diff --git a/man/f2fs_io.8 b/man/f2fs_io.8 index 99e31dd..ecaab02 100644 --- a/man/f2fs_io.8 +++ b/man/f2fs_io.8 @@ -47,6 +47,9 @@ going down with fsck mark \fBpinfile\fR \fI[get|set] [file]\fR Get or set the pinning status on a file. .TP +\fBfadvise\fR \fI[advice] [offset] [length] [file]\fR +Pass an advice to the specified file. The advice can be willneed and sequential. +.TP \fBfallocate\fR \fI[-c] [-i] [-p] [-z] [keep_size] [offset] [length] [file]\fR Request that space be allocated on a file. The .I keep_size diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c index 1f6549b..c812aa1 100644 --- a/tools/f2fs_io/f2fs_io.c +++ b/tools/f2fs_io/f2fs_io.c @@ -398,6 +398,47 @@ static void do_shutdown(int argc, char **argv, const struct cmd_desc *cmd) exit(0); } +#define fadvise_desc "fadvise" +#define fadvise_help \ +"f2fs_io fadvise [advice] [offset] [length] [file]\n\n" \ +"fadvice given the file\n" \ +"advice can be\n" \ +" willneed\n" \ +" sequential\n" \ + +static void do_fadvise(int argc, char **argv, const struct cmd_desc *cmd) +{ + int fd, advice; + off_t offset, length; + + if (argc != 5) { + fputs("Excess arguments\n\n", stderr); + fputs(cmd->cmd_help, stderr); + exit(1); + } + + fd = xopen(argv[4], O_RDWR, 0); + + if (!strcmp(argv[1], "willneed")) { + advice = POSIX_FADV_WILLNEED; + } else if (!strcmp(argv[1], "sequential")) { + advice = POSIX_FADV_SEQUENTIAL; + } else { + fputs("Wrong advice\n\n", stderr); + fputs(cmd->cmd_help, stderr); + exit(1); + } + + offset = atoi(argv[2]); + length = atoll(argv[3]); + + if (posix_fadvise(fd, offset, length, advice) != 0) + die_errno("fadvise failed"); + + printf("fadvice %s to a file: %s\n", argv[1], argv[4]); + exit(0); +} + #define pinfile_desc "pin file control" #define pinfile_help \ "f2fs_io pinfile [get|set] [file]\n\n" \ @@ -1499,6 +1540,7 @@ const struct cmd_desc cmd_list[] = { CMD(clearflags), CMD(shutdown), CMD(pinfile), + CMD(fadvise), CMD(fallocate), CMD(erase), CMD(write), |