Currently, e4defrag calls EXT4_IOC_MOVE_EXT ioctl if the fragmentation score
of a donor file is zero. However, it is difficult sometimes to create the file
that has the average of 4096 blocks per extent. We can use e4defrag -F to defrag
in this case.
Signed-off-by: Kazuya Mio <k-mio@xxxxxxxxxxxxx>
---
misc/e4defrag.8.in | 5 ++++-
misc/e4defrag.c | 14 ++++++++++----
2 files changed, 14 insertions(+), 5 deletions(-)
diff --git a/misc/e4defrag.8.in b/misc/e4defrag.8.in
index 81adc29..ede7455 100644
--- a/misc/e4defrag.8.in
+++ b/misc/e4defrag.8.in
@@ -4,7 +4,7 @@ e4defrag \- online defragmenter for ext4 filesystem
.SH SYNOPSIS
.B e4defrag
[
-.B \-v
+.B \-Fv
]
.I target
\&...
@@ -31,6 +31,9 @@ gets the mount point of it and reduces fragmentation of all files in this mount
point.
.SH OPTIONS
.TP
+.B \-F
+Force defrag if the fragmentation gets better.
+.TP
.B \-v
Print error messages and the fragmentation count before and after defrag for
each file.
diff --git a/misc/e4defrag.c b/misc/e4defrag.c
index 44d54f3..64b1474 100644
--- a/misc/e4defrag.c
+++ b/misc/e4defrag.c
@@ -80,6 +80,7 @@
/* The mode of defrag */
#define DETAIL 0x01
+#define FORCE 0x02
#define DEVNAME 0
#define DIRNAME 1
@@ -107,7 +108,7 @@
/* The following macros are error message */
#define MSG_USAGE \
-"Usage : e4defrag [-v] file...| directory...| device...\n"
+"Usage : e4defrag [-Fv] file...| directory...| device...\n"
#define NGMSG_EXT4 "Filesystem is not ext4 filesystem"
#define NGMSG_FILE_EXTENT "Failed to get file extents"
@@ -1153,7 +1154,8 @@ check_improvement:
extents_before_defrag += file_frags_start;
}
- if (!orig_score || donor_score) {
+ if (!orig_score || (donor_score && !(mode_flag & FORCE)) ||
+ (orig_score <= donor_score && (mode_flag & FORCE))) {
printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
defraged_file_count, total_count, file, 100);
if (mode_flag & DETAIL)
@@ -1231,8 +1233,12 @@ int main(int argc, char *argv[])
if (argc == 1)
goto out;
- while ((opt = getopt(argc, argv, "v")) != EOF) {
+ while ((opt = getopt(argc, argv, "Fv")) != EOF) {
switch (opt) {
+ case 'F':
+ /* Force defrag if the fragmentation gets better */
+ mode_flag |= FORCE;
+ break;
case 'v':
mode_flag |= DETAIL;
break;
@@ -1245,7 +1251,7 @@ int main(int argc, char *argv[])
goto out;
current_uid = getuid();
- threshold = DEFAULT_THRESHOLD;
+ threshold = (mode_flag & FORCE) ? ~0U : DEFAULT_THRESHOLD;
/* Main process */
for (i = optind; i < argc; i++) {
--
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