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https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git
synced 2024-11-23 01:33:39 +08:00
f2fs-tools: add f2fstat to print f2fs's status in sec
This tool prints /sys/kernel/debug/f2fs/status in sec so that we can monitor variation of f2fs status. Signed-off-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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@ -2,4 +2,4 @@
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ACLOCAL_AMFLAGS = -I m4
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SUBDIRS = man lib mkfs fsck
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SUBDIRS = man lib mkfs fsck tools
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@ -83,6 +83,7 @@ AC_CONFIG_FILES([
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lib/Makefile
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mkfs/Makefile
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fsck/Makefile
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tools/Makefile
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])
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AC_OUTPUT
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7
tools/Makefile.am
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7
tools/Makefile.am
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@ -0,0 +1,7 @@
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## Makefile.am
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AM_CPPFLAGS = ${libuuid_CFLAGS} -I$(top_srcdir)/include
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AM_CFLAGS = -Wall
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sbin_PROGRAMS = f2fstat
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f2fstat_SOURCES = f2fstat.c
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f2fstat_LDADD = ${libuuid_LIBS} $(top_builddir)/lib/libf2fs.la
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tools/f2fstat.c
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214
tools/f2fstat.c
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#ifdef DEBUG
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#define dbg(fmt, args...) printf(fmt, __VA_ARGS__);
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#else
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#define dbg(fmt, args...)
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#endif
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/*
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* f2fs status
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*/
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#define F2FS_STATUS "/sys/kernel/debug/f2fs/status"
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unsigned long util;
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unsigned long used_node_blks;
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unsigned long used_data_blks;
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//unsigned long inline_inode;
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unsigned long free_segs;
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unsigned long valid_segs;
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unsigned long dirty_segs;
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unsigned long prefree_segs;
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unsigned long gc;
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unsigned long bg_gc;
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unsigned long gc_data_blks;
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unsigned long gc_node_blks;
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//unsigned long extent_hit_ratio;
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unsigned long dirty_node;
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unsigned long dirty_dents;
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unsigned long dirty_meta;
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unsigned long nat_caches;
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unsigned long dirty_sit;
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unsigned long free_nids;
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unsigned long ssr_blks;
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unsigned long lfs_blks;
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struct options {
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int delay;
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int interval;
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};
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struct mm_table {
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const char *name;
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unsigned long *val;
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};
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static int compare_mm_table(const void *a, const void *b)
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{
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dbg("[COMPARE] %s, %s\n", ((struct mm_table *)a)->name, ((struct mm_table *)b)->name);
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return strcmp(((struct mm_table *)a)->name, ((struct mm_table *)b)->name);
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}
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static inline void remove_newline(char **head)
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{
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again:
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if (**head == '\n') {
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*head = *head + 1;
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goto again;
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}
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}
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void f2fstat(void)
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{
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int fd;
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int ret;
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char keyname[32];
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char buf[4096];
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struct mm_table key = { keyname, NULL };
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struct mm_table *found;
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int f2fstat_table_cnt;
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char *head, *tail;
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static struct mm_table f2fstat_table[] = {
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{ " - Data", &used_data_blks },
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{ " - Dirty", &dirty_segs },
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{ " - Free", &free_segs },
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{ " - NATs", &nat_caches },
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{ " - Node", &used_node_blks },
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{ " - Prefree", &prefree_segs },
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{ " - SITs", &dirty_sit },
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{ " - Valid", &valid_segs },
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{ " - dents", &dirty_dents },
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{ " - meta", &dirty_meta },
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{ " - nodes", &dirty_node },
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{ "GC calls", &gc },
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{ "LFS", &lfs_blks },
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{ "SSR", &ssr_blks },
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{ "Utilization", &util },
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};
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f2fstat_table_cnt = sizeof(f2fstat_table)/sizeof(struct mm_table);
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fd = open(F2FS_STATUS, O_RDONLY);
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if (fd < 0) {
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perror("open " F2FS_STATUS);
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exit(EXIT_FAILURE);
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}
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ret = read(fd, buf, 4096);
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if (ret < 0) {
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perror("read " F2FS_STATUS);
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exit(EXIT_FAILURE);
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}
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buf[ret] = '\0';
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head = buf;
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for (;;) {
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remove_newline(&head);
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tail = strchr(head, ':');
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if (!tail)
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break;
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*tail = '\0';
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if (strlen(head) >= sizeof(keyname)) {
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dbg("[OVER] %s\n", head);
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*tail = ':';
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tail = strchr(head, '\n');
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head = tail + 1;
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continue;
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}
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strcpy(keyname, head);
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found = bsearch(&key, f2fstat_table, f2fstat_table_cnt, sizeof(struct mm_table), compare_mm_table);
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dbg("[RESULT] %s (%s)\n", head, (found) ? "O" : "X");
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head = tail + 1;
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if (!found)
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goto nextline;
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*(found->val) = strtoul(head, &tail, 10);
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nextline:
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tail = strchr(head, '\n');
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if (!tail)
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break;
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head = tail + 1;
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}
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close(fd);
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}
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void usage(void)
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{
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printf("Usage: f2fstat [option]\n"
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" -d delay (secs)\n"
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" -i interval of head info\n");
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exit(EXIT_FAILURE);
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}
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void parse_option(int argc, char *argv[], struct options *opt)
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{
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char option;
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const char *option_string = "d:i:h";
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while ((option = getopt(argc, argv, option_string)) != EOF) {
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switch (option) {
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case 'd':
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opt->delay = atoi(optarg);
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break;
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case 'i':
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opt->interval = atoi(optarg);
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break;
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default:
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usage();
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break;
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}
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}
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}
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void print_head(void)
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{
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printf("---utilization--- -----------main area-------- ---balancing async-- -gc- ---alloc---\n");
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printf("util node data free valid dirty prefree node dent meta sit gc ssr lfs\n");
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}
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int main(int argc, char *argv[])
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{
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char format[] = "%3ld %6ld %6ld %6ld %6ld %6ld %6ld %5ld %5ld %3ld %3ld %5ld %6ld %6ld\n";
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int head_interval;
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struct options opt = {
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.delay = 1,
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.interval = 20,
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};
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parse_option(argc, argv, &opt);
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head_interval = opt.interval;
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print_head();
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while (1) {
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if (head_interval-- == 0) {
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print_head();
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head_interval = opt.interval;
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}
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f2fstat();
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printf(format, util, used_node_blks, used_data_blks,
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free_segs, valid_segs, dirty_segs, prefree_segs,
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dirty_node, dirty_dents, dirty_meta, dirty_sit,
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gc, ssr_blks, lfs_blks);
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sleep(opt.delay);
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}
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return 0;
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}
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