X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=blobdiff_plain;f=drivers%2Fs390%2Fblock%2Fdasd_proc.c;h=f13a0bdd148cae363315ef7d6f1ad895554e0568;hp=6315fbd8e68bf0fe1d8bf557c7932adda91c752f;hb=34b9243a300736c08dc32eaeb2f359401fcf9c0a;hpb=e7d2860b690d4f3bed6824757c540579638e3d1e diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c index 6315fbd..f13a0bd 100644 --- a/drivers/s390/block/dasd_proc.c +++ b/drivers/s390/block/dasd_proc.c @@ -72,7 +72,7 @@ dasd_devices_show(struct seq_file *m, void *v) /* Print device number. */ seq_printf(m, "%s", dev_name(&device->cdev->dev)); /* Print discipline string. */ - if (device != NULL && device->discipline != NULL) + if (device->discipline != NULL) seq_printf(m, "(%s)", device->discipline->name); else seq_printf(m, "(none)"); @@ -92,10 +92,7 @@ dasd_devices_show(struct seq_file *m, void *v) substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " "; seq_printf(m, "%4s: ", substr); /* Print device status information. */ - switch ((device != NULL) ? device->state : -1) { - case -1: - seq_printf(m, "unknown"); - break; + switch (device->state) { case DASD_STATE_NEW: seq_printf(m, "new"); break; @@ -168,51 +165,32 @@ static const struct file_operations dasd_devices_file_ops = { .release = seq_release, }; -static int -dasd_calc_metrics(char *page, char **start, off_t off, - int count, int *eof, int len) -{ - len = (len > off) ? len - off : 0; - if (len > count) - len = count; - if (len < count) - *eof = 1; - *start = page + off; - return len; -} - #ifdef CONFIG_DASD_PROFILE -static char * -dasd_statistics_array(char *str, unsigned int *array, int factor) +static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor) { int i; for (i = 0; i < 32; i++) { - str += sprintf(str, "%7d ", array[i] / factor); + seq_printf(m, "%7d ", array[i] / factor); if (i == 15) - str += sprintf(str, "\n"); + seq_putc(m, '\n'); } - str += sprintf(str,"\n"); - return str; + seq_putc(m, '\n'); } #endif /* CONFIG_DASD_PROFILE */ -static int -dasd_statistics_read(char *page, char **start, off_t off, - int count, int *eof, void *data) +static int dasd_stats_proc_show(struct seq_file *m, void *v) { - unsigned long len; #ifdef CONFIG_DASD_PROFILE struct dasd_profile_info_t *prof; - char *str; int factor; /* check for active profiling */ if (dasd_profile_level == DASD_PROFILE_OFF) { - len = sprintf(page, "Statistics are off - they might be " + seq_printf(m, "Statistics are off - they might be " "switched on using 'echo set on > " "/proc/dasd/statistics'\n"); - return dasd_calc_metrics(page, start, off, count, eof, len); + return 0; } prof = &dasd_global_profile; @@ -220,47 +198,49 @@ dasd_statistics_read(char *page, char **start, off_t off, for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999; factor *= 10); - str = page; - str += sprintf(str, "%d dasd I/O requests\n", prof->dasd_io_reqs); - str += sprintf(str, "with %u sectors(512B each)\n", + seq_printf(m, "%d dasd I/O requests\n", prof->dasd_io_reqs); + seq_printf(m, "with %u sectors(512B each)\n", prof->dasd_io_sects); - str += sprintf(str, "Scale Factor is %d\n", factor); - str += sprintf(str, + seq_printf(m, "Scale Factor is %d\n", factor); + seq_printf(m, " __<4 ___8 __16 __32 __64 _128 " " _256 _512 __1k __2k __4k __8k " " _16k _32k _64k 128k\n"); - str += sprintf(str, + seq_printf(m, " _256 _512 __1M __2M __4M __8M " " _16M _32M _64M 128M 256M 512M " " __1G __2G __4G " " _>4G\n"); - str += sprintf(str, "Histogram of sizes (512B secs)\n"); - str = dasd_statistics_array(str, prof->dasd_io_secs, factor); - str += sprintf(str, "Histogram of I/O times (microseconds)\n"); - str = dasd_statistics_array(str, prof->dasd_io_times, factor); - str += sprintf(str, "Histogram of I/O times per sector\n"); - str = dasd_statistics_array(str, prof->dasd_io_timps, factor); - str += sprintf(str, "Histogram of I/O time till ssch\n"); - str = dasd_statistics_array(str, prof->dasd_io_time1, factor); - str += sprintf(str, "Histogram of I/O time between ssch and irq\n"); - str = dasd_statistics_array(str, prof->dasd_io_time2, factor); - str += sprintf(str, "Histogram of I/O time between ssch " + seq_printf(m, "Histogram of sizes (512B secs)\n"); + dasd_statistics_array(m, prof->dasd_io_secs, factor); + seq_printf(m, "Histogram of I/O times (microseconds)\n"); + dasd_statistics_array(m, prof->dasd_io_times, factor); + seq_printf(m, "Histogram of I/O times per sector\n"); + dasd_statistics_array(m, prof->dasd_io_timps, factor); + seq_printf(m, "Histogram of I/O time till ssch\n"); + dasd_statistics_array(m, prof->dasd_io_time1, factor); + seq_printf(m, "Histogram of I/O time between ssch and irq\n"); + dasd_statistics_array(m, prof->dasd_io_time2, factor); + seq_printf(m, "Histogram of I/O time between ssch " "and irq per sector\n"); - str = dasd_statistics_array(str, prof->dasd_io_time2ps, factor); - str += sprintf(str, "Histogram of I/O time between irq and end\n"); - str = dasd_statistics_array(str, prof->dasd_io_time3, factor); - str += sprintf(str, "# of req in chanq at enqueuing (1..32) \n"); - str = dasd_statistics_array(str, prof->dasd_io_nr_req, factor); - len = str - page; + dasd_statistics_array(m, prof->dasd_io_time2ps, factor); + seq_printf(m, "Histogram of I/O time between irq and end\n"); + dasd_statistics_array(m, prof->dasd_io_time3, factor); + seq_printf(m, "# of req in chanq at enqueuing (1..32) \n"); + dasd_statistics_array(m, prof->dasd_io_nr_req, factor); #else - len = sprintf(page, "Statistics are not activated in this kernel\n"); + seq_printf(m, "Statistics are not activated in this kernel\n"); #endif - return dasd_calc_metrics(page, start, off, count, eof, len); + return 0; } -static int -dasd_statistics_write(struct file *file, const char __user *user_buf, - unsigned long user_len, void *data) +static int dasd_stats_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, dasd_stats_proc_show, NULL); +} + +static ssize_t dasd_stats_proc_write(struct file *file, + const char __user *user_buf, size_t user_len, loff_t *pos) { #ifdef CONFIG_DASD_PROFILE char *buffer, *str; @@ -311,6 +291,15 @@ out_error: #endif /* CONFIG_DASD_PROFILE */ } +static const struct file_operations dasd_stats_proc_fops = { + .owner = THIS_MODULE, + .open = dasd_stats_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = dasd_stats_proc_write, +}; + /* * Create dasd proc-fs entries. * In case creation failed, cleanup and return -ENOENT. @@ -327,13 +316,12 @@ dasd_proc_init(void) &dasd_devices_file_ops); if (!dasd_devices_entry) goto out_nodevices; - dasd_statistics_entry = create_proc_entry("statistics", - S_IFREG | S_IRUGO | S_IWUSR, - dasd_proc_root_entry); + dasd_statistics_entry = proc_create("statistics", + S_IFREG | S_IRUGO | S_IWUSR, + dasd_proc_root_entry, + &dasd_stats_proc_fops); if (!dasd_statistics_entry) goto out_nostatistics; - dasd_statistics_entry->read_proc = dasd_statistics_read; - dasd_statistics_entry->write_proc = dasd_statistics_write; return 0; out_nostatistics: