From cf771cb5a7b716f3f9e532fd42a1e3a0a75adec5 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 3 Sep 2008 09:01:09 +0200 Subject: [PATCH] block: make variable and argument names more consistent In hd_struct, @partno is used to denote partition number and a number of other places use @part to denote hd_struct. Functions use @part and @index instead. This causes confusion and makes it difficult to use consistent variable names for hd_struct. Always use @partno if a variable represents partition number. Also, print out functions use @f or @part for seq_file argument. Use @seqf uniformly instead. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe --- block/genhd.c | 54 ++++++++++++++++++++----------------------- block/ioctl.c | 15 ++++++------ fs/block_dev.c | 8 +++---- fs/partitions/check.c | 33 +++++++++++++------------- include/linux/genhd.h | 12 +++++----- 5 files changed, 60 insertions(+), 62 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index 11038fbc75e..dc9ad4c171e 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -43,14 +43,14 @@ static inline int major_to_index(int major) } #ifdef CONFIG_PROC_FS -void blkdev_show(struct seq_file *f, off_t offset) +void blkdev_show(struct seq_file *seqf, off_t offset) { struct blk_major_name *dp; if (offset < BLKDEV_MAJOR_HASH_SIZE) { mutex_lock(&block_class_lock); for (dp = major_names[offset]; dp; dp = dp->next) - seq_printf(f, "%3d %s\n", dp->major, dp->name); + seq_printf(seqf, "%3d %s\n", dp->major, dp->name); mutex_unlock(&block_class_lock); } } @@ -157,7 +157,7 @@ void blk_unregister_region(dev_t devt, unsigned long range) EXPORT_SYMBOL(blk_unregister_region); -static struct kobject *exact_match(dev_t devt, int *part, void *data) +static struct kobject *exact_match(dev_t devt, int *partno, void *data) { struct gendisk *p = data; @@ -217,9 +217,9 @@ void unlink_gendisk(struct gendisk *disk) * This function gets the structure containing partitioning * information for the given device @devt. */ -struct gendisk *get_gendisk(dev_t devt, int *part) +struct gendisk *get_gendisk(dev_t devt, int *partno) { - struct kobject *kobj = kobj_lookup(bdev_map, devt, part); + struct kobject *kobj = kobj_lookup(bdev_map, devt, partno); struct device *dev = kobj_to_dev(kobj); return kobj ? dev_to_disk(dev) : NULL; @@ -336,23 +336,12 @@ static void *show_partition_start(struct seq_file *seqf, loff_t *pos) return p; } -static int show_partition(struct seq_file *part, void *v) +static int show_partition(struct seq_file *seqf, void *v) { struct gendisk *sgp = v; int n; char buf[BDEVNAME_SIZE]; - /* - * Print header if start told us to do. This is to preserve - * the original behavior of not printing header if no - * partition exists. This hackery will be removed later with - * class iteration clean up. - */ - if (part->private) { - seq_puts(part, "major minor #blocks name\n\n"); - part->private = NULL; - } - /* Don't show non-partitionable removeable devices or empty devices */ if (!get_capacity(sgp) || (sgp->minors == 1 && (sgp->flags & GENHD_FL_REMOVABLE))) @@ -361,7 +350,7 @@ static int show_partition(struct seq_file *part, void *v) return 0; /* show the full disk and all non-0 size partitions of it */ - seq_printf(part, "%4d %4d %10llu %s\n", + seq_printf(seqf, "%4d %4d %10llu %s\n", sgp->major, sgp->first_minor, (unsigned long long)get_capacity(sgp) >> 1, disk_name(sgp, 0, buf)); @@ -370,7 +359,7 @@ static int show_partition(struct seq_file *part, void *v) continue; if (sgp->part[n]->nr_sects == 0) continue; - seq_printf(part, "%4d %4d %10llu %s\n", + seq_printf(seqf, "%4d %4d %10llu %s\n", sgp->major, n + 1 + sgp->first_minor, (unsigned long long)sgp->part[n]->nr_sects >> 1 , disk_name(sgp, n + 1, buf)); @@ -388,7 +377,7 @@ const struct seq_operations partitions_op = { #endif -static struct kobject *base_probe(dev_t devt, int *part, void *data) +static struct kobject *base_probe(dev_t devt, int *partno, void *data) { if (request_module("block-major-%d-%d", MAJOR(devt), MINOR(devt)) > 0) /* Make old-style 2.4 aliases work */ @@ -564,7 +553,14 @@ static struct device_type disk_type = { }; #ifdef CONFIG_PROC_FS -static int diskstats_show(struct seq_file *s, void *v) +/* + * aggregate disk stat collector. Uses the same stats that the sysfs + * entries do, above, but makes them available through one seq_file. + * + * The output looks suspiciously like /proc/partitions with a bunch of + * extra fields. + */ +static int diskstats_show(struct seq_file *seqf, void *v) { struct gendisk *gp = v; char buf[BDEVNAME_SIZE]; @@ -572,7 +568,7 @@ static int diskstats_show(struct seq_file *s, void *v) /* if (&gp->dev.kobj.entry == block_class.devices.next) - seq_puts(s, "major minor name" + seq_puts(seqf, "major minor name" " rio rmerge rsect ruse wio wmerge " "wsect wuse running use aveq" "\n\n"); @@ -581,7 +577,7 @@ static int diskstats_show(struct seq_file *s, void *v) preempt_disable(); disk_round_stats(gp); preempt_enable(); - seq_printf(s, "%4d %4d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n", + seq_printf(seqf, "%4d %4d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n", gp->major, gp->first_minor, disk_name(gp, 0, buf), disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]), (unsigned long long)disk_stat_read(gp, sectors[0]), @@ -603,7 +599,7 @@ static int diskstats_show(struct seq_file *s, void *v) preempt_disable(); part_round_stats(hd); preempt_enable(); - seq_printf(s, "%4d %4d %s %lu %lu %llu " + seq_printf(seqf, "%4d %4d %s %lu %lu %llu " "%u %lu %lu %llu %u %u %u %u\n", gp->major, n + gp->first_minor + 1, disk_name(gp, n + 1, buf), @@ -655,7 +651,7 @@ void genhd_media_change_notify(struct gendisk *disk) EXPORT_SYMBOL_GPL(genhd_media_change_notify); #endif /* 0 */ -dev_t blk_lookup_devt(const char *name, int part) +dev_t blk_lookup_devt(const char *name, int partno) { dev_t devt = MKDEV(0, 0); struct class_dev_iter iter; @@ -665,9 +661,9 @@ dev_t blk_lookup_devt(const char *name, int part) while ((dev = class_dev_iter_next(&iter))) { struct gendisk *disk = dev_to_disk(dev); - if (!strcmp(dev->bus_id, name) && part < disk->minors) { + if (!strcmp(dev->bus_id, name) && partno < disk->minors) { devt = MKDEV(MAJOR(dev->devt), - MINOR(dev->devt) + part); + MINOR(dev->devt) + partno); break; } } @@ -777,10 +773,10 @@ int bdev_read_only(struct block_device *bdev) EXPORT_SYMBOL(bdev_read_only); -int invalidate_partition(struct gendisk *disk, int index) +int invalidate_partition(struct gendisk *disk, int partno) { int res = 0; - struct block_device *bdev = bdget_disk(disk, index); + struct block_device *bdev = bdget_disk(disk, partno); if (bdev) { fsync_bdev(bdev); res = __invalidate_device(bdev); diff --git a/block/ioctl.c b/block/ioctl.c index eb046aeede8..d77f5e280a6 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -15,7 +15,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user struct blkpg_ioctl_arg a; struct blkpg_partition p; long long start, length; - int part; + int partno; int i; int err; @@ -28,8 +28,8 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user disk = bdev->bd_disk; if (bdev != bdev->bd_contains) return -EINVAL; - part = p.pno; - if (part <= 0 || part >= disk->minors) + partno = p.pno; + if (partno <= 0 || partno >= disk->minors) return -EINVAL; switch (a.op) { case BLKPG_ADD_PARTITION: @@ -59,13 +59,14 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user } } /* all seems OK */ - err = add_partition(disk, part, start, length, ADDPART_FLAG_NONE); + err = add_partition(disk, partno, start, length, + ADDPART_FLAG_NONE); mutex_unlock(&bdev->bd_mutex); return err; case BLKPG_DEL_PARTITION: - if (!disk->part[part-1]) + if (!disk->part[partno - 1]) return -ENXIO; - bdevp = bdget_disk(disk, part); + bdevp = bdget_disk(disk, partno); if (!bdevp) return -ENOMEM; mutex_lock(&bdevp->bd_mutex); @@ -79,7 +80,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user invalidate_bdev(bdevp); mutex_lock_nested(&bdev->bd_mutex, 1); - delete_partition(disk, part); + delete_partition(disk, partno); mutex_unlock(&bdev->bd_mutex); mutex_unlock(&bdevp->bd_mutex); bdput(bdevp); diff --git a/fs/block_dev.c b/fs/block_dev.c index aff54219e04..de0776cd721 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -930,7 +930,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part) struct module *owner = NULL; struct gendisk *disk; int ret; - int part; + int partno; int perm = 0; if (file->f_mode & FMODE_READ) @@ -949,7 +949,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part) ret = -ENXIO; file->f_mapping = bdev->bd_inode->i_mapping; lock_kernel(); - disk = get_gendisk(bdev->bd_dev, &part); + disk = get_gendisk(bdev->bd_dev, &partno); if (!disk) { unlock_kernel(); bdput(bdev); @@ -961,7 +961,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part) if (!bdev->bd_openers) { bdev->bd_disk = disk; bdev->bd_contains = bdev; - if (!part) { + if (!partno) { struct backing_dev_info *bdi; if (disk->fops->open) { ret = disk->fops->open(bdev->bd_inode, file); @@ -989,7 +989,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part) if (ret) goto out_first; bdev->bd_contains = whole; - p = disk->part[part - 1]; + p = disk->part[partno - 1]; bdev->bd_inode->i_data.backing_dev_info = whole->bd_inode->i_data.backing_dev_info; if (!(disk->flags & GENHD_FL_UP) || !p || !p->nr_sects) { diff --git a/fs/partitions/check.c b/fs/partitions/check.c index 16f98d82460..b86aab1b0df 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -120,22 +120,22 @@ static int (*check_part[])(struct parsed_partitions *, struct block_device *) = * a pointer to that same buffer (for convenience). */ -char *disk_name(struct gendisk *hd, int part, char *buf) +char *disk_name(struct gendisk *hd, int partno, char *buf) { - if (!part) + if (!partno) snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name); else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1])) - snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, part); + snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno); else - snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, part); + snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno); return buf; } const char *bdevname(struct block_device *bdev, char *buf) { - int part = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor; - return disk_name(bdev->bd_disk, part, buf); + int partno = MINOR(bdev->bd_dev) - bdev->bd_disk->first_minor; + return disk_name(bdev->bd_disk, partno, buf); } EXPORT_SYMBOL(bdevname); @@ -310,13 +310,13 @@ static inline void disk_sysfs_add_subdirs(struct gendisk *disk) kobject_put(k); } -void delete_partition(struct gendisk *disk, int part) +void delete_partition(struct gendisk *disk, int partno) { - struct hd_struct *p = disk->part[part-1]; + struct hd_struct *p = disk->part[partno - 1]; if (!p) return; - disk->part[part-1] = NULL; + disk->part[partno - 1] = NULL; p->start_sect = 0; p->nr_sects = 0; part_stat_set_all(p, 0); @@ -333,12 +333,13 @@ static ssize_t whole_disk_show(struct device *dev, static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH, whole_disk_show, NULL); -int add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags) +int add_partition(struct gendisk *disk, int partno, + sector_t start, sector_t len, int flags) { struct hd_struct *p; int err; - if (disk->part[part - 1]) + if (disk->part[partno - 1]) return -EBUSY; p = kzalloc(sizeof(*p), GFP_KERNEL); @@ -351,18 +352,18 @@ int add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, } p->start_sect = start; p->nr_sects = len; - p->partno = part; + p->partno = partno; p->policy = disk->policy; if (isdigit(disk->dev.bus_id[strlen(disk->dev.bus_id)-1])) snprintf(p->dev.bus_id, BUS_ID_SIZE, - "%sp%d", disk->dev.bus_id, part); + "%sp%d", disk->dev.bus_id, partno); else snprintf(p->dev.bus_id, BUS_ID_SIZE, - "%s%d", disk->dev.bus_id, part); + "%s%d", disk->dev.bus_id, partno); device_initialize(&p->dev); - p->dev.devt = MKDEV(disk->major, disk->first_minor + part); + p->dev.devt = MKDEV(disk->major, disk->first_minor + partno); p->dev.class = &block_class; p->dev.type = &part_type; p->dev.parent = &disk->dev; @@ -386,7 +387,7 @@ int add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, } /* everything is up and running, commence */ - disk->part[part - 1] = p; + disk->part[partno - 1] = p; /* suppress uevent if the disk supresses it */ if (!disk->dev.uevent_suppress) diff --git a/include/linux/genhd.h b/include/linux/genhd.h index c64e659c984..d1723c0a860 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -365,7 +365,7 @@ extern int get_blkdev_list(char *, int); extern void add_disk(struct gendisk *disk); extern void del_gendisk(struct gendisk *gp); extern void unlink_gendisk(struct gendisk *gp); -extern struct gendisk *get_gendisk(dev_t dev, int *part); +extern struct gendisk *get_gendisk(dev_t dev, int *partno); extern void set_device_ro(struct block_device *bdev, int flag); extern void set_disk_ro(struct gendisk *disk, int flag); @@ -534,8 +534,8 @@ struct unixware_disklabel { #define ADDPART_FLAG_RAID 1 #define ADDPART_FLAG_WHOLEDISK 2 -extern dev_t blk_lookup_devt(const char *name, int part); -extern char *disk_name (struct gendisk *hd, int part, char *buf); +extern dev_t blk_lookup_devt(const char *name, int partno); +extern char *disk_name (struct gendisk *hd, int partno, char *buf); extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev); extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int); @@ -553,16 +553,16 @@ extern void blk_register_region(dev_t devt, unsigned long range, void *data); extern void blk_unregister_region(dev_t devt, unsigned long range); -static inline struct block_device *bdget_disk(struct gendisk *disk, int index) +static inline struct block_device *bdget_disk(struct gendisk *disk, int partno) { - return bdget(MKDEV(disk->major, disk->first_minor) + index); + return bdget(MKDEV(disk->major, disk->first_minor) + partno); } #else /* CONFIG_BLOCK */ static inline void printk_all_partitions(void) { } -static inline dev_t blk_lookup_devt(const char *name, int part) +static inline dev_t blk_lookup_devt(const char *name, int partno) { dev_t devt = MKDEV(0, 0); return devt; -- 2.41.0