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btrfs-progs: use clearer var names in is_ssd()

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is_ssd() uses nondescript variable names; path - to what?
disk - it's a dev_t not a disk name, unlike dev, which is
a name not a dev_t!

Rename some vars to make things hopefully clearer:

 wholedisk - the name of the node for the entire disk
 devno - the dev_t of the device we're mkfs'ing
 sysfs_path - the path in sysfs we ultimately check

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
This commit is contained in:
Eric Sandeen 2013-04-11 10:44:18 -05:00 committed by David Sterba
parent c9ef717ba3
commit 1997b9dc79
1 changed files with 9 additions and 8 deletions
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17
mkfs.c
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@ -1216,9 +1216,9 @@ static int check_leaf_or_node_size(u32 size, u32 sectorsize)
static int is_ssd(const char *file)
{
blkid_probe probe;
char dev[32];
char path[PATH_MAX];
dev_t disk;
char wholedisk[32];
char sysfs_path[PATH_MAX];
dev_t devno;
int fd;
char rotational;
@ -1227,18 +1227,19 @@ static int is_ssd(const char *file)
return 0;
/* Device number of this disk (possibly a partition) */
disk = blkid_probe_get_devno(probe);
if (!disk)
devno = blkid_probe_get_devno(probe);
if (!devno)
return 0;
/* Get whole disk name (not full path) for this devno */
blkid_devno_to_wholedisk(disk, dev, sizeof(dev), NULL);
blkid_devno_to_wholedisk(devno, wholedisk, sizeof(wholedisk), NULL);
snprintf(path, PATH_MAX, "/sys/block/%s/queue/rotational", dev);
snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational",
wholedisk);
blkid_free_probe(probe);
fd = open(path, O_RDONLY);
fd = open(sysfs_path, O_RDONLY);
if (fd < 0) {
return 0;
}