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o use dev_name(dev) to get the name of a device, this operation is cheap

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since it just get's the first alias.
This commit is contained in:
Joe Thornber
2001-10-25 14:04:18 +00:00
parent 3cfae6cfce
commit c7f0b573ac
16 changed files with 78 additions and 82 deletions
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23
lib/device/dev-io.c
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@@ -19,16 +19,17 @@ int dev_get_size(struct device *dev, uint64_t *size)
{
int fd;
long s;
const char *name = dev_name(dev);
log_very_verbose("Getting size of %s", dev->name);
if ((fd = open(dev->name, O_RDONLY)) < 0) {
log_sys_error("open", dev->name);
log_very_verbose("Getting size of %s", name);
if ((fd = open(name, O_RDONLY)) < 0) {
log_sys_error("open", name);
return 0;
}
/* FIXME: add 64 bit ioctl */
if (ioctl(fd, BLKGETSIZE, &s) < 0) {
log_sys_error("ioctl BLKGETSIZE", dev->name);
log_sys_error("ioctl BLKGETSIZE", name);
close(fd);
return 0;
}
@@ -66,15 +67,16 @@ int64_t dev_read(struct device *dev, uint64_t offset,
int64_t len, void *buffer)
{
int64_t r;
int fd = open(dev->name, O_RDONLY);
const char *name = dev_name(dev);
int fd = open(name, O_RDONLY);
if (fd < 0) {
log_sys_very_verbose("open", dev->name);
log_sys_very_verbose("open", name);
return 0;
}
if (lseek(fd, offset, SEEK_SET) < 0) {
log_sys_error("lseek", dev->name);
log_sys_error("lseek", name);
return 0;
}
@@ -107,15 +109,16 @@ int64_t dev_write(struct device *dev, uint64_t offset,
int64_t len, void *buffer)
{
int64_t r;
int fd = open(dev->name, O_WRONLY);
const char *name = dev_name(dev);
int fd = open(name, O_WRONLY);
if (fd < 0) {
log_sys_error("open", dev->name);
log_sys_error("open", name);
return 0;
}
if (lseek(fd, offset, SEEK_SET) < 0) {
log_sys_error("lseek", dev->name);
log_sys_error("lseek", name);
return 0;
}