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Commit af1c35a5 authored by Paolo Savini's avatar Paolo Savini Committed by Federico Vaga
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Enumerate channels and channel-sets in sysfs 

Create a sysfs symlink for backward compatibility using cset/chan name
Signed-off-by: Paolo Savini's avatarPaolo Savini <il.paolo.savini@gmail.com>
Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent 45506166
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Showing with 40 additions and 10 deletions
objects.c
View file @ af1c35a5
......@@ -637,6 +637,29 @@ static uint16_t __get_nbits(struct zio_channel *chan)
/* The attr. is optional, so devices with no attributes are allowed */
return chan->cset->ssize * BITS_PER_BYTE;
}
static void zobj_create_link(struct zio_obj_head *head)
{
int err;
/* Create the symlink with custom channel name */
if (strlen(head->name) == 0)
return;
err = sysfs_create_link(&head->dev.parent->kobj, &head->dev.kobj,
head->name);
if (err)
pr_warn("ZIO: not able to create the symlinks\n");
}
static void zobj_remove_link(struct zio_obj_head *head)
{
if (strlen(head->name) == 0)
return;
sysfs_remove_link(&head->dev.parent->kobj, head->name);
}
/*
* chan_register
*
......@@ -654,6 +677,8 @@ static int chan_register(struct zio_channel *chan, struct zio_channel *chan_t)
{
struct zio_control *ctrl;
struct zio_bi *bi;
char *fmtname;
char chan_name[ZIO_NAME_LEN];
int err, i;
if (!chan)
......@@ -702,15 +727,12 @@ static int chan_register(struct zio_channel *chan, struct zio_channel *chan_t)
chan->current_ctrl = ctrl;
/* Initialize and register channel device */
if (strlen(chan->head.name) == 0) {
char *mask;
mask = chan->flags & ZIO_CSET_CHAN_INTERLEAVE ? "chani" :
"chan%i";
snprintf(chan->head.name, ZIO_NAME_LEN, mask, chan->index);
}
dev_set_name(&chan->head.dev, chan->head.name);
fmtname = (chan->flags & ZIO_CSET_CHAN_INTERLEAVE) ? "chani" : "chan%i";
snprintf(chan_name, ZIO_NAME_LEN, fmtname, chan->index);
dev_set_name(&chan->head.dev, chan_name);
chan->head.dev.type = &chan_device_type;
chan->head.dev.parent = &chan->cset->head.dev;
err = device_register(&chan->head.dev);
if (err)
goto out_ctrl_bits;
......@@ -723,6 +745,9 @@ static int chan_register(struct zio_channel *chan, struct zio_channel *chan_t)
goto out_bin_attr;
}
}
zobj_create_link(&chan->head);
/* Create buffer */
bi = __bi_create(chan->cset->zbuf, chan, "buffer");
if (IS_ERR(bi)) {
......@@ -769,6 +794,7 @@ static void chan_unregister(struct zio_channel *chan)
for (i = 0; i < __ZIO_BIN_ATTR_NUM; ++i)
sysfs_remove_bin_file(&chan->head.dev.kobj,
&zio_bin_attr[i]);
zobj_remove_link(&chan->head);
device_unregister(&chan->head.dev);
}
......@@ -856,6 +882,7 @@ static int cset_register(struct zio_cset *cset, struct zio_cset *cset_t)
{
int i, j, err = 0, size;
unsigned long flags;
char cset_name[ZIO_NAME_LEN];
struct zio_channel *chan_tmp;
struct zio_ti *ti = NULL;
......@@ -885,15 +912,17 @@ static int cset_register(struct zio_cset *cset, struct zio_cset *cset_t)
goto out_zattr_check;
/* Initialize and register zio device */
if (strlen(cset->head.name) == 0)
snprintf(cset->head.name, ZIO_NAME_LEN, "cset%i", cset->index);
dev_set_name(&cset->head.dev, cset->head.name);
snprintf(cset_name, ZIO_NAME_LEN, "cset%i", cset->index);
dev_set_name(&cset->head.dev, cset_name);
spin_lock_init(&cset->lock);
cset->head.dev.type = &cset_device_type;
cset->head.dev.parent = &cset->zdev->head.dev;
err = device_register(&cset->head.dev);
if (err)
goto out_zattr_check;
zobj_create_link(&cset->head);
/*
* The cset must have a buffer type. If none is associated
* to the cset, ZIO selects the preferred or default one.
......@@ -998,6 +1027,7 @@ static void cset_unregister(struct zio_cset *cset)
/* destroy instance and decrement trigger usage */
__ti_destroy(cset->trig, cset->ti);
zobj_remove_link(&cset->head);
device_unregister(&cset->head.dev);
}
......
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