![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
513 lines
12 KiB
C
513 lines
12 KiB
C
/* Bluetooth HCI driver model support. */
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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static struct class *bt_class;
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struct dentry *bt_debugfs = NULL;
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EXPORT_SYMBOL_GPL(bt_debugfs);
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static struct workqueue_struct *bt_workq;
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static inline char *link_typetostr(int type)
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{
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switch (type) {
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case ACL_LINK:
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return "ACL";
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case SCO_LINK:
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return "SCO";
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case ESCO_LINK:
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return "eSCO";
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default:
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return "UNKNOWN";
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}
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}
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static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", link_typetostr(conn->type));
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}
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static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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bdaddr_t bdaddr;
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baswap(&bdaddr, &conn->dst);
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return sprintf(buf, "%s\n", batostr(&bdaddr));
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}
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static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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conn->features[0], conn->features[1],
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conn->features[2], conn->features[3],
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conn->features[4], conn->features[5],
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conn->features[6], conn->features[7]);
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}
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#define LINK_ATTR(_name,_mode,_show,_store) \
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struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
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static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
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static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
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static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
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static struct attribute *bt_link_attrs[] = {
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&link_attr_type.attr,
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&link_attr_address.attr,
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&link_attr_features.attr,
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NULL
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};
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static struct attribute_group bt_link_group = {
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.attrs = bt_link_attrs,
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};
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static const struct attribute_group *bt_link_groups[] = {
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&bt_link_group,
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NULL
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};
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static void bt_link_release(struct device *dev)
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{
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void *data = dev_get_drvdata(dev);
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kfree(data);
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}
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static struct device_type bt_link = {
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.name = "link",
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.groups = bt_link_groups,
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.release = bt_link_release,
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};
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static void add_conn(struct work_struct *work)
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{
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struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
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struct hci_dev *hdev = conn->hdev;
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dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
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dev_set_drvdata(&conn->dev, conn);
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if (device_add(&conn->dev) < 0) {
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BT_ERR("Failed to register connection device");
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return;
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}
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hci_dev_hold(hdev);
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}
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/*
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* The rfcomm tty device will possibly retain even when conn
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* is down, and sysfs doesn't support move zombie device,
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* so we should move the device before conn device is destroyed.
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*/
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static int __match_tty(struct device *dev, void *data)
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{
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return !strncmp(dev_name(dev), "rfcomm", 6);
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}
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static void del_conn(struct work_struct *work)
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{
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struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
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struct hci_dev *hdev = conn->hdev;
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if (!device_is_registered(&conn->dev))
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return;
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while (1) {
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struct device *dev;
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dev = device_find_child(&conn->dev, NULL, __match_tty);
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if (!dev)
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break;
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device_move(dev, NULL, DPM_ORDER_DEV_LAST);
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put_device(dev);
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}
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device_del(&conn->dev);
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put_device(&conn->dev);
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hci_dev_put(hdev);
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}
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void hci_conn_init_sysfs(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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BT_DBG("conn %p", conn);
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conn->dev.type = &bt_link;
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conn->dev.class = bt_class;
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conn->dev.parent = &hdev->dev;
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device_initialize(&conn->dev);
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INIT_WORK(&conn->work_add, add_conn);
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INIT_WORK(&conn->work_del, del_conn);
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}
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void hci_conn_add_sysfs(struct hci_conn *conn)
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{
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BT_DBG("conn %p", conn);
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queue_work(bt_workq, &conn->work_add);
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}
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void hci_conn_del_sysfs(struct hci_conn *conn)
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{
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BT_DBG("conn %p", conn);
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queue_work(bt_workq, &conn->work_del);
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}
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static inline char *host_bustostr(int bus)
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{
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switch (bus) {
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case HCI_VIRTUAL:
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return "VIRTUAL";
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case HCI_USB:
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return "USB";
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case HCI_PCCARD:
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return "PCCARD";
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case HCI_UART:
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return "UART";
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case HCI_RS232:
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return "RS232";
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case HCI_PCI:
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return "PCI";
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case HCI_SDIO:
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return "SDIO";
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default:
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return "UNKNOWN";
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}
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}
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static inline char *host_typetostr(int type)
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{
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switch (type) {
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case HCI_BREDR:
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return "BR/EDR";
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case HCI_80211:
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return "802.11";
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default:
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return "UNKNOWN";
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}
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}
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static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
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}
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static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
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}
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static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char name[249];
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int i;
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for (i = 0; i < 248; i++)
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name[i] = hdev->dev_name[i];
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name[248] = '\0';
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return sprintf(buf, "%s\n", name);
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}
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static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "0x%.2x%.2x%.2x\n",
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hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
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}
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static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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bdaddr_t bdaddr;
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baswap(&bdaddr, &hdev->bdaddr);
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return sprintf(buf, "%s\n", batostr(&bdaddr));
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}
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static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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hdev->features[0], hdev->features[1],
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hdev->features[2], hdev->features[3],
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hdev->features[4], hdev->features[5],
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hdev->features[6], hdev->features[7]);
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}
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static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->manufacturer);
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}
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static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->hci_ver);
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}
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static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->hci_rev);
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}
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static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->idle_timeout);
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}
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static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u32 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val != 0 && (val < 500 || val > 3600000))
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return -EINVAL;
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hdev->idle_timeout = val;
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return count;
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}
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static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->sniff_max_interval);
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}
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static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u16 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val < 0x0002 || val > 0xFFFE || val % 2)
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return -EINVAL;
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if (val < hdev->sniff_min_interval)
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return -EINVAL;
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hdev->sniff_max_interval = val;
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return count;
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}
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static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->sniff_min_interval);
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}
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static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u16 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val < 0x0002 || val > 0xFFFE || val % 2)
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return -EINVAL;
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if (val > hdev->sniff_max_interval)
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return -EINVAL;
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hdev->sniff_min_interval = val;
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return count;
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}
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static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
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static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
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static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
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static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
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static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
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static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
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static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
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static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
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static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
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static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
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show_idle_timeout, store_idle_timeout);
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static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
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show_sniff_max_interval, store_sniff_max_interval);
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static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
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show_sniff_min_interval, store_sniff_min_interval);
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static struct attribute *bt_host_attrs[] = {
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&dev_attr_bus.attr,
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&dev_attr_type.attr,
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&dev_attr_name.attr,
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&dev_attr_class.attr,
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&dev_attr_address.attr,
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&dev_attr_features.attr,
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&dev_attr_manufacturer.attr,
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&dev_attr_hci_version.attr,
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&dev_attr_hci_revision.attr,
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&dev_attr_idle_timeout.attr,
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&dev_attr_sniff_max_interval.attr,
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&dev_attr_sniff_min_interval.attr,
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NULL
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};
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static struct attribute_group bt_host_group = {
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.attrs = bt_host_attrs,
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};
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static const struct attribute_group *bt_host_groups[] = {
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&bt_host_group,
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NULL
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};
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static void bt_host_release(struct device *dev)
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{
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void *data = dev_get_drvdata(dev);
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kfree(data);
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}
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static struct device_type bt_host = {
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.name = "host",
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.groups = bt_host_groups,
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.release = bt_host_release,
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};
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static int inquiry_cache_show(struct seq_file *f, void *p)
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{
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struct hci_dev *hdev = f->private;
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struct inquiry_cache *cache = &hdev->inq_cache;
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struct inquiry_entry *e;
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hci_dev_lock_bh(hdev);
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for (e = cache->list; e; e = e->next) {
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struct inquiry_data *data = &e->data;
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bdaddr_t bdaddr;
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baswap(&bdaddr, &data->bdaddr);
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seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
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batostr(&bdaddr),
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data->pscan_rep_mode, data->pscan_period_mode,
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data->pscan_mode, data->dev_class[2],
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data->dev_class[1], data->dev_class[0],
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__le16_to_cpu(data->clock_offset),
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data->rssi, data->ssp_mode, e->timestamp);
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}
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hci_dev_unlock_bh(hdev);
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return 0;
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}
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static int inquiry_cache_open(struct inode *inode, struct file *file)
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{
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return single_open(file, inquiry_cache_show, inode->i_private);
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}
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static const struct file_operations inquiry_cache_fops = {
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.open = inquiry_cache_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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int hci_register_sysfs(struct hci_dev *hdev)
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{
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struct device *dev = &hdev->dev;
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int err;
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|
BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
|
|
|
|
dev->type = &bt_host;
|
|
dev->class = bt_class;
|
|
dev->parent = hdev->parent;
|
|
|
|
dev_set_name(dev, "%s", hdev->name);
|
|
|
|
dev_set_drvdata(dev, hdev);
|
|
|
|
err = device_register(dev);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (!bt_debugfs)
|
|
return 0;
|
|
|
|
hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
|
|
if (!hdev->debugfs)
|
|
return 0;
|
|
|
|
debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
|
|
hdev, &inquiry_cache_fops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void hci_unregister_sysfs(struct hci_dev *hdev)
|
|
{
|
|
BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
|
|
|
|
debugfs_remove_recursive(hdev->debugfs);
|
|
|
|
device_del(&hdev->dev);
|
|
}
|
|
|
|
int __init bt_sysfs_init(void)
|
|
{
|
|
bt_workq = create_singlethread_workqueue("bluetooth");
|
|
if (!bt_workq)
|
|
return -ENOMEM;
|
|
|
|
bt_debugfs = debugfs_create_dir("bluetooth", NULL);
|
|
|
|
bt_class = class_create(THIS_MODULE, "bluetooth");
|
|
if (IS_ERR(bt_class)) {
|
|
destroy_workqueue(bt_workq);
|
|
return PTR_ERR(bt_class);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void bt_sysfs_cleanup(void)
|
|
{
|
|
class_destroy(bt_class);
|
|
|
|
debugfs_remove_recursive(bt_debugfs);
|
|
|
|
destroy_workqueue(bt_workq);
|
|
}
|