/* net/atm/addr.c - Local ATM address registry */ /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ #include #include #include #include #include "signaling.h" #include "addr.h" static int check_addr(const struct sockaddr_atmsvc *addr) { int i; if (addr->sas_family != AF_ATMSVC) return -EAFNOSUPPORT; if (!*addr->sas_addr.pub) return *addr->sas_addr.prv ? 0 : -EINVAL; for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */ if (!addr->sas_addr.pub[i]) return 0; return -EINVAL; } static int identical(const struct sockaddr_atmsvc *a, const struct sockaddr_atmsvc *b) { if (*a->sas_addr.prv) if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN)) return 0; if (!*a->sas_addr.pub) return !*b->sas_addr.pub; if (!*b->sas_addr.pub) return 0; return !strcmp(a->sas_addr.pub, b->sas_addr.pub); } static void notify_sigd(const struct atm_dev *dev) { struct sockaddr_atmpvc pvc; pvc.sap_addr.itf = dev->number; sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL); } void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this, *p; struct list_head *head; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry_safe(this, p, head, entry) { list_del(&this->entry); kfree(this); } spin_unlock_irqrestore(&dev->lock, flags); if (head == &dev->local) notify_sigd(dev); } int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this; struct list_head *head; int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) { if (identical(&this->addr, addr)) { spin_unlock_irqrestore(&dev->lock, flags); return -EEXIST; } } this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC); if (!this) { spin_unlock_irqrestore(&dev->lock, flags); return -ENOMEM; } this->addr = *addr; list_add(&this->entry, head); spin_unlock_irqrestore(&dev->lock, flags); if (head == &dev->local) notify_sigd(dev); return 0; } int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this; struct list_head *head; int error; error = check_addr(addr); if (error) return error; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) { if (identical(&this->addr, addr)) { list_del(&this->entry); spin_unlock_irqrestore(&dev->lock, flags); kfree(this); if (head == &dev->local) notify_sigd(dev); return 0; } } spin_unlock_irqrestore(&dev->lock, flags); return -ENOENT; } int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf, size_t size, enum atm_addr_type_t atype) { unsigned long flags; struct atm_dev_addr *this; struct list_head *head; int total = 0, error; struct sockaddr_atmsvc *tmp_buf, *tmp_bufp; spin_lock_irqsave(&dev->lock, flags); if (atype == ATM_ADDR_LECS) head = &dev->lecs; else head = &dev->local; list_for_each_entry(this, head, entry) total += sizeof(struct sockaddr_atmsvc); tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC); if (!tmp_buf) { spin_unlock_irqrestore(&dev->lock, flags); return -ENOMEM; } list_for_each_entry(this, head, entry) memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc)); spin_unlock_irqrestore(&dev->lock, flags); error = total > size ? -E2BIG : total; if (copy_to_user(buf, tmp_buf, total < size ? total : size)) error = -EFAULT; kfree(tmp_buf); return error; } option>space:mode:
authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-12-09 19:53:05 +0100
committerJonathan Corbet <corbet@lwn.net>2016-12-11 13:37:55 -0700
commit868c97a846a73e937d835b09b8c885a69df50ec8 (patch)
tree9cdc05e799d117ac71b29d0958ee3dc65b8d539d /Documentation/usb/usb-help.txt
parent9e22ff439fa2e1201b168c001683f275afd46258 (diff)
dma-buf: Extract dma-buf.rst
Just prep work to polish and consolidate all the dma-buf related documenation. Unfortunately I didn't discover a way to both integrate this new file into the overall toc while keeping it at the current place. Work around that by moving it into the overall driver-api/index.rst. Cc: linux-doc@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Cc: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/usb/usb-help.txt')