>From: Niranjan Dighe <ndighe@xxxxxxxxxxx> > >Remove IOC_LIBCFS_MEMHOG ioctl functionality as it is no longer needed thereby >making functions like - kportal_memhog_alloc(), kportal_memhog_free() and type - >struct libcfs_device_userstate unused. Actually so much more can be cleaned up. This work is also being done at http://review.whamcloud.com/#/c/17492. I will update that patch and post it here as well. Signed-off-by: Niranjan Dighe <ndighe@xxxxxxxxxxx> --- .../lustre/include/linux/libcfs/libcfs_private.h | 5 - .../lustre/lustre/libcfs/linux/linux-module.c | 14 +- drivers/staging/lustre/lustre/libcfs/module.c | 139 -------------------- 3 files changed, 2 insertions(+), 156 deletions(-) diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h index d6273e1..e044d6f 100644 --- a/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h +++ b/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h @@ -391,11 +391,6 @@ int cfs_percpt_atomic_summary(atomic_t **refs); * Support for temporary event tracing with minimal Heisenberg effect. * -------------------------------------------------------------------- */ -struct libcfs_device_userstate { - int ldu_memhog_pages; - struct page *ldu_memhog_root_page; -}; - #define MKSTR(ptr) ((ptr)) ? (ptr) : "" static inline int cfs_size_round4(int val) diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c index 70a99cf0..eccfe8bd 100644 --- a/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c +++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-module.c @@ -98,14 +98,12 @@ int libcfs_ioctl_popdata(void *arg, void *data, int size) static int libcfs_psdev_open(struct inode *inode, struct file *file) { - struct libcfs_device_userstate **pdu = NULL; int rc = 0; if (!inode) return -EINVAL; - pdu = (struct libcfs_device_userstate **)&file->private_data; if (libcfs_psdev_ops.p_open != NULL) - rc = libcfs_psdev_ops.p_open(0, (void *)pdu); + rc = libcfs_psdev_ops.p_open(0, NULL); else return -EPERM; return rc; @@ -115,14 +113,12 @@ libcfs_psdev_open(struct inode *inode, struct file *file) static int libcfs_psdev_release(struct inode *inode, struct file *file) { - struct libcfs_device_userstate *pdu; int rc = 0; if (!inode) return -EINVAL; - pdu = file->private_data; if (libcfs_psdev_ops.p_close != NULL) - rc = libcfs_psdev_ops.p_close(0, (void *)pdu); + rc = libcfs_psdev_ops.p_close(0, NULL); else rc = -EPERM; return rc; @@ -152,14 +148,8 @@ static long libcfs_ioctl(struct file *file, return -EPERM; panic("debugctl-invoked panic"); return 0; - case IOC_LIBCFS_MEMHOG: - if (!capable(CFS_CAP_SYS_ADMIN)) - return -EPERM; - /* go thought */ } - pfile.off = 0; - pfile.private_data = file->private_data; if (libcfs_psdev_ops.p_ioctl != NULL) rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void *)arg); else diff --git a/drivers/staging/lustre/lustre/libcfs/module.c b/drivers/staging/lustre/lustre/libcfs/module.c index 329d78c..0067e53 100644 --- a/drivers/staging/lustre/lustre/libcfs/module.c +++ b/drivers/staging/lustre/lustre/libcfs/module.c @@ -68,142 +68,16 @@ MODULE_LICENSE("GPL"); static struct dentry *lnet_debugfs_root; -static void kportal_memhog_free(struct libcfs_device_userstate *ldu) -{ - struct page **level0p = &ldu->ldu_memhog_root_page; - struct page **level1p; - struct page **level2p; - int count1; - int count2; - - if (*level0p != NULL) { - - level1p = (struct page **)page_address(*level0p); - count1 = 0; - - while (count1 < PAGE_CACHE_SIZE/sizeof(struct page *) && - *level1p != NULL) { - - level2p = (struct page **)page_address(*level1p); - count2 = 0; - - while (count2 < PAGE_CACHE_SIZE/sizeof(struct page *) && - *level2p != NULL) { - - __free_page(*level2p); - ldu->ldu_memhog_pages--; - level2p++; - count2++; - } - - __free_page(*level1p); - ldu->ldu_memhog_pages--; - level1p++; - count1++; - } - - __free_page(*level0p); - ldu->ldu_memhog_pages--; - - *level0p = NULL; - } - - LASSERT(ldu->ldu_memhog_pages == 0); -} - -static int kportal_memhog_alloc(struct libcfs_device_userstate *ldu, int npages, - gfp_t flags) -{ - struct page **level0p; - struct page **level1p; - struct page **level2p; - int count1; - int count2; - - LASSERT(ldu->ldu_memhog_pages == 0); - LASSERT(ldu->ldu_memhog_root_page == NULL); - - if (npages < 0) - return -EINVAL; - - if (npages == 0) - return 0; - - level0p = &ldu->ldu_memhog_root_page; - *level0p = alloc_page(flags); - if (*level0p == NULL) - return -ENOMEM; - ldu->ldu_memhog_pages++; - - level1p = (struct page **)page_address(*level0p); - count1 = 0; - memset(level1p, 0, PAGE_CACHE_SIZE); - - while (ldu->ldu_memhog_pages < npages && - count1 < PAGE_CACHE_SIZE/sizeof(struct page *)) { - - if (cfs_signal_pending()) - return -EINTR; - - *level1p = alloc_page(flags); - if (*level1p == NULL) - return -ENOMEM; - ldu->ldu_memhog_pages++; - - level2p = (struct page **)page_address(*level1p); - count2 = 0; - memset(level2p, 0, PAGE_CACHE_SIZE); - - while (ldu->ldu_memhog_pages < npages && - count2 < PAGE_CACHE_SIZE/sizeof(struct page *)) { - - if (cfs_signal_pending()) - return -EINTR; - - *level2p = alloc_page(flags); - if (*level2p == NULL) - return -ENOMEM; - ldu->ldu_memhog_pages++; - - level2p++; - count2++; - } - - level1p++; - count1++; - } - - return 0; -} - /* called when opening /dev/device */ static int libcfs_psdev_open(unsigned long flags, void *args) { - struct libcfs_device_userstate *ldu; - try_module_get(THIS_MODULE); - - LIBCFS_ALLOC(ldu, sizeof(*ldu)); - if (ldu != NULL) { - ldu->ldu_memhog_pages = 0; - ldu->ldu_memhog_root_page = NULL; - } - *(struct libcfs_device_userstate **)args = ldu; - return 0; } /* called when closing /dev/device */ static int libcfs_psdev_release(unsigned long flags, void *args) { - struct libcfs_device_userstate *ldu; - - ldu = (struct libcfs_device_userstate *)args; - if (ldu != NULL) { - kportal_memhog_free(ldu); - LIBCFS_FREE(ldu, sizeof(*ldu)); - } - module_put(THIS_MODULE); return 0; } @@ -260,19 +134,6 @@ static int libcfs_ioctl_int(struct cfs_psdev_file *pfile, unsigned long cmd, return -EINVAL; libcfs_debug_mark_buffer(data->ioc_inlbuf1); return 0; - case IOC_LIBCFS_MEMHOG: - if (pfile->private_data == NULL) { - err = -EINVAL; - } else { - kportal_memhog_free(pfile->private_data); - /* XXX The ioc_flags is not GFP flags now, need to be fixed */ - err = kportal_memhog_alloc(pfile->private_data, - data->ioc_count, - data->ioc_flags); - if (err != 0) - kportal_memhog_free(pfile->private_data); - } - break; default: { struct libcfs_ioctl_handler *hand; -- 1.7.9.5 _______________________________________________ lustre-devel mailing list lustre-devel@xxxxxxxxxxxxxxxx http://lists.lustre.org/listinfo.cgi/lustre-devel-lustre.org _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
