diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-10 14:48:50 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-10 14:48:50 -0700 |
commit | 8d10aae2741ec9ffd53c8d214f7ada6d543b3a46 (patch) | |
tree | 08e8cc6a787484589e22d1d7c1b58300a763d9ef /drivers | |
parent | 6664565681a1c0c95607ae2e30070352d9a563d0 (diff) | |
parent | 09a34c8404c1d4c5782de319c02e1d742c57875c (diff) | |
download | linux-8d10aae2741ec9ffd53c8d214f7ada6d543b3a46.tar.bz2 |
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost fixes and cleanups from Michael S Tsirkin:
"This includes some fixes and cleanups for vhost net and scsi drivers"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost/test: update test after vhost cleanups
vhost: Make local function static
vhost: Make vhost a separate module
vhost-scsi: Rename struct tcm_vhost_cmd *tv_cmd to *cmd
vhost-scsi: Rename struct tcm_vhost_tpg *tv_tpg to *tpg
vhost-scsi: Make func indention more consistent
vhost-scsi: Rename struct vhost_scsi *s to *vs
vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration
vhost: Simplify dev->vqs[i] access
vhost-net: fix use-after-free in vhost_net_flush
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/vhost/Kconfig | 8 | ||||
-rw-r--r-- | drivers/vhost/Makefile | 3 | ||||
-rw-r--r-- | drivers/vhost/net.c | 4 | ||||
-rw-r--r-- | drivers/vhost/scsi.c | 472 | ||||
-rw-r--r-- | drivers/vhost/test.c | 33 | ||||
-rw-r--r-- | drivers/vhost/vhost.c | 86 | ||||
-rw-r--r-- | drivers/vhost/vhost.h | 2 |
7 files changed, 349 insertions, 259 deletions
diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig index 8b9226da3f54..017a1e8a8f6f 100644 --- a/drivers/vhost/Kconfig +++ b/drivers/vhost/Kconfig @@ -1,6 +1,7 @@ config VHOST_NET tristate "Host kernel accelerator for virtio net" depends on NET && EVENTFD && (TUN || !TUN) && (MACVTAP || !MACVTAP) + select VHOST select VHOST_RING ---help--- This kernel module can be loaded in host kernel to accelerate @@ -13,6 +14,7 @@ config VHOST_NET config VHOST_SCSI tristate "VHOST_SCSI TCM fabric driver" depends on TARGET_CORE && EVENTFD && m + select VHOST select VHOST_RING default n ---help--- @@ -24,3 +26,9 @@ config VHOST_RING ---help--- This option is selected by any driver which needs to access the host side of a virtio ring. + +config VHOST + tristate + ---help--- + This option is selected by any driver which needs to access + the core of vhost. diff --git a/drivers/vhost/Makefile b/drivers/vhost/Makefile index 654e9afb11f5..e0441c34db1c 100644 --- a/drivers/vhost/Makefile +++ b/drivers/vhost/Makefile @@ -1,7 +1,8 @@ obj-$(CONFIG_VHOST_NET) += vhost_net.o -vhost_net-y := vhost.o net.o +vhost_net-y := net.o obj-$(CONFIG_VHOST_SCSI) += vhost_scsi.o vhost_scsi-y := scsi.o obj-$(CONFIG_VHOST_RING) += vringh.o +obj-$(CONFIG_VHOST) += vhost.o diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 8ca5ac71b845..027be91db139 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -168,7 +168,7 @@ static void vhost_net_clear_ubuf_info(struct vhost_net *n) } } -int vhost_net_set_ubuf_info(struct vhost_net *n) +static int vhost_net_set_ubuf_info(struct vhost_net *n) { bool zcopy; int i; @@ -189,7 +189,7 @@ err: return -ENOMEM; } -void vhost_net_vq_reset(struct vhost_net *n) +static void vhost_net_vq_reset(struct vhost_net *n) { int i; diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 701420297225..4264840ef7dc 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -49,7 +49,6 @@ #include <linux/llist.h> #include <linux/bitmap.h> -#include "vhost.c" #include "vhost.h" #define TCM_VHOST_VERSION "v0.1" @@ -116,7 +115,6 @@ struct tcm_vhost_nacl { struct se_node_acl se_node_acl; }; -struct vhost_scsi; struct tcm_vhost_tpg { /* Vhost port target portal group tag for TCM */ u16 tport_tpgt; @@ -218,7 +216,7 @@ static int iov_num_pages(struct iovec *iov) ((unsigned long)iov->iov_base & PAGE_MASK)) >> PAGE_SHIFT; } -void tcm_vhost_done_inflight(struct kref *kref) +static void tcm_vhost_done_inflight(struct kref *kref) { struct vhost_scsi_inflight *inflight; @@ -329,11 +327,12 @@ static u32 tcm_vhost_get_default_depth(struct se_portal_group *se_tpg) return 1; } -static u32 tcm_vhost_get_pr_transport_id(struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, - int *format_code, - unsigned char *buf) +static u32 +tcm_vhost_get_pr_transport_id(struct se_portal_group *se_tpg, + struct se_node_acl *se_nacl, + struct t10_pr_registration *pr_reg, + int *format_code, + unsigned char *buf) { struct tcm_vhost_tpg *tpg = container_of(se_tpg, struct tcm_vhost_tpg, se_tpg); @@ -359,10 +358,11 @@ static u32 tcm_vhost_get_pr_transport_id(struct se_portal_group *se_tpg, format_code, buf); } -static u32 tcm_vhost_get_pr_transport_id_len(struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, - int *format_code) +static u32 +tcm_vhost_get_pr_transport_id_len(struct se_portal_group *se_tpg, + struct se_node_acl *se_nacl, + struct t10_pr_registration *pr_reg, + int *format_code) { struct tcm_vhost_tpg *tpg = container_of(se_tpg, struct tcm_vhost_tpg, se_tpg); @@ -388,10 +388,11 @@ static u32 tcm_vhost_get_pr_transport_id_len(struct se_portal_group *se_tpg, format_code); } -static char *tcm_vhost_parse_pr_out_transport_id(struct se_portal_group *se_tpg, - const char *buf, - u32 *out_tid_len, - char **port_nexus_ptr) +static char * +tcm_vhost_parse_pr_out_transport_id(struct se_portal_group *se_tpg, + const char *buf, + u32 *out_tid_len, + char **port_nexus_ptr) { struct tcm_vhost_tpg *tpg = container_of(se_tpg, struct tcm_vhost_tpg, se_tpg); @@ -417,8 +418,8 @@ static char *tcm_vhost_parse_pr_out_transport_id(struct se_portal_group *se_tpg, port_nexus_ptr); } -static struct se_node_acl *tcm_vhost_alloc_fabric_acl( - struct se_portal_group *se_tpg) +static struct se_node_acl * +tcm_vhost_alloc_fabric_acl(struct se_portal_group *se_tpg) { struct tcm_vhost_nacl *nacl; @@ -431,8 +432,9 @@ static struct se_node_acl *tcm_vhost_alloc_fabric_acl( return &nacl->se_node_acl; } -static void tcm_vhost_release_fabric_acl(struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl) +static void +tcm_vhost_release_fabric_acl(struct se_portal_group *se_tpg, + struct se_node_acl *se_nacl) { struct tcm_vhost_nacl *nacl = container_of(se_nacl, struct tcm_vhost_nacl, se_node_acl); @@ -491,28 +493,28 @@ static int tcm_vhost_get_cmd_state(struct se_cmd *se_cmd) return 0; } -static void vhost_scsi_complete_cmd(struct tcm_vhost_cmd *tv_cmd) +static void vhost_scsi_complete_cmd(struct tcm_vhost_cmd *cmd) { - struct vhost_scsi *vs = tv_cmd->tvc_vhost; + struct vhost_scsi *vs = cmd->tvc_vhost; - llist_add(&tv_cmd->tvc_completion_list, &vs->vs_completion_list); + llist_add(&cmd->tvc_completion_list, &vs->vs_completion_list); vhost_work_queue(&vs->dev, &vs->vs_completion_work); } static int tcm_vhost_queue_data_in(struct se_cmd *se_cmd) { - struct tcm_vhost_cmd *tv_cmd = container_of(se_cmd, + struct tcm_vhost_cmd *cmd = container_of(se_cmd, struct tcm_vhost_cmd, tvc_se_cmd); - vhost_scsi_complete_cmd(tv_cmd); + vhost_scsi_complete_cmd(cmd); return 0; } static int tcm_vhost_queue_status(struct se_cmd *se_cmd) { - struct tcm_vhost_cmd *tv_cmd = container_of(se_cmd, + struct tcm_vhost_cmd *cmd = container_of(se_cmd, struct tcm_vhost_cmd, tvc_se_cmd); - vhost_scsi_complete_cmd(tv_cmd); + vhost_scsi_complete_cmd(cmd); return 0; } @@ -527,8 +529,9 @@ static void tcm_vhost_free_evt(struct vhost_scsi *vs, struct tcm_vhost_evt *evt) kfree(evt); } -static struct tcm_vhost_evt *tcm_vhost_allocate_evt(struct vhost_scsi *vs, - u32 event, u32 reason) +static struct tcm_vhost_evt * +tcm_vhost_allocate_evt(struct vhost_scsi *vs, + u32 event, u32 reason) { struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; struct tcm_vhost_evt *evt; @@ -552,28 +555,28 @@ static struct tcm_vhost_evt *tcm_vhost_allocate_evt(struct vhost_scsi *vs, return evt; } -static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *tv_cmd) +static void vhost_scsi_free_cmd(struct tcm_vhost_cmd *cmd) { - struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd; + struct se_cmd *se_cmd = &cmd->tvc_se_cmd; /* TODO locking against target/backend threads? */ transport_generic_free_cmd(se_cmd, 1); - if (tv_cmd->tvc_sgl_count) { + if (cmd->tvc_sgl_count) { u32 i; - for (i = 0; i < tv_cmd->tvc_sgl_count; i++) - put_page(sg_page(&tv_cmd->tvc_sgl[i])); + for (i = 0; i < cmd->tvc_sgl_count; i++) + put_page(sg_page(&cmd->tvc_sgl[i])); - kfree(tv_cmd->tvc_sgl); + kfree(cmd->tvc_sgl); } - tcm_vhost_put_inflight(tv_cmd->inflight); + tcm_vhost_put_inflight(cmd->inflight); - kfree(tv_cmd); + kfree(cmd); } -static void tcm_vhost_do_evt_work(struct vhost_scsi *vs, - struct tcm_vhost_evt *evt) +static void +tcm_vhost_do_evt_work(struct vhost_scsi *vs, struct tcm_vhost_evt *evt) { struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; struct virtio_scsi_event *event = &evt->event; @@ -652,7 +655,7 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work) vs_completion_work); DECLARE_BITMAP(signal, VHOST_SCSI_MAX_VQ); struct virtio_scsi_cmd_resp v_rsp; - struct tcm_vhost_cmd *tv_cmd; + struct tcm_vhost_cmd *cmd; struct llist_node *llnode; struct se_cmd *se_cmd; int ret, vq; @@ -660,32 +663,32 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work) bitmap_zero(signal, VHOST_SCSI_MAX_VQ); llnode = llist_del_all(&vs->vs_completion_list); while (llnode) { - tv_cmd = llist_entry(llnode, struct tcm_vhost_cmd, + cmd = llist_entry(llnode, struct tcm_vhost_cmd, tvc_completion_list); llnode = llist_next(llnode); - se_cmd = &tv_cmd->tvc_se_cmd; + se_cmd = &cmd->tvc_se_cmd; pr_debug("%s tv_cmd %p resid %u status %#02x\n", __func__, - tv_cmd, se_cmd->residual_count, se_cmd->scsi_status); + cmd, se_cmd->residual_count, se_cmd->scsi_status); memset(&v_rsp, 0, sizeof(v_rsp)); v_rsp.resid = se_cmd->residual_count; /* TODO is status_qualifier field needed? */ v_rsp.status = se_cmd->scsi_status; v_rsp.sense_len = se_cmd->scsi_sense_length; - memcpy(v_rsp.sense, tv_cmd->tvc_sense_buf, + memcpy(v_rsp.sense, cmd->tvc_sense_buf, v_rsp.sense_len); - ret = copy_to_user(tv_cmd->tvc_resp, &v_rsp, sizeof(v_rsp)); + ret = copy_to_user(cmd->tvc_resp, &v_rsp, sizeof(v_rsp)); if (likely(ret == 0)) { struct vhost_scsi_virtqueue *q; - vhost_add_used(tv_cmd->tvc_vq, tv_cmd->tvc_vq_desc, 0); - q = container_of(tv_cmd->tvc_vq, struct vhost_scsi_virtqueue, vq); + vhost_add_used(cmd->tvc_vq, cmd->tvc_vq_desc, 0); + q = container_of(cmd->tvc_vq, struct vhost_scsi_virtqueue, vq); vq = q - vs->vqs; __set_bit(vq, signal); } else pr_err("Faulted on virtio_scsi_cmd_resp\n"); - vhost_scsi_free_cmd(tv_cmd); + vhost_scsi_free_cmd(cmd); } vq = -1; @@ -694,35 +697,35 @@ static void vhost_scsi_complete_cmd_work(struct vhost_work *work) vhost_signal(&vs->dev, &vs->vqs[vq].vq); } -static struct tcm_vhost_cmd *vhost_scsi_allocate_cmd( - struct vhost_virtqueue *vq, - struct tcm_vhost_tpg *tv_tpg, - struct virtio_scsi_cmd_req *v_req, - u32 exp_data_len, - int data_direction) +static struct tcm_vhost_cmd * +vhost_scsi_allocate_cmd(struct vhost_virtqueue *vq, + struct tcm_vhost_tpg *tpg, + struct virtio_scsi_cmd_req *v_req, + u32 exp_data_len, + int data_direction) { - struct tcm_vhost_cmd *tv_cmd; + struct tcm_vhost_cmd *cmd; struct tcm_vhost_nexus *tv_nexus; - tv_nexus = tv_tpg->tpg_nexus; + tv_nexus = tpg->tpg_nexus; if (!tv_nexus) { pr_err("Unable to locate active struct tcm_vhost_nexus\n"); return ERR_PTR(-EIO); } - tv_cmd = kzalloc(sizeof(struct tcm_vhost_cmd), GFP_ATOMIC); - if (!tv_cmd) { + cmd = kzalloc(sizeof(struct tcm_vhost_cmd), GFP_ATOMIC); + if (!cmd) { pr_err("Unable to allocate struct tcm_vhost_cmd\n"); return ERR_PTR(-ENOMEM); } - tv_cmd->tvc_tag = v_req->tag; - tv_cmd->tvc_task_attr = v_req->task_attr; - tv_cmd->tvc_exp_data_len = exp_data_len; - tv_cmd->tvc_data_direction = data_direction; - tv_cmd->tvc_nexus = tv_nexus; - tv_cmd->inflight = tcm_vhost_get_inflight(vq); + cmd->tvc_tag = v_req->tag; + cmd->tvc_task_attr = v_req->task_attr; + cmd->tvc_exp_data_len = exp_data_len; + cmd->tvc_data_direction = data_direction; + cmd->tvc_nexus = tv_nexus; + cmd->inflight = tcm_vhost_get_inflight(vq); - return tv_cmd; + return cmd; } /* @@ -730,8 +733,11 @@ static struct tcm_vhost_cmd *vhost_scsi_allocate_cmd( * * Returns the number of scatterlist entries used or -errno on error. */ -static int vhost_scsi_map_to_sgl(struct scatterlist *sgl, - unsigned int sgl_count, struct iovec *iov, int write) +static int +vhost_scsi_map_to_sgl(struct scatterlist *sgl, + unsigned int sgl_count, + struct iovec *iov, + int write) { unsigned int npages = 0, pages_nr, offset, nbytes; struct scatterlist *sg = sgl; @@ -775,8 +781,11 @@ out: return ret; } -static int vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *tv_cmd, - struct iovec *iov, unsigned int niov, int write) +static int +vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *cmd, + struct iovec *iov, + unsigned int niov, + int write) { int ret; unsigned int i; @@ -792,25 +801,25 @@ static int vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *tv_cmd, /* TODO overflow checking */ - sg = kmalloc(sizeof(tv_cmd->tvc_sgl[0]) * sgl_count, GFP_ATOMIC); + sg = kmalloc(sizeof(cmd->tvc_sgl[0]) * sgl_count, GFP_ATOMIC); if (!sg) return -ENOMEM; pr_debug("%s sg %p sgl_count %u is_err %d\n", __func__, sg, sgl_count, !sg); sg_init_table(sg, sgl_count); - tv_cmd->tvc_sgl = sg; - tv_cmd->tvc_sgl_count = sgl_count; + cmd->tvc_sgl = sg; + cmd->tvc_sgl_count = sgl_count; pr_debug("Mapping %u iovecs for %u pages\n", niov, sgl_count); for (i = 0; i < niov; i++) { ret = vhost_scsi_map_to_sgl(sg, sgl_count, &iov[i], write); if (ret < 0) { - for (i = 0; i < tv_cmd->tvc_sgl_count; i++) - put_page(sg_page(&tv_cmd->tvc_sgl[i])); - kfree(tv_cmd->tvc_sgl); - tv_cmd->tvc_sgl = NULL; - tv_cmd->tvc_sgl_count = 0; + for (i = 0; i < cmd->tvc_sgl_count; i++) + put_page(sg_page(&cmd->tvc_sgl[i])); + kfree(cmd->tvc_sgl); + cmd->tvc_sgl = NULL; + cmd->tvc_sgl_count = 0; return ret; } @@ -822,15 +831,15 @@ static int vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *tv_cmd, static void tcm_vhost_submission_work(struct work_struct *work) { - struct tcm_vhost_cmd *tv_cmd = + struct tcm_vhost_cmd *cmd = container_of(work, struct tcm_vhost_cmd, work); struct tcm_vhost_nexus *tv_nexus; - struct se_cmd *se_cmd = &tv_cmd->tvc_se_cmd; + struct se_cmd *se_cmd = &cmd->tvc_se_cmd; struct scatterlist *sg_ptr, *sg_bidi_ptr = NULL; int rc, sg_no_bidi = 0; - if (tv_cmd->tvc_sgl_count) { - sg_ptr = tv_cmd->tvc_sgl; + if (cmd->tvc_sgl_count) { + sg_ptr = cmd->tvc_sgl; /* FIXME: Fix BIDI operation in tcm_vhost_submission_work() */ #if 0 if (se_cmd->se_cmd_flags & SCF_BIDI) { @@ -841,13 +850,13 @@ static void tcm_vhost_submission_work(struct work_struct *work) } else { sg_ptr = NULL; } - tv_nexus = tv_cmd->tvc_nexus; + tv_nexus = cmd->tvc_nexus; rc = target_submit_cmd_map_sgls(se_cmd, tv_nexus->tvn_se_sess, - tv_cmd->tvc_cdb, &tv_cmd->tvc_sense_buf[0], - tv_cmd->tvc_lun, tv_cmd->tvc_exp_data_len, - tv_cmd->tvc_task_attr, tv_cmd->tvc_data_direction, - 0, sg_ptr, tv_cmd->tvc_sgl_count, + cmd->tvc_cdb, &cmd->tvc_sense_buf[0], + cmd->tvc_lun, cmd->tvc_exp_data_len, + cmd->tvc_task_attr, cmd->tvc_data_direction, + 0, sg_ptr, cmd->tvc_sgl_count, sg_bidi_ptr, sg_no_bidi); if (rc < 0) { transport_send_check_condition_and_sense(se_cmd, @@ -856,8 +865,10 @@ static void tcm_vhost_submission_work(struct work_struct *work) } } -static void vhost_scsi_send_bad_target(struct vhost_scsi *vs, - struct vhost_virtqueue *vq, int head, unsigned out) +static void +vhost_scsi_send_bad_target(struct vhost_scsi *vs, + struct vhost_virtqueue *vq, + int head, unsigned out) { struct virtio_scsi_cmd_resp __user *resp; struct virtio_scsi_cmd_resp rsp; @@ -873,13 +884,13 @@ static void vhost_scsi_send_bad_target(struct vhost_scsi *vs, pr_err("Faulted on virtio_scsi_cmd_resp\n"); } -static void vhost_scsi_handle_vq(struct vhost_scsi *vs, - struct vhost_virtqueue *vq) +static void +vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq) { struct tcm_vhost_tpg **vs_tpg; struct virtio_scsi_cmd_req v_req; - struct tcm_vhost_tpg *tv_tpg; - struct tcm_vhost_cmd *tv_cmd; + struct tcm_vhost_tpg *tpg; + struct tcm_vhost_cmd *cmd; u32 exp_data_len, data_first, data_num, data_direction; unsigned out, in, i; int head, ret; @@ -964,10 +975,10 @@ static void vhost_scsi_handle_vq(struct vhost_scsi *vs, /* Extract the tpgt */ target = v_req.lun[1]; - tv_tpg = ACCESS_ONCE(vs_tpg[target]); + tpg = ACCESS_ONCE(vs_tpg[target]); /* Target does not exist, fail the request */ - if (unlikely(!tv_tpg)) { + if (unlikely(!tpg)) { vhost_scsi_send_bad_target(vs, vq, head, out); continue; } @@ -976,46 +987,46 @@ static void vhost_scsi_handle_vq(struct vhost_scsi *vs, for (i = 0; i < data_num; i++) exp_data_len += vq->iov[data_first + i].iov_len; - tv_cmd = vhost_scsi_allocate_cmd(vq, tv_tpg, &v_req, + cmd = vhost_scsi_allocate_cmd(vq, tpg, &v_req, exp_data_len, data_direction); - if (IS_ERR(tv_cmd)) { + if (IS_ERR(cmd)) { vq_err(vq, "vhost_scsi_allocate_cmd failed %ld\n", - PTR_ERR(tv_cmd)); + PTR_ERR(cmd)); goto err_cmd; } pr_debug("Allocated tv_cmd: %p exp_data_len: %d, data_direction" - ": %d\n", tv_cmd, exp_data_len, data_direction); + ": %d\n", cmd, exp_data_len, data_direction); - tv_cmd->tvc_vhost = vs; - tv_cmd->tvc_vq = vq; - tv_cmd->tvc_resp = vq->iov[out].iov_base; + cmd->tvc_vhost = vs; + cmd->tvc_vq = vq; + cmd->tvc_resp = vq->iov[out].iov_base; /* - * Copy in the recieved CDB descriptor into tv_cmd->tvc_cdb + * Copy in the recieved CDB descriptor into cmd->tvc_cdb * that will be used by tcm_vhost_new_cmd_map() and down into * target_setup_cmd_from_cdb() */ - memcpy(tv_cmd->tvc_cdb, v_req.cdb, TCM_VHOST_MAX_CDB_SIZE); + memcpy(cmd->tvc_cdb, v_req.cdb, TCM_VHOST_MAX_CDB_SIZE); /* * Check that the recieved CDB size does not exceeded our * hardcoded max for tcm_vhost */ /* TODO what if cdb was too small for varlen cdb header? */ - if (unlikely(scsi_command_size(tv_cmd->tvc_cdb) > + if (unlikely(scsi_command_size(cmd->tvc_cdb) > TCM_VHOST_MAX_CDB_SIZE)) { vq_err(vq, "Received SCSI CDB with command_size: %d that" " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", - scsi_command_size(tv_cmd->tvc_cdb), + scsi_command_size(cmd->tvc_cdb), TCM_VHOST_MAX_CDB_SIZE); goto err_free; } - tv_cmd->tvc_lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF; + cmd->tvc_lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF; pr_debug("vhost_scsi got command opcode: %#02x, lun: %d\n", - tv_cmd->tvc_cdb[0], tv_cmd->tvc_lun); + cmd->tvc_cdb[0], cmd->tvc_lun); if (data_direction != DMA_NONE) { - ret = vhost_scsi_map_iov_to_sgl(tv_cmd, + ret = vhost_scsi_map_iov_to_sgl(cmd, &vq->iov[data_first], data_num, data_direction == DMA_TO_DEVICE); if (unlikely(ret)) { @@ -1029,22 +1040,22 @@ static void vhost_scsi_handle_vq(struct vhost_scsi *vs, * complete the virtio-scsi request in TCM callback context via * tcm_vhost_queue_data_in() and tcm_vhost_queue_status() */ - tv_cmd->tvc_vq_desc = head; + cmd->tvc_vq_desc = head; /* * Dispatch tv_cmd descriptor for cmwq execution in process * context provided by tcm_vhost_workqueue. This also ensures * tv_cmd is executed on the same kworker CPU as this vhost * thread to gain positive L2 cache locality effects.. */ - INIT_WORK(&tv_cmd->work, tcm_vhost_submission_work); - queue_work(tcm_vhost_workqueue, &tv_cmd->work); + INIT_WORK(&cmd->work, tcm_vhost_submission_work); + queue_work(tcm_vhost_workqueue, &cmd->work); } mutex_unlock(&vq->mutex); return; err_free: - vhost_scsi_free_cmd(tv_cmd); + vhost_scsi_free_cmd(cmd); err_cmd: vhost_scsi_send_bad_target(vs, vq, head, out); mutex_unlock(&vq->mutex); @@ -1055,8 +1066,12 @@ static void vhost_scsi_ctl_handle_kick(struct vhost_work *work) pr_debug("%s: The handling func for control queue.\n", __func__); } -static void tcm_vhost_send_evt(struct vhost_scsi *vs, struct tcm_vhost_tpg *tpg, - struct se_lun *lun, u32 event, u32 reason) +static void +tcm_vhost_send_evt(struct vhost_scsi *vs, + struct tcm_vhost_tpg *tpg, + struct se_lun *lun, + u32 event, + u32 reason) { struct tcm_vhost_evt *evt; @@ -1146,12 +1161,12 @@ static void vhost_scsi_flush(struct vhost_scsi *vs) * The lock nesting rule is: * tcm_vhost_mutex -> vs->dev.mutex -> tpg->tv_tpg_mutex -> vq->mutex */ -static int vhost_scsi_set_endpoint( - struct vhost_scsi *vs, - struct vhost_scsi_target *t) +static int +vhost_scsi_set_endpoint(struct vhost_scsi *vs, + struct vhost_scsi_target *t) { struct tcm_vhost_tport *tv_tport; - struct tcm_vhost_tpg *tv_tpg; + struct tcm_vhost_tpg *tpg; struct tcm_vhost_tpg **vs_tpg; struct vhost_virtqueue *vq; int index, ret, i, len; @@ -1178,32 +1193,32 @@ static int vhost_scsi_set_endpoint( if (vs->vs_tpg) memcpy(vs_tpg, vs->vs_tpg, len); - list_for_each_entry(tv_tpg, &tcm_vhost_list, tv_tpg_list) { - mutex_lock(&tv_tpg->tv_tpg_mutex); - if (!tv_tpg->tpg_nexus) { - mutex_unlock(&tv_tpg->tv_tpg_mutex); + list_for_each_entry(tpg, &tcm_vhost_list, tv_tpg_list) { + mutex_lock(&tpg->tv_tpg_mutex); + if (!tpg->tpg_nexus) { + mutex_unlock(&tpg->tv_tpg_mutex); continue; } - if (tv_tpg->tv_tpg_vhost_count != 0) { - mutex_unlock(&tv_tpg->tv_tpg_mutex); + if (tpg->tv_tpg_vhost_count != 0) { + mutex_unlock(&tpg->tv_tpg_mutex); continue; } - tv_tport = tv_tpg->tport; + tv_tport = tpg->tport; if (!strcmp(tv_tport->tport_name, t->vhost_wwpn)) { - if (vs->vs_tpg && vs->vs_tpg[tv_tpg->tport_tpgt]) { + if (vs->vs_tpg && vs->vs_tpg[tpg->tport_tpgt]) { kfree(vs_tpg); - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); ret = -EEXIST; goto out; } - tv_tpg->tv_tpg_vhost_count++; - tv_tpg->vhost_scsi = vs; - vs_tpg[tv_tpg->tport_tpgt] = tv_tpg; + tpg->tv_tpg_vhost_count++; + tpg->vhost_scsi = vs; + vs_tpg[tpg->tport_tpgt] = tpg; smp_mb__after_atomic_inc(); match = true; } - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); } if (match) { @@ -1236,12 +1251,12 @@ out: return ret; } -static int vhost_scsi_clear_endpoint( - struct vhost_scsi *vs, - struct vhost_scsi_target *t) +static int +vhost_scsi_clear_endpoint(struct vhost_scsi *vs, + struct vhost_scsi_target *t) { struct tcm_vhost_tport *tv_tport; - struct tcm_vhost_tpg *tv_tpg; + struct tcm_vhost_tpg *tpg; struct vhost_virtqueue *vq; bool match = false; int index, ret, i; @@ -1264,30 +1279,30 @@ static int vhost_scsi_clear_endpoint( for (i = 0; i < VHOST_SCSI_MAX_TARGET; i++) { target = i; - tv_tpg = vs->vs_tpg[target]; - if (!tv_tpg) + tpg = vs->vs_tpg[target]; + if (!tpg) continue; - mutex_lock(&tv_tpg->tv_tpg_mutex); - tv_tport = tv_tpg->tport; + mutex_lock(&tpg->tv_tpg_mutex); + tv_tport = tpg->tport; if (!tv_tport) { ret = -ENODEV; goto err_tpg; } if (strcmp(tv_tport->tport_name, t->vhost_wwpn)) { - pr_warn("tv_tport->tport_name: %s, tv_tpg->tport_tpgt: %hu" + pr_warn("tv_tport->tport_name: %s, tpg->tport_tpgt: %hu" " does not match t->vhost_wwpn: %s, t->vhost_tpgt: %hu\n", - tv_tport->tport_name, tv_tpg->tport_tpgt, + tv_tport->tport_name, tpg->tport_tpgt, t->vhost_wwpn, t->vhost_tpgt); ret = -EINVAL; goto err_tpg; } - tv_tpg->tv_tpg_vhost_count--; - tv_tpg->vhost_scsi = NULL; + tpg->tv_tpg_vhost_count--; + tpg->vhost_scsi = NULL; vs->vs_tpg[target] = NULL; match = true; - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); } if (match) { for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) { @@ -1311,7 +1326,7 @@ static int vhost_scsi_clear_endpoint( return 0; err_tpg: - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); err_dev: mutex_unlock(&vs->dev.mutex); mutex_unlock(&tcm_vhost_mutex); @@ -1338,68 +1353,70 @@ static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features) static int vhost_scsi_open(struct inode *inode, struct file *f) { - struct vhost_scsi *s; + struct vhost_scsi *vs; struct vhost_virtqueue **vqs; int r, i; - s = kzalloc(sizeof(*s), GFP_KERNEL); - if (!s) + vs = kzalloc(sizeof(*vs), GFP_KERNEL); + if (!vs) return -ENOMEM; vqs = kmalloc(VHOST_SCSI_MAX_VQ * sizeof(*vqs), GFP_KERNEL); if (!vqs) { - kfree(s); + kfree(vs); return -ENOMEM; } - vhost_work_init(&s->vs_completion_work, vhost_scsi_complete_cmd_work); - vhost_work_init(&s->vs_event_work, tcm_vhost_evt_work); + vhost_work_init(&vs->vs_completion_work, vhost_scsi_complete_cmd_work); + vhost_work_init(&vs->vs_event_work, tcm_vhost_evt_work); - s->vs_events_nr = 0; - s->vs_events_missed = false; + vs->vs_events_nr = 0; + vs->vs_events_missed = false; - vqs[VHOST_SCSI_VQ_CTL] = &s->vqs[VHOST_SCSI_VQ_CTL].vq; - vqs[VHOST_SCSI_VQ_EVT] = &s->vqs[VHOST_SCSI_VQ_EVT].vq; - s->vqs[VHOST_SCSI_VQ_CTL].vq.handle_kick = vhost_scsi_ctl_handle_kick; - s->vqs[VHOST_SCSI_VQ_EVT].vq.handle_kick = vhost_scsi_evt_handle_kick; + vqs[VHOST_SCSI_VQ_CTL] = &vs->vqs[VHOST_SCSI_VQ_CTL].vq; + vqs[VHOST_SCSI_VQ_EVT] = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; + vs->vqs[VHOST_SCSI_VQ_CTL].vq.handle_kick = vhost_scsi_ctl_handle_kick; + vs->vqs[VHOST_SCSI_VQ_EVT].vq.handle_kick = vhost_scsi_evt_handle_kick; for (i = VHOST_SCSI_VQ_IO; i < VHOST_SCSI_MAX_VQ; i++) { - vqs[i] = &s->vqs[i].vq; - s->vqs[i].vq.handle_kick = vhost_scsi_handle_kick; + vqs[i] = &vs->vqs[i].vq; + vs->vqs[i].vq.handle_kick = vhost_scsi_handle_kick; } - r = vhost_dev_init(&s->dev, vqs, VHOST_SCSI_MAX_VQ); + r = vhost_dev_init(&vs->dev, vqs, VHOST_SCSI_MAX_VQ); - tcm_vhost_init_inflight(s, NULL); + tcm_vhost_init_inflight(vs, NULL); if (r < 0) { kfree(vqs); - kfree(s); + kfree(vs); return r; } - f->private_data = s; + f->private_data = vs; return 0; } static int vhost_scsi_release(struct inode *inode, struct file *f) { - struct vhost_scsi *s = f->private_data; + struct vhost_scsi *vs = f->private_data; struct vhost_scsi_target t; - mutex_lock(&s->dev.mutex); - memcpy(t.vhost_wwpn, s->vs_vhost_wwpn, sizeof(t.vhost_wwpn)); - mutex_unlock(&s->dev.mutex); - vhost_scsi_clear_endpoint(s, &t); - vhost_dev_stop(&s->dev); - vhost_dev_cleanup(&s->dev, false); + mutex_lock(&vs->dev.mutex); + memcpy(t.vhost_wwpn, vs->vs_vhost_wwpn, sizeof(t.vhost_wwpn)); + mutex_unlock(&vs->dev.mutex); + vhost_scsi_clear_endpoint(vs, &t); + vhost_dev_stop(&vs->dev); + vhost_dev_cleanup(&vs->dev, false); /* Jobs can re-queue themselves in evt kick handler. Do extra flush. */ - vhost_scsi_flush(s); - kfree(s->dev.vqs); - kfree(s); + vhost_scsi_flush(vs); + kfree(vs->dev.vqs); + kfree(vs); return 0; } -static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl, - unsigned long arg) +static long +vhost_scsi_ioctl(struct file *f, + unsigned int ioctl, + unsigned long arg) { struct vhost_scsi *vs = f->private_data; struct vhost_scsi_target backend; @@ -1515,8 +1532,9 @@ static char *tcm_vhost_dump_proto_id(struct tcm_vhost_tport *tport) return "Unknown"; } -static void tcm_vhost_do_plug(struct tcm_vhost_tpg *tpg, - struct se_lun *lun, bool plug) +static void +tcm_vhost_do_plug(struct tcm_vhost_tpg *tpg, + struct se_lun *lun, bool plug) { struct vhost_scsi *vs = tpg->vhost_scsi; @@ -1556,18 +1574,18 @@ static void tcm_vhost_hotunplug(struct tcm_vhost_tpg *tpg, struct se_lun *lun) } static int tcm_vhost_port_link(struct se_portal_group *se_tpg, - struct se_lun *lun) + struct se_lun *lun) { - struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, + struct tcm_vhost_tpg *tpg = container_of(se_tpg, struct tcm_vhost_tpg, se_tpg); mutex_lock(&tcm_vhost_mutex); - mutex_lock(&tv_tpg->tv_tpg_mutex); - tv_tpg->tv_tpg_port_count++; - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_lock(&tpg->tv_tpg_mutex); + tpg->tv_tpg_port_count++; + mutex_unlock(&tpg->tv_tpg_mutex); - tcm_vhost_hotplug(tv_tpg, lun); + tcm_vhost_hotplug(tpg, lun); mutex_unlock(&tcm_vhost_mutex); @@ -1575,26 +1593,26 @@ static int tcm_vhost_port_link(struct se_portal_group *se_tpg, } static void tcm_vhost_port_unlink(struct se_portal_group *se_tpg, - struct se_lun *lun) + struct se_lun *lun) { - struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, + struct tcm_vhost_tpg *tpg = container_of(se_tpg, struct tcm_vhost_tpg, se_tpg); mutex_lock(&tcm_vhost_mutex); - mutex_lock(&tv_tpg->tv_tpg_mutex); - tv_tpg->tv_tpg_port_count--; - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_lock(&tpg->tv_tpg_mutex); + tpg->tv_tpg_port_count--; + mutex_unlock(&tpg->tv_tpg_mutex); - tcm_vhost_hotunplug(tv_tpg, lun); + tcm_vhost_hotunplug(tpg, lun); mutex_unlock(&tcm_vhost_mutex); } -static struct se_node_acl *tcm_vhost_make_nodeacl( - struct se_portal_group *se_tpg, - struct config_group *group, - const char *name) +static struct se_node_acl * +tcm_vhost_make_nodeacl(struct se_portal_group *se_tpg, + struct config_group *group, + const char *name) { struct se_node_acl *se_nacl, *se_nacl_new; struct tcm_vhost_nacl *nacl; @@ -1635,23 +1653,23 @@ static void tcm_vhost_drop_nodeacl(struct se_node_acl *se_acl) kfree(nacl); } -static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tv_tpg, - const char *name) +static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tpg, + const char *name) { struct se_portal_group *se_tpg; struct tcm_vhost_nexus *tv_nexus; - mutex_lock(&tv_tpg->tv_tpg_mutex); - if (tv_tpg->tpg_nexus) { - mutex_unlock(&tv_tpg->tv_tpg_mutex); - pr_debug("tv_tpg->tpg_nexus already exists\n"); + mutex_lock(&tpg->tv_tpg_mutex); + if (tpg->tpg_nexus) { + mutex_unlock(&tpg->tv_tpg_mutex); + pr_debug("tpg->tpg_nexus already exists\n"); return -EEXIST; } - se_tpg = &tv_tpg->se_tpg; + se_tpg = &tpg->se_tpg; tv_nexus = kzalloc(sizeof(struct tcm_vhost_nexus), GFP_KERNEL); if (!tv_nexus) { - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); pr_err("Unable to allocate struct tcm_vhost_nexus\n"); return -ENOMEM; } @@ -1660,7 +1678,7 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tv_tpg, */ tv_nexus->tvn_se_sess = transport_init_session(); if (IS_ERR(tv_nexus->tvn_se_sess)) { - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); kfree(tv_nexus); return -ENOMEM; } @@ -1672,7 +1690,7 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tv_tpg, tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl( se_tpg, (unsigned char *)name); if (!tv_nexus->tvn_se_sess->se_node_acl) { - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); pr_debug("core_tpg_check_initiator_node_acl() failed" " for %s\n", name); transport_free_session(tv_nexus->tvn_se_sess); @@ -1685,9 +1703,9 @@ static int tcm_vhost_make_nexus(struct tcm_vhost_tpg *tv_tpg, */ __transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl, tv_nexus->tvn_se_sess, tv_nexus); - tv_tpg->tpg_nexus = tv_nexus; + tpg->tpg_nexus = tv_nexus; - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); return 0; } @@ -1740,40 +1758,40 @@ static int tcm_vhost_drop_nexus(struct tcm_vhost_tpg *tpg) } static ssize_t tcm_vhost_tpg_show_nexus(struct se_portal_group *se_tpg, - char *page) + char *page) { - struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, + struct tcm_vhost_tpg *tpg = container_of(se_tpg, struct tcm_vhost_tpg, se_tpg); struct tcm_vhost_nexus *tv_nexus; ssize_t ret; - mutex_lock(&tv_tpg->tv_tpg_mutex); - tv_nexus = tv_tpg->tpg_nexus; + mutex_lock(&tpg->tv_tpg_mutex); + tv_nexus = tpg->tpg_nexus; if (!tv_nexus) { - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); return -ENODEV; } ret = snprintf(page, PAGE_SIZE, "%s\n", tv_nexus->tvn_se_sess->se_node_acl->initiatorname); - mutex_unlock(&tv_tpg->tv_tpg_mutex); + mutex_unlock(&tpg->tv_tpg_mutex); return ret; } static ssize_t tcm_vhost_tpg_store_nexus(struct se_portal_group *se_tpg, - const char *page, - size_t count) + const char *page, + size_t count) { - struct tcm_vhost_tpg *tv_tpg = container_of(se_tpg, + struct tcm_vhost_tpg *tpg = container_of(se_tpg, struct tcm_vhost_tpg, se_tpg); - struct tcm_vhost_tport *tport_wwn = tv_tpg->tport; + struct tcm_vhost_tport *tport_wwn = tpg->tport; unsigned char i_port[TCM_VHOST_NAMELEN], *ptr, *port_ptr; int ret; /* * Shutdown the active I_T nexus if 'NULL' is passed.. */ if (!strncmp(page, "NULL", 4)) { - ret = tcm_vhost_drop_nexus(tv_tpg); + ret = tcm_vhost_drop_nexus(tpg); return (!ret) ? count : ret; } /* @@ -1831,7 +1849,7 @@ check_newline: if (i_port[strlen(i_port)-1] == '\n') i_port[strlen(i_port)-1] = '\0'; - ret = tcm_vhost_make_nexus(tv_tpg, port_ptr); + ret = tcm_vhost_make_nexus(tpg, port_ptr); if (ret < 0) return ret; @@ -1845,9 +1863,10 @@ static struct configfs_attribute *tcm_vhost_tpg_attrs[] = { NULL, }; -static struct se_portal_group *tcm_vhost_make_tpg(struct se_wwn *wwn, - struct config_group *group, - const char *name) +static struct se_portal_group * +tcm_vhost_make_tpg(struct se_wwn *wwn, + struct config_group *group, + const char *name) { struct tcm_vhost_tport *tport = container_of(wwn, struct tcm_vhost_tport, tport_wwn); @@ -1903,9 +1922,10 @@ static void tcm_vhost_drop_tpg(struct se_portal_group *se_tpg) kfree(tpg); } -static struct se_wwn *tcm_vhost_make_tport(struct target_fabric_configfs *tf, - struct config_group *group, - const char *name) +static struct se_wwn * +tcm_vhost_make_tport(struct target_fabric_configfs *tf, + struct config_group *group, + const char *name) { struct tcm_vhost_tport *tport; char *ptr; @@ -1975,9 +1995,9 @@ static void tcm_vhost_drop_tport(struct se_wwn *wwn) kfree(tport); } -static ssize_t tcm_vhost_wwn_show_attr_version( - struct target_fabric_configfs *tf, - char *page) +static ssize_t +tcm_vhost_wwn_show_attr_version(struct target_fabric_configfs *tf, + char *page) { return sprintf(page, "TCM_VHOST fabric module %s on %s/%s" "on "UTS_RELEASE"\n", TCM_VHOST_VERSION, utsname()->sysname, diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c index 1ee45bc85f67..a73ea217f24d 100644 --- a/drivers/vhost/test.c +++ b/drivers/vhost/test.c @@ -18,7 +18,7 @@ #include <linux/slab.h> #include "test.h" -#include "vhost.c" +#include "vhost.h" /* Max number of bytes transferred before requeueing the job. * Using this limit prevents one virtqueue from starving others. */ @@ -38,17 +38,19 @@ struct vhost_test { * read-size critical section for our kind of RCU. */ static void handle_vq(struct vhost_test *n) { - struct vhost_virtqueue *vq = &n->dev.vqs[VHOST_TEST_VQ]; + struct vhost_virtqueue *vq = &n->vqs[VHOST_TEST_VQ]; unsigned out, in; int head; size_t len, total_len = 0; void *private; - private = rcu_dereference_check(vq->private_data, 1); - if (!private) + mutex_lock(&vq->mutex); + private = vq->private_data; + if (!private) { + mutex_unlock(&vq->mutex); return; + } - mutex_lock(&vq->mutex); vhost_disable_notify(&n->dev, vq); for (;;) { @@ -102,15 +104,23 @@ static int vhost_test_open(struct inode *inode, struct file *f) { struct vhost_test *n = kmalloc(sizeof *n, GFP_KERNEL); struct vhost_dev *dev; + struct vhost_virtqueue **vqs; int r; if (!n) return -ENOMEM; + vqs = kmalloc(VHOST_TEST_VQ_MAX * sizeof(*vqs), GFP_KERNEL); + if (!vqs) { + kfree(n); + return -ENOMEM; + } dev = &n->dev; + vqs[VHOST_TEST_VQ] = &n->vqs[VHOST_TEST_VQ]; n->vqs[VHOST_TEST_VQ].handle_kick = handle_vq_kick; - r = vhost_dev_init(dev, n->vqs, VHOST_TEST_VQ_MAX); + r = vhost_dev_init(dev, vqs, VHOST_TEST_VQ_MAX); if (r < 0) { + kfree(vqs); kfree(n); return r; } @@ -126,9 +136,8 @@ static void *vhost_test_stop_vq(struct vhost_test *n, void *private; mutex_lock(&vq->mutex); - private = rcu_dereference_protected(vq->private_data, - lockdep_is_held(&vq->mutex)); - rcu_assign_pointer(vq->private_data, NULL); + private = vq->private_data; + vq->private_data = NULL; mutex_unlock(&vq->mutex); return private; } @@ -140,7 +149,7 @@ static void vhost_test_stop(struct vhost_test *n, void **privatep) static void vhost_test_flush_vq(struct vhost_test *n, int index) { - vhost_poll_flush(&n->dev.vqs[index].poll); + vhost_poll_flush(&n->vqs[index].poll); } static void vhost_test_flush(struct vhost_test *n) @@ -268,14 +277,14 @@ static long vhost_test_ioctl(struct file *f, unsigned int ioctl, return -EFAULT; return vhost_test_run(n, test); case VHOST_GET_FEATURES: - features = VHOST_NET_FEATURES; + features = VHOST_FEATURES; if (copy_to_user(featurep, &features, sizeof features)) return -EFAULT; return 0; case VHOST_SET_FEATURES: if (copy_from_user(&features, featurep, sizeof features)) return -EFAULT; - if (features & ~VHOST_NET_FEATURES) + if (features & ~VHOST_FEATURES) return -EOPNOTSUPP; return vhost_test_set_features(n, features); case VHOST_RESET_OWNER: diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 60aa5ad09a2f..e58cf0001cee 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -25,6 +25,7 @@ #include <linux/slab.h> #include <linux/kthread.h> #include <linux/cgroup.h> +#include <linux/module.h> #include "vhost.h" @@ -66,6 +67,7 @@ void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn) work->flushing = 0; work->queue_seq = work->done_seq = 0; } +EXPORT_SYMBOL_GPL(vhost_work_init); /* Init poll structure */ void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn, @@ -79,6 +81,7 @@ void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn, vhost_work_init(&poll->work, fn); } +EXPORT_SYMBOL_GPL(vhost_poll_init); /* Start polling a file. We add ourselves to file's wait queue. The caller must * keep a reference to a file until after vhost_poll_stop is called. */ @@ -101,6 +104,7 @@ int vhost_poll_start(struct vhost_poll *poll, struct file *file) return ret; } +EXPORT_SYMBOL_GPL(vhost_poll_start); /* Stop polling a file. After this function returns, it becomes safe to drop the * file reference. You must also flush afterwards. */ @@ -111,6 +115,7 @@ void vhost_poll_stop(struct vhost_poll *poll) poll->wqh = NULL; } } +EXPORT_SYMBOL_GPL(vhost_poll_stop); static bool vhost_work_seq_done(struct vhost_dev *dev, struct vhost_work *work, unsigned seq) @@ -123,7 +128,7 @@ static bool vhost_work_seq_done(struct vhost_dev *dev, struct vhost_work *work, return left <= 0; } -static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work) +void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work) { unsigned seq; int flushing; @@ -138,6 +143,7 @@ static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work) spin_unlock_irq(&dev->work_lock); BUG_ON(flushing < 0); } +EXPORT_SYMBOL_GPL(vhost_work_flush); /* Flush any work that has been scheduled. When calling this, don't hold any * locks that are also used by the callback. */ @@ -145,6 +151,7 @@ void vhost_poll_flush(struct vhost_poll *poll) { vhost_work_flush(poll->dev, &poll->work); } +EXPORT_SYMBOL_GPL(vhost_poll_flush); void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work) { @@ -158,11 +165,13 @@ void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work) } spin_unlock_irqrestore(&dev->work_lock, flags); } +EXPORT_SYMBOL_GPL(vhost_work_queue); void vhost_poll_queue(struct vhost_poll *poll) { vhost_work_queue(poll->dev, &poll->work); } +EXPORT_SYMBOL_GPL(vhost_poll_queue); static void vhost_vq_reset(struct vhost_dev *dev, struct vhost_virtqueue *vq) @@ -251,17 +260,16 @@ static void vhost_vq_free_iovecs(struct vhost_virtqueue *vq) /* Helper to allocate iovec buffers for all vqs. */ static long vhost_dev_alloc_iovecs(struct vhost_dev *dev) { + struct vhost_virtqueue *vq; int i; for (i = 0; i < dev->nvqs; ++i) { - dev->vqs[i]->indirect = kmalloc(sizeof *dev->vqs[i]->indirect * - UIO_MAXIOV, GFP_KERNEL); - dev->vqs[i]->log = kmalloc(sizeof *dev->vqs[i]->log * UIO_MAXIOV, - GFP_KERNEL); - dev->vqs[i]->heads = kmalloc(sizeof *dev->vqs[i]->heads * - UIO_MAXIOV, GFP_KERNEL); - if (!dev->vqs[i]->indirect || !dev->vqs[i]->log || - !dev->vqs[i]->heads) + vq = dev->vqs[i]; + vq->indirect = kmalloc(sizeof *vq->indirect * UIO_MAXIOV, + GFP_KERNEL); + vq->log = kmalloc(sizeof *vq->log * UIO_MAXIOV, GFP_KERNEL); + vq->heads = kmalloc(sizeof *vq->heads * UIO_MAXIOV, GFP_KERNEL); + if (!vq->indirect || !vq->log || !vq->heads) goto err_nomem; } return 0; @@ -283,6 +291,7 @@ static void vhost_dev_free_iovecs(struct vhost_dev *dev) long vhost_dev_init(struct vhost_dev *dev, struct vhost_virtqueue **vqs, int nvqs) { + struct vhost_virtqueue *vq; int i; dev->vqs = vqs; @@ -297,19 +306,21 @@ long vhost_dev_init(struct vhost_dev *dev, dev->worker = NULL; for (i = 0; i < dev->nvqs; ++i) { - dev->vqs[i]->log = NULL; - dev->vqs[i]->indirect = NULL; - dev->vqs[i]->heads = NULL; - dev->vqs[i]->dev = dev; - mutex_init(&dev->vqs[i]->mutex); - vhost_vq_reset(dev, dev->vqs[i]); - if (dev->vqs[i]->handle_kick) - vhost_poll_init(&dev->vqs[i]->poll, - dev->vqs[i]->handle_kick, POLLIN, dev); + vq = dev->vqs[i]; + vq->log = NULL; + vq->indirect = NULL; + vq->heads = NULL; + vq->dev = dev; + mutex_init(&vq->mutex); + vhost_vq_reset(dev, vq); + if (vq->handle_kick) + vhost_poll_init(&vq->poll, vq->handle_kick, + POLLIN, dev); } return 0; } +EXPORT_SYMBOL_GPL(vhost_dev_init); /* Caller should have device mutex */ long vhost_dev_check_owner(struct vhost_dev *dev) @@ -317,6 +328,7 @@ long vhost_dev_check_owner(struct vhost_dev *dev) /* Are you the owner? If not, I don't think you mean to do that */ return dev->mm == current->mm ? 0 : -EPERM; } +EXPORT_SYMBOL_GPL(vhost_dev_check_owner); struct vhost_attach_cgroups_struct { struct vhost_work work; @@ -348,6 +360,7 @@ bool vhost_dev_has_owner(struct vhost_dev *dev) { return dev->mm; } +EXPORT_SYMBOL_GPL(vhost_dev_has_owner); /* Caller should have device mutex */ long vhost_dev_set_owner(struct vhost_dev *dev) @@ -391,11 +404,13 @@ err_worker: err_mm: return err; } +EXPORT_SYMBOL_GPL(vhost_dev_set_owner); struct vhost_memory *vhost_dev_reset_owner_prepare(void) { return kmalloc(offsetof(struct vhost_memory, regions), GFP_KERNEL); } +EXPORT_SYMBOL_GPL(vhost_dev_reset_owner_prepare); /* Caller should have device mutex */ void vhost_dev_reset_owner(struct vhost_dev *dev, struct vhost_memory *memory) @@ -406,6 +421,7 @@ void vhost_dev_reset_owner(struct vhost_dev *dev, struct vhost_memory *memory) memory->nregions = 0; RCU_INIT_POINTER(dev->memory, memory); } +EXPORT_SYMBOL_GPL(vhost_dev_reset_owner); void vhost_dev_stop(struct vhost_dev *dev) { @@ -418,6 +434,7 @@ void vhost_dev_stop(struct vhost_dev *dev) } } } +EXPORT_SYMBOL_GPL(vhost_dev_stop); /* Caller should have device mutex if and only if locked is set */ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) @@ -458,6 +475,7 @@ void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) mmput(dev->mm); dev->mm = NULL; } +EXPORT_SYMBOL_GPL(vhost_dev_cleanup); static int log_access_ok(void __user *log_base, u64 addr, unsigned long sz) { @@ -543,6 +561,7 @@ int vhost_log_access_ok(struct vhost_dev *dev) lockdep_is_held(&dev->mutex)); return memory_access_ok(dev, mp, 1); } +EXPORT_SYMBOL_GPL(vhost_log_access_ok); /* Verify access for write logging. */ /* Caller should have vq mutex and device mutex */ @@ -568,6 +587,7 @@ int vhost_vq_access_ok(struct vhost_virtqueue *vq) return vq_access_ok(vq->dev, vq->num, vq->desc, vq->avail, vq->used) && vq_log_access_ok(vq->dev, vq, vq->log_base); } +EXPORT_SYMBOL_GPL(vhost_vq_access_ok); static long vhost_set_memory(struct vhost_dev *d, struct vhost_memory __user *m) { @@ -797,6 +817,7 @@ long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp) vhost_poll_flush(&vq->poll); return r; } +EXPORT_SYMBOL_GPL(vhost_vring_ioctl); /* Caller must have device mutex */ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) @@ -877,6 +898,7 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp) done: return r; } +EXPORT_SYMBOL_GPL(vhost_dev_ioctl); static const struct vhost_memory_region *find_region(struct vhost_memory *mem, __u64 addr, __u32 len) @@ -968,6 +990,7 @@ int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log, BUG(); return 0; } +EXPORT_SYMBOL_GPL(vhost_log_write); static int vhost_update_used_flags(struct vhost_virtqueue *vq) { @@ -1019,6 +1042,7 @@ int vhost_init_used(struct vhost_virtqueue *vq) vq->signalled_used_valid = false; return get_user(vq->last_used_idx, &vq->used->idx); } +EXPORT_SYMBOL_GPL(vhost_init_used); static int translate_desc(struct vhost_dev *dev, u64 addr, u32 len, struct iovec iov[], int iov_size) @@ -1295,12 +1319,14 @@ int vhost_get_vq_desc(struct vhost_dev *dev, struct vhost_virtqueue *vq, BUG_ON(!(vq->used_flags & VRING_USED_F_NO_NOTIFY)); return head; } +EXPORT_SYMBOL_GPL(vhost_get_vq_desc); /* Reverse the effect of vhost_get_vq_desc. Useful for error handling. */ void vhost_discard_vq_desc(struct vhost_virtqueue *vq, int n) { vq->last_avail_idx -= n; } +EXPORT_SYMBOL_GPL(vhost_discard_vq_desc); /* After we've used one of their buffers, we tell them about it. We'll then * want to notify the guest, using eventfd. */ @@ -1349,6 +1375,7 @@ int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len) vq->signalled_used_valid = false; return 0; } +EXPORT_SYMBOL_GPL(vhost_add_used); static int __vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads, @@ -1418,6 +1445,7 @@ int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads, } return r; } +EXPORT_SYMBOL_GPL(vhost_add_used_n); static bool vhost_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) { @@ -1462,6 +1490,7 @@ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) if (vq->call_ctx && vhost_notify(dev, vq)) eventfd_signal(vq->call_ctx, 1); } +EXPORT_SYMBOL_GPL(vhost_signal); /* And here's the combo meal deal. Supersize me! */ void vhost_add_used_and_signal(struct vhost_dev *dev, @@ -1471,6 +1500,7 @@ void vhost_add_used_and_signal(struct vhost_dev *dev, vhost_add_used(vq, head, len); vhost_signal(dev, vq); } +EXPORT_SYMBOL_GPL(vhost_add_used_and_signal); /* multi-buffer version of vhost_add_used_and_signal */ void vhost_add_used_and_signal_n(struct vhost_dev *dev, @@ -1480,6 +1510,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *dev, vhost_add_used_n(vq, heads, count); vhost_signal(dev, vq); } +EXPORT_SYMBOL_GPL(vhost_add_used_and_signal_n); /* OK, now we need to know about added descriptors. */ bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) @@ -1517,6 +1548,7 @@ bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) return avail_idx != vq->avail_idx; } +EXPORT_SYMBOL_GPL(vhost_enable_notify); /* We don't need to be notified again. */ void vhost_disable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) @@ -1533,3 +1565,21 @@ void vhost_disable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) &vq->used->flags, r); } } +EXPORT_SYMBOL_GPL(vhost_disable_notify); + +static int __init vhost_init(void) +{ + return 0; +} + +static void __exit vhost_exit(void) +{ +} + +module_init(vhost_init); +module_exit(vhost_exit); + +MODULE_VERSION("0.0.1"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Michael S. Tsirkin"); +MODULE_DESCRIPTION("Host kernel accelerator for virtio"); diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 64adcf99ff33..42298cd23c73 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -46,6 +46,8 @@ int vhost_poll_start(struct vhost_poll *poll, struct file *file); void vhost_poll_stop(struct vhost_poll *poll); void vhost_poll_flush(struct vhost_poll *poll); void vhost_poll_queue(struct vhost_poll *poll); +void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work); +long vhost_vring_ioctl(struct vhost_dev *d, int ioctl, void __user *argp); struct vhost_log { u64 addr; |