/* * Copyright (c) 2016 Tom Haynes * * The following implements a super-simple flex-file server * where the NFSv4.1 mds is also the ds. And the storage is * the same. I.e., writing to the mds via a NFSv4.1 WRITE * goes to the same location as the NFSv3 WRITE. */ #include #include #include #include "flexfilelayoutxdr.h" #include "pnfs.h" #define NFSDDBG_FACILITY NFSDDBG_PNFS static __be32 nfsd4_ff_proc_layoutget(struct inode *inode, const struct svc_fh *fhp, struct nfsd4_layoutget *args) { struct nfsd4_layout_seg *seg = &args->lg_seg; u32 device_generation = 0; int error; uid_t u; struct pnfs_ff_layout *fl; /* * The super simple flex file server has 1 mirror, 1 data server, * and 1 file handle. So instead of 4 allocs, do 1 for now. * Zero it out for the stateid - don't want junk in there! */ error = -ENOMEM; fl = kzalloc(sizeof(*fl), GFP_KERNEL); if (!fl) goto out_error; args->lg_content = fl; /* * Avoid layout commit, try to force the I/O to the DS, * and for fun, cause all IOMODE_RW layout segments to * effectively be WRITE only. */ fl->flags = FF_FLAGS_NO_LAYOUTCOMMIT | FF_FLAGS_NO_IO_THRU_MDS | FF_FLAGS_NO_READ_IO; /* Do not allow a IOMODE_READ segment to have write pemissions */ if (seg->iomode == IOMODE_READ) { u = from_kuid(&init_user_ns, inode->i_uid) + 1; fl->uid = make_kuid(&init_user_ns, u); } else fl->uid = inode->i_uid; fl->gid = inode->i_gid; error = nfsd4_set_deviceid(&fl->deviceid, fhp, device_generation); if (error) goto out_error; fl->fh.size = fhp->fh_handle.fh_size; memcpy(fl->fh.data, &fhp->fh_handle.fh_base, fl->fh.size); /* Give whole file layout segments */ seg->offset = 0; seg->length = NFS4_MAX_UINT64; dprintk("GET: 0x%llx:0x%llx %d\n", seg->offset, seg->length, seg->iomode); return 0; out_error: seg->length = 0; return nfserrno(error); } static __be32 nfsd4_ff_proc_getdeviceinfo(struct super_block *sb, struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_getdeviceinfo *gdp) { struct pnfs_ff_device_addr *da; u16 port; char addr[INET6_ADDRSTRLEN]; da = kzalloc(sizeof(struct pnfs_ff_device_addr), GFP_KERNEL); if (!da) return nfserrno(-ENOMEM); gdp->gd_device = da; da->version = 3; da->minor_version = 0; da->rsize = svc_max_payload(rqstp); da->wsize = da->rsize; rpc_ntop((struct sockaddr *)&rqstp->rq_daddr, addr, INET6_ADDRSTRLEN); if (rqstp->rq_daddr.ss_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)&rqstp->rq_daddr; port = ntohs(sin->sin_port); snprintf(da->netaddr.netid, FF_NETID_LEN + 1, "tcp"); da->netaddr.netid_len = 3; } else { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&rqstp->rq_daddr; port = ntohs(sin6->sin6_port); snprintf(da->netaddr.netid, FF_NETID_LEN + 1, "tcp6"); da->netaddr.netid_len = 4; } da->netaddr.addr_len = snprintf(da->netaddr.addr, FF_ADDR_LEN + 1, "%s.%hhu.%hhu", addr, port >> 8, port & 0xff); da->tightly_coupled = false; return 0; } const struct nfsd4_layout_ops ff_layout_ops = { .notify_types = NOTIFY_DEVICEID4_DELETE | NOTIFY_DEVICEID4_CHANGE, .disable_recalls = true, .proc_getdeviceinfo = nfsd4_ff_proc_getdeviceinfo, .encode_getdeviceinfo = nfsd4_ff_encode_getdeviceinfo, .proc_layoutget = nfsd4_ff_proc_layoutget, .encode_layoutget = nfsd4_ff_encode_layoutget, }; .c
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /net/wireless/debugfs.c
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'net/wireless/debugfs.c')