/* * 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, }; d8c477f21453681f5995c'>phy/phy-generic.c
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authorLiam R. Howlett <Liam.Howlett@Oracle.com>2017-01-17 10:59:03 -0500
committerDavid S. Miller <davem@davemloft.net>2017-01-30 14:27:54 -0800
commit047487241ff59374fded8c477f21453681f5995c (patch)
tree1c2616bd373ce5ea28aac2a53e32f5b5834901ce /drivers/usb/phy/phy-generic.c
parent7a7dc961a28b965a0d0303c2e989df17b411708b (diff)
sparc64: Handle PIO & MEM non-resumable errors.
User processes trying to access an invalid memory address via PIO will receive a SIGBUS signal instead of causing a panic. Memory errors will receive a SIGKILL since a SIGBUS may result in a coredump which may attempt to repeat the faulting access. Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/usb/phy/phy-generic.c')