~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/nfsd/flexfilelayout.c

Version: ~ [ linux-5.9-rc6 ] ~ [ linux-5.8.10 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.66 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.146 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.198 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.236 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.236 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0
  2 /*
  3  * Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
  4  *
  5  * The following implements a super-simple flex-file server
  6  * where the NFSv4.1 mds is also the ds. And the storage is
  7  * the same. I.e., writing to the mds via a NFSv4.1 WRITE
  8  * goes to the same location as the NFSv3 WRITE.
  9  */
 10 #include <linux/slab.h>
 11 
 12 #include <linux/nfsd/debug.h>
 13 
 14 #include <linux/sunrpc/addr.h>
 15 
 16 #include "flexfilelayoutxdr.h"
 17 #include "pnfs.h"
 18 
 19 #define NFSDDBG_FACILITY        NFSDDBG_PNFS
 20 
 21 static __be32
 22 nfsd4_ff_proc_layoutget(struct inode *inode, const struct svc_fh *fhp,
 23                 struct nfsd4_layoutget *args)
 24 {
 25         struct nfsd4_layout_seg *seg = &args->lg_seg;
 26         u32 device_generation = 0;
 27         int error;
 28         uid_t u;
 29 
 30         struct pnfs_ff_layout *fl;
 31 
 32         /*
 33          * The super simple flex file server has 1 mirror, 1 data server,
 34          * and 1 file handle. So instead of 4 allocs, do 1 for now.
 35          * Zero it out for the stateid - don't want junk in there!
 36          */
 37         error = -ENOMEM;
 38         fl = kzalloc(sizeof(*fl), GFP_KERNEL);
 39         if (!fl)
 40                 goto out_error;
 41         args->lg_content = fl;
 42 
 43         /*
 44          * Avoid layout commit, try to force the I/O to the DS,
 45          * and for fun, cause all IOMODE_RW layout segments to
 46          * effectively be WRITE only.
 47          */
 48         fl->flags = FF_FLAGS_NO_LAYOUTCOMMIT | FF_FLAGS_NO_IO_THRU_MDS |
 49                     FF_FLAGS_NO_READ_IO;
 50 
 51         /* Do not allow a IOMODE_READ segment to have write pemissions */
 52         if (seg->iomode == IOMODE_READ) {
 53                 u = from_kuid(&init_user_ns, inode->i_uid) + 1;
 54                 fl->uid = make_kuid(&init_user_ns, u);
 55         } else
 56                 fl->uid = inode->i_uid;
 57         fl->gid = inode->i_gid;
 58 
 59         error = nfsd4_set_deviceid(&fl->deviceid, fhp, device_generation);
 60         if (error)
 61                 goto out_error;
 62 
 63         fl->fh.size = fhp->fh_handle.fh_size;
 64         memcpy(fl->fh.data, &fhp->fh_handle.fh_base, fl->fh.size);
 65 
 66         /* Give whole file layout segments */
 67         seg->offset = 0;
 68         seg->length = NFS4_MAX_UINT64;
 69 
 70         dprintk("GET: 0x%llx:0x%llx %d\n", seg->offset, seg->length,
 71                 seg->iomode);
 72         return 0;
 73 
 74 out_error:
 75         seg->length = 0;
 76         return nfserrno(error);
 77 }
 78 
 79 static __be32
 80 nfsd4_ff_proc_getdeviceinfo(struct super_block *sb, struct svc_rqst *rqstp,
 81                 struct nfs4_client *clp, struct nfsd4_getdeviceinfo *gdp)
 82 {
 83         struct pnfs_ff_device_addr *da;
 84 
 85         u16 port;
 86         char addr[INET6_ADDRSTRLEN];
 87 
 88         da = kzalloc(sizeof(struct pnfs_ff_device_addr), GFP_KERNEL);
 89         if (!da)
 90                 return nfserrno(-ENOMEM);
 91 
 92         gdp->gd_device = da;
 93 
 94         da->version = 3;
 95         da->minor_version = 0;
 96 
 97         da->rsize = svc_max_payload(rqstp);
 98         da->wsize = da->rsize;
 99 
100         rpc_ntop((struct sockaddr *)&rqstp->rq_daddr,
101                  addr, INET6_ADDRSTRLEN);
102         if (rqstp->rq_daddr.ss_family == AF_INET) {
103                 struct sockaddr_in *sin;
104 
105                 sin = (struct sockaddr_in *)&rqstp->rq_daddr;
106                 port = ntohs(sin->sin_port);
107                 snprintf(da->netaddr.netid, FF_NETID_LEN + 1, "tcp");
108                 da->netaddr.netid_len = 3;
109         } else {
110                 struct sockaddr_in6 *sin6;
111 
112                 sin6 = (struct sockaddr_in6 *)&rqstp->rq_daddr;
113                 port = ntohs(sin6->sin6_port);
114                 snprintf(da->netaddr.netid, FF_NETID_LEN + 1, "tcp6");
115                 da->netaddr.netid_len = 4;
116         }
117 
118         da->netaddr.addr_len =
119                 snprintf(da->netaddr.addr, FF_ADDR_LEN + 1,
120                          "%s.%hhu.%hhu", addr, port >> 8, port & 0xff);
121 
122         da->tightly_coupled = false;
123 
124         return 0;
125 }
126 
127 const struct nfsd4_layout_ops ff_layout_ops = {
128         .notify_types           =
129                         NOTIFY_DEVICEID4_DELETE | NOTIFY_DEVICEID4_CHANGE,
130         .disable_recalls        = true,
131         .proc_getdeviceinfo     = nfsd4_ff_proc_getdeviceinfo,
132         .encode_getdeviceinfo   = nfsd4_ff_encode_getdeviceinfo,
133         .proc_layoutget         = nfsd4_ff_proc_layoutget,
134         .encode_layoutget       = nfsd4_ff_encode_layoutget,
135 };
136 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp