flexfilelayoutxdr.c 2.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (c) 2016 Tom Haynes <loghyr@primarydata.com>
  4. */
  5. #include <linux/sunrpc/svc.h>
  6. #include <linux/nfs4.h>
  7. #include "nfsd.h"
  8. #include "flexfilelayoutxdr.h"
  9. #define NFSDDBG_FACILITY NFSDDBG_PNFS
  10. struct ff_idmap {
  11. char buf[11];
  12. int len;
  13. };
  14. __be32
  15. nfsd4_ff_encode_layoutget(struct xdr_stream *xdr,
  16. struct nfsd4_layoutget *lgp)
  17. {
  18. struct pnfs_ff_layout *fl = lgp->lg_content;
  19. int len, mirror_len, ds_len, fh_len;
  20. __be32 *p;
  21. /*
  22. * Unlike nfsd4_encode_user, we know these will
  23. * always be stringified.
  24. */
  25. struct ff_idmap uid;
  26. struct ff_idmap gid;
  27. fh_len = 4 + fl->fh.size;
  28. uid.len = sprintf(uid.buf, "%u", from_kuid(&init_user_ns, fl->uid));
  29. gid.len = sprintf(gid.buf, "%u", from_kgid(&init_user_ns, fl->gid));
  30. /* 8 + len for recording the length, name, and padding */
  31. ds_len = 20 + sizeof(stateid_opaque_t) + 4 + fh_len +
  32. 8 + uid.len + 8 + gid.len;
  33. mirror_len = 4 + ds_len;
  34. /* The layout segment */
  35. len = 20 + mirror_len;
  36. p = xdr_reserve_space(xdr, sizeof(__be32) + len);
  37. if (!p)
  38. return nfserr_toosmall;
  39. *p++ = cpu_to_be32(len);
  40. p = xdr_encode_hyper(p, 0); /* stripe unit of 1 */
  41. *p++ = cpu_to_be32(1); /* single mirror */
  42. *p++ = cpu_to_be32(1); /* single data server */
  43. p = xdr_encode_opaque_fixed(p, &fl->deviceid,
  44. sizeof(struct nfsd4_deviceid));
  45. *p++ = cpu_to_be32(1); /* efficiency */
  46. *p++ = cpu_to_be32(fl->stateid.si_generation);
  47. p = xdr_encode_opaque_fixed(p, &fl->stateid.si_opaque,
  48. sizeof(stateid_opaque_t));
  49. *p++ = cpu_to_be32(1); /* single file handle */
  50. p = xdr_encode_opaque(p, fl->fh.data, fl->fh.size);
  51. p = xdr_encode_opaque(p, uid.buf, uid.len);
  52. p = xdr_encode_opaque(p, gid.buf, gid.len);
  53. *p++ = cpu_to_be32(fl->flags);
  54. *p++ = cpu_to_be32(0); /* No stats collect hint */
  55. return 0;
  56. }
  57. __be32
  58. nfsd4_ff_encode_getdeviceinfo(struct xdr_stream *xdr,
  59. struct nfsd4_getdeviceinfo *gdp)
  60. {
  61. struct pnfs_ff_device_addr *da = gdp->gd_device;
  62. int len;
  63. int ver_len;
  64. int addr_len;
  65. __be32 *p;
  66. /* len + padding for two strings */
  67. addr_len = 16 + da->netaddr.netid_len + da->netaddr.addr_len;
  68. ver_len = 20;
  69. len = 4 + ver_len + 4 + addr_len;
  70. p = xdr_reserve_space(xdr, len + sizeof(__be32));
  71. if (!p)
  72. return nfserr_resource;
  73. /*
  74. * Fill in the overall length and number of volumes at the beginning
  75. * of the layout.
  76. */
  77. *p++ = cpu_to_be32(len);
  78. *p++ = cpu_to_be32(1); /* 1 netaddr */
  79. p = xdr_encode_opaque(p, da->netaddr.netid, da->netaddr.netid_len);
  80. p = xdr_encode_opaque(p, da->netaddr.addr, da->netaddr.addr_len);
  81. *p++ = cpu_to_be32(1); /* 1 versions */
  82. *p++ = cpu_to_be32(da->version);
  83. *p++ = cpu_to_be32(da->minor_version);
  84. *p++ = cpu_to_be32(da->rsize);
  85. *p++ = cpu_to_be32(da->wsize);
  86. *p++ = cpu_to_be32(da->tightly_coupled);
  87. return 0;
  88. }