ioctl.c 7.5 KB

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  1. #include <linux/ceph/ceph_debug.h>
  2. #include <linux/in.h>
  3. #include "super.h"
  4. #include "mds_client.h"
  5. #include "ioctl.h"
  6. /*
  7. * ioctls
  8. */
  9. /*
  10. * get and set the file layout
  11. */
  12. static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
  13. {
  14. struct ceph_inode_info *ci = ceph_inode(file_inode(file));
  15. struct ceph_ioctl_layout l;
  16. int err;
  17. err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);
  18. if (!err) {
  19. l.stripe_unit = ceph_file_layout_su(ci->i_layout);
  20. l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
  21. l.object_size = ceph_file_layout_object_size(ci->i_layout);
  22. l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
  23. l.preferred_osd = (s32)-1;
  24. if (copy_to_user(arg, &l, sizeof(l)))
  25. return -EFAULT;
  26. }
  27. return err;
  28. }
  29. static long __validate_layout(struct ceph_mds_client *mdsc,
  30. struct ceph_ioctl_layout *l)
  31. {
  32. int i, err;
  33. /* validate striping parameters */
  34. if ((l->object_size & ~PAGE_MASK) ||
  35. (l->stripe_unit & ~PAGE_MASK) ||
  36. ((unsigned)l->stripe_unit != 0 &&
  37. ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
  38. return -EINVAL;
  39. /* make sure it's a valid data pool */
  40. mutex_lock(&mdsc->mutex);
  41. err = -EINVAL;
  42. for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
  43. if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) {
  44. err = 0;
  45. break;
  46. }
  47. mutex_unlock(&mdsc->mutex);
  48. if (err)
  49. return err;
  50. return 0;
  51. }
  52. static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
  53. {
  54. struct inode *inode = file_inode(file);
  55. struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
  56. struct ceph_mds_request *req;
  57. struct ceph_ioctl_layout l;
  58. struct ceph_inode_info *ci = ceph_inode(file_inode(file));
  59. struct ceph_ioctl_layout nl;
  60. int err;
  61. if (copy_from_user(&l, arg, sizeof(l)))
  62. return -EFAULT;
  63. /* validate changed params against current layout */
  64. err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);
  65. if (err)
  66. return err;
  67. memset(&nl, 0, sizeof(nl));
  68. if (l.stripe_count)
  69. nl.stripe_count = l.stripe_count;
  70. else
  71. nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
  72. if (l.stripe_unit)
  73. nl.stripe_unit = l.stripe_unit;
  74. else
  75. nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
  76. if (l.object_size)
  77. nl.object_size = l.object_size;
  78. else
  79. nl.object_size = ceph_file_layout_object_size(ci->i_layout);
  80. if (l.data_pool)
  81. nl.data_pool = l.data_pool;
  82. else
  83. nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout);
  84. /* this is obsolete, and always -1 */
  85. nl.preferred_osd = le64_to_cpu(-1);
  86. err = __validate_layout(mdsc, &nl);
  87. if (err)
  88. return err;
  89. req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
  90. USE_AUTH_MDS);
  91. if (IS_ERR(req))
  92. return PTR_ERR(req);
  93. req->r_inode = inode;
  94. ihold(inode);
  95. req->r_num_caps = 1;
  96. req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
  97. req->r_args.setlayout.layout.fl_stripe_unit =
  98. cpu_to_le32(l.stripe_unit);
  99. req->r_args.setlayout.layout.fl_stripe_count =
  100. cpu_to_le32(l.stripe_count);
  101. req->r_args.setlayout.layout.fl_object_size =
  102. cpu_to_le32(l.object_size);
  103. req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
  104. err = ceph_mdsc_do_request(mdsc, NULL, req);
  105. ceph_mdsc_put_request(req);
  106. return err;
  107. }
  108. /*
  109. * Set a layout policy on a directory inode. All items in the tree
  110. * rooted at this inode will inherit this layout on creation,
  111. * (It doesn't apply retroactively )
  112. * unless a subdirectory has its own layout policy.
  113. */
  114. static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
  115. {
  116. struct inode *inode = file_inode(file);
  117. struct ceph_mds_request *req;
  118. struct ceph_ioctl_layout l;
  119. int err;
  120. struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
  121. /* copy and validate */
  122. if (copy_from_user(&l, arg, sizeof(l)))
  123. return -EFAULT;
  124. err = __validate_layout(mdsc, &l);
  125. if (err)
  126. return err;
  127. req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
  128. USE_AUTH_MDS);
  129. if (IS_ERR(req))
  130. return PTR_ERR(req);
  131. req->r_inode = inode;
  132. ihold(inode);
  133. req->r_num_caps = 1;
  134. req->r_args.setlayout.layout.fl_stripe_unit =
  135. cpu_to_le32(l.stripe_unit);
  136. req->r_args.setlayout.layout.fl_stripe_count =
  137. cpu_to_le32(l.stripe_count);
  138. req->r_args.setlayout.layout.fl_object_size =
  139. cpu_to_le32(l.object_size);
  140. req->r_args.setlayout.layout.fl_pg_pool =
  141. cpu_to_le32(l.data_pool);
  142. err = ceph_mdsc_do_request(mdsc, inode, req);
  143. ceph_mdsc_put_request(req);
  144. return err;
  145. }
  146. /*
  147. * Return object name, size/offset information, and location (OSD
  148. * number, network address) for a given file offset.
  149. */
  150. static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
  151. {
  152. struct ceph_ioctl_dataloc dl;
  153. struct inode *inode = file_inode(file);
  154. struct ceph_inode_info *ci = ceph_inode(inode);
  155. struct ceph_osd_client *osdc =
  156. &ceph_sb_to_client(inode->i_sb)->client->osdc;
  157. struct ceph_object_locator oloc;
  158. struct ceph_object_id oid;
  159. u64 len = 1, olen;
  160. u64 tmp;
  161. struct ceph_pg pgid;
  162. int r;
  163. /* copy and validate */
  164. if (copy_from_user(&dl, arg, sizeof(dl)))
  165. return -EFAULT;
  166. down_read(&osdc->map_sem);
  167. r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
  168. &dl.object_no, &dl.object_offset,
  169. &olen);
  170. if (r < 0) {
  171. up_read(&osdc->map_sem);
  172. return -EIO;
  173. }
  174. dl.file_offset -= dl.object_offset;
  175. dl.object_size = ceph_file_layout_object_size(ci->i_layout);
  176. dl.block_size = ceph_file_layout_su(ci->i_layout);
  177. /* block_offset = object_offset % block_size */
  178. tmp = dl.object_offset;
  179. dl.block_offset = do_div(tmp, dl.block_size);
  180. snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
  181. ceph_ino(inode), dl.object_no);
  182. oloc.pool = ceph_file_layout_pg_pool(ci->i_layout);
  183. ceph_oid_set_name(&oid, dl.object_name);
  184. r = ceph_oloc_oid_to_pg(osdc->osdmap, &oloc, &oid, &pgid);
  185. if (r < 0) {
  186. up_read(&osdc->map_sem);
  187. return r;
  188. }
  189. dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
  190. if (dl.osd >= 0) {
  191. struct ceph_entity_addr *a =
  192. ceph_osd_addr(osdc->osdmap, dl.osd);
  193. if (a)
  194. memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
  195. } else {
  196. memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
  197. }
  198. up_read(&osdc->map_sem);
  199. /* send result back to user */
  200. if (copy_to_user(arg, &dl, sizeof(dl)))
  201. return -EFAULT;
  202. return 0;
  203. }
  204. static long ceph_ioctl_lazyio(struct file *file)
  205. {
  206. struct ceph_file_info *fi = file->private_data;
  207. struct inode *inode = file_inode(file);
  208. struct ceph_inode_info *ci = ceph_inode(inode);
  209. if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
  210. spin_lock(&ci->i_ceph_lock);
  211. ci->i_nr_by_mode[fi->fmode]--;
  212. fi->fmode |= CEPH_FILE_MODE_LAZY;
  213. ci->i_nr_by_mode[fi->fmode]++;
  214. spin_unlock(&ci->i_ceph_lock);
  215. dout("ioctl_layzio: file %p marked lazy\n", file);
  216. ceph_check_caps(ci, 0, NULL);
  217. } else {
  218. dout("ioctl_layzio: file %p already lazy\n", file);
  219. }
  220. return 0;
  221. }
  222. static long ceph_ioctl_syncio(struct file *file)
  223. {
  224. struct ceph_file_info *fi = file->private_data;
  225. fi->flags |= CEPH_F_SYNC;
  226. return 0;
  227. }
  228. long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
  229. {
  230. dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
  231. switch (cmd) {
  232. case CEPH_IOC_GET_LAYOUT:
  233. return ceph_ioctl_get_layout(file, (void __user *)arg);
  234. case CEPH_IOC_SET_LAYOUT:
  235. return ceph_ioctl_set_layout(file, (void __user *)arg);
  236. case CEPH_IOC_SET_LAYOUT_POLICY:
  237. return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
  238. case CEPH_IOC_GET_DATALOC:
  239. return ceph_ioctl_get_dataloc(file, (void __user *)arg);
  240. case CEPH_IOC_LAZYIO:
  241. return ceph_ioctl_lazyio(file);
  242. case CEPH_IOC_SYNCIO:
  243. return ceph_ioctl_syncio(file);
  244. }
  245. return -ENOTTY;
  246. }