4 #include "mds_client.h"
5 #include <linux/ceph/ceph_debug.h>
15 * get and set the file layout
17 static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
19 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
20 struct ceph_ioctl_layout l;
23 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
25 l.stripe_unit = ceph_file_layout_su(ci->i_layout);
26 l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
27 l.object_size = ceph_file_layout_object_size(ci->i_layout);
28 l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
29 l.preferred_osd = (s32)-1;
30 if (copy_to_user(arg, &l, sizeof(l)))
37 static long __validate_layout(struct ceph_mds_client *mdsc,
38 struct ceph_ioctl_layout *l)
42 /* validate striping parameters */
43 if ((l->object_size & ~PAGE_MASK) ||
44 (l->stripe_unit & ~PAGE_MASK) ||
45 (l->stripe_unit != 0 &&
46 ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
49 /* make sure it's a valid data pool */
50 mutex_lock(&mdsc->mutex);
52 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
53 if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) {
57 mutex_unlock(&mdsc->mutex);
64 static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
66 struct inode *inode = file_inode(file);
67 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
68 struct ceph_mds_request *req;
69 struct ceph_ioctl_layout l;
70 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
71 struct ceph_ioctl_layout nl;
74 if (copy_from_user(&l, arg, sizeof(l)))
77 /* validate changed params against current layout */
78 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
82 memset(&nl, 0, sizeof(nl));
84 nl.stripe_count = l.stripe_count;
86 nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
88 nl.stripe_unit = l.stripe_unit;
90 nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
92 nl.object_size = l.object_size;
94 nl.object_size = ceph_file_layout_object_size(ci->i_layout);
96 nl.data_pool = l.data_pool;
98 nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout);
100 /* this is obsolete, and always -1 */
101 nl.preferred_osd = le64_to_cpu(-1);
103 err = __validate_layout(mdsc, &nl);
107 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
111 req->r_inode = inode;
115 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
117 req->r_args.setlayout.layout.fl_stripe_unit =
118 cpu_to_le32(l.stripe_unit);
119 req->r_args.setlayout.layout.fl_stripe_count =
120 cpu_to_le32(l.stripe_count);
121 req->r_args.setlayout.layout.fl_object_size =
122 cpu_to_le32(l.object_size);
123 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
125 err = ceph_mdsc_do_request(mdsc, NULL, req);
126 ceph_mdsc_put_request(req);
131 * Set a layout policy on a directory inode. All items in the tree
132 * rooted at this inode will inherit this layout on creation,
133 * (It doesn't apply retroactively )
134 * unless a subdirectory has its own layout policy.
136 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
138 struct inode *inode = file_inode(file);
139 struct ceph_mds_request *req;
140 struct ceph_ioctl_layout l;
142 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
144 /* copy and validate */
145 if (copy_from_user(&l, arg, sizeof(l)))
148 err = __validate_layout(mdsc, &l);
152 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
157 req->r_inode = inode;
161 req->r_args.setlayout.layout.fl_stripe_unit =
162 cpu_to_le32(l.stripe_unit);
163 req->r_args.setlayout.layout.fl_stripe_count =
164 cpu_to_le32(l.stripe_count);
165 req->r_args.setlayout.layout.fl_object_size =
166 cpu_to_le32(l.object_size);
167 req->r_args.setlayout.layout.fl_pg_pool =
168 cpu_to_le32(l.data_pool);
170 err = ceph_mdsc_do_request(mdsc, inode, req);
171 ceph_mdsc_put_request(req);
176 * Return object name, size/offset information, and location (OSD
177 * number, network address) for a given file offset.
179 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
181 struct ceph_ioctl_dataloc dl;
182 struct inode *inode = file_inode(file);
183 struct ceph_inode_info *ci = ceph_inode(inode);
184 struct ceph_osd_client *osdc =
185 &ceph_sb_to_client(inode->i_sb)->client->osdc;
186 struct ceph_object_locator oloc;
187 struct ceph_object_id oid;
193 /* copy and validate */
194 if (copy_from_user(&dl, arg, sizeof(dl)))
197 down_read(&osdc->map_sem);
198 r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
199 &dl.object_no, &dl.object_offset,
202 up_read(&osdc->map_sem);
205 dl.file_offset -= dl.object_offset;
206 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
207 dl.block_size = ceph_file_layout_su(ci->i_layout);
209 /* block_offset = object_offset % block_size */
210 tmp = dl.object_offset;
211 dl.block_offset = do_div(tmp, dl.block_size);
213 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
214 ceph_ino(inode), dl.object_no);
216 oloc.pool = ceph_file_layout_pg_pool(ci->i_layout);
217 ceph_oid_set_name(&oid, dl.object_name);
219 r = ceph_oloc_oid_to_pg(osdc->osdmap, &oloc, &oid, &pgid);
221 up_read(&osdc->map_sem);
225 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
227 struct ceph_entity_addr *a =
228 ceph_osd_addr(osdc->osdmap, dl.osd);
230 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
232 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
234 up_read(&osdc->map_sem);
236 /* send result back to user */
237 if (copy_to_user(arg, &dl, sizeof(dl)))
243 static long ceph_ioctl_lazyio(struct file *file)
245 struct ceph_file_info *fi = file->private_data;
246 struct inode *inode = file_inode(file);
247 struct ceph_inode_info *ci = ceph_inode(inode);
249 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
250 spin_lock(&ci->i_ceph_lock);
251 ci->i_nr_by_mode[fi->fmode]--;
252 fi->fmode |= CEPH_FILE_MODE_LAZY;
253 ci->i_nr_by_mode[fi->fmode]++;
254 spin_unlock(&ci->i_ceph_lock);
255 dout("ioctl_layzio: file %p marked lazy\n", file);
257 ceph_check_caps(ci, 0, NULL);
259 dout("ioctl_layzio: file %p already lazy\n", file);
264 static long ceph_ioctl_syncio(struct file *file)
266 struct ceph_file_info *fi = file->private_data;
268 fi->flags |= CEPH_F_SYNC;
272 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
274 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
276 case CEPH_IOC_GET_LAYOUT:
277 return ceph_ioctl_get_layout(file, (void __user *)arg);
279 case CEPH_IOC_SET_LAYOUT:
280 return ceph_ioctl_set_layout(file, (void __user *)arg);
282 case CEPH_IOC_SET_LAYOUT_POLICY:
283 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
285 case CEPH_IOC_GET_DATALOC:
286 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
288 case CEPH_IOC_LAZYIO:
289 return ceph_ioctl_lazyio(file);
291 case CEPH_IOC_SYNCIO:
292 return ceph_ioctl_syncio(file);