1 #include <linux/ceph/ceph_debug.h>
5 #include "mds_client.h"
14 * get and set the file layout
16 static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
18 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
19 struct ceph_ioctl_layout l;
22 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
24 l.stripe_unit = ceph_file_layout_su(ci->i_layout);
25 l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
26 l.object_size = ceph_file_layout_object_size(ci->i_layout);
27 l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
28 l.preferred_osd = (s32)-1;
29 if (copy_to_user(arg, &l, sizeof(l)))
36 static long __validate_layout(struct ceph_mds_client *mdsc,
37 struct ceph_ioctl_layout *l)
41 /* validate striping parameters */
42 if ((l->object_size & ~PAGE_MASK) ||
43 (l->stripe_unit & ~PAGE_MASK) ||
44 (l->stripe_unit != 0 &&
45 ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
48 /* make sure it's a valid data pool */
49 mutex_lock(&mdsc->mutex);
51 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
52 if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) {
56 mutex_unlock(&mdsc->mutex);
63 static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
65 struct inode *inode = file_inode(file);
66 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
67 struct ceph_mds_request *req;
68 struct ceph_ioctl_layout l;
69 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
70 struct ceph_ioctl_layout nl;
73 if (copy_from_user(&l, arg, sizeof(l)))
76 /* validate changed params against current layout */
77 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
81 memset(&nl, 0, sizeof(nl));
83 nl.stripe_count = l.stripe_count;
85 nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
87 nl.stripe_unit = l.stripe_unit;
89 nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
91 nl.object_size = l.object_size;
93 nl.object_size = ceph_file_layout_object_size(ci->i_layout);
95 nl.data_pool = l.data_pool;
97 nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout);
99 /* this is obsolete, and always -1 */
100 nl.preferred_osd = le64_to_cpu(-1);
102 err = __validate_layout(mdsc, &nl);
106 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
110 req->r_inode = inode;
112 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
114 req->r_args.setlayout.layout.fl_stripe_unit =
115 cpu_to_le32(l.stripe_unit);
116 req->r_args.setlayout.layout.fl_stripe_count =
117 cpu_to_le32(l.stripe_count);
118 req->r_args.setlayout.layout.fl_object_size =
119 cpu_to_le32(l.object_size);
120 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
122 err = ceph_mdsc_do_request(mdsc, NULL, req);
123 ceph_mdsc_put_request(req);
128 * Set a layout policy on a directory inode. All items in the tree
129 * rooted at this inode will inherit this layout on creation,
130 * (It doesn't apply retroactively )
131 * unless a subdirectory has its own layout policy.
133 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
135 struct inode *inode = file_inode(file);
136 struct ceph_mds_request *req;
137 struct ceph_ioctl_layout l;
139 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
141 /* copy and validate */
142 if (copy_from_user(&l, arg, sizeof(l)))
145 err = __validate_layout(mdsc, &l);
149 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
154 req->r_inode = inode;
157 req->r_args.setlayout.layout.fl_stripe_unit =
158 cpu_to_le32(l.stripe_unit);
159 req->r_args.setlayout.layout.fl_stripe_count =
160 cpu_to_le32(l.stripe_count);
161 req->r_args.setlayout.layout.fl_object_size =
162 cpu_to_le32(l.object_size);
163 req->r_args.setlayout.layout.fl_pg_pool =
164 cpu_to_le32(l.data_pool);
166 err = ceph_mdsc_do_request(mdsc, inode, req);
167 ceph_mdsc_put_request(req);
172 * Return object name, size/offset information, and location (OSD
173 * number, network address) for a given file offset.
175 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
177 struct ceph_ioctl_dataloc dl;
178 struct inode *inode = file_inode(file);
179 struct ceph_inode_info *ci = ceph_inode(inode);
180 struct ceph_osd_client *osdc =
181 &ceph_sb_to_client(inode->i_sb)->client->osdc;
182 struct ceph_object_locator oloc;
183 struct ceph_object_id oid;
189 /* copy and validate */
190 if (copy_from_user(&dl, arg, sizeof(dl)))
193 down_read(&osdc->map_sem);
194 r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
195 &dl.object_no, &dl.object_offset,
198 up_read(&osdc->map_sem);
201 dl.file_offset -= dl.object_offset;
202 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
203 dl.block_size = ceph_file_layout_su(ci->i_layout);
205 /* block_offset = object_offset % block_size */
206 tmp = dl.object_offset;
207 dl.block_offset = do_div(tmp, dl.block_size);
209 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
210 ceph_ino(inode), dl.object_no);
212 oloc.pool = ceph_file_layout_pg_pool(ci->i_layout);
213 ceph_oid_set_name(&oid, dl.object_name);
215 r = ceph_oloc_oid_to_pg(osdc->osdmap, &oloc, &oid, &pgid);
217 up_read(&osdc->map_sem);
221 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
223 struct ceph_entity_addr *a =
224 ceph_osd_addr(osdc->osdmap, dl.osd);
226 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
228 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
230 up_read(&osdc->map_sem);
232 /* send result back to user */
233 if (copy_to_user(arg, &dl, sizeof(dl)))
239 static long ceph_ioctl_lazyio(struct file *file)
241 struct ceph_file_info *fi = file->private_data;
242 struct inode *inode = file_inode(file);
243 struct ceph_inode_info *ci = ceph_inode(inode);
245 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
246 spin_lock(&ci->i_ceph_lock);
247 ci->i_nr_by_mode[fi->fmode]--;
248 fi->fmode |= CEPH_FILE_MODE_LAZY;
249 ci->i_nr_by_mode[fi->fmode]++;
250 spin_unlock(&ci->i_ceph_lock);
251 dout("ioctl_layzio: file %p marked lazy\n", file);
253 ceph_check_caps(ci, 0, NULL);
255 dout("ioctl_layzio: file %p already lazy\n", file);
260 static long ceph_ioctl_syncio(struct file *file)
262 struct ceph_file_info *fi = file->private_data;
264 fi->flags |= CEPH_F_SYNC;
268 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
270 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
272 case CEPH_IOC_GET_LAYOUT:
273 return ceph_ioctl_get_layout(file, (void __user *)arg);
275 case CEPH_IOC_SET_LAYOUT:
276 return ceph_ioctl_set_layout(file, (void __user *)arg);
278 case CEPH_IOC_SET_LAYOUT_POLICY:
279 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
281 case CEPH_IOC_GET_DATALOC:
282 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
284 case CEPH_IOC_LAZYIO:
285 return ceph_ioctl_lazyio(file);
287 case CEPH_IOC_SYNCIO:
288 return ceph_ioctl_syncio(file);