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, false);
24 l.stripe_unit = ci->i_layout.stripe_unit;
25 l.stripe_count = ci->i_layout.stripe_count;
26 l.object_size = ci->i_layout.object_size;
27 l.data_pool = ci->i_layout.pool_id;
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 ((unsigned)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, false);
81 memset(&nl, 0, sizeof(nl));
83 nl.stripe_count = l.stripe_count;
85 nl.stripe_count = ci->i_layout.stripe_count;
87 nl.stripe_unit = l.stripe_unit;
89 nl.stripe_unit = ci->i_layout.stripe_unit;
91 nl.object_size = l.object_size;
93 nl.object_size = ci->i_layout.object_size;
95 nl.data_pool = l.data_pool;
97 nl.data_pool = ci->i_layout.pool_id;
99 /* this is obsolete, and always -1 */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;
114 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
116 req->r_args.setlayout.layout.fl_stripe_unit =
117 cpu_to_le32(l.stripe_unit);
118 req->r_args.setlayout.layout.fl_stripe_count =
119 cpu_to_le32(l.stripe_count);
120 req->r_args.setlayout.layout.fl_object_size =
121 cpu_to_le32(l.object_size);
122 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
124 err = ceph_mdsc_do_request(mdsc, NULL, req);
125 ceph_mdsc_put_request(req);
130 * Set a layout policy on a directory inode. All items in the tree
131 * rooted at this inode will inherit this layout on creation,
132 * (It doesn't apply retroactively )
133 * unless a subdirectory has its own layout policy.
135 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
137 struct inode *inode = file_inode(file);
138 struct ceph_mds_request *req;
139 struct ceph_ioctl_layout l;
141 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
143 /* copy and validate */
144 if (copy_from_user(&l, arg, sizeof(l)))
147 err = __validate_layout(mdsc, &l);
151 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
156 req->r_inode = inode;
160 req->r_args.setlayout.layout.fl_stripe_unit =
161 cpu_to_le32(l.stripe_unit);
162 req->r_args.setlayout.layout.fl_stripe_count =
163 cpu_to_le32(l.stripe_count);
164 req->r_args.setlayout.layout.fl_object_size =
165 cpu_to_le32(l.object_size);
166 req->r_args.setlayout.layout.fl_pg_pool =
167 cpu_to_le32(l.data_pool);
169 err = ceph_mdsc_do_request(mdsc, inode, req);
170 ceph_mdsc_put_request(req);
175 * Return object name, size/offset information, and location (OSD
176 * number, network address) for a given file offset.
178 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
180 struct ceph_ioctl_dataloc dl;
181 struct inode *inode = file_inode(file);
182 struct ceph_inode_info *ci = ceph_inode(inode);
183 struct ceph_osd_client *osdc =
184 &ceph_sb_to_client(inode->i_sb)->client->osdc;
185 struct ceph_object_locator oloc;
186 CEPH_DEFINE_OID_ONSTACK(oid);
192 /* copy and validate */
193 if (copy_from_user(&dl, arg, sizeof(dl)))
196 down_read(&osdc->lock);
197 r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
198 &dl.object_no, &dl.object_offset,
201 up_read(&osdc->lock);
204 dl.file_offset -= dl.object_offset;
205 dl.object_size = ci->i_layout.object_size;
206 dl.block_size = ci->i_layout.stripe_unit;
208 /* block_offset = object_offset % block_size */
209 tmp = dl.object_offset;
210 dl.block_offset = do_div(tmp, dl.block_size);
212 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
213 ceph_ino(inode), dl.object_no);
215 oloc.pool = ci->i_layout.pool_id;
216 oloc.pool_ns = ceph_try_get_string(ci->i_layout.pool_ns);
217 ceph_oid_printf(&oid, "%s", dl.object_name);
219 r = ceph_object_locator_to_pg(osdc->osdmap, &oid, &oloc, &pgid);
221 ceph_oloc_destroy(&oloc);
223 up_read(&osdc->lock);
227 dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid);
229 struct ceph_entity_addr *a =
230 ceph_osd_addr(osdc->osdmap, dl.osd);
232 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
234 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
236 up_read(&osdc->lock);
238 /* send result back to user */
239 if (copy_to_user(arg, &dl, sizeof(dl)))
245 static long ceph_ioctl_lazyio(struct file *file)
247 struct ceph_file_info *fi = file->private_data;
248 struct inode *inode = file_inode(file);
249 struct ceph_inode_info *ci = ceph_inode(inode);
251 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
252 spin_lock(&ci->i_ceph_lock);
253 fi->fmode |= CEPH_FILE_MODE_LAZY;
254 ci->i_nr_by_mode[ffs(CEPH_FILE_MODE_LAZY)]++;
255 spin_unlock(&ci->i_ceph_lock);
256 dout("ioctl_layzio: file %p marked lazy\n", file);
258 ceph_check_caps(ci, 0, NULL);
260 dout("ioctl_layzio: file %p already lazy\n", file);
265 static long ceph_ioctl_syncio(struct file *file)
267 struct ceph_file_info *fi = file->private_data;
269 fi->flags |= CEPH_F_SYNC;
273 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
275 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
277 case CEPH_IOC_GET_LAYOUT:
278 return ceph_ioctl_get_layout(file, (void __user *)arg);
280 case CEPH_IOC_SET_LAYOUT:
281 return ceph_ioctl_set_layout(file, (void __user *)arg);
283 case CEPH_IOC_SET_LAYOUT_POLICY:
284 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
286 case CEPH_IOC_GET_DATALOC:
287 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
289 case CEPH_IOC_LAZYIO:
290 return ceph_ioctl_lazyio(file);
292 case CEPH_IOC_SYNCIO:
293 return ceph_ioctl_syncio(file);