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100 /* this is obsolete, and always -1 */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;
113 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
115 req->r_args.setlayout.layout.fl_stripe_unit =
116 cpu_to_le32(l.stripe_unit);
117 req->r_args.setlayout.layout.fl_stripe_count =
118 cpu_to_le32(l.stripe_count);
119 req->r_args.setlayout.layout.fl_object_size =
120 cpu_to_le32(l.object_size);
121 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
123 err = ceph_mdsc_do_request(mdsc, NULL, req);
124 ceph_mdsc_put_request(req);
129 * Set a layout policy on a directory inode. All items in the tree
130 * rooted at this inode will inherit this layout on creation,
131 * (It doesn't apply retroactively )
132 * unless a subdirectory has its own layout policy.
134 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
136 struct inode *inode = file_inode(file);
137 struct ceph_mds_request *req;
138 struct ceph_ioctl_layout l;
140 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
142 /* copy and validate */
143 if (copy_from_user(&l, arg, sizeof(l)))
146 err = __validate_layout(mdsc, &l);
150 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
155 req->r_inode = inode;
158 req->r_args.setlayout.layout.fl_stripe_unit =
159 cpu_to_le32(l.stripe_unit);
160 req->r_args.setlayout.layout.fl_stripe_count =
161 cpu_to_le32(l.stripe_count);
162 req->r_args.setlayout.layout.fl_object_size =
163 cpu_to_le32(l.object_size);
164 req->r_args.setlayout.layout.fl_pg_pool =
165 cpu_to_le32(l.data_pool);
167 err = ceph_mdsc_do_request(mdsc, inode, req);
168 ceph_mdsc_put_request(req);
173 * Return object name, size/offset information, and location (OSD
174 * number, network address) for a given file offset.
176 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
178 struct ceph_ioctl_dataloc dl;
179 struct inode *inode = file_inode(file);
180 struct ceph_inode_info *ci = ceph_inode(inode);
181 struct ceph_osd_client *osdc =
182 &ceph_sb_to_client(inode->i_sb)->client->osdc;
183 struct ceph_object_locator oloc;
184 struct ceph_object_id oid;
190 /* copy and validate */
191 if (copy_from_user(&dl, arg, sizeof(dl)))
194 down_read(&osdc->map_sem);
195 r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
196 &dl.object_no, &dl.object_offset,
199 up_read(&osdc->map_sem);
202 dl.file_offset -= dl.object_offset;
203 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
204 dl.block_size = ceph_file_layout_su(ci->i_layout);
206 /* block_offset = object_offset % block_size */
207 tmp = dl.object_offset;
208 dl.block_offset = do_div(tmp, dl.block_size);
210 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
211 ceph_ino(inode), dl.object_no);
213 oloc.pool = ceph_file_layout_pg_pool(ci->i_layout);
214 ceph_oid_set_name(&oid, dl.object_name);
216 r = ceph_oloc_oid_to_pg(osdc->osdmap, &oloc, &oid, &pgid);
218 up_read(&osdc->map_sem);
222 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
224 struct ceph_entity_addr *a =
225 ceph_osd_addr(osdc->osdmap, dl.osd);
227 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
229 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
231 up_read(&osdc->map_sem);
233 /* send result back to user */
234 if (copy_to_user(arg, &dl, sizeof(dl)))
240 static long ceph_ioctl_lazyio(struct file *file)
242 struct ceph_file_info *fi = file->private_data;
243 struct inode *inode = file_inode(file);
244 struct ceph_inode_info *ci = ceph_inode(inode);
246 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
247 spin_lock(&ci->i_ceph_lock);
248 ci->i_nr_by_mode[fi->fmode]--;
249 fi->fmode |= CEPH_FILE_MODE_LAZY;
250 ci->i_nr_by_mode[fi->fmode]++;
251 spin_unlock(&ci->i_ceph_lock);
252 dout("ioctl_layzio: file %p marked lazy\n", file);
254 ceph_check_caps(ci, 0, NULL);
256 dout("ioctl_layzio: file %p already lazy\n", file);
261 static long ceph_ioctl_syncio(struct file *file)
263 struct ceph_file_info *fi = file->private_data;
265 fi->flags |= CEPH_F_SYNC;
269 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
271 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
273 case CEPH_IOC_GET_LAYOUT:
274 return ceph_ioctl_get_layout(file, (void __user *)arg);
276 case CEPH_IOC_SET_LAYOUT:
277 return ceph_ioctl_set_layout(file, (void __user *)arg);
279 case CEPH_IOC_SET_LAYOUT_POLICY:
280 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
282 case CEPH_IOC_GET_DATALOC:
283 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
285 case CEPH_IOC_LAZYIO:
286 return ceph_ioctl_lazyio(file);
288 case CEPH_IOC_SYNCIO:
289 return ceph_ioctl_syncio(file);