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->f_dentry->d_inode);
20 struct ceph_ioctl_layout l;
23 err = ceph_do_getattr(file->f_dentry->d_inode, 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);
30 (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred);
31 if (copy_to_user(arg, &l, sizeof(l)))
38 static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
40 struct inode *inode = file->f_dentry->d_inode;
41 struct inode *parent_inode;
42 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
43 struct ceph_mds_request *req;
44 struct ceph_ioctl_layout l;
45 struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode);
46 struct ceph_ioctl_layout nl;
49 if (copy_from_user(&l, arg, sizeof(l)))
52 /* validate changed params against current layout */
53 err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);
55 nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
56 nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
57 nl.object_size = ceph_file_layout_object_size(ci->i_layout);
58 nl.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
60 (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred);
65 nl.stripe_count = l.stripe_count;
67 nl.stripe_unit = l.stripe_unit;
69 nl.object_size = l.object_size;
71 nl.data_pool = l.data_pool;
73 nl.preferred_osd = l.preferred_osd;
75 if ((nl.object_size & ~PAGE_MASK) ||
76 (nl.stripe_unit & ~PAGE_MASK) ||
77 ((unsigned)nl.object_size % (unsigned)nl.stripe_unit))
80 /* make sure it's a valid data pool */
81 if (l.data_pool > 0) {
82 mutex_lock(&mdsc->mutex);
84 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
85 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
89 mutex_unlock(&mdsc->mutex);
94 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
100 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
102 req->r_args.setlayout.layout.fl_stripe_unit =
103 cpu_to_le32(l.stripe_unit);
104 req->r_args.setlayout.layout.fl_stripe_count =
105 cpu_to_le32(l.stripe_count);
106 req->r_args.setlayout.layout.fl_object_size =
107 cpu_to_le32(l.object_size);
108 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
109 req->r_args.setlayout.layout.fl_pg_preferred =
110 cpu_to_le32(l.preferred_osd);
112 parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
113 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
115 ceph_mdsc_put_request(req);
120 * Set a layout policy on a directory inode. All items in the tree
121 * rooted at this inode will inherit this layout on creation,
122 * (It doesn't apply retroactively )
123 * unless a subdirectory has its own layout policy.
125 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
127 struct inode *inode = file->f_dentry->d_inode;
128 struct ceph_mds_request *req;
129 struct ceph_ioctl_layout l;
131 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
133 /* copy and validate */
134 if (copy_from_user(&l, arg, sizeof(l)))
137 if ((l.object_size & ~PAGE_MASK) ||
138 (l.stripe_unit & ~PAGE_MASK) ||
141 (unsigned)l.object_size % (unsigned)l.stripe_unit))
144 /* make sure it's a valid data pool */
145 if (l.data_pool > 0) {
146 mutex_lock(&mdsc->mutex);
148 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
149 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
153 mutex_unlock(&mdsc->mutex);
158 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
163 req->r_inode = inode;
166 req->r_args.setlayout.layout.fl_stripe_unit =
167 cpu_to_le32(l.stripe_unit);
168 req->r_args.setlayout.layout.fl_stripe_count =
169 cpu_to_le32(l.stripe_count);
170 req->r_args.setlayout.layout.fl_object_size =
171 cpu_to_le32(l.object_size);
172 req->r_args.setlayout.layout.fl_pg_pool =
173 cpu_to_le32(l.data_pool);
174 req->r_args.setlayout.layout.fl_pg_preferred =
175 cpu_to_le32(l.preferred_osd);
177 err = ceph_mdsc_do_request(mdsc, inode, req);
178 ceph_mdsc_put_request(req);
183 * Return object name, size/offset information, and location (OSD
184 * number, network address) for a given file offset.
186 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
188 struct ceph_ioctl_dataloc dl;
189 struct inode *inode = file->f_dentry->d_inode;
190 struct ceph_inode_info *ci = ceph_inode(inode);
191 struct ceph_osd_client *osdc =
192 &ceph_sb_to_client(inode->i_sb)->client->osdc;
195 struct ceph_object_layout ol;
198 /* copy and validate */
199 if (copy_from_user(&dl, arg, sizeof(dl)))
202 down_read(&osdc->map_sem);
203 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
204 &dl.object_no, &dl.object_offset, &olen);
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);
215 ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout,
219 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
221 struct ceph_entity_addr *a =
222 ceph_osd_addr(osdc->osdmap, dl.osd);
224 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
226 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
228 up_read(&osdc->map_sem);
230 /* send result back to user */
231 if (copy_to_user(arg, &dl, sizeof(dl)))
237 static long ceph_ioctl_lazyio(struct file *file)
239 struct ceph_file_info *fi = file->private_data;
240 struct inode *inode = file->f_dentry->d_inode;
241 struct ceph_inode_info *ci = ceph_inode(inode);
243 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
244 spin_lock(&ci->i_ceph_lock);
245 ci->i_nr_by_mode[fi->fmode]--;
246 fi->fmode |= CEPH_FILE_MODE_LAZY;
247 ci->i_nr_by_mode[fi->fmode]++;
248 spin_unlock(&ci->i_ceph_lock);
249 dout("ioctl_layzio: file %p marked lazy\n", file);
251 ceph_check_caps(ci, 0, NULL);
253 dout("ioctl_layzio: file %p already lazy\n", file);
258 static long ceph_ioctl_syncio(struct file *file)
260 struct ceph_file_info *fi = file->private_data;
262 fi->flags |= CEPH_F_SYNC;
266 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
268 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
270 case CEPH_IOC_GET_LAYOUT:
271 return ceph_ioctl_get_layout(file, (void __user *)arg);
273 case CEPH_IOC_SET_LAYOUT:
274 return ceph_ioctl_set_layout(file, (void __user *)arg);
276 case CEPH_IOC_SET_LAYOUT_POLICY:
277 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
279 case CEPH_IOC_GET_DATALOC:
280 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
282 case CEPH_IOC_LAZYIO:
283 return ceph_ioctl_lazyio(file);
285 case CEPH_IOC_SYNCIO:
286 return ceph_ioctl_syncio(file);