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;
47 /* copy and validate */
48 if (copy_from_user(&l, arg, sizeof(l)))
51 if ((l.object_size & ~PAGE_MASK) ||
52 (l.stripe_unit & ~PAGE_MASK) ||
55 (unsigned)l.object_size % (unsigned)l.stripe_unit))
58 /* make sure it's a valid data pool */
59 if (l.data_pool > 0) {
60 mutex_lock(&mdsc->mutex);
62 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
63 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
67 mutex_unlock(&mdsc->mutex);
72 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
78 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
80 req->r_args.setlayout.layout.fl_stripe_unit =
81 cpu_to_le32(l.stripe_unit);
82 req->r_args.setlayout.layout.fl_stripe_count =
83 cpu_to_le32(l.stripe_count);
84 req->r_args.setlayout.layout.fl_object_size =
85 cpu_to_le32(l.object_size);
86 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
87 req->r_args.setlayout.layout.fl_pg_preferred =
88 cpu_to_le32(l.preferred_osd);
90 parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
91 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
93 ceph_mdsc_put_request(req);
98 * Set a layout policy on a directory inode. All items in the tree
99 * rooted at this inode will inherit this layout on creation,
100 * (It doesn't apply retroactively )
101 * unless a subdirectory has its own layout policy.
103 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
105 struct inode *inode = file->f_dentry->d_inode;
106 struct ceph_mds_request *req;
107 struct ceph_ioctl_layout l;
109 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
111 /* copy and validate */
112 if (copy_from_user(&l, arg, sizeof(l)))
115 if ((l.object_size & ~PAGE_MASK) ||
116 (l.stripe_unit & ~PAGE_MASK) ||
119 (unsigned)l.object_size % (unsigned)l.stripe_unit))
122 /* make sure it's a valid data pool */
123 if (l.data_pool > 0) {
124 mutex_lock(&mdsc->mutex);
126 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
127 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
131 mutex_unlock(&mdsc->mutex);
136 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
141 req->r_inode = inode;
144 req->r_args.setlayout.layout.fl_stripe_unit =
145 cpu_to_le32(l.stripe_unit);
146 req->r_args.setlayout.layout.fl_stripe_count =
147 cpu_to_le32(l.stripe_count);
148 req->r_args.setlayout.layout.fl_object_size =
149 cpu_to_le32(l.object_size);
150 req->r_args.setlayout.layout.fl_pg_pool =
151 cpu_to_le32(l.data_pool);
152 req->r_args.setlayout.layout.fl_pg_preferred =
153 cpu_to_le32(l.preferred_osd);
155 err = ceph_mdsc_do_request(mdsc, inode, req);
156 ceph_mdsc_put_request(req);
161 * Return object name, size/offset information, and location (OSD
162 * number, network address) for a given file offset.
164 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
166 struct ceph_ioctl_dataloc dl;
167 struct inode *inode = file->f_dentry->d_inode;
168 struct ceph_inode_info *ci = ceph_inode(inode);
169 struct ceph_osd_client *osdc =
170 &ceph_sb_to_client(inode->i_sb)->client->osdc;
173 struct ceph_object_layout ol;
176 /* copy and validate */
177 if (copy_from_user(&dl, arg, sizeof(dl)))
180 down_read(&osdc->map_sem);
181 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
182 &dl.object_no, &dl.object_offset, &olen);
183 dl.file_offset -= dl.object_offset;
184 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
185 dl.block_size = ceph_file_layout_su(ci->i_layout);
187 /* block_offset = object_offset % block_size */
188 tmp = dl.object_offset;
189 dl.block_offset = do_div(tmp, dl.block_size);
191 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
192 ceph_ino(inode), dl.object_no);
193 ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout,
197 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
199 struct ceph_entity_addr *a =
200 ceph_osd_addr(osdc->osdmap, dl.osd);
202 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
204 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
206 up_read(&osdc->map_sem);
208 /* send result back to user */
209 if (copy_to_user(arg, &dl, sizeof(dl)))
215 static long ceph_ioctl_lazyio(struct file *file)
217 struct ceph_file_info *fi = file->private_data;
218 struct inode *inode = file->f_dentry->d_inode;
219 struct ceph_inode_info *ci = ceph_inode(inode);
221 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
222 spin_lock(&inode->i_lock);
223 ci->i_nr_by_mode[fi->fmode]--;
224 fi->fmode |= CEPH_FILE_MODE_LAZY;
225 ci->i_nr_by_mode[fi->fmode]++;
226 spin_unlock(&inode->i_lock);
227 dout("ioctl_layzio: file %p marked lazy\n", file);
229 ceph_check_caps(ci, 0, NULL);
231 dout("ioctl_layzio: file %p already lazy\n", file);
236 static long ceph_ioctl_syncio(struct file *file)
238 struct ceph_file_info *fi = file->private_data;
240 fi->flags |= CEPH_F_SYNC;
244 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
246 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
248 case CEPH_IOC_GET_LAYOUT:
249 return ceph_ioctl_get_layout(file, (void __user *)arg);
251 case CEPH_IOC_SET_LAYOUT:
252 return ceph_ioctl_set_layout(file, (void __user *)arg);
254 case CEPH_IOC_SET_LAYOUT_POLICY:
255 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
257 case CEPH_IOC_GET_DATALOC:
258 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
260 case CEPH_IOC_LAZYIO:
261 return ceph_ioctl_lazyio(file);
263 case CEPH_IOC_SYNCIO:
264 return ceph_ioctl_syncio(file);