1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
3 #include <linux/in.h>
4
5 #include "super.h"
6 #include "mds_client.h"
7 #include "ioctl.h"
8 #include <linux/ceph/striper.h>
9
10 /*
11 * ioctls
12 */
13
14 /*
15 * get and set the file layout
16 */
ceph_ioctl_get_layout(struct file * file,void __user * arg)17 static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
18 {
19 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
20 struct ceph_ioctl_layout l;
21 int err;
22
23 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);
24 if (!err) {
25 l.stripe_unit = ci->i_layout.stripe_unit;
26 l.stripe_count = ci->i_layout.stripe_count;
27 l.object_size = ci->i_layout.object_size;
28 l.data_pool = ci->i_layout.pool_id;
29 l.preferred_osd = -1;
30 if (copy_to_user(arg, &l, sizeof(l)))
31 return -EFAULT;
32 }
33
34 return err;
35 }
36
__validate_layout(struct ceph_mds_client * mdsc,struct ceph_ioctl_layout * l)37 static long __validate_layout(struct ceph_mds_client *mdsc,
38 struct ceph_ioctl_layout *l)
39 {
40 int i, err;
41
42 /* validate striping parameters */
43 if ((l->object_size & ~PAGE_MASK) ||
44 (l->stripe_unit & ~PAGE_MASK) ||
45 ((unsigned)l->stripe_unit != 0 &&
46 ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
47 return -EINVAL;
48
49 /* make sure it's a valid data pool */
50 mutex_lock(&mdsc->mutex);
51 err = -EINVAL;
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) {
54 err = 0;
55 break;
56 }
57 mutex_unlock(&mdsc->mutex);
58 if (err)
59 return err;
60
61 return 0;
62 }
63
ceph_ioctl_set_layout(struct file * file,void __user * arg)64 static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
65 {
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;
72 int err;
73
74 if (copy_from_user(&l, arg, sizeof(l)))
75 return -EFAULT;
76
77 /* validate changed params against current layout */
78 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);
79 if (err)
80 return err;
81
82 memset(&nl, 0, sizeof(nl));
83 if (l.stripe_count)
84 nl.stripe_count = l.stripe_count;
85 else
86 nl.stripe_count = ci->i_layout.stripe_count;
87 if (l.stripe_unit)
88 nl.stripe_unit = l.stripe_unit;
89 else
90 nl.stripe_unit = ci->i_layout.stripe_unit;
91 if (l.object_size)
92 nl.object_size = l.object_size;
93 else
94 nl.object_size = ci->i_layout.object_size;
95 if (l.data_pool)
96 nl.data_pool = l.data_pool;
97 else
98 nl.data_pool = ci->i_layout.pool_id;
99
100 /* this is obsolete, and always -1 */
101 nl.preferred_osd = -1;
102
103 err = __validate_layout(mdsc, &nl);
104 if (err)
105 return err;
106
107 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
108 USE_AUTH_MDS);
109 if (IS_ERR(req))
110 return PTR_ERR(req);
111 req->r_inode = inode;
112 ihold(inode);
113 req->r_num_caps = 1;
114
115 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
116
117 req->r_args.setlayout.layout.fl_stripe_unit =
118 cpu_to_le32(l.stripe_unit);
119 req->r_args.setlayout.layout.fl_stripe_count =
120 cpu_to_le32(l.stripe_count);
121 req->r_args.setlayout.layout.fl_object_size =
122 cpu_to_le32(l.object_size);
123 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
124
125 err = ceph_mdsc_do_request(mdsc, NULL, req);
126 ceph_mdsc_put_request(req);
127 return err;
128 }
129
130 /*
131 * Set a layout policy on a directory inode. All items in the tree
132 * rooted at this inode will inherit this layout on creation,
133 * (It doesn't apply retroactively )
134 * unless a subdirectory has its own layout policy.
135 */
ceph_ioctl_set_layout_policy(struct file * file,void __user * arg)136 static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
137 {
138 struct inode *inode = file_inode(file);
139 struct ceph_mds_request *req;
140 struct ceph_ioctl_layout l;
141 int err;
142 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
143
144 /* copy and validate */
145 if (copy_from_user(&l, arg, sizeof(l)))
146 return -EFAULT;
147
148 err = __validate_layout(mdsc, &l);
149 if (err)
150 return err;
151
152 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
153 USE_AUTH_MDS);
154
155 if (IS_ERR(req))
156 return PTR_ERR(req);
157 req->r_inode = inode;
158 ihold(inode);
159 req->r_num_caps = 1;
160
161 req->r_args.setlayout.layout.fl_stripe_unit =
162 cpu_to_le32(l.stripe_unit);
163 req->r_args.setlayout.layout.fl_stripe_count =
164 cpu_to_le32(l.stripe_count);
165 req->r_args.setlayout.layout.fl_object_size =
166 cpu_to_le32(l.object_size);
167 req->r_args.setlayout.layout.fl_pg_pool =
168 cpu_to_le32(l.data_pool);
169
170 err = ceph_mdsc_do_request(mdsc, inode, req);
171 ceph_mdsc_put_request(req);
172 return err;
173 }
174
175 /*
176 * Return object name, size/offset information, and location (OSD
177 * number, network address) for a given file offset.
178 */
ceph_ioctl_get_dataloc(struct file * file,void __user * arg)179 static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
180 {
181 struct ceph_ioctl_dataloc dl;
182 struct inode *inode = file_inode(file);
183 struct ceph_inode_info *ci = ceph_inode(inode);
184 struct ceph_osd_client *osdc =
185 &ceph_sb_to_client(inode->i_sb)->client->osdc;
186 struct ceph_object_locator oloc;
187 CEPH_DEFINE_OID_ONSTACK(oid);
188 u32 xlen;
189 u64 tmp;
190 struct ceph_pg pgid;
191 int r;
192
193 /* copy and validate */
194 if (copy_from_user(&dl, arg, sizeof(dl)))
195 return -EFAULT;
196
197 down_read(&osdc->lock);
198 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, 1,
199 &dl.object_no, &dl.object_offset, &xlen);
200 dl.file_offset -= dl.object_offset;
201 dl.object_size = ci->i_layout.object_size;
202 dl.block_size = ci->i_layout.stripe_unit;
203
204 /* block_offset = object_offset % block_size */
205 tmp = dl.object_offset;
206 dl.block_offset = do_div(tmp, dl.block_size);
207
208 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
209 ceph_ino(inode), dl.object_no);
210
211 oloc.pool = ci->i_layout.pool_id;
212 oloc.pool_ns = ceph_try_get_string(ci->i_layout.pool_ns);
213 ceph_oid_printf(&oid, "%s", dl.object_name);
214
215 r = ceph_object_locator_to_pg(osdc->osdmap, &oid, &oloc, &pgid);
216
217 ceph_oloc_destroy(&oloc);
218 if (r < 0) {
219 up_read(&osdc->lock);
220 return r;
221 }
222
223 dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid);
224 if (dl.osd >= 0) {
225 struct ceph_entity_addr *a =
226 ceph_osd_addr(osdc->osdmap, dl.osd);
227 if (a)
228 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
229 } else {
230 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
231 }
232 up_read(&osdc->lock);
233
234 /* send result back to user */
235 if (copy_to_user(arg, &dl, sizeof(dl)))
236 return -EFAULT;
237
238 return 0;
239 }
240
ceph_ioctl_lazyio(struct file * file)241 static long ceph_ioctl_lazyio(struct file *file)
242 {
243 struct ceph_file_info *fi = file->private_data;
244 struct inode *inode = file_inode(file);
245 struct ceph_inode_info *ci = ceph_inode(inode);
246 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
247
248 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
249 spin_lock(&ci->i_ceph_lock);
250 fi->fmode |= CEPH_FILE_MODE_LAZY;
251 ci->i_nr_by_mode[ffs(CEPH_FILE_MODE_LAZY)]++;
252 __ceph_touch_fmode(ci, mdsc, fi->fmode);
253 spin_unlock(&ci->i_ceph_lock);
254 dout("ioctl_layzio: file %p marked lazy\n", file);
255
256 ceph_check_caps(ci, 0, NULL);
257 } else {
258 dout("ioctl_layzio: file %p already lazy\n", file);
259 }
260 return 0;
261 }
262
ceph_ioctl_syncio(struct file * file)263 static long ceph_ioctl_syncio(struct file *file)
264 {
265 struct ceph_file_info *fi = file->private_data;
266
267 fi->flags |= CEPH_F_SYNC;
268 return 0;
269 }
270
ceph_ioctl(struct file * file,unsigned int cmd,unsigned long arg)271 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
272 {
273 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
274 switch (cmd) {
275 case CEPH_IOC_GET_LAYOUT:
276 return ceph_ioctl_get_layout(file, (void __user *)arg);
277
278 case CEPH_IOC_SET_LAYOUT:
279 return ceph_ioctl_set_layout(file, (void __user *)arg);
280
281 case CEPH_IOC_SET_LAYOUT_POLICY:
282 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
283
284 case CEPH_IOC_GET_DATALOC:
285 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
286
287 case CEPH_IOC_LAZYIO:
288 return ceph_ioctl_lazyio(file);
289
290 case CEPH_IOC_SYNCIO:
291 return ceph_ioctl_syncio(file);
292 }
293
294 return -ENOTTY;
295 }
296