]> git.proxmox.com Git - mirror_ubuntu-kernels.git/blame - fs/ceph/ioctl.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[mirror_ubuntu-kernels.git] / fs / ceph / ioctl.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
96c57ade 2#include <linux/ceph/ceph_debug.h>
8f4e91de
SW
3#include <linux/in.h>
4
8f4e91de 5#include "super.h"
3d14c5d2 6#include "mds_client.h"
3d14c5d2 7#include "ioctl.h"
8f4e91de
SW
8
9
10/*
11 * ioctls
12 */
13
14/*
15 * get and set the file layout
16 */
17static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
18{
496ad9aa 19 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
8f4e91de
SW
20 struct ceph_ioctl_layout l;
21 int err;
22
508b32d8 23 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);
8f4e91de 24 if (!err) {
7627151e
YZ
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;
24c149ad 29 l.preferred_osd = -1;
8f4e91de
SW
30 if (copy_to_user(arg, &l, sizeof(l)))
31 return -EFAULT;
32 }
33
34 return err;
35}
36
e49bf4c5
SW
37static long __validate_layout(struct ceph_mds_client *mdsc,
38 struct ceph_ioctl_layout *l)
39{
40 int i, err;
41
e49bf4c5
SW
42 /* validate striping parameters */
43 if ((l->object_size & ~PAGE_MASK) ||
44 (l->stripe_unit & ~PAGE_MASK) ||
0bc62284 45 ((unsigned)l->stripe_unit != 0 &&
45f2e081 46 ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
e49bf4c5
SW
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
8f4e91de
SW
64static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
65{
496ad9aa 66 struct inode *inode = file_inode(file);
3d14c5d2 67 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
8f4e91de
SW
68 struct ceph_mds_request *req;
69 struct ceph_ioctl_layout l;
496ad9aa 70 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
a35eca95 71 struct ceph_ioctl_layout nl;
e49bf4c5 72 int err;
8f4e91de 73
8f4e91de
SW
74 if (copy_from_user(&l, arg, sizeof(l)))
75 return -EFAULT;
76
a35eca95 77 /* validate changed params against current layout */
508b32d8 78 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);
702aeb1f 79 if (err)
a35eca95
GF
80 return err;
81
702aeb1f 82 memset(&nl, 0, sizeof(nl));
a35eca95
GF
83 if (l.stripe_count)
84 nl.stripe_count = l.stripe_count;
702aeb1f 85 else
7627151e 86 nl.stripe_count = ci->i_layout.stripe_count;
a35eca95
GF
87 if (l.stripe_unit)
88 nl.stripe_unit = l.stripe_unit;
702aeb1f 89 else
7627151e 90 nl.stripe_unit = ci->i_layout.stripe_unit;
a35eca95
GF
91 if (l.object_size)
92 nl.object_size = l.object_size;
702aeb1f 93 else
7627151e 94 nl.object_size = ci->i_layout.object_size;
a35eca95
GF
95 if (l.data_pool)
96 nl.data_pool = l.data_pool;
702aeb1f 97 else
7627151e 98 nl.data_pool = ci->i_layout.pool_id;
702aeb1f
SW
99
100 /* this is obsolete, and always -1 */
24c149ad 101 nl.preferred_osd = -1;
a35eca95 102
e49bf4c5
SW
103 err = __validate_layout(mdsc, &nl);
104 if (err)
105 return err;
8f4e91de
SW
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);
70b666c3
SW
111 req->r_inode = inode;
112 ihold(inode);
3bd58143
YZ
113 req->r_num_caps = 1;
114
8f4e91de
SW
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);
8f4e91de 124
752c8bdc 125 err = ceph_mdsc_do_request(mdsc, NULL, req);
8f4e91de
SW
126 ceph_mdsc_put_request(req);
127 return err;
128}
129
571dba52
GF
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 */
136static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
137{
496ad9aa 138 struct inode *inode = file_inode(file);
571dba52
GF
139 struct ceph_mds_request *req;
140 struct ceph_ioctl_layout l;
e49bf4c5 141 int err;
571dba52
GF
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
e49bf4c5
SW
148 err = __validate_layout(mdsc, &l);
149 if (err)
150 return err;
571dba52
GF
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);
70b666c3
SW
157 req->r_inode = inode;
158 ihold(inode);
3bd58143 159 req->r_num_caps = 1;
571dba52
GF
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);
571dba52
GF
169
170 err = ceph_mdsc_do_request(mdsc, inode, req);
171 ceph_mdsc_put_request(req);
172 return err;
173}
174
8f4e91de
SW
175/*
176 * Return object name, size/offset information, and location (OSD
177 * number, network address) for a given file offset.
178 */
179static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
180{
181 struct ceph_ioctl_dataloc dl;
496ad9aa 182 struct inode *inode = file_inode(file);
8f4e91de 183 struct ceph_inode_info *ci = ceph_inode(inode);
3d14c5d2
YS
184 struct ceph_osd_client *osdc =
185 &ceph_sb_to_client(inode->i_sb)->client->osdc;
7c13cb64 186 struct ceph_object_locator oloc;
281dbe5d 187 CEPH_DEFINE_OID_ONSTACK(oid);
8f4e91de
SW
188 u64 len = 1, olen;
189 u64 tmp;
51042122 190 struct ceph_pg pgid;
457712a0 191 int r;
8f4e91de
SW
192
193 /* copy and validate */
194 if (copy_from_user(&dl, arg, sizeof(dl)))
195 return -EFAULT;
196
5aea3dcd 197 down_read(&osdc->lock);
e8afad65 198 r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
457712a0
SW
199 &dl.object_no, &dl.object_offset,
200 &olen);
494ddd11 201 if (r < 0) {
5aea3dcd 202 up_read(&osdc->lock);
457712a0 203 return -EIO;
494ddd11 204 }
8f4e91de 205 dl.file_offset -= dl.object_offset;
7627151e
YZ
206 dl.object_size = ci->i_layout.object_size;
207 dl.block_size = ci->i_layout.stripe_unit;
8f4e91de
SW
208
209 /* block_offset = object_offset % block_size */
210 tmp = dl.object_offset;
211 dl.block_offset = do_div(tmp, dl.block_size);
212
213 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
214 ceph_ino(inode), dl.object_no);
41766f87 215
7627151e 216 oloc.pool = ci->i_layout.pool_id;
779fe0fb 217 oloc.pool_ns = ceph_try_get_string(ci->i_layout.pool_ns);
d30291b9 218 ceph_oid_printf(&oid, "%s", dl.object_name);
7c13cb64 219
d9591f5e 220 r = ceph_object_locator_to_pg(osdc->osdmap, &oid, &oloc, &pgid);
779fe0fb
YZ
221
222 ceph_oloc_destroy(&oloc);
2fbcbff1 223 if (r < 0) {
5aea3dcd 224 up_read(&osdc->lock);
2fbcbff1 225 return r;
226 }
8f4e91de 227
f81f1633 228 dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid);
8f4e91de
SW
229 if (dl.osd >= 0) {
230 struct ceph_entity_addr *a =
231 ceph_osd_addr(osdc->osdmap, dl.osd);
232 if (a)
233 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
234 } else {
235 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
236 }
5aea3dcd 237 up_read(&osdc->lock);
8f4e91de
SW
238
239 /* send result back to user */
240 if (copy_to_user(arg, &dl, sizeof(dl)))
241 return -EFAULT;
242
243 return 0;
244}
245
8c6e9229
SW
246static long ceph_ioctl_lazyio(struct file *file)
247{
248 struct ceph_file_info *fi = file->private_data;
496ad9aa 249 struct inode *inode = file_inode(file);
8c6e9229
SW
250 struct ceph_inode_info *ci = ceph_inode(inode);
251
252 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
be655596 253 spin_lock(&ci->i_ceph_lock);
8c6e9229 254 fi->fmode |= CEPH_FILE_MODE_LAZY;
774a6a11 255 ci->i_nr_by_mode[ffs(CEPH_FILE_MODE_LAZY)]++;
be655596 256 spin_unlock(&ci->i_ceph_lock);
8c6e9229
SW
257 dout("ioctl_layzio: file %p marked lazy\n", file);
258
259 ceph_check_caps(ci, 0, NULL);
260 } else {
261 dout("ioctl_layzio: file %p already lazy\n", file);
262 }
263 return 0;
264}
265
4918b6d1
SW
266static long ceph_ioctl_syncio(struct file *file)
267{
268 struct ceph_file_info *fi = file->private_data;
269
270 fi->flags |= CEPH_F_SYNC;
271 return 0;
272}
273
8f4e91de
SW
274long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
275{
276 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
277 switch (cmd) {
278 case CEPH_IOC_GET_LAYOUT:
279 return ceph_ioctl_get_layout(file, (void __user *)arg);
280
281 case CEPH_IOC_SET_LAYOUT:
282 return ceph_ioctl_set_layout(file, (void __user *)arg);
283
571dba52
GF
284 case CEPH_IOC_SET_LAYOUT_POLICY:
285 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
286
8f4e91de
SW
287 case CEPH_IOC_GET_DATALOC:
288 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
8c6e9229
SW
289
290 case CEPH_IOC_LAZYIO:
291 return ceph_ioctl_lazyio(file);
4918b6d1
SW
292
293 case CEPH_IOC_SYNCIO:
294 return ceph_ioctl_syncio(file);
8f4e91de 295 }
571dba52 296
8f4e91de
SW
297 return -ENOTTY;
298}