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1#include <linux/ceph/ceph_debug.h>
2#include <linux/in.h>
3
4#include "super.h"
5#include "mds_client.h"
6#include "ioctl.h"
7
8
9/*
10 * ioctls
11 */
12
13/*
14 * get and set the file layout
15 */
16static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
17{
18 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
19 struct ceph_ioctl_layout l;
20 int err;
21
22 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
23 if (!err) {
24 l.stripe_unit = ceph_file_layout_su(ci->i_layout);
25 l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
26 l.object_size = ceph_file_layout_object_size(ci->i_layout);
27 l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
28 l.preferred_osd = (s32)-1;
29 if (copy_to_user(arg, &l, sizeof(l)))
30 return -EFAULT;
31 }
32
33 return err;
34}
35
36static long __validate_layout(struct ceph_mds_client *mdsc,
37 struct ceph_ioctl_layout *l)
38{
39 int i, err;
40
41 /* validate striping parameters */
42 if ((l->object_size & ~PAGE_MASK) ||
43 (l->stripe_unit & ~PAGE_MASK) ||
44 (l->stripe_unit != 0 &&
45 ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
46 return -EINVAL;
47
48 /* make sure it's a valid data pool */
49 mutex_lock(&mdsc->mutex);
50 err = -EINVAL;
51 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
52 if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) {
53 err = 0;
54 break;
55 }
56 mutex_unlock(&mdsc->mutex);
57 if (err)
58 return err;
59
60 return 0;
61}
62
63static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
64{
65 struct inode *inode = file_inode(file);
66 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
67 struct ceph_mds_request *req;
68 struct ceph_ioctl_layout l;
69 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
70 struct ceph_ioctl_layout nl;
71 int err;
72
73 if (copy_from_user(&l, arg, sizeof(l)))
74 return -EFAULT;
75
76 /* validate changed params against current layout */
77 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
78 if (err)
79 return err;
80
81 memset(&nl, 0, sizeof(nl));
82 if (l.stripe_count)
83 nl.stripe_count = l.stripe_count;
84 else
85 nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
86 if (l.stripe_unit)
87 nl.stripe_unit = l.stripe_unit;
88 else
89 nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
90 if (l.object_size)
91 nl.object_size = l.object_size;
92 else
93 nl.object_size = ceph_file_layout_object_size(ci->i_layout);
94 if (l.data_pool)
95 nl.data_pool = l.data_pool;
96 else
97 nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout);
98
99 /* this is obsolete, and always -1 */
100 nl.preferred_osd = le64_to_cpu(-1);
101
102 err = __validate_layout(mdsc, &nl);
103 if (err)
104 return err;
105
106 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
107 USE_AUTH_MDS);
108 if (IS_ERR(req))
109 return PTR_ERR(req);
110 req->r_inode = inode;
111 ihold(inode);
112 req->r_num_caps = 1;
113
114 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
115
116 req->r_args.setlayout.layout.fl_stripe_unit =
117 cpu_to_le32(l.stripe_unit);
118 req->r_args.setlayout.layout.fl_stripe_count =
119 cpu_to_le32(l.stripe_count);
120 req->r_args.setlayout.layout.fl_object_size =
121 cpu_to_le32(l.object_size);
122 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
123
124 err = ceph_mdsc_do_request(mdsc, NULL, req);
125 ceph_mdsc_put_request(req);
126 return err;
127}
128
129/*
130 * Set a layout policy on a directory inode. All items in the tree
131 * rooted at this inode will inherit this layout on creation,
132 * (It doesn't apply retroactively )
133 * unless a subdirectory has its own layout policy.
134 */
135static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
136{
137 struct inode *inode = file_inode(file);
138 struct ceph_mds_request *req;
139 struct ceph_ioctl_layout l;
140 int err;
141 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
142
143 /* copy and validate */
144 if (copy_from_user(&l, arg, sizeof(l)))
145 return -EFAULT;
146
147 err = __validate_layout(mdsc, &l);
148 if (err)
149 return err;
150
151 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
152 USE_AUTH_MDS);
153
154 if (IS_ERR(req))
155 return PTR_ERR(req);
156 req->r_inode = inode;
157 ihold(inode);
158 req->r_num_caps = 1;
159
160 req->r_args.setlayout.layout.fl_stripe_unit =
161 cpu_to_le32(l.stripe_unit);
162 req->r_args.setlayout.layout.fl_stripe_count =
163 cpu_to_le32(l.stripe_count);
164 req->r_args.setlayout.layout.fl_object_size =
165 cpu_to_le32(l.object_size);
166 req->r_args.setlayout.layout.fl_pg_pool =
167 cpu_to_le32(l.data_pool);
168
169 err = ceph_mdsc_do_request(mdsc, inode, req);
170 ceph_mdsc_put_request(req);
171 return err;
172}
173
174/*
175 * Return object name, size/offset information, and location (OSD
176 * number, network address) for a given file offset.
177 */
178static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
179{
180 struct ceph_ioctl_dataloc dl;
181 struct inode *inode = file_inode(file);
182 struct ceph_inode_info *ci = ceph_inode(inode);
183 struct ceph_osd_client *osdc =
184 &ceph_sb_to_client(inode->i_sb)->client->osdc;
185 struct ceph_object_locator oloc;
186 struct ceph_object_id oid;
187 u64 len = 1, olen;
188 u64 tmp;
189 struct ceph_pg pgid;
190 int r;
191
192 /* copy and validate */
193 if (copy_from_user(&dl, arg, sizeof(dl)))
194 return -EFAULT;
195
196 down_read(&osdc->map_sem);
197 r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
198 &dl.object_no, &dl.object_offset,
199 &olen);
200 if (r < 0) {
201 up_read(&osdc->map_sem);
202 return -EIO;
203 }
204 dl.file_offset -= dl.object_offset;
205 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
206 dl.block_size = ceph_file_layout_su(ci->i_layout);
207
208 /* block_offset = object_offset % block_size */
209 tmp = dl.object_offset;
210 dl.block_offset = do_div(tmp, dl.block_size);
211
212 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
213 ceph_ino(inode), dl.object_no);
214
215 oloc.pool = ceph_file_layout_pg_pool(ci->i_layout);
216 ceph_oid_set_name(&oid, dl.object_name);
217
218 r = ceph_oloc_oid_to_pg(osdc->osdmap, &oloc, &oid, &pgid);
219 if (r < 0) {
220 up_read(&osdc->map_sem);
221 return r;
222 }
223
224 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
225 if (dl.osd >= 0) {
226 struct ceph_entity_addr *a =
227 ceph_osd_addr(osdc->osdmap, dl.osd);
228 if (a)
229 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
230 } else {
231 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
232 }
233 up_read(&osdc->map_sem);
234
235 /* send result back to user */
236 if (copy_to_user(arg, &dl, sizeof(dl)))
237 return -EFAULT;
238
239 return 0;
240}
241
242static long ceph_ioctl_lazyio(struct file *file)
243{
244 struct ceph_file_info *fi = file->private_data;
245 struct inode *inode = file_inode(file);
246 struct ceph_inode_info *ci = ceph_inode(inode);
247
248 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
249 spin_lock(&ci->i_ceph_lock);
250 ci->i_nr_by_mode[fi->fmode]--;
251 fi->fmode |= CEPH_FILE_MODE_LAZY;
252 ci->i_nr_by_mode[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
263static 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
271long 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}
1#include <linux/in.h>
2
3#include "super.h"
4#include "mds_client.h"
5#include <linux/ceph/ceph_debug.h>
6
7#include "ioctl.h"
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{
19 struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode);
20 struct ceph_ioctl_layout l;
21 int err;
22
23 err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);
24 if (!err) {
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 =
30 (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred);
31 if (copy_to_user(arg, &l, sizeof(l)))
32 return -EFAULT;
33 }
34
35 return err;
36}
37
38static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
39{
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 int err, i;
46
47 /* copy and validate */
48 if (copy_from_user(&l, arg, sizeof(l)))
49 return -EFAULT;
50
51 if ((l.object_size & ~PAGE_MASK) ||
52 (l.stripe_unit & ~PAGE_MASK) ||
53 !l.stripe_unit ||
54 (l.object_size &&
55 (unsigned)l.object_size % (unsigned)l.stripe_unit))
56 return -EINVAL;
57
58 /* make sure it's a valid data pool */
59 if (l.data_pool > 0) {
60 mutex_lock(&mdsc->mutex);
61 err = -EINVAL;
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) {
64 err = 0;
65 break;
66 }
67 mutex_unlock(&mdsc->mutex);
68 if (err)
69 return err;
70 }
71
72 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
73 USE_AUTH_MDS);
74 if (IS_ERR(req))
75 return PTR_ERR(req);
76 req->r_inode = inode;
77 ihold(inode);
78 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
79
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);
89
90 parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
91 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
92 iput(parent_inode);
93 ceph_mdsc_put_request(req);
94 return err;
95}
96
97/*
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.
102 */
103static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
104{
105 struct inode *inode = file->f_dentry->d_inode;
106 struct ceph_mds_request *req;
107 struct ceph_ioctl_layout l;
108 int err, i;
109 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
110
111 /* copy and validate */
112 if (copy_from_user(&l, arg, sizeof(l)))
113 return -EFAULT;
114
115 if ((l.object_size & ~PAGE_MASK) ||
116 (l.stripe_unit & ~PAGE_MASK) ||
117 !l.stripe_unit ||
118 (l.object_size &&
119 (unsigned)l.object_size % (unsigned)l.stripe_unit))
120 return -EINVAL;
121
122 /* make sure it's a valid data pool */
123 if (l.data_pool > 0) {
124 mutex_lock(&mdsc->mutex);
125 err = -EINVAL;
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) {
128 err = 0;
129 break;
130 }
131 mutex_unlock(&mdsc->mutex);
132 if (err)
133 return err;
134 }
135
136 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
137 USE_AUTH_MDS);
138
139 if (IS_ERR(req))
140 return PTR_ERR(req);
141 req->r_inode = inode;
142 ihold(inode);
143
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);
154
155 err = ceph_mdsc_do_request(mdsc, inode, req);
156 ceph_mdsc_put_request(req);
157 return err;
158}
159
160/*
161 * Return object name, size/offset information, and location (OSD
162 * number, network address) for a given file offset.
163 */
164static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
165{
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;
171 u64 len = 1, olen;
172 u64 tmp;
173 struct ceph_object_layout ol;
174 struct ceph_pg pgid;
175
176 /* copy and validate */
177 if (copy_from_user(&dl, arg, sizeof(dl)))
178 return -EFAULT;
179
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);
186
187 /* block_offset = object_offset % block_size */
188 tmp = dl.object_offset;
189 dl.block_offset = do_div(tmp, dl.block_size);
190
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,
194 osdc->osdmap);
195
196 pgid = ol.ol_pgid;
197 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
198 if (dl.osd >= 0) {
199 struct ceph_entity_addr *a =
200 ceph_osd_addr(osdc->osdmap, dl.osd);
201 if (a)
202 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
203 } else {
204 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
205 }
206 up_read(&osdc->map_sem);
207
208 /* send result back to user */
209 if (copy_to_user(arg, &dl, sizeof(dl)))
210 return -EFAULT;
211
212 return 0;
213}
214
215static long ceph_ioctl_lazyio(struct file *file)
216{
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);
220
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);
228
229 ceph_check_caps(ci, 0, NULL);
230 } else {
231 dout("ioctl_layzio: file %p already lazy\n", file);
232 }
233 return 0;
234}
235
236static long ceph_ioctl_syncio(struct file *file)
237{
238 struct ceph_file_info *fi = file->private_data;
239
240 fi->flags |= CEPH_F_SYNC;
241 return 0;
242}
243
244long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
245{
246 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
247 switch (cmd) {
248 case CEPH_IOC_GET_LAYOUT:
249 return ceph_ioctl_get_layout(file, (void __user *)arg);
250
251 case CEPH_IOC_SET_LAYOUT:
252 return ceph_ioctl_set_layout(file, (void __user *)arg);
253
254 case CEPH_IOC_SET_LAYOUT_POLICY:
255 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
256
257 case CEPH_IOC_GET_DATALOC:
258 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
259
260 case CEPH_IOC_LAZYIO:
261 return ceph_ioctl_lazyio(file);
262
263 case CEPH_IOC_SYNCIO:
264 return ceph_ioctl_syncio(file);
265 }
266
267 return -ENOTTY;
268}