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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 | */ | |
17 | static 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 = (s32)-1; | |
30 | if (copy_to_user(arg, &l, sizeof(l))) | |
31 | return -EFAULT; | |
32 | } | |
33 | ||
34 | return err; | |
35 | } | |
36 | ||
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 | (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 | ||
64 | static long ceph_ioctl_set_layout(struct file *file, void __user *arg) | |
65 | { | |
66 | struct inode *inode = file->f_dentry->d_inode; | |
67 | struct inode *parent_inode; | |
68 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; | |
69 | struct ceph_mds_request *req; | |
70 | struct ceph_ioctl_layout l; | |
71 | struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode); | |
72 | struct ceph_ioctl_layout nl; | |
73 | int err; | |
74 | ||
75 | if (copy_from_user(&l, arg, sizeof(l))) | |
76 | return -EFAULT; | |
77 | ||
78 | /* validate changed params against current layout */ | |
79 | err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT); | |
80 | if (err) | |
81 | return err; | |
82 | ||
83 | memset(&nl, 0, sizeof(nl)); | |
84 | if (l.stripe_count) | |
85 | nl.stripe_count = l.stripe_count; | |
86 | else | |
87 | nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout); | |
88 | if (l.stripe_unit) | |
89 | nl.stripe_unit = l.stripe_unit; | |
90 | else | |
91 | nl.stripe_unit = ceph_file_layout_su(ci->i_layout); | |
92 | if (l.object_size) | |
93 | nl.object_size = l.object_size; | |
94 | else | |
95 | nl.object_size = ceph_file_layout_object_size(ci->i_layout); | |
96 | if (l.data_pool) | |
97 | nl.data_pool = l.data_pool; | |
98 | else | |
99 | nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout); | |
100 | ||
101 | /* this is obsolete, and always -1 */ | |
102 | nl.preferred_osd = le64_to_cpu(-1); | |
103 | ||
104 | err = __validate_layout(mdsc, &nl); | |
105 | if (err) | |
106 | return err; | |
107 | ||
108 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT, | |
109 | USE_AUTH_MDS); | |
110 | if (IS_ERR(req)) | |
111 | return PTR_ERR(req); | |
112 | req->r_inode = inode; | |
113 | ihold(inode); | |
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 | parent_inode = ceph_get_dentry_parent_inode(file->f_dentry); | |
125 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); | |
126 | iput(parent_inode); | |
127 | ceph_mdsc_put_request(req); | |
128 | return err; | |
129 | } | |
130 | ||
131 | /* | |
132 | * Set a layout policy on a directory inode. All items in the tree | |
133 | * rooted at this inode will inherit this layout on creation, | |
134 | * (It doesn't apply retroactively ) | |
135 | * unless a subdirectory has its own layout policy. | |
136 | */ | |
137 | static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg) | |
138 | { | |
139 | struct inode *inode = file->f_dentry->d_inode; | |
140 | struct ceph_mds_request *req; | |
141 | struct ceph_ioctl_layout l; | |
142 | int err; | |
143 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; | |
144 | ||
145 | /* copy and validate */ | |
146 | if (copy_from_user(&l, arg, sizeof(l))) | |
147 | return -EFAULT; | |
148 | ||
149 | err = __validate_layout(mdsc, &l); | |
150 | if (err) | |
151 | return err; | |
152 | ||
153 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT, | |
154 | USE_AUTH_MDS); | |
155 | ||
156 | if (IS_ERR(req)) | |
157 | return PTR_ERR(req); | |
158 | req->r_inode = inode; | |
159 | ihold(inode); | |
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 | */ | |
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->f_dentry->d_inode; | |
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 | u64 len = 1, olen; | |
187 | u64 tmp; | |
188 | struct ceph_object_layout ol; | |
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 | return -EIO; | |
202 | dl.file_offset -= dl.object_offset; | |
203 | dl.object_size = ceph_file_layout_object_size(ci->i_layout); | |
204 | dl.block_size = ceph_file_layout_su(ci->i_layout); | |
205 | ||
206 | /* block_offset = object_offset % block_size */ | |
207 | tmp = dl.object_offset; | |
208 | dl.block_offset = do_div(tmp, dl.block_size); | |
209 | ||
210 | snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", | |
211 | ceph_ino(inode), dl.object_no); | |
212 | ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout, | |
213 | osdc->osdmap); | |
214 | ||
215 | pgid = ol.ol_pgid; | |
216 | dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); | |
217 | if (dl.osd >= 0) { | |
218 | struct ceph_entity_addr *a = | |
219 | ceph_osd_addr(osdc->osdmap, dl.osd); | |
220 | if (a) | |
221 | memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); | |
222 | } else { | |
223 | memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); | |
224 | } | |
225 | up_read(&osdc->map_sem); | |
226 | ||
227 | /* send result back to user */ | |
228 | if (copy_to_user(arg, &dl, sizeof(dl))) | |
229 | return -EFAULT; | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static long ceph_ioctl_lazyio(struct file *file) | |
235 | { | |
236 | struct ceph_file_info *fi = file->private_data; | |
237 | struct inode *inode = file->f_dentry->d_inode; | |
238 | struct ceph_inode_info *ci = ceph_inode(inode); | |
239 | ||
240 | if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { | |
241 | spin_lock(&ci->i_ceph_lock); | |
242 | ci->i_nr_by_mode[fi->fmode]--; | |
243 | fi->fmode |= CEPH_FILE_MODE_LAZY; | |
244 | ci->i_nr_by_mode[fi->fmode]++; | |
245 | spin_unlock(&ci->i_ceph_lock); | |
246 | dout("ioctl_layzio: file %p marked lazy\n", file); | |
247 | ||
248 | ceph_check_caps(ci, 0, NULL); | |
249 | } else { | |
250 | dout("ioctl_layzio: file %p already lazy\n", file); | |
251 | } | |
252 | return 0; | |
253 | } | |
254 | ||
255 | static long ceph_ioctl_syncio(struct file *file) | |
256 | { | |
257 | struct ceph_file_info *fi = file->private_data; | |
258 | ||
259 | fi->flags |= CEPH_F_SYNC; | |
260 | return 0; | |
261 | } | |
262 | ||
263 | long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
264 | { | |
265 | dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); | |
266 | switch (cmd) { | |
267 | case CEPH_IOC_GET_LAYOUT: | |
268 | return ceph_ioctl_get_layout(file, (void __user *)arg); | |
269 | ||
270 | case CEPH_IOC_SET_LAYOUT: | |
271 | return ceph_ioctl_set_layout(file, (void __user *)arg); | |
272 | ||
273 | case CEPH_IOC_SET_LAYOUT_POLICY: | |
274 | return ceph_ioctl_set_layout_policy(file, (void __user *)arg); | |
275 | ||
276 | case CEPH_IOC_GET_DATALOC: | |
277 | return ceph_ioctl_get_dataloc(file, (void __user *)arg); | |
278 | ||
279 | case CEPH_IOC_LAZYIO: | |
280 | return ceph_ioctl_lazyio(file); | |
281 | ||
282 | case CEPH_IOC_SYNCIO: | |
283 | return ceph_ioctl_syncio(file); | |
284 | } | |
285 | ||
286 | return -ENOTTY; | |
287 | } |