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8f4e91de SW |
1 | #include <linux/in.h> |
2 | ||
8f4e91de | 3 | #include "super.h" |
3d14c5d2 YS |
4 | #include "mds_client.h" |
5 | #include <linux/ceph/ceph_debug.h> | |
6 | ||
7 | #include "ioctl.h" | |
8f4e91de SW |
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); | |
33d4909c SW |
29 | l.preferred_osd = |
30 | (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred); | |
8f4e91de SW |
31 | if (copy_to_user(arg, &l, sizeof(l))) |
32 | return -EFAULT; | |
33 | } | |
34 | ||
35 | return err; | |
36 | } | |
37 | ||
38 | static 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 = file->f_dentry->d_parent->d_inode; | |
3d14c5d2 | 42 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
8f4e91de SW |
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 = igrab(inode); | |
77 | req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL; | |
78 | ||
79 | req->r_args.setlayout.layout.fl_stripe_unit = | |
80 | cpu_to_le32(l.stripe_unit); | |
81 | req->r_args.setlayout.layout.fl_stripe_count = | |
82 | cpu_to_le32(l.stripe_count); | |
83 | req->r_args.setlayout.layout.fl_object_size = | |
84 | cpu_to_le32(l.object_size); | |
85 | req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool); | |
33d4909c SW |
86 | req->r_args.setlayout.layout.fl_pg_preferred = |
87 | cpu_to_le32(l.preferred_osd); | |
8f4e91de SW |
88 | |
89 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); | |
90 | ceph_mdsc_put_request(req); | |
91 | return err; | |
92 | } | |
93 | ||
571dba52 GF |
94 | /* |
95 | * Set a layout policy on a directory inode. All items in the tree | |
96 | * rooted at this inode will inherit this layout on creation, | |
97 | * (It doesn't apply retroactively ) | |
98 | * unless a subdirectory has its own layout policy. | |
99 | */ | |
100 | static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg) | |
101 | { | |
102 | struct inode *inode = file->f_dentry->d_inode; | |
103 | struct ceph_mds_request *req; | |
104 | struct ceph_ioctl_layout l; | |
105 | int err, i; | |
106 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; | |
107 | ||
108 | /* copy and validate */ | |
109 | if (copy_from_user(&l, arg, sizeof(l))) | |
110 | return -EFAULT; | |
111 | ||
112 | if ((l.object_size & ~PAGE_MASK) || | |
113 | (l.stripe_unit & ~PAGE_MASK) || | |
114 | !l.stripe_unit || | |
115 | (l.object_size && | |
116 | (unsigned)l.object_size % (unsigned)l.stripe_unit)) | |
117 | return -EINVAL; | |
118 | ||
119 | /* make sure it's a valid data pool */ | |
120 | if (l.data_pool > 0) { | |
121 | mutex_lock(&mdsc->mutex); | |
122 | err = -EINVAL; | |
123 | for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++) | |
124 | if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) { | |
125 | err = 0; | |
126 | break; | |
127 | } | |
128 | mutex_unlock(&mdsc->mutex); | |
129 | if (err) | |
130 | return err; | |
131 | } | |
132 | ||
133 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT, | |
134 | USE_AUTH_MDS); | |
135 | ||
136 | if (IS_ERR(req)) | |
137 | return PTR_ERR(req); | |
138 | req->r_inode = igrab(inode); | |
139 | ||
140 | req->r_args.setlayout.layout.fl_stripe_unit = | |
141 | cpu_to_le32(l.stripe_unit); | |
142 | req->r_args.setlayout.layout.fl_stripe_count = | |
143 | cpu_to_le32(l.stripe_count); | |
144 | req->r_args.setlayout.layout.fl_object_size = | |
145 | cpu_to_le32(l.object_size); | |
146 | req->r_args.setlayout.layout.fl_pg_pool = | |
147 | cpu_to_le32(l.data_pool); | |
148 | req->r_args.setlayout.layout.fl_pg_preferred = | |
149 | cpu_to_le32(l.preferred_osd); | |
150 | ||
151 | err = ceph_mdsc_do_request(mdsc, inode, req); | |
152 | ceph_mdsc_put_request(req); | |
153 | return err; | |
154 | } | |
155 | ||
8f4e91de SW |
156 | /* |
157 | * Return object name, size/offset information, and location (OSD | |
158 | * number, network address) for a given file offset. | |
159 | */ | |
160 | static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) | |
161 | { | |
162 | struct ceph_ioctl_dataloc dl; | |
163 | struct inode *inode = file->f_dentry->d_inode; | |
164 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 YS |
165 | struct ceph_osd_client *osdc = |
166 | &ceph_sb_to_client(inode->i_sb)->client->osdc; | |
8f4e91de SW |
167 | u64 len = 1, olen; |
168 | u64 tmp; | |
169 | struct ceph_object_layout ol; | |
51042122 | 170 | struct ceph_pg pgid; |
8f4e91de SW |
171 | |
172 | /* copy and validate */ | |
173 | if (copy_from_user(&dl, arg, sizeof(dl))) | |
174 | return -EFAULT; | |
175 | ||
176 | down_read(&osdc->map_sem); | |
177 | ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len, | |
178 | &dl.object_no, &dl.object_offset, &olen); | |
179 | dl.file_offset -= dl.object_offset; | |
180 | dl.object_size = ceph_file_layout_object_size(ci->i_layout); | |
181 | dl.block_size = ceph_file_layout_su(ci->i_layout); | |
182 | ||
183 | /* block_offset = object_offset % block_size */ | |
184 | tmp = dl.object_offset; | |
185 | dl.block_offset = do_div(tmp, dl.block_size); | |
186 | ||
187 | snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", | |
188 | ceph_ino(inode), dl.object_no); | |
189 | ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout, | |
190 | osdc->osdmap); | |
191 | ||
51042122 | 192 | pgid = ol.ol_pgid; |
8f4e91de SW |
193 | dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); |
194 | if (dl.osd >= 0) { | |
195 | struct ceph_entity_addr *a = | |
196 | ceph_osd_addr(osdc->osdmap, dl.osd); | |
197 | if (a) | |
198 | memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); | |
199 | } else { | |
200 | memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); | |
201 | } | |
202 | up_read(&osdc->map_sem); | |
203 | ||
204 | /* send result back to user */ | |
205 | if (copy_to_user(arg, &dl, sizeof(dl))) | |
206 | return -EFAULT; | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
8c6e9229 SW |
211 | static long ceph_ioctl_lazyio(struct file *file) |
212 | { | |
213 | struct ceph_file_info *fi = file->private_data; | |
214 | struct inode *inode = file->f_dentry->d_inode; | |
215 | struct ceph_inode_info *ci = ceph_inode(inode); | |
216 | ||
217 | if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { | |
218 | spin_lock(&inode->i_lock); | |
219 | ci->i_nr_by_mode[fi->fmode]--; | |
220 | fi->fmode |= CEPH_FILE_MODE_LAZY; | |
221 | ci->i_nr_by_mode[fi->fmode]++; | |
222 | spin_unlock(&inode->i_lock); | |
223 | dout("ioctl_layzio: file %p marked lazy\n", file); | |
224 | ||
225 | ceph_check_caps(ci, 0, NULL); | |
226 | } else { | |
227 | dout("ioctl_layzio: file %p already lazy\n", file); | |
228 | } | |
229 | return 0; | |
230 | } | |
231 | ||
8f4e91de SW |
232 | long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
233 | { | |
234 | dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); | |
235 | switch (cmd) { | |
236 | case CEPH_IOC_GET_LAYOUT: | |
237 | return ceph_ioctl_get_layout(file, (void __user *)arg); | |
238 | ||
239 | case CEPH_IOC_SET_LAYOUT: | |
240 | return ceph_ioctl_set_layout(file, (void __user *)arg); | |
241 | ||
571dba52 GF |
242 | case CEPH_IOC_SET_LAYOUT_POLICY: |
243 | return ceph_ioctl_set_layout_policy(file, (void __user *)arg); | |
244 | ||
8f4e91de SW |
245 | case CEPH_IOC_GET_DATALOC: |
246 | return ceph_ioctl_get_dataloc(file, (void __user *)arg); | |
8c6e9229 SW |
247 | |
248 | case CEPH_IOC_LAZYIO: | |
249 | return ceph_ioctl_lazyio(file); | |
8f4e91de | 250 | } |
571dba52 | 251 | |
8f4e91de SW |
252 | return -ENOTTY; |
253 | } |