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Sage Weil8f4e91d2009-10-06 11:31:14 -07001#include <linux/in.h>
2
Sage Weil8f4e91d2009-10-06 11:31:14 -07003#include "super.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07004#include "mds_client.h"
5#include <linux/ceph/ceph_debug.h>
6
7#include "ioctl.h"
Sage Weil8f4e91d2009-10-06 11:31:14 -07008
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);
Sage Weil33d49092009-12-02 14:42:39 -080029 l.preferred_osd =
30 (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred);
Sage Weil8f4e91d2009-10-06 11:31:14 -070031 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;
Sage Weil5f21c962011-07-26 11:30:29 -070041 struct inode *parent_inode;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070042 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
Sage Weil8f4e91d2009-10-06 11:31:14 -070043 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);
Sage Weil70b666c2011-05-27 09:24:26 -070076 req->r_inode = inode;
77 ihold(inode);
Sage Weil8f4e91d2009-10-06 11:31:14 -070078 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);
Sage Weil33d49092009-12-02 14:42:39 -080087 req->r_args.setlayout.layout.fl_pg_preferred =
88 cpu_to_le32(l.preferred_osd);
Sage Weil8f4e91d2009-10-06 11:31:14 -070089
Sage Weil5f21c962011-07-26 11:30:29 -070090 parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
Sage Weil8f4e91d2009-10-06 11:31:14 -070091 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
Sage Weil5f21c962011-07-26 11:30:29 -070092 iput(parent_inode);
Sage Weil8f4e91d2009-10-06 11:31:14 -070093 ceph_mdsc_put_request(req);
94 return err;
95}
96
97/*
Greg Farnum571dba52010-09-24 14:56:40 -070098 * 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);
Sage Weil70b666c2011-05-27 09:24:26 -0700141 req->r_inode = inode;
142 ihold(inode);
Greg Farnum571dba52010-09-24 14:56:40 -0700143
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/*
Sage Weil8f4e91d2009-10-06 11:31:14 -0700161 * 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);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700169 struct ceph_osd_client *osdc =
170 &ceph_sb_to_client(inode->i_sb)->client->osdc;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700171 u64 len = 1, olen;
172 u64 tmp;
173 struct ceph_object_layout ol;
Sage Weil51042122009-11-04 11:39:12 -0800174 struct ceph_pg pgid;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700175
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
Sage Weil51042122009-11-04 11:39:12 -0800196 pgid = ol.ol_pgid;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700197 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
Sage Weil8c6e9222010-04-16 09:53:43 -0700215static 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
Sage Weil4918b6d2011-07-26 11:26:07 -0700236static 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
Sage Weil8f4e91d2009-10-06 11:31:14 -0700244long 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
Greg Farnum571dba52010-09-24 14:56:40 -0700254 case CEPH_IOC_SET_LAYOUT_POLICY:
255 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
256
Sage Weil8f4e91d2009-10-06 11:31:14 -0700257 case CEPH_IOC_GET_DATALOC:
258 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
Sage Weil8c6e9222010-04-16 09:53:43 -0700259
260 case CEPH_IOC_LAZYIO:
261 return ceph_ioctl_lazyio(file);
Sage Weil4918b6d2011-07-26 11:26:07 -0700262
263 case CEPH_IOC_SYNCIO:
264 return ceph_ioctl_syncio(file);
Sage Weil8f4e91d2009-10-06 11:31:14 -0700265 }
Greg Farnum571dba52010-09-24 14:56:40 -0700266
Sage Weil8f4e91d2009-10-06 11:31:14 -0700267 return -ENOTTY;
268}