blob: 4a989345b37bd368e62ede9ddc0032ff8e5b8fa4 [file] [log] [blame]
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{
Al Viro496ad9a2013-01-23 17:07:38 -050019 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
Sage Weil8f4e91d2009-10-06 11:31:14 -070020 struct ceph_ioctl_layout l;
21 int err;
22
Al Viro496ad9a2013-01-23 17:07:38 -050023 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
Sage Weil8f4e91d2009-10-06 11:31:14 -070024 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 Weil3469ac1a2012-05-07 15:33:36 -070029 l.preferred_osd = (s32)-1;
Sage Weil8f4e91d2009-10-06 11:31:14 -070030 if (copy_to_user(arg, &l, sizeof(l)))
31 return -EFAULT;
32 }
33
34 return err;
35}
36
Sage Weile49bf4c2012-05-07 15:34:35 -070037static long __validate_layout(struct ceph_mds_client *mdsc,
38 struct ceph_ioctl_layout *l)
39{
40 int i, err;
41
Sage Weile49bf4c2012-05-07 15:34:35 -070042 /* validate striping parameters */
43 if ((l->object_size & ~PAGE_MASK) ||
44 (l->stripe_unit & ~PAGE_MASK) ||
Sage Weil45f2e082012-08-21 12:11:51 -070045 (l->stripe_unit != 0 &&
46 ((unsigned)l->object_size % (unsigned)l->stripe_unit)))
Sage Weile49bf4c2012-05-07 15:34:35 -070047 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
Sage Weil8f4e91d2009-10-06 11:31:14 -070064static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
65{
Al Viro496ad9a2013-01-23 17:07:38 -050066 struct inode *inode = file_inode(file);
Sage Weil5f21c962011-07-26 11:30:29 -070067 struct inode *parent_inode;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070068 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
Sage Weil8f4e91d2009-10-06 11:31:14 -070069 struct ceph_mds_request *req;
70 struct ceph_ioctl_layout l;
Al Viro496ad9a2013-01-23 17:07:38 -050071 struct ceph_inode_info *ci = ceph_inode(file_inode(file));
Greg Farnuma35eca92011-08-25 12:43:06 -070072 struct ceph_ioctl_layout nl;
Sage Weile49bf4c2012-05-07 15:34:35 -070073 int err;
Sage Weil8f4e91d2009-10-06 11:31:14 -070074
Sage Weil8f4e91d2009-10-06 11:31:14 -070075 if (copy_from_user(&l, arg, sizeof(l)))
76 return -EFAULT;
77
Greg Farnuma35eca92011-08-25 12:43:06 -070078 /* validate changed params against current layout */
Al Viro496ad9a2013-01-23 17:07:38 -050079 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT);
Sage Weil702aeb12012-05-14 12:34:38 -070080 if (err)
Greg Farnuma35eca92011-08-25 12:43:06 -070081 return err;
82
Sage Weil702aeb12012-05-14 12:34:38 -070083 memset(&nl, 0, sizeof(nl));
Greg Farnuma35eca92011-08-25 12:43:06 -070084 if (l.stripe_count)
85 nl.stripe_count = l.stripe_count;
Sage Weil702aeb12012-05-14 12:34:38 -070086 else
87 nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
Greg Farnuma35eca92011-08-25 12:43:06 -070088 if (l.stripe_unit)
89 nl.stripe_unit = l.stripe_unit;
Sage Weil702aeb12012-05-14 12:34:38 -070090 else
91 nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
Greg Farnuma35eca92011-08-25 12:43:06 -070092 if (l.object_size)
93 nl.object_size = l.object_size;
Sage Weil702aeb12012-05-14 12:34:38 -070094 else
95 nl.object_size = ceph_file_layout_object_size(ci->i_layout);
Greg Farnuma35eca92011-08-25 12:43:06 -070096 if (l.data_pool)
97 nl.data_pool = l.data_pool;
Sage Weil702aeb12012-05-14 12:34:38 -070098 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);
Greg Farnuma35eca92011-08-25 12:43:06 -0700103
Sage Weile49bf4c2012-05-07 15:34:35 -0700104 err = __validate_layout(mdsc, &nl);
105 if (err)
106 return err;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700107
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);
Sage Weil70b666c2011-05-27 09:24:26 -0700112 req->r_inode = inode;
113 ihold(inode);
Sage Weil8f4e91d2009-10-06 11:31:14 -0700114 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);
Sage Weil8f4e91d2009-10-06 11:31:14 -0700123
Sage Weil5f21c962011-07-26 11:30:29 -0700124 parent_inode = ceph_get_dentry_parent_inode(file->f_dentry);
Sage Weil8f4e91d2009-10-06 11:31:14 -0700125 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
Sage Weil5f21c962011-07-26 11:30:29 -0700126 iput(parent_inode);
Sage Weil8f4e91d2009-10-06 11:31:14 -0700127 ceph_mdsc_put_request(req);
128 return err;
129}
130
131/*
Greg Farnum571dba52010-09-24 14:56:40 -0700132 * 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 */
137static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
138{
Al Viro496ad9a2013-01-23 17:07:38 -0500139 struct inode *inode = file_inode(file);
Greg Farnum571dba52010-09-24 14:56:40 -0700140 struct ceph_mds_request *req;
141 struct ceph_ioctl_layout l;
Sage Weile49bf4c2012-05-07 15:34:35 -0700142 int err;
Greg Farnum571dba52010-09-24 14:56:40 -0700143 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
Sage Weile49bf4c2012-05-07 15:34:35 -0700149 err = __validate_layout(mdsc, &l);
150 if (err)
151 return err;
Greg Farnum571dba52010-09-24 14:56:40 -0700152
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);
Sage Weil70b666c2011-05-27 09:24:26 -0700158 req->r_inode = inode;
159 ihold(inode);
Greg Farnum571dba52010-09-24 14:56:40 -0700160
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);
Greg Farnum571dba52010-09-24 14:56:40 -0700169
170 err = ceph_mdsc_do_request(mdsc, inode, req);
171 ceph_mdsc_put_request(req);
172 return err;
173}
174
175/*
Sage Weil8f4e91d2009-10-06 11:31:14 -0700176 * 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;
Al Viro496ad9a2013-01-23 17:07:38 -0500182 struct inode *inode = file_inode(file);
Sage Weil8f4e91d2009-10-06 11:31:14 -0700183 struct ceph_inode_info *ci = ceph_inode(inode);
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700184 struct ceph_osd_client *osdc =
185 &ceph_sb_to_client(inode->i_sb)->client->osdc;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700186 u64 len = 1, olen;
187 u64 tmp;
Sage Weil51042122009-11-04 11:39:12 -0800188 struct ceph_pg pgid;
Sage Weil457712a2012-09-24 21:04:57 -0700189 int r;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700190
191 /* copy and validate */
192 if (copy_from_user(&dl, arg, sizeof(dl)))
193 return -EFAULT;
194
195 down_read(&osdc->map_sem);
Alex Eldere8afad62012-11-14 09:38:19 -0600196 r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
Sage Weil457712a2012-09-24 21:04:57 -0700197 &dl.object_no, &dl.object_offset,
198 &olen);
199 if (r < 0)
200 return -EIO;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700201 dl.file_offset -= dl.object_offset;
202 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
203 dl.block_size = ceph_file_layout_su(ci->i_layout);
204
205 /* block_offset = object_offset % block_size */
206 tmp = dl.object_offset;
207 dl.block_offset = do_div(tmp, dl.block_size);
208
209 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
210 ceph_ino(inode), dl.object_no);
Sage Weil2169aea2013-02-25 16:13:08 -0800211 ceph_calc_object_layout(&pgid, dl.object_name, &ci->i_layout,
Sage Weil8f4e91d2009-10-06 11:31:14 -0700212 osdc->osdmap);
213
Sage Weil8f4e91d2009-10-06 11:31:14 -0700214 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
215 if (dl.osd >= 0) {
216 struct ceph_entity_addr *a =
217 ceph_osd_addr(osdc->osdmap, dl.osd);
218 if (a)
219 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
220 } else {
221 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
222 }
223 up_read(&osdc->map_sem);
224
225 /* send result back to user */
226 if (copy_to_user(arg, &dl, sizeof(dl)))
227 return -EFAULT;
228
229 return 0;
230}
231
Sage Weil8c6e9222010-04-16 09:53:43 -0700232static long ceph_ioctl_lazyio(struct file *file)
233{
234 struct ceph_file_info *fi = file->private_data;
Al Viro496ad9a2013-01-23 17:07:38 -0500235 struct inode *inode = file_inode(file);
Sage Weil8c6e9222010-04-16 09:53:43 -0700236 struct ceph_inode_info *ci = ceph_inode(inode);
237
238 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
Sage Weilbe655592011-11-30 09:47:09 -0800239 spin_lock(&ci->i_ceph_lock);
Sage Weil8c6e9222010-04-16 09:53:43 -0700240 ci->i_nr_by_mode[fi->fmode]--;
241 fi->fmode |= CEPH_FILE_MODE_LAZY;
242 ci->i_nr_by_mode[fi->fmode]++;
Sage Weilbe655592011-11-30 09:47:09 -0800243 spin_unlock(&ci->i_ceph_lock);
Sage Weil8c6e9222010-04-16 09:53:43 -0700244 dout("ioctl_layzio: file %p marked lazy\n", file);
245
246 ceph_check_caps(ci, 0, NULL);
247 } else {
248 dout("ioctl_layzio: file %p already lazy\n", file);
249 }
250 return 0;
251}
252
Sage Weil4918b6d2011-07-26 11:26:07 -0700253static long ceph_ioctl_syncio(struct file *file)
254{
255 struct ceph_file_info *fi = file->private_data;
256
257 fi->flags |= CEPH_F_SYNC;
258 return 0;
259}
260
Sage Weil8f4e91d2009-10-06 11:31:14 -0700261long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
262{
263 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
264 switch (cmd) {
265 case CEPH_IOC_GET_LAYOUT:
266 return ceph_ioctl_get_layout(file, (void __user *)arg);
267
268 case CEPH_IOC_SET_LAYOUT:
269 return ceph_ioctl_set_layout(file, (void __user *)arg);
270
Greg Farnum571dba52010-09-24 14:56:40 -0700271 case CEPH_IOC_SET_LAYOUT_POLICY:
272 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
273
Sage Weil8f4e91d2009-10-06 11:31:14 -0700274 case CEPH_IOC_GET_DATALOC:
275 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
Sage Weil8c6e9222010-04-16 09:53:43 -0700276
277 case CEPH_IOC_LAZYIO:
278 return ceph_ioctl_lazyio(file);
Sage Weil4918b6d2011-07-26 11:26:07 -0700279
280 case CEPH_IOC_SYNCIO:
281 return ceph_ioctl_syncio(file);
Sage Weil8f4e91d2009-10-06 11:31:14 -0700282 }
Greg Farnum571dba52010-09-24 14:56:40 -0700283
Sage Weil8f4e91d2009-10-06 11:31:14 -0700284 return -ENOTTY;
285}