blob: 8a5bcae6284631cc6f020c1f71e03b8eb6e0821e [file] [log] [blame]
Sage Weil8f4e91d2009-10-06 11:31:14 -07001#include <linux/in.h>
2
3#include "ioctl.h"
4#include "super.h"
5#include "ceph_debug.h"
6
7
8/*
9 * ioctls
10 */
11
12/*
13 * get and set the file layout
14 */
15static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
16{
17 struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode);
18 struct ceph_ioctl_layout l;
19 int err;
20
21 err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);
22 if (!err) {
23 l.stripe_unit = ceph_file_layout_su(ci->i_layout);
24 l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
25 l.object_size = ceph_file_layout_object_size(ci->i_layout);
26 l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
Sage Weil33d49092009-12-02 14:42:39 -080027 l.preferred_osd =
28 (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred);
Sage Weil8f4e91d2009-10-06 11:31:14 -070029 if (copy_to_user(arg, &l, sizeof(l)))
30 return -EFAULT;
31 }
32
33 return err;
34}
35
36static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
37{
38 struct inode *inode = file->f_dentry->d_inode;
39 struct inode *parent_inode = file->f_dentry->d_parent->d_inode;
40 struct ceph_mds_client *mdsc = &ceph_sb_to_client(inode->i_sb)->mdsc;
41 struct ceph_mds_request *req;
42 struct ceph_ioctl_layout l;
43 int err, i;
44
45 /* copy and validate */
46 if (copy_from_user(&l, arg, sizeof(l)))
47 return -EFAULT;
48
49 if ((l.object_size & ~PAGE_MASK) ||
50 (l.stripe_unit & ~PAGE_MASK) ||
51 !l.stripe_unit ||
52 (l.object_size &&
53 (unsigned)l.object_size % (unsigned)l.stripe_unit))
54 return -EINVAL;
55
56 /* make sure it's a valid data pool */
57 if (l.data_pool > 0) {
58 mutex_lock(&mdsc->mutex);
59 err = -EINVAL;
60 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
61 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
62 err = 0;
63 break;
64 }
65 mutex_unlock(&mdsc->mutex);
66 if (err)
67 return err;
68 }
69
70 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
71 USE_AUTH_MDS);
72 if (IS_ERR(req))
73 return PTR_ERR(req);
74 req->r_inode = igrab(inode);
75 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
76
77 req->r_args.setlayout.layout.fl_stripe_unit =
78 cpu_to_le32(l.stripe_unit);
79 req->r_args.setlayout.layout.fl_stripe_count =
80 cpu_to_le32(l.stripe_count);
81 req->r_args.setlayout.layout.fl_object_size =
82 cpu_to_le32(l.object_size);
83 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
Sage Weil33d49092009-12-02 14:42:39 -080084 req->r_args.setlayout.layout.fl_pg_preferred =
85 cpu_to_le32(l.preferred_osd);
Sage Weil8f4e91d2009-10-06 11:31:14 -070086
87 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
88 ceph_mdsc_put_request(req);
89 return err;
90}
91
92/*
93 * Return object name, size/offset information, and location (OSD
94 * number, network address) for a given file offset.
95 */
96static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
97{
98 struct ceph_ioctl_dataloc dl;
99 struct inode *inode = file->f_dentry->d_inode;
100 struct ceph_inode_info *ci = ceph_inode(inode);
101 struct ceph_osd_client *osdc = &ceph_client(inode->i_sb)->osdc;
102 u64 len = 1, olen;
103 u64 tmp;
104 struct ceph_object_layout ol;
Sage Weil51042122009-11-04 11:39:12 -0800105 struct ceph_pg pgid;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700106
107 /* copy and validate */
108 if (copy_from_user(&dl, arg, sizeof(dl)))
109 return -EFAULT;
110
111 down_read(&osdc->map_sem);
112 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
113 &dl.object_no, &dl.object_offset, &olen);
114 dl.file_offset -= dl.object_offset;
115 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
116 dl.block_size = ceph_file_layout_su(ci->i_layout);
117
118 /* block_offset = object_offset % block_size */
119 tmp = dl.object_offset;
120 dl.block_offset = do_div(tmp, dl.block_size);
121
122 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
123 ceph_ino(inode), dl.object_no);
124 ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout,
125 osdc->osdmap);
126
Sage Weil51042122009-11-04 11:39:12 -0800127 pgid = ol.ol_pgid;
Sage Weil8f4e91d2009-10-06 11:31:14 -0700128 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
129 if (dl.osd >= 0) {
130 struct ceph_entity_addr *a =
131 ceph_osd_addr(osdc->osdmap, dl.osd);
132 if (a)
133 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
134 } else {
135 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
136 }
137 up_read(&osdc->map_sem);
138
139 /* send result back to user */
140 if (copy_to_user(arg, &dl, sizeof(dl)))
141 return -EFAULT;
142
143 return 0;
144}
145
146long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
147{
148 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
149 switch (cmd) {
150 case CEPH_IOC_GET_LAYOUT:
151 return ceph_ioctl_get_layout(file, (void __user *)arg);
152
153 case CEPH_IOC_SET_LAYOUT:
154 return ceph_ioctl_set_layout(file, (void __user *)arg);
155
156 case CEPH_IOC_GET_DATALOC:
157 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
158 }
159 return -ENOTTY;
160}