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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 | ||
94 | /* | |
95 | * Return object name, size/offset information, and location (OSD | |
96 | * number, network address) for a given file offset. | |
97 | */ | |
98 | static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) | |
99 | { | |
100 | struct ceph_ioctl_dataloc dl; | |
101 | struct inode *inode = file->f_dentry->d_inode; | |
102 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 YS |
103 | struct ceph_osd_client *osdc = |
104 | &ceph_sb_to_client(inode->i_sb)->client->osdc; | |
8f4e91de SW |
105 | u64 len = 1, olen; |
106 | u64 tmp; | |
107 | struct ceph_object_layout ol; | |
51042122 | 108 | struct ceph_pg pgid; |
8f4e91de SW |
109 | |
110 | /* copy and validate */ | |
111 | if (copy_from_user(&dl, arg, sizeof(dl))) | |
112 | return -EFAULT; | |
113 | ||
114 | down_read(&osdc->map_sem); | |
115 | ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len, | |
116 | &dl.object_no, &dl.object_offset, &olen); | |
117 | dl.file_offset -= dl.object_offset; | |
118 | dl.object_size = ceph_file_layout_object_size(ci->i_layout); | |
119 | dl.block_size = ceph_file_layout_su(ci->i_layout); | |
120 | ||
121 | /* block_offset = object_offset % block_size */ | |
122 | tmp = dl.object_offset; | |
123 | dl.block_offset = do_div(tmp, dl.block_size); | |
124 | ||
125 | snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", | |
126 | ceph_ino(inode), dl.object_no); | |
127 | ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout, | |
128 | osdc->osdmap); | |
129 | ||
51042122 | 130 | pgid = ol.ol_pgid; |
8f4e91de SW |
131 | dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); |
132 | if (dl.osd >= 0) { | |
133 | struct ceph_entity_addr *a = | |
134 | ceph_osd_addr(osdc->osdmap, dl.osd); | |
135 | if (a) | |
136 | memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); | |
137 | } else { | |
138 | memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); | |
139 | } | |
140 | up_read(&osdc->map_sem); | |
141 | ||
142 | /* send result back to user */ | |
143 | if (copy_to_user(arg, &dl, sizeof(dl))) | |
144 | return -EFAULT; | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
8c6e9229 SW |
149 | static long ceph_ioctl_lazyio(struct file *file) |
150 | { | |
151 | struct ceph_file_info *fi = file->private_data; | |
152 | struct inode *inode = file->f_dentry->d_inode; | |
153 | struct ceph_inode_info *ci = ceph_inode(inode); | |
154 | ||
155 | if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { | |
156 | spin_lock(&inode->i_lock); | |
157 | ci->i_nr_by_mode[fi->fmode]--; | |
158 | fi->fmode |= CEPH_FILE_MODE_LAZY; | |
159 | ci->i_nr_by_mode[fi->fmode]++; | |
160 | spin_unlock(&inode->i_lock); | |
161 | dout("ioctl_layzio: file %p marked lazy\n", file); | |
162 | ||
163 | ceph_check_caps(ci, 0, NULL); | |
164 | } else { | |
165 | dout("ioctl_layzio: file %p already lazy\n", file); | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
8f4e91de SW |
170 | long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
171 | { | |
172 | dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); | |
173 | switch (cmd) { | |
174 | case CEPH_IOC_GET_LAYOUT: | |
175 | return ceph_ioctl_get_layout(file, (void __user *)arg); | |
176 | ||
177 | case CEPH_IOC_SET_LAYOUT: | |
178 | return ceph_ioctl_set_layout(file, (void __user *)arg); | |
179 | ||
180 | case CEPH_IOC_GET_DATALOC: | |
181 | return ceph_ioctl_get_dataloc(file, (void __user *)arg); | |
8c6e9229 SW |
182 | |
183 | case CEPH_IOC_LAZYIO: | |
184 | return ceph_ioctl_lazyio(file); | |
8f4e91de SW |
185 | } |
186 | return -ENOTTY; | |
187 | } |