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authorSage Weil <sage@newdream.net>2009-10-06 14:31:14 -0400
committerSage Weil <sage@newdream.net>2009-10-06 14:31:14 -0400
commit8f4e91dee2a245e4be6942f4a8d83a769e13a47d (patch)
tree6bbb4ea1a42186a0d371dd5c1a1fd03e55f39dbf
parenta8e63b7d51cce4557ee7bcd8f51be5cae8547d20 (diff)
ceph: ioctls
A few Ceph ioctls for getting and setting file layout (striping) parameters, and learning the identity and network address of the OSD a given region of a file is stored on. Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat
-rw-r--r--Documentation/ioctl/ioctl-number.txt1
-rw-r--r--fs/ceph/ioctl.c157
-rw-r--r--fs/ceph/ioctl.h39
3 files changed, 197 insertions, 0 deletions
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 947374977ca5..91cfdd76131e 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -182,6 +182,7 @@ Code Seq# Include File Comments
182 <http://www.proximity.com.au/~brian/winradio/> 182 <http://www.proximity.com.au/~brian/winradio/>
1830x90 00 drivers/cdrom/sbpcd.h 1830x90 00 drivers/cdrom/sbpcd.h
1840x93 60-7F linux/auto_fs.h 1840x93 60-7F linux/auto_fs.h
1850x97 00-7F fs/ceph/ioctl.h Ceph file system
1850x99 00-0F 537-Addinboard driver 1860x99 00-0F 537-Addinboard driver
186 <mailto:buk@buks.ipn.de> 187 <mailto:buk@buks.ipn.de>
1870xA0 all linux/sdp/sdp.h Industrial Device Project 1880xA0 all linux/sdp/sdp.h Industrial Device Project
diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
new file mode 100644
index 000000000000..e4f99eff5d93
--- /dev/null
+++ b/fs/ceph/ioctl.c
@@ -0,0 +1,157 @@
1#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);
27 if (copy_to_user(arg, &l, sizeof(l)))
28 return -EFAULT;
29 }
30
31 return err;
32}
33
34static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
35{
36 struct inode *inode = file->f_dentry->d_inode;
37 struct inode *parent_inode = file->f_dentry->d_parent->d_inode;
38 struct ceph_mds_client *mdsc = &ceph_sb_to_client(inode->i_sb)->mdsc;
39 struct ceph_mds_request *req;
40 struct ceph_ioctl_layout l;
41 int err, i;
42
43 /* copy and validate */
44 if (copy_from_user(&l, arg, sizeof(l)))
45 return -EFAULT;
46
47 if ((l.object_size & ~PAGE_MASK) ||
48 (l.stripe_unit & ~PAGE_MASK) ||
49 !l.stripe_unit ||
50 (l.object_size &&
51 (unsigned)l.object_size % (unsigned)l.stripe_unit))
52 return -EINVAL;
53
54 /* make sure it's a valid data pool */
55 if (l.data_pool > 0) {
56 mutex_lock(&mdsc->mutex);
57 err = -EINVAL;
58 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
59 if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
60 err = 0;
61 break;
62 }
63 mutex_unlock(&mdsc->mutex);
64 if (err)
65 return err;
66 }
67
68 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
69 USE_AUTH_MDS);
70 if (IS_ERR(req))
71 return PTR_ERR(req);
72 req->r_inode = igrab(inode);
73 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
74
75 req->r_args.setlayout.layout.fl_stripe_unit =
76 cpu_to_le32(l.stripe_unit);
77 req->r_args.setlayout.layout.fl_stripe_count =
78 cpu_to_le32(l.stripe_count);
79 req->r_args.setlayout.layout.fl_object_size =
80 cpu_to_le32(l.object_size);
81 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
82 req->r_args.setlayout.layout.fl_pg_preferred = cpu_to_le32((s32)-1);
83
84 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
85 ceph_mdsc_put_request(req);
86 return err;
87}
88
89/*
90 * Return object name, size/offset information, and location (OSD
91 * number, network address) for a given file offset.
92 */
93static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
94{
95 struct ceph_ioctl_dataloc dl;
96 struct inode *inode = file->f_dentry->d_inode;
97 struct ceph_inode_info *ci = ceph_inode(inode);
98 struct ceph_osd_client *osdc = &ceph_client(inode->i_sb)->osdc;
99 u64 len = 1, olen;
100 u64 tmp;
101 struct ceph_object_layout ol;
102 union ceph_pg pgid;
103
104 /* copy and validate */
105 if (copy_from_user(&dl, arg, sizeof(dl)))
106 return -EFAULT;
107
108 down_read(&osdc->map_sem);
109 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len,
110 &dl.object_no, &dl.object_offset, &olen);
111 dl.file_offset -= dl.object_offset;
112 dl.object_size = ceph_file_layout_object_size(ci->i_layout);
113 dl.block_size = ceph_file_layout_su(ci->i_layout);
114
115 /* block_offset = object_offset % block_size */
116 tmp = dl.object_offset;
117 dl.block_offset = do_div(tmp, dl.block_size);
118
119 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
120 ceph_ino(inode), dl.object_no);
121 ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout,
122 osdc->osdmap);
123
124 pgid.pg64 = le64_to_cpu(ol.ol_pgid);
125 dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
126 if (dl.osd >= 0) {
127 struct ceph_entity_addr *a =
128 ceph_osd_addr(osdc->osdmap, dl.osd);
129 if (a)
130 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));
131 } else {
132 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));
133 }
134 up_read(&osdc->map_sem);
135
136 /* send result back to user */
137 if (copy_to_user(arg, &dl, sizeof(dl)))
138 return -EFAULT;
139
140 return 0;
141}
142
143long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
144{
145 dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
146 switch (cmd) {
147 case CEPH_IOC_GET_LAYOUT:
148 return ceph_ioctl_get_layout(file, (void __user *)arg);
149
150 case CEPH_IOC_SET_LAYOUT:
151 return ceph_ioctl_set_layout(file, (void __user *)arg);
152
153 case CEPH_IOC_GET_DATALOC:
154 return ceph_ioctl_get_dataloc(file, (void __user *)arg);
155 }
156 return -ENOTTY;
157}
diff --git a/fs/ceph/ioctl.h b/fs/ceph/ioctl.h
new file mode 100644
index 000000000000..3c511dab3730
--- /dev/null
+++ b/fs/ceph/ioctl.h
@@ -0,0 +1,39 @@
1#ifndef FS_CEPH_IOCTL_H
2#define FS_CEPH_IOCTL_H
3
4#include <linux/ioctl.h>
5#include <linux/types.h>
6
7#define CEPH_IOCTL_MAGIC 0x97
8
9/* just use u64 to align sanely on all archs */
10struct ceph_ioctl_layout {
11 __u64 stripe_unit, stripe_count, object_size;
12 __u64 data_pool;
13};
14
15#define CEPH_IOC_GET_LAYOUT _IOR(CEPH_IOCTL_MAGIC, 1, \
16 struct ceph_ioctl_layout)
17#define CEPH_IOC_SET_LAYOUT _IOW(CEPH_IOCTL_MAGIC, 2, \
18 struct ceph_ioctl_layout)
19
20/*
21 * Extract identity, address of the OSD and object storing a given
22 * file offset.
23 */
24struct ceph_ioctl_dataloc {
25 __u64 file_offset; /* in+out: file offset */
26 __u64 object_offset; /* out: offset in object */
27 __u64 object_no; /* out: object # */
28 __u64 object_size; /* out: object size */
29 char object_name[64]; /* out: object name */
30 __u64 block_offset; /* out: offset in block */
31 __u64 block_size; /* out: block length */
32 __s64 osd; /* out: osd # */
33 struct sockaddr_storage osd_addr; /* out: osd address */
34};
35
36#define CEPH_IOC_GET_DATALOC _IOWR(CEPH_IOCTL_MAGIC, 3, \
37 struct ceph_ioctl_dataloc)
38
39#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 11:26:54 -0500