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-rw-r--r--fs/exofs/Kbuild16
-rw-r--r--fs/exofs/Kconfig13
-rw-r--r--fs/exofs/common.h184
-rw-r--r--fs/exofs/exofs.h127
-rw-r--r--fs/exofs/osd.c153
5 files changed, 493 insertions, 0 deletions
diff --git a/fs/exofs/Kbuild b/fs/exofs/Kbuild
new file mode 100644
index 000000000000..36d23ca79a58
--- /dev/null
+++ b/fs/exofs/Kbuild
@@ -0,0 +1,16 @@
1#
2# Kbuild for the EXOFS module
3#
4# Copyright (C) 2008 Panasas Inc. All rights reserved.
5#
6# Authors:
7# Boaz Harrosh <bharrosh@panasas.com>
8#
9# This program is free software; you can redistribute it and/or modify
10# it under the terms of the GNU General Public License version 2
11#
12# Kbuild - Gets included from the Kernels Makefile and build system
13#
14
15exofs-y := osd.o
16obj-$(CONFIG_EXOFS_FS) += exofs.o
diff --git a/fs/exofs/Kconfig b/fs/exofs/Kconfig
new file mode 100644
index 000000000000..86194b2f799d
--- /dev/null
+++ b/fs/exofs/Kconfig
@@ -0,0 +1,13 @@
1config EXOFS_FS
2 tristate "exofs: OSD based file system support"
3 depends on SCSI_OSD_ULD
4 help
5 EXOFS is a file system that uses an OSD storage device,
6 as its backing storage.
7
8# Debugging-related stuff
9config EXOFS_DEBUG
10 bool "Enable debugging"
11 depends on EXOFS_FS
12 help
13 This option enables EXOFS debug prints.
diff --git a/fs/exofs/common.h b/fs/exofs/common.h
new file mode 100644
index 000000000000..b1512c4bb8c7
--- /dev/null
+++ b/fs/exofs/common.h
@@ -0,0 +1,184 @@
1/*
2 * common.h - Common definitions for both Kernel and user-mode utilities
3 *
4 * Copyright (C) 2005, 2006
5 * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
6 * Copyright (C) 2005, 2006
7 * International Business Machines
8 * Copyright (C) 2008, 2009
9 * Boaz Harrosh <bharrosh@panasas.com>
10 *
11 * Copyrights for code taken from ext2:
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise Pascal
15 * Universite Pierre et Marie Curie (Paris VI)
16 * from
17 * linux/fs/minix/inode.c
18 * Copyright (C) 1991, 1992 Linus Torvalds
19 *
20 * This file is part of exofs.
21 *
22 * exofs is free software; you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License as published by
24 * the Free Software Foundation. Since it is based on ext2, and the only
25 * valid version of GPL for the Linux kernel is version 2, the only valid
26 * version of GPL for exofs is version 2.
27 *
28 * exofs is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 * GNU General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public License
34 * along with exofs; if not, write to the Free Software
35 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
36 */
37
38#ifndef __EXOFS_COM_H__
39#define __EXOFS_COM_H__
40
41#include <linux/types.h>
42
43#include <scsi/osd_attributes.h>
44#include <scsi/osd_initiator.h>
45#include <scsi/osd_sec.h>
46
47/****************************************************************************
48 * Object ID related defines
49 * NOTE: inode# = object ID - EXOFS_OBJ_OFF
50 ****************************************************************************/
51#define EXOFS_MIN_PID 0x10000 /* Smallest partition ID */
52#define EXOFS_OBJ_OFF 0x10000 /* offset for objects */
53#define EXOFS_SUPER_ID 0x10000 /* object ID for on-disk superblock */
54#define EXOFS_ROOT_ID 0x10002 /* object ID for root directory */
55
56/* exofs Application specific page/attribute */
57# define EXOFS_APAGE_FS_DATA (OSD_APAGE_APP_DEFINED_FIRST + 3)
58# define EXOFS_ATTR_INODE_DATA 1
59
60/*
61 * The maximum number of files we can have is limited by the size of the
62 * inode number. This is the largest object ID that the file system supports.
63 * Object IDs 0, 1, and 2 are always in use (see above defines).
64 */
65enum {
66 EXOFS_MAX_INO_ID = (sizeof(ino_t) * 8 == 64) ? ULLONG_MAX :
67 (1ULL << (sizeof(ino_t) * 8ULL - 1ULL)),
68 EXOFS_MAX_ID = (EXOFS_MAX_INO_ID - 1 - EXOFS_OBJ_OFF),
69};
70
71/****************************************************************************
72 * Misc.
73 ****************************************************************************/
74#define EXOFS_BLKSHIFT 12
75#define EXOFS_BLKSIZE (1UL << EXOFS_BLKSHIFT)
76
77/****************************************************************************
78 * superblock-related things
79 ****************************************************************************/
80#define EXOFS_SUPER_MAGIC 0x5DF5
81
82/*
83 * The file system control block - stored in an object's data (mainly, the one
84 * with ID EXOFS_SUPER_ID). This is where the in-memory superblock is stored
85 * on disk. Right now it just has a magic value, which is basically a sanity
86 * check on our ability to communicate with the object store.
87 */
88struct exofs_fscb {
89 __le64 s_nextid; /* Highest object ID used */
90 __le32 s_numfiles; /* Number of files on fs */
91 __le16 s_magic; /* Magic signature */
92 __le16 s_newfs; /* Non-zero if this is a new fs */
93};
94
95/****************************************************************************
96 * inode-related things
97 ****************************************************************************/
98#define EXOFS_IDATA 5
99
100/*
101 * The file control block - stored in an object's attributes. This is where
102 * the in-memory inode is stored on disk.
103 */
104struct exofs_fcb {
105 __le64 i_size; /* Size of the file */
106 __le16 i_mode; /* File mode */
107 __le16 i_links_count; /* Links count */
108 __le32 i_uid; /* Owner Uid */
109 __le32 i_gid; /* Group Id */
110 __le32 i_atime; /* Access time */
111 __le32 i_ctime; /* Creation time */
112 __le32 i_mtime; /* Modification time */
113 __le32 i_flags; /* File flags (unused for now)*/
114 __le32 i_generation; /* File version (for NFS) */
115 __le32 i_data[EXOFS_IDATA]; /* Short symlink names and device #s */
116};
117
118#define EXOFS_INO_ATTR_SIZE sizeof(struct exofs_fcb)
119
120/* This is the Attribute the fcb is stored in */
121static const struct __weak osd_attr g_attr_inode_data = ATTR_DEF(
122 EXOFS_APAGE_FS_DATA,
123 EXOFS_ATTR_INODE_DATA,
124 EXOFS_INO_ATTR_SIZE);
125
126/****************************************************************************
127 * dentry-related things
128 ****************************************************************************/
129#define EXOFS_NAME_LEN 255
130
131/*
132 * The on-disk directory entry
133 */
134struct exofs_dir_entry {
135 __le64 inode_no; /* inode number */
136 __le16 rec_len; /* directory entry length */
137 u8 name_len; /* name length */
138 u8 file_type; /* umm...file type */
139 char name[EXOFS_NAME_LEN]; /* file name */
140};
141
142enum {
143 EXOFS_FT_UNKNOWN,
144 EXOFS_FT_REG_FILE,
145 EXOFS_FT_DIR,
146 EXOFS_FT_CHRDEV,
147 EXOFS_FT_BLKDEV,
148 EXOFS_FT_FIFO,
149 EXOFS_FT_SOCK,
150 EXOFS_FT_SYMLINK,
151 EXOFS_FT_MAX
152};
153
154#define EXOFS_DIR_PAD 4
155#define EXOFS_DIR_ROUND (EXOFS_DIR_PAD - 1)
156#define EXOFS_DIR_REC_LEN(name_len) \
157 (((name_len) + offsetof(struct exofs_dir_entry, name) + \
158 EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND)
159
160/*************************
161 * function declarations *
162 *************************/
163/* osd.c */
164void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
165 const struct osd_obj_id *obj);
166
167int exofs_check_ok_resid(struct osd_request *or, u64 *in_resid, u64 *out_resid);
168static inline int exofs_check_ok(struct osd_request *or)
169{
170 return exofs_check_ok_resid(or, NULL, NULL);
171}
172int exofs_sync_op(struct osd_request *or, int timeout, u8 *cred);
173int exofs_async_op(struct osd_request *or,
174 osd_req_done_fn *async_done, void *caller_context, u8 *cred);
175
176int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr);
177
178int osd_req_read_kern(struct osd_request *or,
179 const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
180
181int osd_req_write_kern(struct osd_request *or,
182 const struct osd_obj_id *obj, u64 offset, void *buff, u64 len);
183
184#endif /*ifndef __EXOFS_COM_H__*/
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
new file mode 100644
index 000000000000..365376d3f72d
--- /dev/null
+++ b/fs/exofs/exofs.h
@@ -0,0 +1,127 @@
1/*
2 * Copyright (C) 2005, 2006
3 * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
4 * Copyright (C) 2005, 2006
5 * International Business Machines
6 * Copyright (C) 2008, 2009
7 * Boaz Harrosh <bharrosh@panasas.com>
8 *
9 * Copyrights for code taken from ext2:
10 * Copyright (C) 1992, 1993, 1994, 1995
11 * Remy Card (card@masi.ibp.fr)
12 * Laboratoire MASI - Institut Blaise Pascal
13 * Universite Pierre et Marie Curie (Paris VI)
14 * from
15 * linux/fs/minix/inode.c
16 * Copyright (C) 1991, 1992 Linus Torvalds
17 *
18 * This file is part of exofs.
19 *
20 * exofs is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation. Since it is based on ext2, and the only
23 * valid version of GPL for the Linux kernel is version 2, the only valid
24 * version of GPL for exofs is version 2.
25 *
26 * exofs is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
30 *
31 * You should have received a copy of the GNU General Public License
32 * along with exofs; if not, write to the Free Software
33 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34 */
35
36#include <linux/fs.h>
37#include <linux/time.h>
38#include "common.h"
39
40#ifndef __EXOFS_H__
41#define __EXOFS_H__
42
43#define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
44
45#ifdef CONFIG_EXOFS_DEBUG
46#define EXOFS_DBGMSG(fmt, a...) \
47 printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a)
48#else
49#define EXOFS_DBGMSG(fmt, a...) \
50 do { if (0) printk(fmt, ##a); } while (0)
51#endif
52
53/* u64 has problems with printk this will cast it to unsigned long long */
54#define _LLU(x) (unsigned long long)(x)
55
56/*
57 * our extension to the in-memory superblock
58 */
59struct exofs_sb_info {
60 struct osd_dev *s_dev; /* returned by get_osd_dev */
61 osd_id s_pid; /* partition ID of file system*/
62 int s_timeout; /* timeout for OSD operations */
63 uint64_t s_nextid; /* highest object ID used */
64 uint32_t s_numfiles; /* number of files on fs */
65 spinlock_t s_next_gen_lock; /* spinlock for gen # update */
66 u32 s_next_generation; /* next gen # to use */
67 atomic_t s_curr_pending; /* number of pending commands */
68 uint8_t s_cred[OSD_CAP_LEN]; /* all-powerful credential */
69};
70
71/*
72 * our extension to the in-memory inode
73 */
74struct exofs_i_info {
75 unsigned long i_flags; /* various atomic flags */
76 uint32_t i_data[EXOFS_IDATA];/*short symlink names and device #s*/
77 uint32_t i_dir_start_lookup; /* which page to start lookup */
78 wait_queue_head_t i_wq; /* wait queue for inode */
79 uint64_t i_commit_size; /* the object's written length */
80 uint8_t i_cred[OSD_CAP_LEN];/* all-powerful credential */
81 struct inode vfs_inode; /* normal in-memory inode */
82};
83
84/*
85 * our inode flags
86 */
87#define OBJ_2BCREATED 0 /* object will be created soon*/
88#define OBJ_CREATED 1 /* object has been created on the osd*/
89
90static inline int obj_2bcreated(struct exofs_i_info *oi)
91{
92 return test_bit(OBJ_2BCREATED, &oi->i_flags);
93}
94
95static inline void set_obj_2bcreated(struct exofs_i_info *oi)
96{
97 set_bit(OBJ_2BCREATED, &oi->i_flags);
98}
99
100static inline int obj_created(struct exofs_i_info *oi)
101{
102 return test_bit(OBJ_CREATED, &oi->i_flags);
103}
104
105static inline void set_obj_created(struct exofs_i_info *oi)
106{
107 set_bit(OBJ_CREATED, &oi->i_flags);
108}
109
110int __exofs_wait_obj_created(struct exofs_i_info *oi);
111static inline int wait_obj_created(struct exofs_i_info *oi)
112{
113 if (likely(obj_created(oi)))
114 return 0;
115
116 return __exofs_wait_obj_created(oi);
117}
118
119/*
120 * get to our inode from the vfs inode
121 */
122static inline struct exofs_i_info *exofs_i(struct inode *inode)
123{
124 return container_of(inode, struct exofs_i_info, vfs_inode);
125}
126
127#endif
diff --git a/fs/exofs/osd.c b/fs/exofs/osd.c
new file mode 100644
index 000000000000..b249ae97fb15
--- /dev/null
+++ b/fs/exofs/osd.c
@@ -0,0 +1,153 @@
1/*
2 * Copyright (C) 2005, 2006
3 * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
4 * Copyright (C) 2005, 2006
5 * International Business Machines
6 * Copyright (C) 2008, 2009
7 * Boaz Harrosh <bharrosh@panasas.com>
8 *
9 * This file is part of exofs.
10 *
11 * exofs is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation. Since it is based on ext2, and the only
14 * valid version of GPL for the Linux kernel is version 2, the only valid
15 * version of GPL for exofs is version 2.
16 *
17 * exofs is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with exofs; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 */
26
27#include <scsi/scsi_device.h>
28#include <scsi/osd_sense.h>
29
30#include "exofs.h"
31
32int exofs_check_ok_resid(struct osd_request *or, u64 *in_resid, u64 *out_resid)
33{
34 struct osd_sense_info osi;
35 int ret = osd_req_decode_sense(or, &osi);
36
37 if (ret) { /* translate to Linux codes */
38 if (osi.additional_code == scsi_invalid_field_in_cdb) {
39 if (osi.cdb_field_offset == OSD_CFO_STARTING_BYTE)
40 ret = -EFAULT;
41 if (osi.cdb_field_offset == OSD_CFO_OBJECT_ID)
42 ret = -ENOENT;
43 else
44 ret = -EINVAL;
45 } else if (osi.additional_code == osd_quota_error)
46 ret = -ENOSPC;
47 else
48 ret = -EIO;
49 }
50
51 /* FIXME: should be include in osd_sense_info */
52 if (in_resid)
53 *in_resid = or->in.req ? or->in.req->data_len : 0;
54
55 if (out_resid)
56 *out_resid = or->out.req ? or->out.req->data_len : 0;
57
58 return ret;
59}
60
61void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
62{
63 osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
64}
65
66/*
67 * Perform a synchronous OSD operation.
68 */
69int exofs_sync_op(struct osd_request *or, int timeout, uint8_t *credential)
70{
71 int ret;
72
73 or->timeout = timeout;
74 ret = osd_finalize_request(or, 0, credential, NULL);
75 if (ret) {
76 EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
77 return ret;
78 }
79
80 ret = osd_execute_request(or);
81
82 if (ret)
83 EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
84 /* osd_req_decode_sense(or, ret); */
85 return ret;
86}
87
88/*
89 * Perform an asynchronous OSD operation.
90 */
91int exofs_async_op(struct osd_request *or, osd_req_done_fn *async_done,
92 void *caller_context, u8 *cred)
93{
94 int ret;
95
96 ret = osd_finalize_request(or, 0, cred, NULL);
97 if (ret) {
98 EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
99 return ret;
100 }
101
102 ret = osd_execute_request_async(or, async_done, caller_context);
103
104 if (ret)
105 EXOFS_DBGMSG("osd_execute_request_async() => %d\n", ret);
106 return ret;
107}
108
109int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr)
110{
111 struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
112 void *iter = NULL;
113 int nelem;
114
115 do {
116 nelem = 1;
117 osd_req_decode_get_attr_list(or, &cur_attr, &nelem, &iter);
118 if ((cur_attr.attr_page == attr->attr_page) &&
119 (cur_attr.attr_id == attr->attr_id)) {
120 attr->len = cur_attr.len;
121 attr->val_ptr = cur_attr.val_ptr;
122 return 0;
123 }
124 } while (iter);
125
126 return -EIO;
127}
128
129int osd_req_read_kern(struct osd_request *or,
130 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
131{
132 struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
133 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
134
135 if (!bio)
136 return -ENOMEM;
137
138 osd_req_read(or, obj, bio, offset);
139 return 0;
140}
141
142int osd_req_write_kern(struct osd_request *or,
143 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
144{
145 struct request_queue *req_q = or->osd_dev->scsi_device->request_queue;
146 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
147
148 if (!bio)
149 return -ENOMEM;
150
151 osd_req_write(or, obj, bio, offset);
152 return 0;
153}
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