1 /* Copyright (c) 2013 Coraid, Inc. See COPYING for GPL terms. */
4 #define DEVICE_NAME "aoe"
6 /* set AOE_PARTITIONS to 1 to use whole-disks only
7 * default is 16, which is 15 partitions plus the whole disk
10 #define AOE_PARTITIONS (16)
13 #define WHITESPACE " \t\v\f\n,"
18 AOECMD_VEND_MIN
= 0xf0,
25 AOEAFL_ASYNC
= (1<<1),
26 AOEAFL_WRITE
= (1<<0),
51 unsigned char errfeat
;
53 unsigned char cmdstat
;
67 unsigned char aoeccmd
;
68 unsigned char cslen
[2];
72 DEVFL_UP
= 1, /* device is installed in system and ready for AoE->ATA commands */
73 DEVFL_TKILL
= (1<<1), /* flag for timer to know when to kill self */
74 DEVFL_EXT
= (1<<2), /* device accepts lba48 commands */
75 DEVFL_GDALLOC
= (1<<3), /* need to alloc gendisk */
76 DEVFL_GD_NOW
= (1<<4), /* allocating gendisk */
77 DEVFL_KICKME
= (1<<5), /* slow polling network card catch */
78 DEVFL_NEWSIZE
= (1<<6), /* need to update dev size in block layer */
79 DEVFL_FREEING
= (1<<7), /* set when device is being cleaned up */
80 DEVFL_FREED
= (1<<8), /* device has been cleaned up */
84 DEFAULTBCNT
= 2 * 512, /* 2 sectors */
94 RTTAVG_INIT
= USEC_PER_SEC
/ 4 << RTTSCALE
,
95 RTTDEV_INIT
= RTTAVG_INIT
/ 4,
97 HARD_SCORN_SECS
= 10, /* try another remote port after this */
98 MAX_TAINT
= 1000, /* cap on aoetgt taint */
104 struct bvec_iter iter
;
113 struct list_head head
;
115 ktime_t sent
; /* high-res time packet was sent */
118 struct aoetgt
*t
; /* parent target I belong to */
119 struct sk_buff
*skb
; /* command skb freed on module exit */
120 struct sk_buff
*r_skb
; /* response skb for async processing */
122 struct bvec_iter iter
;
127 struct net_device
*nd
;
133 unsigned char addr
[6];
134 ushort nframes
; /* cap on frames to use */
135 struct aoedev
*d
; /* parent device I belong to */
136 struct list_head ffree
; /* list of free frames */
137 struct aoeif ifs
[NAOEIFS
];
138 struct aoeif
*ifp
; /* current aoeif in use */
139 ushort nout
; /* number of AoE commands outstanding */
140 ushort maxout
; /* current value for max outstanding */
141 ushort next_cwnd
; /* incr maxout after decrementing to zero */
142 ushort ssthresh
; /* slow start threshold */
143 ulong falloc
; /* number of allocated frames */
144 int taint
; /* how much we want to avoid this aoetgt */
154 u32 rttavg
; /* scaled AoE round trip time average */
155 u32 rttdev
; /* scaled round trip time mean deviation */
158 u16 nopen
; /* (bd_openers isn't available without sleeping) */
159 u16 fw_ver
; /* version of blade's firmware */
160 u16 lasttag
; /* last tag sent */
163 struct work_struct work
;/* disk create work struct */
165 struct dentry
*debugfs
;
166 struct request_queue
*blkq
;
167 struct hd_geometry geo
;
169 struct timer_list timer
;
171 struct sk_buff_head skbpool
;
172 mempool_t
*bufpool
; /* for deadlock-free Buf allocation */
173 struct { /* pointers to work in progress */
179 struct list_head factive
[NFACTIVE
]; /* hash of active frames */
180 struct list_head rexmitq
; /* deferred retransmissions */
181 struct aoetgt
**targets
;
182 ulong ntargets
; /* number of allocated aoetgt pointers */
183 struct aoetgt
**tgt
; /* target in use when working */
188 /* kthread tracking */
190 struct completion rendez
;
191 struct task_struct
*task
;
192 wait_queue_head_t
*waitq
;
200 int aoeblk_init(void);
201 void aoeblk_exit(void);
202 void aoeblk_gdalloc(void *);
203 void aoedisk_rm_debugfs(struct aoedev
*d
);
204 void aoedisk_rm_sysfs(struct aoedev
*d
);
206 int aoechr_init(void);
207 void aoechr_exit(void);
208 void aoechr_error(char *);
210 void aoecmd_work(struct aoedev
*d
);
211 void aoecmd_cfg(ushort aoemajor
, unsigned char aoeminor
);
212 struct sk_buff
*aoecmd_ata_rsp(struct sk_buff
*);
213 void aoecmd_cfg_rsp(struct sk_buff
*);
214 void aoecmd_sleepwork(struct work_struct
*);
215 void aoecmd_wreset(struct aoetgt
*t
);
216 void aoecmd_cleanslate(struct aoedev
*);
217 void aoecmd_exit(void);
218 int aoecmd_init(void);
219 struct sk_buff
*aoecmd_ata_id(struct aoedev
*);
220 void aoe_freetframe(struct frame
*);
221 void aoe_flush_iocq(void);
222 void aoe_flush_iocq_by_index(int);
223 void aoe_end_request(struct aoedev
*, struct request
*, int);
224 int aoe_ktstart(struct ktstate
*k
);
225 void aoe_ktstop(struct ktstate
*k
);
227 int aoedev_init(void);
228 void aoedev_exit(void);
229 struct aoedev
*aoedev_by_aoeaddr(ulong maj
, int min
, int do_alloc
);
230 void aoedev_downdev(struct aoedev
*d
);
231 int aoedev_flush(const char __user
*str
, size_t size
);
232 void aoe_failbuf(struct aoedev
*, struct buf
*);
233 void aoedev_put(struct aoedev
*);
235 int aoenet_init(void);
236 void aoenet_exit(void);
237 void aoenet_xmit(struct sk_buff_head
*);
238 int is_aoe_netif(struct net_device
*ifp
);
239 int set_aoe_iflist(const char __user
*str
, size_t size
);