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 */
116 struct list_head head;
118 struct timeval sent; /* high-res time packet was sent */
119 u32 sent_jiffs; /* low-res jiffies-based sent time */
122 struct aoetgt *t; /* parent target I belong to */
124 struct sk_buff *skb; /* command skb freed on module exit */
125 struct sk_buff *r_skb; /* response skb for async processing */
134 struct net_device *nd;
140 unsigned char addr[6];
141 ushort nframes; /* cap on frames to use */
142 struct aoedev *d; /* parent device I belong to */
143 struct list_head ffree; /* list of free frames */
144 struct aoeif ifs[NAOEIFS];
145 struct aoeif *ifp; /* current aoeif in use */
146 ushort nout; /* number of AoE commands outstanding */
147 ushort maxout; /* current value for max outstanding */
148 ushort next_cwnd; /* incr maxout after decrementing to zero */
149 ushort ssthresh; /* slow start threshold */
150 ulong falloc; /* number of allocated frames */
151 int taint; /* how much we want to avoid this aoetgt */
161 u32 rttavg; /* scaled AoE round trip time average */
162 u32 rttdev; /* scaled round trip time mean deviation */
165 u16 nopen; /* (bd_openers isn't available without sleeping) */
166 u16 fw_ver; /* version of blade's firmware */
167 u16 lasttag; /* last tag sent */
170 struct work_struct work;/* disk create work struct */
172 struct dentry *debugfs;
173 struct request_queue *blkq;
174 struct hd_geometry geo;
176 struct timer_list timer;
178 struct sk_buff_head skbpool;
179 mempool_t *bufpool; /* for deadlock-free Buf allocation */
180 struct { /* pointers to work in progress */
186 struct list_head factive[NFACTIVE]; /* hash of active frames */
187 struct list_head rexmitq; /* deferred retransmissions */
188 struct aoetgt **targets;
189 ulong ntargets; /* number of allocated aoetgt pointers */
190 struct aoetgt **tgt; /* target in use when working */
195 /* kthread tracking */
197 struct completion rendez;
198 struct task_struct *task;
199 wait_queue_head_t *waitq;
207 int aoeblk_init(void);
208 void aoeblk_exit(void);
209 void aoeblk_gdalloc(void *);
210 void aoedisk_rm_debugfs(struct aoedev *d);
211 void aoedisk_rm_sysfs(struct aoedev *d);
213 int aoechr_init(void);
214 void aoechr_exit(void);
215 void aoechr_error(char *);
217 void aoecmd_work(struct aoedev *d);
218 void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
219 struct sk_buff *aoecmd_ata_rsp(struct sk_buff *);
220 void aoecmd_cfg_rsp(struct sk_buff *);
221 void aoecmd_sleepwork(struct work_struct *);
222 void aoecmd_wreset(struct aoetgt *t);
223 void aoecmd_cleanslate(struct aoedev *);
224 void aoecmd_exit(void);
225 int aoecmd_init(void);
226 struct sk_buff *aoecmd_ata_id(struct aoedev *);
227 void aoe_freetframe(struct frame *);
228 void aoe_flush_iocq(void);
229 void aoe_flush_iocq_by_index(int);
230 void aoe_end_request(struct aoedev *, struct request *, int);
231 int aoe_ktstart(struct ktstate *k);
232 void aoe_ktstop(struct ktstate *k);
234 int aoedev_init(void);
235 void aoedev_exit(void);
236 struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc);
237 void aoedev_downdev(struct aoedev *d);
238 int aoedev_flush(const char __user *str, size_t size);
239 void aoe_failbuf(struct aoedev *, struct buf *);
240 void aoedev_put(struct aoedev *);
242 int aoenet_init(void);
243 void aoenet_exit(void);
244 void aoenet_xmit(struct sk_buff_head *);
245 int is_aoe_netif(struct net_device *ifp);
246 int set_aoe_iflist(const char __user *str, size_t size);