mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 14:34:28 +08:00
61e7712e25
Makes the code a whole lot easier to read. Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
247 lines
6.0 KiB
C
247 lines
6.0 KiB
C
/* Copyright (c) 2013 Coraid, Inc. See COPYING for GPL terms. */
|
|
#include <linux/blk-mq.h>
|
|
|
|
#define VERSION "85"
|
|
#define AOE_MAJOR 152
|
|
#define DEVICE_NAME "aoe"
|
|
|
|
/* set AOE_PARTITIONS to 1 to use whole-disks only
|
|
* default is 16, which is 15 partitions plus the whole disk
|
|
*/
|
|
#ifndef AOE_PARTITIONS
|
|
#define AOE_PARTITIONS (16)
|
|
#endif
|
|
|
|
#define WHITESPACE " \t\v\f\n,"
|
|
|
|
enum {
|
|
AOECMD_ATA,
|
|
AOECMD_CFG,
|
|
AOECMD_VEND_MIN = 0xf0,
|
|
|
|
AOEFL_RSP = (1<<3),
|
|
AOEFL_ERR = (1<<2),
|
|
|
|
AOEAFL_EXT = (1<<6),
|
|
AOEAFL_DEV = (1<<4),
|
|
AOEAFL_ASYNC = (1<<1),
|
|
AOEAFL_WRITE = (1<<0),
|
|
|
|
AOECCMD_READ = 0,
|
|
AOECCMD_TEST,
|
|
AOECCMD_PTEST,
|
|
AOECCMD_SET,
|
|
AOECCMD_FSET,
|
|
|
|
AOE_HVER = 0x10,
|
|
};
|
|
|
|
struct aoe_hdr {
|
|
unsigned char dst[6];
|
|
unsigned char src[6];
|
|
__be16 type;
|
|
unsigned char verfl;
|
|
unsigned char err;
|
|
__be16 major;
|
|
unsigned char minor;
|
|
unsigned char cmd;
|
|
__be32 tag;
|
|
};
|
|
|
|
struct aoe_atahdr {
|
|
unsigned char aflags;
|
|
unsigned char errfeat;
|
|
unsigned char scnt;
|
|
unsigned char cmdstat;
|
|
unsigned char lba0;
|
|
unsigned char lba1;
|
|
unsigned char lba2;
|
|
unsigned char lba3;
|
|
unsigned char lba4;
|
|
unsigned char lba5;
|
|
unsigned char res[2];
|
|
};
|
|
|
|
struct aoe_cfghdr {
|
|
__be16 bufcnt;
|
|
__be16 fwver;
|
|
unsigned char scnt;
|
|
unsigned char aoeccmd;
|
|
unsigned char cslen[2];
|
|
};
|
|
|
|
enum {
|
|
DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */
|
|
DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */
|
|
DEVFL_EXT = (1<<2), /* device accepts lba48 commands */
|
|
DEVFL_GDALLOC = (1<<3), /* need to alloc gendisk */
|
|
DEVFL_GD_NOW = (1<<4), /* allocating gendisk */
|
|
DEVFL_KICKME = (1<<5), /* slow polling network card catch */
|
|
DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
|
|
DEVFL_FREEING = (1<<7), /* set when device is being cleaned up */
|
|
DEVFL_FREED = (1<<8), /* device has been cleaned up */
|
|
};
|
|
|
|
enum {
|
|
DEFAULTBCNT = 2 * 512, /* 2 sectors */
|
|
MIN_BUFS = 16,
|
|
NTARGETS = 4,
|
|
NAOEIFS = 8,
|
|
NSKBPOOLMAX = 256,
|
|
NFACTIVE = 61,
|
|
|
|
TIMERTICK = HZ / 10,
|
|
RTTSCALE = 8,
|
|
RTTDSCALE = 3,
|
|
RTTAVG_INIT = USEC_PER_SEC / 4 << RTTSCALE,
|
|
RTTDEV_INIT = RTTAVG_INIT / 4,
|
|
|
|
HARD_SCORN_SECS = 10, /* try another remote port after this */
|
|
MAX_TAINT = 1000, /* cap on aoetgt taint */
|
|
};
|
|
|
|
struct aoe_req {
|
|
unsigned long nr_bios;
|
|
};
|
|
|
|
struct buf {
|
|
ulong nframesout;
|
|
struct bio *bio;
|
|
struct bvec_iter iter;
|
|
struct request *rq;
|
|
};
|
|
|
|
enum frame_flags {
|
|
FFL_PROBE = 1,
|
|
};
|
|
|
|
struct frame {
|
|
struct list_head head;
|
|
u32 tag;
|
|
ktime_t sent; /* high-res time packet was sent */
|
|
ulong waited;
|
|
ulong waited_total;
|
|
struct aoetgt *t; /* parent target I belong to */
|
|
struct sk_buff *skb; /* command skb freed on module exit */
|
|
struct sk_buff *r_skb; /* response skb for async processing */
|
|
struct buf *buf;
|
|
struct bvec_iter iter;
|
|
char flags;
|
|
};
|
|
|
|
struct aoeif {
|
|
struct net_device *nd;
|
|
ulong lost;
|
|
int bcnt;
|
|
};
|
|
|
|
struct aoetgt {
|
|
unsigned char addr[6];
|
|
ushort nframes; /* cap on frames to use */
|
|
struct aoedev *d; /* parent device I belong to */
|
|
struct list_head ffree; /* list of free frames */
|
|
struct aoeif ifs[NAOEIFS];
|
|
struct aoeif *ifp; /* current aoeif in use */
|
|
ushort nout; /* number of AoE commands outstanding */
|
|
ushort maxout; /* current value for max outstanding */
|
|
ushort next_cwnd; /* incr maxout after decrementing to zero */
|
|
ushort ssthresh; /* slow start threshold */
|
|
ulong falloc; /* number of allocated frames */
|
|
int taint; /* how much we want to avoid this aoetgt */
|
|
int minbcnt;
|
|
int wpkts, rpkts;
|
|
char nout_probes;
|
|
};
|
|
|
|
struct aoedev {
|
|
struct aoedev *next;
|
|
ulong sysminor;
|
|
ulong aoemajor;
|
|
u32 rttavg; /* scaled AoE round trip time average */
|
|
u32 rttdev; /* scaled round trip time mean deviation */
|
|
u16 aoeminor;
|
|
u16 flags;
|
|
u16 nopen; /* (bd_openers isn't available without sleeping) */
|
|
u16 fw_ver; /* version of blade's firmware */
|
|
u16 lasttag; /* last tag sent */
|
|
u16 useme;
|
|
ulong ref;
|
|
struct work_struct work;/* disk create work struct */
|
|
struct gendisk *gd;
|
|
struct dentry *debugfs;
|
|
struct request_queue *blkq;
|
|
struct list_head rq_list;
|
|
struct blk_mq_tag_set tag_set;
|
|
struct hd_geometry geo;
|
|
sector_t ssize;
|
|
struct timer_list timer;
|
|
spinlock_t lock;
|
|
struct sk_buff_head skbpool;
|
|
mempool_t *bufpool; /* for deadlock-free Buf allocation */
|
|
struct { /* pointers to work in progress */
|
|
struct buf *buf;
|
|
struct bio *nxbio;
|
|
struct request *rq;
|
|
} ip;
|
|
ulong maxbcnt;
|
|
struct list_head factive[NFACTIVE]; /* hash of active frames */
|
|
struct list_head rexmitq; /* deferred retransmissions */
|
|
struct aoetgt **targets;
|
|
ulong ntargets; /* number of allocated aoetgt pointers */
|
|
struct aoetgt **tgt; /* target in use when working */
|
|
ulong kicked;
|
|
char ident[512];
|
|
};
|
|
|
|
/* kthread tracking */
|
|
struct ktstate {
|
|
struct completion rendez;
|
|
struct task_struct *task;
|
|
wait_queue_head_t *waitq;
|
|
int (*fn) (int);
|
|
char name[12];
|
|
spinlock_t *lock;
|
|
int id;
|
|
int active;
|
|
};
|
|
|
|
int aoeblk_init(void);
|
|
void aoeblk_exit(void);
|
|
void aoeblk_gdalloc(void *);
|
|
void aoedisk_rm_debugfs(struct aoedev *d);
|
|
|
|
int aoechr_init(void);
|
|
void aoechr_exit(void);
|
|
void aoechr_error(char *);
|
|
|
|
void aoecmd_work(struct aoedev *d);
|
|
void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
|
|
struct sk_buff *aoecmd_ata_rsp(struct sk_buff *);
|
|
void aoecmd_cfg_rsp(struct sk_buff *);
|
|
void aoecmd_sleepwork(struct work_struct *);
|
|
void aoecmd_wreset(struct aoetgt *t);
|
|
void aoecmd_cleanslate(struct aoedev *);
|
|
void aoecmd_exit(void);
|
|
int aoecmd_init(void);
|
|
struct sk_buff *aoecmd_ata_id(struct aoedev *);
|
|
void aoe_freetframe(struct frame *);
|
|
void aoe_flush_iocq(void);
|
|
void aoe_flush_iocq_by_index(int);
|
|
void aoe_end_request(struct aoedev *, struct request *, int);
|
|
int aoe_ktstart(struct ktstate *k);
|
|
void aoe_ktstop(struct ktstate *k);
|
|
|
|
int aoedev_init(void);
|
|
void aoedev_exit(void);
|
|
struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc);
|
|
void aoedev_downdev(struct aoedev *d);
|
|
int aoedev_flush(const char __user *str, size_t size);
|
|
void aoe_failbuf(struct aoedev *, struct buf *);
|
|
void aoedev_put(struct aoedev *);
|
|
|
|
int aoenet_init(void);
|
|
void aoenet_exit(void);
|
|
void aoenet_xmit(struct sk_buff_head *);
|
|
int is_aoe_netif(struct net_device *ifp);
|
|
int set_aoe_iflist(const char __user *str, size_t size);
|