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Arnaldo Carvalho de Melo 8109b02b53 [DCCP]: Whitespace cleanups 
That accumulated over the last months hackaton, shame on me for not
using git-apply whitespace helping hand, will do that from now on.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-11 14:35:00 -08:00
Arnaldo Carvalho de Melo 1fba78b6cb [DCCP] ccid3: Fixup some type conversions related to rtts 
Spotted by David Miller when compiling on sparc64, I reproduced it here on
parisc64, that are the only platforms to define __kernel_suseconds_t as an
'int', all the others, x86_64 and x86 included typedef it as a 'long', but from
the definition of suseconds_t it should just be an 'int' on platforms where it
is >= 32bits, it would not require all the castings from suseconds_t to (int)
when printking variables of this type, that are not needed on parisc64 and
sparc64.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-11 14:34:59 -08:00
Arnaldo Carvalho de Melo 12d40e43d2 [PATCH] Save some bytes in struct inode 
[acme@newtoy net-2.6.20]$ pahole --cacheline 64 fs/inode.o inode
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/linux/dcache.h:86 */
struct inode {
        struct hlist_node          i_hash;               /*     0     8 */
        struct list_head           i_list;               /*     8     8 */
        struct list_head           i_sb_list;            /*    16     8 */
        struct list_head           i_dentry;             /*    24     8 */
        long unsigned int          i_ino;                /*    32     4 */
        atomic_t                   i_count;              /*    36     4 */
        umode_t                    i_mode;               /*    40     2 */

        /* XXX 2 bytes hole, try to pack */

        unsigned int               i_nlink;              /*    44     4 */
        uid_t                      i_uid;                /*    48     4 */
        gid_t                      i_gid;                /*    52     4 */
        dev_t                      i_rdev;               /*    56     4 */
        loff_t                     i_size;               /*    60     8 */
        struct timespec            i_atime;              /*    68     8 */
        struct timespec            i_mtime;              /*    76     8 */
        struct timespec            i_ctime;              /*    84     8 */
        unsigned int               i_blkbits;            /*    92     4 */
        long unsigned int          i_version;            /*    96     4 */
        blkcnt_t                   i_blocks;             /*   100     4 */
        short unsigned int         i_bytes;              /*   104     2 */

        /* XXX 2 bytes hole, try to pack */

        spinlock_t                 i_lock;               /*   108    40 */
        struct mutex               i_mutex;              /*   148    76 */
        struct rw_semaphore        i_alloc_sem;          /*   224    64 */
        struct inode_operations *  i_op;                 /*   288     4 */
        const struct file_operations  * i_fop;           /*   292     4 */
        struct super_block *       i_sb;                 /*   296     4 */
        struct file_lock *         i_flock;              /*   300     4 */
        struct address_space *     i_mapping;            /*   304     4 */
        struct address_space       i_data;               /*   308   188 */
        struct list_head           i_devices;            /*   496     8 */
        union                      ;                     /*   504     4 */
        int                        i_cindex;             /*   508     4 */
        __u32                      i_generation;         /*   512     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          i_dnotify_mask;       /*   516     4 */
        struct dnotify_struct *    i_dnotify;            /*   520     4 */
        struct list_head           inotify_watches;      /*   524     8 */
        struct mutex               inotify_mutex;        /*   532    76 */
        long unsigned int          i_state;              /*   608     4 */
        long unsigned int          dirtied_when;         /*   612     4 */
        unsigned int               i_flags;              /*   616     4 */
        atomic_t                   i_writecount;         /*   620     4 */
        void *                     i_security;           /*   624     4 */
        void *                     i_private;            /*   628     4 */
}; /* size: 632, sum members: 628, holes: 2, sum holes: 4 */

[acme@newtoy net-2.6.20]$

So just moving i_mode to after i_bytes we save 4 bytes by nuking both holes:

[acme@newtoy net-2.6.20]$ codiff -V /tmp/inode.o.before fs/inode.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/fs/inode.c:
  struct inode |   -4
    i_mode;
     from: umode_t               /*    40(0)     2(0) */
     to:   umode_t               /*   102(0)     2(0) */
 1 struct changed
[acme@newtoy net-2.6.20]$

I've prunned all the other offset changes, only this one is of interest here.

So now we have:

[acme@newtoy net-2.6.20]$ pahole --cacheline 64 ../OUTPUT/qemu/net-2.6.20/fs/inode.o inode
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/linux/dcache.h:86 */
struct inode {
        struct hlist_node          i_hash;               /*     0     8 */
        struct list_head           i_list;               /*     8     8 */
        struct list_head           i_sb_list;            /*    16     8 */
        struct list_head           i_dentry;             /*    24     8 */
        long unsigned int          i_ino;                /*    32     4 */
        atomic_t                   i_count;              /*    36     4 */
        unsigned int               i_nlink;              /*    40     4 */
        uid_t                      i_uid;                /*    44     4 */
        gid_t                      i_gid;                /*    48     4 */
        dev_t                      i_rdev;               /*    52     4 */
        loff_t                     i_size;               /*    56     8 */
        /* ---------- cacheline 1 boundary ---------- */
        struct timespec            i_atime;              /*    64     8 */
        struct timespec            i_mtime;              /*    72     8 */
        struct timespec            i_ctime;              /*    80     8 */
        unsigned int               i_blkbits;            /*    88     4 */
        long unsigned int          i_version;            /*    92     4 */
        blkcnt_t                   i_blocks;             /*    96     4 */
        short unsigned int         i_bytes;              /*   100     2 */
        umode_t                    i_mode;               /*   102     2 */
        spinlock_t                 i_lock;               /*   104    40 */
        struct mutex               i_mutex;              /*   144    76 */
        struct rw_semaphore        i_alloc_sem;          /*   220    64 */
        struct inode_operations *  i_op;                 /*   284     4 */
        const struct file_operations  * i_fop;           /*   288     4 */
        struct super_block *       i_sb;                 /*   292     4 */
        struct file_lock *         i_flock;              /*   296     4 */
        struct address_space *     i_mapping;            /*   300     4 */
        struct address_space       i_data;               /*   304   188 */
        struct list_head           i_devices;            /*   492     8 */
        union                      ;                     /*   500     4 */
        int                        i_cindex;             /*   504     4 */
        __u32                      i_generation;         /*   508     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          i_dnotify_mask;       /*   512     4 */
        struct dnotify_struct *    i_dnotify;            /*   516     4 */
        struct list_head           inotify_watches;      /*   520     8 */
        struct mutex               inotify_mutex;        /*   528    76 */
        long unsigned int          i_state;              /*   604     4 */
        long unsigned int          dirtied_when;         /*   608     4 */
        unsigned int               i_flags;              /*   612     4 */
        atomic_t                   i_writecount;         /*   616     4 */
        void *                     i_security;           /*   620     4 */
        void *                     i_private;            /*   624     4 */
}; /* size: 628 */

[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
 2006-12-07 08:39:43 -08:00
Arnaldo Carvalho de Melo 36de643786 [PATCH] Save some bytes in struct mm_struct 
Before:
[acme@newtoy net-2.6.20]$ pahole --cacheline 32 kernel/sched.o mm_struct

/* include2/asm/processor.h:542 */
struct mm_struct {
        struct vm_area_struct *    mmap;                 /*     0     4 */
        struct rb_root             mm_rb;                /*     4     4 */
        struct vm_area_struct *    mmap_cache;           /*     8     4 */
        long unsigned int          (*get_unmapped_area)(); /*    12     4 */
        void                       (*unmap_area)();      /*    16     4 */
        long unsigned int          mmap_base;            /*    20     4 */
        long unsigned int          task_size;            /*    24     4 */
        long unsigned int          cached_hole_size;     /*    28     4 */
        /* ---------- cacheline 1 boundary ---------- */
        long unsigned int          free_area_cache;      /*    32     4 */
        pgd_t *                    pgd;                  /*    36     4 */
        atomic_t                   mm_users;             /*    40     4 */
        atomic_t                   mm_count;             /*    44     4 */
        int                        map_count;            /*    48     4 */
        struct rw_semaphore        mmap_sem;             /*    52    64 */
        spinlock_t                 page_table_lock;      /*   116    40 */
        struct list_head           mmlist;               /*   156     8 */
        mm_counter_t               _file_rss;            /*   164     4 */
        mm_counter_t               _anon_rss;            /*   168     4 */
        long unsigned int          hiwater_rss;          /*   172     4 */
        long unsigned int          hiwater_vm;           /*   176     4 */
        long unsigned int          total_vm;             /*   180     4 */
        long unsigned int          locked_vm;            /*   184     4 */
        long unsigned int          shared_vm;            /*   188     4 */
        /* ---------- cacheline 6 boundary ---------- */
        long unsigned int          exec_vm;              /*   192     4 */
        long unsigned int          stack_vm;             /*   196     4 */
        long unsigned int          reserved_vm;          /*   200     4 */
        long unsigned int          def_flags;            /*   204     4 */
        long unsigned int          nr_ptes;              /*   208     4 */
        long unsigned int          start_code;           /*   212     4 */
        long unsigned int          end_code;             /*   216     4 */
        long unsigned int          start_data;           /*   220     4 */
        /* ---------- cacheline 7 boundary ---------- */
        long unsigned int          end_data;             /*   224     4 */
        long unsigned int          start_brk;            /*   228     4 */
        long unsigned int          brk;                  /*   232     4 */
        long unsigned int          start_stack;          /*   236     4 */
        long unsigned int          arg_start;            /*   240     4 */
        long unsigned int          arg_end;              /*   244     4 */
        long unsigned int          env_start;            /*   248     4 */
        long unsigned int          env_end;              /*   252     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          saved_auxv[44];       /*   256   176 */
        unsigned int               dumpable:2;           /*   432     4 */
        cpumask_t                  cpu_vm_mask;          /*   436     4 */
        mm_context_t               context;              /*   440    68 */
        long unsigned int          swap_token_time;      /*   508     4 */
        /* ---------- cacheline 16 boundary ---------- */
        char                       recent_pagein;        /*   512     1 */

        /* XXX 3 bytes hole, try to pack */

        int                        core_waiters;         /*   516     4 */
        struct completion *        core_startup_done;    /*   520     4 */
        struct completion          core_done;            /*   524    52 */
        rwlock_t                   ioctx_list_lock;      /*   576    36 */
        struct kioctx *            ioctx_list;           /*   612     4 */
}; /* size: 616, sum members: 613, holes: 1, sum holes: 3, cachelines: 20,
      last cacheline: 8 bytes */

After:

[acme@newtoy net-2.6.20]$ pahole --cacheline 32 kernel/sched.o mm_struct
/* include2/asm/processor.h:542 */
struct mm_struct {
        struct vm_area_struct *    mmap;                 /*     0     4 */
        struct rb_root             mm_rb;                /*     4     4 */
        struct vm_area_struct *    mmap_cache;           /*     8     4 */
        long unsigned int          (*get_unmapped_area)(); /*    12     4 */
        void                       (*unmap_area)();      /*    16     4 */
        long unsigned int          mmap_base;            /*    20     4 */
        long unsigned int          task_size;            /*    24     4 */
        long unsigned int          cached_hole_size;     /*    28     4 */
        /* ---------- cacheline 1 boundary ---------- */
        long unsigned int          free_area_cache;      /*    32     4 */
        pgd_t *                    pgd;                  /*    36     4 */
        atomic_t                   mm_users;             /*    40     4 */
        atomic_t                   mm_count;             /*    44     4 */
        int                        map_count;            /*    48     4 */
        struct rw_semaphore        mmap_sem;             /*    52    64 */
        spinlock_t                 page_table_lock;      /*   116    40 */
        struct list_head           mmlist;               /*   156     8 */
        mm_counter_t               _file_rss;            /*   164     4 */
        mm_counter_t               _anon_rss;            /*   168     4 */
        long unsigned int          hiwater_rss;          /*   172     4 */
        long unsigned int          hiwater_vm;           /*   176     4 */
        long unsigned int          total_vm;             /*   180     4 */
        long unsigned int          locked_vm;            /*   184     4 */
        long unsigned int          shared_vm;            /*   188     4 */
        /* ---------- cacheline 6 boundary ---------- */
        long unsigned int          exec_vm;              /*   192     4 */
        long unsigned int          stack_vm;             /*   196     4 */
        long unsigned int          reserved_vm;          /*   200     4 */
        long unsigned int          def_flags;            /*   204     4 */
        long unsigned int          nr_ptes;              /*   208     4 */
        long unsigned int          start_code;           /*   212     4 */
        long unsigned int          end_code;             /*   216     4 */
        long unsigned int          start_data;           /*   220     4 */
        /* ---------- cacheline 7 boundary ---------- */
        long unsigned int          end_data;             /*   224     4 */
        long unsigned int          start_brk;            /*   228     4 */
        long unsigned int          brk;                  /*   232     4 */
        long unsigned int          start_stack;          /*   236     4 */
        long unsigned int          arg_start;            /*   240     4 */
        long unsigned int          arg_end;              /*   244     4 */
        long unsigned int          env_start;            /*   248     4 */
        long unsigned int          env_end;              /*   252     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          saved_auxv[44];       /*   256   176 */
        cpumask_t                  cpu_vm_mask;          /*   432     4 */
        mm_context_t               context;              /*   436    68 */
        long unsigned int          swap_token_time;      /*   504     4 */
        char                       recent_pagein;        /*   508     1 */
        unsigned char              dumpable:2;           /*   509     1 */

        /* XXX 2 bytes hole, try to pack */

        int                        core_waiters;         /*   512     4 */
        struct completion *        core_startup_done;    /*   516     4 */
        struct completion          core_done;            /*   520    52 */
        rwlock_t                   ioctx_list_lock;      /*   572    36 */
        struct kioctx *            ioctx_list;           /*   608     4 */
}; /* size: 612, sum members: 610, holes: 1, sum holes: 2, cachelines: 20,
      last cacheline: 4 bytes */

[acme@newtoy net-2.6.20]$ codiff -V /tmp/sched.o.before kernel/sched.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/kernel/sched.c:
  struct mm_struct |   -4
    dumpable:2;
     from: unsigned int          /*   432(30)    4(2) */
     to:   unsigned char         /*   509(6)     1(2) */
< SNIP other offset changes >
 1 struct changed
[acme@newtoy net-2.6.20]$

I'm not aware of any problem about using 2 byte wide bitfields where
previously a 4 byte wide one was, holler if there is any, I wouldn't be
surprised, bitfields are things from hell.

For the curious, 432(30) means: at offset 432 from the struct start, at
offset 30 in the bitfield (yeah, it comes backwards, hellish, huh?) ditto
for 509(6), while 4(2) and 1(2) means "struct field size(bitfield size)".

Now we have a 2 bytes hole and are using only 4 bytes of the last 32
bytes cacheline, any takers? :-)

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
 2006-12-07 08:39:25 -08:00
Arnaldo Carvalho de Melo 841bac1d60 [DCCP]: Make {set,get}sockopt(DCCP_SOCKOPT_PACKET_SIZE) return 0 
To reflect the fact that this now is of no effect, not making apps
stop working, just be warned in the system log.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:31:00 -08:00
Arnaldo Carvalho de Melo ee41e2dff1 [INET]: Change protocol field in struct inet_protosw to u16 
[acme@newtoy net-2.6.20]$ pahole /tmp/tcp_ipv6.o inet_protosw
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/net/protocol.h:69 */
struct inet_protosw {
        struct list_head           list;                 /*     0     8 */
        short unsigned int         type;                 /*     8     2 */

        /* XXX 2 bytes hole, try to pack */

        int                        protocol;             /*    12     4 */
        struct proto *             prot;                 /*    16     4 */
        const struct proto_ops  *  ops;                  /*    20     4 */
        int                        capability;           /*    24     4 */
        char                       no_check;             /*    28     1 */
        unsigned char              flags;                /*    29     1 */
}; /* size: 32, sum members: 28, holes: 1, sum holes: 2, padding: 2 */

So that we can kill that hole, protocol can only go all the way to 255 (RAW).

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:55 -08:00
Arnaldo Carvalho de Melo 3a137d2065 [TCP]: Renove the __ prefix on the struct tcp_sock members 
As this struct is not userland visible at all.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:54 -08:00
Arnaldo Carvalho de Melo 2ff52f282c [TCP]: Change tcp_header_len member in tcp_sock to u16 
With this we eliminate the last hole in struct tcp_sock.

End result:

[acme@newtoy net-2.6.20]$ codiff -sV /tmp/tcp.o.before net/ipv4/tcp.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/tcp.c:
  struct tcp_sock |   -4
    tcp_header_len;
     from: int                   /*  1000(0)     4(0) */
     to:   u16                   /*  1000(0)     2(0) */
 1 struct changed
[acme@newtoy net-2.6.20]$

Now sizeof(tcp_sock) is just...

[acme@newtoy net-2.6.20]$ pahole --sizes ../OUTPUT/qemu/net-2.6.20/net/ipv4/tcp.o | grep -w tcp_sock
struct tcp_sock: 1500 0

1500 bytes ;-)

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:53 -08:00
Arnaldo Carvalho de Melo 46ca5f5dc4 [XFRM]: Pack struct xfrm_policy 
[acme@newtoy net-2.6.20]$ pahole net/ipv4/tcp.o xfrm_policy
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/linux/security.h:67 */
struct xfrm_policy {
        struct xfrm_policy *       next;                 /*     0     4 */
        struct hlist_node          bydst;                /*     4     8 */
        struct hlist_node          byidx;                /*    12     8 */
        rwlock_t                   lock;                 /*    20    36 */
        atomic_t                   refcnt;               /*    56     4 */
        struct timer_list          timer;                /*    60    24 */
        u8                         type;                 /*    84     1 */

        /* XXX 3 bytes hole, try to pack */

        u32                        priority;             /*    88     4 */
        u32                        index;                /*    92     4 */
        struct xfrm_selector       selector;             /*    96    56 */
        struct xfrm_lifetime_cfg   lft;                  /*   152    64 */
        struct xfrm_lifetime_cur   curlft;               /*   216    32 */
        struct dst_entry *         bundles;              /*   248     4 */
        __u16                      family;               /*   252     2 */
        __u8                       action;               /*   254     1 */
        __u8                       flags;                /*   255     1 */
        __u8                       dead;                 /*   256     1 */
        __u8                       xfrm_nr;              /*   257     1 */

        /* XXX 2 bytes hole, try to pack */

        struct xfrm_sec_ctx *      security;             /*   260     4 */
        struct xfrm_tmpl           xfrm_vec[6];          /*   264   360 */
}; /* size: 624, sum members: 619, holes: 2, sum holes: 5 */

So lets have just one hole instead of two, by moving 'type' to just before 'action',
end result:

[acme@newtoy net-2.6.20]$ codiff -s /tmp/tcp.o.before net/ipv4/tcp.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/tcp.c:
  struct xfrm_policy |   -4
 1 struct changed
[acme@newtoy net-2.6.20]$

[acme@newtoy net-2.6.20]$ pahole -c 64 net/ipv4/tcp.o xfrm_policy
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/linux/security.h:67 */
struct xfrm_policy {
        struct xfrm_policy *       next;                 /*     0     4 */
        struct hlist_node          bydst;                /*     4     8 */
        struct hlist_node          byidx;                /*    12     8 */
        rwlock_t                   lock;                 /*    20    36 */
        atomic_t                   refcnt;               /*    56     4 */
        struct timer_list          timer;                /*    60    24 */
        u32                        priority;             /*    84     4 */
        u32                        index;                /*    88     4 */
        struct xfrm_selector       selector;             /*    92    56 */
        struct xfrm_lifetime_cfg   lft;                  /*   148    64 */
        struct xfrm_lifetime_cur   curlft;               /*   212    32 */
        struct dst_entry *         bundles;              /*   244     4 */
        u16                        family;               /*   248     2 */
        u8                         type;                 /*   250     1 */
        u8                         action;               /*   251     1 */
        u8                         flags;                /*   252     1 */
        u8                         dead;                 /*   253     1 */
        u8                         xfrm_nr;              /*   254     1 */

        /* XXX 1 byte hole, try to pack */

        struct xfrm_sec_ctx *      security;             /*   256     4 */
        struct xfrm_tmpl           xfrm_vec[6];          /*   260   360 */
}; /* size: 620, sum members: 619, holes: 1, sum holes: 1 */

Are there any fugly data dependencies here? None that I know.

In the process changed the removed the __ prefixed types, that are just for
userspace visible headers.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:48 -08:00
Arnaldo Carvalho de Melo d5c42c0ec4 [NET]: Pack struct hh_cache 
[acme@newtoy net-2.6.20]$ pahole net/ipv4/tcp.o hh_cache
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/linux/netdevice.h:190 */
struct hh_cache {
        struct hh_cache *          hh_next;              /*     0     4 */
        atomic_t                   hh_refcnt;            /*     4     4 */
        __be16                     hh_type;              /*     8     2 */

        /* XXX 2 bytes hole, try to pack */

        int                        hh_len;               /*    12     4 */
        int                        (*hh_output)();       /*    16     4 */
        rwlock_t                   hh_lock;              /*    20    36 */
        long unsigned int          hh_data[24];          /*    56    96 */
}; /* size: 152, sum members: 150, holes: 1, sum holes: 2 */

[acme@newtoy net-2.6.20]$ find net -name "*.[ch]" | xargs grep 'hh_len.\+=' | sort -u
net/atm/br2684.c:               hh->hh_len = PADLEN + ETH_HLEN;
net/ethernet/eth.c:     hh->hh_len = ETH_HLEN;
net/ipv4/ipconfig.c:    int hh_len = LL_RESERVED_SPACE(dev);
net/ipv4/ip_output.c:   hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
net/ipv4/ip_output.c:   int hh_len = LL_RESERVED_SPACE(dev);
net/ipv4/netfilter.c:   hh_len = (*pskb)->dst->dev->hard_header_len;
net/ipv4/raw.c: hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
net/ipv6/ip6_output.c:  hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
net/ipv6/netfilter/ip6t_REJECT.c:       hh_len = (dst->dev->hard_header_len + 15)&~15;
net/ipv6/raw.c: hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
[acme@newtoy net-2.6.20]$

[acme@newtoy net-2.6.20]$ find include -name "*.h" | xargs grep 'define ETH_HLEN'
include/linux/if_ether.h:#define ETH_HLEN       14              /* Total octets in header.       */

        (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)

[acme@newtoy net-2.6.20]$ pahole net/ipv4/tcp.o net_device | grep hard_header_len
        short unsigned int         hard_header_len;      /*   106     2 */
[acme@newtoy net-2.6.20]$

So I think we're safe in turning hh_len an u16, end result:

[acme@newtoy net-2.6.20]$ codiff -sV /tmp/tcp.o.before net/ipv4/tcp.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/tcp.c:
  struct hh_cache |   -4
    hh_len;
     from: int                   /*    12(0)     4(0) */
     to:   u16                   /*    10(0)     2(0) */
 1 struct changed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:47 -08:00
Arnaldo Carvalho de Melo 850db6b8c5 [INET_CONNECTION_SOCK]: Pack struct inet_connection_sock_af_ops 
We have a hole in:

[acme@newtoy net-2.6.20]$ pahole net/ipv6/tcp_ipv6.o inet_connection_sock_af_ops
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/net/inet_connection_sock.h:38 */
struct inet_connection_sock_af_ops {
        int                        (*queue_xmit)();      /*     0     4 */
        void                       (*send_check)();      /*     4     4 */
        int                        (*rebuild_header)();  /*     8     4 */
        int                        (*conn_request)();    /*    12     4 */
        struct sock *              (*syn_recv_sock)();   /*    16     4 */
        int                        (*remember_stamp)();  /*    20     4 */
        __u16                      net_header_len;       /*    24     2 */

        /* XXX 2 bytes hole, try to pack */

        int                        (*setsockopt)();      /*    28     4 */
        int                        (*getsockopt)();      /*    32     4 */
        int                        (*compat_setsockopt)(); /*    36     4 */
        int                        (*compat_getsockopt)(); /*    40     4 */
        void                       (*addr2sockaddr)();   /*    44     4 */
        int                        sockaddr_len;         /*    48     4 */
}; /* size: 52, sum members: 50, holes: 1, sum holes: 2 */

But we don't need sockaddr_len to be an int:

[acme@newtoy net-2.6.20]$ find net -name "*.[ch]" | xargs grep '\.sockaddr_len.\+=' | sort -u
net/dccp/ipv4.c:        .sockaddr_len      = sizeof(struct sockaddr_in),
net/dccp/ipv6.c:        .sockaddr_len      = sizeof(struct sockaddr_in6),
net/ipv4/tcp_ipv4.c:    .sockaddr_len      = sizeof(struct sockaddr_in),
net/ipv6/tcp_ipv6.c:    .sockaddr_len      = sizeof(struct sockaddr_in6),
net/sctp/ipv6.c:        .sockaddr_len      = sizeof(struct sockaddr_in6),
net/sctp/protocol.c:    .sockaddr_len      = sizeof(struct sockaddr_in),

[acme@newtoy net-2.6.20]$ pahole --sizes net/ipv6/tcp_ipv6.o | grep sockaddr_in
struct sockaddr_in: 16 0
struct sockaddr_in6: 28 0
[acme@newtoy net-2.6.20]$

So I turned sockaddr_len a 'u16', and now:

[acme@newtoy net-2.6.20]$ pahole net/ipv6/tcp_ipv6.o inet_connection_sock_af_ops
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/net/inet_connection_sock.h:38 */
struct inet_connection_sock_af_ops {
        int            (*queue_xmit)();        /*     0   4 */
        void           (*send_check)();        /*     4   4 */
        int            (*rebuild_header)();    /*     8   4 */
        int            (*conn_request)();      /*    12   4 */
        struct sock *  (*syn_recv_sock)();     /*    16   4 */
        int            (*remember_stamp)();    /*    20   4 */
        u16            net_header_len;         /*    24   2 */
        u16            sockaddr_len;           /*    26   2 */
        int            (*setsockopt)();        /*    28   4 */
        int            (*getsockopt)();        /*    32   4 */
        int            (*compat_setsockopt)(); /*    36   4 */
        int            (*compat_getsockopt)(); /*    40   4 */
        void           (*addr2sockaddr)();     /*    44   4 */
}; /* size: 48 */

So we've saved 4 bytes:

[acme@newtoy net-2.6.20]$ codiff -sV /tmp/tcp_ipv6.o.before net/ipv6/tcp_ipv6.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv6/tcp_ipv6.c:
  struct inet_connection_sock_af_ops |   -4
    net_header_len;
     from: __u16                 /*    24(0)     2(0) */
     to:   u16                   /*    24(0)     2(0) */
    sockaddr_len;
     from: int                   /*    48(0)     4(0) */
     to:   u16                   /*    26(0)     2(0) */
 1 struct changed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:46 -08:00
Arnaldo Carvalho de Melo cdbc6dae5c [XFRM]: Use kmemdup where appropriate 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:22 -08:00
Arnaldo Carvalho de Melo 2710b57ff9 [TIPC]: Use kzalloc where appropriate 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:21 -08:00
Arnaldo Carvalho de Melo e69062b4f7 [SUNRPC]: Use k{mem,str}dup where applicable 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:20 -08:00
Arnaldo Carvalho de Melo af997d8c95 [SCTP]: Use kzalloc where appropriate 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:19 -08:00
Arnaldo Carvalho de Melo c7b1b24978 [SCHED]: Use kmemdup & kzalloc where appropriate 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:18 -08:00
Arnaldo Carvalho de Melo b3ab09f9e1 [IRDA]: Use kmemdup where applicable 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:17 -08:00
Arnaldo Carvalho de Melo 8b2ed4bba4 [IPVS]: Use kmemdup where appropriate 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:16 -08:00
Arnaldo Carvalho de Melo e6b61105f6 [DECNET]: Use kzalloc where applicable 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:15 -08:00
Arnaldo Carvalho de Melo b1a98bf685 [NET] neighbour: Use kmemdup where applicable 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:14 -08:00
Arnaldo Carvalho de Melo 2afe37cdff [ATM]: Use kmemdup & kzalloc where applicable 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:30:13 -08:00
Arnaldo Carvalho de Melo 352d48008b [TCP]: Tidy up skb_entail 
Heck, it even saves us some few bytes:

[acme@newtoy net-2.6.20]$ codiff -f /tmp/tcp.o.before ../OUTPUT/qemu/net-2.6.20/net/ipv4/tcp.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/tcp.c:
  tcp_sendpage |   -7
  tcp_sendmsg  |   -5
 2 functions changed, 12 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:24:03 -08:00
Arnaldo Carvalho de Melo eafff86d3b [NETROM]: Use kmemdup 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:24:02 -08:00
Arnaldo Carvalho de Melo 0459d70add [AX25]: Use kmemdup 
Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/ax25.ko.before /tmp/ax25.ko.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/ax25_out.c:
  ax25_send_frame |   -8
 1 function changed, 8 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/ax25_route.c:
  ax25_rt_autobind |  -15
 1 function changed, 15 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/af_ax25.c:
  ax25_make_new |  -33
 1 function changed, 33 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ax25/sysctl_net_ax25.c:
  ax25_register_sysctl |  -21
 1 function changed, 21 bytes removed

/tmp/ax25.ko.after:
 4 functions changed, 77 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:24:01 -08:00
Arnaldo Carvalho de Melo c66b721a50 [DECNET]: Use kmemdup 
Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/decnet.ko.before /tmp/decnet.ko.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/decnet/dn_dev.c:
  dn_dev_sysctl_register |  -51
 1 function changed, 51 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:24:00 -08:00
Arnaldo Carvalho de Melo eed73417d5 [DCCP]: Use kmemdup 
Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/dccp.ko.before /tmp/dccp.ko.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/dccp/feat.c:
  __dccp_feat_init      |  -16
  dccp_feat_change_recv |  -55
  dccp_feat_clone       |  -56
 3 functions changed, 127 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:59 -08:00
Arnaldo Carvalho de Melo af879cc704 [IPV6]: Use kmemdup 
Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/ipv6.ko.before /tmp/ipv6.ko.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv6/ip6_output.c:
  ip6_output      |  -52
  ip6_append_data |   +2
 2 functions changed, 2 bytes added, 52 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv6/addrconf.c:
  addrconf_sysctl_register |  -27
 1 function changed, 27 bytes removed

/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv6/tcp_ipv6.c:
  tcp_v6_syn_recv_sock  |  -32
  tcp_v6_parse_md5_keys |  -24
 2 functions changed, 56 bytes removed

/tmp/ipv6.ko.after:
 5 functions changed, 2 bytes added, 135 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:58 -08:00
Arnaldo Carvalho de Melo c67862403e [TCP] minisocks: Use kmemdup and LIMIT_NETDEBUG 
Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/tcp_minisocks.o.before /tmp/tcp_minisocks.o.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/tcp_minisocks.c:
  tcp_check_req |  -44
 1 function changed, 44 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:57 -08:00
Arnaldo Carvalho de Melo 42e5ea466c [IPV4]: Use kmemdup in net/ipv4/devinet.c 
Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/devinet.o.before /tmp/devinet.o.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/devinet.c:
  devinet_sysctl_register |  -38
 1 function changed, 38 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:56 -08:00
Arnaldo Carvalho de Melo fac5d73151 [NETLABEL]: Use kmemdup in cipso_ipv4.c 
Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/cipso_ipv4.o.before /tmp/cipso_ipv4.o.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/cipso_ipv4.c:
  cipso_v4_cache_add |  -46
 1 function changed, 46 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:55 -08:00
Arnaldo Carvalho de Melo f6685938f9 [TCP_IPV4]: Use kmemdup where appropriate 
Also use a variable to avoid the longish tp->md5sig_info-> use
in tcp_v4_md5_do_add.

Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/tcp_ipv4.o.before /tmp/tcp_ipv4.o.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/tcp_ipv4.c:
  tcp_v4_md5_do_add     |  -62
  tcp_v4_syn_recv_sock  |  -32
  tcp_v4_parse_md5_keys |  -86
 3 functions changed, 180 bytes removed
[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:54 -08:00
Arnaldo Carvalho de Melo 7174259e6c [TCP_IPV4]: CodingStyle cleanups, no code change 
Mostly related to CONFIG_TCP_MD5SIG recent merge.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:53 -08:00
Arnaldo Carvalho de Melo 58a5a7b955 [NET]: Conditionally use bh_lock_sock_nested in sk_receive_skb 
Spotted by Ian McDonald, tentatively fixed by Gerrit Renker:

http://www.mail-archive.com/dccp%40vger.kernel.org/msg00599.html

Rewritten not to unroll sk_receive_skb, in the common case, i.e. no lock
debugging, its optimized away.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:51 -08:00
Arnaldo Carvalho de Melo e523a1550e [DCCP]: One NET_INC_STATS() could be NET_INC_STATS_BH in dccp_v4_err() 
Spotted by Eric Dumazet in tcp_v4_rcv().

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:23:50 -08:00
Arnaldo Carvalho de Melo f6484f7c7a [DCCP] timewait: Remove leftover extern declarations 
Gerrit Renker noticed dccp_tw_deschedule and submitted a patch with a FIXME,
but as he suggests in the same patch the best thing is to just ditch this
declaration, while doing that also noticed that tcp_tw_count is as well not
defined anywhere, so ditch it too.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-12-02 21:21:57 -08:00
Arnaldo Carvalho de Melo 571d6eee9b [PATCH] Check ieee80211softmac_auth_resp kmalloc result 
And use kmemdup and kzalloc where applicable

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
 2006-12-02 00:12:05 -05:00
Arnaldo Carvalho de Melo 8ca0d17bd7 [DCCP] feat: Pass dccp_minisock ptr where only the minisock is used 
This is in preparation for having a dccp_minisock embedded into
dccp_request_sock so that feature negotiation can be done prior to
creating the full blown dccp_sock.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:51:53 -08:00
Arnaldo Carvalho de Melo a4bf390242 [DCCP] minisock: Rename struct dccp_options to struct dccp_minisock 
This will later be included in struct dccp_request_sock so that we can
have per connection feature negotiation state while in the 3way
handshake, when we clone the DCCP_ROLE_LISTEN socket (in
dccp_create_openreq_child) we'll just copy this state from
dreq_minisock to dccps_minisock.

Also the feature negotiation and option parsing code will mostly touch
dccps_minisock, which will simplify some stuff.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:50:58 -08:00
Arnaldo Carvalho de Melo 543d9cfeec [NET]: Identation & other cleanups related to compat_[gs]etsockopt cset 
No code changes, just tidying up, in some cases moving EXPORT_SYMBOLs
to just after the function exported, etc.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:48:35 -08:00
Arnaldo Carvalho de Melo f94691acf9 [SK_BUFF]: export skb_pull_rcsum 
*** Warning: "skb_pull_rcsum" [net/bridge/bridge.ko] undefined!
*** Warning: "skb_pull_rcsum" [net/8021q/8021q.ko] undefined!
*** Warning: "skb_pull_rcsum" [drivers/net/pppoe.ko] undefined!
*** Warning: "skb_pull_rcsum" [drivers/net/ppp_generic.ko] undefined!

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:47:55 -08:00
Arnaldo Carvalho de Melo c841aa0304 [SECURITY] getpeersec: Fix build breakage 
A recent changeset removes dummy_socket_getpeersec, replacing it with
two new functions, but still references the removed function in the
security_fixup_ops table, fix it by doing the replacement operation in
the fixup table too.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:47:37 -08:00
Arnaldo Carvalho de Melo e35fc38565 [INFINIBAND] ipoib: Remove leftover use of neigh_ops->destructor 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:46:40 -08:00
Arnaldo Carvalho de Melo dec73ff029 [ICSK] compat: Introduce inet_csk_compat_[gs]etsockopt 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:46:16 -08:00
Arnaldo Carvalho de Melo d1d47beef8 [SNAP]: Remove leftover unused hdr variable 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:45:37 -08:00
Arnaldo Carvalho de Melo 2d0817d11e [DCCP] options: Make dccp_insert_options & friends yell on error 
And not the silly LIMIT_NETDEBUG and silently return without inserting
the option requested.

Also drop some old debugging messages associated to option insertion.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:32:06 -08:00
Arnaldo Carvalho de Melo 110bae4efb [DCCP]: Remove leftover dccp_send_response prototype 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:31:46 -08:00
Arnaldo Carvalho de Melo c5fed1597e [DCCP]: ditch dccp_v[46]_ctl_send_ack 
Merging it with its only user: dccp_v[46]_reqsk_send_ack.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:31:26 -08:00
Arnaldo Carvalho de Melo 118b2c9532 [DCCP]: Use sk->sk_prot->max_header consistently for non-data packets 
Using this also provides opportunities for introducing
inet_csk_alloc_skb that would call alloc_skb, account it to the sock
and skb_reserve(max_header), but I'll leave this for later, for now
using sk_prot->max_header consistently is enough.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:31:09 -08:00
Arnaldo Carvalho de Melo e5a6de915b [DCCP] options: Fix handling of ackvecs in DATA packets 
I.e. they should be just ignored, but we have to use 'break', not 'continue',
as we have to possibly reset the mandatory flag.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:30:51 -08:00
Arnaldo Carvalho de Melo 6df9424a9c [DCCP] options: Fix some aspects of mandatory option processing 
According to dccp draft (draft-ietf-dccp-spec-13.txt) section 5.8.2
(Mandatory Option) the following patch correct the handling of the
following cases:

1) "... and any Mandatory options received on DCCP-Data packets MUST be
  ignored."

2) "The connection is in error and should be reset with Reset Code 5, ...
  if option O is absent (Mandatory was the last byte of the option list), or
  if option O equals Mandatory."

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Hagen Paul Pfeifer <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:06:02 -08:00
Arnaldo Carvalho de Melo c0c736db7e [DCCP] ccid2: coding style cleanups 
No changes in the logic where made.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:05:37 -08:00
Arnaldo Carvalho de Melo 45329e71ee [DCCP] ipv6: cleanups 
No changes in the logic were made, just removing trailing whitespaces,
etc.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:01:29 -08:00
Arnaldo Carvalho de Melo c4d9390941 [ICSK]: Introduce inet_csk_ctl_sock_create 
Consolidating open coded sequences in tcp and dccp, v4 and v6.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:01:03 -08:00
Arnaldo Carvalho de Melo 7247887357 [DCCP] ipv6: Add missing ipv6 control socket 
I guess I forgot to add it, nah, now it just works:

18:04:33.274066 IP6 ::1.1476 > ::1.5001: request (service=0)
18:04:33.334482 IP6 ::1.5001 > ::1.1476: reset (code=bad_service_code)

Ditched IP_DCCP_UNLOAD_HACK, as now we would have to do it for both
IPv6 and IPv4, so I'll come up with another way for freeing the
control sockets in upcoming changesets.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 22:00:37 -08:00
Arnaldo Carvalho de Melo c25a18ba34 [DCCP]: Uninline some functions 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:58:56 -08:00
Arnaldo Carvalho de Melo 2e1f47c74c [LLC]: Fix sap refcounting 
Thanks to Leslie Harlley Watter <[email protected]> for reporting the
problem an testing this patch.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:28:11 -08:00
Arnaldo Carvalho de Melo 2342c990bb [LLC]: Replace __inline__ with inline 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:27:43 -08:00
Arnaldo Carvalho de Melo 9c005e018c [LLC]: Fix struct proto .name 
Cut'n'paste error from ddp_proto.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:27:23 -08:00
Arnaldo Carvalho de Melo b61fafc4ef [DCCP]: Move the IPv4 specific bits from proto.c to ipv4.c 
With this patch in place we can break down the complexity by better
compartmentalizing the code that is common to ipv6 and ipv4.

Now we have these modules:
Module                  Size  Used by
dccp_diag               1344  0
inet_diag               9448  1 dccp_diag
dccp_ccid3             15856  0
dccp_tfrc_lib          12320  1 dccp_ccid3
dccp_ccid2              5764  0
dccp_ipv4              16996  2
dccp                   48208  4 dccp_diag,dccp_ccid3,dccp_ccid2,dccp_ipv4

dccp_ipv6 still requires dccp_ipv4 due to dccp_ipv6_mapped, that is
the next target to work on the "hey, ipv4 is legacy, I only want ipv6
dude!" direction.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:25:11 -08:00
Arnaldo Carvalho de Melo 46f09ffa7d [DCCP]: Rename init_dccp_v4_mibs to dccp_mib_init 
And introduce dccp_mib_exit grouping previously open coded sequence.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:24:42 -08:00
Arnaldo Carvalho de Melo 075ae86611 [DCCP]: Move dccp_hashinfo from ipv4.c to the core 
As it is used by both ipv4 and ipv6.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:24:19 -08:00
Arnaldo Carvalho de Melo 0a1ec676dd [DCCP]: Dont use dccp_v4_checksum in dccp_make_response 
dccp_make_response is shared by ipv4/6 and the ipv6 code was
recalculating the checksum, not good, so move the dccp_v4_checksum
call to dccp_v4_send_response.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:23:59 -08:00
Arnaldo Carvalho de Melo c985ed705f [DCCP]: Move dccp_[un]hash from ipv4.c to the core 
As this is used by both ipv4 and ipv6 and is not ipv4 specific.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:23:39 -08:00
Arnaldo Carvalho de Melo 3e0fadc51f [DCCP]: Move dccp_v4_{init,destroy}_sock to the core 
Removing one more ipv6 uses ipv4 stuff case in dccp land.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 21:23:15 -08:00
Arnaldo Carvalho de Melo 017487d7d1 [DCCP]: Generalize dccp_v4_send_reset 
Renaming it to dccp_send_reset and moving it from the ipv4 specific
code to the core dccp code.

This fixes some bugs in IPV6 where timers would send v4 resets, etc.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 19:25:24 -08:00
Arnaldo Carvalho de Melo e55d912f5b [DCCP] feat: Introduce sysctls for the default features 
[root@qemu ~]# for a in /proc/sys/net/dccp/default/* ; do echo $a ; cat $a ; done
/proc/sys/net/dccp/default/ack_ratio
2
/proc/sys/net/dccp/default/rx_ccid
3
/proc/sys/net/dccp/default/send_ackvec
1
/proc/sys/net/dccp/default/send_ndp
1
/proc/sys/net/dccp/default/seq_window
100
/proc/sys/net/dccp/default/tx_ccid
3
[root@qemu ~]#

So if wanting to test ccid3 as the tx CCID one can just do:

[root@qemu ~]# echo 3 > /proc/sys/net/dccp/default/tx_ccid
[root@qemu ~]# echo 2 > /proc/sys/net/dccp/default/rx_ccid
[root@qemu ~]# cat /proc/sys/net/dccp/default/[tr]x_ccid
2
3
[root@qemu ~]#

Of course we also need the setsockopt for each app to tell its preferences, but
for testing or defining something other than CCID2 as the default for apps that
don't explicitely set their preference the sysctl interface is handy.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 19:25:02 -08:00
Arnaldo Carvalho de Melo 04e2661e9c [DCCP]: Call dccp_feat_init more early in dccp_v4_init_sock 
So that dccp_feat_clean doesn't get confused with uninitialized
list_heads.

Noticed when testing with no ccid kernel modules.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 19:24:41 -08:00
Arnaldo Carvalho de Melo 057fc6755a [DCCP]: Kconfig tidy up 
Make CCID2 and CCID3 default to what was selected for DCCP and use the
standard short description for the CCIDs (TCP-Like & TCP-Friendly).

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 19:24:22 -08:00
Arnaldo Carvalho de Melo 93ce20928f [DCCP]: Make CCID2 be the default 
As per the draft. This fixes the build when netfilter dccp components
are built and dccp isn't. Thanks to Reuben Farrelly for reporting
this.

The following changesets will introduce /proc/sys/net/dccp/defaults/
to give more flexibility to DCCP developers and testers while apps
doesn't use setsockopt to specify the desired CCID, etc.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 19:23:58 -08:00
Arnaldo Carvalho de Melo 91f0ebf7b6 [DCCP] CCID: Improve CCID infrastructure 
1. No need for ->ccid_init nor ->ccid_exit, this is what module_{init,exit}
   does and anynways neither ccid2 nor ccid3 were using it.

2. Rename struct ccid to struct ccid_operations and introduce struct ccid
   with a pointer to ccid_operations and rigth after it the rx or tx
   private state.

3. Remove the pointer to the state of the half connections from struct
   dccp_sock, now its derived thru ccid_priv() from the ccid pointer.

Now we also can implement the setsockopt for changing the CCID easily as
no ccid init routines can affect struct dccp_sock in any way that prevents
other CCIDs from working if a CCID switch operation is asked by apps.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 19:21:44 -08:00
Arnaldo Carvalho de Melo aa5d7df3b2 [DCCP] CCID3: Set the no_feedback_timer fields near init_timer 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:35:13 -08:00
Arnaldo Carvalho de Melo 9833d6da00 [DCCP]: Don't alloc ack vector for the control sock 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:34:53 -08:00
Arnaldo Carvalho de Melo d5e9b2c737 [DCCP] ackvec: Delete all the ack vector records in dccp_ackvec_free 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:20:46 -08:00
Arnaldo Carvalho de Melo 411447019a [DCCP] CCID: Allow ccid_{init,exit} to be NULL 
Testing if the ccid being instantiated has these methods in
ccid_init().

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:20:23 -08:00
Arnaldo Carvalho de Melo e229c2fb33 [LIST]: Introduce list_for_each_entry_from 
For iterating over list of given type continuing from existing point.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:19:17 -08:00
Arnaldo Carvalho de Melo d8dcffee86 [LIST]: Introduce list_for_each_entry_safe_from 
For iterate over list of given type from existing point safe against removal of
list entry.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:18:05 -08:00
Arnaldo Carvalho de Melo 9b07ef5dda [DCCP] ackvec: Introduce dccp_ackvec_slab 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:16:17 -08:00
Arnaldo Carvalho de Melo fa23e2ecd3 [DCCP]: Fix error handling in dccp_init 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:16:01 -08:00
Arnaldo Carvalho de Melo 7400d78110 [DCCP] ackvec: Ditch dccpav_buf_len 
Simplifying the code a bit as we're always using DCCP_MAX_ACKVEC_LEN.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-03-20 17:15:42 -08:00
Arnaldo Carvalho de Melo ba13c98405 [REQSK]: Don't reset rskq_defer_accept in reqsk_queue_alloc 
In 295f7324ff I moved defer_accept from
tcp_sock to request_queue and mistakingly reset it at reqsl_queue_alloc, causing
calls to setsockopt(TCP_DEFER_ACCEPT ) to be lost after bind, the fix is to
remove the zeroing of rskq_defer_accept from reqsl_queue_alloc.

Thanks to Alexandra N. Kossovsky <[email protected]> for
reporting and testing the suggested fix.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-02-27 13:30:43 -08:00
Arnaldo Carvalho de Melo 0d615ec2bb sundance: Really read addr 0 
Make phy 0 actually be read, as it is not being right now as we have:

              int mii_status = mdio_read(dev, phy, MII_BMSR);
              int phyx = phy & 0x1f;

When we should have instead:

              int phyx = phy & 0x1f;
              int mii_status = mdio_read(dev, phyx, MII_BMSR);

so that when phy, in the end of the (phy = 1; phy <= 32...) loop gets
to 32 phyx gets to 0, i.e. we were reading at 32, when the intended
read was for 0.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>
 2006-01-26 22:01:38 -05:00
Arnaldo Carvalho de Melo dff2c03534 [INET_DIAG]: Introduce sk_diag_fill 
To be called from inet_diag_get_exact, also rename inet_diag_fill to
inet_csk_diag_fill, for consistency with inet_twsk_diag_fill.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-09 14:56:56 -08:00
Arnaldo Carvalho de Melo c7d58aabdc [INET_DIAG]: Introduce inet_twsk_diag_dump & inet_twsk_diag_fill 
To properly dump TIME_WAIT sockets and to reduce complexity a bit by
having per socket class accessor routines.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-09 14:56:38 -08:00
Arnaldo Carvalho de Melo 4e852c0279 [INET_DIAG]: whitespace/simple cleanups 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-09 14:56:19 -08:00
Arnaldo Carvalho de Melo 7dbf075524 [INET_DIAG]: Use inet_twsk() with TIME_WAIT sockets 
The fields being accessed in inet_diag_dump are outside sock_common, the
common part of struct sock and struct inet_timewait_sock.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-09 14:56:03 -08:00
Arnaldo Carvalho de Melo f190055ff5 [IPVS]: Add missing include <linux/net.h> 
CC [M]  net/ipv4/ipvs/ip_vs_conn.o
  /pub/scm/linux/kernel/git/acme/net-2.6/net/ipv4/ipvs/ip_vs_conn.c: In
  function 'ip_vs_conn_new':
  /pub/scm/linux/kernel/git/acme/net-2.6/net/ipv4/ipvs/ip_vs_conn.c:606:
  warning: implicit declaration of function 'net_ratelimit'
  /pub/scm/linux/kernel/git/acme/net-2.6/net/ipv4/ipvs/ip_vs_conn.c: In
  function 'ip_vs_random_dropentry':
  /pub/scm/linux/kernel/git/acme/net-2.6/net/ipv4/ipvs/ip_vs_conn.c:810:
  warning: implicit declaration of function 'net_random'

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-01-04 02:02:20 -02:00
Arnaldo Carvalho de Melo 80e40daa47 [TCP]: syn_flood_warning is only needed if CONFIG_SYN_COOKIES is selected 
CC      net/ipv4/tcp_ipv4.o
  /pub/scm/linux/kernel/git/acme/net-2.6/net/ipv4/tcp_ipv4.c:665: warning:
  'syn_flood_warning' defined but not used

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-01-04 01:58:06 -02:00
Arnaldo Carvalho de Melo e4dfd449c8 [DCCP] ackvec: use u8 for the buf offsets 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
 2006-01-04 01:46:34 -02:00
Arnaldo Carvalho de Melo 8639a11e23 [TCP]: Don't use __constant_htonl for a non const arg 
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:11:22 -08:00
Arnaldo Carvalho de Melo 14c850212e [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 
To help in reducing the number of include dependencies, several files were
touched as they were getting needed headers indirectly for stuff they use.

Thanks also to Alan Menegotto for pointing out that net/dccp/proto.c had
linux/dccp.h include twice.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:11:21 -08:00
Arnaldo Carvalho de Melo 25995ff577 [SOCK]: Introduce sk_receive_skb 
Its common enough to to justify that, TCP still can't use it as it has the
prequeueing stuff, still to be made generic in the not so distant future :-)

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:11:19 -08:00
Arnaldo Carvalho de Melo d83d8461f9 [IP_SOCKGLUE]: Remove most of the tcp specific calls 
As DCCP needs to be called in the same spots.

Now we have a member in inet_sock (is_icsk), set at sock creation time from
struct inet_protosw->flags (if INET_PROTOSW_ICSK is set, like for TCP and
DCCP) to see if a struct sock instance is a inet_connection_sock for places
like the ones in ip_sockglue.c (v4 and v6) where we previously were looking if
sk_type was SOCK_STREAM, that is insufficient because we now use the same code
for DCCP, that has sk_type SOCK_DCCP.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:58 -08:00
Arnaldo Carvalho de Melo 2271281362 [TCP]: Move the TCPF_ enum to tcp_states.h 
Upcoming patches will make, for instance, ip_sockglue.c need just this enum
and not all of tcp.h.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:57 -08:00
Arnaldo Carvalho de Melo d8313f5ca2 [INET6]: Generalise tcp_v6_hash_connect 
Renaming it to inet6_hash_connect, making it possible to ditch
dccp_v6_hash_connect and share the same code with TCP instead.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:56 -08:00
Arnaldo Carvalho de Melo a7f5e7f164 [INET]: Generalise tcp_v4_hash_connect 
Renaming it to inet_hash_connect, making it possible to ditch
dccp_v4_hash_connect and share the same code with TCP instead.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:55 -08:00
Arnaldo Carvalho de Melo 6d6ee43e0b [TWSK]: Introduce struct timewait_sock_ops 
So that we can share several timewait sockets related functions and
make the timewait mini sockets infrastructure closer to the request
mini sockets one.

Next changesets will take advantage of this, moving more code out of
TCP and DCCP v4 and v6 to common infrastructure.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:54 -08:00
Arnaldo Carvalho de Melo fc44b98053 [DCCP]: Use reqsk_free in dccp_v4_conn_request 
Now we have the destructor (dccp_v4_reqsk_destructor) in our
request_sock_ops vtable.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:53 -08:00
Arnaldo Carvalho de Melo 3df80d9320 [DCCP]: Introduce DCCPv6 
Still needs mucho polishing, specially in the checksum code, but works
just fine, inet_diag/iproute2 and all 8)

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:52 -08:00
Arnaldo Carvalho de Melo 399c07def6 [IPV6]: Export ipv6_opt_accepted 
It was already non-TCP specific, will be used by DCCPv6.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:51 -08:00
Arnaldo Carvalho de Melo f21e68caa0 [DCCP]: Prepare the AF agnostic core for the introduction of DCCPv6 
Basically exports a similar set of functions as the one exported by
the non-AF specific TCP code.

In the process moved some non-AF specific code from dccp_v4_connect to
dccp_connect_init and moved the checksum verification from
dccp_invalid_packet to dccp_v4_rcv, so as to use it in dccp_v6_rcv
too.

Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
 2006-01-03 13:10:50 -08:00