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r275358:
Start process of removing the use of the deprecated "M_FLOWID" flag
from the FreeBSD network code. The flag is still kept around in the
"sys/mbuf.h" header file, but does no longer have any users. Instead
the "m_pkthdr.rsstype" field in the mbuf structure is now used to
decide the meaning of the "m_pkthdr.flowid" field. To modify the
"m_pkthdr.rsstype" field please use the existing "M_HASHTYPE_XXX"
macros as defined in the "sys/mbuf.h" header file.
This patch introduces new behaviour in the transmit direction.
Previously network drivers checked if "M_FLOWID" was set in "m_flags"
before using the "m_pkthdr.flowid" field. This check has now now been
replaced by checking if "M_HASHTYPE_GET(m)" is different from
"M_HASHTYPE_NONE". In the future more hashtypes will be added, for
example hashtypes for hardware dedicated flows.
"M_HASHTYPE_OPAQUE" indicates that the "m_pkthdr.flowid" value is
valid and has no particular type. This change removes the need for an
"if" statement in TCP transmit code checking for the presence of a
valid flowid value. The "if" statement mentioned above is now a direct
variable assignment which is then later checked by the respective
network drivers like before.
r275483:
Remove M_FLOWID from SCTP code.
r276982:
Remove no longer used "M_FLOWID" flag from mbuf.h and update the netisr
manpage.
Note: The FreeBSD version has been bumped.
Reviewed by: hps, tuexen
Sponsored by: Limelight Networks
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svn 275358 (M_FLOWID deprecation, only a couple of lines)
which cannot be merged.
if_lem_netmap.h, if_re_netmap.h:
- use the same (commented out) function to update the stat counters
as in HEAD. This is a no-op here
netmap.c
- merge 274459 (support for private knote lock)
and minor changes on nm_config and comments
netmap_freebsd.c
- merge 274459 (support for private knote lock)
- merge 274354 (initialize color if passed as argument)
netmap_generic.c
- fix a comment
netmap_kern.h
- revise the lock macros, using sx locks;
merge 274459 (private knote lock)
netmap_monitor.c
- use full memory barriers
netmap_pipe.c
- use full memory barriers, use length from the correct queue
(mostly cosmetic, since the queues typically have the same size)
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(vtnet and cxgbe not merged yet because we need some other mfc first)
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- fix handling of tx mbufs in emulated netmap mode;
- introduce mbq_lock() and mbq_unlock()
- rate limit some error messages
- many whitespace and comment fixes
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