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Pablo Neira Ayuso ff491a7334 netlink: change return-value logic of netlink_broadcast() 
Currently, netlink_broadcast() reports errors to the caller if no
messages at all were delivered:

1) If, at least, one message has been delivered correctly, returns 0.
2) Otherwise, if no messages at all were delivered due to skb_clone()
   failure, return -ENOBUFS.
3) Otherwise, if there are no listeners, return -ESRCH.

With this patch, the caller knows if the delivery of any of the
messages to the listeners have failed:

1) If it fails to deliver any message (for whatever reason), return
   -ENOBUFS.
2) Otherwise, if all messages were delivered OK, returns 0.
3) Otherwise, if no listeners, return -ESRCH.

In the current ctnetlink code and in Netfilter in general, we can add
reliable logging and connection tracking event delivery by dropping the
packets whose events were not successfully delivered over Netlink. Of
course, this option would be settable via /proc as this approach reduces
performance (in terms of filtered connections per seconds by a stateful
firewall) but providing reliable logging and event delivery (for
conntrackd) in return.

This patch also changes some clients of netlink_broadcast() that
may report ENOBUFS errors via printk. This error handling is not
of any help. Instead, the userspace daemons that are listening to
those netlink messages should resync themselves with the kernel-side
if they hit ENOBUFS.

BTW, netlink_broadcast() clients include those that call
cn_netlink_send(), nlmsg_multicast() and genlmsg_multicast() since they
internally call netlink_broadcast() and return its error value.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-05 23:56:36 -08:00
..
aacraid [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
aic7xxx [SCSI] aic7xxx: Take the LED out of diagnostic mode on PM resume 2008-10-23 11:42:16 -05:00
aic7xxx_old
aic94xx [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
arcmsr [SCSI] advansys, arcmsr, ipr, nsp32, qla1280, stex: use pci_ioremap_bar() 2008-12-29 11:24:11 -06:00
arm [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
cxgb3i cxgb3: Replace LRO with GRO 2009-01-21 14:39:13 -08:00
device_handler [SCSI] scsi_dh_rdac: Add LSI vendor and product ids in rdac device list 2008-12-29 11:24:17 -06:00
dpt removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
fcoe [SCSI] fcoe: fix incorrect use of struct module 2008-12-30 13:08:37 -06:00
ibmvscsi [SCSI] ibmvfc: Fix DMA mapping leak on memory allocation failure 2009-01-25 08:14:53 -06:00
libfc [SCSI] libfc: A modular Fibre Channel library 2008-12-29 11:24:33 -06:00
libsas [libata] get-identity ioctl: Fix use of invalid memory pointer 2009-01-16 10:17:09 -05:00
lpfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-01-08 16:27:31 -08:00
megaraid [SCSI] megaraid_sas: switch to block timeout 2008-12-01 11:15:55 -06:00
pcmcia [SCSI] aha152x_cs: Fix regression that keeps driver from using shared interrupts 2009-01-05 12:17:42 -06:00
qla2xxx [SCSI] qla2xxx: Update version number to 8.03.00-k2. 2009-01-25 07:59:31 -06:00
qla4xxx [SCSI] qla4xxx: do not reuse session when connecting to different target port 2009-01-25 07:55:13 -06:00
sym53c8xx_2 block: unify request timeout handling 2008-10-09 08:56:13 +02:00
.gitignore [SCSI] 53c7xx: fix removal fallout 2008-01-11 18:22:30 -06:00
3w-9xxx.c [SCSI] 3w-9xxx: remove unnecessary local_irq_save/restore for scsi sg copy API 2008-10-23 11:42:18 -05:00
3w-9xxx.h [SCSI] 3w-9xxx: add MSI support and misc fixes 2008-07-26 15:15:00 -04:00
3w-xxxx.c [SCSI] 3w-xxxx: remove unnecessary local_irq_save/restore for scsi sg copy API 2008-10-23 11:42:17 -05:00
3w-xxxx.h
53c700.c [SCSI] Let scsi_cmnd->cmnd use request->cmd buffer 2008-05-02 10:18:22 -05:00
53c700.h
53c700.scr
53c700_d.h_shipped
a100u2w.c trivial: Fix misspelling of "firmware" in a100u2w.c 2009-01-06 11:28:08 +01:00
a100u2w.h
a2091.c [SCSI] a2091, gvp11: kill warn_unused_result warnings 2009-01-02 12:16:18 -06:00
a2091.h
a3000.c [SCSI] WD33C93: let platform stub override no_sync/fast/dma_mode 2008-04-07 12:19:01 -05:00
a3000.h
a4000t.c
advansys.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
aha152x.c drivers/scsi: use nr_irqs 2008-10-16 16:52:06 +02:00
aha152x.h
aha1542.c [SCSI] aha1542: minor irq handler cleanups 2008-04-27 12:19:55 -05:00
aha1542.h
aha1740.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
aha1740.h
aic7xxx_old.c Remove pointless casts from void pointers 2008-02-06 10:41:01 -08:00
atari_NCR5380.c [SCSI] atari_NCR5380, sun3_NCR5380: operator precedence fix 2008-01-11 18:28:57 -06:00
atari_scsi.c m68k: Remove the broken Hades support 2008-10-14 10:23:27 -07:00
atari_scsi.h
atp870u.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
atp870u.h
BusLogic.c [SCSI] BusLogic: make FlashPoint support x86-32 only 2008-04-07 12:15:44 -05:00
BusLogic.h [SCSI] BusLogic: make FlashPoint support x86-32 only 2008-04-07 12:15:44 -05:00
bvme6000_scsi.c
ch.c [SCSI] add residual argument to scsi_execute and scsi_execute_req 2008-12-29 11:24:24 -06:00
constants.c [SCSI] scsi: add transport host byte errors (v3) 2008-10-13 09:28:48 -04:00
dc395x.c [SCSI] Remove random noop unchecked_isa_dma users 2008-04-07 12:15:40 -05:00
dc395x.h
dmx3191d.c
dpt_i2o.c [SCSI] dpt_i2o: fix transferred data length for scsi_set_resid() 2008-11-15 11:10:14 -06:00
dpti.h drivers/scsi/dpt_i2o.c: fix build on alpha 2008-05-08 10:46:56 -07:00
dtc.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
dtc.h
eata.c [SCSI] eata: fix the data buffer accessors conversion regression 2008-12-29 11:24:35 -06:00
eata_generic.h
eata_pio.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
eata_pio.h
esp_scsi.c [SCSI] esp_scsi: Use DIV_ROUND_UP 2008-12-29 11:24:14 -06:00
esp_scsi.h sparc: Kill SBUS DVMA layer. 2008-08-29 02:13:10 -07:00
fd_mcs.c [SCSI] fd_mcs: convert to accessors and !use_sg cleanup 2008-01-11 18:22:35 -06:00
fdomain.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
fdomain.h
FlashPoint.c [SCSI] FlashPoint: fix off-by-one errors 2008-04-27 12:19:55 -05:00
g_NCR5380.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
g_NCR5380.h
g_NCR5380_mmio.c
gdth.c gdth section fixes 2008-11-30 10:03:36 -08:00
gdth.h block: unify request timeout handling 2008-10-09 08:56:13 +02:00
gdth_ioctl.h
gdth_proc.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
gdth_proc.h block: unify request timeout handling 2008-10-09 08:56:13 +02:00
gvp11.c [SCSI] a2091, gvp11: kill warn_unused_result warnings 2009-01-02 12:16:18 -06:00
gvp11.h
hosts.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
hptiop.c remove unnecessary <linux/hdreg.h> includes 2008-08-05 18:16:58 +02:00
hptiop.h [SCSI] hptiop: add more adapter models and other fixes 2008-01-11 18:28:06 -06:00
ibmmca.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
imm.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
imm.h
in2000.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
in2000.h
initio.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
initio.h [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
ipr.c [libata] get-identity ioctl: Fix use of invalid memory pointer 2009-01-16 10:17:09 -05:00
ipr.h [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
ips.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
ips.h removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
iscsi_tcp.c [SCSI] libiscsi_tcp: support padding offload 2008-12-29 11:24:23 -06:00
iscsi_tcp.h [SCSI] iscsi_tcp: hook iscsi_tcp into new libiscsi_tcp module 2008-12-29 11:24:22 -06:00
jazz_esp.c [SCSI] jazz_esp, sgiwd93, sni_53c710, sun3x_esp: fix platform driver hotplug/coldplug 2008-04-27 12:33:04 -05:00
Kconfig powerpc: Fix iseries drivers build failure without CONFIG_VIOPATH 2009-01-08 16:25:14 +11:00
lasi700.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
libiscsi.c [SCSI] libiscsi: fix iscsi pool leak 2009-01-25 07:54:37 -06:00
libiscsi_tcp.c [SCSI] iscsi_tcp: make padbuf non-static 2009-01-13 10:41:34 -06:00
libsrp.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
mac53c94.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
mac53c94.h
mac_esp.c [SCSI] mac_esp: fix for quadras with two esp chips 2008-12-29 11:24:19 -06:00
mac_scsi.c m68k: machw.h cleanup 2008-12-28 20:00:03 +01:00
mac_scsi.h
Makefile remove ide-scsi 2009-01-02 16:12:51 +01:00
megaraid.c trivial: Fix misspelling of "firmware" in megaraid.c 2009-01-06 11:28:08 +01:00
megaraid.h [SCSI] megaraid: fix mega_internal_command oops 2008-11-05 12:40:23 -05:00
mesh.c [SCSI] SCSI: remove dev->power.power_state from mesh driver 2008-06-05 09:23:44 -05:00
mesh.h
mvme16x_scsi.c
mvme147.c [SCSI] wd33c93: fix up cut and paste error 2008-04-07 12:19:07 -05:00
mvme147.h
mvsas.c [SCSI] mvsas: increase port type detection delay to suit Seagate's 10k6 drive ST3450856SS 0003 2009-01-02 12:10:04 -06:00
ncr53c8xx.c block: unify request timeout handling 2008-10-09 08:56:13 +02:00
ncr53c8xx.h
NCR53c406a.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
NCR5380.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
NCR5380.h
NCR_D700.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32.c [SCSI] advansys, arcmsr, ipr, nsp32, qla1280, stex: use pci_ioremap_bar() 2008-12-29 11:24:11 -06:00
nsp32.h removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
nsp32_debug.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
nsp32_io.h
osst.c device create: scsi: convert device_create_drvdata to device_create 2008-10-16 09:24:44 -07:00
osst.h
osst_detect.h
osst_options.h
pas16.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
pas16.h
ppa.c [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
ppa.h
ps3rom.c powerpc/ps3: Printing fixups for l64 to ll64 conversion drivers/scsi 2009-01-16 16:15:15 +11:00
ql1040_fw.h
ql1280_fw.h
ql12160_fw.h
qla1280.c trivial: Fix misspelling of "firmware" in qla1280.c 2009-01-06 11:28:09 +01:00
qla1280.h [SCSI] qla1280: eliminate wasted space in request and response ring 2007-10-23 12:35:35 -04:00
qlogicfas.c [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
qlogicfas408.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
qlogicfas408.h
qlogicpti.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-10-11 12:39:35 -07:00
qlogicpti.h qlogicpti: Convert to pure OF driver. 2008-08-29 02:14:46 -07:00
qlogicpti_asm.c
raid_class.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
script_asm.pl
scsi.c [SCSI] Skip deleted devices in __scsi_device_lookup_by_target() 2009-01-13 10:48:11 -06:00
scsi.h
scsi_debug.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
scsi_devinfo.c [SCSI] Add SUN Universal Xport to no attach blacklist 2009-01-13 10:45:44 -06:00
scsi_error.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-01-08 16:27:31 -08:00
scsi_ioctl.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
scsi_lib.c [SCSI] scsi_lib: fix DID_RESET status problems 2009-01-07 15:15:44 -06:00
scsi_lib_dma.c
scsi_logging.h
scsi_module.c
scsi_netlink.c [SCSI] fix netlink kernel-doc 2008-10-23 11:42:17 -05:00
scsi_priv.h [SCSI] modify scsi to handle new fail fast flags. 2008-10-13 09:28:52 -04:00
scsi_proc.c [SCSI] scsi_host_lookup: error returns and NULL pointers 2008-10-03 11:46:12 -05:00
scsi_sas_internal.h SCSI: convert struct class_device to struct device 2008-04-19 19:10:33 -07:00
scsi_scan.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-01-08 16:27:31 -08:00
scsi_sysctl.c
scsi_sysfs.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
scsi_tgt_if.c scsi-tgt: BKL pushdown 2008-07-02 15:06:25 -06:00
scsi_tgt_lib.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-10 10:53:26 -07:00
scsi_tgt_priv.h [SCSI] replace __FUNCTION__ with __func__ 2008-07-27 10:31:49 -04:00
scsi_transport_api.h
scsi_transport_fc.c netlink: change return-value logic of netlink_broadcast() 2009-02-05 23:56:36 -08:00
scsi_transport_fc_internal.h
scsi_transport_iscsi.c netlink: change return-value logic of netlink_broadcast() 2009-02-05 23:56:36 -08:00
scsi_transport_sas.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
scsi_transport_spi.c [SCSI] scsi_transport_spi: fix the misuse of scsi_execute return value 2008-12-29 11:24:32 -06:00
scsi_transport_srp.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
scsi_transport_srp_internal.h
scsi_typedefs.h
scsi_wait_scan.c
scsicam.c [SCSI] Add Documentation and integrate into docbook build 2008-01-11 18:22:40 -06:00
sd.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-01-08 16:27:31 -08:00
sd.h [SCSI] sd: fix compile failure with CONFIG_BLK_DEV_INTEGRITY=n 2008-10-15 08:41:28 -04:00
sd_dif.c [SCSI] sd: Correctly handle 6-byte commands with DIX 2009-01-05 09:06:23 -06:00
ses.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
sg.c [SCSI] block: make blk_rq_map_user take a NULL user-space buffer for WRITE 2009-01-02 11:10:35 -06:00
sgiwd93.c [SCSI] sgiwd93: Fix compilation warning 2009-01-02 10:58:41 -06:00
sim710.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
sni_53c710.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
sr.c [SCSI] add residual argument to scsi_execute and scsi_execute_req 2008-12-29 11:24:24 -06:00
sr.h [SCSI] sr: fix test unit ready responses 2008-02-07 18:02:44 -06:00
sr_ioctl.c [SCSI] add residual argument to scsi_execute and scsi_execute_req 2008-12-29 11:24:24 -06:00
sr_vendor.c drivers/scsi/sr_vendor.c: use bcd2bin 2008-10-20 08:52:41 -07:00
st.c [SCSI] st: retry enlarge_buffer allocation 2009-01-02 12:06:52 -06:00
st.h [SCSI] st: remove unused frp_sg_current 2009-01-02 12:02:25 -06:00
st_options.h [SCSI] st: add option to use SILI in variable block reads 2008-04-07 12:15:39 -05:00
stex.c [SCSI] advansys, arcmsr, ipr, nsp32, qla1280, stex: use pci_ioremap_bar() 2008-12-29 11:24:11 -06:00
sun3_NCR5380.c [SCSI] atari_NCR5380, sun3_NCR5380: operator precedence fix 2008-01-11 18:28:57 -06:00
sun3_scsi.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
sun3_scsi.h
sun3_scsi_vme.c [SCSI] sun3_scsi_vme: add MODULE_LICENSE 2008-04-16 09:28:11 -05:00
sun3x_esp.c [SCSI] sun3x_esp: Convert && to || 2008-10-23 11:42:19 -05:00
sun_esp.c sparc: Annotate of_device_id arrays with const or __initdata. 2008-08-31 01:23:17 -07:00
sym53c416.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
sym53c416.h
t128.c [SCSI] NCR5380: Fix bugs and canonicalize irq handler usage 2007-11-25 12:19:26 +02:00
t128.h
tmscsim.c [SCSI] tmscsim: fix indentation and braces disagreement - add braces 2008-12-29 11:24:14 -06:00
tmscsim.h
u14-34f.c [SCSI] u14-34f: fix scsi_dma_map failure case 2008-12-29 11:24:14 -06:00
ultrastor.c scsi: fix integer as NULL pointer warnings 2008-04-28 17:31:13 -07:00
ultrastor.h
wd33c93.c [SCSI] WD33C93: let platform stub override no_sync/fast/dma_mode 2008-04-07 12:19:01 -05:00
wd33c93.h Spelling fix: explicitly 2007-10-19 23:22:55 +02:00
wd7000.c [SCSI] Clean up my email address and use a single standard address for everything 2008-12-29 11:24:12 -06:00
zalon.c [SCSI] struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-02 10:22:16 -06:00
zorro7xx.c m68k: zorro7xx needs <asm/amigahw.h> 2007-11-29 09:24:52 -08:00