qemu-kvm calls iscsi_parse_url_full() with iscsi = NULL.
In case there is an invalid URL specified qemu-kvm segfaults when
it tries to set iscsi->error_string.
I tried to patch this in qemu-kvm, but the initiator_name is dirived
from the target name so this seemed to be the easier approach.
the write command is limited in the sense that file offset and
count bytes must be multiple of the targets blocksize. for most
copy/dd etc. operations this is sufficient to work.
This patch adds logarithmic malloc behaviour to iscsi_add_data().
Currently for each new call there is a new buffer allocated
and all old data is copied to the new buffer. Change this by
allocating at least PAGE_SIZE bytes and increase the allocation
by powers of 2 each time it does no longer fit.
The iscsi_url and iscsi_context might contain clear text
login credentials for an iscsi target. As Linux zeroes
on allocate this data might remain in memory for a long
time.
This patch adds a wrapper around all memory allocations and frees.
The idea is to get warned immediately if the application leaks memory.
Additionally the wrapper functions make it easy to add different
memory allocators or memory pools in the future.
old_first_burst_len is set but never used - remove it. Also replace an
if (!ptr)
free(ptr)
with
free(ptr)
as the check is redundant.
Signed-off-by: Arne Redlich <arne.redlich@googlemail.com>
* mark unused parameter as such
* wrap parens around a bitop
* remove unused labels
* fix error messages
Signed-off-by: Arne Redlich <arne.redlich@googlemail.com>
gcc-4.6.3 warned about this one on several occasions:
gcc -DHAVE_CONFIG_H -I. -I. -I./include "-D_U_=__attribute__((unused))" -I./test-tool -Wall -W -Wshadow -Wstrict-prototypes -Wpointer-arith -Wcast-align -Wwrite-strings -ggdb3 -O0 -MT test-tool/bin_iscsi_test-0000_testunitready_simple.o -MD -MP -MF test-tool/.deps/bin_iscsi_test-0000_testunitready_simple.Tpo -c -o test-tool/bin_iscsi_test-0000_testunitready_simple.o `test -f 'test-tool/0000_testunitready_simple.c' || echo './'`test-tool/0000_testunitready_simple.c
test-tool/0000_testunitready_simple.c: In function 'T0000_testunitready_simple':
test-tool/0000_testunitready_simple.c:23:44: warning: declaration of 'initiator' shadows a global declaration [-Wshadow]
test-tool/iscsi-test.h:20:20: warning: shadowed declaration is here [-Wshadow]
For now the global initiator is renamed to initiatorname1 (and initiator2 is
renamed to initiatorname2, respectively), but ultimately the globals should
probably go away.
While fixing this it also became apparent that initiator-name-2 was parsed
into the "initiator" variable as well.
Signed-off-by: Arne Redlich <arne.redlich@googlemail.com>
Quoth gcc-4.6.3:
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I. -I./include "-D_U_=__attribute__((unused))" -Wall -W -Wshadow -Wstrict-prototypes -Wpointer-arith -Wcast-align -Wwrite-strings -g -O2 -MT lib/socket.lo -MD -MP -MF lib/.deps/socket.Tpo -c lib/socket.c -fPIC -DPIC -o lib/.libs/socket.o
lib/socket.c:445:1: warning: 'inline' is not at beginning of declaration [-Wold-style-declaration]
Fix this and make it a static function.
Also remove trailing whitespace from this file while at it.
Signed-off-by: Arne Redlich <arne.redlich@googlemail.com>
gcc-4.6.3 reports these:
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I. -I./include "-D_U_=__attribute__((unused))" -Wall -W -Wshadow -Wstrict-prototypes -Wpointer-arith -Wcast-align -Wwrite-strings -g -O2 -MT lib/init.lo -MD -MP -MF lib/.deps/init.Tpo -c lib/init.c -fPIC -DPIC -o lib/.libs/init.o
lib/init.c: In function 'iscsi_parse_url':
lib/init.c:410:18: warning: 'l' may be used uninitialized in this function [-Wuninitialized]
lib/init.c:409:10: warning: 'target' may be used uninitialized in this function [-Wuninitialized]
Both warnings appear to be spurious though, as both "target" and "l" are only used if
"full" is set, which implies that these are initialized before.
Signed-off-by: Arne Redlich <arne.redlich@googlemail.com>
