Re: [Samba] 3.6.10 file handle leak under ancient 32-bit kernel
Looking at the good system:
open("log", O_RDONLY|O_DIRECTORY) = 28
fstat(28, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fstat(28, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fcntl(28, F_GETFL) = 0x18000 (flags
O_RDONLY|O_LARGEFILE|O_DIRECTORY)
fcntl(28, F_SETFD, FD_CLOEXEC) = 0
getdents(28, /* 184 entries */, 32768) = 5880
getdents(28, /* 0 entries */, 32768)= 0
close(28) = 0
open(".", O_RDONLY|O_DIRECTORY) = 28
fstat(28, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
close(28) = 0
open("log", O_RDONLY|O_DIRECTORY) = 28
fstat(28, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fstat(28, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fcntl(28, F_GETFL) = 0x18000 (flags
O_RDONLY|O_LARGEFILE|O_DIRECTORY)
fcntl(28, F_SETFD, FD_CLOEXEC) = 0
getdents(28, /* 184 entries */, 32768) = 5880
getdents(28, /* 0 entries */, 32768)= 0
close(28) = 0
Where on the bad system:
open("log", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 509
fstat64(509, {st_mode=S_IFDIR|0751, st_size=4096, ...}) = 0
fcntl64(509, F_SETFD, FD_CLOEXEC) = 0
getdents64(509, /* 129 entries */, 4096) = 4072
getdents64(509, /* 46 entries */, 4096) = 1488
getdents64(509, /* 0 entries */, 4096) = 0
close(509) = 0
open(".", O_RDONLY|O_LARGEFILE|O_DIRECTORY) = 509
fstat64(509, {st_mode=S_IFDIR|0751, st_size=4096, ...}) = 0
close(509) = 0
open("log", O_RDONLY|O_LARGEFILE|O_DIRECTORY) = 509
fstat64(509, {st_mode=S_IFDIR|0751, st_size=4096, ...}) = 0
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Re: [Samba] 3.6.10 file handle leak under ancient 32-bit kernel
Ah, and of course a 'strace'.
http://binnacle.cx/file/smbd_file_leak_strace.txt
The leak appears related to the
open("log")
events where /var/log is opened and
scanned periodically. See three
'open' calls without any matching
close.
Most of the /proc/###/fd entries
are for /var/log, but a couple are
for other files:
# ls -o /proc/15056/fd | sort -k8,8n
.
.
.
lr-x-- 1 root 64 Jan 7 17:48 531 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 532 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 533 -> /w
lr-x-- 1 root 64 Jan 7 17:48 534 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 535 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 536 -> /w/home
lr-x-- 1 root 64 Jan 7 17:48 537 -> /w/home/awle
lr-x-- 1 root 64 Jan 7 17:48 538 -> /w/home/awle
lr-x-- 1 root 64 Jan 7 17:48 539 -> /w/home/awle
lr-x-- 1 root 64 Jan 7 17:48 540 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 541 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 542 -> /var/log
.
.
.
lr-x-- 1 root 64 Jan 7 17:48 572 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 573 -> /var/log
lr-x-- 1 root 64 Jan 7 17:48 574 -> /var/log
lr-x-- 1 root 64 Jan 7 17:49 575 -> /var/log
l-wx-- 1 root 64 Jan 7 17:49 576 ->
/usr/local/samba/var/clientlog/ciannait.log
lr-x-- 1 root 64 Jan 7 17:49 577 -> /var/log
lr-x-- 1 root 64 Jan 7 17:49 578 -> /var/log
lr-x-- 1 root 64 Jan 7 17:49 579 -> /var/log
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Re: [Samba] 3.6.10 file handle leak under ancient 32-bit kernel
Realized that the differences between the 'config.h' files is what really matters--attached below with good/bad order in the pairs. Several likely enough culprits appear in the list and I'm willing to dig around the code. Can anyone suggest which #define is the most probable cause? Thanks < #define HAVE_ATTR_XATTR_H 1 > /* #undef HAVE_ATTR_XATTR_H */ < /* #undef HAVE_BROKEN_POSIX_FALLOCATE */ > #define HAVE_BROKEN_POSIX_FALLOCATE < #define HAVE_FDOPENDIR 1 > /* #undef HAVE_FDOPENDIR */ < #define HAVE_INOTIFY 1 > /* #undef HAVE_INOTIFY */ < #define HAVE_INOTIFY_INIT 1 > /* #undef HAVE_INOTIFY_INIT */ < #define HAVE_KRB5_LOCATE_PLUGIN_H 1 > /* #undef HAVE_KRB5_LOCATE_PLUGIN_H */ < #define HAVE_LINUX_DQBLK_XFS_H 1 > /* #undef HAVE_LINUX_DQBLK_XFS_H */ < #define HAVE_LINUX_FALLOC_H 1 > /* #undef HAVE_LINUX_FALLOC_H */ < #define HAVE_LINUX_INOTIFY_H 1 > /* #undef HAVE_LINUX_INOTIFY_H */ < #define HAVE_LINUX_SPLICE 1 > /* #undef HAVE_LINUX_SPLICE */ < /* #undef HAVE_NFS_QUOTAS */ > #define HAVE_NFS_QUOTAS 1 < #define HAVE_SPLICE_DECL 1 > /* #undef HAVE_SPLICE_DECL */ < #define HAVE_SYS_INOTIFY_H 1 > /* #undef HAVE_SYS_INOTIFY_H */ < /* #undef HAVE_UT_UT_TV */ > #define HAVE_UT_UT_TV 1 < #define HAVE_XFS_QUOTAS 1 > /* #undef HAVE_XFS_QUOTAS */ < #define HAVE___NR_INOTIFY_INIT_DECL 1 > /* #undef HAVE___NR_INOTIFY_INIT_DECL */ < #define SIZEOF_LONG 8 > #define SIZEOF_LONG 4 < #define SIZEOF_SIZE_T 8 > #define SIZEOF_SIZE_T 4 < #define SIZEOF_SSIZE_T 8 > #define SIZEOF_SSIZE_T 4 < #define SIZEOF_TIME_T 8 > /* #undef SIZEOF_TIME_T */ < #define SIZEOF_VOID_P 8 > #define SIZEOF_VOID_P 4 < #define TIME_T_MAX 67768036191676799ll > /* #undef TIME_T_MAX */ -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
