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The path of the TDB is known, so calculate the file ID (device number
+ inode number) from it and use this to directly filter /proc/locks to
find processes holding locks.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Don't use the arguments yet. They will be used in a simplified
version of the code.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
1. PID of lock helper waiting for lock
2. Scope of lock: "record" or "db"
3. Path to database that lock helper is trying to lock
4. Whether the database uses mutexes: "mutex" or "fcntl"
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
These were fine (though still lazy) when these tests were the only
user of this stub. However, the ps stub is about to be enhanced, so
fix these uses of it to represent the intended usage.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
The main reason for this is to facilitate testing.
Avoid some /proc accesses entirely by using ps(1) (which can be
replaced by a stub when testing) because this script might as well be
more portable in case anyone wants to add lock debugging for a
non-Linux platform. While the "state" format specification isn't
POSIX-compliant, it works on both Linux and FreeBSD so it is a
reasonable improvement.
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This conflicts with '--log-basename' from the commend cmdline parser.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
nt_name and comment are allocated via talloc_strdup(). Length
is not guaranteed to be sizeof(fstring) and so rather than use
fstrcpy into a possibly NULL buffer, free original string, then
talloc_strdup() the one provided to us.
Signed-off-by: Andrew Walker <awalker@ixsystems.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu May 27 22:07:45 UTC 2021 on sn-devel-184
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu May 27 19:51:57 UTC 2021 on sn-devel-184
Valgrind trace follows.
==3627798== Invalid read of size 1
==3627798== at 0x483FF46: strlen (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==3627798== by 0x55DE412: strdup (strdup.c:41)
==3627798== by 0x4F4657E: smb_xstrdup (util.c:660)
==3627798== by 0x4C62C2E: vfs_ChDir (vfs.c:988)
==3627798== by 0x4C4A51C: process_symlink_open (open.c:656)
==3627798== by 0x4C4ADE7: non_widelink_open (open.c:862)
==3627798== by 0x4C4AFB7: fd_openat (open.c:918)
==3627798== by 0x4BBE895: openat_pathref_fsp (files.c:506)
==3627798== by 0x4C48A00: filename_convert_internal (filename.c:2027)
==3627798== by 0x4C48B77: filename_convert (filename.c:2067)
==3627798== by 0x4C32408: call_trans2qfilepathinfo (trans2.c:6173)
==3627798== by 0x4C3C5DA: handle_trans2 (trans2.c:10143)
==3627798== Address 0xda8bc90 is 96 bytes inside a block of size 217 free'd
==3627798== at 0x483DA3F: free (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==3627798== by 0x4FCA3C9: _tc_free_internal (talloc.c:1222)
==3627798== by 0x4FCA481: _talloc_free_internal (talloc.c:1248)
==3627798== by 0x4FCB825: _talloc_free (talloc.c:1792)
==3627798== by 0xDB248DD: store_cwd_data (vfs_shadow_copy2.c:1473)
==3627798== by 0xDB24BEF: shadow_copy2_chdir (vfs_shadow_copy2.c:1542)
==3627798== by 0x4C662A4: smb_vfs_call_chdir (vfs.c:2257)
==3627798== by 0x4C62B48: vfs_ChDir (vfs.c:940)
==3627798== by 0x4C4A51C: process_symlink_open (open.c:656)
==3627798== by 0x4C4ADE7: non_widelink_open (open.c:862)
==3627798== by 0x4C4AFB7: fd_openat (open.c:918)
==3627798== by 0x4BBE895: openat_pathref_fsp (files.c:506)
==3627798== Block was alloc'd at
==3627798== at 0x483C7F3: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==3627798== by 0x4FC9365: __talloc_with_prefix (talloc.c:783)
==3627798== by 0x4FC94FF: __talloc (talloc.c:825)
==3627798== by 0x4FCCFDC: __talloc_strlendup (talloc.c:2454)
==3627798== by 0x4FCD096: talloc_strdup (talloc.c:2470)
==3627798== by 0xDB24977: store_cwd_data (vfs_shadow_copy2.c:1476)
==3627798== by 0xDB24BEF: shadow_copy2_chdir (vfs_shadow_copy2.c:1542)
==3627798== by 0x4C662A4: smb_vfs_call_chdir (vfs.c:2257)
==3627798== by 0x4C62B48: vfs_ChDir (vfs.c:940)
==3627798== by 0x4C4A92D: non_widelink_open (open.c:755)
==3627798== by 0x4C4AFB7: fd_openat (open.c:918)
==3627798== by 0x4BBE895: openat_pathref_fsp (files.c:506)
==3627798==
Even though SMB_VFS_CONNECTPATH() returns a const char,
vfs_shadow_copy2() can free and reallocate this whilst
in use inside process_symlink_open().
Take a copy to make sure we don't reference free'd memory.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14721
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu May 27 17:25:43 UTC 2021 on sn-devel-184
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue May 25 01:14:09 UTC 2021 on sn-devel-184
The '-V' is already used for '-V|--version' in the common options.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
