PJ40944: FILE SYSTEM STOPPED WORKING
Closed as program error.
See Problem Summary.
APAR NUMBER: PJ40944 PRODUCT: z/TPF FUNCTIONAL AREA: FILE SYSTEM SUPPORT SHIPPED IN PUT: 10 ABSTRACT: Due to PJ30915, when filesystem security support is enabled, possible system outage may occur due to lack of system resources. PACKAGE CONTENTS: Source Segments: (C) base/filesys/tfs/tfs_vnops.c (C) base/filesys/tpf/cpwgr0.c Object Only Binaries: None. Configuration Independent Binaries: (C) base/filesys/obj/cpwgr0.o (C) base/filesys/obj/tfs_vnops.o (C) base/stdlib/libCFVS.so (C) base/stdload/CFVS.so Support Files: base/filesys/lst/cpwgr0.lst base/filesys/lst/CFVS.map base/filesys/lst/tfs_vnops.lst OTHER BINARIES TO BUILD: NO None. COMMENTS: When filesystem security support is enabled, if users are added or removed while a large number of ecbs are accessing the filesystem, the ecbs may start to backup due to the filesystem's internal locking. If this occurs long delays and possible system outage may occur due to lack of system resources.
SOLUTION: The mainline paths in the TFS filesystem (primarily the pathname translation code in tfs_vnops.c) were updated to drive the tfs_iaccess function directly. This avoids costly and unnecessary calls to the filesystem security code that was being done when those mainline paths were driving tfs_iaccess indirectly (via VOP_ACCESS). Secondly, the security support itself, in cpwgr0.c, was updated to alleviate contention for the locks. This avoids having ecbs backup on the lock where the calls to the security support are necessary. COREQS: NO None. MIGRATION CONSIDERATIONS: NO None. BUILD COMMANDS AND INSTRUCTIONS: YES #maketpf commands for linux maketpf -f CFVS cpwgr0.o tfs_vnops.o maketpf CFVS link TPF_VERIFY_LINK_REFS=NO maketpf CFVS link UPDATED INFORMATION UNITS: NO None. See your IBM representative if you need additional information. DOWNLOAD INSTRUCTIONS: http://www.ibm.com/software/htp/tpf/maint/maintztpf.html APAR URL: http://www.ibm.com/software/htp/tpf/ztpfmaint/put10/PJ40944.htm
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NoSpecatt / Xsystem
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