- Apr 04, 2009
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Han, Weidong authored
If queue invalidation is disabled after it's already initialized, dmar_enable_qi won't re-enable it due to iommu->qi is allocated. It may result in system hang when use queue invalidation. Add this check to avoid this case. Signed-off-by:
Weidong Han <weidong.han@intel.com> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com>
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Han, Weidong authored
When extended interrupt mode (x2apic mode) is not supported in a system, it must set compatibility format interrupt to bypass interrupt remapping, otherwise compatibility format interrupts will be blocked. This will be used when interrupt remapping is enabled while x2apic is not supported. Signed-off-by:
Weidong Han <weidong.han@intel.com> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com>
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Fenghua Yu authored
This patch enables suspend/resume for interrupt remapping. During suspend, interrupt remapping is disabled. When resume, interrupt remapping is enabled again. Signed-off-by:
Fenghua Yu <fenghua.yu@intel.com> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com>
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Fenghua Yu authored
This patch supports queued invalidation suspend/resume. Signed-off-by:
Fenghua Yu <fenghua.yu@intel.com> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com>
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Fenghua Yu authored
This patch implements the suspend and resume feature for Intel IOMMU DMAR. It hooks to kernel suspend and resume interface. When suspend happens, it saves necessary hardware registers. When resume happens, it restores the registers and restarts IOMMU by enabling translation, setting up root entry, and re-enabling queued invalidation. Signed-off-by:
Fenghua Yu <fenghua.yu@intel.com> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com>
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David Woodhouse authored
Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com> Acked-by:
Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4Linus Torvalds authored
* 'ext3-latency-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext3: Add replace-on-rename hueristics for data=writeback mode ext3: Add replace-on-truncate hueristics for data=writeback mode ext3: Use WRITE_SYNC for commits which are caused by fsync() block_write_full_page: Use synchronous writes for WBC_SYNC_ALL writebacks
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git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (32 commits) regulator: twl4030 VAUX3 supports 3.0V regulator: Support disabling of unused regulators by machines regulator: Don't increment use_count for boot_on regulators twl4030-regulator: expose VPLL2 regulator: refcount fixes regulator: Don't warn if we failed to get a regulator regulator: Allow boot_on regulators to be disabled by clients regulator: Implement list_voltage for WM835x LDOs and DCDCs twl4030-regulator: list more VAUX4 voltages regulator: Don't warn on omitted voltage constraints regulator: Implement list_voltage() for WM8400 DCDCs and LDOs MMC: regulator utilities regulator: twl4030 voltage enumeration (v2) regulator: twl4030 regulators regulator: get_status() grows kerneldoc regulator: enumerate voltages (v2) regulator: Fix get_mode() for WM835x DCDCs regulator: Allow regulators to set the initial operating mode regulator: Suggest use of datasheet supply or pin names for consumers regulator: email - update email address and regulator webpage. ...
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git://git.infradead.org/iommu-2.6Linus Torvalds authored
* git://git.infradead.org/iommu-2.6: intel-iommu: Fix address wrap on 32-bit kernel. intel-iommu: Enable DMAR on 32-bit kernel. intel-iommu: fix PCI device detach from virtual machine intel-iommu: VT-d page table to support snooping control bit iommu: Add domain_has_cap iommu_ops intel-iommu: Snooping control support Fixed trivial conflicts in arch/x86/Kconfig and drivers/pci/intel-iommu.c
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-fscacheLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-fscache: (41 commits) NFS: Add mount options to enable local caching on NFS NFS: Display local caching state NFS: Store pages from an NFS inode into a local cache NFS: Read pages from FS-Cache into an NFS inode NFS: nfs_readpage_async() needs to be accessible as a fallback for local caching NFS: Add read context retention for FS-Cache to call back with NFS: FS-Cache page management NFS: Add some new I/O counters for FS-Cache doing things for NFS NFS: Invalidate FsCache page flags when cache removed NFS: Use local disk inode cache NFS: Define and create inode-level cache objects NFS: Define and create superblock-level objects NFS: Define and create server-level objects NFS: Register NFS for caching and retrieve the top-level index NFS: Permit local filesystem caching to be enabled for NFS NFS: Add FS-Cache option bit and debug bit NFS: Add comment banners to some NFS functions FS-Cache: Make kAFS use FS-Cache CacheFiles: A cache that backs onto a mounted filesystem CacheFiles: Export things for CacheFiles ...
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git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dmLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (36 commits) dm: set queue ordered mode dm: move wait queue declaration dm: merge pushback and deferred bio lists dm: allow uninterruptible wait for pending io dm: merge __flush_deferred_io into caller dm: move bio_io_error into __split_and_process_bio dm: rename __split_bio dm: remove unnecessary struct dm_wq_req dm: remove unnecessary work queue context field dm: remove unnecessary work queue type field dm: bio list add bio_list_add_head dm snapshot: persistent fix dtr cleanup dm snapshot: move status to exception store dm snapshot: move ctr parsing to exception store dm snapshot: use DMEMIT macro for status dm snapshot: remove dm_snap header dm snapshot: remove dm_snap header use dm exception store: move cow pointer dm exception store: move chunk_fields dm exception store: move dm_target pointer ...
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git://git.open-osd.org/linux-open-osdLinus Torvalds authored
* 'for-linus' of git://git.open-osd.org/linux-open-osd: fs: Add exofs to Kernel build exofs: Documentation exofs: export_operations exofs: super_operations and file_system_type exofs: dir_inode and directory operations exofs: address_space_operations exofs: symlink_inode and fast_symlink_inode operations exofs: file and file_inode operations exofs: Kbuild, Headers and osd utils
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git://oss.sgi.com/xfs/xfsLinus Torvalds authored
* 'for-linus' of git://oss.sgi.com/xfs/xfs: (61 commits) Revert "xfs: increase the maximum number of supported ACL entries" xfs: cleanup uuid handling xfs: remove m_attroffset xfs: fix various typos xfs: pagecache usage optimization xfs: remove m_litino xfs: kill ino64 mount option xfs: kill mutex_t typedef xfs: increase the maximum number of supported ACL entries xfs: factor out code to find the longest free extent in the AG xfs: kill VN_BAD xfs: kill vn_atime_* helpers. xfs: cleanup xlog_bread xfs: cleanup xlog_recover_do_trans xfs: remove another leftover of the old inode log item format xfs: cleanup log unmount handling Fix xfs debug build breakage by pushing xfs_error.h after xfs: include header files for prototypes xfs: make symbols static xfs: move declaration to header file ...
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git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6: (23 commits) parisc: move dereference_function_descriptor to process.c parisc: Move kernel Elf_Fdesc define to <asm/elf.h> parisc: fix build when ARCH_HAS_KMAP parisc: fix "make tar-pkg" parisc: drivers: fix warnings parisc: select BUG always parisc: asm/pdc.h should include asm/page.h parisc: led: remove proc_dir_entry::owner parisc: fix macro expansion in atomic.h parisc: iosapic: fix build breakage parisc: oops_enter()/oops_exit() in die() parisc: document light weight syscall ABI parisc: blink all or loadavg LEDs on oops parisc: add ftrace (function and graph tracer) functionality parisc: simplify sys_clone() parisc: add LATENCYTOP_SUPPORT and CONFIG_STACKTRACE_SUPPORT parisc: allow to build with 16k default kernel page size parisc: expose 32/64-bit capabilities in cpuinfo parisc: use constants instead of numbers in assembly parisc: fix usage of 32bit PTE page table entries on 32bit kernels ...
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git://git.kernel.org/pub/scm/linux/kernel/git/kyle/rtc-pariscLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/kyle/rtc-parisc: powerpc/ps3: Add rtc-ps3 powerpc: Hook up rtc-generic, and kill rtc-ppc m68k: Hook up rtc-generic parisc: rtc: Rename rtc-parisc to rtc-generic parisc: rtc: Add missing module alias parisc: rtc: platform_driver_probe() fixups parisc: rtc: get_rtc_time() returns unsigned int
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6Linus Torvalds authored
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6: udf: Don't write integrity descriptor too often udf: Try anchor in block 256 first udf: Some type fixes and cleanups udf: use hardware sector size udf: fix novrs mount option udf: Fix oops when invalid character in filename occurs udf: return f_fsid for statfs(2) udf: Add checks to not underflow sector_t udf: fix default mode and dmode options handling udf: fix sparse warnings: udf: unsigned last[i] cannot be less than 0 udf: implement mode and dmode mounting options udf: reduce stack usage of udf_get_filename udf: reduce stack usage of udf_load_pvoldesc Fix the udf code not to pass structs on stack where possible. Remove struct typedefs from fs/udf/ecma_167.h et al.
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/rcu-doc-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/rcu-doc-2.6: Doc: Fix spelling in RCU/rculist_nulls.txt. Doc: Fix wrong API example usage of call_rcu(). Doc: Fix missing whitespaces in RCU documentation.
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Akinobu Mita authored
Commit 7ca43e75 ("mm: use debug_kmap_atomic") introduced some debug_kmap_atomic() in wrong places. Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kumar Gala authored
Commit f4112de6 ("mm: introduce debug_kmap_atomic") broke PPC builds with CONFIG_HIGHMEM=y: CC init/main.o In file included from include/linux/highmem.h:25, from include/linux/pagemap.h:11, from include/linux/mempolicy.h:63, from init/main.c:53: arch/powerpc/include/asm/highmem.h: In function 'kmap_atomic_prot': arch/powerpc/include/asm/highmem.h:98: error: implicit declaration of function 'debug_kmap_atomic' In file included from include/linux/pagemap.h:11, from include/linux/mempolicy.h:63, from init/main.c:53: include/linux/highmem.h: At top level: include/linux/highmem.h:196: warning: conflicting types for 'debug_kmap_atomic' include/linux/highmem.h:196: error: static declaration of 'debug_kmap_atomic' follows non-static declaration include/asm/highmem.h:98: error: previous implicit declaration of 'debug_kmap_atomic' was here make[1]: *** [init/main.o] Error 1 make: *** [init] Error 2 Signed-off-by:
Kumar Gala <galak@kernel.crashing.org> Acked-by:
Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: ixp4xx - Fix handling of chained sg buffers crypto: shash - Fix unaligned calculation with short length hwrng: timeriomem - Use phys address rather than virt
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git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommuLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: (41 commits) m68knommu: improve compile arch switch settings m68knommu: fix 5407 ColdFire UART vector setup m68knommu: fix 5307 ColdFire UART vector setup m68knommu: fix 5249 ColdFire UART vector setup m68knommu: fix 5249 ColdFire UART setup m68knommu: fix end of uart table marker m68knommu: switch to using generic_handle_irq() m68k: merge the mmu and non-mmu versions of tlbflush.h m68knommu: introduce basic clk infrastructure m68k: merge the mmu and non-mmu versions of module.h m68knommu: add missing interrupt line definition for UART 2 m68k: merge the mmu and non-mmu versions of mmu_context.h m68k: merge the mmu and non-mmu versions of current.h m68k: merge the mmu and non-mmu versions of div64.h m68k: merge the mmu and non-mmu versions of bugs.h m68k: merge the mmu and non-mmu versions of bug.h m68k: use the mmu version of cache.h for m68knommu as well m68k: use the mmu version of bootinfo.h for m68knommu as well m68k: merge the mmu and non-mmu versions of fb.h m68k: merge the mmu and non-mmu versions of segment.h ...
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git://neil.brown.name/mdLinus Torvalds authored
* 'for-linus' of git://neil.brown.name/md: (53 commits) md/raid5 revise rules for when to update metadata during reshape md/raid5: minor code cleanups in make_request. md: remove CONFIG_MD_RAID_RESHAPE config option. md/raid5: be more careful about write ordering when reshaping. md: don't display meaningless values in sysfs files resync_start and sync_speed md/raid5: allow layout and chunksize to be changed on active array. md/raid5: reshape using largest of old and new chunk size md/raid5: prepare for allowing reshape to change layout md/raid5: prepare for allowing reshape to change chunksize. md/raid5: clearly differentiate 'before' and 'after' stripes during reshape. Documentation/md.txt update md: allow number of drives in raid5 to be reduced md/raid5: change reshape-progress measurement to cope with reshaping backwards. md: add explicit method to signal the end of a reshape. md/raid5: enhance raid5_size to work correctly with negative delta_disks md/raid5: drop qd_idx from r6_state md/raid6: move raid6 data processing to raid6_pq.ko md: raid5 run(): Fix max_degraded for raid level 4. md: 'array_size' sysfs attribute md: centralize ->array_sectors modifications ...
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Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] fix build-breaking 7a192ec3 commit ARM: Add SMSC911X support to Overo platform (V2) arm: update omap_ldp defconfig to use smsc911x arm: update realview defconfigs to use smsc911x arm: update pcm037 defconfig to use smsc911x arm: convert omap ldp platform to use smsc911x arm: convert realview platform to use smsc911x arm: convert pcm037 platform to use smsc911x [ARM] 5444/1: ARM: Realview: Fix event-device multiplicators in localtimer.c [ARM] 5442/1: pxa/cm-x255: fix reverse RDY gpios in PCMCIA driver [ARM] 5441/1: Use pr_err on error paths in at91 pm [ARM] 5440/1: Fix VFP state corruption due to preemption during VFP exceptions [ARM] 5439/1: Do not clear bit 10 of DFSR during abort handling on ARMv6 [ARM] 5437/1: Add documentation for "nohlt" kernel parameter [ARM] 5436/1: ARM: OMAP: Fix compile for rx51 [ARM] arch_reset() now takes a second parameter [ARM] Kirkwood: small L2 code cleanup [ARM] Kirkwood: invalidate L2 cache before enabling it
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git://git.kernel.org/pub/scm/linux/kernel/git/bart/linux-hdreg-h-cleanupLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/linux-hdreg-h-cleanup: remove <linux/ata.h> include from <linux/hdreg.h> include/linux/hdreg.h: remove unused defines isd200: use ATA_* defines instead of *_STAT and *_ERR ones include/linux/hdreg.h: cover WIN_* and friends with #ifndef/#endif __KERNEL__ aoe: WIN_* -> ATA_CMD_* isd200: WIN_* -> ATA_CMD_* include/linux/hdreg.h: cover struct hd_driveid with #ifndef/#endif __KERNEL__ xsysace: make it 'struct hd_driveid'-free ubd_kern: make it 'struct hd_driveid'-free isd200: make it 'struct hd_driveid'-free
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- Apr 03, 2009
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David Howells authored
Add NFS mount options to allow the local caching support to be enabled. The attached patch makes it possible for the NFS filesystem to be told to make use of the network filesystem local caching service (FS-Cache). To be able to use this, a recent nfsutils package is required. There are three variant NFS mount options that can be added to a mount command to control caching for a mount. Only the last one specified takes effect: (*) Adding "fsc" will request caching. (*) Adding "fsc=<string>" will request caching and also specify a uniquifier. (*) Adding "nofsc" will disable caching. For example: mount warthog:/ /a -o fsc The cache of a particular superblock (NFS FSID) will be shared between all mounts of that volume, provided they have the same connection parameters and are not marked 'nosharecache'. Where it is otherwise impossible to distinguish superblocks because all the parameters are identical, but the 'nosharecache' option is supplied, a uniquifying string must be supplied, else only the first mount will be permitted to use the cache. If there's a key collision, then the second mount will disable caching and give a warning into the kernel log. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Display the local caching state in /proc/fs/nfsfs/volumes. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Store pages from an NFS inode into the cache data storage object associated with that inode. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Read pages from an FS-Cache data storage object representing an inode into an NFS inode. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
nfs_readpage_async() needs to be non-static so that it can be used as a fallback for the local on-disk caching should an EIO crop up when reading the cache. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Add read context retention so that FS-Cache can call back into NFS when a read operation on the cache fails EIO rather than reading data. This permits NFS to then fetch the data from the server instead using the appropriate security context. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
FS-Cache page management for NFS. This includes hooking the releasing and invalidation of pages marked with PG_fscache (aka PG_private_2) and waiting for completion of the write-to-cache flag (PG_fscache_write aka PG_owner_priv_2). Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Add some new NFS I/O counters for FS-Cache doing things for NFS. A new line is emitted into /proc/pid/mountstats if caching is enabled that looks like: fsc: <rok> <rfl> <wok> <wfl> <unc> Where <rok> is the number of pages read successfully from the cache, <rfl> is the number of failed page reads against the cache, <wok> is the number of successful page writes to the cache, <wfl> is the number of failed page writes to the cache, and <unc> is the number of NFS pages that have been disconnected from the cache. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Invalidate the FsCache page flags on the pages belonging to an inode when the cache backing that NFS inode is removed. This allows a live cache to be withdrawn. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Bind data storage objects in the local cache to NFS inodes. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Define and create inode-level cache data storage objects (as managed by nfs_inode structs). Each inode-level object is created in a superblock-level index object and is itself a data storage object into which pages from the inode are stored. The inode object key is the NFS file handle for the inode. The inode object is given coherency data to carry in the auxiliary data permitted by the cache. This is a sequence made up of: (1) i_mtime from the NFS inode. (2) i_ctime from the NFS inode. (3) i_size from the NFS inode. (4) change_attr from the NFSv4 attribute data. As the cache is a persistent cache, the auxiliary data is checked when a new NFS in-memory inode is set up that matches an already existing data storage object in the cache. If the coherency data is the same, the on-disk object is retained and used; if not, it is scrapped and a new one created. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Define and create superblock-level cache index objects (as managed by nfs_server structs). Each superblock object is created in a server level index object and is itself an index into which inode-level objects are inserted. Ideally there would be one superblock-level object per server, and the former would be folded into the latter; however, since the "nosharecache" option exists this isn't possible. The superblock object key is a sequence consisting of: (1) Certain superblock s_flags. (2) Various connection parameters that serve to distinguish superblocks for sget(). (3) The volume FSID. (4) The security flavour. (5) The uniquifier length. (6) The uniquifier text. This is normally an empty string, unless the fsc=xyz mount option was used to explicitly specify a uniquifier. The key blob is of variable length, depending on the length of (6). The superblock object is given no coherency data to carry in the auxiliary data permitted by the cache. It is assumed that the superblock is always coherent. This patch also adds uniquification handling such that two otherwise identical superblocks, at least one of which is marked "nosharecache", won't end up trying to share the on-disk cache. It will be possible to manually provide a uniquifier through a mount option with a later patch to avoid the error otherwise produced. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Define and create server-level cache index objects (as managed by nfs_client structs). Each server object is created in the NFS top-level index object and is itself an index into which superblock-level objects are inserted. Ideally there would be one superblock-level object per server, and the former would be folded into the latter; however, since the "nosharecache" option exists this isn't possible. The server object key is a sequence consisting of: (1) NFS version (2) Server address family (eg: AF_INET or AF_INET6) (3) Server port. (4) Server IP address. The key blob is of variable length, depending on the length of (4). The server object is given no coherency data to carry in the auxiliary data permitted by the cache. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Register NFS for caching and retrieve the top-level cache index object cookie. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Permit local filesystem caching to be enabled for NFS in the kernel configuration. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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David Howells authored
Add FS-Cache option bit to nfs_server struct. This is set to indicate local on-disk caching is enabled for a particular superblock. Also add debug bit for local caching operations. Signed-off-by:
David Howells <dhowells@redhat.com> Acked-by:
Steve Dickson <steved@redhat.com> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Tested-by:
Daire Byrne <Daire.Byrne@framestore.com>
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