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As flexfiles has FF_FLAGS_NO_READ_IO, there is a need to generically
support enforcing that a IOMODE_RW segment will not allow READ I/O.
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
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reading is disabled
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
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In commit f9476a6c6d0c ("drm/i915: Refactor platform specifics out of
intel_get_shared_dpll()"), the ibx_get_dpll() function lacked an error
check, that can lead to a NULL pointer dereference when trying to enable
three pipes.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000068
IP: [<ffffffffa0482275>] intel_reference_shared_dpll+0x15/0x100 [i915]
PGD cec87067 PUD d30ce067 PMD 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: snd_hda_intel i915 drm_kms_helper drm intel_gtt sch_fq_codel cfg80211 binfmt_misc i2c_algo_bit cfbfillrect syscopyarea cfbimgblt sysfillrect sysimgblt fb_sys_fops cfbcopyarea intel_rapl iosf_mbi x86_pkg_temp_thermal coretemp agpgart kvm_intel snd_hda_codec_hdmi kvm iTCO_wdt snd_hda_codec_realtek snd_hda_codec_generic irqbypass aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd psmouse pcspkr snd_hda_codec i2c_i801 snd_hwdep snd_hda_core snd_pcm snd_timer lpc_ich mfd_core snd soundcore wmi evdev tpm_tis tpm [last unloaded: drm]
CPU: 3 PID: 5810 Comm: kms_flip Tainted: G U W 4.6.0-test+ #3
Hardware name: /DZ77BH-55K, BIOS BHZ7710H.86A.0100.2013.0517.0942 05/17/2013
task: ffff8800d3908040 ti: ffff8801166c8000 task.ti: ffff8801166c8000
RIP: 0010:[<ffffffffa0482275>] [<ffffffffa0482275>] intel_reference_shared_dpll+0x15/0x100 [i915]
RSP: 0018:ffff8801166cba60 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000001 RSI: ffff8800d07f1bf8 RDI: 0000000000000000
RBP: ffff8801166cba88 R08: 0000000000000002 R09: ffff8800d32e5698
R10: 0000000000000001 R11: ffff8800cc89ac88 R12: ffff8800d07f1bf8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f4c3fc8d8c0(0000) GS:ffff88011bcc0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 00000000d3b4c000 CR4: 00000000001406e0
Stack:
0000000000000000 ffff8800d07f1bf8 0000000000000000 ffff8800d04c0000
0000000000000000 ffff8801166cbaa8 ffffffffa04823a7 ffff8800d07f1bf8
ffff8800d32e5698 ffff8801166cbab8 ffffffffa04840cf ffff8801166cbaf0
Call Trace:
[<ffffffffa04823a7>] ibx_get_dpll+0x47/0xa0 [i915]
[<ffffffffa04840cf>] intel_get_shared_dpll+0x1f/0x50 [i915]
[<ffffffffa046d080>] ironlake_crtc_compute_clock+0x280/0x430 [i915]
[<ffffffffa0472ac0>] intel_crtc_atomic_check+0x240/0x320 [i915]
[<ffffffffa03da18e>] drm_atomic_helper_check_planes+0x14e/0x1d0 [drm_kms_helper]
[<ffffffffa0474a0c>] intel_atomic_check+0x5dc/0x1110 [i915]
[<ffffffffa029d3aa>] drm_atomic_check_only+0x14a/0x660 [drm]
[<ffffffffa029d086>] ? drm_atomic_set_crtc_for_connector+0x96/0x100 [drm]
[<ffffffffa029d8d7>] drm_atomic_commit+0x17/0x60 [drm]
[<ffffffffa03dc3b7>] restore_fbdev_mode+0x237/0x260 [drm_kms_helper]
[<ffffffffa029c65a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm]
[<ffffffffa03de9b3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[<ffffffffa03dea2d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[<ffffffffa03de93a>] drm_fb_helper_hotplug_event+0xaa/0xf0 [drm_kms_helper]
[<ffffffffa03de9d6>] drm_fb_helper_restore_fbdev_mode_unlocked+0x56/0x80 [drm_kms_helper]
[<ffffffffa0490f72>] intel_fbdev_restore_mode+0x22/0x80 [i915]
[<ffffffffa04ba45e>] i915_driver_lastclose+0xe/0x20 [i915]
[<ffffffffa02810de>] drm_lastclose+0x2e/0x130 [drm]
[<ffffffffa028148c>] drm_release+0x2ac/0x4b0 [drm]
[<ffffffff811a6b2d>] __fput+0xed/0x1f0
[<ffffffff811a6c6e>] ____fput+0xe/0x10
[<ffffffff81079156>] task_work_run+0x76/0xb0
[<ffffffff8105aaab>] do_exit+0x3ab/0xc60
[<ffffffff810a145f>] ? trace_hardirqs_on_caller+0x12f/0x1c0
[<ffffffff8105c67e>] do_group_exit+0x4e/0xc0
[<ffffffff8105c704>] SyS_exit_group+0x14/0x20
[<ffffffff8158bb25>] entry_SYSCALL_64_fastpath+0x18/0xa8
Code: 14 80 48 8d 34 90 b8 01 00 00 00 d3 e0 09 04 b3 5b 41 5c 5d c3 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 49 89 fe 41 55 41 54 53 <44> 8b 67 68 48 89 f3 48 8b be 08 02 00 00 4c 8b 2e e8 15 9d fd
RIP [<ffffffffa0482275>] intel_reference_shared_dpll+0x15/0x100 [i915]
RSP <ffff8801166cba60>
CR2: 0000000000000068
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: drm-intel-fixes@lists.freedesktop.org
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Fixes: f9476a6c6d0c ("drm/i915: Refactor platform specifics out of intel_get_shared_dpll()")
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463748426-5956-1-git-send-email-ander.conselvan.de.oliveira@intel.com
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It appears the website for maxim-ic.com changed to
maximintegrated.com.
Signed-off-by: Glenn Dayton <glenn.dayton24@gmail.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
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"apd" was intended here instead of "init".
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
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Thanks to Ville Syrjälä for pointing me towards the cause of this issue.
Unfortunately one of the sideaffects of having the refclk for a DPLL set
to SSC is that as long as it's set to SSC, the GPU will prevent us from
powering down any of the pipes or transcoders using it. A couple of
BIOSes enable SSC in both PCH_DREF_CONTROL and in the DPLL
configurations. This causes issues on the first modeset, since we don't
expect SSC to be left on and as a result, can't successfully power down
the pipes or the transcoders using it. Here's an example from this Dell
OptiPlex 990:
[drm:intel_modeset_init] SSC enabled by BIOS, overriding VBT which says disabled
[drm:intel_modeset_init] 2 display pipes available.
[drm:intel_update_cdclk] Current CD clock rate: 400000 kHz
[drm:intel_update_max_cdclk] Max CD clock rate: 400000 kHz
[drm:intel_update_max_cdclk] Max dotclock rate: 360000 kHz
vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[drm:intel_crt_reset] crt adpa set to 0xf40000
[drm:intel_dp_init_connector] Adding DP connector on port C
[drm:intel_dp_aux_init] registering DPDDC-C bus for card0-DP-1
[drm:ironlake_init_pch_refclk] has_panel 0 has_lvds 0 has_ck505 0
[drm:ironlake_init_pch_refclk] Disabling SSC entirely
… later we try committing the first modeset …
[drm:intel_dump_pipe_config] [CRTC:26][modeset] config ffff88041b02e800 for pipe A
[drm:intel_dump_pipe_config] cpu_transcoder: A
…
[drm:intel_dump_pipe_config] dpll_hw_state: dpll: 0xc4016001, dpll_md: 0x0, fp0: 0x20e08, fp1: 0x30d07
[drm:intel_dump_pipe_config] planes on this crtc
[drm:intel_dump_pipe_config] STANDARD PLANE:23 plane: 0.0 idx: 0 enabled
[drm:intel_dump_pipe_config] FB:42, fb = 800x600 format = 0x34325258
[drm:intel_dump_pipe_config] scaler:0 src (0, 0) 800x600 dst (0, 0) 800x600
[drm:intel_dump_pipe_config] CURSOR PLANE:25 plane: 0.1 idx: 1 disabled, scaler_id = 0
[drm:intel_dump_pipe_config] STANDARD PLANE:27 plane: 0.1 idx: 2 disabled, scaler_id = 0
[drm:intel_get_shared_dpll] CRTC:26 allocated PCH DPLL A
[drm:intel_get_shared_dpll] using PCH DPLL A for pipe A
[drm:ilk_audio_codec_disable] Disable audio codec on port C, pipe A
[drm:intel_disable_pipe] disabling pipe A
------------[ cut here ]------------
WARNING: CPU: 1 PID: 130 at drivers/gpu/drm/i915/intel_display.c:1146 intel_disable_pipe+0x297/0x2d0 [i915]
pipe_off wait timed out
…
---[ end trace 94fc8aa03ae139e8 ]---
[drm:intel_dp_link_down]
[drm:ironlake_crtc_disable [i915]] *ERROR* failed to disable transcoder A
Later modesets succeed since they reset the DPLL's configuration anyway,
but this is enough to get stuck with a big fat warning in dmesg.
A better solution would be to add refcounts for the SSC source, but for
now leaving the source clock on should suffice.
Changes since v3:
- Move temp variable into loop
- Move checks for using_ssc_source to after we've figured out has_ck505
- Add using_ssc_source to debug output
Changes since v2:
- Fix debug output for when we disable the CPU source
Changes since v1:
- Leave the SSC source clock on instead of just shutting it off on all
of the DPLL configurations.
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lyude <cpaul@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1464199863-9397-1-git-send-email-cpaul@redhat.com
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The ones that are taking it exclusive, that is...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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This reverts commit 5ddc7bd43ccc ("mtd: atmel_nand: Support variable
RB_EDGE interrupts")
Because for current SoCs, the RB_EDGE3(i.e. bit 27) of HSMC_SR
register does not exist, the RB_EDGE0 (i.e. bit 24) is the ready/busy
line edge status bit. It is a datasheet bug.
Cc: <stable@vger.kernel.org>
Fixes: commit 5ddc7bd43ccc ("mtd: atmel_nand: Support variable RB_EDGE interrupts")
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes: EFI, entry code, pkeys and MPX fixes, TASK_SIZE cleanups
and a tsc frequency table fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Switch from TASK_SIZE to TASK_SIZE_MAX in the page fault code
x86/fsgsbase/64: Use TASK_SIZE_MAX for FSBASE/GSBASE upper limits
x86/mm/mpx: Work around MPX erratum SKD046
x86/entry/64: Fix stack return address retrieval in thunk
x86/efi: Fix 7-parameter efi_call()s
x86/cpufeature, x86/mm/pkeys: Fix broken compile-time disabling of pkeys
x86/tsc: Add missing Cherrytrail frequency to the table
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Two fixes: one for a lost wakeup, the other to fix the compiler
optimizing out preempt operations on ARM64 (and possibly other non-x86
architectures)"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/core: Fix remote wakeups
sched/preempt: Fix preempt_count manipulations
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
"Mostly tooling and PMU driver fixes, but also a number of late updates
such as the reworking of the call-chain size limiting logic to make
call-graph recording more robust, plus tooling side changes for the
new 'backwards ring-buffer' extension to the perf ring-buffer"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
perf record: Read from backward ring buffer
perf record: Rename variable to make code clear
perf record: Prevent reading invalid data in record__mmap_read
perf evlist: Add API to pause/resume
perf trace: Use the ptr->name beautifier as default for "filename" args
perf trace: Use the fd->name beautifier as default for "fd" args
perf report: Add srcline_from/to branch sort keys
perf evsel: Record fd into perf_mmap
perf evsel: Add overwrite attribute and check write_backward
perf tools: Set buildid dir under symfs when --symfs is provided
perf trace: Only auto set call-graph to "dwarf" when syscalls are being traced
perf annotate: Sort list of recognised instructions
perf annotate: Fix identification of ARM blt and bls instructions
perf tools: Fix usage of max_stack sysctl
perf callchain: Stop validating callchains by the max_stack sysctl
perf trace: Fix exit_group() formatting
perf top: Use machine->kptr_restrict_warned
perf trace: Warn when trying to resolve kernel addresses with kptr_restrict=1
perf machine: Do not bail out if not managing to read ref reloc symbol
perf/x86/intel/p4: Trival indentation fix, remove space
...
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Commit 8a56038c2aef ("Yama: consolidate error reporting") causes lockups
when someone hits a Yama denial. Call chain:
process_vm_readv -> process_vm_rw -> process_vm_rw_core -> mm_access
-> ptrace_may_access
task_lock(...) is taken
__ptrace_may_access -> security_ptrace_access_check
-> yama_ptrace_access_check -> report_access -> kstrdup_quotable_cmdline
-> get_cmdline -> access_process_vm -> get_task_mm
task_lock(...) is taken again
task_lock(p) just calls spin_lock(&p->alloc_lock), so at this point,
spin_lock() is called on a lock that is already held by the current
process.
Also: Since the alloc_lock is a spinlock, sleeping inside
security_ptrace_access_check hooks is probably not allowed at all? So it's
not even possible to print the cmdline from in there because that might
involve paging in userspace memory.
It would be tempting to rewrite ptrace_may_access() to drop the alloc_lock
before calling the LSM, but even then, ptrace_may_access() itself might be
called from various contexts in which you're not allowed to sleep; for
example, as far as I understand, to be able to hold a reference to another
task, usually an RCU read lock will be taken (see e.g. kcmp() and
get_robust_list()), so that also prohibits sleeping. (And using e.g. FUSE,
a user can cause pagefault handling to take arbitrary amounts of time -
see https://bugs.chromium.org/p/project-zero/issues/detail?id=808.)
Therefore, AFAIK, in order to print the name of a process below
security_ptrace_access_check(), you'd have to either grab a reference to
the mm_struct and defer the access violation reporting or just use the
"comm" value that's stored in kernelspace and accessible without big
complications. (Or you could try to use some kind of atomic remote VM
access that fails if the memory isn't paged in, similar to
copy_from_user_inatomic(), and if necessary fall back to comm, but
that'd be kind of ugly because the comm/cmdline choice would look
pretty random to the user.)
Fix it by deferring reporting of the access violation until current
exits kernelspace the next time.
v2: Don't oops on PTRACE_TRACEME, call report_access under
task_lock(current). Also fix nonsensical comment. And don't use
GPF_ATOMIC for memory allocation with no locks held.
This patch is tested both for ptrace attach and ptrace traceme.
Fixes: 8a56038c2aef ("Yama: consolidate error reporting")
Signed-off-by: Jann Horn <jann@thejh.net>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool build fix from Ingo Molnar:
"An libtool fix for older libelf versions"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Allow building with older libelf
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We should reset i_requested_max_size before waking the waiters.
(zero i_requested_max_size make waiter re-request the max size)
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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truncate_pagecache() drops dirty pages, it's dangerous to use it
to invalidate read cache. Besides, we shouldn't start invalidating
read cache while there are buffer writers. Because buffer writers
may add dirty pages later.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Signed-off-by: Yan, Zheng <zyan@redhat.com>
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writepage() can be interrupted when it's called by direct memory
reclaimer (the direct memory relaimer is killed). To avoid lossing
data, we redirty the page.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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ceph_update_writeable_page() is used by ceph_write_begin(). It beaks
atomicity of write operation if it's interruptible.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Ceph_osdc_wait_request() is used when cephfs issues sync IO. In most
cases, the sync IO should be uninterruptible. The fix is use killale
wait function in ceph_osdc_wait_request().
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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when ceph_update_writeable_page() return -EAGAIN, caller should
lock the page and call ceph_update_writeable_page() again.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Fault and page_mkwrite are supposed to be uninterruptable. But they
call ceph functions that are interruptible. So they should block
signals before calling functions that are interruptible
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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This patch makes serverl logical caculation functions return bool to
improve readability due to these particular functions only using 0/1
as their return value.
No functional change.
Signed-off-by: Zhang Zhuoyu <zhangzhuoyu@cmss.chinamobile.com>
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A mds bug can cause symlink's size to be truncated to zero.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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check if number of splits in i_fragtree is equal to number of splits
in mds reply
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Nodes in i_fragtree are sorted according to ceph_compare_frag().
It means frag node in i_fragtree always follow its direct parent
node. To check if a leaf node is valid, we just need to check if
it's child of previous split node.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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-1 is CDIR_AUTH_PARENT, it means dir's auth mds is the same as
inode's auth mds
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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The algorithm that updates i_fragtree relies on that the frag tree
splits in mds reply are of the same order of i_fragtree. This is not
true because current MDS encodes frag tree splits in ascending order
of (unsigned)frag_t. But nodes in i_fragtree are sorted according to
ceph_frag_compare().
The fix is sort the frag tree splits first, then updates i_fragtree.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Signed-off-by: Yan, Zheng <zyan@redhat.com>
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If MDS sorts dentries in dirfrag in hash order, we use hash value to
compose dentry offset. dentry offset is:
(0xff << 52) | ((24 bits hash) << 28) |
(the nth entry hash hash collision)
This offset is stable across directory fragmentation. This alos means
there is no need to reset readdir offset if directory get fragmented
in the middle of readdir.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Forward seek within same frag does not update fi->last_name, it will
not affect contents of later readdir reply. So there is no need to
forbid marking directory complete
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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This is preparation for using hash value as dentry 'offset'
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Set a flag in readdir request, which indicates that client interprets
'end/complete' as bit flags. So that mds can reply additional flags in
readdir reply.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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This avoids defining multiple arrays for entries in readdir reply
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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don't distinguish leftmost frag from other frags. always use 2 as
first entry's offset.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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we never add snapdir and the hidden .ceph dir into readdir cache
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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use binary search to find cache index that corresponds to readdir
postion.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Setxattr with NULL value and XATTR_REPLACE flag should be equivalent
to removexattr. But current MDS does not support deleting vxattrs through
MDS_OP_SETXATTR request. The workaround is sending MDS_OP_RMXATTR request
if setxattr actually removs xattr.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Signed-off-by: Yan, Zheng <zyan@redhat.com>
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symlink target is useless for debug and can be very long. It's annoying
to show it in debugfs/mdsc.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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truncate_pagecache() may decrease inode's reference. This can cause
deadlock if inode's last reference is dropped and iput_final() wants
to evict the inode. (evict() calls inode_wait_for_writeback(), which
waits for ceph_writepages_start() to return).
The fix is use work thead to truncate dirty pages. Also add 'forced
umount' check to ceph_update_writeable_page(), which prevents new
pages getting dirty.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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When mds session gets killed, read/write operation may hang.
Client waits for Frw caps, but mds does not know what caps client
wants. To recover this, client sends an open request to mds. The
request will tell mds what caps client wants.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
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Signed-off-by: Yan, Zheng <zyan@redhat.com>
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To access non-default filesystem, we just need to subscribe to
mdsmap.<MDS_NAMESPACE_ID> and add a new mount option for mds
namespace id.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
[idryomov@gmail.com: switch to a new libceph API]
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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... with a wrapper around maybe_request_map() - no need for two
osdmap-specific functions.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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There is now about a dozen CEPH_OSDMAP_* flags. This is a debugging
interface, so just dump in hex instead of spelling each flag out.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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This adds the "map check" infrastructure for sending osdmap version
checks on CALC_TARGET_POOL_DNE and completing in-flight requests with
-ENOENT if the target pool doesn't exist or has just been deleted.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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