summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2016-07-29drm/amd/powerplay: Mark functions of ppevvmath.h staticNils Wallménius
This introduces some warnings due to unused functions, that are deleted in the following commit. Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/radeon: Remove deprecated create_singlethread_workqueueBhaktipriya Shridhar
alloc_workqueue replaces deprecated create_singlethread_workqueue(). Each hardware CRTC has a single flip work queue. When a radeon_flip_work_func item is queued, it needs to be executed ASAP because even a slight delay may cause the flip to be delayed by one refresh cycle. Hence, a dedicated workqueue with WQ_HIGHPRI set, has been used here since a delay can cause the outcome to miss the refresh cycle. Since there are only a fixed number of work items, explicit concurrency limit is unnecessary here. Reviewed-by: Christian König <christian.koenig@amd.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amd/powerplay: Delete an unnecessary variable initialisation in ↵SF Markus Elfring
phm_dispatch_table() The variable "result" will be set to an appropriate value a bit later. Thus omit the explicit initialisation at the beginning. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amd/powerplay: Change assignment for a buffer variable in ↵Markus Elfring
phm_dispatch_table() v2 The variable "temp_storage" was eventually reassigned with a pointer. Thus omit the explicit initialisation at the beginning. v2: agd: fix coding style Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amdgpu: Change assignment for a variable in amdgpu_cgs_acpi_eval_object()Markus Elfring
Indicate successful function execution only at the end. Thus omit initialisation for the variable "result" at the beginning. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amdgpu: Delete an unnecessary variable initialisation in ↵Markus Elfring
amdgpu_cgs_acpi_eval_object() The variable "argument" will be set to an appropriate value a bit later. Thus omit the explicit initialisation at the beginning. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amdgpu: Delete a variable in amdgpu_cgs_acpi_eval_object()Markus Elfring
The local variable "func_no" was assigned a value at two places. But it was not read within this function. Thus delete it. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amdgpu: One function call less in amdgpu_cgs_acpi_eval_object() after ↵Markus Elfring
error detection The kfree() function was called in one case by the amdgpu_cgs_acpi_eval_object() function during error handling even if the passed variable "obj" contained a null pointer. * Adjust jump targets according to the Linux coding style convention. * Delete unnecessary initialisations for the variables "obj" and "params" then. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amdgpu: Delete an unnecessary check before ↵Markus Elfring
drm_gem_object_unreference_unlocked() The drm_gem_object_unreference_unlocked() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29GPU-DRM-Radeon: Delete an unnecessary check before ↵Markus Elfring
drm_gem_object_unreference_unlocked() The drm_gem_object_unreference_unlocked() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drivers/amdgpu: Remove redundant itermediate return valEdward O'Callaghan
Found-by: Coccinelle Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drivers/amdgpu: Use canonical boolean form in various predicatesEdward O'Callaghan
V.2: Fixup by hand to remove a few instances of redundant '()' left over. Found-by: Coccinelle Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drivers/amdgpu: Remove redundant casts on kzalloc() callsEdward O'Callaghan
Found-by: Coccinelle Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drivers/amdgpu: Remove redundant NULL check before kfree()Edward O'Callaghan
Found-by: Coccinelle Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drivers/amdgpu: Use canonical form in branch predicatesEdward O'Callaghan
Found-by: Coccinelle Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drivers/amdgpu: Use 'true/false' for bool typed variablesEdward O'Callaghan
Found-by: Coccinelle Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drivers/amdgpu: Remove spurious semicolonsEdward O'Callaghan
Found-by: Coccinelle Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net> Reviewed-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amd/powerplay: enable DiDt feature for polaris10/11.Rex Zhu
DIDT is a power saving feature which helps limit power consumption in order to hit a target power allocation. v1: delete temp file added accidentally. Signed-off-by: Rex Zhu <Rex.Zhu@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amd/powerplay: populate SMC ACPI minimum voltage using VBIOS boot SCLK ↵Rex Zhu
and MCLK Signed-off-by: Rex Zhu <Rex.Zhu@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amdgpu/powerplay: partial revert of endian fixesAlex Deucher
This fixes a warning on big endian. Bitfields need to be handled properly. Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/radeon: drop confusing message about backlight controlAlex Deucher
The message is harmless and confusing. On PX systems, there is one ATIF method, but potentially multiple GPUs leading to an error on the GPU with no backlight control. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=115011 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: Hans de Goede <jwrdegoede@fedoraproject.org>
2016-07-29drm/radeon/ci add comment to document intentionally unreachable codeNicholas Mc Guire
commit d967be9b80a5 ("drm/radeon/ci: disable needless sclk changes") introduces an unreachable if(C != C) conditional code section flagged by coccinelle script bad_conditional.cocci: Add a comment to make it clear that this is intentional. Fixes: d967be9b80a5 ("drm/radeon/ci: disable needless sclk changes") Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/amdgpu: Disable RPM helpers while reprobing connectors on resumeLyude
Just about all of amdgpu's connector probing functions try to acquire runtime PM refs. If we try to do this in the context of amdgpu_resume_kms by calling drm_helper_hpd_irq_event(), we end up deadlocking the system. Since we're guaranteed to be holding the spinlock for RPM in amdgpu_resume_kms, and we already know the GPU is in working order, we need to prevent the RPM helpers from trying to run during the initial connector reprobe on resume. There's a couple of solutions I've explored for fixing this, but this one by far seems to be the simplest and most reliable (plus I'm pretty sure that's what disable_depth is there for anyway). Reproduction recipe: - Get any laptop dual GPUs using PRIME - Make sure runtime PM is enabled for amdgpu - Boot the machine - If the machine managed to boot without hanging, switch out of X to another VT. This should definitely cause X to hang infinitely. Changes since v1: - add appropriate #ifdef checks for CONFIG_PM. This is not very useful, but it appears some kernel test suites test compiling amdgpu with CONFIG_PM disabled, which results in this patch breaking the builds if we don't include this #ifdef Cc: stable@vger.kernel.org Cc: Alex Deucher <alexdeucher@gmail.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Lyude <cpaul@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-07-29drm/radeon: init atpx at switcheroo register time v2Alex Deucher
If we do it at enable time, it's too late for the feature checks. v2: drop .init setting as per Peter's comments bug: https://bugzilla.kernel.org/show_bug.cgi?id=115321 Reviewed-by: Peter Wu <peter@lekensteyn.nl> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: Peter Wu <peter@lekensteyn.nl>
2016-07-29drm/amdgpu: init atpx at switcheroo register time (v2)Alex Deucher
If we do it at enable time, it's too late for the feature checks. v2: drop .init setting as per Peter's comments Reviewed-by: Peter Wu <peter@lekensteyn.nl> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: Peter Wu <peter@lekensteyn.nl>
2016-07-29Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull CIFS/SMB3 fixes from Steve French: "Various CIFS/SMB3 fixes, most for stable" * 'for-next' of git://git.samba.org/sfrench/cifs-2.6: CIFS: Fix a possible invalid memory access in smb2_query_symlink() fs/cifs: make share unaccessible at root level mountable cifs: fix crash due to race in hmac(md5) handling cifs: unbreak TCP session reuse cifs: Check for existing directory when opening file with O_CREAT Add MF-Symlinks support for SMB 2.0
2016-07-29sparc64: Trim page tables for 8M hugepagesNitin Gupta
For PMD aligned (8M) hugepages, we currently allocate all four page table levels which is wasteful. We now allocate till PMD level only which saves memory usage from page tables. Also, when freeing page table for 8M hugepage backed region, make sure we don't try to access non-existent PTE level. Orabug: 22630259 Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-29objtool: Un-capitalize "Warning" for out-of-sync instruction decoderJosh Poimboeuf
Change "Warning" to "warning" to make it look more like a GCC warning. Hopefully that will be enough to help the 0-day bot or other automated tools catch this warning earlier before it ends up in Linus's tree. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/b1669f391a5db91040427fd9f8e1e79db18f9709.1469751119.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-29objtool: Resync x86 instruction decoder with the kernel'sJosh Poimboeuf
This fixes the following warning: Warning: objtool: x86 instruction decoder differs from kernel Unfortunately we have three identical copies of the x86 instruction decoder in the kernel tree that have to be manually kept in sync. It's on my TODO list to at least library-ize the ones in the tools subdir so we'd only have two of them instead of three. In the meantime, here's another manual sync. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: c61f4d5ebaf0 ("perf tools: Add AVX-512 support to the instruction decoder used by Intel PT") Link: http://lkml.kernel.org/r/d7f74b4d91fed25b0be33cd5c86f5131fa1a7529.1469751119.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-29objtool: Support new GCC 6 switch jump table patternJosh Poimboeuf
This fixes some false positive objtool warnings seen with gcc 6.1.1: kernel/trace/ring_buffer.o: warning: objtool: ring_buffer_read_page()+0x36c: sibling call from callable instruction with changed frame pointer arch/x86/kernel/reboot.o: warning: objtool: native_machine_emergency_restart()+0x139: sibling call from callable instruction with changed frame pointer lib/xz/xz_dec_stream.o: warning: objtool: xz_dec_run()+0xc2: sibling call from callable instruction with changed frame pointer With GCC 6, a new code pattern is sometimes used to access a switch statement jump table in .rodata, which objtool doesn't yet recognize: mov [rodata addr],%reg1 ... some instructions ... jmpq *(%reg1,%reg2,8) Add support for detecting that pattern. The detection code is rather crude, but it's still effective at weeding out false positives and catching real warnings. It can be refined later once objtool starts reading DWARF CFI. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/b8c9503b4ad8c8a827cc5400db4c1b40a3ea07bc.1469751119.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-29Merge tag 'perf-urgent-for-mingo-20160728' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fix from Arnaldo Carvalho de Melo: - Fix the tools/vm/ build by making libapi provide the str_error_c function, that libapi uses but wasn't part of the list of objects linked with tools/vm/ programs. (Arnaldo Carvalho de Melo) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-29fuse: use filemap_check_errors()Miklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29mm: export filemap_check_errors() to modulesMiklos Szeredi
Can be used by fuse, btrfs and f2fs to replace opencoded variants. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29fuse: fix wrong assignment of ->flags in fuse_send_init()Wei Fang
FUSE_HAS_IOCTL_DIR should be assigned to ->flags, it may be a typo. Signed-off-by: Wei Fang <fangwei1@huawei.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 69fe05c90ed5 ("fuse: add missing INIT flags") Cc: <stable@vger.kernel.org>
2016-07-29fuse: fuse_flush must check mapping->flags for errorsMaxim Patlasov
fuse_flush() calls write_inode_now() that triggers writeback, but actual writeback will happen later, on fuse_sync_writes(). If an error happens, fuse_writepage_end() will set error bit in mapping->flags. So, we have to check mapping->flags after fuse_sync_writes(). Signed-off-by: Maxim Patlasov <mpatlasov@virtuozzo.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 4d99ff8f12eb ("fuse: Turn writeback cache on") Cc: <stable@vger.kernel.org> # v3.15+
2016-07-29fuse: fsync() did not return IO errorsAlexey Kuznetsov
Due to implementation of fuse writeback filemap_write_and_wait_range() does not catch errors. We have to do this directly after fuse_sync_writes() Signed-off-by: Alexey Kuznetsov <kuznet@virtuozzo.com> Signed-off-by: Maxim Patlasov <mpatlasov@virtuozzo.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 4d99ff8f12eb ("fuse: Turn writeback cache on") Cc: <stable@vger.kernel.org> # v3.15+
2016-07-29x86/power/64: Fix hibernation return address corruptionJosh Poimboeuf
In kernel bug 150021, a kernel panic was reported when restoring a hibernate image. Only a picture of the oops was reported, so I can't paste the whole thing here. But here are the most interesting parts: kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle kernel paging request at ffff8804615cfd78 ... RIP: ffff8804615cfd78 RSP: ffff8804615f0000 RBP: ffff8804615cfdc0 ... Call Trace: do_signal+0x23 exit_to_usermode_loop+0x64 ... The RIP is on the same page as RBP, so it apparently started executing on the stack. The bug was bisected to commit ef0f3ed5a4ac (x86/asm/power: Create stack frames in hibernate_asm_64.S), which in retrospect seems quite dangerous, since that code saves and restores the stack pointer from a global variable ('saved_context'). There are a lot of moving parts in the hibernate save and restore paths, so I don't know exactly what caused the panic. Presumably, a FRAME_END was executed without the corresponding FRAME_BEGIN, or vice versa. That would corrupt the return address on the stack and would be consistent with the details of the above panic. [ rjw: One major problem is that by the time the FRAME_BEGIN in restore_registers() is executed, the stack pointer value may not be valid any more. Namely, the stack area pointed to by it previously may have been overwritten by some image memory contents and that page frame may now be used for whatever different purpose it had been allocated for before hibernation. In that case, the FRAME_BEGIN will corrupt that memory. ] Instead of doing the frame pointer save/restore around the bounds of the affected functions, just do it around the call to swsusp_save(). That has the same effect of ensuring that if swsusp_save() sleeps, the frame pointers will be correct. It's also a much more obviously safe way to do it than the original patch. And objtool still doesn't report any warnings. Fixes: ef0f3ed5a4ac (x86/asm/power: Create stack frames in hibernate_asm_64.S) Link: https://bugzilla.kernel.org/show_bug.cgi?id=150021 Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Reported-by: Andre Reinke <andre.reinke@mailbox.org> Tested-by: Andre Reinke <andre.reinke@mailbox.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-07-29crypto: marvell - Don't copy IV vectors from the _process op for ciphersRomain Perier
The IV output vectors should only be copied from the _complete operation and not from the _process operation, i.e only from the operation that is designed to copy the result of the request to the right location. This copy is already done in the _complete operation, so this commit removes the duplicated code in the _process op. Fixes: 3610d6cd5231 ("crypto: marvell - Add a complete...") Signed-off-by: Romain Perier <romain.perier@free-electrons.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-07-29lib/mpi: Fix SG miter leakHerbert Xu
In mpi_read_raw_from_sgl we may leak the SG miter resouces after reading the leading zeroes. This patch fixes this by stopping the iteration once the leading zeroes have been read. Fixes: 127827b9c295 ("lib/mpi: Do not do sg_virt") Reported-by: Nicolai Stange <nicstange@gmail.com> Tested-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-07-29ovl: simplify empty checkingMiklos Szeredi
The empty checking logic is duplicated in ovl_check_empty_and_clear() and ovl_remove_and_whiteout(), except the condition for clearing whiteouts is different: ovl_check_empty_and_clear() checked for being upper ovl_remove_and_whiteout() checked for merge OR lower Move the intersection of those checks (upper AND merge) into ovl_check_empty_and_clear() and simplify ovl_remove_and_whiteout(). Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29qstr: constify instances in overlayfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: clear nlink on rmdirMiklos Szeredi
To make delete notification work on fa/inotify. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: disallow overlayfs as upperdirMiklos Szeredi
This does not work and does not make sense. So instead of fixing it (probably not hard) just disallow. Reported-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: <stable@vger.kernel.org>
2016-07-29ovl: fix warningMiklos Szeredi
There's a superfluous newline in the warning message in ovl_d_real(). Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: remove duplicated include from super.cWei Yongjun
Remove duplicated include. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: append MAY_READ when diluting write checksVivek Goyal
Right now we remove MAY_WRITE/MAY_APPEND bits from mask if realfile is on lower/. This is done as files on lower will never be written and will be copied up. But to copy up a file, mounter should have MAY_READ permission otherwise copy up will fail. So set MAY_READ in mask when MAY_WRITE is reset. Dan Walsh noticed this when he did access(lowerfile, W_OK) and it returned True (context mounts) but when he tried to actually write to file, it failed as mounter did not have permission on lower file. [SzM] don't set MAY_READ if only MAY_APPEND is set without MAY_WRITE; this won't trigger a copy-up. Reported-by: Dan Walsh <dwalsh@redhat.com> Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: dilute permission checks on lower only if not special fileVivek Goyal
Right now if file is on lower/, we remove MAY_WRITE/MAY_APPEND bits from mask as lower/ will never be written and file will be copied up. But this is not true for special files. These files are not copied up and are opened in place. So don't dilute the checks for these types of files. Reported-by: Dan Walsh <dwalsh@redhat.com> Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: fix POSIX ACL settingMiklos Szeredi
Setting POSIX ACL needs special handling: 1) Some permission checks are done by ->setxattr() which now uses mounter's creds ("ovl: do operations on underlying file system in mounter's context"). These permission checks need to be done with current cred as well. 2) Setting ACL can fail for various reasons. We do not need to copy up in these cases. In the mean time switch to using generic_setxattr. [Arnd Bergmann] Fix link error without POSIX ACL. posix_acl_from_xattr() doesn't have a 'static inline' implementation when CONFIG_FS_POSIX_ACL is disabled, and I could not come up with an obvious way to do it. This instead avoids the link error by defining two sets of ACL operations and letting the compiler drop one of the two at compile time depending on CONFIG_FS_POSIX_ACL. This avoids all references to the ACL code, also leading to smaller code. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: share inode for hard linkMiklos Szeredi
Inode attributes are copied up to overlay inode (uid, gid, mode, atime, mtime, ctime) so generic code using these fields works correcty. If a hard link is created in overlayfs separate inodes are allocated for each link. If chmod/chown/etc. is performed on one of the links then the inode belonging to the other ones won't be updated. This patch attempts to fix this by sharing inodes for hard links. Use inode hash (with real inode pointer as a key) to make sure overlay inodes are shared for hard links on upper. Hard links on lower are still split (which is not user observable until the copy-up happens, see Documentation/filesystems/overlayfs.txt under "Non-standard behavior"). The inode is only inserted in the hash if it is non-directoy and upper. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-07-29ovl: store real inode pointer in ->i_privateMiklos Szeredi
To get from overlay inode to real inode we currently use 'struct ovl_entry', which has lifetime connected to overlay dentry. This is okay, since each overlay dentry had a new overlay inode allocated. Following patch will break that assumption, so need to leave out ovl_entry. This patch stores the real inode directly in i_private, with the lowest bit used to indicate whether the inode is upper or lower. Lifetime rules remain, using ovl_inode_real() must only be done while caller holds ref on overlay dentry (and hence on real dentry), or within RCU protected regions. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 10:33:26 +0000