linux/drivers/android/binderfs.c, branch v6.3

Merge tag 'char-misc-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2023-02-24T20:47:33Z

Pull char/misc and other driver subsystem updates from Greg KH: "Here is the large set of driver changes for char/misc drivers and other smaller driver subsystems that flow through this git tree. Included in here are: - New IIO drivers and features and improvments in that subsystem - New hwtracing drivers and additions to that subsystem - lots of interconnect changes and new drivers as that subsystem seems under very active development recently. This required also merging in the icc subsystem changes through this tree. - FPGA driver updates - counter subsystem and driver updates - MHI driver updates - nvmem driver updates - documentation updates - Other smaller driver updates and fixes, full details in the shortlog All of these have been in linux-next for a while with no reported problems" * tag 'char-misc-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (223 commits) scripts/tags.sh: fix incompatibility with PCRE2 firmware: coreboot: Remove GOOGLE_COREBOOT_TABLE_ACPI/OF Kconfig entries mei: lower the log level for non-fatal failed messages mei: bus: disallow driver match while dismantling device misc: vmw_balloon: fix memory leak with using debugfs_lookup() nvmem: stm32: fix OPTEE dependency dt-bindings: nvmem: qfprom: add IPQ8074 compatible nvmem: qcom-spmi-sdam: register at device init time nvmem: rave-sp-eeprm: fix kernel-doc bad line warning nvmem: stm32: detect bsec pta presence for STM32MP15x nvmem: stm32: add OP-TEE support for STM32MP13x nvmem: core: use nvmem_add_one_cell() in nvmem_add_cells_from_of() nvmem: core: add nvmem_add_one_cell() nvmem: core: drop the removal of the cells in nvmem_add_cells() nvmem: core: move struct nvmem_cell_info to nvmem-provider.h nvmem: core: add an index parameter to the cell of: property: add #nvmem-cell-cells property of: property: make #.*-cells optional for simple props of: base: add of_parse_phandle_with_optional_args() net: add helper eth_addr_add() ...

android: fix W=1 kernel-doc warnings

2023-01-19T16:14:23Z

Clean up kernel-doc notation, use correct function and parameter names. drivers/android/binderfs.c:236: warning: expecting prototype for binderfs_ctl_ioctl(). Prototype was for binder_ctl_ioctl() instead drivers/android/binder.c:386: warning: expecting prototype for binder_node_unlock(). Prototype was for binder_node_inner_unlock() instead drivers/android/binder.c:1206: warning: expecting prototype for binder_dec_ref(). Prototype was for binder_dec_ref_olocked() instead drivers/andrond/binder.c:284: warning: Excess function parameter 'proc' description in 'binder_proc_unlock' drivers/andrond/binder.c:387: warning: expecting prototype for binder_node_unlock(). Prototype was for binder_node_inner_unlock() instead Signed-off-by: Randy Dunlap Cc: Greg Kroah-Hartman Cc: Arve Hjønnevåg Cc: Todd Kjos Cc: Martijn Coenen Cc: Joel Fernandes Cc: Christian Brauner Cc: Carlos Llamas Cc: Suren Baghdasaryan Acked-by: Carlos Llamas Link: https://lore.kernel.org/r/20230117183745.20842-1-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman

fs: port ->rename() to pass mnt_idmap

2023-01-19T08:24:26Z

Convert to struct mnt_idmap. Last cycle we merged the necessary infrastructure in 256c8aed2b42 ("fs: introduce dedicated idmap type for mounts"). This is just the conversion to struct mnt_idmap. Currently we still pass around the plain namespace that was attached to a mount. This is in general pretty convenient but it makes it easy to conflate namespaces that are relevant on the filesystem with namespaces that are relevent on the mount level. Especially for non-vfs developers without detailed knowledge in this area this can be a potential source for bugs. Once the conversion to struct mnt_idmap is done all helpers down to the really low-level helpers will take a struct mnt_idmap argument instead of two namespace arguments. This way it becomes impossible to conflate the two eliminating the possibility of any bugs. All of the vfs and all filesystems only operate on struct mnt_idmap. Acked-by: Dave Chinner Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner (Microsoft)

binderfs: rework superblock destruction

2022-09-01T14:18:49Z

So far we relied on .put_super = binderfs_put_super() to destroy info we stashed in sb->s_fs_info. This gave us the required ordering between ->evict_inode() and sb->s_fs_info destruction. But the current implementation of binderfs_fill_super() has a memory leak in the rare circumstance that d_make_root() fails because ->put_super() is only called when sb->s_root is initialized. Fix this by removing ->put_super() and simply do all that work in binderfs_kill_super(). Reported-by: Dongliang Mu Signed-off-by: Al Viro Signed-off-by: Christian Brauner (Microsoft) Link: https://lore.kernel.org/r/20220823095339.853371-1-brauner@kernel.org Signed-off-by: Greg Kroah-Hartman

binderfs: remove unused INTSTRLEN macro

2022-09-01T14:17:16Z

Fix the following W=1 build error: drivers/android/binderfs.c:42: error: macro "INTSTRLEN" is not used [-Werror=unused-macros] 42 | #define INTSTRLEN 21 | No functional changes in this patch. Reviewed-by: Christian Brauner (Microsoft) Signed-off-by: Carlos Llamas Link: https://lore.kernel.org/r/20220829201254.1814484-8-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman

binder: fix redefinition of seq_file attributes

2022-07-08T13:44:19Z

The patchset in [1] exported some definitions to binder_internal.h in order to make the debugfs entries such as 'stats' and 'transaction_log' available in a binderfs instance. However, the DEFINE_SHOW_ATTRIBUTE macro expands into a static function/variable pair, which in turn get redefined each time a source file includes this internal header. This problem was made evident after a report from the kernel test robot where several W=1 build warnings are seen in downstream kernels. See the following example: include/../drivers/android/binder_internal.h:111:23: warning: 'binder_stats_fops' defined but not used [-Wunused-const-variable=] 111 | DEFINE_SHOW_ATTRIBUTE(binder_stats); | ^~~~~~~~~~~~ include/linux/seq_file.h:174:37: note: in definition of macro 'DEFINE_SHOW_ATTRIBUTE' 174 | static const struct file_operations __name ## _fops = { \ | ^~~~~~ This patch fixes the above issues by moving back the definitions into binder.c and instead creates an array of the debugfs entries which is more convenient to share with binderfs and iterate through. [1] https://lore.kernel.org/all/20190903161655.107408-1-hridya@google.com/ Fixes: 0e13e452dafc ("binder: Add stats, state and transactions files") Fixes: 03e2e07e3814 ("binder: Make transaction_log available in binderfs") Reported-by: kernel test robot Signed-off-by: Carlos Llamas Link: https://lore.kernel.org/r/20220701182041.2134313-1-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman

binderfs: add extended_error feature entry

2022-05-09T13:43:24Z

Add extended_error to the binderfs feature list, to help userspace determine whether the BINDER_GET_EXTENDED_ERROR ioctl is supported by the binder driver. Reviewed-by: Christian Brauner (Microsoft) Acked-by: Todd Kjos Signed-off-by: Carlos Llamas Link: https://lore.kernel.org/r/20220429235644.697372-4-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman

binderfs: add support for feature files

2021-07-21T11:46:36Z

Provide userspace with a mechanism to discover features supported by the binder driver to refrain from using any unsupported ones in the first place. Starting with "oneway_spam_detection" only new features are to be listed under binderfs and all previous ones are assumed to be supported. Assuming an instance of binderfs has been mounted at /dev/binderfs, binder feature files can be found under /dev/binderfs/features/. Usage example: $ mkdir /dev/binderfs $ mount -t binder binder /dev/binderfs $ cat /dev/binderfs/features/oneway_spam_detection 1 Acked-by: Christian Brauner Signed-off-by: Carlos Llamas Link: https://lore.kernel.org/r/20210715031805.1725878-1-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman

fs: make helpers idmap mount aware

2021-01-24T13:27:20Z

Extend some inode methods with an additional user namespace argument. A filesystem that is aware of idmapped mounts will receive the user namespace the mount has been marked with. This can be used for additional permission checking and also to enable filesystems to translate between uids and gids if they need to. We have implemented all relevant helpers in earlier patches. As requested we simply extend the exisiting inode method instead of introducing new ones. This is a little more code churn but it's mostly mechanical and doesnt't leave us with additional inode methods. Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.com Cc: Christoph Hellwig Cc: David Howells Cc: Al Viro Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner

binderfs: make symbol 'binderfs_fs_parameters' static

2020-09-03T16:24:39Z

The sparse tool complains as follows: drivers/android/binderfs.c:66:32: warning: symbol 'binderfs_fs_parameters' was not declared. Should it be static? This variable is not used outside of binderfs.c, so this commit marks it static. Fixes: 095cf502b31e ("binderfs: port to new mount api") Reported-by: Hulk Robot Signed-off-by: Wei Yongjun Acked-by: Christian Brauner Link: https://lore.kernel.org/r/20200818112245.43891-1-weiyongjun1@huawei.com Signed-off-by: Greg Kroah-Hartman