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* gpio: lynxpoint: Convert to use SPDX identifierAndy Shevchenko2018-12-071-15/+2
| | | | | | | | Reduce size of duplicated comments by switching to use SPDX identifier. No functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: intel-mid: Convert to use SPDX identifierAndy Shevchenko2018-12-071-9/+1
| | | | | | | | Reduce size of duplicated comments by switching to use SPDX identifier. No functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: ich: Convert to use SPDX identifierAndy Shevchenko2018-12-071-14/+1
| | | | | | | | Reduce size of duplicated comments by switching to use SPDX identifier. No functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: sodaville: Sort headers alphabeticallyAndy Shevchenko2018-12-071-3/+3
| | | | | | Sort header block alphabetically for easy maintenance. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: pch: Sort headers alphabeticallyAndy Shevchenko2018-12-071-3/+3
| | | | | | Sort header block alphabetically for easy maintenance. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: ich: Sort headers alphabeticallyAndy Shevchenko2018-12-071-3/+3
| | | | | | Sort header block alphabetically for easy maintenance. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: sch: Remove linux/init.h and sort headersAndy Shevchenko2018-12-071-6/+5
| | | | | | | | | | | There is no need to include linux/init.h when at the same time we include linux/module.h. Remove redundant inclusion. While here, sort header block alphabetically for easy maintenance. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: merrifield: Remove linux/init.hAndy Shevchenko2018-12-071-1/+0
| | | | | | | | | There is no need to include linux/init.h when at the same time we include linux/module.h. Remove redundant inclusion. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: lynxpoint: Remove linux/init.h and sort headersAndy Shevchenko2018-12-071-8/+7
| | | | | | | | | | | There is no need to include linux/init.h when at the same time we include linux/module.h. Remove redundant inclusion. While here, sort header block alphabetically for easy maintenance. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: intel-mid: Remove linux/module.h and sort headersAndy Shevchenko2018-12-071-4/+2
| | | | | | | | | | | | There is no need to include linux/module.h when at the same time we include linux/init.h. Remove redundant inclusion. While here, remove no-op macro and sort header block alphabetically for easy maintenance. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: pch: Remove duplicate assignmentsAndy Shevchenko2018-12-071-4/+1
| | | | | | There is no need to assign the same values which core does for us anyway. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: pch: Remove redundant __func__ from debug printAndy Shevchenko2018-12-071-7/+4
| | | | | | | | | dev_dbg includes the function name & line number by default when dynamic debugging is enabled. Hence __func__ is redundant here and removed. Do the same for any messages in ->probe() since it doesn't make sense. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: ich: Join string literals backAndy Shevchenko2018-12-071-3/+2
| | | | | | | | | For easy grepping on debug purposes join string literals back in the messages. While here, fix spelling typo. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: ich: Convert pr_<level> to dev_<level>Andy Shevchenko2018-12-071-6/+5
| | | | | | Instead of customized pr_<level> format use unified dev_<level> output. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: ich: Switch to use struct device instead of platform_deviceAndy Shevchenko2018-12-071-10/+11
| | | | | | | There is no need to have a pointer to struct platform_device. Instead, switch to use struct device one. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: ich: Simplify error handling in ichx_write_bit()Andy Shevchenko2018-12-071-12/+3
| | | | | | | Simplify error handling in ichx_write_bit() and propagate its error code to the caller. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: sodaville: Use for_each_set_bit() in IRQ handlerAndy Shevchenko2018-12-071-6/+3
| | | | | | | This simplifies and standardizes the AB IRQ handler by using the for_each_set_bit() library function. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: pch: Use for_each_set_bit() in IRQ handlerAndy Shevchenko2018-12-071-8/+6
| | | | | | | This simplifies and standardizes the AB IRQ handler by using the for_each_set_bit() library function. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: lynxpoint: Use for_each_set_bit() in IRQ handlerAndy Shevchenko2018-12-031-5/+7
| | | | | | | This simplifies and standardizes the AB IRQ handler by using the for_each_set_bit() library function. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: pch: Convert to dev_pm_opsAndy Shevchenko2018-12-031-40/+13
| | | | | | | | | | Convert the legacy system PM callbacks to new ones. Meanwhile, remove the redundant calls to the PCI for changing a power state since it's done by bus code. While here, remove weird indentation with backslash in use. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: sodaville: Convert to use managed functions pcim_* and devm_*Andy Shevchenko2018-12-021-34/+18
| | | | | | | This makes the error handling much more simpler than open-coding everything and in addition makes the probe function smaller an tidier. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* gpio: pch: Convert to use managed functions pcim_* and devm_*Andy Shevchenko2018-12-021-52/+12
| | | | | | | This makes the error handling much more simpler than open-coding everything and in addition makes the probe function smaller an tidier. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* MAINTAINERS: Do maintain Intel GPIO drivers via separate treeAndy Shevchenko2018-11-091-12/+21
| | | | | | | We would like to consolidate Intel pure GPIO drivers, including PMICs and some old x86 platforms, in one tree which is maintained by Intel. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* Linux 4.20-rc1v4.20-rc1Linus Torvalds2018-11-051-2/+2
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* Merge tag 'tags/upstream-4.20-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds2018-11-0425-292/+2418
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull UBIFS updates from Richard Weinberger: - Full filesystem authentication feature, UBIFS is now able to have the whole filesystem structure authenticated plus user data encrypted and authenticated. - Minor cleanups * tag 'tags/upstream-4.20-rc1' of git://git.infradead.org/linux-ubifs: (26 commits) ubifs: Remove unneeded semicolon Documentation: ubifs: Add authentication whitepaper ubifs: Enable authentication support ubifs: Do not update inode size in-place in authenticated mode ubifs: Add hashes and HMACs to default filesystem ubifs: authentication: Authenticate super block node ubifs: Create hash for default LPT ubfis: authentication: Authenticate master node ubifs: authentication: Authenticate LPT ubifs: Authenticate replayed journal ubifs: Add auth nodes to garbage collector journal head ubifs: Add authentication nodes to journal ubifs: authentication: Add hashes to index nodes ubifs: Add hashes to the tree node cache ubifs: Create functions to embed a HMAC in a node ubifs: Add helper functions for authentication support ubifs: Add separate functions to init/crc a node ubifs: Format changes for authentication support ubifs: Store read superblock node ubifs: Drop write_node ...
| * ubifs: Remove unneeded semicolonDing Xiang2018-10-231-1/+1
| | | | | | | | | | | | | | delete redundant semicolon Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com> Signed-off-by: Richard Weinberger <richard@nod.at>
| * Documentation: ubifs: Add authentication whitepaperSascha Hauer2018-10-231-0/+426
| | | | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Enable authentication supportSascha Hauer2018-10-233-1/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | With the preparations all being done this patch now enables authentication support for UBIFS. Authentication is enabled when the newly introduced auth_key and auth_hash_name mount options are passed. auth_key provides the key which is used for authentication whereas auth_hash_name provides the hashing algorithm used for this FS. Passing these options make authentication mandatory and only UBIFS images that can be authenticated with the given key are allowed. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Do not update inode size in-place in authenticated modeSascha Hauer2018-10-233-38/+113
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In authenticated mode we cannot fixup the inode sizes in-place during recovery as this would invalidate the hashes and HMACs we stored for this inode. Instead, we just write the updated inodes to the journal. We can only do this after ubifs_rcvry_gc_commit() is done though, so for authenticated mode call ubifs_recover_size() after ubifs_rcvry_gc_commit() and not vice versa as normally done. Calling ubifs_recover_size() after ubifs_rcvry_gc_commit() has the drawback that after a commit the size fixup information is gone, so when a powercut happens while recovering from another powercut we may lose some data written right before the first powercut. This is why we only do this in authenticated mode and leave the behaviour for unauthenticated mode untouched. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Add hashes and HMACs to default filesystemSascha Hauer2018-10-231-7/+27
| | | | | | | | | | | | | | | | | | This patch calculates the necessary hashes and HMACs for the default filesystem so that the dynamically created default fs can be authenticated. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: authentication: Authenticate super block nodeSascha Hauer2018-10-231-1/+69
| | | | | | | | | | | | | | | | | | This adds a HMAC covering the super block node and adds the logic that decides if a filesystem shall be mounted unauthenticated or authenticated. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Create hash for default LPTSascha Hauer2018-10-233-3/+23
| | | | | | | | | | | | | | | | | | During creation of the default filesystem on an empty flash the default LPT is created. With this patch a hash over the default LPT is calculated which can be added to the default filesystems master node. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubfis: authentication: Authenticate master nodeSascha Hauer2018-10-233-10/+61
| | | | | | | | | | | | | | | | The master node contains hashes over the root index node and the LPT. This patch adds a HMAC to authenticate the master node itself. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: authentication: Authenticate LPTSascha Hauer2018-10-233-0/+134
| | | | | | | | | | | | | | | | | | | | | | The LPT needs to be authenticated aswell. Since the LPT is only written during commit it is enough to authenticate the whole LPT with a single hash which is stored in the master node. Only the leaf nodes (pnodes) are hashed which makes the implementation much simpler than it would be to hash the complete LPT. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Authenticate replayed journalSascha Hauer2018-10-231-2/+144
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Make sure that during replay all buds can be authenticated. To do this we calculate the hash chain until we find an authentication node and check the HMAC in that node against the current status of the hash chain. After a power cut it can happen that some nodes have been written, but not yet the authentication node for them. These nodes have to be discarded during replay. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Add auth nodes to garbage collector journal headSascha Hauer2018-10-231-3/+43
| | | | | | | | | | | | | | | | To be able to authenticate the garbage collector journal head add authentication nodes to the buds the garbage collector creates. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Add authentication nodes to journalSascha Hauer2018-10-236-18/+153
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Nodes that are written to flash can only be authenticated through the index after the next commit. When a journal replay is necessary the nodes are not yet referenced by the index and thus can't be authenticated. This patch overcomes this situation by creating a hash over all nodes beginning from the commit start node over the reference node(s) and the buds themselves. From time to time we insert authentication nodes. Authentication nodes contain a HMAC from the current hash state, so that they can be used to authenticate a journal replay up to the point where the authentication node is. The hash is continued afterwards so that theoretically we would only have to check the HMAC of the last authentication node we find. Overall we get this picture: ,,,,,,,, ,......,........................................... ,. CS , hash1.----. hash2.----. ,. | , . |hmac . |hmac ,. v , . v . v ,.REF#0,-> bud -> bud -> bud.-> auth -> bud -> bud.-> auth ... ,..|...,........................................... , | , , | ,,,,,,,,,,,,,,, . | hash3,----. , | , |hmac , v , v , REF#1 -> bud -> bud,-> auth ... ,,,|,,,,,,,,,,,,,,,,,, v REF#2 -> ... | V ... Note how hash3 covers CS, REF#0 and REF#1 so that it is not possible to exchange or skip any reference nodes. Unlike the picture suggests the auth nodes themselves are not hashed. With this it is possible for an offline attacker to cut each journal head or to drop the last reference node(s), but not to skip any journal heads or to reorder any operations. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: authentication: Add hashes to index nodesSascha Hauer2018-10-237-14/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | With this patch the hashes over the index nodes stored in the tree node cache are written to flash and are checked when read back from flash. The hash of the root index node is stored in the master node. During journal replay the hashes are regenerated from the read nodes and stored in the tree node cache. This means the nodes must previously be authenticated by other means. This is done in a later patch. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Add hashes to the tree node cacheSascha Hauer2018-10-234-30/+135
| | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of the UBIFS authentication support every branch in the index gets a hash covering the referenced node. To make that happen the tree node cache needs hashes over the nodes. This patch adds a hash argument to ubifs_tnc_add() and ubifs_tnc_add_nm(). The hashes are calculated from the callers of these functions which actually prepare the nodes. With this patch all the leaf nodes of the index tree get hashes, but currently nothing is done with these hashes, this is left for a later patch. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Create functions to embed a HMAC in a nodeSascha Hauer2018-10-232-6/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | With authentication support some nodes (master node, super block node) get a HMAC embedded into them. This patch adds functions to prepare and write such a node. The difficulty is that besides the HMAC the nodes also have a CRC which must stay valid. This means we first have to initialize all fields in the node, then calculate the HMAC (not covering the CRC) and finally calculate the CRC. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Add helper functions for authentication supportSascha Hauer2018-10-234-0/+722
| | | | | | | | | | | | | | | | | | | | | | This patch adds the various helper functions needed for authentication support. We need functions to hash nodes, to embed HMACs into a node and to compare hashes and HMACs. Most functions first check if this filesystem is authenticated and bail out early if not, which makes the functions safe to be called with disabled authentication. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Add separate functions to init/crc a nodeSascha Hauer2018-10-232-15/+29
| | | | | | | | | | | | | | | | | | | | When adding authentication support we will embed a HMAC into some nodes. To prepare these nodes we have to first initialize the nodes, then add a HMAC and finally add a CRC. To accomplish this add separate ubifs_init_node/ubifs_crc_node functions. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Format changes for authentication supportSascha Hauer2018-10-233-3/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the changes to the on disk format needed for authentication support. We'll add: * a HMAC covering super block node * a HMAC covering the master node * a hash over the root index node to the master node * a hash over the LPT to the master node * a flag to the filesystem flag indicating the filesystem is authenticated * an authentication node necessary to authenticate the nodes written to the journal heads while they are written. * a HMAC of a well known message to the super block node to be able to check if the correct key is provided And finally, not visible in this patch, nevertheless explained here: * hashes over the referenced child nodes in each branch of a index node Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Store read superblock nodeSascha Hauer2018-10-233-22/+8
| | | | | | | | | | | | | | | | | | | | | | | | The superblock node is read/modified/written several times throughout the UBIFS code. Instead of reading it from the device each time just keep a copy in memory and write back the modified copy when necessary. This patch helps for authentication support, here we not only have to read the superblock node, but also have to authenticate it, which is easier if we do it once during initialization. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Drop write_nodeSascha Hauer2018-10-231-34/+5
| | | | | | | | | | | | | | | | write_node() is used only once and can easily be replaced with calls to ubifs_prepare_node()/write_head() which makes the code a bit shorter. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Implement ubifs_lpt_lookup using ubifs_pnode_lookupSascha Hauer2018-10-231-18/+2
| | | | | | | | | | | | | | | | | | ubifs_lpt_lookup() starts by looking up the nth pnode in the LPT. We already have this functionality in ubifs_pnode_lookup(). Use this function rather than open coding its functionality. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Export pnode_lookup as ubifs_pnode_lookupSascha Hauer2018-10-233-36/+37
| | | | | | | | | | | | | | | | | | ubifs_lpt_lookup could be implemented using pnode_lookup. To make that possible move pnode_lookup from lpt.c to lpt_commit.c. Rename it to ubifs_pnode_lookup since it's now exported. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Pass ubifs_zbranch to read_znode()Sascha Hauer2018-10-231-5/+6
| | | | | | | | | | | | | | | | | | | | | | read_znode() takes len, lnum and offs arguments which the caller all extracts from the same struct ubifs_zbranch *. When adding authentication support we would have to add a pointer to a hash to the arguments which is also part of struct ubifs_zbranch. Pass the ubifs_zbranch * instead so that we do not have to add another argument. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Pass ubifs_zbranch to try_read_node()Sascha Hauer2018-10-231-7/+7
| | | | | | | | | | | | | | | | | | | | | | try_read_node() takes len, lnum and offs arguments which the caller all extracts from the same struct ubifs_zbranch *. When adding authentication support we would have to add a pointer to a hash to the arguments which is also part of struct ubifs_zbranch. Pass the ubifs_zbranch * instead so that we do not have to add another argument. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Refactor create_default_filesystem()Sascha Hauer2018-10-231-48/+47
| | | | | | | | | | | | | | | | | | | | | | | | create_default_filesystem() allocates memory for a node, writes that node and frees the memory directly afterwards. With this patch we allocate memory for all nodes at the beginning of the function and free the memory at the end. This makes it easier to implement authentication support since with authentication support we'll need the contents of some nodes when creating other nodes. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
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