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* fs: fix memory access via /dev/mem for MIPS64Peter Mamonov2018-06-141-2/+2
| | | | | | | | lseek checks for non-negative in-memory offsets (addresses), failing otherwise. However negative address 0xffffffffXXXXXXXX is a valid MIPS64 virtual address. Signed-off-by: Peter Mamonov <pmamonov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Fix finding correct directory for mkdir/rmdirSascha Hauer2018-04-061-2/+2
| | | | | | | When there are links in the path mkdir/rmdir are called with then canonicalize_path is needed which resolves the links. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Cleanup whitespace damageSascha Hauer2018-04-061-13/+13
| | | | | | fs.c has some whitespaces where there should be tabs. Fix it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Move mem_write/mem_read to devfs-coreSascha Hauer2018-04-061-66/+0
| | | | | | | fs.c is already heavily filled with code. Move mem_write/mem_read to devfs-core where it fits better. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: check pointer returned by get_fsdevice_by_path before dereferencingGaël PORTAY2018-03-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In __canonicalize_path() we dereference the pointer returned by get_fsdevice_by_path() without checking if the pointer is NULL or not. When the pointer is NULL it leads to an Ooops. Ooops, address error on load or ifetch! $ 0 : 00000000 00000001 a0000026 a0811c10 $ 4 : a0402e60 a0402e48 a0811c00 a0402e58 $ 8 : 00000001 00000000 0000005a 00000023 $12 : 00000000 00000002 00601021 00000000 $16 : a0402e60 a0402e50 a0402e39 a0810000 $20 : a0402e38 a0811420 a0811424 00000000 $24 : 00000000 a080de10 $28 : 87f87d40 a03ffa68 a0810000 a080ce30 Hi : 00000002 Lo : 00000000 epc : a080ce34 ra : a080ce30 Status: 00000006 Cause : 40008010 Config: 80040483 ### ERROR ### Please RESET the board ### Fixes: d79a81736 fs: Don't bother filesystems without link support with additional stat() calls Signed-off-by: Gaël PORTAY <gael.portay@savoirfairelinux.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/tftp-workaround'Sascha Hauer2018-02-081-0/+22
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| * fs: implement is_tftp_fs()Sascha Hauer2018-01-251-0/+22
| | | | | | | | | | | | | | | | | | | | Some commands need files in which they can lseek backwards which is particularly not possible on TFTP. Instead of hiding this behind can_lseek_backward() create a function for it which tests if the file is on TFTP directly rather than using different lseek operations. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fs: add support loop mount offsetPhilipp Zabel2018-02-051-3/+9
| | | | | | | | | | | | | | | | When loop mounting, allow to specify an offset into the file, similarly to the losetup offset option. Multiplicative suffixes are supported. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fs: Fix memory leak in mount()Sascha Hauer2018-01-261-0/+2
|/ | | | | | | | "path" is allocated by normalise_path() and thus must be freed. This was done in the error path, but not in the success path. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/misc'Sascha Hauer2018-01-221-2/+1
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| * move parseopt to lib/Antony Pavlov2018-01-171-2/+1
| | | | | | | | | | Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fs: implement ftruncateSascha Hauer2018-01-101-0/+22
|/ | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Don't bother filesystems without link support with additional stat() callsSascha Hauer2017-09-061-0/+10
| | | | | | | | | | | | | In __canonicalize_path() we only call stat() to know if the path is a link or not. When the filesystem doesn't support links we already know that it's not a link, so we do not need to call stat(). This helps the tftp filesystem since the parent directories of a file to be opened won't be stat()ed anymore, something tftp does not support. Fixes: a602bebc fs: Implement links to directories Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: avoid pathes with '//' in __canonicalize_path()Sascha Hauer2017-09-061-2/+7
| | | | | | | | | In __canonicalize_path pathes beginning with '//' can occur. This is normally not a problem since normalize_path() will clean this up, but it means we cannot call get_fsdevice_by_path() on these pathes in this function, as needed in the next patch. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Make locally used function canonicalize_dir() staticSascha Hauer2017-06-271-1/+1
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/misc'Sascha Hauer2017-06-141-4/+32
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| * fs: add cdev_create_loop and cdev_remove_loop for loop mount optionPhilipp Zabel2017-06-061-4/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow to create a loopback cdev from a file. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Fixed up with: fs: Makefile: Add parseopt to all builds parseopt.h was included to fs.c with commit 9248b, but parseopt.o has a dependency to CONFIG_FS_NFS. Moved parseopt.o to the default build to eliminate build failures. Signed-off-by: Daniel Schultz <d.schultz@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * fs: Create automount entries for the default mount pathesSascha Hauer2017-05-101-0/+14
| | | | | | | | | | | | | | | | | | | | In barebox the default mount path for a cdev is /mnt/<cdevname> which can be mounted with "mount <cdevname>" without specifying a target path explicitly. Simplify this further by creating automount entries for the default mount pathes which makes a manual mount completely unnecessary. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fixup! fs: Implement links to directoriesSascha Hauer2017-05-111-2/+2
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* | fs: Implement links to directoriesSascha Hauer2017-05-111-118/+169
| | | | | | | | | | | | | | | | | | | | | | | | So far links can only point to files. Implement links to directories. With this all kinds of links are supported: - relative links - absolute links - links including ".." - link loops (are detected, return -EMLINK) Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fs: drop path_check_prereq()Sascha Hauer2017-05-111-65/+48
|/ | | | | | | | | | | | | | | | | path_check_prereq() has some bugs: - It's called with S_IFLNK, but this is effectively a no-op because this case is not implemented in the function - It uses lstat, but if stat or lstat should be used depends on the usecase: For opendir() stat() must be used, since we are not interested in the link, but in the target. For readlink() lstat() must be used since we are indeed interested in the link, not the target. It's easier and better understandable to open code the functionality where it's needed, so drop path_check_prereq() and do the right thing where called. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* lseek: tighten error checking and allow negative offsets for SEEK_ENDUwe Kleine-König2017-03-031-2/+4
| | | | | Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* lseek: ensure errno is set on failure and return -1Uwe Kleine-König2017-03-021-1/+7
| | | | | | | | All error paths before calling the driver's lseek callback return -1 and set errno. Do the same if the callback returns an error. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Remove O_TRUNC check for devices when open filesTeresa Remmet2017-01-111-1/+1
| | | | | | | | Don't check for the file type here. Devices may have truncate callbacks. Otherwise the caller should check if O_TRUNC is possible. Signed-off-by: Teresa Remmet <t.remmet@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Check for correct open modeSascha Hauer2016-07-221-1/+11
| | | | | | | Check that readonly openen files is not written to and writeonly files is not read from. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/include-cleanup'Sascha Hauer2016-05-091-3/+6
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| * move make_directory declaration to libfile.hSascha Hauer2016-04-151-0/+1
| | | | | | | | | | | | | | As a utility function for file handling make_directory() is well suited for libfile. Move it there. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * string: Fix (v)asprintf prototypesSascha Hauer2016-04-151-3/+4
| | | | | | | | | | | | | | | | | | | | Our asprintf and vasprintf have different prototypes than the glibc functions. This causes trouble when we want to share barebox code with userspace code. Change the prototypes for (v)asprintf to match the glibc prototypes. Since the current (v)asprintf are convenient to use change the existing functions to b(v)asprintf. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * include: move run_command prototype to command.hSascha Hauer2016-04-151-0/+1
| | | | | | | | | | | | run_command fits much better into command.h, move it there. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fix erasing/protecting flashes with unspecified sizeSascha Hauer2016-04-191-1/+3
|/ | | | | | | | | | | | | | | | | fixes: 81737c1 mtd: Fix erasing of devices >4GiB Several places erased a complete flash partition passing ~0 as count to erase(). With the above commit count to erase was changed from an unsigned type to a signed type, so the (count > f->size - offset) check in erase() no longer triggers and the ~0 count is no longer adjusted to the whole device size. Among other things this results in saveenv failures on NOR flashes. This patch fixes this by introducing an explicit macro for erasing the whole device which is tested for in erase(). All other negative values are rejected. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Reported-by: Giorgio <giorgio.nicole@arcor.de>
* fs: umount based on device path and mount pathMarkus Pargmann2016-04-081-3/+45
| | | | | | | umount on Linux can be used on a mount pathes and device pathes. This patch adds this functionality to barebox. Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
* mtd: Fix erasing of devices >4GiBSascha Hauer2016-02-091-1/+1
| | | | | | | | | When a device >4GiB is erased, not only the offset can be bigger than 4GiB, but also the size. This happens with the simplest command to erase a device: erase /dev/nand0. Make the size argument a 64bit type to make this work. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: automount: Make automountpoints persistentSascha Hauer2016-01-081-3/+4
| | | | | | | Do not remove the automountpoints when they are mounted. This way they can be reused when they have been unmounted. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: pass path directly to cdev_openSascha Hauer2015-10-151-6/+1
| | | | | | | Now that cdev_open handles a path we no longer have to add /dev/ to the name. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* filetype: Use cdev_openSascha Hauer2015-10-151-2/+0
| | | | | | | a cdev has to be opened before usage. Use cdev_open instead of cdev_by_name. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Fix filesystem detection with full pathPeter Mamonov2015-10-131-1/+5
| | | | | | | | | | | | | When mount is given a full path (including /dev/) to the cdev file we can no longer automatically detect the filesystem. This is broken since: e89f1a1 detect_fs: use device instead of file Fix it by dropping the /dev/ component of the path. Signed-off-by: Peter Mamonov <pmamonov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* detect_fs: use device instead of fileVicente Bergas2015-10-021-1/+1
| | | | | | | | detect_fs would usually mount a device on a directory, so, use a device-specific type detection. Signed-off-by: Vicente Bergas <vicencb@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Add device parameter for Linux root= optionSascha Hauer2015-06-181-0/+37
| | | | | | | | | | When registering a filesystem device add a device parameter suitable for the Linux root= option to boot from exactly this filesystem. Currently the fs layer sets this parameter to the root=PARTUUID= mechanism if a partuuid is available. Other filesystems like NFS and UBIFS which do not have a PARTUUID can overwrite this. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/misc'Sascha Hauer2015-06-091-8/+5
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| * mem: Fix memcpy_sz variable typesSascha Hauer2015-05-151-8/+5
| | | | | | | | | | | | | | | | - Drop usage of 'ulong', use unsigned long - remove unnecessary intermediate casting to unsigned long - Use proper u8/u16/u32 types. Fixes 64bit systems on which ulong is 64bit Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fs: Add O_RWSIZE_8Sascha Hauer2015-05-281-0/+3
|/ | | | | | To support native 64bit accesses in memcpy_sz. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: make "offset" parameter of erase() and protect() 64 bit safeMarc Kleine-Budde2015-03-031-2/+2
| | | | | Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: implement fstatSascha Hauer2014-10-081-0/+16
| | | | | | | fstat is useful to get information about an already opened file. Add it to barebox. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Store the path in struct filepSascha Hauer2014-10-081-0/+5
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: do not lookup global FILE * when the file is already availableSascha Hauer2014-10-081-1/+1
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: store pointer to fsdev instead of dev in struct filepSascha Hauer2014-10-081-48/+27
| | | | | | | | The struct device_d * in struct filep is never of interest, instead it is always converted to a struct fs_device_d *, so simplify the code by storing the struct fs_device_d * directly. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* move file helper functions to separate fileSascha Hauer2014-08-071-72/+0
| | | | | | | | | | We have our file helper functions in several places. Move them all to lib/libfile.c. With this we no longer have file helpers in fs/fs.c which contains the core fs functions and no functions in lib/libbb.c which are not from busybox. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* automount: check for recursive automountSascha Hauer2014-07-031-1/+9
| | | | | | | | | | | | | automount_mount calls run_command which may trigger an automount again. This results in an endless loop. A simple way to trigger this is: mkdir /x; automount /x false; cd /x; something Use a static variable to detect if we are currently in automount_mount() and bail out if we are. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/nfs'Sascha Hauer2014-03-071-7/+14
|\ | | | | | | | | Conflicts: defaultenv/defaultenv-2-base/bin/ifup
| * run_command: remove unused flag parameterSascha Hauer2014-03-071-1/+1
| | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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