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* 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>
| * mount: support filesystem options passed via -oUwe Kleine-König2014-02-101-6/+13
| | | | | | | | | | | | | | | | | | | | | | Similar to mount(8) the barebox command mount now supports passing a string to the file system driver via -o. This is used in the next commit to let the user specify port numbers for nfs mounts. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | read_file: Use read_fullSascha Hauer2014-02-131-1/+2
|/ | | | | | | | At least NFS does not fulfill read requests > 1024 bytes at once. Use read_full in read_file as read doesn't guarantee that the whole request can be read at once. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Fix endless loop in automount codeSascha Hauer2013-11-271-0/+2
| | | | | | | | | | A chdir to a path registered as an automount path followed by a 'ls' results in an endless loop. This happens because the command the automounter executes results in another automount request. Fix this by running the automounter from the chdir code before the cwd is actually changed. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: Add function to get cdev by mountpathSascha Hauer2013-11-051-0/+13
| | | | | | This is useful to know for the bootloader spec implementation. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: ignore O_TRUNC open flag for devicesSascha Hauer2013-10-161-2/+1
| | | | | | | | | | | | | | | | | | The O_TRUNC flag has to be ignored when opening devices. Otherwise cp /somefile /dev/somedev fails. This is broken since: | commit d4f5bb1e011ac653a167031554f0ac9e028e9e36 | Author: Sascha Hauer <s.hauer@pengutronix.de> | Date: Sat Sep 28 13:12:50 2013 +0200 | | copy_file: Add missing O_TRUNC | | Without it, when copying a smaller file over a larger file the | resulting file still has the remaining space from the larger file. | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: add cdev mount helpersSascha Hauer2013-09-301-0/+80
| | | | | | | Introduce helpers to iterate over cdevs and mount them to a known path. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: use bus_for_each_driverSascha Hauer2013-09-291-4/+1
| | | | | | Instead of using for_each_driver and testing for the bus type. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: cleanup backingstore handlingSascha Hauer2013-09-291-8/+20
| | | | | | | | | | | All filesystem drivers which need a backingstore device do the same ignoring of '/dev/' in the backingstore followed by a cdev_open. Add a helper function for it and let the core handle the cdev. As a side effect this makes sure that fsdev->cdev is also set when a device is mounted without the leading '/dev/' which was previously ignored by the mount code. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* read_file: Make it work on tftp servers which do not pass sizeSascha Hauer2013-06-201-0/+18
| | | | | | | | Some tftp servers (for example netkit-tftp) do not pass the filesize. Add a workaround for read_file which reads the file into a temporary file which then is copied to a buffer. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: allocate FILE table dynamicallySascha Hauer2013-03-141-4/+7
| | | | | | | | | Some systems are runnignfrom a very limited SRAM, but have a huge malloc space in SDRAM. The bss normally is in SRAM, so we should avoid having big structures there. The FILE table is 5120 bytes big, so allocate it dynamically instead. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: add pread and pwrite functionsAlexander Aring2013-02-201-14/+74
| | | | | | | | | | | | | | | Add pread and pwrite functions. Split read and write functions to save some space. The functions pread and pwrite saves and sets the file position to a given offset and restore them afterwards. This also makes the nandtest command use these function which is necessary to not break compilation for the nandtest command. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: fix return type of readAlexander Aring2013-02-181-1/+1
| | | | | Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Add write_file functionSascha Hauer2013-01-191-0/+19
| | | | | | | write_file() will write a buffer to a file. The file is created if necessary. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* drivers/base: fix corrupt device treeSascha Hauer2012-12-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dev_add_child is a very unsafe function. If called multiple times it allows setting the same device to different parents thus corrupting the siblings list. This happens regularly since: | commit c2e568d19c5c34a05a1002d25280bf113b72b752 | Author: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | Date: Sat Nov 3 16:11:05 2012 +0100 | | bus: add bus device | | automatically add it as parent of any bus device if none already specified | | we have now a nice output per bus If for example a FATfs is mounted this nice output per bus often ends with: > `---- fat0 > `---- 0 > `---- 0x86f0000087020031-0x86f000410df27124: /dev/<NULL> > `---- sram00 > `---- 0x00000000-0xffffffffffffffff: /dev/<NULL> > `---- 0x00000000-0xffffffffffffffff: /dev/<NULL> > unable to handle NULL pointer dereference at address 0x0000000c > pc : [<87f08a20>] lr : [<87f08a04>] > sp : 86eff8c0 ip : 87f3fbde fp : ffffffff > r10: ffffffff r9 : 00000000 r8 : 00000003 > r7 : 86f075b8 r6 : 00000002 r5 : ffffffec r4 : 86f07544 > r3 : 00000000 r2 : 43f900b4 r1 : 00000020 r0 : 00000005 > Flags: Nzcv IRQs off FIQs off Mode SVC_32 > [<87f08a20>] (do_devinfo_subtree+0x90/0x130) from [<87f08a90>] (do_devinfo_subtree+0x100/0x130) > > [<87f3e070>] (unwind_backtrace+0x0/0x90) from [<87f28514>] (panic+0x28/0x3c) > [<87f28514>] (panic+0x28/0x3c) from [<87f3e4b8>] (do_exception+0x10/0x14) > [<87f3e4b8>] (do_exception+0x10/0x14) from [<87f3e544>] (do_data_abort+0x2c/0x38) > [<87f3e544>] (do_data_abort+0x2c/0x38) from [<87f3e268>] (data_abort+0x48/0x60) This patch fixes this by adding a device to its parents children list in register_device so that dev_add_child is no longer needed. This function is removed from the tree. Now callers of register_device have to clearly set the parent *before* registering a device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Reported-by: Jan Lübbe <jlu@pengutronix.de>
* fs: move dev_add_child before device_registerSascha Hauer2012-12-121-5/+5
| | | | | | Biology tells us that the parent is known before the child is born. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: improve robustnessVicente2012-10-081-9/+18
| | | | | Signed-off-by: Vicente <vicencb@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/remove-fsf-address'Sascha Hauer2012-10-031-3/+0
|\ | | | | | | | | | | Conflicts: drivers/net/miidev.c include/miidev.h
| * Treewide: remove address of the Free Software FoundationSascha Hauer2012-09-171-3/+0
| | | | | | | | | | | | | | The FSF address has changed in the past. Instead of updating it each time the address changes, just drop it completely treewide. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | Merge branch 'for-next/driver'Sascha Hauer2012-10-031-0/+6
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| * driver: register busJean-Christophe PLAGNIOL-VILLARD2012-09-231-0/+6
| | | | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | fs: fs.c fix castAlexander Aring2012-09-111-2/+6
|/ | | | | | | Fix casting on min argument, to avoid warnings on 64bit build. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/link'Sascha Hauer2012-09-051-7/+222
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| * fs: introduce get_mounted_path to get the path where a file is mountedJean-Christophe PLAGNIOL-VILLARD2012-09-051-0/+9
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * fs: open: add symlink supportJean-Christophe PLAGNIOL-VILLARD2012-09-051-4/+11
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * fs: implement statJean-Christophe PLAGNIOL-VILLARD2012-09-051-0/+105
| | | | | | | | | | | | stat() stats the file pointed to by path and fills in buf. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * fs: add symlink supportJean-Christophe PLAGNIOL-VILLARD2012-09-051-0/+51
| | | | | | | | | | | | Limit it's support to existing file only Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * fs: rename stat to lstat as we implement lstatJean-Christophe PLAGNIOL-VILLARD2012-09-051-5/+5
| | | | | | | | | | | | | | For compatibility put a inline on lstat for stat until we have the symlink support. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * fs: fix rmdir with symlinkJean-Christophe PLAGNIOL-VILLARD2012-09-051-0/+6
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
| * fs: add readlink supportJean-Christophe PLAGNIOL-VILLARD2012-09-051-0/+37
| | | | | | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* | fs/mount: add autodetection type supportJean-Christophe PLAGNIOL-VILLARD2012-09-041-1/+29
|/ | | | | | if NULL is pass as type mount will try to autodetect the filesystem type Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* fs: fix standard zero, full devicesSascha Hauer2012-07-041-4/+4
| | | | | | | | | | | | | | | | The standard devices are currently broken since they have the size ~0. As now files use loff_t as file size which is a signed type the read implementation gets confused and now returns -1. The current implementation also has the (somewhat theorical) problem that we do not have real streaming devices, so /dev/zero went out of zeroes after reading 4GB (or now LLONG_MAX). This patch introduces a new cdev flag DEVFS_IS_CHARACTER_DEV and a new file size flag FILE_SIZE_STREAM which makes it possible to create real stream devices instead. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/resource-size'Sascha Hauer2012-07-021-2/+2
|\ | | | | | | | | | | Conflicts: drivers/base/resource.c fs/fs.c
| * resource: store 'end' instead of 'size' in struct resourceSascha Hauer2012-07-011-2/+2
| | | | | | | | | | | | | | | | | | | | Storing the size instead of the resource end in struct resource was a mistake. 'size' ranges from 0 to UINT[32|64]_MAX + 1 which obviously leads to problems. 'end' on the other hand will never exceed UINT[32|64]_MAX. Also this way we can express a iomem region covering the whole address space. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | Merge branch 'for-next/fs'Sascha Hauer2012-07-021-0/+30
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| * | fs: Fix file create bug when parent is not a directorySascha Hauer2012-06-301-0/+30
| |/ | | | | | | | | | | | | When creating a file or a directory we have to check if the parent is actually a directory. Otherwise trying it results in a crash. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | make cdev 64bit capableSascha Hauer2012-06-301-1/+1
| | | | | | | | | | | | Next step to 64bit support: Make cdev size a 64bit type. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | use loff_t for file offsetsSascha Hauer2012-06-301-5/+5
|/ | | | | | | This is a first step for 64bit file support: Make the file sizes/offsets 64bit. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs: limit flash erase and protect to the partiton boundaryJohannes Stezenbach2012-06-071-10/+8
| | | | | | | | | | | | | Passing a too large size or offset to erase could affect flash outside the partition boundary. Addresses for SPI flash wrap around, thus giving a count + offset going past the end of the flash would wrap around and erase flash at offset 0. Add the same check for protect. Signed-off-by: Johannes Stezenbach <js@sig21.net> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* lseek: return -1 instead of -errnoSascha Hauer2012-05-181-2/+2
| | | | | | | | | | The patch making errno a positive value has another bug: lseek was switched to return -errno instead of -1. This does not work since we can lseek we can address the whole 4G address space, have of which has a negative offset when interpreted as a signed integer. Let lseek return -1 on failure again instead. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fs readdir: check for NULL pointer againSascha Hauer2012-05-141-0/+3
| | | | | | | | | | | | | | | | | This got lost in: commit 6188685091c58c9772b990cf0ca6ac522f97a9d0 Author: Sascha Hauer <s.hauer@pengutronix.de> Date: Sun May 13 12:43:58 2012 +0200 Make errno a positive value Normally errno contains a positive error value. A certain unnamed developer mixed this up while implementing U-Boot-v2. Also, normally errno is never set to zero by any library function. This patch fixes this. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Make errno a positive valueSascha Hauer2012-05-141-132/+218
| | | | | | | | | Normally errno contains a positive error value. A certain unnamed developer mixed this up while implementing U-Boot-v2. Also, normally errno is never set to zero by any library function. This patch fixes this. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* automount: remove existing automountpointSascha Hauer2012-04-151-0/+2
| | | | | | | Before creating a new mountpoint on an already existing mountpoint we have to remove it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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