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path: root/drivers/char/raw.c
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* [PATCH] raw: don't allow the creation of a raw device with minor number 0Jeff Moyer2007-02-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Minor number 0 (under the raw major) is reserved for the rawctl device file, which is used to query, set, and unset raw device bindings. However, the ioctl interface does not protect the user from specifying a raw device with minor number 0: $ sudo ./raw /dev/raw/raw0 /dev/VolGroup00/swap /dev/raw/raw0: bound to major 253, minor 2 $ ls -l /dev/rawctl ls: /dev/rawctl: No such file or directory $ ls -l /dev/raw/raw0 crw------- 1 root root 162, 0 Jan 12 10:51 /dev/raw/raw0 $ sudo ./raw -qa Cannot open master raw device '/dev/rawctl' (No such file or directory) As you can see, this prevents any further raw operations from succeeding. The fix (from Steve Fernandez) is quite simple--do not allow the allocation of minor number 0. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Cc: Steven Fernandez <sfernand@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] struct path: convert char-driversJosef Sipek2006-12-081-1/+1
| | | | | | Signed-off-by: Josef Sipek <jsipek@fsl.cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Driver core: convert raw device code to use struct deviceGreg Kroah-Hartman2006-12-011-6/+6
| | | | | | | | | Converts from using struct "class_device" to "struct device" making everything show up properly in /sys/devices/ with symlinks from the /sys/class directory. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Streamline generic_file_* interfaces and filemap cleanupsBadari Pulavarty2006-10-011-13/+2
| | | | | | | | | | | | | | | | | | | | | | This patch cleans up generic_file_*_read/write() interfaces. Christoph Hellwig gave me the idea for this clean ups. In a nutshell, all filesystems should set .aio_read/.aio_write methods and use do_sync_read/ do_sync_write() as their .read/.write methods. This allows us to cleanup all variants of generic_file_* routines. Final available interfaces: generic_file_aio_read() - read handler generic_file_aio_write() - write handler generic_file_aio_write_nolock() - no lock write handler __generic_file_aio_write_nolock() - internal worker routine Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Remove readv/writev methods and use aio_read/aio_write insteadBadari Pulavarty2006-10-011-2/+0
| | | | | | | | | | This patch removes readv() and writev() methods and replaces them with aio_read()/aio_write() methods. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Vectorize aio_read/aio_write fileop methodsBadari Pulavarty2006-10-011-13/+1
| | | | | | | | | | | | This patch vectorizes aio_read() and aio_write() methods to prepare for collapsing all aio & vectored operations into one interface - which is aio_read()/aio_write(). Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Michael Holzheu <HOLZHEU@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Return better error codes if drivers/char/raw.c module init failsRolf Eike Beer2006-09-291-8/+11
| | | | | | | | | | | | Currently this module just returns 1 if anything on module init fails. Store the error code of the different function calls and return their error on problems. Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> [ Fixed to not unregister twice on error ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] make more file_operation structs staticArjan van de Ven2006-07-031-3/+3
| | | | | | | | | | | | Mark the static struct file_operations in drivers/char as const. Making them const prevents accidental bugs, and moves them to the .rodata section so that they no longer do any false sharing; in addition with the proper debug option they are then protected against corruption.. [akpm@osdl.org: build fix] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] devfs: Remove the devfs_fs_kernel.h file from the treeGreg Kroah-Hartman2006-06-261-1/+0
| | | | | | Also fixes up all files that #include it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] devfs: Remove devfs_remove() function from the kernel treeGreg Kroah-Hartman2006-06-261-6/+0
| | | | | | Removes the devfs_remove() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] devfs: Remove devfs_mk_cdev() function from the kernel treeGreg Kroah-Hartman2006-06-261-8/+0
| | | | | | Removes the devfs_mk_cdev() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] sem2mutex: drivers: raw, connector, dcdbas, ppp_genericArjan van de Ven2006-03-231-11/+12
| | | | | | | | | | | | | Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Driver Core: fix up all callers of class_device_create()Greg Kroah-Hartman2005-10-281-2/+2
| | | | | | | | The previous patch adding the ability to nest struct class_device changed the paramaters to the call class_device_create(). This patch fixes up all in-kernel users of the function. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] class: convert drivers/char/* to use the new class api instead of ↵gregkh@suse.de2005-06-201-9/+9
| | | | | | class_simple Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Fix filp being passed through raw ioctl handlerStephen Tweedie2005-05-181-1/+1
| | | | | | | | | | | | | | | | | | | | | Don't pass meaningless file handles to block device ioctls. The recent raw IO ioctl-passthrough fix started passing the raw file handle into the block device ioctl handler. That's unlikely to be useful, as the file handle is actually open on a character-mode raw device, not a block device, so dereferencing it is not going to yield useful results to a block device ioctl handler. Previously we just passed NULL; also not a value that can usefully be dereferenced, but at least if it does happen, we'll oops instead of silently pretending that the file is a block device, so NULL is the more defensive option here. This patch reverts to that behaviour. Noticed by Al Viro. Signed-off-by: Stephen Tweedie <sct@redhat.com> Acked-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix root hole in raw deviceStephen Tweedie2005-05-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [Patch] Fix raw device ioctl pass-through Raw character devices are supposed to pass ioctls through to the block devices they are bound to. Unfortunately, they are using the wrong function for this: ioctl_by_bdev(), instead of blkdev_ioctl(). ioctl_by_bdev() performs a set_fs(KERNEL_DS) before calling the ioctl, redirecting the user-space buffer access to the kernel address space. This is, needless to say, a bad thing. This was noticed first on s390, where raw IO was non-functioning. The s390 driver config does not actually allow raw IO to be enabled, which was the first part of the problem. Secondly, the s390 kernel address space is distinct from user, causing legal raw ioctls to fail. I've reproduced this on a kernel built with 4G:4G split on x86, which fails in the same way (-EFAULT if the address does not exist kernel-side; returns success without actually populating the user buffer if it does.) The patch below fixes both the config and address-space problems. It's based closely on a patch by Jan Glauber <jang@de.ibm.com>, which has been tested on s390 at IBM. I've tested it on x86 4G:4G (split address space) and x86_64 (common address space). Kernel-address-space access has been assigned CAN-2005-1264. Signed-off-by: Stephen Tweedie <sct@redhat.com> Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Linux-2.6.12-rc2Linus Torvalds2005-04-161-0/+342
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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