aboutsummaryrefslogtreecommitdiffstats
Commit message (Collapse)AuthorAge
* Remove "must_check" attributes in PCI-landLinus Torvalds2005-09-09
| | | | | | | | Don't just irritate all other kernel developers. Fix the users first, then you can re-introduce the must-check infrastructure to avoid new cases creeping in. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Preempt-safe RCU file usageLinus Torvalds2005-09-09
| | | | Fix up fs/compat.c fixes.
* [PATCH] Update PCI IOMEM allocation startDaniel Ritz2005-09-09
| | | | | | | | | | | | | | | | | | | | | This fixes the problem with "Averatec 6240 pcmcia_socket0: unable to apply power", which was due to the CardBus IOMEM register region being allocated at an address that was actually inside the RAM window that had been reserved for video frame-buffers in an UMA setup. The BIOS _should_ have marked that region reserved in the e820 memory descriptor tables, but did not. It is fixed by rounding up the default starting address of PCI memory allocations, so that we leave a bigger gap after the final known memory location. The amount of rounding depends on how big the unused memory gap is that we can allocate IOMEM from. Based on example code by Linus. Acked-by: Greg KH <greg@kroah.com> Acked-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 Linus Torvalds2005-09-09
|\
| * [PATCH] PCI: Small rearrangement of PCI probing codePaul Mackerras2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | This patch makes some small rearrangements of the PCI probing code in order to make it possible for arch code to set up the PCI tree without needing to duplicate code from the PCI layer unnecessarily. PPC64 will use this to set up the PCI tree from the Open Firmware device tree, which we need to do on logically-partitioned pSeries systems. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] PCI: Unhide SMBus on Compaq Evo N620cRumen Ivanov Zarev2005-09-09
| | | | | | | | | | | | | | | | Trivial patch against 2.6.13 to unhide SMBus on Compaq Evo N620c laptop using Intel 82855PM chipset. Signed-off-by: Rumen Zarev <rzarev@caltech.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] PCI: Fix PCI bus mastering enable problem in pciehpRajesh Shah2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Martin Franc reported that the pciehp driver was not enabling bus master capability on his hot-plugged card. pciehprm_enable_card() was updating the PCI command register only if _HPP indicated a value for SERR or PERR that was different from the current setting. I don't have hardware that reproduces this problem, but Martin reports that this patch fixes the problem for him. Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> From rzarev@its.caltech.edu Tue Sep 6 18:29:50 2005 Date: Tue, 6 Sep 2005 13:39:32 -0700 (PDT) From: Rumen Ivanov Zarev <rzarev@its.caltech.edu> Message-Id: <200509062039.j86KdWMr014934@inky.its.caltech.edu> To: gregkh@suse.de Subject: PCI: Unhide SMBus on Compaq Evo N620c Cc: linux-kernel@vger.kernel.org Trivial patch against 2.6.13 to unhide SMBus on Compaq Evo N620c laptop using Intel 82855PM chipset. Signed-off-by: Rumen Zarev <rzarev@caltech.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/pci/quirks.c | 6 ++++++ 1 file changed, 6 insertions(+) --- gregkh-2.6.orig/drivers/pci/quirks.c 2005-09-09 10:28:55.000000000 -0700 +++ gregkh-2.6/drivers/pci/quirks.c 2005-09-09 13:51:44.000000000 -0700 @@ -876,6 +876,12 @@ static void __init asus_hides_smbus_host case 0xC00C: /* Samsung P35 notebook */ asus_hides_smbus = 1; } + } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ)) { + if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB) + switch(dev->subsystem_device) { + case 0x0058: /* Compaq Evo N620c */ + asus_hides_smbus = 1; + } } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845_HB, asus_hides_smbus_hostbridge );
| * [PATCH] must_check attributes for PCI layer.Dave Jones2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | Self explanatory really. Some newer gcc's print a warning if a function is used and we don't check its result. We do this for a bunch of things in the kernel already, this extends that to the PCI layer. Based on a patch originally from Arjan van de Ven. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] PCI: move pci core to use add_hotplug_env_var()Greg Kroah-Hartman2005-09-09
| | | | | | | | | | | | | | | | This fixes a bug in the environment variables for all PCI device hotplug calls. Thanks to Kay Sievers for pointing out the problem. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | Fix up lost patch in compat_sys_select() for new RCU files world orderLinus Torvalds2005-09-09
| | | | | | | | | | | | | | Andrew lost this in patch reject resolution, and never noticed, since the compat code isn't in use on x86. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Linus Torvalds2005-09-09
|\ \
| * | [IPV4] fib_trie: fix proc interfaceStephen Hemminger2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create one iterator for walking over FIB trie, and use it for all the /proc functions. Add a /proc/net/route output for backwards compatibility with old applications. Make initialization of fib_trie same as fib_hash so no #ifdef is needed in af_inet.c Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=5209 Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | Merge master.kernel.org:/pub/scm/linux/kernel/git/acme/net-2.6 David S. Miller2005-09-09
| |\ \
| | * | [CCID3] Introduce ccid3_hc_[rt]x_sk() for overal consistencyArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] Introduce dccp_timestampArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To start the timestamps with 0.0ms, easing the integer maths in the CCIDs, this probably will be reworked to use the to be introduced struct timeval_offset infrastructure out of skb_get_timestamp, etc. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [CCID3] Initialize more fields in ccid3_hc_rx_initArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The initialization of ccid3hcrx_rtt to 5ms is just a bandaid, I'll continue auditing the CCID3 HC rx codebase to fix this properly, probably I'll add a feedback timer as suggested in the CCID3 draft. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [CCID3] Make the ccid3hcrx_rtt calc look more like the ccid3hctx_rtt oneArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [CCID3] Use ELAPSED_TIME in the HC TX RTT estimationArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] Give precedence to the biggest ELAPSED_TIMEArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We can get this value in an TIMESTAMP_ECHO and/or in an ELAPSED_TIME option, if receiving both give precendence to the biggest one. In my tests they are very close if not equal at all times, so we may well think about removing the code in CCID3 that inserts this option and leaving this to the core, and perhaps even use just TIMESTAMP_ECHO including the elapsed time. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [CCID3] Calculate ccid3hcrx_x_recv using usecs_divArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [CCID] Only call the HC insert_options methods when requestedArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [CCID3] Avoid unsigned integer overflows in usecs_divArnaldo Carvalho de Melo2005-09-09
| | | | | | | | | | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
* | | | [PATCH] Lost sockfd_put() in routing_ioctl()Kirill Korotaev2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds lost sockfd_put() in 32bit compat rounting_ioctl() on 64bit platforms Signed-Off-By: Kirill Korotaev <dev@sw.ru> Signed-Off-By: Maxim Giryaev <gem@sw.ru> Signed-off-By: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] lost fput in 32bit ioctl on x86-64Kirill Korotaev2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds a lost fput in 32bit tiocgdev ioctl on x86-64 [ chrisw: Updated to use fget_light/fput_light ] Signed-Off-By: Kirill Korotaev <dev@sw.ru> Signed-Off-By: Maxim Giryaev <gem@sw.ru> Signed-off-by: Chris Wright <chrisw@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] trivial iomem annotations in qla2xxx/qla_dbg.cviro@ZenIV.linux.org.uk2005-09-09
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] trivial __user annotations (md)viro@ZenIV.linux.org.uk2005-09-09
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] trivial __user annotations (evdev)viro@ZenIV.linux.org.uk2005-09-09
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] trivial __user cleanup (video1394)viro@ZenIV.linux.org.uk2005-09-09
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] trivial __user annotations (ipmi)viro@ZenIV.linux.org.uk2005-09-09
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] more SPIN_LOCK_UNLOCKED -> DEFINE_SPINLOCK conversionsIngo Molnar2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This converts the final 20 DEFINE_SPINLOCK holdouts. (another 580 places are already using DEFINE_SPINLOCK). Build tested on x86. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] timer initialization cleanup: DEFINE_TIMERIngo Molnar2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up timer initialization by introducing DEFINE_TIMER a'la DEFINE_SPINLOCK. Build and boot-tested on x86. A similar patch has been been in the -RT tree for some time. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE: don't allow restarting of system callsMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes ability to interrupt and restart operations while there hasn't been any side-effect. The reason: applications. There are some apps it seems that generate signals at a fast rate. This means, that if the operation cannot make enough progress between two signals, it will be restarted for ever. This bug actually manifested itself with 'krusader' trying to open a file for writing under sshfs. Thanks to Eduard Czimbalmos for the report. The problem can be solved just by making open() uninterruptible, because in this case it was the truncate operation that slowed down the progress. But it's better to solve this by simply not allowing interrupts at all (except SIGKILL), because applications don't expect file operations to be interruptible anyway. As an added bonus the code is simplified somewhat. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE: add fsync operation for directoriesMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a new FSYNCDIR request, which is sent when fsync is called on directories. This operation is available in libfuse 2.3-pre1 or greater. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] fuse: don't update file timesMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't change mtime/ctime/atime to local time on read/write. Rather invalidate file attributes, so next stat() will force a GETATTR call. Bug reported by Ben Grimm. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] fuse: more flexible cachingMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make data caching behavior selectable on a per-open basis instead of per-mount. Compatibility for the old mount options 'kernel_cache' and 'direct_io' is retained in the userspace library (version 2.4.0-pre1 or later). Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] fuse: transfer readdir data through deviceMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes a long lasting "hack" in FUSE, which used a separate channel (a file descriptor refering to a disk-file) to transfer directory contents from userspace to the kernel. The patch adds three new operations (OPENDIR, READDIR, RELEASEDIR), which have semantics and implementation exactly maching the respective file operations (OPEN, READ, RELEASE). This simplifies the directory reading code. Also disk space is not necessary, which can be important in embedded systems. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - direct I/OMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for the "direct_io" mount option of FUSE. When this mount option is specified, the page cache is bypassed for read and write operations. This is useful for example, if the filesystem doesn't know the size of files before reading them, or when any kind of caching is harmful. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] fuse: stricter mount option checkingMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for the presence of all mandatory mount options. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE: tighten check for processes allowed accessMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch tightens the check for allowing processes to access non-privileged mounts. The rational is that the filesystem implementation can control the behavior or get otherwise unavailable information of the filesystem user. If the filesystem user process has the same uid, gid, and is not suid or sgid application, then access is safe. Otherwise access is not allowed unless the "allow_other" mount option is given (for which policy is controlled by the userspace mount utility). Thanks to everyone linux-fsdevel, especially Martin Mares who helped uncover problems with the previous approach. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - readpages operationMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds readpages support to FUSE. With the help of the readpages() operation multiple reads are bundled together and sent as a single request to userspace. This can improve reading performace. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE: add paddingMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add padding to structures to make sizes the same on 32bit and 64bit archs. Initial testing and test machine generously provided by Franco Broi. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - extended attribute operationsMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the extended attribute operations to FUSE. The following operations are added: o getxattr o setxattr o listxattr o removexattr Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - mount optionsMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds miscellaneous mount options to the FUSE filesystem. The following mount options are added: o default_permissions: check permissions with generic_permission() o allow_other: allow other users to access files o allow_root: allow root to access files o kernel_cache: don't invalidate page cache on open Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - file operationsMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the file operations of FUSE. The following operations are added: o open o flush o release o fsync o readpage o commit_write Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - read-write operationsMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the write filesystem operations of FUSE. The following operations are added: o setattr o symlink o mknod o mkdir o create o unlink o rmdir o rename o link Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - read-only operationsMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the read-only filesystem operations of FUSE. This contains the following files: o dir.c - directory, symlink and file-inode operations The following operations are added: o lookup o getattr o readlink o follow_link o directory open o readdir o directory release o permission o dentry revalidate o statfs Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - device functionsMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the FUSE device handling functions. This contains the following files: o dev.c - fuse device operations (read, write, release, poll) - registers misc device - support for sending requests to userspace Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - coreMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds FUSE core. This contains the following files: o inode.c - superblock operations (alloc_inode, destroy_inode, read_inode, clear_inode, put_super, show_options) - registers FUSE filesystem o fuse_i.h - private header file Requirements ============ The most important difference between orinary filesystems and FUSE is the fact, that the filesystem data/metadata is provided by a userspace process run with the privileges of the mount "owner" instead of the kernel, or some remote entity usually running with elevated privileges. The security implication of this is that a non-privileged user must not be able to use this capability to compromise the system. Obvious requirements arising from this are: - mount owner should not be able to get elevated privileges with the help of the mounted filesystem - mount owner should not be able to induce undesired behavior in other users' or the super user's processes - mount owner should not get illegitimate access to information from other users' and the super user's processes These are currently ensured with the following constraints: 1) mount is only allowed to directory or file which the mount owner can modify without limitation (write access + no sticky bit for directories) 2) nosuid,nodev mount options are forced 3) any process running with fsuid different from the owner is denied all access to the filesystem 1) and 2) are ensured by the "fusermount" mount utility which is a setuid root application doing the actual mount operation. 3) is ensured by a check in the permission() method in kernel I started thinking about doing 3) in a different way because Christoph H. made a big deal out of it, saying that FUSE is unacceptable into mainline in this form. The suggested use of private namespaces would be OK, but in their current form have many limitations that make their use impractical (as discussed in this thread). Suggested improvements that would address these limitations: - implement shared subtrees - allow a process to join an existing namespace (make namespaces first-class objects) - implement the namespace creation/joining in a PAM module With all that in place the check of owner against current->fsuid may be removed from the FUSE kernel module, without compromising the security requirements. Suid programs still interesting questions, since they get access even to the private namespace causing some information leak (exact order/timing of filesystem operations performed), giving some ptrace-like capabilities to unprivileged users. BTW this problem is not strictly limited to the namespace approach, since suid programs setting fsuid and accessing users' files will succeed with the current approach too. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] FUSE - MAINTAINERS, Kconfig and Makefile changesMiklos Szeredi2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds FUSE filesystem to MAINTAINERS, fs/Kconfig and fs/Makefile. Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | [PATCH] Documentation/sparse snapshot URLBen Dooks2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The URL for Documentation/sparse is wrong now that it is in git. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 15:22:19 -0500