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* [PATCH] Update Documentation/DocBook/kernel-hacking.tmplRusty Russell2005-09-09
| | | | | | | | | | | | | | | | Update the hacking guide, before CONFIG_PREEMPT_RT goes in and it needs rewriting again. Changes include modernization of quotes, removal of most references to bottom halves (some mention required because we still use bh in places to mean softirq). It would be nice to have a discussion of sparse and various annotations. Please send patches straight to akpm. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (authored) Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s3c2410fb: Platform support for ARM S3C2410 framebuffer driverArnaud Patard2005-09-09
| | | | | | | | | | | | This patch add the plateform specific stuff needed to configure and use the driver. Signed-Off-By: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Antonino Daplas <adaplas@pol.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ben Dooks <ben@trinity.fluff.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s3c2410fb: ARM S3C2410 framebuffer driverArnaud Patard2005-09-09
| | | | | | | | | | | | | | | This set of two patches add support for the framebuffer of the Samsung S3C2410 ARM SoC. This driver was started about one year ago and is now used on iPAQ h1930/h1940, Acer n30 and probably other s3c2410-based machines I'm not aware of. I've also heard yesterday that it's working also on iPAQ rx3715/rx3115 (s3c2440-based machines). Signed-Off-By: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Ben Dooks <ben@trinity.fluff.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] quiet non-x86 option ROM warningsOlaf Hering2005-09-09
| | | | | | | | | Quiet an incorrect warning in aty128fb and radeonfb about the PCI ROM content. Macs work just find without that signature. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i810fb: Stop LCD displays from flickeringAntonino A. Daplas2005-09-09
| | | | | | | | Stop LCD displays from flickering during high loads. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i810fb: Add i2c/DDC supportAntonino A. Daplas2005-09-09
| | | | | | | | | | | | | Add ddc/i2c support for i810fb. This will allow the driver to get display information, especially for monitors with fickle timings. The i2c support depends on CONFIG_FB_I810_GTF. Changed __init* to __devinit* Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Alexander Nyberg <alexn@telia.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbcon: Break up bit_putcs into its component functionsAntonino A. Daplas2005-09-09
| | | | | | | | | | | | The function bit_putcs() in drivers/video/console/bitblit.c is becoming large. Break it up into its component functions (bit_putcs_unaligned and bit_putcs_aligned). Incorporated fb_pad_aligned_buffer() optimization by Roman Zippel. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] pxafb: Add hsync time reporting hookRichard Purdie2005-09-09
| | | | | | | | | | | To solve touchscreen interference problems devices like the Sharp Zaurus SL-C3000 need to know the length of the horitzontal sync pulses. This patch adds a hook to pxafb so the touchscreen driver can function correctly. Signed-Off-By: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: Initialize var structure in calc_mode_timingsAntonino A. Daplas2005-09-09
| | | | | | | | | The var structure in calc_mode_timings is not properly initialized (zero set) which leads to undefined behavior when it is passed to fb_get_mode(). Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: Fixed mirrored characters in big endian machinesAntonino A. Daplas2005-09-09
| | | | | | | | | | nvidiafb_imageblit converts the bitdata stream from big_endian to little endian. This produces mirrored characters when machine is big_endian. Do not endian convert on big endian machines. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbcon: Stop cursor timer if console is inactiveAntonino A. Daplas2005-09-09
| | | | | | | | | If console is blanked or in KD_GRAPHICS mode, delete cursor timer. No sense flashing the cursor when there's nothing to be seen. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] savagefb: Make mode_option available when compiled as a moduleAntonino A. Daplas2005-09-09
| | | | | | | | Make "mode_option" available when compiled as a module. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: Use CVT to get mode for digital displaysAntonino A. Daplas2005-09-09
| | | | | | | | | | If no EDID block is probed, if the display is digital and if no mode option is specified by the user, get the timings by CVT instead of using the global mode database. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: Add VESA Coordinated Video Timings (CVT) supportAntonino A. Daplas2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Coordinated Video Timings (CVT) is the latest standard approved by VESA concerning video timings generation. It addresses the limitation of GTF which is designed mainly for CRT displays. CRT's have a high blanking requirement (as much as 25% of the horizontal frame length) which artificially increases the pixelclock. Digital displays, on the other hand, needs to conserve the pixelclock as much as possible. The GTF also does not take into account the different aspect ratios in its calculation. The new function added is fb_find_mode_cvt(). It is called by fb_find_mode() if it recognizes a mode option string formatted for CVT. The format is: <xres>x<yres>[M][R][-<bpp>][<at-sign><refresh>][i][m] The 'M' tells the function to calculate using CVT. On it's own, it will compute a timing for CRT displays at 60Hz. If the 'R' is specified, 'reduced blanking' computation will be used, best for flatpanels. The 'i' and the 'm' is for 'interlaced mode' and 'with margins' respectively. To determine if CVT was used, check for dmesg for something like this: CVT Mode - <pix>M<n>[-R], ie: .480M3-R (800x600 reduced blanking) where: pix - product of xres and yres, in MB M - is a CVT mode n - the aspect ratio (3 - 4:3; 4 - 5:4; 9 - 16:9, 15:9; A - 16:10) -R - reduced blanking Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] radeonfb: Only request resources we needDaniel Burcaw2005-09-09
| | | | | | | | | | | | | | | This patch changes radeon to request only resources 0 and 2 instead of all 3. This works around problems with some setups where BAR 1 (IO BAR) has not been assigned by the firmware since it's not used on the machine and the kernel fails to assign something to it due to the card being between a P2P bridge that was configured without an IO range at all. This typically fixes radeonfb on some Apple Xserve G5 machines Signed-off-by: Daniel Burcaw <dburcaw@terrasoftsolutions.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] framebuffer: bit_putcs() optimization for 8x* fontsKnut Petersen2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This trivial patch gives a performance boost to the framebuffer console Constructing the bitmaps that are given to the bitblit functions of the framebuffer drivers is time consuming. Here we avoide a call to the slow fb_pad_aligned_buffer(). The patch replaces that call with a simple but much more efficient bytewise copy. The kernel spends a significant time at this place if you use 8x* fonts. Every pixel displayed on your screen is prepared here. Some benchmark results: Displaying a file of 2000 lines with 160 characters each takes 889 ms system time using cyblafb on my system (I´m using a 1280x1024 video mode, resulting in a 160x64 character console) Displaying the same file with the enclosed patch applied to 2.6.13 only takes 760 ms system time, saving 129 ms or 14.5%. Font widths other than 8 are not affected. The advantage and correctness of this patch should be obvious. Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] framebuffer: new driver for cyberblade/i1 graphics coreKnut Petersen2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a framebuffer driver for the Cyberblade/i1 graphics core. Currently tridenfb claims to support the cyberblade/i1 graphics core. This is of very limited truth. Even vesafb is faster and provides more working modes and a much better quality of the video signal. There is a great number of bugs in tridentfb ... but most often it is impossible to decide if these bugs are real bugs or if fixing them for the cyberblade/i1 core would break support for one of the other supported chips. Tridentfb seems to be unmaintained,and documentation for most of the supported chips is not available. So "fixing" cyberblade/i1 support inside of tridentfb was not an option, it would have caused numerous if(CYBERBLADEi1) else ... cases and would have rendered the code to be almost unmaintainable. A first version of this driver was published on 2005-07-31. A fix for a bug reported by Jochen Hein was integrated as well as some changes requested by Antonino A. Daplas. A message has been added to tridentfb to inform current users of tridentfb to switch to cyblafb if the cyberblade/i1 graphics core is detected. This patch is one logical change, but because of the included documentation it is bigger than 70kb. Therefore it is not sent to lkml and linux-fbdev-devel, Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de> Cc: Muli Ben-Yehuda <mulix@mulix.org> Acked-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] better error handing in savagefb_probeOlaf Hering2005-09-09
| | | | | | | | | | | err remains uninitialized of pci_request_regions fails. Found by Thorsten Kukuk, I added a few more checks. Signed-off-by: Olaf Hering <olh@suse.de> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sisfb updateThomas Winischhofer2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This lifts sisfb from version 1.7.17 to version 1.8.9. Changes include: - Added support for XGI V3XT, V5, V8, Z7 chipsets, including POSTing of all of these chipsets. - Added support for latest SiS chipsets (761). - Added support for SiS76x memory "hybrid" mode. - Added support for new LCD resolutions (eg 1280x854, 856x480). - Fixed support for 320x240 STN panels (for embedded devices). - Fixed many HDTV modes (525p, 750p, 1080i). - Fixed PCI config register reading/writing to use proper kernel functions for this purpose. - Fixed PCI ROM handling to use the kernel's proper functions. - Removed lots of "typedef"s. - Removed lots of code which was for X.org/XFree86 only. - Fixed coding style in many places. - Removed lots of 2.4 cruft. - Reduced stack size by unifying two previously separate structs into one. - Added new hooks for memory allocation (for DRM). Now the driver can truly handle multiple cards, including memory management. - Fixed numerous minor bugs. Signed-off-by: Thomas Winischhofer <thomas@winischhofer.net> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] matroxfb: read MGA PInS data on PowerPCIan Romanick2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | This updates the matroxfb code so that it can find the PInS data embedded in the BIOS on PowerPC cards. The process for finding the data is different on OpenFirmware cards than on x86 cards, and the code for doing so was missing. After patching, building, installing, and booting a kernel, you should grep for "PInS" in /var/log/messages. You should see two messages in the log: PInS data found at offset XXXXX PInS memtype = X On the GXT135p card I get "31168" and "5". The first value is irrelevant, but it's presence lets me know that the PInS data was actually found. On a GXT130p, the second value should be 3. Since I don't have access to that hardware, if someone can verify that, I will submit a follow-on patch that rips out all the memtype parameter stuff. Signed-off-by: Ian Romanick <idr@us.ibm.com> Signed-off-by: Petr Vandrovec <vandrove@vc.cvut.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] radeonfb_old: Fix broken linkAntonino A. Daplas2005-09-09
| | | | | | | | | The link for ATI's product page in drivers/video/Kconfig for FB_RADEON is broken. Replace with a product comparison page. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] atyfb: Remove code that sets sync polarity unconditionallyAlexander Kern2005-09-09
| | | | | | | | | | | | | Currently, atyfb has code that sets the hsync and vsync polarity based on the current video mode, without letting the user override the settings. Remove this particular code. The sync polarities are set by the PROM, the user or by the videomode. Signed-off-by: Alexander Kern <alex.kern@gmx.de> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] console: Fix buffer copy on vc resizeAntonino A. Daplas2005-09-09
| | | | | | | | | | | | | | | | | | | | | | On a vc resize, the contents of the old screen buffer are transferred to the new screenbuffer. If the new screenbuffer is smaller than the old one, only the contents from the bottom are copied to new. If the contents of the old buffer are located at the top, then the contents will not be copied to the new buffer resulting in a blank screen. This bug will happen only if the vc in question is not in the foreground. Doing an fbset -a or con2fbmap will trigger this bug. To fix this problem, base the start of the copy from the location of the current cursor. If the cursor is near the top of the buffer, copy the contents at the top, and if the cursor is near the bottom of the buffer, then copy the contents at the bottom. In the unlikely case where the new row size is greater than 2x smaller than the old one, and the cursor is in the middle, copy 1/2 screenful from the top and bottom of the cursor position. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbcon: Saner 16-color to 4-color conversionAntonino A. Daplas2005-09-09
| | | | | | | | | | | | | Currently, the default linux 16-colors are converted to 4-colors by simply dividing the values by 4. However, this is not necessarily correct since the first 4 colors are converted to black, rendering them invisible. So, for black, no conversion; for light colors, convert to gray, for normal text color, no conversion, and for bright colors, convert to intense white. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: Fix greater than 1 bit monochrome color handlingAntonino A. Daplas2005-09-09
| | | | | | | | | | | Currently, fbcon assumes that the visual FB_VISUAL_MONO* is always 1 bit. According to Geert, there are old hardware where it's possible to have monochrome at 8-bit, but has only 2 colors, black - 0x00 and white - 0xff. Fix color handlers (fb_get_color_depth, and get_color) for this special case. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: Fallback to firmware EDIDAntonino A. Daplas2005-09-09
| | | | | | | | If nvidiafb fails to probe the EDID block, get the EDID from the BIOS. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] savagefb: Driver updatesAntonino A. Daplas2005-09-09
| | | | | | | | | | | | | | - Fallback to firmware EDID if chipset has no DDC/I2C support or if I2C probing failed - Add fb_blank hook - Fix savagefb_suspend/resume to enable driver to successfully suspend and resume from S3, memory or disk Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: Resurrect hooks to get EDID from firmwareAntonino A. Daplas2005-09-09
| | | | | | | | | | | | | For the i386, code is already present in video.S that gets the EDID from the video BIOS. Make this visible so drivers can also use this data as fallback when i2c does not work. To ensure that the EDID block is returned for the primary graphics adapter only, by check if the IORESOURCE_ROM_SHADOW flag is set. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: geode updatesDavid Vrabel2005-09-09
| | | | | | | | | | | | | | | | | | Geode framebuffer driver updates: - Local mode list (taken from modedb.c) containing only relevant modes. This also makes the driver work as a module. - Make it a PCI driver (from James Simmons <jsimmons@infradead.org>). - A few other minor cosmetic bits and pieces. Signed-off-by: David Vrabel <dvrabel@arcom.com> Signed-off-by: James Simmons <jsimmons@infradead.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> 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] fbdev: prevent drivers that have hardware cursors from calling ↵James Simmons2005-09-09
| | | | | | | | | | | | | software cursor code This patch removes drivers that have hardware cursors from calling the software cursor code. Also if the driver sets a no hardware cursor flag then the driver reports a error it someone attempts to use the cursor. Signed-off-by: James Simmons <jsimmons@infradead.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] vesafb: Add blanking supportAntonino A. Daplas2005-09-09
| | | | | | | | | | Add rudimentary support by manipulating the VGA registers. However, not all vesa modes are VGA compatible, so VGA compatiblity is checked first. Only 2 levels are supported, powerup and powerdown. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: Add fbset -a supportAntonino A. Daplas2005-09-09
| | | | | | | | | Add capability to fbdev to listen to the FB_ACTIVATE_ALL flag. If set, it notifies fbcon that all consoles must be set to the current var. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: fix handling of malformed 9P messagesEric Van Hensbergen2005-09-09
| | | | | | | | | | | This patch attempts to do a better job of cleaning up after detecting errors on the transport. This should also improve error reporting on broken connections to servers. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: readlink extended mode checkEric Van Hensbergen2005-09-09
| | | | | | | | | | | | LANL reported some issues with random crashes during mount of legacy protocol servers (9P2000 versus 9P2000.u) -- crash was always happening in readlink (which should never happen in legacy mode). Added some sanity conditionals to the get_inode code which should prevent the errors LANL was seeing. Code tested benign through regression. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: Fix support for special files (devices, named pipes, etc.)Eric Van Hensbergen2005-09-09
| | | | | | | | | Fix v9fs special files (block, char devices) support. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: Clean-up vfs_inode and setattr functionsEric Van Hensbergen2005-09-09
| | | | | | | | | | Cleanup code in v9fs vfs_inode as suggested by Alexey Dobriyan. Did some major revamping of the v9fs setattr code to remove unnecessary allocations and clean up some dead-code. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: Change error magic numbers to defined constantsEric Van Hensbergen2005-09-09
| | | | | | | | | Change magic error numbers to system defined constants in v9fs error.h As suggested by Jan-Benedict Glaw. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: debug and support routinesEric Van Hensbergen2005-09-09
| | | | | | | | This part of the patch contains debug and other misc routines. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: Support to force umountEric Van Hensbergen2005-09-09
| | | | | | | | | Support for force umount Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: transport modulesEric Van Hensbergen2005-09-09
| | | | | | | | | This part of the patch contains transport routines. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: 9P protocol implementationEric Van Hensbergen2005-09-09
| | | | | | | | This part of the patch contains the 9P protocol functions. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: VFS superblock operations and glueEric Van Hensbergen2005-09-09
| | | | | | | | This part of the patch contains VFS superblock and mapping code. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: VFS inode operationsEric Van Hensbergen2005-09-09
| | | | | | | | This part of the patch contains the VFS inode interfaces. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: VFS file, dentry, and directory operationsEric Van Hensbergen2005-09-09
| | | | | | | | This part of the patch contains the VFS file, dentry & directory interfaces. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] v9fs: Documentation, Makefiles, ConfigurationEric Van Hensbergen2005-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | OVERVIEW V9FS is a distributed file system for Linux which provides an implementation of the Plan 9 resource sharing protocol 9P. It can be used to share all sorts of resources: static files, synthetic file servers (such as /proc or /sys), devices, and application file servers (such as FUSE). BACKGROUND Plan 9 (http://plan9.bell-labs.com/plan9) is a research operating system and associated applications suite developed by the Computing Science Research Center of AT&T Bell Laboratories (now a part of Lucent Technologies), the same group that developed UNIX , C, and C++. Plan 9 was initially released in 1993 to universities, and then made generally available in 1995. Its core operating systems code laid the foundation for the Inferno Operating System released as a product by Lucent Bell-Labs in 1997. The Inferno venture was the only commercial embodiment of Plan 9 and is currently maintained as a product by Vita Nuova (http://www.vitanuova.com). After updated releases in 2000 and 2002, Plan 9 was open-sourced under the OSI approved Lucent Public License in 2003. The Plan 9 project was started by Ken Thompson and Rob Pike in 1985. Their intent was to explore potential solutions to some of the shortcomings of UNIX in the face of the widespread use of high-speed networks to connect machines. In UNIX, networking was an afterthought and UNIX clusters became little more than a network of stand-alone systems. Plan 9 was designed from first principles as a seamless distributed system with integrated secure network resource sharing. Applications and services were architected in such a way as to allow for implicit distribution across a cluster of systems. Configuring an environment to use remote application components or services in place of their local equivalent could be achieved with a few simple command line instructions. For the most part, application implementations operated independent of the location of their actual resources. Commercial operating systems haven't changed much in the 20 years since Plan 9 was conceived. Network and distributed systems support is provided by a patchwork of middle-ware, with an endless number of packages supplying pieces of the puzzle. Matters are complicated by the use of different complicated protocols for individual services, and separate implementations for kernel and application resources. The V9FS project (http://v9fs.sourceforge.net) is an attempt to bring Plan 9's unified approach to resource sharing to Linux and other operating systems via support for the 9P2000 resource sharing protocol. V9FS HISTORY V9FS was originally developed by Ron Minnich and Maya Gokhale at Los Alamos National Labs (LANL) in 1997. In November of 2001, Greg Watson setup a SourceForge project as a public repository for the code which supported the Linux 2.4 kernel. About a year ago, I picked up the initial attempt Ron Minnich had made to provide 2.6 support and got the code integrated into a 2.6.5 kernel. I then went through a line-for-line re-write attempting to clean-up the code while more closely following the Linux Kernel style guidelines. I co-authored a paper with Ron Minnich on the V9FS Linux support including performance comparisons to NFSv3 using Bonnie and PostMark - this paper appeared at the USENIX/FREENIX 2005 conference in April 2005: ( http://www.usenix.org/events/usenix05/tech/freenix/hensbergen.html ). CALL FOR PARTICIPATION/REQUEST FOR COMMENTS Our 2.6 kernel support is stabilizing and we'd like to begin pursuing its integration into the official kernel tree. We would appreciate any review, comments, critiques, and additions from this community and are actively seeking people to join our project and help us produce something that would be acceptable and useful to the Linux community. STATUS The code is reasonably stable, although there are no doubt corner cases our regression tests haven't discovered yet. It is in regular use by several of the developers and has been tested on x86 and PowerPC (32-bit and 64-bit) in both small and large (LANL cluster) deployments. Our current regression tests include fsx, bonnie, and postmark. It was our intention to keep things as simple as possible for this release -- trying to focus on correctness within the core of the protocol support versus a rich set of features. For example: a more complete security model and cache layer are in the road map, but excluded from this release. Additionally, we have removed support for mmap operations at Al Viro's request. PERFORMANCE Detailed performance numbers and analysis are included in the FREENIX paper, but we show comparable performance to NFSv3 for large file operations based on the Bonnie benchmark, and superior performance for many small file operations based on the PostMark benchmark. Somewhat preliminary graphs (from the FREENIX paper) are available (http://v9fs.sourceforge.net/perf/index.html). RESOURCES The source code is available in a few different forms: tarballs: http://v9fs.sf.net CVSweb: http://cvs.sourceforge.net/viewcvs.py/v9fs/linux-9p/ CVS: :pserver:anonymous@cvs.sourceforge.net:/cvsroot/v9fs/linux-9p Git: rsync://v9fs.graverobber.org/v9fs (webgit: http://v9fs.graverobber.org) 9P: tcp!v9fs.graverobber.org!6564 The user-level server is available from either the Plan 9 distribution or from http://v9fs.sf.net Other support applications are still being developed, but preliminary version can be downloaded from sourceforge. Documentation on the protocol has historically been the Plan 9 Man pages (http://plan9.bell-labs.com/sys/man/5/INDEX.html), but there is an effort under way to write a more complete Internet-Draft style specification (http://v9fs.sf.net/rfc). There are a couple of mailing lists supporting v9fs, but the most used is v9fs-developer@lists.sourceforge.net -- please direct/cc your comments there so the other v9fs contibutors can participate in the conversation. There is also an IRC channel: irc://freenode.net/#v9fs This part of the patch contains Documentation, Makefiles, and configuration file changes. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] files: files locking docDipankar Sarma2005-09-09
| | | | | | | | Add documentation describing the new locking scheme for file descriptor table. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] files: lock-free fd look-upDipankar Sarma2005-09-09
| | | | | | | | | | | | With the use of RCU in files structure, the look-up of files using fds can now be lock-free. The lookup is protected by rcu_read_lock()/rcu_read_unlock(). This patch changes the readers to use lock-free lookup. Signed-off-by: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by: Ravikiran Thirumalai <kiran_th@gmail.com> Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] files: files struct with RCUDipankar Sarma2005-09-09
| | | | | | | | | | | | | | | | | | | | | Patch to eliminate struct files_struct.file_lock spinlock on the reader side and use rcu refcounting rcuref_xxx api for the f_count refcounter. The updates to the fdtable are done by allocating a new fdtable structure and setting files->fdt to point to the new structure. The fdtable structure is protected by RCU thereby allowing lock-free lookup. For fd arrays/sets that are vmalloced, we use keventd to free them since RCU callbacks can't sleep. A global list of fdtable to be freed is not scalable, so we use a per-cpu list. If keventd is already handling the current cpu's work, we use a timer to defer queueing of that work. Since the last publication, this patch has been re-written to avoid using explicit memory barriers and use rcu_assign_pointer(), rcu_dereference() premitives instead. This required that the fd information is kept in a separate structure (fdtable) and updated atomically. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] files-sparc64-fix 2Dipankar Sarma2005-09-09
| | | | | | | | | Fix sparc64 timod to use the new files_fdtable() api to get the fd table. This is necessary for RCUification. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] files: break up files structDipankar Sarma2005-09-09
| | | | | | | | | | | | | | | In order for the RCU to work, the file table array, sets and their sizes must be updated atomically. Instead of ensuring this through too many memory barriers, we put the arrays and their sizes in a separate structure. This patch takes the first step of putting the file table elements in a separate structure fdtable that is embedded withing files_struct. It also changes all the users to refer to the file table using files_fdtable() macro. Subsequent applciation of RCU becomes easier after this. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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