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2019-10-07fat: work around race with userspace's read via blockdev while mountingOGAWA Hirofumi
[ Upstream commit 07bfa4415ab607e459b69bd86aa7e7602ce10b4f ] If userspace reads the buffer via blockdev while mounting, sb_getblk()+modify can race with buffer read via blockdev. For example, FS userspace bh = sb_getblk() modify bh->b_data read ll_rw_block(bh) fill bh->b_data by on-disk data /* lost modified data by FS */ set_buffer_uptodate(bh) set_buffer_uptodate(bh) Userspace should not use the blockdev while mounting though, the udev seems to be already doing this. Although I think the udev should try to avoid this, workaround the race by small overhead. Link: http://lkml.kernel.org/r/87pnk7l3sw.fsf_-_@mail.parknet.co.jp Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reported-by: Jan Stancek <jstancek@redhat.com> Tested-by: Jan Stancek <jstancek@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
2018-08-22fat: propagate 64-bit inode timestampsArnd Bergmann
Now that we pass down 64-bit timestamps from VFS, we just need to convert that correctly into on-disk timestamps. To make that work correctly, this changes the last use of time_to_tm() in the kernel to time64_to_tm(), which also lets use remove that deprecated interfaces. Similarly, the time_t use in fat_time_fat2unix() truncates the timestamp on the way in, which can be avoided by using types that are wide enough to hold the intermediate values during the conversion. [hirofumi@mail.parknet.co.jp: remove useless temporary variable, needless long long] Link: http://lkml.kernel.org/r/20180619153646.3637529-1-arnd@arndb.de Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Jeff Layton <jlayton@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-01-29fat: convert to new i_version APIJeff Layton
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2017-11-17fat: remove redundant assignment of 0 to slotsColin Ian King
The variable slots is being assigned a value of zero that is never read, slots is being updated again a few lines later. Remove this redundant assignment. Cleans clang warning: Value stored to 'slots' is never read Link: http://lkml.kernel.org/r/20171017140258.22536-1-colin.king@canonical.com Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-27fs: Replace CURRENT_TIME_SEC with current_time() for inode timestampsDeepa Dinamani
CURRENT_TIME_SEC is not y2038 safe. current_time() will be transitioned to use 64 bit time along with vfs in a separate patch. There is no plan to transistion CURRENT_TIME_SEC to use y2038 safe time interfaces. current_time() will also be extended to use superblock range checking parameters when range checking is introduced. This works because alloc_super() fills in the the s_time_gran in super block to NSEC_PER_SEC. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-09fat: switch to ->iterate_shared()Al Viro
... and make that weird ioctl lock directory only shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-01-22wrappers for ->i_mutex accessAl Viro
parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested}, inode_foo(inode) being mutex_foo(&inode->i_mutex). Please, use those for access to ->i_mutex; over the coming cycle ->i_mutex will become rwsem, with ->lookup() done with it held only shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-01-20fat: permit to return phy block number by fibmap in fallocated regionNamjae Jeon
Make the fibmap call return the proper physical block number for any offset request in the fallocated range. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-20fat: fix fake_offset handling on error pathOGAWA Hirofumi
For the root directory, . and .. are faked (using dir_emit_dots()) and ctx->pos is reset from 2 to 0. A corrupted root directory could cause fat_get_entry() to fail, but ->iterate() (fat_readdir()) reports progress to the VFS (with ctx->pos rewound to 0), so any following calls to ->iterate() continue to return the same entries again and again. The result is that userspace will never see the end of the directory, causing e.g. 'ls' to hang in a getdents() loop. [hirofumi@mail.parknet.co.jp: cleanup and make sure to correct fake_offset] Reported-by: Vegard Nossum <vegard.nossum@oracle.com> Tested-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Richard Weinberger <richard.weinberger@gmail.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-17fs/fat: remove unnecessary includesAlexander Kuleshov
'fat.h' includes <linux/buffer_head.h> which includes <linux/fs.h> which includes all the header files required for all *.c files fat filesystem. [akpm@linux-foundation.org: fs/fat/iode.c needs seq_file.h] [sfr@canb.auug.org.au: put one actually necessary include file back] Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-31vfs: make first argument of dir_context.actor typedMiklos Szeredi
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert fatfsAl Viro
... pox upon the idiotic ioctls; life would be much easier without those. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-29fat (exportfs): rebuild directory-inode if fat_dget()Namjae Jeon
This patch enables rebuilding of directory inodes which are not present in the cache.This is done by traversing the disk clusters to find the directory entry of the parent directory and using its i_pos to build the inode. The traversal is done by fat_scan_logstart() which is similar to fat_scan() but matches i_pos values instead of names.fat_scan_logstart() needs an inode parameter to work, for which a dummy inode is created by it's caller fat_rebuild_parent(). This dummy inode is destroyed after the traversal completes. All this is done only if the nostale_ro nfs mount option is specified. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ravishankar N <ravi.n1@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-22new helper: file_inode(file)Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-12-20fat: fix incorrect function commentRavishankar N
fat_search_long() returns 0 on success, -ENOENT/ENOMEM on failure. Change the function comment accordingly. While at it, fix some trivial typos. Signed-off-by: Ravishankar N <cyberax82@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-09fat: drop lock/unlock superMarco Stornelli
Removed lock/unlock super. Added a new private s_lock mutex. Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-06fs/fat: fix all other checkpatch issues in dir.cCruz Julian Bishop
1: Import linux/uaccess.h instead of asm.uaccess.h 2: Stop any lines going over 80 characters 3: Stopped setting any variables in if statements 4: Stopped splitting quoted strings 5: Removed unneeded parentheses Signed-off-by: Cruz Julian Bishop <cruzjbishop@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-06fs/fat: fix some small checkpatch issues in dir.cCruz Julian Bishop
Simply remove the spacing between function definitions and EXPORT_SYMBOL_GPL calls, which were previously generating warnings. Signed-off-by: Cruz Julian Bishop <cruzjbishop@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-06fat (exportfs): fix dentry reconnectionSteven J. Magnani
Maintain an index of directory inodes by starting cluster, so that fat_get_parent() can return the proper cached inode rather than inventing one that cannot be traced back to the filesystem root. Add a new msdos/vfat binary mount option "nfs" so that FAT filesystems that are _not_ exported via NFS are not saddled with maintenance of an index they will never use. Finally, simplify NFS file handle generation and lookups. An ext2-congruent implementation is adequate for FAT needs. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-06fat: use accessor function for msdos_dir_entry 'start'Namjae Jeon
Use accessor function for msdos_dir_entry 'start' Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Amit Sahrawat <amit.sahrawat83@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-30fat: refactor shortname parsingSteven J. Magnani
Nearly identical shortname parsing is performed in fat_search_long() and __fat_readdir(). Extract this code into a function that may be called by both. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-05-31fat: use fat_msg_ratelimit() in fat__get_entry()Namjae Jeon
If an application tries to lookup (opendir/readdir/stat) 5000 files on a fatfs USB device and the device is unplugged, many message occur, shown below. This makes the application slow. So use the new fat_msg_ratelimit() decrease the messaging rate. #> ./file_lookup_testcase ./files_directory/ usb 2-1.4: USB disconnect, device number 4 FAT-fs (sda1): FAT read failed (blocknr 2631) FAT-fs (sda1): Directory bread(block 396816) failed FAT-fs (sda1): Directory bread(block 396817) failed FAT-fs (sda1): Directory bread(block 396818) failed FAT-fs (sda1): Directory bread(block 396819) failed FAT-fs (sda1): Directory bread(block 396820) failed FAT-fs (sda1): Directory bread(block 396821) failed FAT-fs (sda1): Directory bread(block 396822) failed FAT-fs (sda1): Directory bread(block 396823) failed FAT-fs (sda1): Directory bread(block 406824) failed FAT-fs (sda1): Directory bread(block 406825) failed FAT-fs (sda1): Directory bread(block 406826) failed FAT-fs (sda1): Directory bread(block 406827) failed FAT-fs (sda1): Directory bread(block 406828) failed FAT-fs (sda1): Directory bread(block 406829) failed FAT-fs (sda1): Directory bread(block 406830) failed FAT-fs (sda1): Directory bread(block 406831) failed FAT-fs (sda1): Directory bread(block 417696) failed FAT-fs (sda1): Directory bread(block 417697) failed FAT-fs (sda1): Directory bread(block 417698) failed FAT-fs (sda1): Directory bread(block 417699) failed FAT-fs (sda1): Directory bread(block 417700) failed FAT-fs (sda1): Directory bread(block 417701) failed FAT-fs (sda1): Directory bread(block 417702) failed FAT-fs (sda1): Directory bread(block 417703) failed FAT-fs (sda1): FAT read failed (blocknr 2631) FAT-fs (sda1): Directory bread(block 396816) failed FAT-fs (sda1): Directory bread(block 396817) failed FAT-fs (sda1): Directory bread(block 396818) failed FAT-fs (sda1): Directory bread(block 396819) failed FAT-fs (sda1): Directory bread(block 396820) failed FAT-fs (sda1): Directory bread(block 396821) failed Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Amit Sahrawat <amit.sahrawat83@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-10-31fat: follow rename pack_hex_byte() to hex_byte_pack()Andy Shevchenko
There is no functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-17fat: fix build warningJonas Aberg
This fixes a compile warning (unititialized variable) in the fat filesystem code. Signed-off-by: Jonas Aberg <jonas.aberg@stericsson.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
2011-04-12fat: Replace all printk with fat_msg()Alexey Fisher
Replace all printk with fat_msg() Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
2010-05-17fat: convert to unlocked_ioctlArnd Bergmann
FAT does not require the BKL in its ioctl function, which is already serialized through a mutex. Since we're already touching the ioctl code, also fix the missing handling of FAT_IOCTL_GET_ATTRIBUTES in the compat code. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
2010-03-16fat: use pack_hex_byte() instead of custom oneAndy Shevchenko
Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
2009-07-12headers: smp_lock.h reduxAlexey Dobriyan
* Remove smp_lock.h from files which don't need it (including some headers!) * Add smp_lock.h to files which do need it * Make smp_lock.h include conditional in hardirq.h It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT This will make hardirq.h inclusion cheaper for every PREEMPT=n config (which includes allmodconfig/allyesconfig, BTW) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (143 commits) USB: xhci depends on PCI. USB: xhci: Add Makefile, MAINTAINERS, and Kconfig entries. USB: xhci: Respect critical sections. USB: xHCI: Fix interrupt moderation. USB: xhci: Remove packed attribute from structures. usb; xhci: Fix TRB offset calculations. USB: xhci: replace if-elseif-else with switch-case USB: xhci: Make xhci-mem.c include linux/dmapool.h USB: xhci: drop spinlock in xhci_urb_enqueue() error path. USB: Change names of SuperSpeed ep companion descriptor structs. USB: xhci: Avoid compiler reordering in Link TRB giveback. USB: xhci: Clean up xhci_irq() function. USB: xhci: Avoid global namespace pollution. USB: xhci: Fix Link TRB handoff bit twiddling. USB: xhci: Fix register write order. USB: xhci: fix some compiler warnings in xhci.h USB: xhci: fix lots of compiler warnings. USB: xhci: use xhci_handle_event instead of handle_event USB: xhci: URB cancellation support. USB: xhci: Scatter gather list support for bulk transfers. ...
2009-06-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6: fat: split fat_generic_ioctl FAT: add 'errors' mount option
2009-06-15NLS: update handling of UnicodeAlan Stern
This patch (as1239) updates the kernel's treatment of Unicode. The character-set conversion routines are well behind the current state of the Unicode specification: They don't recognize the existence of code points beyond plane 0 or of surrogate pairs in the UTF-16 encoding. The old wchar_t 16-bit type is retained because it's still used in lots of places. This shouldn't cause any new problems; if a conversion now results in an invalid 16-bit code then before it must have yielded an undefined code. Difficult-to-read names like "utf_mbstowcs" are replaced with more transparent names like "utf8s_to_utf16s" and the ordering of the parameters is rationalized (buffer lengths come immediate after the pointers they refer to, and the inputs precede the outputs). Fortunately the low-level conversion routines are used in only a few places; the interfaces to the higher-level uni2char and char2uni methods have been left unchanged. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-11Sanitize ->fsync() for FATAl Viro
* mark directory data blocks as assoc. metadata * add new inode to deal with FAT, mark FAT blocks as assoc. metadata of that * now ->fsync() is trivial both for files and directories Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-04FAT: add 'errors' mount optionDenis Karpov
On severe errors FAT remounts itself in read-only mode. Allow to specify FAT fs desired behavior through 'errors' mount option: panic, continue or remount read-only. `mount -t [fat|vfat] -o errors=[panic,remount-ro,continue] \ <bdev> <mount point>` This is analog to ext2 fs 'errors' mount option. Signed-off-by: Denis Karpov <ext-denis.2.karpov@nokia.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
2008-11-12fat: fix duplicate addition of ->llseek handlerOGAWA Hirofumi
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
2008-11-06fat: i_blocks warning fixOGAWA Hirofumi
blkcnt_t type depends on CONFIG_LSF. Use unsigned long long always for printk(). But lazy to type it, so add "llu" and use it. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-06fat: mmu_private race fixOGAWA Hirofumi
mmu_private is 64bits value, hence it's not atomic to update. So, the access rule for mmu_private is we must hold ->i_mutex. But, fat_get_block() path doesn't follow the rule on non-allocation path. This fixes by using i_size instead if non-allocation path. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-06fat: cleanup fat_parse_long() error handlingDarren Jenkins
Coverity CID 2332 & 2333 RESOURCE_LEAK In fat_search_long() if fat_parse_long() returns a -ve value we return without first freeing unicode. This patch free's them on this error path. The above was false positive on current tree, but this change is more clean, so apply as cleanup. [hirofumi@mail.parknet.co.jp: fix coding style] Signed-off-by: Darren Jenkins <darrenrjenkins@gmail.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-06fat: use generic_file_llseek() for directoryOGAWA Hirofumi
Since fat_dir_ioctl() was already fixed (i.e. called under ->i_mutex), and __fat_readdir() doesn't take BKL anymore. So, BKL for ->llseek() is pointless, and we have to use generic_file_llseek(). Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-06fat: Fix and cleanup timestamp conversionOGAWA Hirofumi
This cleans date_dos2unix()/fat_date_unix2dos() up. New code should be much more readable. And this fixes those old functions. Those doesn't handle 2100 correctly. 2100 isn't leap year, but old one handles it as leap year. Also, with this, centi sec is handled and is fixed. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-06fat: split include/msdos_fs.hOGAWA Hirofumi
This splits __KERNEL__ stuff in include/msdos_fs.h into fs/fat/fat.h. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-23[PATCH] fix ->llseek for more directoriesChristoph Hellwig
With this patch all directory fops instances that have a readdir that doesn't take the BKL are switched to generic_file_llseek. Signed-off-by: Christoph Hellwig <hch@lst.de>
2008-07-25fatfs: add UTC timestamp optionJoe Peterson
Provide a new mount option ("tz=UTC") for DOS (vfat/msdos) filesystems, allowing timestamps to be in coordinated universal time (UTC) rather than local time in applications where doing this is advantageous. In particular, portable devices that use fat/vfat (such as digital cameras) can benefit from using UTC in their internal clocks, thus avoiding daylight saving time errors and general time ambiguity issues. The user of the device does not have to worry about changing the time when moving from place or when daylight saving changes. The new mount option, when set, disables the counter-adjustment that Linux currently makes to FAT timestamp info in anticipation of the normal userspace time zone correction. When used in this new mode, all daylight saving time and time zone handling is done in userspace as is normal for many other filesystems (like ext3). The default mode, which remains unchanged, is still appropriate when mounting volumes written in Windows (because of its use of local time). I originally based this patch on one submitted last year by Paul Collins, but I updated it to work with current source and changed variable/option naming. Ogawa Hirofumi (who maintains these filesystems) and I discussed this patch at length on lkml, and he suggested using the option name in the attached version of the patch. Barry Bouwsma pointed out a good addition to the patch as well. Signed-off-by: Joe Peterson <joe@skyrush.com> Signed-off-by: Paul Collins <paul@ondioline.org> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Barry Bouwsma <free_beer_for_all@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-25fat: small optimization to __fat_readdir()OGAWA Hirofumi
This removes unnecessary parsing for directory entries. If short_only, we don't need to parse longname. And if !both and it found the longname, we don't need shortname. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-25fat: use same logic in fat_search_long() and __fat_readdir()OGAWA Hirofumi
This uses uses stack for shortname, and uses __getname() for longname in fat_search_long() and __fat_readdir(). By this, it removes unneeded __getname() for shortname. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-25fat: cleanup fs/fat/dir.cOGAWA Hirofumi
This is no logic changes, just cleans fs/fat/dir.c up. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-25fat/dir.c: switch to struct __fat_direntAdrian Bunk
struct __fat_dirent is what was formerly the kernel struct dirent (that was different from the userspace struct dirent). Converting all fat users to struct __fat_dirent will allow us to get rid of the conflicting struct dirent definition. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-20Replace BKL with superblock lock in fat/msdos/vfatLinus Torvalds
This replaces the use of the BKL in the FAT family of filesystems with the existing superblock lock instead. The code already appears to do mostly proper locking with its own private spinlocks (and mutexes), but while the BKL could possibly have been dropped entirely, converting it to use the superblock lock (which is just a regular mutex) is the conservative thing to do. As a per-filesystem mutex, it not only won't have any of the possible latency issues related to the BKL, but the lock is obviously private to the particular filesystem instance and will thus not cause problems for entirely unrelated users like the BKL can. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2008-04-28fat: use __getname()OGAWA Hirofumi
__getname() is faster than __get_free_page(). Use it. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-28vfat: bug fix for vfat cannot handle filename with 255Keith Mok
This patch fix the problem that the buffer allocated for convert of unicode to utf8 in fat/dir.c is too small. And cannot handle filename with 255 asian characters when mounted with utf8 options. Also it fix the filename length limitation checking in vfat/namei.c that the filename length should be checked against the number of converted unicode characters. Not the length before NLS/UTF8 converted. Signed-off-by: Keith Mok <ek9852@gmail.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16fat: gcc 4.3 warning fixOGAWA Hirofumi
This patch fixes the following warnings. fs/fat/dir.c: In function 'fat_parse_long': include/linux/msdos_fs.h:294: warning: array subscript is above array bounds include/linux/msdos_fs.h:295: warning: array subscript is above array bounds include/linux/msdos_fs.h:295: warning: array subscript is above array bounds The ->name is defined as "name[8], ext[3]", but fat_checksum() uses those as name[11]. There is no actual problem, but it's not a good manner. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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