Y2038

y2038@lists.linaro.org

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[GIT PULL] y2038: add inode timestamp clamping

by Arnd Bergmann

The following changes since commit a55aa89aab90fae7c815b0551b07be37db359d76: Linux 5.3-rc6 (2019-08-25 12:01:23 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git tags/y2038-vfs for you to fetch changes up to cba465b4f9820b0d929822a70341dde14909fc18: ext4: Reduce ext4 timestamp warnings (2019-09-04 22:54:53 +0200) ---------------------------------------------------------------- y2038: add inode timestamp clamping This series from Deepa Dinamani adds a per-superblock minimum/maximum timestamp limit for a file system, and clamps timestamps as they are written, to avoid random behavior from integer overflow as well as having different time stamps on disk vs in memory. At mount time, a warning is now printed for any file system that can represent current timestamps but not future timestamps more than 30 years into the future, similar to the arbitrary 30 year limit that was added to settimeofday(). This was picked as a compromise to warn users to migrate to other file systems (e.g. ext4 instead of ext3) when they need the file system to survive beyond 2038 (or similar limits in other file systems), but not get in the way of normal usage. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> ---------------------------------------------------------------- Arnd Bergmann (1): Merge branch 'limits' of https://github.com/deepa-hub/vfs into y2038 Deepa Dinamani (19): vfs: Add file timestamp range support vfs: Add timestamp_truncate() api timestamp_truncate: Replace users of timespec64_trunc mount: Add mount warning for impending timestamp expiry utimes: Clamp the timestamps before update fs: Fill in max and min timestamps in superblock 9p: Fill min and max timestamps in sb ext4: Initialize timestamps limits fs: nfs: Initialize filesystem timestamp ranges fs: cifs: Initialize filesystem timestamp ranges fs: fat: Initialize filesystem timestamp ranges fs: affs: Initialize filesystem timestamp ranges fs: sysv: Initialize filesystem timestamp ranges fs: ceph: Initialize filesystem timestamp ranges fs: hpfs: Initialize filesystem timestamp ranges fs: omfs: Initialize filesystem timestamp ranges pstore: fs superblock limits isofs: Initialize filesystem timestamp ranges ext4: Reduce ext4 timestamp warnings fs/9p/vfs_super.c | 6 +++++- fs/affs/amigaffs.c | 2 +- fs/affs/amigaffs.h | 3 +++ fs/affs/inode.c | 4 ++-- fs/affs/super.c | 4 ++++ fs/attr.c | 21 ++++++++++++--------- fs/befs/linuxvfs.c | 2 ++ fs/bfs/inode.c | 2 ++ fs/ceph/super.c | 2 ++ fs/cifs/cifsfs.c | 22 ++++++++++++++++++++++ fs/cifs/netmisc.c | 14 +++++++------- fs/coda/inode.c | 3 +++ fs/configfs/inode.c | 12 ++++++------ fs/cramfs/inode.c | 2 ++ fs/efs/super.c | 2 ++ fs/ext2/super.c | 2 ++ fs/ext4/ext4.h | 8 +++++++- fs/ext4/super.c | 17 +++++++++++++++-- fs/f2fs/file.c | 21 ++++++++++++--------- fs/fat/inode.c | 12 ++++++++++++ fs/freevxfs/vxfs_super.c | 2 ++ fs/hpfs/hpfs_fn.h | 6 ++---- fs/hpfs/super.c | 2 ++ fs/inode.c | 33 ++++++++++++++++++++++++++++++++- fs/isofs/inode.c | 7 +++++++ fs/jffs2/fs.c | 3 +++ fs/jfs/super.c | 2 ++ fs/kernfs/inode.c | 7 +++---- fs/minix/inode.c | 2 ++ fs/namespace.c | 33 ++++++++++++++++++++++++++++++++- fs/nfs/super.c | 20 +++++++++++++++++++- fs/ntfs/inode.c | 21 ++++++++++++--------- fs/omfs/inode.c | 4 ++++ fs/pstore/ram.c | 2 ++ fs/qnx4/inode.c | 2 ++ fs/qnx6/inode.c | 2 ++ fs/reiserfs/super.c | 3 +++ fs/romfs/super.c | 2 ++ fs/squashfs/super.c | 2 ++ fs/super.c | 2 ++ fs/sysv/super.c | 5 ++++- fs/ubifs/file.c | 21 ++++++++++++--------- fs/ufs/super.c | 7 +++++++ fs/utimes.c | 6 ++---- fs/xfs/xfs_super.c | 2 ++ include/linux/fs.h | 5 +++++ include/linux/time64.h | 2 ++ 47 files changed, 294 insertions(+), 72 deletions(-)

5 years, 2 months

[GIT PULL] ipc: fix regressions from y2038 patches

by Arnd Bergmann

The following changes since commit 089cf7f6ecb266b6a4164919a2e69bd2f938374a: Linux 5.3-rc7 (2019-09-02 09:57:40 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git tags/ipc-fixes for you to fetch changes up to fb377eb80c80339b580831a3c0fcce34a4c9d1ad: ipc: fix sparc64 ipc() wrapper (2019-09-07 21:42:25 +0200) ---------------------------------------------------------------- ipc: fix regressions from y2038 patches These are two regression fixes for bugs that got introduced during the system call rework that went into linux-5.1 but only bisected and fixed now: - One patch affects semtimedop() on many of the less common 32-bit architectures, this just needs a single-line bugfix. - The other affects only sparc64 and has a slightly more invasive workaround to apply the same change to sparc64 that was done to the generic code used everywhere else. ---------------------------------------------------------------- Arnd Bergmann (2): ipc: fix semtimedop for generic 32-bit architectures ipc: fix sparc64 ipc() wrapper arch/sparc/kernel/sys_sparc_64.c | 33 ++++++++++++++++++--------------- include/linux/syscalls.h | 19 +++++++++++++++++++ include/uapi/asm-generic/unistd.h | 2 +- ipc/util.h | 25 ++----------------------- 4 files changed, 40 insertions(+), 39 deletions(-)

5 years, 2 months

[PATCH 1/2] ipc: fix semtimedop for generic 32-bit architectures

by Arnd Bergmann

As Vincent noticed, the y2038 conversion of semtimedop in linux-5.1 broke when commit 00bf25d693e7 ("y2038: use time32 syscall names on 32-bit") changed all system calls on all architectures that take a 32-bit time_t to point to the _time32 implementation, but left out semtimedop in the asm-generic header. This affects all 32-bit architectures using asm-generic/unistd.h: h8300, unicore32, openrisc, nios2, hexagon, c6x, arc, nds32 and csky. The notable exception is riscv32, which has dropped support for the time32 system calls entirely. Reported-by: Vincent Chen <deanbo422(a)gmail.com> Cc: stable(a)vger.kernel.org Cc: Vincent Chen <deanbo422(a)gmail.com> Cc: Greentime Hu <green.hu(a)gmail.com> Cc: Yoshinori Sato <ysato(a)users.sourceforge.jp> Cc: Guan Xuetao <gxt(a)pku.edu.cn> Cc: Stafford Horne <shorne(a)gmail.com> Cc: Jonas Bonn <jonas(a)southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson(a)saunalahti.fi> Cc: Ley Foon Tan <lftan(a)altera.com> Cc: Richard Kuo <rkuo(a)codeaurora.org> Cc: Mark Salter <msalter(a)redhat.com> Cc: Aurelien Jacquiot <jacquiot.aurelien(a)gmail.com> Cc: Guo Ren <guoren(a)kernel.org> Fixes: 00bf25d693e7 ("y2038: use time32 syscall names on 32-bit") Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- Hi Vincent, Sorry for the delay since your report. Does this address your problem? Anyone else, please note that this patch is required since 5.1 to make sysvipc work on the listed architectures. --- include/uapi/asm-generic/unistd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index 1be0e798e362..1fc8faa6e973 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -569,7 +569,7 @@ __SYSCALL(__NR_semget, sys_semget) __SC_COMP(__NR_semctl, sys_semctl, compat_sys_semctl) #if defined(__ARCH_WANT_TIME32_SYSCALLS) || __BITS_PER_LONG != 32 #define __NR_semtimedop 192 -__SC_COMP(__NR_semtimedop, sys_semtimedop, sys_semtimedop_time32) +__SC_3264(__NR_semtimedop, sys_semtimedop_time32, sys_semtimedop) #endif #define __NR_semop 193 __SYSCALL(__NR_semop, sys_semop) -- 2.20.0

5 years, 2 months

[PATCH] adfs: Fill in max and min timestamps in sb

by Deepa Dinamani

Fill in the appropriate limits to avoid inconsistencies in the vfs cached inode times when timestamps are outside the permitted range. Note that the min timestamp is assumed to be 01 Jan 1970 00:00:00 (Unix epoch). This is consistent with the way we convert timestamps in adfs_adfs2unix_time(). Signed-off-by: Deepa Dinamani <deepa.kernel(a)gmail.com> --- This depends on the following patch in Arnd's y2038 tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground y2038 188d20bcd1eb ("vfs: Add file timestamp range support") fs/adfs/adfs.h | 13 +++++++++++++ fs/adfs/inode.c | 8 ++++---- fs/adfs/super.c | 2 ++ 3 files changed, 19 insertions(+), 4 deletions(-) diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h index 699c4fa8b78b..504ad80072ef 100644 --- a/fs/adfs/adfs.h +++ b/fs/adfs/adfs.h @@ -3,6 +3,19 @@ #include <linux/fs.h> #include <linux/adfs_fs.h> +/* + * 01 Jan 1970 00:00:00 (Unix epoch) as seconds since + * 01 Jan 1900 00:00:00 (RISC OS epoch) + */ +#define RISC_OS_EPOCH_DELTA 2208988800LL + +/* + * Convert 40 bit centi seconds to seconds + * since 01 Jan 1900 00:00:00 (RISC OS epoch) + * The result is 2248-06-03 06:57:57 GMT + */ +#define ADFS_MAX_TIMESTAMP ((0xFFFFFFFFFFLL / 100) - RISC_OS_EPOCH_DELTA) + /* Internal data structures for ADFS */ #define ADFS_FREE_FRAG 0 diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c index 5b8017ab0a98..11acd74fb099 100644 --- a/fs/adfs/inode.c +++ b/fs/adfs/inode.c @@ -162,7 +162,10 @@ static int adfs_mode2atts(struct super_block *sb, struct inode *inode, return attr; } -static const s64 nsec_unix_epoch_diff_risc_os_epoch = 2208988800000000000LL; +/* 01 Jan 1970 00:00:00 (Unix epoch) as nanoseconds since + * 01 Jan 1900 00:00:00 (RISC OS epoch) + */ +static const s64 nsec_unix_epoch_diff_risc_os_epoch = RISC_OS_EPOCH_DELTA * NSEC_PER_SEC; /* * Convert an ADFS time to Unix time. ADFS has a 40-bit centi-second time @@ -173,9 +176,6 @@ static void adfs_adfs2unix_time(struct timespec64 *tv, struct inode *inode) { unsigned int high, low; - /* 01 Jan 1970 00:00:00 (Unix epoch) as nanoseconds since - * 01 Jan 1900 00:00:00 (RISC OS epoch) - */ s64 nsec; if (!adfs_inode_is_stamped(inode)) diff --git a/fs/adfs/super.c b/fs/adfs/super.c index 7a3e6b394f2a..532e2afbc7a3 100644 --- a/fs/adfs/super.c +++ b/fs/adfs/super.c @@ -381,6 +381,8 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent) sb->s_fs_info = asb; sb->s_magic = ADFS_SUPER_MAGIC; sb->s_time_gran = 10000000; + sb->s_time_min = 0; + sb->s_time_max = ADFS_MAX_TIMESTAMP; /* set default options */ asb->s_uid = GLOBAL_ROOT_UID; -- 2.17.1

5 years, 2 months

[GIT PULL] vfs: Add support for timestamp limits

by Deepa Dinamani

Hi Al, Arnd, This is a pull request for filling in min and max timestamps for filesystems. I've added all the acks, and dropped the adfs patch. That will be merged through Russell's tree. Thanks, Deepa The following changes since commit 5d18cb62218608a1388858880ad3ec76d6cb0d3b: Add linux-next specific files for 20190828 (2019-08-28 19:59:14 +1000) are available in the Git repository at: https://github.com/deepa-hub/vfs limits for you to fetch changes up to f0f216afa4c7e4dee9121fde52ccf57f76119188: isofs: Initialize filesystem timestamp ranges (2019-08-28 19:19:36 -0700) ---------------------------------------------------------------- Deepa Dinamani (19): vfs: Add file timestamp range support vfs: Add timestamp_truncate() api timestamp_truncate: Replace users of timespec64_trunc mount: Add mount warning for impending timestamp expiry utimes: Clamp the timestamps before update fs: Fill in max and min timestamps in superblock 9p: Fill min and max timestamps in sb ext4: Initialize timestamps limits fs: nfs: Initialize filesystem timestamp ranges fs: cifs: Initialize filesystem timestamp ranges fs: fat: Initialize filesystem timestamp ranges fs: affs: Initialize filesystem timestamp ranges fs: sysv: Initialize filesystem timestamp ranges fs: ceph: Initialize filesystem timestamp ranges fs: orangefs: Initialize filesystem timestamp ranges fs: hpfs: Initialize filesystem timestamp ranges fs: omfs: Initialize filesystem timestamp ranges pstore: fs superblock limits isofs: Initialize filesystem timestamp ranges fs/9p/vfs_super.c | 6 +++++- fs/affs/amigaffs.c | 2 +- fs/affs/amigaffs.h | 3 +++ fs/affs/inode.c | 4 ++-- fs/affs/super.c | 4 ++++ fs/attr.c | 21 ++++++++++++--------- fs/befs/linuxvfs.c | 2 ++ fs/bfs/inode.c | 2 ++ fs/ceph/super.c | 2 ++ fs/cifs/cifsfs.c | 22 ++++++++++++++++++++++ fs/cifs/netmisc.c | 14 +++++++------- fs/coda/inode.c | 3 +++ fs/configfs/inode.c | 12 ++++++------ fs/cramfs/inode.c | 2 ++ fs/efs/super.c | 2 ++ fs/ext2/super.c | 2 ++ fs/ext4/ext4.h | 10 +++++++++- fs/ext4/super.c | 17 +++++++++++++++-- fs/f2fs/file.c | 21 ++++++++++++--------- fs/fat/inode.c | 12 ++++++++++++ fs/freevxfs/vxfs_super.c | 2 ++ fs/hpfs/hpfs_fn.h | 6 ++---- fs/hpfs/super.c | 2 ++ fs/inode.c | 33 ++++++++++++++++++++++++++++++++- fs/isofs/inode.c | 7 +++++++ fs/jffs2/fs.c | 3 +++ fs/jfs/super.c | 2 ++ fs/kernfs/inode.c | 7 +++---- fs/minix/inode.c | 2 ++ fs/namespace.c | 33 ++++++++++++++++++++++++++++++++- fs/nfs/super.c | 20 +++++++++++++++++++- fs/ntfs/inode.c | 21 ++++++++++++--------- fs/omfs/inode.c | 4 ++++ fs/orangefs/super.c | 2 ++ fs/pstore/ram.c | 2 ++ fs/qnx4/inode.c | 2 ++ fs/qnx6/inode.c | 2 ++ fs/reiserfs/super.c | 3 +++ fs/romfs/super.c | 2 ++ fs/squashfs/super.c | 2 ++ fs/super.c | 2 ++ fs/sysv/super.c | 5 ++++- fs/ubifs/file.c | 21 ++++++++++++--------- fs/ufs/super.c | 7 +++++++ fs/utimes.c | 6 ++---- fs/xfs/xfs_super.c | 2 ++ include/linux/fs.h | 5 +++++ include/linux/time64.h | 2 ++ 48 files changed, 298 insertions(+), 72 deletions(-)

5 years, 2 months

[PATCH v8 00/20] vfs: Add support for timestamp limits

by Deepa Dinamani

The series is an update and a more complete version of the previously posted series at https://lore.kernel.org/linux-fsdevel/20180122020426.2988-1-deepa.kernel@gm… Thanks to Arnd Bergmann for doing a few preliminary reviews. They helped me fix a few issues I had overlooked. The limits (sometimes granularity also) for the filesystems updated here are according to the following table: File system Time type Start year Expiration year Granularity cramfs fixed 0 0 romfs fixed 0 0 pstore ascii seconds (27 digit ascii) S64_MIN S64_MAX 1 coda INT64 S64_MIN S64_MAX 1 omfs 64-bit milliseconds 0 U64_MAX/ 1000 NSEC_PER_MSEC befs unsigned 48-bit seconds 0 0xffffffffffff alloc_super bfs unsigned 32-bit seconds 0 U32_MAX alloc_super efs unsigned 32-bit seconds 0 U32_MAX alloc_super ext2 signed 32-bit seconds S32_MIN S32_MAX alloc_super ext3 signed 32-bit seconds S32_MIN S32_MAX alloc_super ext4 (old) signed 32-bit seconds S32_MIN S32_MAX alloc_super ext4 (extra) 34-bit seconds, 30-bit ns S32_MIN 0x37fffffff 1 freevxfs u32 secs/usecs 0 U32_MAX alloc_super jffs2 unsigned 32-bit seconds 0 U32_MAX alloc_super jfs unsigned 32-bit seconds/ns 0 U32_MAX 1 minix unsigned 32-bit seconds 0 U32_MAX alloc_super orangefs u64 seconds 0 U64_MAX alloc_super qnx4 unsigned 32-bit seconds 0 U32_MAX alloc_super qnx6 unsigned 32-bit seconds 0 U32_MAX alloc_super reiserfs unsigned 32-bit seconds 0 U32_MAX alloc_super squashfs unsigned 32-bit seconds 0 U32_MAX alloc_super ufs1 signed 32-bit seconds S32_MIN S32_MAX NSEC_PER_SEC ufs2 signed 64-bit seconds/u32 ns S64_MIN S64_MAX 1 xfs signed 32-bit seconds/ns S32_MIN S32_MAX 1 ceph unsigned 32-bit second/ns 0 U32_MAX 1000 sysv unsigned 32-bit seconds 0 U32_MAX alloc_super affs u32 day, min, ticks 1978 u32_max days NSEC_PER_SEC nfsv2 unsigned 32-bit seconds/ns 0 U32_MAX 1 nfsv3 unsigned 32-bit seconds/ns 0 U32_MAX 1000 nfsv4 u64 seconds/u32 ns S64_MIN S64_MAX 1000 isofs u8 year since 1900 (fixable) 1900 2155 alloc_super hpfs unsigned 32-bit seconds 1970 2106 alloc_super fat 7-bit years, 2s resolution 1980 2107 cifs (smb) 7-bit years 1980 2107 cifs (modern) 64-bit 100ns since 1601 1601 30828 adfs 40-bit cs since 1900 1900 2248 9p (9P2000) unsigned 32-bit seconds 1970 2106 9p (9P2000.L) signed 64-bit seconds, ns 1970 S64_MAX Granularity column filled in by the alloc_super() in the above table indicates that the granularity is NSEC_PER_SEC. Note that anything not mentioned above still has the default limits S64_MIN..S64_MAX. The patches in the series are as structured below: 1. Add vfs support to maintain the limits per filesystem. 2. Add a new timestamp_truncate() api for clamping timestamps according to the filesystem limits. 3. Add a warning for mount syscall to indicate the impending expiry of timestamps. 4. Modify utimes to clamp the timestamps. 5. Fill in limits for filesystems. A test for checking file system timestamp limits has been posted at https://www.spinics.net/lists/fstests/msg12262.html Changes since v7: * Dropped fat modifications from timespec_truncate patch * Leverage timestamp_truncate function in utimes * Added a fix for pstore ramoops timestamps * Added ext4 warning for inodes without room for extended timestamps. * Made mount warning more human readable Changes since v6: * No change in mount behavior because of expiry of timestamps. * Included limits for more filesystems. Changes since v5: * Dropped y2038-specific changes Changes since v4: * Added documentation for boot param Changes since v3: * Remove redundant initializations in libfs.c * Change early_param to __setup similar to other root mount options. * Fix documentation warning Changes since v2: * Introduce early boot param override for checks. * Drop afs patch for timestamp limits. Changes since v1: * return EROFS on mount errors * fix mtime copy/paste error in utimes Deepa Dinamani (20): vfs: Add file timestamp range support vfs: Add timestamp_truncate() api timestamp_truncate: Replace users of timespec64_trunc mount: Add mount warning for impending timestamp expiry utimes: Clamp the timestamps before update fs: Fill in max and min timestamps in superblock 9p: Fill min and max timestamps in sb adfs: Fill in max and min timestamps in sb ext4: Initialize timestamps limits fs: nfs: Initialize filesystem timestamp ranges fs: cifs: Initialize filesystem timestamp ranges fs: fat: Initialize filesystem timestamp ranges fs: affs: Initialize filesystem timestamp ranges fs: sysv: Initialize filesystem timestamp ranges fs: ceph: Initialize filesystem timestamp ranges fs: orangefs: Initialize filesystem timestamp ranges fs: hpfs: Initialize filesystem timestamp ranges fs: omfs: Initialize filesystem timestamp ranges pstore: fs superblock limits isofs: Initialize filesystem timestamp ranges fs/9p/vfs_super.c | 6 +++++- fs/adfs/adfs.h | 13 +++++++++++++ fs/adfs/inode.c | 8 ++------ fs/adfs/super.c | 2 ++ fs/affs/amigaffs.c | 2 +- fs/affs/amigaffs.h | 3 +++ fs/affs/inode.c | 4 ++-- fs/affs/super.c | 4 ++++ fs/attr.c | 21 ++++++++++++--------- fs/befs/linuxvfs.c | 2 ++ fs/bfs/inode.c | 2 ++ fs/ceph/super.c | 2 ++ fs/cifs/cifsfs.c | 22 ++++++++++++++++++++++ fs/cifs/netmisc.c | 14 +++++++------- fs/coda/inode.c | 3 +++ fs/configfs/inode.c | 12 ++++++------ fs/cramfs/inode.c | 2 ++ fs/efs/super.c | 2 ++ fs/ext2/super.c | 2 ++ fs/ext4/ext4.h | 10 +++++++++- fs/ext4/super.c | 17 +++++++++++++++-- fs/f2fs/file.c | 21 ++++++++++++--------- fs/fat/inode.c | 12 ++++++++++++ fs/freevxfs/vxfs_super.c | 2 ++ fs/hpfs/hpfs_fn.h | 6 ++---- fs/hpfs/super.c | 2 ++ fs/inode.c | 33 ++++++++++++++++++++++++++++++++- fs/isofs/inode.c | 7 +++++++ fs/jffs2/fs.c | 3 +++ fs/jfs/super.c | 2 ++ fs/kernfs/inode.c | 7 +++---- fs/minix/inode.c | 2 ++ fs/namespace.c | 33 ++++++++++++++++++++++++++++++++- fs/nfs/super.c | 20 +++++++++++++++++++- fs/ntfs/inode.c | 21 ++++++++++++--------- fs/omfs/inode.c | 4 ++++ fs/orangefs/super.c | 2 ++ fs/pstore/ram.c | 2 ++ fs/qnx4/inode.c | 2 ++ fs/qnx6/inode.c | 2 ++ fs/reiserfs/super.c | 3 +++ fs/romfs/super.c | 2 ++ fs/squashfs/super.c | 2 ++ fs/super.c | 2 ++ fs/sysv/super.c | 5 ++++- fs/ubifs/file.c | 21 ++++++++++++--------- fs/ufs/super.c | 7 +++++++ fs/utimes.c | 6 ++---- fs/xfs/xfs_super.c | 2 ++ include/linux/fs.h | 5 +++++ include/linux/time64.h | 2 ++ 51 files changed, 315 insertions(+), 78 deletions(-) -- 2.17.1 Cc: adilger.kernel(a)dilger.ca Cc: adrian.hunter(a)intel.com Cc: aivazian.tigran(a)gmail.com Cc: al(a)alarsen.net Cc: anna.schumaker(a)netapp.com Cc: anton(a)enomsg.org Cc: asmadeus(a)codewreck.org Cc: ccross(a)android.com Cc: ceph-devel(a)vger.kernel.org Cc: coda(a)cs.cmu.edu Cc: codalist(a)coda.cs.cmu.edu Cc: darrick.wong(a)oracle.com Cc: dedekind1(a)gmail.com Cc: devel(a)lists.orangefs.org Cc: dsterba(a)suse.com Cc: dushistov(a)mail.ru Cc: dwmw2(a)infradead.org Cc: ericvh(a)gmail.com Cc: gregkh(a)linuxfoundation.org Cc: hch(a)infradead.org Cc: hch(a)lst.de Cc: hirofumi(a)mail.parknet.co.jp Cc: hubcap(a)omnibond.com Cc: idryomov(a)gmail.com Cc: jack(a)suse.com Cc: jaegeuk(a)kernel.org Cc: jaharkes(a)cs.cmu.edu Cc: jfs-discussion(a)lists.sourceforge.net Cc: jlbec(a)evilplan.org Cc: keescook(a)chromium.org Cc: linux-cifs(a)vger.kernel.org Cc: linux-ext4(a)vger.kernel.org Cc: linux-f2fs-devel(a)lists.sourceforge.net Cc: linux-karma-devel(a)lists.sourceforge.net Cc: linux-mtd(a)lists.infradead.org Cc: linux-nfs(a)vger.kernel.org Cc: linux-ntfs-dev(a)lists.sourceforge.net Cc: linux-xfs(a)vger.kernel.org Cc: lucho(a)ionkov.net Cc: luisbg(a)kernel.org Cc: martin(a)omnibond.com Cc: me(a)bobcopeland.com Cc: mikulas(a)artax.karlin.mff.cuni.cz Cc: nico(a)fluxnic.net Cc: phillip(a)squashfs.org.uk Cc: reiserfs-devel(a)vger.kernel.org Cc: richard(a)nod.at Cc: sage(a)redhat.com Cc: salah.triki(a)gmail.com Cc: sfrench(a)samba.org Cc: shaggy(a)kernel.org Cc: tj(a)kernel.org Cc: tony.luck(a)intel.com Cc: trond.myklebust(a)hammerspace.com Cc: tytso(a)mit.edu Cc: v9fs-developer(a)lists.sourceforge.net Cc: yuchao0(a)huawei.com Cc: zyan(a)redhat.com

5 years, 3 months

[PATCH 00/20] vfs: Add support for timestamp limits

by Deepa Dinamani

The series is an update and a more complete version of the previously posted series at https://lore.kernel.org/linux-fsdevel/20180122020426.2988-1-deepa.kernel@gm… Thanks to Arnd Bergmann for doing a few preliminary reviews. They helped me fix a few issues I had overlooked. The limits (sometimes granularity also) for the filesystems updated here are according to the following table: File system Time type Start year Expiration year Granularity cramfs fixed 0 0 romfs fixed 0 0 pstore ascii seconds (27 digit ascii) S64_MIN S64_MAX NSEC_PER_USEC coda INT64 S64_MIN S64_MAX 1 omfs 64-bit milliseconds 0 U64_MAX/ 1000 NSEC_PER_MSEC befs unsigned 48-bit seconds 0 0xffffffffffff alloc_super bfs unsigned 32-bit seconds 0 U32_MAX alloc_super efs unsigned 32-bit seconds 0 U32_MAX alloc_super ext2 signed 32-bit seconds S32_MIN S32_MAX alloc_super ext3 signed 32-bit seconds S32_MIN S32_MAX alloc_super ext4 (old) signed 32-bit seconds S32_MIN S32_MAX alloc_super ext4 (extra) 34-bit seconds, 30-bit ns S32_MIN 0x37fffffff 1 freevxfs u32 secs/usecs 0 U32_MAX alloc_super jffs2 unsigned 32-bit seconds 0 U32_MAX alloc_super jfs unsigned 32-bit seconds/ns 0 U32_MAX 1 minix unsigned 32-bit seconds 0 U32_MAX alloc_super orangefs u64 seconds 0 U64_MAX alloc_super qnx4 unsigned 32-bit seconds 0 U32_MAX alloc_super qnx6 unsigned 32-bit seconds 0 U32_MAX alloc_super reiserfs unsigned 32-bit seconds 0 U32_MAX alloc_super squashfs unsigned 32-bit seconds 0 U32_MAX alloc_super ufs1 signed 32-bit seconds S32_MIN S32_MAX NSEC_PER_SEC ufs2 signed 64-bit seconds/u32 ns S64_MIN S64_MAX 1 xfs signed 32-bit seconds/ns S32_MIN S32_MAX 1 ceph unsigned 32-bit second/ns 0 U32_MAX 1000 sysv unsigned 32-bit seconds 0 U32_MAX alloc_super affs u32 day, min, ticks 1978 u32_max days NSEC_PER_SEC nfsv2 unsigned 32-bit seconds/ns 0 U32_MAX 1 nfsv3 unsigned 32-bit seconds/ns 0 U32_MAX 1000 nfsv4 u64 seconds/u32 ns S64_MIN S64_MAX 1000 isofs u8 year since 1900 (fixable) 1900 2155 alloc_super hpfs unsigned 32-bit seconds 1970 2106 alloc_super fat 7-bit years, 2s resolution 1980 2107 cifs (smb) 7-bit years 1980 2107 cifs (modern) 64-bit 100ns since 1601 1601 30828 adfs 40-bit cs since 1900 1900 2248 9p (9P2000) unsigned 32-bit seconds 1970 2106 9p (9P2000.L) signed 64-bit seconds, ns 1970 S64_MAX Granularity column filled in by the alloc_super() in the above table indicates that the granularity is NSEC_PER_SEC. Note that anything not mentioned above still has the default limits S64_MIN..S64_MAX. The patches in the series are as structured below: 1. Add vfs support to maintain the limits per filesystem. 2. Add a new timestamp_truncate() api for clamping timestamps according to the filesystem limits. 3. Add a warning for mount syscall to indicate the impending expiry of timestamps. 4. Modify utimes to clamp the timestamps. 5. Fill in limits for filesystems. An updated version of the test for checking file system timestamp limits has been posted at https://www.spinics.net/lists/fstests/msg12262.html Changes from previous version: * No change in mount behavior because of expiry of timestamps. * Included limits for more filesystems. Deepa Dinamani (20): vfs: Add file timestamp range support vfs: Add timestamp_truncate() api timestamp_truncate: Replace users of timespec64_trunc mount: Add mount warning for impending timestamp expiry utimes: Clamp the timestamps before update fs: Fill in max and min timestamps in superblock 9p: Fill min and max timestamps in sb adfs: Fill in max and min timestamps in sb ext4: Initialize timestamps limits fs: nfs: Initialize filesystem timestamp ranges fs: cifs: Initialize filesystem timestamp ranges fs: fat: Initialize filesystem timestamp ranges fs: affs: Initialize filesystem timestamp ranges fs: sysv: Initialize filesystem timestamp ranges fs: ceph: Initialize filesystem timestamp ranges fs: orangefs: Initialize filesystem timestamp ranges fs: hpfs: Initialize filesystem timestamp ranges fs: omfs: Initialize filesystem timestamp ranges pstore: fs superblock limits isofs: Initialize filesystem timestamp ranges fs/9p/vfs_super.c | 6 +++++- fs/adfs/adfs.h | 13 +++++++++++++ fs/adfs/inode.c | 8 ++------ fs/adfs/super.c | 2 ++ fs/affs/amigaffs.c | 2 +- fs/affs/amigaffs.h | 3 +++ fs/affs/inode.c | 4 ++-- fs/affs/super.c | 4 ++++ fs/attr.c | 21 ++++++++++++--------- fs/befs/linuxvfs.c | 2 ++ fs/bfs/inode.c | 2 ++ fs/ceph/super.c | 2 ++ fs/cifs/cifsfs.c | 22 ++++++++++++++++++++++ fs/cifs/netmisc.c | 14 +++++++------- fs/coda/inode.c | 3 +++ fs/configfs/inode.c | 12 ++++++------ fs/cramfs/inode.c | 2 ++ fs/efs/super.c | 2 ++ fs/ext2/super.c | 2 ++ fs/ext4/ext4.h | 4 ++++ fs/ext4/super.c | 17 +++++++++++++++-- fs/f2fs/file.c | 21 ++++++++++++--------- fs/fat/inode.c | 12 ++++++++++++ fs/fat/misc.c | 5 +++-- fs/freevxfs/vxfs_super.c | 2 ++ fs/hpfs/hpfs_fn.h | 6 ++---- fs/hpfs/super.c | 2 ++ fs/inode.c | 33 ++++++++++++++++++++++++++++++++- fs/isofs/inode.c | 7 +++++++ fs/jffs2/fs.c | 3 +++ fs/jfs/super.c | 2 ++ fs/kernfs/inode.c | 6 +++--- fs/minix/inode.c | 2 ++ fs/namespace.c | 11 +++++++++++ fs/nfs/super.c | 20 +++++++++++++++++++- fs/ntfs/inode.c | 21 ++++++++++++--------- fs/omfs/inode.c | 4 ++++ fs/orangefs/super.c | 2 ++ fs/pstore/inode.c | 4 +++- fs/qnx4/inode.c | 2 ++ fs/qnx6/inode.c | 2 ++ fs/reiserfs/super.c | 3 +++ fs/romfs/super.c | 2 ++ fs/squashfs/super.c | 2 ++ fs/super.c | 2 ++ fs/sysv/super.c | 5 ++++- fs/ubifs/file.c | 21 ++++++++++++--------- fs/ufs/super.c | 7 +++++++ fs/utimes.c | 17 +++++++++++++---- fs/xfs/xfs_super.c | 2 ++ include/linux/fs.h | 5 +++++ include/linux/time64.h | 2 ++ 52 files changed, 304 insertions(+), 78 deletions(-) -- 2.17.1 Cc: adilger.kernel(a)dilger.ca Cc: adrian.hunter(a)intel.com Cc: aivazian.tigran(a)gmail.com Cc: al(a)alarsen.net Cc: anna.schumaker(a)netapp.com Cc: anton(a)enomsg.org Cc: anton(a)tuxera.com Cc: asmadeus(a)codewreck.org Cc: ccross(a)android.com Cc: ceph-devel(a)vger.kernel.org Cc: coda(a)cs.cmu.edu Cc: codalist(a)coda.cs.cmu.edu Cc: darrick.wong(a)oracle.com Cc: dedekind1(a)gmail.com Cc: devel(a)lists.orangefs.org Cc: dsterba(a)suse.com Cc: dushistov(a)mail.ru Cc: dwmw2(a)infradead.org Cc: ericvh(a)gmail.com Cc: gregkh(a)linuxfoundation.org Cc: hch(a)infradead.org Cc: hch(a)lst.de Cc: hirofumi(a)mail.parknet.co.jp Cc: hubcap(a)omnibond.com Cc: idryomov(a)gmail.com Cc: jack(a)suse.com Cc: jaegeuk(a)kernel.org Cc: jaharkes(a)cs.cmu.edu Cc: jfs-discussion(a)lists.sourceforge.net Cc: jlbec(a)evilplan.org Cc: keescook(a)chromium.org Cc: linux-cifs(a)vger.kernel.org Cc: linux-ext4(a)vger.kernel.org Cc: linux-f2fs-devel(a)lists.sourceforge.net Cc: linux-karma-devel(a)lists.sourceforge.net Cc: linux-mtd(a)lists.infradead.org Cc: linux-nfs(a)vger.kernel.org Cc: linux-ntfs-dev(a)lists.sourceforge.net Cc: linux-xfs(a)vger.kernel.org Cc: lucho(a)ionkov.net Cc: luisbg(a)kernel.org Cc: martin(a)omnibond.com Cc: me(a)bobcopeland.com Cc: mikulas(a)artax.karlin.mff.cuni.cz Cc: nico(a)fluxnic.net Cc: phillip(a)squashfs.org.uk Cc: reiserfs-devel(a)vger.kernel.org Cc: richard(a)nod.at Cc: sage(a)redhat.com Cc: salah.triki(a)gmail.com Cc: sfrench(a)samba.org Cc: shaggy(a)kernel.org Cc: tj(a)kernel.org Cc: tony.luck(a)intel.com Cc: trond.myklebust(a)hammerspace.com Cc: tytso(a)mit.edu Cc: v9fs-developer(a)lists.sourceforge.net Cc: yuchao0(a)huawei.com Cc: zyan(a)redhat.com

5 years, 3 months

Re: [Y2038] [PATCH 09/20] ext4: Initialize timestamps limits

by Deepa Dinamani

> Rather than printing a warning at mount time (which may be confusing > to users for a problem they may never see), it makes sense to only > print such a warning in the vanishingly small case that someone actually > tries to modify the inode timestamp but it doesn't fit, rather than on > the theoretical case that may never happen. Arnd and I were discussing and we came to a similar conclusion that we would not warn at mount. Arnd suggested maybe we include a pr_warn_ratelimited() when we do write to these special inodes. In general, there is an agreement to leave the fs granularity to a higher resolution for such super blocks. And hence, the timestamps for these special cases will never be clamped in memory.(Assuming we do not want to make more changes and try to do something like __ext4_expand_extra_isize() for in memory inode updates) We could easily try to clamp these timestamps when they get written out to the disk by modifying the EXT4_INODE_SET_XTIME to include such a clamp. And, at this point we could also warn. If this is acceptable, I could post an update. -Deepa

5 years, 3 months

[PATCH 0/2] Unify the system call scripts

by Firoz Khan

System call table generation support is provided for alpha, ia64, m68k, microblaze, mips, parisc, powerpc, sh, sparc and xtensa architectures. The implementat- ions are almost similar across all the above archte- ctures. In order to reduce the source code across all the above architectures, create common ".sh" files and keep it in the common directory, script/. This will be a generic scripts which can use for all the above architectures. This patch depends on; https://lore.kernel.org/lkml/1546439331-18646-1-git-send-email-firoz.khan@l… Firoz Khan (2): mips: remove nargs from __SYSCALL mips: generate uapi header and system call table files arch/mips/kernel/scall32-o32.S | 2 +- arch/mips/kernel/scall64-n32.S | 2 +- arch/mips/kernel/scall64-n64.S | 2 +- arch/mips/kernel/scall64-o32.S | 2 +- arch/mips/kernel/syscalls/Makefile | 6 +++--- arch/mips/kernel/syscalls/syscallhdr.sh | 37 --------------------------------- arch/mips/kernel/syscalls/syscallnr.sh | 28 ------------------------- arch/mips/kernel/syscalls/syscalltbl.sh | 36 -------------------------------- 8 files changed, 7 insertions(+), 108 deletions(-) delete mode 100644 arch/mips/kernel/syscalls/syscallhdr.sh delete mode 100644 arch/mips/kernel/syscalls/syscallnr.sh delete mode 100644 arch/mips/kernel/syscalls/syscalltbl.sh -- 1.9.1

5 years, 3 months

Drive World Conference and Expo 2019 - Attendees List

by Richard Cohen

Hi, I believe that you are one of the Exhibitors of upcoming event "Drive World Conference & Expo 2019" held on 27th - 29th August| Santa Clara, United States. If you are interested in acquiring the attendees list of Drive World Conference & Expo reply to this email and I shall revert back with pricing, counts and other deliverables. Thank you and I look forward to hear from you soon. Regards, Richard Cohen | Inside Sales, USA & Europe| Email : richardc(a)expolist.us "If you don't wish to receive emails from us reply back with LEAVE OUT"

5 years, 4 months

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