From dd05add7b2b6004c5fa3a1f276f56d8668f86b65 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sat, 26 Sep 2026 19:20:30 -0300 Subject: netfs: zero the tail of a short DIO/unbuffered read The buffered read collector zero-fills the tail of a short read that stops below the inode's i_size (netfs_clear_unread()), so a read that races an extending write still returns the expected number of bytes. The non-buffered collector path does no such thing: it just records how much was transferred. Add the same zero-fill for the non-buffered case, gated on NETFS_SREQ_CLEAR_TAIL: a subreq's source sets that flag when a short result from it is known to be safe to treat as a hole, as opposed to NETFS_SREQ_HIT_EOF, which means the read genuinely ran off the end of the file and should be reported short as-is. Only CLEAR_TAIL should zero-fill here; a real EOF must stay a real short read. No source currently sets CLEAR_TAIL on an unbuffered/DIO subrequest, so this is inert on its own -- a following change teaches cifs to set it in the one case that needs it. Fixes: e2d46f2ec332 ("netfs: Change the read result collector to only use one work item") Reviewed-by: David Howells Reviewed-by: Namjae Jeon Signed-off-by: Paulo Alcantara Cc: Christian Brauner Cc: Matthew Wilcox Cc: Ronnie Sahlberg Cc: Shyam Prasad N Cc: Tom Talpey Cc: Bharath SM Cc: stable@vger.kernel.org --- scripts/ver_linux | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100755 scripts/ver_linux (limited to 'scripts/ver_linux') diff --git a/scripts/ver_linux b/scripts/ver_linux new file mode 100755 index 000000000..00bdaf30d --- /dev/null +++ b/scripts/ver_linux @@ -0,0 +1,97 @@ +#!/usr/bin/awk -f +# SPDX-License-Identifier: GPL-2.0 +# Before running this script please ensure that your PATH is +# typical as you use for compilation/installation. I use +# /bin /sbin /usr/bin /usr/sbin /usr/local/bin, but it may +# differ on your system. + +BEGIN { + usage = "If some fields are empty or look unusual you may have an old version.\n" + usage = usage "Compare to the current minimal requirements in Documentation/process/changes.rst\n" + print usage + + system("uname -a") + printf("\n") + + vernum = "[0-9]+([.]?[0-9]+)+" + libc = "libc[.]so[.][0-9]+$" + libcpp = "(libg|stdc)[+]+[.]so([.][0-9]+)+$" + + printversion("bash", version("bash --version")) + printversion("bc", version("bc --version")) + printversion("bindgen", version("bindgen --version")) + printversion("binutils", version("ld -v")) + printversion("bison", version("bison --version")) + printversion("btrfs-progs", version("btrfs --version")) + printversion("Clang", version("clang --version")) + printversion("Console-tools", version("loadkeys -V")) + printversion("Dynamic linker (ldd)", version("ldd --version")) + printversion("e2fsprogs", version("e2fsck -V")) + printversion("flex", version("flex --version")) + printversion("gdb", version("gdb -version")) + printversion("GNU awk", version("gawk --version")) + printversion("GNU C", version("gcc -dumpversion")) + printversion("GNU make", version("make --version")) + printversion("GNU tar", version("tar --version")) + printversion("GRUB2", version("grub2-install --version")) + printversion("GRUB", version("grub-install --version")) + printversion("gtags", version("gtags --version")) + printversion("iptables", version("iptables -V")) + printversion("Isdn4k-utils", version("isdnctrl")) + printversion("jfsutils", version("fsck.jfs -V")) + printversion("Kbd", version("loadkeys -V")) + printversion("kmod", version("kmod -V")) + + while ("ldconfig -p 2>/dev/null" | getline > 0) + if ($NF ~ libc || $NF ~ libcpp) + if (!seen[ver = version("readlink " $NF)]++) + printversion("Linux C" ($NF ~ libcpp? "++" : "") " Library", ver) + + printversion("mcelog", version("mcelog --version")) + printversion("mkimage", version("mkimage --version")) + printversion("Module-init-tools", version("depmod -V")) + printversion("Mount", version("mount --version")) + printversion("Net-tools", version("ifconfig --version")) + printversion("nfs-utils", version("showmount --version")) + printversion("openssl", version("openssl version")) + printversion("pahole", version("pahole --version")) + printversion("Pcmcia-cs", version("cardmgr -V")) + printversion("pcmciautils", version("pccardctl -V")) + printversion("PPP", version("pppd --version")) + printversion("procps", version("ps --version")) + printversion("Python", version("python3 -V")) + printversion("quota-tools", version("quota -V")) + printversion("Rust", version("rustc --version")) + printversion("Sh-utils", version("expr --v")) + printversion("Sphinx", version("sphinx-build --version")) + printversion("squashfs-tools", version("mksquashfs -version")) + printversion("udev", version("udevadm --version")) + printversion("util-linux", version("mount --version")) + printversion("Wireless-tools", version("iwconfig --version")) + printversion("xfsprogs", version("xfs_db -V")) + + while ("sort /proc/modules" | getline > 0) { + mods = mods sep $1 + sep = " " + } + printversion("Modules Loaded", mods) +} + +function version(cmd, ver) { + cmd = cmd " 2>&1" + while (cmd | getline > 0) { + if (match($0, vernum)) { + ver = substr($0, RSTART, RLENGTH) + break + } + } + close(cmd) + return ver +} + +function printversion(name, value, ofmt) { + if (value != "") { + ofmt = "%-20s\t%s\n" + printf(ofmt, name, value) + } +} -- cgit v1.3.1