26 Aug, 2011
1 commit
-
The bug was accidentally found by the following program:
#include
#include
#include
static int setsysinfo(unsigned long op, void *buffer, unsigned long size,
int *start, void *arg, unsigned long flag) {
return syscall(__NR_osf_setsysinfo, op, buffer, size, start, arg, flag);
}int main(int argc, char **argv) {
short x[10];
unsigned int buf[2] = { SSIN_UACPROC, UAC_SIGBUS, };
setsysinfo(SSI_NVPAIRS, buf, 1, 0, 0, 0);int *y = (int*) (x+1);
*y = 0;
return 0;
}The program shoud fail on SIGBUS, but didn't.
The patch is a second part of userspace flag fix (commit 745dd2405e28
"Alpha: Rearrange thread info flags fixing two regressions").Deleted outdated out-of-sync 'UAC_SHIFT' (the cause of bug) in favour of
'ALPHA_UAC_SHIFT'.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Sergei Trofimovich
Acked-by: Michael Cree
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Jun, 2011
1 commit
-
Fix several security issues in Alpha-specific syscalls. Untested, but
mostly trivial.1. Signedness issue in osf_getdomainname allows copying out-of-bounds
kernel memory to userland.2. Signedness issue in osf_sysinfo allows copying large amounts of
kernel memory to userland.3. Typo (?) in osf_getsysinfo bounds minimum instead of maximum copy
size, allowing copying large amounts of kernel memory to userland.4. Usage of user pointer in osf_wait4 while under KERNEL_DS allows
privilege escalation via writing return value of sys_wait4 to kernel
memory.Signed-off-by: Dan Rosenberg
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Mar, 2011
1 commit
-
New helpers: user_statfs() and fd_statfs(), taking userland pathname and
descriptor resp. and filling struct kstatfs. Syscalls of statfs family
(native, compat and foreign - osf and hpux on alpha and parisc resp.)
switched to those. Removes some boilerplate code, simplifies cleanup
on errors...Signed-off-by: Al Viro
17 Jan, 2011
1 commit
-
Remove the leftover from the commit 14e2acd86865 ("select:
fix alpha OSF wrapper").Signed-off-by: Namhyung Kim
Cc: Arjan van de Ven
Signed-off-by: Matt Turner
19 Sep, 2010
2 commits
-
All uses of the BKL on alpha are totally bogus, nothing
is really protected by this. Remove the remaining users
so we don't have to mark alpha as 'depends on BKL'.Signed-off-by: Arnd Bergmann
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: linux-alpha@vger.kernel.org
Signed-off-by: Matt Turner -
Acked-by: Richard Henderson
Signed-off-by: Joe Perches
Signed-off-by: Matt Turner
29 Aug, 2010
1 commit
-
Fix a comma that got accidentally deleted from sys_osf_statfs() leading to the
following warning:arch/alpha/kernel/osf_sys.c: In function 'SYSC_osf_statfs':
arch/alpha/kernel/osf_sys.c:255: error: syntax error before 'buffer'Signed-off-by: David Howells
Signed-off-by: Linus Torvalds
14 Aug, 2010
1 commit
-
Mark arguments to certain system calls as being const where they should be but
aren't. The list includes:(*) The filename arguments of various stat syscalls, execve(), various utimes
syscalls and some mount syscalls.(*) The filename arguments of some syscall helpers relating to the above.
(*) The buffer argument of various write syscalls.
Signed-off-by: David Howells
Acked-by: David S. Miller
Signed-off-by: Linus Torvalds
10 Aug, 2010
1 commit
-
We'll need the path to implement the flags field for statvfs support.
We do have it available in all callers except:- ecryptfs_statfs. This one doesn't actually need vfs_statfs but just
needs to do a caller to the lower filesystem statfs method.
- sys_ustat. Add a non-exported statfs_by_dentry helper for it which
doesn't won't be able to fill out the flags field later on.In addition rename the helpers for statfs vs fstatfs to do_*statfs instead
of the misleading vfs prefix.Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro
30 Mar, 2010
1 commit
-
…it slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
07 Mar, 2010
1 commit
-
The initial -EINVAL value is overwritten by `retval = PTR_ERR(name)'. If
this isn't an error pointer and typenr is not 1, 6 or 9, then this retval,
a pointer cast to a long, is returned.Signed-off-by: Roel Kluin
Acked-by: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Dec, 2009
1 commit
-
New helper - sys_mmap_pgoff(); switch syscalls to using it.
Acked-by: David S. Miller
Signed-off-by: Al Viro
12 Jun, 2009
1 commit
-
Signed-off-by: Al Viro
28 Mar, 2009
1 commit
-
The last user of do_pipe is in arch/alpha/, after replacing it with
do_pipe_flags, the do_pipe can be totally dropped.Signed-off-by: Cheng Renquan
Acked-by: Richard Henderson
Signed-off-by: Al Viro
30 Jan, 2009
1 commit
-
Convert OSF syscalls and add alpha specific SYSCALL_ALIAS() macro.
Signed-off-by: Ivan Kokshaysky
Cc: Richard Henderson
Cc: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Oct, 2008
1 commit
-
…inux/kernel/git/tip/linux-2.6-tip
* 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (37 commits)
hrtimers: add missing docbook comments to struct hrtimer
hrtimers: simplify hrtimer_peek_ahead_timers()
hrtimers: fix docbook comments
DECLARE_PER_CPU needs linux/percpu.h
hrtimers: fix typo
rangetimers: fix the bug reported by Ingo for real
rangetimer: fix BUG_ON reported by Ingo
rangetimer: fix x86 build failure for the !HRTIMERS case
select: fix alpha OSF wrapper
select: fix alpha OSF wrapper
hrtimer: peek at the timer queue just before going idle
hrtimer: make the futex() system call use the per process slack value
hrtimer: make the nanosleep() syscall use the per process slack
hrtimer: fix signed/unsigned bug in slack estimator
hrtimer: show the timer ranges in /proc/timer_list
hrtimer: incorporate feedback from Peter Zijlstra
hrtimer: add a hrtimer_start_range() function
hrtimer: another build fix
hrtimer: fix build bug found by Ingo
hrtimer: make select() and poll() use the hrtimer range feature
...
23 Oct, 2008
1 commit
-
It's not the final state, but it allows moving ->readdir() instances
to passing filldir return value to caller of vfs_readdir().Signed-off-by: Al Viro
07 Oct, 2008
1 commit
-
... alpha calls the core select code from inside it's architecture
code for emulating OSF; this patch makes it compile againSigned-off-by: Arjan van de Ven
Signed-off-by: Ingo Molnar
25 Aug, 2008
1 commit
-
Return value of filldir callback is just "should we stop here"; it's
not a usable channel for passing error values (i.e. ->readdir() will
forget anything except "is it non-zero").Signed-off-by: Al Viro
27 Jul, 2008
1 commit
-
* do not pass nameidata; struct path is all the callers want.
* switch to new helpers:
user_path_at(dfd, pathname, flags, &path)
user_path(pathname, &path)
user_lpath(pathname, &path)
user_path_dir(pathname, &path) (fail if not a directory)
The last 3 are trivial macro wrappers for the first one.
* remove nameidata in callers.Signed-off-by: Al Viro
02 May, 2008
1 commit
-
... instead of open-coding it
Signed-off-by: Al Viro
24 Apr, 2008
1 commit
-
OSF/1 brk(2) was broken by following one-liner in sys_brk()
(commit 4cc6028d4040f95cdb590a87db478b42b8be0508):- if (brk < mm->end_code)
+ if (brk < mm->start_brk)
goto out;The problem is that osf_set_program_attributes()
does update mm->end_code, but not mm->start_brk,
which still contains inappropriate value left from
binary loader, so brk() always fails.Signed-off-by: Ivan Kokshaysky
Signed-off-by: Linus Torvalds
15 Feb, 2008
2 commits
-
* Add path_put() functions for releasing a reference to the dentry and
vfsmount of a struct path in the right order* Switch from path_release(nd) to path_put(&nd->path)
* Rename dput_path() to path_put_conditional()
[akpm@linux-foundation.org: fix cifs]
Signed-off-by: Jan Blunck
Signed-off-by: Andreas Gruenbacher
Acked-by: Christoph Hellwig
Cc:
Cc: Al Viro
Cc: Steven French
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is the central patch of a cleanup series. In most cases there is no good
reason why someone would want to use a dentry for itself. This series reflects
that fact and embeds a struct path into nameidata.Together with the other patches of this series
- it enforced the correct order of getting/releasing the reference count on
pairs
- it prepares the VFS for stacking support since it is essential to have a
struct path in every place where the stack can be traversed
- it reduces the overall code size:without patch series:
text data bss dec hex filename
5321639 858418 715768 6895825 6938d1 vmlinuxwith patch series:
text data bss dec hex filename
5320026 858418 715768 6894212 693284 vmlinuxThis patch:
Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix cifs]
[akpm@linux-foundation.org: fix smack]
Signed-off-by: Jan Blunck
Signed-off-by: Andreas Gruenbacher
Acked-by: Christoph Hellwig
Cc: Al Viro
Cc: Casey Schaufler
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Feb, 2008
1 commit
-
Remove now unnecessary inclusions of {asm,linux}/a.out.h.
[akpm@linux-foundation.org: fix alpha build]
Signed-off-by: David Howells
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Feb, 2008
1 commit
-
NR_OPEN (historically set to 1024*1024) actually forbids processes to open
more than 1024*1024 handles.Unfortunatly some production servers hit the not so 'ridiculously high
value' of 1024*1024 file descriptors per process.Changing NR_OPEN is not considered safe because of vmalloc space potential
exhaust.This patch introduces a new sysctl (/proc/sys/fs/nr_open) wich defaults to
1024*1024, so that admins can decide to change this limit if their workload
needs it.[akpm@linux-foundation.org: export it for sparc64]
Signed-off-by: Eric Dumazet
Cc: Alan Cox
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: "David S. Miller"
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Oct, 2007
1 commit
-
Spelling fixes in arch/alpha/.
Signed-off-by: Simon Arlott
Signed-off-by: Adrian Bunk
09 May, 2007
1 commit
-
Implement utimensat(2) which is an extension to futimesat(2) in that it
a) supports nano-second resolution for the timestamps
b) allows to selectively ignore the atime/mtime value
c) allows to selectively use the current time for either atime or mtime
d) supports changing the atime/mtime of a symlink itself along the lines
of the BSD lutimes(3) functionsFor this change the internally used do_utimes() functions was changed to
accept a timespec time value and an additional flags parameter.Additionally the sys_utime function was changed to match compat_sys_utime
which already use do_utimes instead of duplicating the work.Also, the completely missing futimensat() functionality is added. We have
such a function in glibc but we have to resort to using /proc/self/fd/* which
not everybody likes (chroot etc).Test application (the syscall number will need per-arch editing):
#include
#include
#include
#include
#include
#include#define __NR_utimensat 280
#define UTIME_NOW ((1l << 30) - 1l)
#define UTIME_OMIT ((1l << 30) - 2l)int
main(void)
{
int status = 0;int fd = open("ttt", O_RDWR|O_CREAT|O_EXCL, 0666);
if (fd == -1)
error (1, errno, "failed to create test file \"ttt\"");struct stat64 st1;
if (fstat64 (fd, &st1) != 0)
error (1, errno, "fstat failed");struct timespec t[2];
t[0].tv_sec = 0;
t[0].tv_nsec = 0;
t[1].tv_sec = 0;
t[1].tv_nsec = 0;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");struct stat64 st2;
if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");if (st2.st_atim.tv_sec != 0 || st2.st_atim.tv_nsec != 0)
{
puts ("atim not reset to zero");
status = 1;
}
if (st2.st_mtim.tv_sec != 0 || st2.st_mtim.tv_nsec != 0)
{
puts ("mtim not reset to zero");
status = 1;
}
if (status != 0)
goto out;t[0] = st1.st_atim;
t[1].tv_sec = 0;
t[1].tv_nsec = UTIME_OMIT;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");if (st2.st_atim.tv_sec != st1.st_atim.tv_sec
|| st2.st_atim.tv_nsec != st1.st_atim.tv_nsec)
{
puts ("atim not set");
status = 1;
}
if (st2.st_mtim.tv_sec != 0 || st2.st_mtim.tv_nsec != 0)
{
puts ("mtim changed from zero");
status = 1;
}
if (status != 0)
goto out;t[0].tv_sec = 0;
t[0].tv_nsec = UTIME_OMIT;
t[1] = st1.st_mtim;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");if (st2.st_atim.tv_sec != st1.st_atim.tv_sec
|| st2.st_atim.tv_nsec != st1.st_atim.tv_nsec)
{
puts ("mtim changed from original time");
status = 1;
}
if (st2.st_mtim.tv_sec != st1.st_mtim.tv_sec
|| st2.st_mtim.tv_nsec != st1.st_mtim.tv_nsec)
{
puts ("mtim not set");
status = 1;
}
if (status != 0)
goto out;sleep (2);
t[0].tv_sec = 0;
t[0].tv_nsec = UTIME_NOW;
t[1].tv_sec = 0;
t[1].tv_nsec = UTIME_NOW;
if (syscall(__NR_utimensat, AT_FDCWD, "ttt", t, 0) != 0)
error (1, errno, "utimensat failed");if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");struct timeval tv;
gettimeofday(&tv,NULL);if (st2.st_atim.tv_sec tv.tv_sec)
{
puts ("atim not set to NOW");
status = 1;
}
if (st2.st_mtim.tv_sec tv.tv_sec)
{
puts ("mtim not set to NOW");
status = 1;
}if (symlink ("ttt", "tttsym") != 0)
error (1, errno, "cannot create symlink");t[0].tv_sec = 0;
t[0].tv_nsec = 0;
t[1].tv_sec = 0;
t[1].tv_nsec = 0;
if (syscall(__NR_utimensat, AT_FDCWD, "tttsym", t, AT_SYMLINK_NOFOLLOW) != 0)
error (1, errno, "utimensat failed");if (lstat64 ("tttsym", &st2) != 0)
error (1, errno, "lstat failed");if (st2.st_atim.tv_sec != 0 || st2.st_atim.tv_nsec != 0)
{
puts ("symlink atim not reset to zero");
status = 1;
}
if (st2.st_mtim.tv_sec != 0 || st2.st_mtim.tv_nsec != 0)
{
puts ("symlink mtim not reset to zero");
status = 1;
}
if (status != 0)
goto out;t[0].tv_sec = 1;
t[0].tv_nsec = 0;
t[1].tv_sec = 1;
t[1].tv_nsec = 0;
if (syscall(__NR_utimensat, fd, NULL, t, 0) != 0)
error (1, errno, "utimensat failed");if (fstat64 (fd, &st2) != 0)
error (1, errno, "fstat failed");if (st2.st_atim.tv_sec != 1 || st2.st_atim.tv_nsec != 0)
{
puts ("atim not reset to one");
status = 1;
}
if (st2.st_mtim.tv_sec != 1 || st2.st_mtim.tv_nsec != 0)
{
puts ("mtim not reset to one");
status = 1;
}if (status == 0)
puts ("all OK");out:
close (fd);
unlink ("ttt");
unlink ("tttsym");return status;
}[akpm@linux-foundation.org: add missing i386 syscall table entry]
Signed-off-by: Ulrich Drepper
Cc: Alexey Dobriyan
Cc: Michael Kerrisk
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 May, 2007
2 commits
-
ROUND_UP macro cleanup use ALIGN
Signed-off-by: Milind Arun Choudhary
Cc: Ivan Kokshaysky
Cc: Richard Henderson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Handle MAP_FIXED in alpha's arch_get_unmapped_area(), simple case, just return
the address as passed inSigned-off-by: Benjamin Herrenschmidt
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Dec, 2006
1 commit
-
Currently, each fdtable supports three dynamically-sized arrays of data: the
fdarray and two fdsets. The code allows the number of fds supported by the
fdarray (fdtable->max_fds) to differ from the number of fds supported by each
of the fdsets (fdtable->max_fdset).In practice, it is wasteful for these two sizes to differ: whenever we hit a
limit on the smaller-capacity structure, we will reallocate the entire fdtable
and all the dynamic arrays within it, so any delta in the memory used by the
larger-capacity structure will never be touched at all.Rather than hogging this excess, we shouldn't even allocate it in the first
place, and keep the capacities of the fdarray and the fdsets equal. This
patch removes fdtable->max_fdset. As an added bonus, most of the supporting
code becomes simpler.Signed-off-by: Vadim Lobanov
Cc: Christoph Hellwig
Cc: Al Viro
Cc: Dipankar Sarma
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Dec, 2006
1 commit
-
Signed-off-by: Josef Sipek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Oct, 2006
1 commit
-
These patches make the kernel pass 64-bit inode numbers internally when
communicating to userspace, even on a 32-bit system. They are required
because some filesystems have intrinsic 64-bit inode numbers: NFS3+ and XFS
for example. The 64-bit inode numbers are then propagated to userspace
automatically where the arch supports it.Problems have been seen with userspace (eg: ld.so) using the 64-bit inode
number returned by stat64() or getdents64() to differentiate files, and
failing because the 64-bit inode number space was compressed to 32-bits, and
so overlaps occur.This patch:
Make filldir_t take a 64-bit inode number and struct kstat carry a 64-bit
inode number so that 64-bit inode numbers can be passed back to userspace.The stat functions then returns the full 64-bit inode number where
available and where possible. If it is not possible to represent the inode
number supplied by the filesystem in the field provided by userspace, then
error EOVERFLOW will be issued.Similarly, the getdents/readdir functions now pass the full 64-bit inode
number to userspace where possible, returning EOVERFLOW instead when a
directory entry is encountered that can't be properly represented.Note that this means that some inodes will not be stat'able on a 32-bit
system with old libraries where they were before - but it does mean that
there will be no ambiguity over what a 32-bit inode number refers to.Note similarly that directory scans may be cut short with an error on a
32-bit system with old libraries where the scan would work before for the
same reasons.It is judged unlikely that this situation will occur because modern glibc
uses 64-bit capable versions of stat and getdents class functions
exclusively, and that older systems are unlikely to encounter
unrepresentable inode numbers anyway.[akpm: alpha build fix]
Signed-off-by: David Howells
Cc: Trond Myklebust
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Oct, 2006
1 commit
-
Replace references to system_utsname to the per-process uts namespace
where appropriate. This includes things like uname.Changes: Per Eric Biederman's comments, use the per-process uts namespace
for ELF_PLATFORM, sunrpc, and parts of net/ipv4/ipconfig.c[jdike@addtoit.com: UML fix]
[clg@fr.ibm.com: cleanup]
[akpm@osdl.org: build fix]
Signed-off-by: Serge E. Hallyn
Cc: Kirill Korotaev
Cc: "Eric W. Biederman"
Cc: Herbert Poetzl
Cc: Andrey Savochkin
Signed-off-by: Cedric Le Goater
Cc: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Aug, 2006
1 commit
-
Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) and remove a
duplicate of the macro. Also remove some trailing whitespaces and needless
braces.Signed-off-by: Tobias Klauser
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Jun, 2006
1 commit
-
Give the statfs superblock operation a dentry pointer rather than a superblock
pointer.This complements the get_sb() patch. That reduced the significance of
sb->s_root, allowing NFS to place a fake root there. However, NFS does
require a dentry to use as a target for the statfs operation. This permits
the root in the vfsmount to be used instead.linux/mount.h has been added where necessary to make allyesconfig build
successfully.Interest has also been expressed for use with the FUSE and XFS filesystems.
Signed-off-by: David Howells
Acked-by: Al Viro
Cc: Nathan Scott
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Mar, 2006
1 commit
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Create compat_sys_adjtimex and use it an all appropriate places.
Signed-off-by: Stephen Rothwell
Cc: Arnd Bergmann
Acked-by: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Jan, 2006
1 commit
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Here is a series of patches which introduce in total 13 new system calls
which take a file descriptor/filename pair instead of a single file
name. These functions, openat etc, have been discussed on numerous
occasions. They are needed to implement race-free filesystem traversal,
they are necessary to implement a virtual per-thread current working
directory (think multi-threaded backup software), etc.We have in glibc today implementations of the interfaces which use the
/proc/self/fd magic. But this code is rather expensive. Here are some
results (similar to what Jim Meyering posted before).The test creates a deep directory hierarchy on a tmpfs filesystem. Then
rm -fr is used to remove all directories. Without syscall support I get
this:real 0m31.921s
user 0m0.688s
sys 0m31.234sWith syscall support the results are much better:
real 0m20.699s
user 0m0.536s
sys 0m20.149sThe interfaces are for obvious reasons currently not much used. But they'll
be used. coreutils (and Jeff's posixutils) are already using them.
Furthermore, code like ftw/fts in libc (maybe even glob) will also start using
them. I expect a patch to make follow soon. Every program which is walking
the filesystem tree will benefit.Signed-off-by: Ulrich Drepper
Signed-off-by: Alexey Dobriyan
Cc: Christoph Hellwig
Cc: Al Viro
Acked-by: Ingo Molnar
Cc: Michael Kerrisk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Sep, 2005
1 commit
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With the new fdtable locking rules, you have to protect fdtable with either
->file_lock or rcu_read_lock/unlock(). There are some places where we
aren't doing either. This patch fixes those places.Signed-off-by: Dipankar Sarma
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Sep, 2005
1 commit
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Use schedule_timeout_interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.Signed-off-by: Nishanth Aravamudan
Cc: Richard Henderson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
