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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-24 02:50:11 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-24 02:50:11 (GMT) |
commit | 9e2d59ad580d590134285f361a0e80f0e98c0207 (patch) | |
tree | f3232be75781484193413f32ec82c21f6d8eb76e /fs | |
parent | 5ce1a70e2f00f0bce0cab57f798ca354b9496169 (diff) | |
parent | 235b80226b986dabcbba844968f7807866bd0bfe (diff) | |
download | linux-fsl-qoriq-9e2d59ad580d590134285f361a0e80f0e98c0207.tar.xz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal handling cleanups from Al Viro:
"This is the first pile; another one will come a bit later and will
contain SYSCALL_DEFINE-related patches.
- a bunch of signal-related syscalls (both native and compat)
unified.
- a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
(fixing several potential problems with missing argument
validation, while we are at it)
- a lot of now-pointless wrappers killed
- a couple of architectures (cris and hexagon) forgot to save
altstack settings into sigframe, even though they used the
(uninitialized) values in sigreturn; fixed.
- microblaze fixes for delivery of multiple signals arriving at once
- saner set of helpers for signal delivery introduced, several
architectures switched to using those."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
x86: convert to ksignal
sparc: convert to ksignal
arm: switch to struct ksignal * passing
alpha: pass k_sigaction and siginfo_t using ksignal pointer
burying unused conditionals
make do_sigaltstack() static
arm64: switch to generic old sigaction() (compat-only)
arm64: switch to generic compat rt_sigaction()
arm64: switch compat to generic old sigsuspend
arm64: switch to generic compat rt_sigqueueinfo()
arm64: switch to generic compat rt_sigpending()
arm64: switch to generic compat rt_sigprocmask()
arm64: switch to generic sigaltstack
sparc: switch to generic old sigsuspend
sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
sparc: kill sign-extending wrappers for native syscalls
kill sparc32_open()
sparc: switch to use of generic old sigaction
sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
mips: switch to generic sys_fork() and sys_clone()
...
Diffstat (limited to 'fs')
-rw-r--r-- | fs/compat.c | 52 | ||||
-rw-r--r-- | fs/timerfd.c | 85 |
2 files changed, 70 insertions, 67 deletions
diff --git a/fs/compat.c b/fs/compat.c index 015e1e1..fe40fde 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1278,8 +1278,7 @@ compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, * Exactly like fs/open.c:sys_open(), except that it doesn't set the * O_LARGEFILE flag. */ -asmlinkage long -compat_sys_open(const char __user *filename, int flags, umode_t mode) +COMPAT_SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, umode_t, mode) { return do_sys_open(AT_FDCWD, filename, flags, mode); } @@ -1288,8 +1287,7 @@ compat_sys_open(const char __user *filename, int flags, umode_t mode) * Exactly like fs/open.c:sys_openat(), except that it doesn't set the * O_LARGEFILE flag. */ -asmlinkage long -compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, umode_t mode) +COMPAT_SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags, umode_t, mode) { return do_sys_open(dfd, filename, flags, mode); } @@ -1739,55 +1737,13 @@ asmlinkage long compat_sys_signalfd(int ufd, } #endif /* CONFIG_SIGNALFD */ -#ifdef CONFIG_TIMERFD - -asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, - const struct compat_itimerspec __user *utmr, - struct compat_itimerspec __user *otmr) -{ - int error; - struct itimerspec t; - struct itimerspec __user *ut; - - if (get_compat_itimerspec(&t, utmr)) - return -EFAULT; - ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); - if (copy_to_user(&ut[0], &t, sizeof(t))) - return -EFAULT; - error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); - if (!error && otmr) - error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || - put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; - - return error; -} - -asmlinkage long compat_sys_timerfd_gettime(int ufd, - struct compat_itimerspec __user *otmr) -{ - int error; - struct itimerspec t; - struct itimerspec __user *ut; - - ut = compat_alloc_user_space(sizeof(struct itimerspec)); - error = sys_timerfd_gettime(ufd, ut); - if (!error) - error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || - put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; - - return error; -} - -#endif /* CONFIG_TIMERFD */ - #ifdef CONFIG_FHANDLE /* * Exactly like fs/open.c:sys_open_by_handle_at(), except that it * doesn't set the O_LARGEFILE flag. */ -asmlinkage long -compat_sys_open_by_handle_at(int mountdirfd, - struct file_handle __user *handle, int flags) +COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd, + struct file_handle __user *, handle, int, flags) { return do_handle_open(mountdirfd, handle, flags); } diff --git a/fs/timerfd.c b/fs/timerfd.c index d03822b..0e606b1 100644 --- a/fs/timerfd.c +++ b/fs/timerfd.c @@ -22,6 +22,7 @@ #include <linux/anon_inodes.h> #include <linux/timerfd.h> #include <linux/syscalls.h> +#include <linux/compat.h> #include <linux/rcupdate.h> struct timerfd_ctx { @@ -278,21 +279,17 @@ SYSCALL_DEFINE2(timerfd_create, int, clockid, int, flags) return ufd; } -SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags, - const struct itimerspec __user *, utmr, - struct itimerspec __user *, otmr) +static int do_timerfd_settime(int ufd, int flags, + const struct itimerspec *new, + struct itimerspec *old) { struct fd f; struct timerfd_ctx *ctx; - struct itimerspec ktmr, kotmr; int ret; - if (copy_from_user(&ktmr, utmr, sizeof(ktmr))) - return -EFAULT; - if ((flags & ~TFD_SETTIME_FLAGS) || - !timespec_valid(&ktmr.it_value) || - !timespec_valid(&ktmr.it_interval)) + !timespec_valid(&new->it_value) || + !timespec_valid(&new->it_interval)) return -EINVAL; ret = timerfd_fget(ufd, &f); @@ -323,27 +320,23 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags, if (ctx->expired && ctx->tintv.tv64) hrtimer_forward_now(&ctx->tmr, ctx->tintv); - kotmr.it_value = ktime_to_timespec(timerfd_get_remaining(ctx)); - kotmr.it_interval = ktime_to_timespec(ctx->tintv); + old->it_value = ktime_to_timespec(timerfd_get_remaining(ctx)); + old->it_interval = ktime_to_timespec(ctx->tintv); /* * Re-program the timer to the new value ... */ - ret = timerfd_setup(ctx, flags, &ktmr); + ret = timerfd_setup(ctx, flags, new); spin_unlock_irq(&ctx->wqh.lock); fdput(f); - if (otmr && copy_to_user(otmr, &kotmr, sizeof(kotmr))) - return -EFAULT; - return ret; } -SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr) +static int do_timerfd_gettime(int ufd, struct itimerspec *t) { struct fd f; struct timerfd_ctx *ctx; - struct itimerspec kotmr; int ret = timerfd_fget(ufd, &f); if (ret) return ret; @@ -356,11 +349,65 @@ SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr) hrtimer_forward_now(&ctx->tmr, ctx->tintv) - 1; hrtimer_restart(&ctx->tmr); } - kotmr.it_value = ktime_to_timespec(timerfd_get_remaining(ctx)); - kotmr.it_interval = ktime_to_timespec(ctx->tintv); + t->it_value = ktime_to_timespec(timerfd_get_remaining(ctx)); + t->it_interval = ktime_to_timespec(ctx->tintv); spin_unlock_irq(&ctx->wqh.lock); fdput(f); + return 0; +} + +SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags, + const struct itimerspec __user *, utmr, + struct itimerspec __user *, otmr) +{ + struct itimerspec new, old; + int ret; + + if (copy_from_user(&new, utmr, sizeof(new))) + return -EFAULT; + ret = do_timerfd_settime(ufd, flags, &new, &old); + if (ret) + return ret; + if (otmr && copy_to_user(otmr, &old, sizeof(old))) + return -EFAULT; + + return ret; +} +SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr) +{ + struct itimerspec kotmr; + int ret = do_timerfd_gettime(ufd, &kotmr); + if (ret) + return ret; return copy_to_user(otmr, &kotmr, sizeof(kotmr)) ? -EFAULT: 0; } +#ifdef COMPAT +COMPAT_SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags, + const struct itimerspec __user *, utmr, + struct itimerspec __user *, otmr) +{ + struct itimerspec new, old; + int ret; + + if (get_compat_itimerspec(&new, utmr)) + return -EFAULT; + ret = do_timerfd_settime(ufd, flags, &new, &old); + if (ret) + return ret; + if (otmr && put_compat_itimerspec(otmr, &old)) + return -EFAULT; + return ret; +} + +COMPAT_SYSCALL_DEFINE2(timerfd_gettime, int, ufd, + struct itimerspec __user *, otmr) +{ + struct itimerspec kotmr; + int ret = do_timerfd_gettime(ufd, &kotmr); + if (ret) + return ret; + return put_compat_itimerspec(otmr, &t) ? -EFAULT: 0; +} +#endif |