From 3a2ca64496cc1c9aeab1076e06d092b3ec74a43d Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 1 Feb 2006 03:04:33 -0800 Subject: [PATCH] prototypes for *at functions & typo fix Here's the follow-up patch which introduces the prototypes for the new syscalls. There was also a typo in one of the new symbols. Signed-off-by: Ulrich Drepper Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/syscalls.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'include/linux/syscalls.h') diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e666d6070569..fdbd436b24cc 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -50,6 +50,8 @@ struct timezone; struct tms; struct utimbuf; struct mq_attr; +struct compat_stat; +struct compat_timeval; #include #include @@ -534,4 +536,35 @@ asmlinkage long sys_spu_run(int fd, __u32 __user *unpc, asmlinkage long sys_spu_create(const char __user *name, unsigned int flags, mode_t mode); +asmlinkage long sys_mknodat(int dfd, const char __user * filename, int mode, + unsigned dev); +asmlinkage long sys_mkdirat(int dfd, const char __user * pathname, int mode); +asmlinkage long sys_unlinkat(int dfd, const char __user * pathname, int flag); +asmlinkage long sys_symlinkat(const char __user * oldname, + int newdfd, const char __user * newname); +asmlinkage long sys_linkat(int olddfd, const char __user *oldname, + int newdfd, const char __user *newname); +asmlinkage long sys_renameat(int olddfd, const char __user * oldname, + int newdfd, const char __user * newname); +asmlinkage long sys_futimesat(int dfd, char __user *filename, + struct timeval __user *utimes); +asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode); +asmlinkage long sys_fchmodat(int dfd, const char __user * filename, + mode_t mode); +asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user, + gid_t group, int flag); +asmlinkage long sys_openat(int dfd, const char __user *filename, int flags, + int mode); +asmlinkage long sys_newfstatat(int dfd, char __user *filename, + struct stat __user *statbuf, int flag); +asmlinkage long sys_readlinkat(int dfd, const char __user *path, char __user *buf, + int bufsiz); +asmlinkage long compat_sys_futimesat(int dfd, char __user *filename, + struct compat_timeval __user *t); +asmlinkage long compat_sys_newfstatat(int dfd, char __user * filename, + struct compat_stat __user *statbuf, + int flag); +asmlinkage long compat_sys_openat(int dfd, const char __user *filename, + int flags, int mode); + #endif -- cgit v1.2.3-71-gd317 From 9ad11ab48b1ad618bf47076e9e579f267f5306c2 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Thu, 2 Feb 2006 16:11:51 +1100 Subject: [PATCH] compat: fix compat_sys_openat and friends Most of the 64 bit architectures will zero extend the first argument to compat_sys_{openat,newfstatat,futimesat} which will fail if the 32 bit syscall was passed AT_FDCWD (which is a small negative number). Declare the first argument to be an unsigned int which will force the correct sign extension when the internal functions are called in each case. Also, do some small white space cleanups in fs/compat.c. Signed-off-by: Stephen Rothwell Acked-by: David S. Miller Signed-off-by: Linus Torvalds --- fs/compat.c | 12 ++++++------ include/linux/syscalls.h | 6 +++--- 2 files changed, 9 insertions(+), 9 deletions(-) (limited to 'include/linux/syscalls.h') diff --git a/fs/compat.c b/fs/compat.c index cc58a20df57a..70c5af4cc270 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -73,17 +73,17 @@ asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __ return do_utimes(AT_FDCWD, filename, t ? tv : NULL); } -asmlinkage long compat_sys_futimesat(int dfd, char __user *filename, struct compat_timeval __user *t) +asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) { struct timeval tv[2]; - if (t) { + if (t) { if (get_user(tv[0].tv_sec, &t[0].tv_sec) || get_user(tv[0].tv_usec, &t[0].tv_usec) || get_user(tv[1].tv_sec, &t[1].tv_sec) || get_user(tv[1].tv_usec, &t[1].tv_usec)) - return -EFAULT; - } + return -EFAULT; + } return do_utimes(dfd, filename, t ? tv : NULL); } @@ -114,7 +114,7 @@ asmlinkage long compat_sys_newlstat(char __user * filename, return error; } -asmlinkage long compat_sys_newfstatat(int dfd, char __user *filename, +asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, struct compat_stat __user *statbuf, int flag) { struct kstat stat; @@ -1326,7 +1326,7 @@ compat_sys_open(const char __user *filename, int flags, int mode) * O_LARGEFILE flag. */ asmlinkage long -compat_sys_openat(int dfd, const char __user *filename, int flags, int mode) +compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) { return do_sys_open(dfd, filename, flags, mode); } diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index fdbd436b24cc..3877209d23c3 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -559,12 +559,12 @@ asmlinkage long sys_newfstatat(int dfd, char __user *filename, struct stat __user *statbuf, int flag); asmlinkage long sys_readlinkat(int dfd, const char __user *path, char __user *buf, int bufsiz); -asmlinkage long compat_sys_futimesat(int dfd, char __user *filename, +asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t); -asmlinkage long compat_sys_newfstatat(int dfd, char __user * filename, +asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user * filename, struct compat_stat __user *statbuf, int flag); -asmlinkage long compat_sys_openat(int dfd, const char __user *filename, +asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode); #endif -- cgit v1.2.3-71-gd317 From cff2b760096d1e6feaa31948e7af4abbefe47822 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sat, 11 Feb 2006 17:55:47 -0800 Subject: [PATCH] fstatat64 support The *at patches introduced fstatat and, due to inusfficient research, I used the newfstat functions generally as the guideline. The result is that on 32-bit platforms we don't have all the information needed to implement fstatat64. This patch modifies the code to pass up 64-bit information if __ARCH_WANT_STAT64 is defined. I renamed the syscall entry point to make this clear. Other archs will continue to use the existing code. On x86-64 the compat code is implemented using a new sys32_ function. this is what is done for the other stat syscalls as well. This patch might break some other archs (those which define __ARCH_WANT_STAT64 and which already wired up the syscall). Yet others might need changes to accomodate the compatibility mode. I really don't want to do that work because all this stat handling is a mess (more so in glibc, but the kernel is also affected). It should be done by the arch maintainers. I'll provide some stand-alone test shortly. Those who are eager could compile glibc and run 'make check' (no installation needed). The patch below has been tested on x86 and x86-64. Signed-off-by: Ulrich Drepper Cc: Christoph Hellwig Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/syscall_table.S | 2 +- arch/x86_64/ia32/ia32entry.S | 2 +- arch/x86_64/ia32/sys_ia32.c | 22 ++++++++++++++++++++++ fs/stat.c | 22 ++++++++++++++++++++++ include/asm-i386/unistd.h | 2 +- include/asm-x86_64/ia32_unistd.h | 2 +- include/linux/syscalls.h | 2 ++ 7 files changed, 50 insertions(+), 4 deletions(-) (limited to 'include/linux/syscalls.h') diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S index 5a8b3fb6d27b..ac687d00a1ce 100644 --- a/arch/i386/kernel/syscall_table.S +++ b/arch/i386/kernel/syscall_table.S @@ -299,7 +299,7 @@ ENTRY(sys_call_table) .long sys_mknodat .long sys_fchownat .long sys_futimesat - .long sys_newfstatat /* 300 */ + .long sys_fstatat64 /* 300 */ .long sys_unlinkat .long sys_renameat .long sys_linkat diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S index ada4535d0161..00dee176c08e 100644 --- a/arch/x86_64/ia32/ia32entry.S +++ b/arch/x86_64/ia32/ia32entry.S @@ -677,7 +677,7 @@ ia32_sys_call_table: .quad sys_mknodat .quad sys_fchownat .quad compat_sys_futimesat - .quad compat_sys_newfstatat /* 300 */ + .quad sys32_fstatat /* 300 */ .quad sys_unlinkat .quad sys_renameat .quad sys_linkat diff --git a/arch/x86_64/ia32/sys_ia32.c b/arch/x86_64/ia32/sys_ia32.c index 54481af5344a..2bc55af95419 100644 --- a/arch/x86_64/ia32/sys_ia32.c +++ b/arch/x86_64/ia32/sys_ia32.c @@ -180,6 +180,28 @@ sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf) return ret; } +asmlinkage long +sys32_fstatat(unsigned int dfd, char __user *filename, + struct stat64 __user* statbuf, int flag) +{ + struct kstat stat; + int error = -EINVAL; + + if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) + goto out; + + if (flag & AT_SYMLINK_NOFOLLOW) + error = vfs_lstat_fd(dfd, filename, &stat); + else + error = vfs_stat_fd(dfd, filename, &stat); + + if (!error) + error = cp_stat64(statbuf, &stat); + +out: + return error; +} + /* * Linux/i386 didn't use to be able to handle more than * 4 system call parameters, so these system calls used a memory diff --git a/fs/stat.c b/fs/stat.c index 24211b030f39..9948cc1685a4 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -261,6 +261,7 @@ asmlinkage long sys_newlstat(char __user *filename, struct stat __user *statbuf) return error; } +#ifndef __ARCH_WANT_STAT64 asmlinkage long sys_newfstatat(int dfd, char __user *filename, struct stat __user *statbuf, int flag) { @@ -281,6 +282,7 @@ asmlinkage long sys_newfstatat(int dfd, char __user *filename, out: return error; } +#endif asmlinkage long sys_newfstat(unsigned int fd, struct stat __user *statbuf) { @@ -395,6 +397,26 @@ asmlinkage long sys_fstat64(unsigned long fd, struct stat64 __user * statbuf) return error; } +asmlinkage long sys_fstatat64(int dfd, char __user *filename, + struct stat64 __user *statbuf, int flag) +{ + struct kstat stat; + int error = -EINVAL; + + if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) + goto out; + + if (flag & AT_SYMLINK_NOFOLLOW) + error = vfs_lstat_fd(dfd, filename, &stat); + else + error = vfs_stat_fd(dfd, filename, &stat); + + if (!error) + error = cp_new_stat64(&stat, statbuf); + +out: + return error; +} #endif /* __ARCH_WANT_STAT64 */ void inode_add_bytes(struct inode *inode, loff_t bytes) diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h index cf6f2cd9c514..dc81a55dd94d 100644 --- a/include/asm-i386/unistd.h +++ b/include/asm-i386/unistd.h @@ -305,7 +305,7 @@ #define __NR_mknodat 297 #define __NR_fchownat 298 #define __NR_futimesat 299 -#define __NR_newfstatat 300 +#define __NR_fstatat64 300 #define __NR_unlinkat 301 #define __NR_renameat 302 #define __NR_linkat 303 diff --git a/include/asm-x86_64/ia32_unistd.h b/include/asm-x86_64/ia32_unistd.h index 20468983d453..eeb2bcd635de 100644 --- a/include/asm-x86_64/ia32_unistd.h +++ b/include/asm-x86_64/ia32_unistd.h @@ -305,7 +305,7 @@ #define __NR_ia32_mknodat 297 #define __NR_ia32_fchownat 298 #define __NR_ia32_futimesat 299 -#define __NR_ia32_newfstatat 300 +#define __NR_ia32_fstatat64 300 #define __NR_ia32_unlinkat 301 #define __NR_ia32_renameat 302 #define __NR_ia32_linkat 303 diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 3877209d23c3..d73501ba7e44 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -557,6 +557,8 @@ asmlinkage long sys_openat(int dfd, const char __user *filename, int flags, int mode); asmlinkage long sys_newfstatat(int dfd, char __user *filename, struct stat __user *statbuf, int flag); +asmlinkage long sys_fstatat64(int dfd, char __user *filename, + struct stat64 __user *statbuf, int flag); asmlinkage long sys_readlinkat(int dfd, const char __user *path, char __user *buf, int bufsiz); asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, -- cgit v1.2.3-71-gd317