From 298d0e3129c0b5137f4989275b13fe30d0733c4d Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Wed, 28 Feb 2018 15:37:17 -0300 Subject: Consolidate Linux getdents{64} implementation This patch consolidates Linux getdents{64} implementation on just the default sysdeps/unix/sysv/linux/getdents{64}{_r}.c ones. Although this symbol is used only internally, the non-LFS version still need to be build due the non-LFS getdirentries which requires its semantic. The non-LFS default implementation now uses the wordsize-32 as base which uses getdents64 syscall plus adjustment for overflow (it allows to use the same code for architectures that does not support non-LFS getdents syscall). It has two main differences to wordsize-32 one: - DIRENT_SET_DP_INO is added to handle alpha requirement to zero the padding. - alloca is removed by allocating a bounded temporary buffer (it increases stack usage by roughly 276 bytes). The default implementation handle the Linux requirements: * getdents is only built for _DIRENT_MATCHES_DIRENT64 being 0. * getdents64 is always built and aliased to getdents for ABIs that define _DIRENT_MATCHES_DIRENT64 to 1. * A compat symbol is added for getdents64 for ABI that used to export the old non-LFS version. Checked on aarch64-linux-gnu, x86_64-linux-gnu, i686-linux-gnu, sparcv9-linux-gnu, sparc64-linux-gnu, powerpc-linux-gnu, and powerpc64le-linux-gnu. * sysdeps/unix/sysv/linux/alpha/getdents.c: Add comments with alpha requirements. (_DIRENT_MATCHES_DIRENT64): Undef * sysdeps/unix/sysv/linux/alpha/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/arm/getdents64.c: Remove file. * sysdeps/unix/sysv/linux/generic/getdents.c: Likewise. * sysdeps/unix/sysv/linux/generic/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/getdents.c: Likewise. * sysdeps/unix/sysv/linux/getdents.c: Simplify implementation by use getdents64 syscalls as base. * sysdeps/unix/sysv/linux/getdents64.c: Likewise and add compatibility symbol if required. * sysdeps/unix/sysv/linux/hppa/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/i386/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/m68k/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/getdents.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/getdents64.c: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c (__get_clockfreq_via_proc_openprom): Use __getdents64. * sysdeps/unix/sysv/linux/mips/mips64/getdents64.c: New file. --- sysdeps/unix/sysv/linux/alpha/getdents.c | 8 + sysdeps/unix/sysv/linux/alpha/getdents64.c | 9 + sysdeps/unix/sysv/linux/arm/getdents64.c | 1 - sysdeps/unix/sysv/linux/generic/getdents.c | 1 - sysdeps/unix/sysv/linux/generic/getdents64.c | 37 --- .../unix/sysv/linux/generic/wordsize-32/getdents.c | 115 -------- sysdeps/unix/sysv/linux/getdents.c | 324 ++++++--------------- sysdeps/unix/sysv/linux/getdents64.c | 79 ++++- sysdeps/unix/sysv/linux/hppa/getdents64.c | 1 - sysdeps/unix/sysv/linux/i386/getdents64.c | 39 --- sysdeps/unix/sysv/linux/m68k/getdents64.c | 1 - sysdeps/unix/sysv/linux/mips/mips64/getdents64.c | 110 +++++++ sysdeps/unix/sysv/linux/powerpc/getdents64.c | 1 - sysdeps/unix/sysv/linux/s390/s390-32/getdents64.c | 1 - sysdeps/unix/sysv/linux/sparc/sparc32/getdents64.c | 1 - .../unix/sysv/linux/sparc/sparc64/get_clockfreq.c | 8 +- sysdeps/unix/sysv/linux/wordsize-64/getdents.c | 4 - sysdeps/unix/sysv/linux/wordsize-64/getdents64.c | 1 - 18 files changed, 291 insertions(+), 450 deletions(-) delete mode 100644 sysdeps/unix/sysv/linux/arm/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/generic/getdents.c delete mode 100644 sysdeps/unix/sysv/linux/generic/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/generic/wordsize-32/getdents.c delete mode 100644 sysdeps/unix/sysv/linux/hppa/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/i386/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/m68k/getdents64.c create mode 100644 sysdeps/unix/sysv/linux/mips/mips64/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/powerpc/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/s390/s390-32/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/sparc/sparc32/getdents64.c delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/getdents.c delete mode 100644 sysdeps/unix/sysv/linux/wordsize-64/getdents64.c (limited to 'sysdeps/unix') diff --git a/sysdeps/unix/sysv/linux/alpha/getdents.c b/sysdeps/unix/sysv/linux/alpha/getdents.c index dfecfef924..64ccf86c71 100644 --- a/sysdeps/unix/sysv/linux/alpha/getdents.c +++ b/sysdeps/unix/sysv/linux/alpha/getdents.c @@ -1,3 +1,11 @@ +/* Although Alpha defines _DIRENT_MATCHES_DIRENT64, 'struct dirent' and + 'struct dirent64' have slight different internal layout with d_ino + being a __ino_t on non-LFS version with an extra __pad field which should + be zeroed. */ + +#include +#undef _DIRENT_MATCHES_DIRENT64 +#define _DIRENT_MATCHES_DIRENT64 0 #define DIRENT_SET_DP_INO(dp, value) \ do { (dp)->d_ino = (value); (dp)->__pad = 0; } while (0) #include diff --git a/sysdeps/unix/sysv/linux/alpha/getdents64.c b/sysdeps/unix/sysv/linux/alpha/getdents64.c index 50f1368b74..940897de40 100644 --- a/sysdeps/unix/sysv/linux/alpha/getdents64.c +++ b/sysdeps/unix/sysv/linux/alpha/getdents64.c @@ -1 +1,10 @@ +/* Although Alpha defines _DIRENT_MATCHES_DIRENT64, 'struct dirent' and + 'struct dirent64' have slight different internal layout with d_ino + being a __ino_t on non-LFS version with an extra __pad field which should + be zeroed. */ + +#include +/* It suppresses the __getdents64 to __getdents alias. */ +#undef _DIRENT_MATCHES_DIRENT64 +#define _DIRENT_MATCHES_DIRENT64 0 #include diff --git a/sysdeps/unix/sysv/linux/arm/getdents64.c b/sysdeps/unix/sysv/linux/arm/getdents64.c deleted file mode 100644 index 0c75fb5a06..0000000000 --- a/sysdeps/unix/sysv/linux/arm/getdents64.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/unix/sysv/linux/generic/getdents.c b/sysdeps/unix/sysv/linux/generic/getdents.c deleted file mode 100644 index 14dbbc71a0..0000000000 --- a/sysdeps/unix/sysv/linux/generic/getdents.c +++ /dev/null @@ -1 +0,0 @@ -/* Defined in getdents64.c */ diff --git a/sysdeps/unix/sysv/linux/generic/getdents64.c b/sysdeps/unix/sysv/linux/generic/getdents64.c deleted file mode 100644 index 0f876b8172..0000000000 --- a/sysdeps/unix/sysv/linux/generic/getdents64.c +++ /dev/null @@ -1,37 +0,0 @@ -/* Copyright (C) 2011-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf , 2011. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - . */ - -#include -#include -#include -#include -#include - -#include -#include - -/* The kernel struct linux_dirent64 matches the 'struct getdents64' type. */ -ssize_t -__getdents64 (int fd, char *buf, size_t nbytes) -{ - return INLINE_SYSCALL (getdents64, 3, fd, buf, nbytes); -} - -#if __WORDSIZE == 64 -strong_alias (__getdents64, __getdents) -#endif diff --git a/sysdeps/unix/sysv/linux/generic/wordsize-32/getdents.c b/sysdeps/unix/sysv/linux/generic/wordsize-32/getdents.c deleted file mode 100644 index 7158fd1752..0000000000 --- a/sysdeps/unix/sysv/linux/generic/wordsize-32/getdents.c +++ /dev/null @@ -1,115 +0,0 @@ -/* Copyright (C) 1993-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Simplified from sysdeps/unix/sysv/linux/getdents.c. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - . */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -/* Pack the dirent64 struct down into 32-bit offset/inode fields, and - ensure that no overflow occurs. */ -ssize_t -__getdents (int fd, char *buf, size_t nbytes) -{ - union - { - struct dirent64 k; /* Kernel structure. */ - struct dirent u; - char b[1]; - } *kbuf = (void *) buf, *outp, *inp; - size_t kbytes = nbytes; - off64_t last_offset = -1; - ssize_t retval; - - const size_t size_diff = (offsetof (struct dirent64, d_name) - - offsetof (struct dirent, d_name)); - if (nbytes <= sizeof (struct dirent)) - { - kbytes = nbytes + offsetof (struct dirent64, d_name) - - offsetof (struct dirent, d_name); - kbuf = __alloca(kbytes); - } - - retval = INLINE_SYSCALL (getdents64, 3, fd, kbuf, kbytes); - if (retval == -1) - return -1; - - /* These two pointers might alias the same memory buffer. - Standard C requires that we always use the same type for them, - so we must use the union type. */ - inp = kbuf; - outp = (void *) buf; - - while (&inp->b < &kbuf->b + retval) - { - const size_t alignment = __alignof__ (struct dirent); - /* Since inp->k.d_reclen is already aligned for the kernel - structure this may compute a value that is bigger - than necessary. */ - size_t old_reclen = inp->k.d_reclen; - size_t new_reclen = ((old_reclen - size_diff + alignment - 1) - & ~(alignment - 1)); - - /* Copy the data out of the old structure into temporary space. - Then copy the name, which may overlap if BUF == KBUF. */ - const uint64_t d_ino = inp->k.d_ino; - const int64_t d_off = inp->k.d_off; - const uint8_t d_type = inp->k.d_type; - - memmove (outp->u.d_name, inp->k.d_name, - old_reclen - offsetof (struct dirent64, d_name)); - - /* Now we have copied the data from INP and access only OUTP. */ - - outp->u.d_ino = d_ino; - outp->u.d_off = d_off; - if ((sizeof (outp->u.d_ino) != sizeof (inp->k.d_ino) - && outp->u.d_ino != d_ino) - || (sizeof (outp->u.d_off) != sizeof (inp->k.d_off) - && outp->u.d_off != d_off)) - { - /* Overflow. If there was at least one entry before this one, - return them without error, otherwise signal overflow. */ - if (last_offset != -1) - { - __lseek64 (fd, last_offset, SEEK_SET); - return outp->b - buf; - } - __set_errno (EOVERFLOW); - return -1; - } - - last_offset = d_off; - outp->u.d_reclen = new_reclen; - outp->u.d_type = d_type; - - inp = (void *) inp + old_reclen; - outp = (void *) outp + new_reclen; - } - - return outp->b - buf; -} diff --git a/sysdeps/unix/sysv/linux/getdents.c b/sysdeps/unix/sysv/linux/getdents.c index 591ce67196..6d09a5be70 100644 --- a/sysdeps/unix/sysv/linux/getdents.c +++ b/sysdeps/unix/sysv/linux/getdents.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1993-2018 Free Software Foundation, Inc. +/* Get directory entries. Linux non-LFS version. + Copyright (C) 1993-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -12,260 +13,103 @@ Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see + License along with the GNU C Library. If not, see . */ -#include -#include -#include #include -#include -#include -#include -#include -#include -#include -#include -#include +#if !_DIRENT_MATCHES_DIRENT64 -#include +# include +# include +# include -#include +# ifndef DIRENT_SET_DP_INO +# define DIRENT_SET_DP_INO(dp, value) (dp)->d_ino = (value) +# endif -/* For Linux we need a special version of this file since the - definition of `struct dirent' is not the same for the kernel and - the libc. There is one additional field which might be introduced - in the kernel structure in the future. - - Here is the kernel definition of `struct dirent' as of 2.1.20: */ - -struct kernel_dirent - { - long int d_ino; - __kernel_off_t d_off; - unsigned short int d_reclen; - char d_name[256]; - }; - -struct kernel_dirent64 - { - uint64_t d_ino; - int64_t d_off; - unsigned short int d_reclen; - unsigned char d_type; - char d_name[256]; - }; - -#ifndef __GETDENTS -# define __GETDENTS __getdents -#endif -#ifndef DIRENT_TYPE -# define DIRENT_TYPE struct dirent -#endif -#ifndef DIRENT_SET_DP_INO -# define DIRENT_SET_DP_INO(dp, value) (dp)->d_ino = (value) -#endif - -/* The problem here is that we cannot simply read the next NBYTES - bytes. We need to take the additional field into account. We use - some heuristic. Assuming the directory contains names with 14 - characters on average we can compute an estimated number of entries - which fit in the buffer. Taking this number allows us to specify a - reasonable number of bytes to read. If we should be wrong, we can - reset the file descriptor. In practice the kernel is limiting the - amount of data returned much more then the reduced buffer size. */ +/* Pack the dirent64 struct down into 32-bit offset/inode fields, and + ensure that no overflow occurs. */ ssize_t -__GETDENTS (int fd, char *buf, size_t nbytes) +__getdents (int fd, char *buf, size_t nbytes) { + union + { + /* For !_DIRENT_MATCHES_DIRENT64 kernel 'linux_dirent64' has the same + layout of 'struct dirent64'. */ + struct dirent64 k; + struct dirent u; + char b[1]; + } *kbuf = (void *) buf, *outp, *inp; + size_t kbytes = nbytes; + off64_t last_offset = -1; ssize_t retval; - /* The d_ino and d_off fields in kernel_dirent and dirent must have - the same sizes and alignments. */ - if (sizeof (DIRENT_TYPE) == sizeof (struct dirent) - && (sizeof (((struct kernel_dirent *) 0)->d_ino) - == sizeof (((struct dirent *) 0)->d_ino)) - && (sizeof (((struct kernel_dirent *) 0)->d_off) - == sizeof (((struct dirent *) 0)->d_off)) - && (offsetof (struct kernel_dirent, d_off) - == offsetof (struct dirent, d_off)) - && (offsetof (struct kernel_dirent, d_reclen) - == offsetof (struct dirent, d_reclen))) - { - retval = INLINE_SYSCALL (getdents, 3, fd, buf, nbytes); +# define size_diff (offsetof (struct dirent64, d_name) \ + - offsetof (struct dirent, d_name)) + char kbuftmp[sizeof (struct dirent) + size_diff]; + if (nbytes <= sizeof (struct dirent)) + kbuf = (void*) kbuftmp; - /* The kernel added the d_type value after the name. Change - this now. */ - if (retval != -1) - { - union - { - struct kernel_dirent k; - struct dirent u; - } *kbuf = (void *) buf; + retval = INLINE_SYSCALL_CALL (getdents64, fd, kbuf, kbytes); + if (retval == -1) + return -1; - while ((char *) kbuf < buf + retval) - { - char d_type = *((char *) kbuf + kbuf->k.d_reclen - 1); - memmove (kbuf->u.d_name, kbuf->k.d_name, - strlen (kbuf->k.d_name) + 1); - kbuf->u.d_type = d_type; + /* These two pointers might alias the same memory buffer. + Standard C requires that we always use the same type for them, + so we must use the union type. */ + inp = kbuf; + outp = (void *) buf; - kbuf = (void *) ((char *) kbuf + kbuf->k.d_reclen); - } - } - - return retval; - } - - off64_t last_offset = -1; - -#ifdef __NR_getdents64 - { - union + while (&inp->b < &kbuf->b + retval) { - struct kernel_dirent64 k; - DIRENT_TYPE u; - char b[1]; - } *kbuf = (void *) buf, *outp, *inp; - size_t kbytes = nbytes; - if (offsetof (DIRENT_TYPE, d_name) - < offsetof (struct kernel_dirent64, d_name) - && nbytes <= sizeof (DIRENT_TYPE)) - { - kbytes = (nbytes + offsetof (struct kernel_dirent64, d_name) - - offsetof (DIRENT_TYPE, d_name)); - kbuf = __alloca(kbytes); - } - retval = INLINE_SYSCALL (getdents64, 3, fd, kbuf, kbytes); - const size_t size_diff = (offsetof (struct kernel_dirent64, d_name) - - offsetof (DIRENT_TYPE, d_name)); - - /* Return the error if encountered. */ - if (retval == -1) - return -1; - - /* If the structure returned by the kernel is identical to what we - need, don't do any conversions. */ - if (offsetof (DIRENT_TYPE, d_name) - == offsetof (struct kernel_dirent64, d_name) - && sizeof (outp->u.d_ino) == sizeof (inp->k.d_ino) - && sizeof (outp->u.d_off) == sizeof (inp->k.d_off)) - return retval; - - /* These two pointers might alias the same memory buffer. - Standard C requires that we always use the same type for them, - so we must use the union type. */ - inp = kbuf; - outp = (void *) buf; - - while (&inp->b < &kbuf->b + retval) - { - const size_t alignment = __alignof__ (DIRENT_TYPE); - /* Since inp->k.d_reclen is already aligned for the kernel - structure this may compute a value that is bigger - than necessary. */ - size_t old_reclen = inp->k.d_reclen; - size_t new_reclen = ((old_reclen - size_diff + alignment - 1) - & ~(alignment - 1)); - - /* Copy the data out of the old structure into temporary space. - Then copy the name, which may overlap if BUF == KBUF. */ - const uint64_t d_ino = inp->k.d_ino; - const int64_t d_off = inp->k.d_off; - const uint8_t d_type = inp->k.d_type; - - memmove (outp->u.d_name, inp->k.d_name, - old_reclen - offsetof (struct kernel_dirent64, d_name)); - - /* Now we have copied the data from INP and access only OUTP. */ - - DIRENT_SET_DP_INO (&outp->u, d_ino); - outp->u.d_off = d_off; - if ((sizeof (outp->u.d_ino) != sizeof (inp->k.d_ino) - && outp->u.d_ino != d_ino) - || (sizeof (outp->u.d_off) != sizeof (inp->k.d_off) - && outp->u.d_off != d_off)) - { - /* Overflow. If there was at least one entry - before this one, return them without error, - otherwise signal overflow. */ - if (last_offset != -1) - { - __lseek64 (fd, last_offset, SEEK_SET); - return outp->b - buf; - } - __set_errno (EOVERFLOW); - return -1; - } - - last_offset = d_off; - outp->u.d_reclen = new_reclen; - outp->u.d_type = d_type; - - inp = (void *) inp + old_reclen; - outp = (void *) outp + new_reclen; - } - - return outp->b - buf; - } -#endif - { - size_t red_nbytes; - struct kernel_dirent *skdp, *kdp; - const size_t size_diff = (offsetof (DIRENT_TYPE, d_name) - - offsetof (struct kernel_dirent, d_name)); - - red_nbytes = MIN (nbytes - - ((nbytes / (offsetof (DIRENT_TYPE, d_name) + 14)) - * size_diff), - nbytes - size_diff); - - skdp = kdp = __alloca (red_nbytes); - - retval = INLINE_SYSCALL (getdents, 3, fd, (char *) kdp, red_nbytes); - - if (retval == -1) - return -1; - - DIRENT_TYPE *dp = (DIRENT_TYPE *) buf; - while ((char *) kdp < (char *) skdp + retval) - { - const size_t alignment = __alignof__ (DIRENT_TYPE); - /* Since kdp->d_reclen is already aligned for the kernel structure - this may compute a value that is bigger than necessary. */ - size_t new_reclen = ((kdp->d_reclen + size_diff + alignment - 1) - & ~(alignment - 1)); - if ((char *) dp + new_reclen > buf + nbytes) - { - /* Our heuristic failed. We read too many entries. Reset - the stream. */ - assert (last_offset != -1); - __lseek64 (fd, last_offset, SEEK_SET); - - if ((char *) dp == buf) - { - /* The buffer the user passed in is too small to hold even - one entry. */ - __set_errno (EINVAL); - return -1; - } - - break; - } + const size_t alignment = _Alignof (struct dirent); + /* Since inp->k.d_reclen is already aligned for the kernel + structure this may compute a value that is bigger + than necessary. */ + size_t old_reclen = inp->k.d_reclen; + size_t new_reclen = ((old_reclen - size_diff + alignment - 1) + & ~(alignment - 1)); + + /* Copy the data out of the old structure into temporary space. + Then copy the name, which may overlap if BUF == KBUF. */ + const uint64_t d_ino = inp->k.d_ino; + const int64_t d_off = inp->k.d_off; + const uint8_t d_type = inp->k.d_type; + + memmove (outp->u.d_name, inp->k.d_name, + old_reclen - offsetof (struct dirent64, d_name)); + + /* Now we have copied the data from INP and access only OUTP. */ + + DIRENT_SET_DP_INO (&outp->u, d_ino); + outp->u.d_off = d_off; + if ((sizeof (outp->u.d_ino) != sizeof (inp->k.d_ino) + && outp->u.d_ino != d_ino) + || (sizeof (outp->u.d_off) != sizeof (inp->k.d_off) + && outp->u.d_off != d_off)) + { + /* Overflow. If there was at least one entry before this one, + return them without error, otherwise signal overflow. */ + if (last_offset != -1) + { + __lseek64 (fd, last_offset, SEEK_SET); + return outp->b - buf; + } + return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW); + } + + last_offset = d_off; + outp->u.d_reclen = new_reclen; + outp->u.d_type = d_type; + + inp = (void *) inp + old_reclen; + outp = (void *) outp + new_reclen; + } - last_offset = kdp->d_off; - DIRENT_SET_DP_INO(dp, kdp->d_ino); - dp->d_off = kdp->d_off; - dp->d_reclen = new_reclen; - dp->d_type = *((char *) kdp + kdp->d_reclen - 1); - memcpy (dp->d_name, kdp->d_name, - kdp->d_reclen - offsetof (struct kernel_dirent, d_name)); + return outp->b - buf; +} - dp = (DIRENT_TYPE *) ((char *) dp + new_reclen); - kdp = (struct kernel_dirent *) (((char *) kdp) + kdp->d_reclen); - } +# undef DIRENT_SET_DP_INO - return (char *) dp - buf; - } -} +#endif /* _DIRENT_MATCHES_DIRENT64 */ diff --git a/sysdeps/unix/sysv/linux/getdents64.c b/sysdeps/unix/sysv/linux/getdents64.c index 805917e274..3bde0cf4f0 100644 --- a/sysdeps/unix/sysv/linux/getdents64.c +++ b/sysdeps/unix/sysv/linux/getdents64.c @@ -1,3 +1,76 @@ -#define __GETDENTS __getdents64 -#define DIRENT_TYPE struct dirent64 -#include +/* Get directory entries. Linux LFS version. + Copyright (C) 1997-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#include +#include +#include + +/* The kernel struct linux_dirent64 matches the 'struct getdents64' type. */ +ssize_t +__getdents64 (int fd, char *buf, size_t nbytes) +{ + return INLINE_SYSCALL_CALL (getdents64, fd, buf, nbytes); +} + +#if _DIRENT_MATCHES_DIRENT64 +strong_alias (__getdents64, __getdents) +#else +# include + +# if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2) +# include + +/* kernel definition of as of 3.2. */ +struct compat_linux_dirent +{ + /* Both d_ino and d_off are compat_ulong_t which are defined in all + architectures as 'u32'. */ + uint32_t d_ino; + uint32_t d_off; + unsigned short d_reclen; + char d_name[1]; +}; + +ssize_t +__old_getdents64 (int fd, char *buf, size_t nbytes) +{ + ssize_t retval = INLINE_SYSCALL_CALL (getdents, fd, buf, nbytes); + + /* The kernel added the d_type value after the name. Change this now. */ + if (retval != -1) + { + union + { + struct compat_linux_dirent k; + struct dirent u; + } *kbuf = (void *) buf; + + while ((char *) kbuf < buf + retval) + { + char d_type = *((char *) kbuf + kbuf->k.d_reclen - 1); + memmove (kbuf->u.d_name, kbuf->k.d_name, + strlen (kbuf->k.d_name) + 1); + kbuf->u.d_type = d_type; + + kbuf = (void *) ((char *) kbuf + kbuf->k.d_reclen); + } + } + return retval; +} +# endif /* SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2) */ +#endif /* _DIRENT_MATCHES_DIRENT64 */ diff --git a/sysdeps/unix/sysv/linux/hppa/getdents64.c b/sysdeps/unix/sysv/linux/hppa/getdents64.c deleted file mode 100644 index 0c75fb5a06..0000000000 --- a/sysdeps/unix/sysv/linux/hppa/getdents64.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/unix/sysv/linux/i386/getdents64.c b/sysdeps/unix/sysv/linux/i386/getdents64.c deleted file mode 100644 index 0a2c194eff..0000000000 --- a/sysdeps/unix/sysv/linux/i386/getdents64.c +++ /dev/null @@ -1,39 +0,0 @@ -/* Copyright (C) 2000-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#define __GETDENTS __getdents64 -#define DIRENT_TYPE struct dirent64 - -#include - -#include - -#undef __READDIR -#undef __GETDENTS -#undef DIRENT_TYPE - -#if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2) - -#include - -#define __GETDENTS __old_getdents64 -#define DIRENT_TYPE struct __old_dirent64 -#define kernel_dirent old_kernel_dirent -#define kernel_dirent64 old_kernel_dirent64 - -#include -#endif diff --git a/sysdeps/unix/sysv/linux/m68k/getdents64.c b/sysdeps/unix/sysv/linux/m68k/getdents64.c deleted file mode 100644 index 0c75fb5a06..0000000000 --- a/sysdeps/unix/sysv/linux/m68k/getdents64.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/unix/sysv/linux/mips/mips64/getdents64.c b/sysdeps/unix/sysv/linux/mips/mips64/getdents64.c new file mode 100644 index 0000000000..63afb2667e --- /dev/null +++ b/sysdeps/unix/sysv/linux/mips/mips64/getdents64.c @@ -0,0 +1,110 @@ +/* Get directory entries. Linux/MIPSn64 LFS version. + Copyright (C) 2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#include +#include +#include +#include +#include +#include +#include + +ssize_t +__getdents64 (int fd, char *buf, size_t nbytes) +{ +#ifdef __NR_getdents64 + ssize_t ret = INLINE_SYSCALL_CALL (getdents64, fd, buf, nbytes); + if (ret != -1) + return ret; +#endif + + /* Unfortunately getdents64 was only wire-up for MIPS n64 on Linux 3.10. + If syscall is not available it need to fallback to non-LFS one. */ + + struct kernel_dirent + { + unsigned long d_ino; + unsigned long d_off; + unsigned short int d_reclen; + char d_name[256]; + }; + + const size_t size_diff = (offsetof (struct dirent64, d_name) + - offsetof (struct kernel_dirent, d_name)); + + size_t red_nbytes = MIN (nbytes + - ((nbytes / (offsetof (struct dirent64, d_name) + + 14)) * size_diff), + nbytes - size_diff); + + struct scratch_buffer tmpbuf; + scratch_buffer_init (&tmpbuf); + if (!scratch_buffer_set_array_size (&tmpbuf, red_nbytes, sizeof (uint8_t))) + INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOMEM); + + struct kernel_dirent *skdp, *kdp; + skdp = kdp = tmpbuf.data; + + ssize_t retval = INLINE_SYSCALL_CALL (getdents, fd, kdp, red_nbytes); + if (retval == -1) + { + scratch_buffer_free (&tmpbuf); + return -1; + } + + off64_t last_offset = -1; + struct dirent64 *dp = (struct dirent64 *) buf; + while ((char *) kdp < (char *) skdp + retval) + { + const size_t alignment = _Alignof (struct dirent64); + /* Since kdp->d_reclen is already aligned for the kernel structure + this may compute a value that is bigger than necessary. */ + size_t new_reclen = ((kdp->d_reclen + size_diff + alignment - 1) + & ~(alignment - 1)); + if ((char *) dp + new_reclen > buf + nbytes) + { + /* Our heuristic failed. We read too many entries. Reset + the stream. */ + assert (last_offset != -1); + __lseek64 (fd, last_offset, SEEK_SET); + + if ((char *) dp == buf) + { + scratch_buffer_free (&tmpbuf); + return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL); + } + + break; + } + + last_offset = kdp->d_off; + dp->d_ino = kdp->d_ino; + dp->d_off = kdp->d_off; + dp->d_reclen = new_reclen; + dp->d_type = *((char *) kdp + kdp->d_reclen - 1); + memcpy (dp->d_name, kdp->d_name, + kdp->d_reclen - offsetof (struct kernel_dirent, d_name)); + + dp = (struct dirent64 *) ((char *) dp + new_reclen); + kdp = (struct kernel_dirent *) (((char *) kdp) + kdp->d_reclen); + } + + scratch_buffer_free (&tmpbuf); + return (char *) dp - buf; +} +strong_alias (__getdents64, __getdents) diff --git a/sysdeps/unix/sysv/linux/powerpc/getdents64.c b/sysdeps/unix/sysv/linux/powerpc/getdents64.c deleted file mode 100644 index 0c75fb5a06..0000000000 --- a/sysdeps/unix/sysv/linux/powerpc/getdents64.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/getdents64.c b/sysdeps/unix/sysv/linux/s390/s390-32/getdents64.c deleted file mode 100644 index 0c75fb5a06..0000000000 --- a/sysdeps/unix/sysv/linux/s390/s390-32/getdents64.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/getdents64.c b/sysdeps/unix/sysv/linux/sparc/sparc32/getdents64.c deleted file mode 100644 index 0c75fb5a06..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/getdents64.c +++ /dev/null @@ -1 +0,0 @@ -#include diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c b/sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c index c54d30138c..6838a77a76 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c @@ -90,12 +90,12 @@ __get_clockfreq_via_proc_openprom (void) if (obp_fd != -1) { unsigned long int buf[4096 / sizeof (unsigned long int)]; - struct dirent *dirp = (struct dirent *) buf; + struct dirent64 *dirp = (struct dirent64 *) buf; ssize_t len; - while ((len = __getdents (obp_fd, (char *) dirp, sizeof (buf))) > 0) + while ((len = __getdents64 (obp_fd, (char *) dirp, sizeof (buf))) > 0) { - struct dirent *this_dirp = dirp; + struct dirent64 *this_dirp = dirp; while (len > 0) { @@ -140,7 +140,7 @@ __get_clockfreq_via_proc_openprom (void) break; len -= this_dirp->d_reclen; - this_dirp = (struct dirent *) + this_dirp = (struct dirent64 *) ((char *) this_dirp + this_dirp->d_reclen); } if (result != 0) diff --git a/sysdeps/unix/sysv/linux/wordsize-64/getdents.c b/sysdeps/unix/sysv/linux/wordsize-64/getdents.c deleted file mode 100644 index 5ea4c572a3..0000000000 --- a/sysdeps/unix/sysv/linux/wordsize-64/getdents.c +++ /dev/null @@ -1,4 +0,0 @@ -#define __getdents64 __no___getdents64_decl -#include -#undef __getdents64 -weak_alias (__getdents, __getdents64); diff --git a/sysdeps/unix/sysv/linux/wordsize-64/getdents64.c b/sysdeps/unix/sysv/linux/wordsize-64/getdents64.c deleted file mode 100644 index 0df2c8f4c6..0000000000 --- a/sysdeps/unix/sysv/linux/wordsize-64/getdents64.c +++ /dev/null @@ -1 +0,0 @@ -/* getdents64 is in getdents.c */ -- cgit 1.4.1