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bsd-user: Implement freebsd11 getdirents related syscalls 

Implement the freebsd11 variant of the following syscalls:
getdirentries(2)

Co-authored-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Michal Meloun <mmel@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
master
Michal Meloun 2023-08-13 10:41:46 +02:00 committed by Warner Losh
parent 196da9d3d3
commit 91a98c9bbc
1 changed files with 44 additions and 0 deletions
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44
bsd-user/freebsd/os-stat.h
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@ -41,6 +41,11 @@ __sym_compat(statfs, freebsd11_statfs, FBSD_1.0);
int freebsd11_fstatfs(int fd, struct freebsd11_statfs *buf);
__sym_compat(fstatfs, freebsd11_fstatfs, FBSD_1.0);
ssize_t freebsd11_getdirentries(int fd, char *buf, size_t nbytes, off_t *basep);
__sym_compat(getdirentries, freebsd11_getdirentries, FBSD_1.0);
ssize_t freebsd11_getdents(int fd, char *buf, size_t nbytes);
__sym_compat(getdents, freebsd11_getdents, FBSD_1.0);
/* stat(2) */
static inline abi_long do_freebsd11_stat(abi_long arg1, abi_long arg2)
@ -468,6 +473,45 @@ static inline abi_long do_freebsd11_getdents(abi_long arg1,
return ret;
}
/* getdirecentries(2) */
static inline abi_long do_freebsd11_getdirentries(abi_long arg1,
abi_ulong arg2, abi_long nbytes, abi_ulong arg4)
{
abi_long ret;
struct freebsd11_dirent *dirp;
long basep;
dirp = lock_user(VERIFY_WRITE, arg2, nbytes, 0);
if (dirp == NULL) {
return -TARGET_EFAULT;
}
ret = get_errno(freebsd11_getdirentries(arg1, (char *)dirp, nbytes, &basep));
if (!is_error(ret)) {
struct freebsd11_dirent *de;
int len = ret;
int reclen;
de = dirp;
while (len > 0) {
reclen = de->d_reclen;
if (reclen > len) {
return -TARGET_EFAULT;
}
de->d_reclen = tswap16(reclen);
de->d_fileno = tswap32(de->d_fileno);
len -= reclen;
de = (struct freebsd11_dirent *)((void *)de + reclen);
}
}
unlock_user(dirp, arg2, ret);
if (arg4) {
if (put_user(basep, arg4, abi_ulong)) {
return -TARGET_EFAULT;
}
}
return ret;
}
/* getdirecentries(2) */
static inline abi_long do_freebsd_getdirentries(abi_long arg1,
abi_ulong arg2, abi_long nbytes, abi_ulong arg4)