Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-4.1-pull-request' into staging

Add statx
Fix netlink with IFLA_BR_MULTI_BOOLOPT
Fix mips (EXCP_FPE, struct flock)

# gpg: Signature made Tue 02 Jul 2019 16:05:18 BST
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-4.1-pull-request:
  linux-user: move QEMU_IFLA_BR_MULTI_BOOLOPT to the good function
  linux-user: Handle EXCP_FPE properly for MIPS
  linux-user: Introduce TARGET_HAVE_ARCH_STRUCT_FLOCK
  linux-user: Fix target_flock structure for MIPS O64 ABI
  linux-user: Add support for strace for statx() syscall
  linux-user: Add support for translation of statx() syscall

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

8 files changed, 283 insertions, 12 deletions

diff --git a/linux-user/fd-trans.c b/linux-user/fd-trans.c
index 612819c1b1..60077ce531 100644
--- a/linux-user/fd-trans.c
+++ b/linux-user/fd-trans.c
@@ -483,6 +483,12 @@ static abi_long host_to_target_data_bridge_nlattr(struct nlattr *nlattr,
     case QEMU_IFLA_BR_ROOT_ID:
     case QEMU_IFLA_BR_BRIDGE_ID:
         break;
+    /* br_boolopt_multi { uint32_t, uint32_t } */
+    case QEMU_IFLA_BR_MULTI_BOOLOPT:
+        u32 = NLA_DATA(nlattr);
+        u32[0] = tswap32(u32[0]); /* optval */
+        u32[1] = tswap32(u32[1]); /* optmask */
+        break;
     default:
         gemu_log("Unknown QEMU_IFLA_BR type %d\n", nlattr->nla_type);
         break;
@@ -546,12 +552,6 @@ static abi_long host_to_target_slave_data_bridge_nlattr(struct nlattr *nlattr,
     case QEMU_IFLA_BRPORT_ROOT_ID:
     case QEMU_IFLA_BRPORT_BRIDGE_ID:
         break;
-    /* br_boolopt_multi { uint32_t, uint32_t } */
-    case QEMU_IFLA_BR_MULTI_BOOLOPT:
-        u32 = NLA_DATA(nlattr);
-        u32[0] = tswap32(u32[0]); /* optval */
-        u32[1] = tswap32(u32[1]); /* optmask */
-        break;
     default:
         gemu_log("Unknown QEMU_IFLA_BRPORT type %d\n", nlattr->nla_type);
         break;
diff --git a/linux-user/generic/fcntl.h b/linux-user/generic/fcntl.h
index a775a491e9..9f727d4df2 100644
--- a/linux-user/generic/fcntl.h
+++ b/linux-user/generic/fcntl.h
@@ -120,6 +120,7 @@ struct target_f_owner_ex {
 #define TARGET_F_SHLCK         8
 #endif
 
+#ifndef TARGET_HAVE_ARCH_STRUCT_FLOCK
 #ifndef TARGET_ARCH_FLOCK_PAD
 #define TARGET_ARCH_FLOCK_PAD
 #endif
@@ -129,13 +130,12 @@ struct target_flock {
     short l_whence;
     abi_long l_start;
     abi_long l_len;
-#if defined(TARGET_MIPS)
-    abi_long l_sysid;
-#endif
     int l_pid;
     TARGET_ARCH_FLOCK_PAD
 };
+#endif
 
+#ifndef TARGET_HAVE_ARCH_STRUCT_FLOCK64
 #ifndef TARGET_ARCH_FLOCK64_PAD
 #define TARGET_ARCH_FLOCK64_PAD
 #endif
@@ -149,3 +149,5 @@ struct target_flock64 {
     TARGET_ARCH_FLOCK64_PAD
 };
 #endif
+
+#endif
diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
index 43ba267547..0ba894fa7a 100644
--- a/linux-user/mips/cpu_loop.c
+++ b/linux-user/mips/cpu_loop.c
@@ -540,6 +540,23 @@ done_syscall:
             info.si_code = TARGET_ILL_ILLOPC;
             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
             break;
+        case EXCP_FPE:
+            info.si_signo = TARGET_SIGFPE;
+            info.si_errno = 0;
+            info.si_code = TARGET_FPE_FLTUNK;
+            if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_INVALID) {
+                info.si_code = TARGET_FPE_FLTINV;
+            } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_DIV0) {
+                info.si_code = TARGET_FPE_FLTDIV;
+            } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_OVERFLOW) {
+                info.si_code = TARGET_FPE_FLTOVF;
+            } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_UNDERFLOW) {
+                info.si_code = TARGET_FPE_FLTUND;
+            } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_INEXACT) {
+                info.si_code = TARGET_FPE_FLTRES;
+            }
+            queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+            break;
         /* The code below was inspired by the MIPS Linux kernel trap
          * handling code in arch/mips/kernel/traps.c.
          */
diff --git a/linux-user/mips/target_fcntl.h b/linux-user/mips/target_fcntl.h
index 000527cc95..6fc7b8a12b 100644
--- a/linux-user/mips/target_fcntl.h
+++ b/linux-user/mips/target_fcntl.h
@@ -27,8 +27,21 @@
 #define TARGET_F_SETOWN        24       /*  for sockets. */
 #define TARGET_F_GETOWN        23       /*  for sockets. */
 
-#define TARGET_ARCH_FLOCK_PAD abi_long pad[4];
-#define TARGET_ARCH_FLOCK64_PAD
+#if (TARGET_ABI_BITS == 32)
+
+struct target_flock {
+    short l_type;
+    short l_whence;
+    abi_long l_start;
+    abi_long l_len;
+    abi_long l_sysid;
+    int l_pid;
+    abi_long pad[4];
+};
+
+#define TARGET_HAVE_ARCH_STRUCT_FLOCK
+
+#endif
 
 #define TARGET_F_GETLK64       33      /*  using 'struct flock64' */
 #define TARGET_F_SETLK64       34
diff --git a/linux-user/strace.c b/linux-user/strace.c
index 6f72a74c09..c80e93b5db 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -976,6 +976,76 @@ UNUSED static struct flags msg_flags[] = {
     FLAG_END,
 };
 
+UNUSED static struct flags statx_flags[] = {
+#ifdef AT_EMPTY_PATH
+    FLAG_GENERIC(AT_EMPTY_PATH),
+#endif
+#ifdef AT_NO_AUTOMOUNT
+    FLAG_GENERIC(AT_NO_AUTOMOUNT),
+#endif
+#ifdef AT_SYMLINK_NOFOLLOW
+    FLAG_GENERIC(AT_SYMLINK_NOFOLLOW),
+#endif
+#ifdef AT_STATX_SYNC_AS_STAT
+    FLAG_GENERIC(AT_STATX_SYNC_AS_STAT),
+#endif
+#ifdef AT_STATX_FORCE_SYNC
+    FLAG_GENERIC(AT_STATX_FORCE_SYNC),
+#endif
+#ifdef AT_STATX_DONT_SYNC
+    FLAG_GENERIC(AT_STATX_DONT_SYNC),
+#endif
+    FLAG_END,
+};
+
+UNUSED static struct flags statx_mask[] = {
+/* This must come first, because it includes everything.  */
+#ifdef STATX_ALL
+    FLAG_GENERIC(STATX_ALL),
+#endif
+/* This must come second; it includes everything except STATX_BTIME.  */
+#ifdef STATX_BASIC_STATS
+    FLAG_GENERIC(STATX_BASIC_STATS),
+#endif
+#ifdef STATX_TYPE
+    FLAG_GENERIC(STATX_TYPE),
+#endif
+#ifdef STATX_MODE
+    FLAG_GENERIC(STATX_MODE),
+#endif
+#ifdef STATX_NLINK
+    FLAG_GENERIC(STATX_NLINK),
+#endif
+#ifdef STATX_UID
+    FLAG_GENERIC(STATX_UID),
+#endif
+#ifdef STATX_GID
+    FLAG_GENERIC(STATX_GID),
+#endif
+#ifdef STATX_ATIME
+    FLAG_GENERIC(STATX_ATIME),
+#endif
+#ifdef STATX_MTIME
+    FLAG_GENERIC(STATX_MTIME),
+#endif
+#ifdef STATX_CTIME
+    FLAG_GENERIC(STATX_CTIME),
+#endif
+#ifdef STATX_INO
+    FLAG_GENERIC(STATX_INO),
+#endif
+#ifdef STATX_SIZE
+    FLAG_GENERIC(STATX_SIZE),
+#endif
+#ifdef STATX_BLOCKS
+    FLAG_GENERIC(STATX_BLOCKS),
+#endif
+#ifdef STATX_BTIME
+    FLAG_GENERIC(STATX_BTIME),
+#endif
+    FLAG_END,
+};
+
 /*
  * print_xxx utility functions.  These are used to print syscall
  * parameters in certain format.  All of these have parameter
@@ -2611,6 +2681,22 @@ print_tgkill(const struct syscallname *name,
 }
 #endif
 
+#ifdef TARGET_NR_statx
+static void
+print_statx(const struct syscallname *name,
+            abi_long arg0, abi_long arg1, abi_long arg2,
+            abi_long arg3, abi_long arg4, abi_long arg5)
+{
+    print_syscall_prologue(name);
+    print_at_dirfd(arg0, 0);
+    print_string(arg1, 0);
+    print_flags(statx_flags, arg2, 0);
+    print_flags(statx_mask, arg3, 0);
+    print_pointer(arg4, 1);
+    print_syscall_epilogue(name);
+}
+#endif
+
 /*
  * An array of all of the syscalls we know about
  */
diff --git a/linux-user/strace.list b/linux-user/strace.list
index db21ce4177..63a946642d 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -1650,3 +1650,6 @@
 #ifdef TARGET_NR_atomic_barrier
 { TARGET_NR_atomic_barrier, "atomic_barrier", NULL, NULL, NULL },
 #endif
+#ifdef TARGET_NR_statx
+{ TARGET_NR_statx, "statx", NULL, print_statx, NULL },
+#endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index d2c9817938..39a37496fe 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -238,6 +238,7 @@ static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,	\
 #define __NR_sys_inotify_init __NR_inotify_init
 #define __NR_sys_inotify_add_watch __NR_inotify_add_watch
 #define __NR_sys_inotify_rm_watch __NR_inotify_rm_watch
+#define __NR_sys_statx __NR_statx
 
 #if defined(__alpha__) || defined(__x86_64__) || defined(__s390x__)
 #define __NR__llseek __NR_lseek
@@ -316,6 +317,14 @@ _syscall5(int, kcmp, pid_t, pid1, pid_t, pid2, int, type,
           unsigned long, idx1, unsigned long, idx2)
 #endif
 
+/*
+ * It is assumed that struct statx is architecture independent.
+ */
+#if defined(TARGET_NR_statx) && defined(__NR_statx)
+_syscall5(int, sys_statx, int, dirfd, const char *, pathname, int, flags,
+          unsigned int, mask, struct target_statx *, statxbuf)
+#endif
+
 static bitmask_transtbl fcntl_flags_tbl[] = {
   { TARGET_O_ACCMODE,   TARGET_O_WRONLY,    O_ACCMODE,   O_WRONLY,    },
   { TARGET_O_ACCMODE,   TARGET_O_RDWR,      O_ACCMODE,   O_RDWR,      },
@@ -6516,6 +6525,48 @@ static inline abi_long host_to_target_stat64(void *cpu_env,
 }
 #endif
 
+#if defined(TARGET_NR_statx) && defined(__NR_statx)
+static inline abi_long host_to_target_statx(struct target_statx *host_stx,
+                                            abi_ulong target_addr)
+{
+    struct target_statx *target_stx;
+
+    if (!lock_user_struct(VERIFY_WRITE, target_stx, target_addr,  0)) {
+        return -TARGET_EFAULT;
+    }
+    memset(target_stx, 0, sizeof(*target_stx));
+
+    __put_user(host_stx->stx_mask, &target_stx->stx_mask);
+    __put_user(host_stx->stx_blksize, &target_stx->stx_blksize);
+    __put_user(host_stx->stx_attributes, &target_stx->stx_attributes);
+    __put_user(host_stx->stx_nlink, &target_stx->stx_nlink);
+    __put_user(host_stx->stx_uid, &target_stx->stx_uid);
+    __put_user(host_stx->stx_gid, &target_stx->stx_gid);
+    __put_user(host_stx->stx_mode, &target_stx->stx_mode);
+    __put_user(host_stx->stx_ino, &target_stx->stx_ino);
+    __put_user(host_stx->stx_size, &target_stx->stx_size);
+    __put_user(host_stx->stx_blocks, &target_stx->stx_blocks);
+    __put_user(host_stx->stx_attributes_mask, &target_stx->stx_attributes_mask);
+    __put_user(host_stx->stx_atime.tv_sec, &target_stx->stx_atime.tv_sec);
+    __put_user(host_stx->stx_atime.tv_nsec, &target_stx->stx_atime.tv_nsec);
+    __put_user(host_stx->stx_btime.tv_sec, &target_stx->stx_atime.tv_sec);
+    __put_user(host_stx->stx_btime.tv_nsec, &target_stx->stx_atime.tv_nsec);
+    __put_user(host_stx->stx_ctime.tv_sec, &target_stx->stx_atime.tv_sec);
+    __put_user(host_stx->stx_ctime.tv_nsec, &target_stx->stx_atime.tv_nsec);
+    __put_user(host_stx->stx_mtime.tv_sec, &target_stx->stx_atime.tv_sec);
+    __put_user(host_stx->stx_mtime.tv_nsec, &target_stx->stx_atime.tv_nsec);
+    __put_user(host_stx->stx_rdev_major, &target_stx->stx_rdev_major);
+    __put_user(host_stx->stx_rdev_minor, &target_stx->stx_rdev_minor);
+    __put_user(host_stx->stx_dev_major, &target_stx->stx_dev_major);
+    __put_user(host_stx->stx_dev_minor, &target_stx->stx_dev_minor);
+
+    unlock_user_struct(target_stx, target_addr, 1);
+
+    return 0;
+}
+#endif
+
+
 /* ??? Using host futex calls even when target atomic operations
    are not really atomic probably breaks things.  However implementing
    futexes locally would make futexes shared between multiple processes
@@ -7094,7 +7145,8 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
     abi_long ret;
 #if defined(TARGET_NR_stat) || defined(TARGET_NR_stat64) \
     || defined(TARGET_NR_lstat) || defined(TARGET_NR_lstat64) \
-    || defined(TARGET_NR_fstat) || defined(TARGET_NR_fstat64)
+    || defined(TARGET_NR_fstat) || defined(TARGET_NR_fstat64) \
+    || defined(TARGET_NR_statx)
     struct stat st;
 #endif
 #if defined(TARGET_NR_statfs) || defined(TARGET_NR_statfs64) \
@@ -10172,6 +10224,67 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
             ret = host_to_target_stat64(cpu_env, arg3, &st);
         return ret;
 #endif
+#if defined(TARGET_NR_statx)
+    case TARGET_NR_statx:
+        {
+            struct target_statx *target_stx;
+            int dirfd = arg1;
+            int flags = arg3;
+
+            p = lock_user_string(arg2);
+            if (p == NULL) {
+                return -TARGET_EFAULT;
+            }
+#if defined(__NR_statx)
+            {
+                /*
+                 * It is assumed that struct statx is architecture independent.
+                 */
+                struct target_statx host_stx;
+                int mask = arg4;
+
+                ret = get_errno(sys_statx(dirfd, p, flags, mask, &host_stx));
+                if (!is_error(ret)) {
+                    if (host_to_target_statx(&host_stx, arg5) != 0) {
+                        unlock_user(p, arg2, 0);
+                        return -TARGET_EFAULT;
+                    }
+                }
+
+                if (ret != -TARGET_ENOSYS) {
+                    unlock_user(p, arg2, 0);
+                    return ret;
+                }
+            }
+#endif
+            ret = get_errno(fstatat(dirfd, path(p), &st, flags));
+            unlock_user(p, arg2, 0);
+
+            if (!is_error(ret)) {
+                if (!lock_user_struct(VERIFY_WRITE, target_stx, arg5, 0)) {
+                    return -TARGET_EFAULT;
+                }
+                memset(target_stx, 0, sizeof(*target_stx));
+                __put_user(major(st.st_dev), &target_stx->stx_dev_major);
+                __put_user(minor(st.st_dev), &target_stx->stx_dev_minor);
+                __put_user(st.st_ino, &target_stx->stx_ino);
+                __put_user(st.st_mode, &target_stx->stx_mode);
+                __put_user(st.st_uid, &target_stx->stx_uid);
+                __put_user(st.st_gid, &target_stx->stx_gid);
+                __put_user(st.st_nlink, &target_stx->stx_nlink);
+                __put_user(major(st.st_rdev), &target_stx->stx_rdev_major);
+                __put_user(minor(st.st_rdev), &target_stx->stx_rdev_minor);
+                __put_user(st.st_size, &target_stx->stx_size);
+                __put_user(st.st_blksize, &target_stx->stx_blksize);
+                __put_user(st.st_blocks, &target_stx->stx_blocks);
+                __put_user(st.st_atime, &target_stx->stx_atime.tv_sec);
+                __put_user(st.st_mtime, &target_stx->stx_mtime.tv_sec);
+                __put_user(st.st_ctime, &target_stx->stx_ctime.tv_sec);
+                unlock_user_struct(target_stx, arg5, 1);
+            }
+        }
+        return ret;
+#endif
 #ifdef TARGET_NR_lchown
     case TARGET_NR_lchown:
         if (!(p = lock_user_string(arg1)))
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 3175440e9d..fffa89f256 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -2537,4 +2537,41 @@ struct target_user_cap_data {
 /* Return size of the log buffer */
 #define TARGET_SYSLOG_ACTION_SIZE_BUFFER   10
 
+struct target_statx_timestamp {
+   int64_t tv_sec;
+   uint32_t tv_nsec;
+   int32_t __reserved;
+};
+
+struct target_statx {
+   /* 0x00 */
+   uint32_t stx_mask;       /* What results were written [uncond] */
+   uint32_t stx_blksize;    /* Preferred general I/O size [uncond] */
+   uint64_t stx_attributes; /* Flags conveying information about the file */
+   /* 0x10 */
+   uint32_t stx_nlink;      /* Number of hard links */
+   uint32_t stx_uid;        /* User ID of owner */
+   uint32_t stx_gid;        /* Group ID of owner */
+   uint16_t stx_mode;       /* File mode */
+   uint16_t __spare0[1];
+   /* 0x20 */
+   uint64_t stx_ino;        /* Inode number */
+   uint64_t stx_size;       /* File size */
+   uint64_t stx_blocks;     /* Number of 512-byte blocks allocated */
+   uint64_t stx_attributes_mask; /* Mask to show what is supported */
+   /* 0x40 */
+   struct target_statx_timestamp  stx_atime;  /* Last access time */
+   struct target_statx_timestamp  stx_btime;  /* File creation time */
+   struct target_statx_timestamp  stx_ctime;  /* Last attribute change time */
+   struct target_statx_timestamp  stx_mtime;  /* Last data modification time */
+   /* 0x80 */
+   uint32_t stx_rdev_major;   /* Device ID of special file [if bdev/cdev] */
+   uint32_t stx_rdev_minor;
+   uint32_t stx_dev_major; /* ID of device containing file [uncond] */
+   uint32_t stx_dev_minor;
+   /* 0x90 */
+   uint64_t __spare2[14];  /* Spare space for future expansion */
+   /* 0x100 */
+};
+
 #endif