From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47991) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uw5qA-0008II-FL for qemu-devel@nongnu.org; Mon, 08 Jul 2013 03:26:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Uw5q5-0005SK-Lk for qemu-devel@nongnu.org; Mon, 08 Jul 2013 03:26:30 -0400 Received: from mail-pa0-x236.google.com ([2607:f8b0:400e:c03::236]:40669) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uw5q5-0005S9-EG for qemu-devel@nongnu.org; Mon, 08 Jul 2013 03:26:25 -0400 Received: by mail-pa0-f54.google.com with SMTP id kx10so4082539pab.41 for ; Mon, 08 Jul 2013 00:26:24 -0700 (PDT) From: Xu Wang Date: Mon, 8 Jul 2013 03:26:03 -0400 Message-Id: <1373268366-14508-3-git-send-email-cngesaint@gmail.com> In-Reply-To: <1373268366-14508-1-git-send-email-cngesaint@gmail.com> References: <1373268366-14508-1-git-send-email-cngesaint@gmail.com> Subject: [Qemu-devel] [PATCH V2 2/5] Add WIN32 platform support for backing_file_loop_check() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, stefanha@gmail.com, Xu Wang , xiawenc@linux.vnet.ibm.com Signed-off-by: Xu Wang --- block.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) diff --git a/block.c b/block.c index 53b1a01..8dc6ded 100644 --- a/block.c +++ b/block.c @@ -4431,6 +4431,83 @@ bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie) bs->total_time_ns[cookie->type] += get_clock() - cookie->start_time_ns; } +#ifdef _WIN32 +static int get_lnk_target_file(const char *lnk_file, char *filepath) +{ + unsigned int flag, offet; + unsigned int sflag; + char uch; + int i = 0; + + FILE *fd = fopen(lnk_file, "rb"); + if (!fd) { + error_report("Open file %s failed.", lnk_file); + return -1; + } + fread(&flag, 4, 1, fd); + if (flag != 0x4c) { + error_report("%s is not a lnk file.", lnk_file); + fclose(fd); + return -1; + } + fseek(fd, 0x14, SEEK_SET); + fread(&flag, 4, 1, fd); + fseek(fd, 0x4c, SEEK_SET); + + if (flag & 0x01) { + fread(&sflag, 2, 1, fd); + fseek(fd, sflag, SEEK_CUR); + } + + offset = ftell(fd); + fseek(fd, offset + 0x10, SEEK_SET); + fread(&flag, 4, 1, fd); + fseek(fd, flag + offset, SEEK_SET); + + do { + fread(&uch, 1, 1, fd); + filepath[i++] = uch; + } while (uch != '\0'); + + fclose(fd); + return 0; +} + +static long get_win_inode(const char *filename) +{ + char pbuf[MAX_PATH_LEN], *p; + long inode; + struct stat sbuf; + char path[MAX_PATH_LEN]; + + /* If filename contains .lnk, it's a shortcuts. Target file + * * need to be parsed. + * */ + if (strstr(filename, ".lnk")) { + if (get_lnk_target_file(filename, path)) { + error_report("Parse .lnk file %s failed.", filename); + return -1; + } + } else { + memcpy(path, filename, sizeof(filename)); + } + + if (stat(path, &sbuf) == -1) { + error_report("get file %s stat error.", path); + return -1; + } + if (GetFullPathName(path, MAX_PATH_LEN, pbuf, &p) != 0) { + inode = 11003; + for (p = pbuf; *p != '\0'; p++) { + inode = inode * 31 + *(unsigned char *)p; + } + return (inode * 911) & 0x7FFF; + } + + return -1; +} +#endif + static gboolean str_equal_func(gconstpointer a, gconstpointer b) { return strcmp(a, b) == 0; @@ -4475,7 +4552,15 @@ bool bdrv_backing_file_loop_check(const char *filename, const char *fmt, error_report("Get file %s stat failed.", filename); goto err; } + #ifdef _WIN32 + inode = get_win_inode(filename); + if (inode == -1) { + error_report("Get file %s inode failed.", filename); + goto err; + } + #else inode = (long)sbuf.st_ino; + #endif } filename = backing_file; @@ -4488,7 +4573,16 @@ bool bdrv_backing_file_loop_check(const char *filename, const char *fmt, error_report("Get file %s stat failed.", filename); goto err; } + + #ifdef _WIN32 + inode = get_win_inode(filename); + if (inode == -1) { + error_report("Get file %s inode failed.", filename); + goto err; + } + #else inode = (long)sbuf.st_ino; + #endif if (g_hash_table_lookup_extended(inodes, &inode, NULL, NULL)) { error_report("Backing file '%s' creates an infinite loop.", -- 1.8.1.4