ID: 40893 Updated by: [EMAIL PROTECTED] Reported By: andrew at digicol dot de -Status: Open +Status: Feedback Bug Type: Filesystem function related Operating System: Redhat EL4 PHP Version: 4.4.5 New Comment:
>From what I can see in df sources, it uses exactly the same logics as PHP, so I don't really see how it's possible that you get correct values with df, especially taking into account that the f_frsize is broken in the same way there. You might want to look at this RH bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=146427 It says that RHEL3 U4 fixes it. Previous Comments: ------------------------------------------------------------------------ [2007-03-22 15:38:21] andrew at digicol dot de RedHat Linux: strace /dot/dc/bin/php/bin/php -r 'echo number_format(disk_total_space("/mnt")) . "\n";' ... statfs("/mnt", {f_type="NFS_SUPER_MAGIC", f_bsize=32768, f_blocks=9158253, f_bfree=5093458, f_bavail=5093458, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0 ... SuSE Linux: strace php -r 'echo number_format(disk_total_space("/mnt")) . "\n";' ... statfs("/mnt", {f_type="NFS_SUPER_MAGIC", f_bsize=32768, f_blocks=9158253, f_bfree=5093458, f_bavail=5093458, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=32768}) = 0 ... Just in case this helps, "df -h" seems to invoke the a different system call (statfs64, both systems are 32-bit, I am not an expert regarding system calls). They result in the same f_bsize and fr_size values. Unlike php, df draws the correct conclusions regarding total / free space on both systems: RedHat Linux: strace df -h ... statfs64("/mnt", 84, {f_type="NFS_SUPER_MAGIC", f_bsize=32768, f_blocks=9158253, f_bfree=5093460, f_bavail=5093460, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0 ... SuSE Linux: strace df -h ... statfs64("/mnt", 84, {f_type="NFS_SUPER_MAGIC", f_bsize=32768, f_blocks=9158253, f_bfree=5093460, f_bavail=5093460, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=32768}) = 0 ... ------------------------------------------------------------------------ [2007-03-22 15:21:36] [EMAIL PROTECTED] If you're still able to reproduce it - try to trace it and figure out which blocksize is reported by the system and which function is used - statvfs() or statfs(). ------------------------------------------------------------------------ [2007-03-22 15:17:43] [EMAIL PROTECTED] Please try using this CVS snapshot: http://snaps.php.net/php5.2-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.2-win32-latest.zip ------------------------------------------------------------------------ [2007-03-22 15:06:32] andrew at digicol dot de PHP version seems to be irrelevant, but I was forced to choose a version because of the bug category. I couldn't find the versions I tried it on (4.3.9, 5.2.0) in the version drop-down. ------------------------------------------------------------------------ [2007-03-22 14:59:05] andrew at digicol dot de Description: ------------ disk_total_space, disk_free_space reports wrong total and free space for NFS-mounted filesystems on RedHat Linux. This bug seems to be the related to #39520, if not the same. #39520 has been rated as 'bogus' which I think is a mistake. Please re-consider. The bug shows on RedHat Linux, but not SuSE Linux. This might ultimately be considered as a RedHat bug or of the libraries used there, but other commands (df) that use the statfs system call show the correct file system size / free space. It may be argued (like in #39520) that the wrong block size parameter is used to calculate total or free disk space. strace df -h shows RedHat and SuSE report different f_frsize, but same f_bsize on the same NFS share, but df reports the correct size on both. Reproduce code: --------------- Test: Mount a NFS share on a RedHat system and on a SuSE Linux system. 1) RedHat 2.6.9-34.EL, 32-bit [EMAIL PROTECTED] /]# mount -t nfs 10.20.0.178:/dot/oracle_dump /mnt [EMAIL PROTECTED] /]# df -h Filesystem Size Used Avail Use% Mounted on ... 10.20.0.178:/dot/oracle_dump 280G 125G 156G 45% /mnt [EMAIL PROTECTED] /]# /dot/dc/bin/php/bin/php -r 'echo_number_format(disk_total_space("/mnt")) . "\n";' 37,512,204,288 ==> Wrong size, seems to be real size / 8 2) SuSE Linux 9.3 32-bit suse:/ # mount -t nfs 10.20.0.178:/dot/oracle_dump /mnt suse:/ # df -h Filesystem Size Used Avail Use% Mounted on ... 10.20.0.178:/dot/oracle_dump 280G 125G 156G 45% /mnt suse:/ # php -r 'echo number_format(disk_total_space("/mnt")) . "\n";' 300,097,634,304 ==> Correct. Expected result: ---------------- I would expect the result to be 300G on both systems. Actual result: -------------- Reports 300G on SuSE Linux, around 35G only on RedHat. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=40893&edit=1
