From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leonidas Spyropoulos Subject: Re: btrfs filesystem df not working Date: Wed, 13 Oct 2010 10:52:57 +0100 Message-ID: References: <20101013004332.GK22691@think> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: Chris Mason , Leonidas Spyropoulos , cwillu , linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <20101013004332.GK22691@think> List-ID: On Wed, Oct 13, 2010 at 1:43 AM, Chris Mason w= rote: > On Tue, Oct 12, 2010 at 02:45:19PM +0100, Leonidas Spyropoulos wrote: >> On Tue, Oct 12, 2010 at 2:43 PM, cwillu wrote: >> > On Tue, Oct 12, 2010 at 4:12 AM, Leonidas Spyropoulos >> > wrote: >> >> The above command is not working on my system. >> >> Information: >> >> btrfs f df /media/data >> > >> > btrfs f isn't unique; =A0fi is the minimum to specify "filesystem" >> > >> I tried even with btrfs filesystem df /media/data >> and same results. > > Does strace give us any clues? > According to strace there is inappropriate ioctl for the device. Here is the log PS: results are the same for root access [inglor@woofy ~]$ strace btrfs filesystem df /media/data/ execve("/usr/local/bin/btrfs", ["btrfs", "filesystem", "df", "/media/data/"], [/* 16 vars */]) =3D 0 brk(0) =3D 0x11ed000 access("/etc/ld.so.nohwcap", F_OK) =3D -1 ENOENT (No such file or = directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =3D 0x7fd28d424000 access("/etc/ld.so.preload", R_OK) =3D -1 ENOENT (No such file or = directory) open("/etc/ld.so.cache", O_RDONLY) =3D 3 fstat(3, {st_mode=3DS_IFREG|0644, st_size=3D126024, ...}) =3D 0 mmap(NULL, 126024, PROT_READ, MAP_PRIVATE, 3, 0) =3D 0x7fd28d405000 close(3) =3D 0 access("/etc/ld.so.nohwcap", F_OK) =3D -1 ENOENT (No such file or = directory) open("/lib/libuuid.so.1", O_RDONLY) =3D 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\25\0\0\0\0\= 0\0"..., 832) =3D 832 fstat(3, {st_mode=3DS_IFREG|0644, st_size=3D15720, ...}) =3D 0 mmap(NULL, 2110736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =3D 0x7fd28d005000 mprotect(0x7fd28d009000, 2093056, PROT_NONE) =3D 0 mmap(0x7fd28d208000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) =3D 0x7fd28d208000 close(3) =3D 0 access("/etc/ld.so.nohwcap", F_OK) =3D -1 ENOENT (No such file or = directory) open("/lib/libc.so.6", O_RDONLY) =3D 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\355\1\0\0\0\0\= 0"..., 832) =3D 832 fstat(3, {st_mode=3DS_IFREG|0755, st_size=3D1432968, ...}) =3D 0 mmap(NULL, 3541032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =3D 0x7fd28cca4000 mprotect(0x7fd28cdfc000, 2093056, PROT_NONE) =3D 0 mmap(0x7fd28cffb000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x157000) =3D 0x7fd28cffb000 mmap(0x7fd28d000000, 18472, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) =3D 0x7fd28d000000 close(3) =3D 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =3D 0x7fd28d404000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =3D 0x7fd28d402000 arch_prctl(ARCH_SET_FS, 0x7fd28d402740) =3D 0 mprotect(0x7fd28cffb000, 16384, PROT_READ) =3D 0 mprotect(0x7fd28d426000, 4096, PROT_READ) =3D 0 munmap(0x7fd28d405000, 126024) =3D 0 brk(0) =3D 0x11ed000 brk(0x120e000) =3D 0x120e000 stat("/media/data/", {st_mode=3DS_IFDIR|0755, st_size=3D124, ...}) =3D = 0 open("/media/data/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) =3D 3 fcntl(3, F_GETFD) =3D 0x1 (flags FD_CLOEXEC) ioctl(3, 0xc0109414, 0x11f5620) =3D -1 ENOTTY (Inappropriate ioctl for device) > -chris > > --=20 Caution: breathing may be hazardous to your health. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html