| Message ID | 1491480320-6511-1-git-send-email-zlang@redhat.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On 4/6/17 7:05 AM, Zorro Lang wrote: > Due to xfs_repair uses direct IO, sometimes it can't read superblock > from an image file has smaller sector size than host filesystem. > Especially that superblock doesn't align with host filesystem's > sector size. > > Fortunately, xfsprogs already has code to do isa_file and geometry > check in xfs_repair.c, it turns off O_DIRECT after phase1() if the > sector size is less than the host filesystem's geometry. So move > the isa_file auto detection over up the phase1(), and try to do > once geometry check before phase1() if get_sb() return OK. Zorro, can you do a quick test for me - does a filesystem which fails repair without this patch also fail xfs_copy if the source and/or destination of the copy is on this same filesystem/device as the image file in your xfs_repair test? Thanks, -Eric > Signed-off-by: Zorro Lang <zlang@redhat.com> > --- > > Hi, > > V2 did a stupid change, it tried to check superblock before get_sb(). So > V3 fix this problem by below changes: > > 1) move the "if (!isa_file)" auto detection over up the phase1(). > 2) try to get_sb() before phase1, and check the sector size. Turn > off the O_DIRECT if the sector size is smaller than the underlying > filesystem. > 3) The step#2 maybe fail, due to can't get a valid primary superblock. > So keep the similar steps after phase1(), I didn't remove it. > > Thanks, > Zorro > > repair/xfs_repair.c | 96 ++++++++++++++++++++++++++++++----------------------- > 1 file changed, 54 insertions(+), 42 deletions(-) > > diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c > index b07567b..9df5719 100644 > --- a/repair/xfs_repair.c > +++ b/repair/xfs_repair.c > @@ -627,6 +627,42 @@ is_multidisk_filesystem( > return true; > } > > +/* > + * if the sector size of the filesystem we are trying to repair is > + * smaller than that of the underlying filesystem (i.e. we are repairing > + * an image), the we have to turn off direct IO because we cannot do IO > + * smaller than the host filesystem's sector size. > + */ > +static void > +check_geometry_sectsize( > + struct xfs_sb *sb) > +{ > + int fd; > + long old_flags; > + struct xfs_fsop_geom_v1 geom = { 0 }; > + > + if (isa_file) { > + fd = libxfs_device_to_fd(x.ddev); > + > + if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > + do_log(_("Cannot get host filesystem geometry.\n" > + "Repair may fail if there is a sector size mismatch between\n" > + "the image and the host filesystem.\n")); > + geom.sectsize = BBSIZE; > + } > + > + if (sb->sb_sectsize < geom.sectsize) { > + old_flags = fcntl(fd, F_GETFL, 0); > + if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > + do_warn(_( > + "Sector size on host filesystem larger than image sector size.\n" > + "Cannot turn off direct IO, so exiting.\n")); > + exit(1); > + } > + } > + } > +} > + > int > main(int argc, char **argv) > { > @@ -657,6 +693,23 @@ main(int argc, char **argv) > timestamp(PHASE_START, 0, NULL); > timestamp(PHASE_END, 0, NULL); > > + /* -f forces this, but let's be nice and autodetect it, as well. */ > + if (!isa_file) { > + int fd = libxfs_device_to_fd(x.ddev); > + struct stat statbuf; > + > + if (fstat(fd, &statbuf) < 0) > + do_warn(_("%s: couldn't stat \"%s\"\n"), > + progname, fs_name); > + else if (S_ISREG(statbuf.st_mode)) > + isa_file = 1; > + } > + > + rval = get_sb(&psb, 0, XFS_MAX_SECTORSIZE, 0); > + if (rval == XR_OK) { > + check_geometry_sectsize(&psb); > + } > + > /* do phase1 to make sure we have a superblock */ > phase1(temp_mp); > timestamp(PHASE_END, 1, NULL); > @@ -674,48 +727,7 @@ main(int argc, char **argv) > "Exiting now.\n")); > exit(1); > } > - > - /* -f forces this, but let's be nice and autodetect it, as well. */ > - if (!isa_file) { > - int fd = libxfs_device_to_fd(x.ddev); > - struct stat statbuf; > - > - if (fstat(fd, &statbuf) < 0) > - do_warn(_("%s: couldn't stat \"%s\"\n"), > - progname, fs_name); > - else if (S_ISREG(statbuf.st_mode)) > - isa_file = 1; > - } > - > - /* > - * if the sector size of the filesystem we are trying to repair is > - * smaller than that of the underlying filesystem (i.e. we are repairing > - * an image), the we have to turn off direct IO because we cannot do IO > - * smaller than the host filesystem's sector size. > - */ > - if (isa_file) { > - int fd = libxfs_device_to_fd(x.ddev); > - struct xfs_fsop_geom_v1 geom = { 0 }; > - > - if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > - do_log(_("Cannot get host filesystem geometry.\n" > - "Repair may fail if there is a sector size mismatch between\n" > - "the image and the host filesystem.\n")); > - geom.sectsize = BBSIZE; > - } > - > - if (psb.sb_sectsize < geom.sectsize) { > - long old_flags; > - > - old_flags = fcntl(fd, F_GETFL, 0); > - if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > - do_warn(_( > - "Sector size on host filesystem larger than image sector size.\n" > - "Cannot turn off direct IO, so exiting.\n")); > - exit(1); > - } > - } > - } > + check_geometry_sectsize(&psb); > > /* > * Prepare the mount structure. Point the log reference to our local > -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 4/6/17 7:05 AM, Zorro Lang wrote: > Due to xfs_repair uses direct IO, sometimes it can't read superblock > from an image file has smaller sector size than host filesystem. > Especially that superblock doesn't align with host filesystem's > sector size. > > Fortunately, xfsprogs already has code to do isa_file and geometry > check in xfs_repair.c, it turns off O_DIRECT after phase1() if the > sector size is less than the host filesystem's geometry. So move > the isa_file auto detection over up the phase1(), and try to do > once geometry check before phase1() if get_sb() return OK. I think this looks mostly ok, a couple notes below. > Signed-off-by: Zorro Lang <zlang@redhat.com> > --- > > Hi, > > V2 did a stupid change, it tried to check superblock before get_sb(). So > V3 fix this problem by below changes: > > 1) move the "if (!isa_file)" auto detection over up the phase1(). > 2) try to get_sb() before phase1, and check the sector size. Turn > off the O_DIRECT if the sector size is smaller than the underlying > filesystem. > 3) The step#2 maybe fail, due to can't get a valid primary superblock. > So keep the similar steps after phase1(), I didn't remove it. > > Thanks, > Zorro > > repair/xfs_repair.c | 96 ++++++++++++++++++++++++++++++----------------------- > 1 file changed, 54 insertions(+), 42 deletions(-) > > diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c > index b07567b..9df5719 100644 > --- a/repair/xfs_repair.c > +++ b/repair/xfs_repair.c > @@ -627,6 +627,42 @@ is_multidisk_filesystem( > return true; > } > > +/* > + * if the sector size of the filesystem we are trying to repair is > + * smaller than that of the underlying filesystem (i.e. we are repairing > + * an image), the we have to turn off direct IO because we cannot do IO > + * smaller than the host filesystem's sector size. > + */ > +static void > +check_geometry_sectsize( > + struct xfs_sb *sb) > +{ > + int fd; > + long old_flags; > + struct xfs_fsop_geom_v1 geom = { 0 }; > + > + if (isa_file) { > + fd = libxfs_device_to_fd(x.ddev); > + > + if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > + do_log(_("Cannot get host filesystem geometry.\n" > + "Repair may fail if there is a sector size mismatch between\n" > + "the image and the host filesystem.\n")); > + geom.sectsize = BBSIZE; > + } > + > + if (sb->sb_sectsize < geom.sectsize) { > + old_flags = fcntl(fd, F_GETFL, 0); > + if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > + do_warn(_( > + "Sector size on host filesystem larger than image sector size.\n" > + "Cannot turn off direct IO, so exiting.\n")); > + exit(1); > + } > + } > + } > +} It's not super clear from the caller's context that this can error out and exit, but that's probably ok. > + > int > main(int argc, char **argv) > { > @@ -657,6 +693,23 @@ main(int argc, char **argv) > timestamp(PHASE_START, 0, NULL); > timestamp(PHASE_END, 0, NULL); > > + /* -f forces this, but let's be nice and autodetect it, as well. */ > + if (!isa_file) { > + int fd = libxfs_device_to_fd(x.ddev); > + struct stat statbuf; > + > + if (fstat(fd, &statbuf) < 0) > + do_warn(_("%s: couldn't stat \"%s\"\n"), > + progname, fs_name); > + else if (S_ISREG(statbuf.st_mode)) > + isa_file = 1; > + } > + A comment here about a "best effort" read and check of the filesytem's sector size is probably useful. The next person to read this may wonder why there's no "else" case or failure ... it's just a best effort, right? > + rval = get_sb(&psb, 0, XFS_MAX_SECTORSIZE, 0); > + if (rval == XR_OK) { > + check_geometry_sectsize(&psb); > + } (No need for braces around the 1 line under "if") What do you think about only calling this if isa_file is true, because that's the only time it matters, and it might be good to be clear about this in the caller. i.e.: if (isa_file) { /* Best effort attempt to validate fs vs host sector size */ rval = get_sb(&psb, 0, XFS_MAX_SECTORSIZE, 0); if (rval == XR_OK) check_fs_vs_host_sectsize(&psb); } and remove the isa_file() from the called function. (and rename the function to something a little more descriptive, maybe like above?) > + > /* do phase1 to make sure we have a superblock */ > phase1(temp_mp); > timestamp(PHASE_END, 1, NULL); > @@ -674,48 +727,7 @@ main(int argc, char **argv) > "Exiting now.\n")); > exit(1); > } > - > - /* -f forces this, but let's be nice and autodetect it, as well. */ > - if (!isa_file) { > - int fd = libxfs_device_to_fd(x.ddev); > - struct stat statbuf; > - > - if (fstat(fd, &statbuf) < 0) > - do_warn(_("%s: couldn't stat \"%s\"\n"), > - progname, fs_name); > - else if (S_ISREG(statbuf.st_mode)) > - isa_file = 1; > - } > - > - /* > - * if the sector size of the filesystem we are trying to repair is > - * smaller than that of the underlying filesystem (i.e. we are repairing > - * an image), the we have to turn off direct IO because we cannot do IO > - * smaller than the host filesystem's sector size. > - */ > - if (isa_file) { > - int fd = libxfs_device_to_fd(x.ddev); > - struct xfs_fsop_geom_v1 geom = { 0 }; > - > - if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > - do_log(_("Cannot get host filesystem geometry.\n" > - "Repair may fail if there is a sector size mismatch between\n" > - "the image and the host filesystem.\n")); > - geom.sectsize = BBSIZE; > - } > - > - if (psb.sb_sectsize < geom.sectsize) { > - long old_flags; > - > - old_flags = fcntl(fd, F_GETFL, 0); > - if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > - do_warn(_( > - "Sector size on host filesystem larger than image sector size.\n" > - "Cannot turn off direct IO, so exiting.\n")); > - exit(1); > - } > - } > - } and maybe another comment: /* * Now that we have completely validated the superblock, geometry may * have changed; re-check geometry vs the host filesystem geometry */ > + check_geometry_sectsize(&psb); if (isa_file) check_fs_vs_host_sectsize(&psb); Thanks, -Eric > /* > * Prepare the mount structure. Point the log reference to our local > -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Apr 10, 2017 at 12:16:41PM -0500, Eric Sandeen wrote: > On 4/6/17 7:05 AM, Zorro Lang wrote: > > Due to xfs_repair uses direct IO, sometimes it can't read superblock > > from an image file has smaller sector size than host filesystem. > > Especially that superblock doesn't align with host filesystem's > > sector size. > > > > Fortunately, xfsprogs already has code to do isa_file and geometry > > check in xfs_repair.c, it turns off O_DIRECT after phase1() if the > > sector size is less than the host filesystem's geometry. So move > > the isa_file auto detection over up the phase1(), and try to do > > once geometry check before phase1() if get_sb() return OK. > > Zorro, can you do a quick test for me - does a filesystem which fails > repair without this patch also fail xfs_copy if the source and/or > destination of the copy is on this same filesystem/device as the image > file in your xfs_repair test? Sure, the xfs_copy has similar problem. I'm writting a xfstests case to do xfs_repair and xfs_copy a file image likes this. Do you have any other related suggestions which I can write them together? About the xfs_copy, the test result likes below: [root@ibm-x3850x5-03 test]# xfs_info . meta-data=/dev/sdb isize=512 agcount=4, agsize=960000 blks = sectsz=4096 attr=2, projid32bit=1 = crc=1 finobt=1 spinodes=0 rmapbt=0 = reflink=0 data = bsize=4096 blocks=3840000, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=2560, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 [root@ibm-x3850x5-03 test]# mount -oloop 078.fs /mnt/tmp [root@ibm-x3850x5-03 test]# xfs_info 078.fs meta-data=/dev/sdb isize=512 agcount=4, agsize=960000 blks = sectsz=4096 attr=2, projid32bit=1 = crc=1 finobt=1 spinodes=0 rmapbt=0 = reflink=0 data = bsize=4096 blocks=3840000, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=2560, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 [root@ibm-x3850x5-03 test]# umount /mnt/tmp [root@ibm-x3850x5-03 test]# xfs_repair -f 078.fs Phase 1 - find and verify superblock... superblock read failed, offset 43014144, size 131072, ag 1, rval -1 fatal error -- Invalid argument [root@ibm-x3850x5-03 test]# xfs_copy 078.fs 078.fs.bk xfs_copy: read failed: Invalid argument xfs_copy: read failed: Invalid argument [root@ibm-x3850x5-03 test]# xfs_copy 078.fs /tmp xfs_copy: read failed: Invalid argument xfs_copy: read failed: Invalid argument [root@ibm-x3850x5-03 test]# strace xfs_copy 078.fs 078.fs.img ... ... open("078.fs", O_RDONLY|O_DIRECT) = 5 fstat(5, {st_mode=S_IFREG|0600, st_size=688231424, ...}) = 0 fstat(5, {st_mode=S_IFREG|0600, st_size=688231424, ...}) = 0 ioctl(5, _IOC(_IOC_READ, 0x58, 0x1e, 0x0c), 0x7ffd28252c80) = 0 chdir("/mnt/test") = 0 pread64(5, "XFSB\0\0\4\0\0\0\0\0\0\nA`\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768, 0) = 32768 pread64(5, 0x74c000, 512, 0) = -1 EINVAL (Invalid argument) write(2, "xfs_copy: read failed: Invalid a"..., 40xfs_copy: read failed: Invalid argument ) = 40 pread64(5, 0x74d000, 512, 688225792) = -1 EINVAL (Invalid argument) write(2, "xfs_copy: read failed: Invalid a"..., 40xfs_copy: read failed: Invalid argument ) = 40 exit_group(1) = ? +++ exited with 1 +++ > > Thanks, > -Eric > > > Signed-off-by: Zorro Lang <zlang@redhat.com> > > --- > > > > Hi, > > > > V2 did a stupid change, it tried to check superblock before get_sb(). So > > V3 fix this problem by below changes: > > > > 1) move the "if (!isa_file)" auto detection over up the phase1(). > > 2) try to get_sb() before phase1, and check the sector size. Turn > > off the O_DIRECT if the sector size is smaller than the underlying > > filesystem. > > 3) The step#2 maybe fail, due to can't get a valid primary superblock. > > So keep the similar steps after phase1(), I didn't remove it. > > > > Thanks, > > Zorro > > > > repair/xfs_repair.c | 96 ++++++++++++++++++++++++++++++----------------------- > > 1 file changed, 54 insertions(+), 42 deletions(-) > > > > diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c > > index b07567b..9df5719 100644 > > --- a/repair/xfs_repair.c > > +++ b/repair/xfs_repair.c > > @@ -627,6 +627,42 @@ is_multidisk_filesystem( > > return true; > > } > > > > +/* > > + * if the sector size of the filesystem we are trying to repair is > > + * smaller than that of the underlying filesystem (i.e. we are repairing > > + * an image), the we have to turn off direct IO because we cannot do IO > > + * smaller than the host filesystem's sector size. > > + */ > > +static void > > +check_geometry_sectsize( > > + struct xfs_sb *sb) > > +{ > > + int fd; > > + long old_flags; > > + struct xfs_fsop_geom_v1 geom = { 0 }; > > + > > + if (isa_file) { > > + fd = libxfs_device_to_fd(x.ddev); > > + > > + if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > > + do_log(_("Cannot get host filesystem geometry.\n" > > + "Repair may fail if there is a sector size mismatch between\n" > > + "the image and the host filesystem.\n")); > > + geom.sectsize = BBSIZE; > > + } > > + > > + if (sb->sb_sectsize < geom.sectsize) { > > + old_flags = fcntl(fd, F_GETFL, 0); > > + if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > > + do_warn(_( > > + "Sector size on host filesystem larger than image sector size.\n" > > + "Cannot turn off direct IO, so exiting.\n")); > > + exit(1); > > + } > > + } > > + } > > +} > > + > > int > > main(int argc, char **argv) > > { > > @@ -657,6 +693,23 @@ main(int argc, char **argv) > > timestamp(PHASE_START, 0, NULL); > > timestamp(PHASE_END, 0, NULL); > > > > + /* -f forces this, but let's be nice and autodetect it, as well. */ > > + if (!isa_file) { > > + int fd = libxfs_device_to_fd(x.ddev); > > + struct stat statbuf; > > + > > + if (fstat(fd, &statbuf) < 0) > > + do_warn(_("%s: couldn't stat \"%s\"\n"), > > + progname, fs_name); > > + else if (S_ISREG(statbuf.st_mode)) > > + isa_file = 1; > > + } > > + > > + rval = get_sb(&psb, 0, XFS_MAX_SECTORSIZE, 0); > > + if (rval == XR_OK) { > > + check_geometry_sectsize(&psb); > > + } > > + > > /* do phase1 to make sure we have a superblock */ > > phase1(temp_mp); > > timestamp(PHASE_END, 1, NULL); > > @@ -674,48 +727,7 @@ main(int argc, char **argv) > > "Exiting now.\n")); > > exit(1); > > } > > - > > - /* -f forces this, but let's be nice and autodetect it, as well. */ > > - if (!isa_file) { > > - int fd = libxfs_device_to_fd(x.ddev); > > - struct stat statbuf; > > - > > - if (fstat(fd, &statbuf) < 0) > > - do_warn(_("%s: couldn't stat \"%s\"\n"), > > - progname, fs_name); > > - else if (S_ISREG(statbuf.st_mode)) > > - isa_file = 1; > > - } > > - > > - /* > > - * if the sector size of the filesystem we are trying to repair is > > - * smaller than that of the underlying filesystem (i.e. we are repairing > > - * an image), the we have to turn off direct IO because we cannot do IO > > - * smaller than the host filesystem's sector size. > > - */ > > - if (isa_file) { > > - int fd = libxfs_device_to_fd(x.ddev); > > - struct xfs_fsop_geom_v1 geom = { 0 }; > > - > > - if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > > - do_log(_("Cannot get host filesystem geometry.\n" > > - "Repair may fail if there is a sector size mismatch between\n" > > - "the image and the host filesystem.\n")); > > - geom.sectsize = BBSIZE; > > - } > > - > > - if (psb.sb_sectsize < geom.sectsize) { > > - long old_flags; > > - > > - old_flags = fcntl(fd, F_GETFL, 0); > > - if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > > - do_warn(_( > > - "Sector size on host filesystem larger than image sector size.\n" > > - "Cannot turn off direct IO, so exiting.\n")); > > - exit(1); > > - } > > - } > > - } > > + check_geometry_sectsize(&psb); > > > > /* > > * Prepare the mount structure. Point the log reference to our local > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Apr 11, 2017 at 11:25:41AM +0800, Zorro Lang wrote: > On Mon, Apr 10, 2017 at 12:16:41PM -0500, Eric Sandeen wrote: > > On 4/6/17 7:05 AM, Zorro Lang wrote: > > > Due to xfs_repair uses direct IO, sometimes it can't read superblock > > > from an image file has smaller sector size than host filesystem. > > > Especially that superblock doesn't align with host filesystem's > > > sector size. > > > > > > Fortunately, xfsprogs already has code to do isa_file and geometry > > > check in xfs_repair.c, it turns off O_DIRECT after phase1() if the > > > sector size is less than the host filesystem's geometry. So move > > > the isa_file auto detection over up the phase1(), and try to do > > > once geometry check before phase1() if get_sb() return OK. > > > > Zorro, can you do a quick test for me - does a filesystem which fails > > repair without this patch also fail xfs_copy if the source and/or > > destination of the copy is on this same filesystem/device as the image > > file in your xfs_repair test? > > Sure, the xfs_copy has similar problem. I'm writting a xfstests case to > do xfs_repair and xfs_copy a file image likes this. Do you have any other > related suggestions which I can write them together? > > About the xfs_copy, the test result likes below: > [root@ibm-x3850x5-03 test]# xfs_info . > meta-data=/dev/sdb isize=512 agcount=4, agsize=960000 blks > = sectsz=4096 attr=2, projid32bit=1 > = crc=1 finobt=1 spinodes=0 rmapbt=0 > = reflink=0 > data = bsize=4096 blocks=3840000, imaxpct=25 > = sunit=0 swidth=0 blks > naming =version 2 bsize=4096 ascii-ci=0 ftype=1 > log =internal bsize=4096 blocks=2560, version=2 > = sectsz=4096 sunit=1 blks, lazy-count=1 > realtime =none extsz=4096 blocks=0, rtextents=0 > [root@ibm-x3850x5-03 test]# mount -oloop 078.fs /mnt/tmp > [root@ibm-x3850x5-03 test]# xfs_info 078.fs > meta-data=/dev/sdb isize=512 agcount=4, agsize=960000 blks > = sectsz=4096 attr=2, projid32bit=1 > = crc=1 finobt=1 spinodes=0 rmapbt=0 > = reflink=0 > data = bsize=4096 blocks=3840000, imaxpct=25 > = sunit=0 swidth=0 blks > naming =version 2 bsize=4096 ascii-ci=0 ftype=1 > log =internal bsize=4096 blocks=2560, version=2 > = sectsz=4096 sunit=1 blks, lazy-count=1 > realtime =none extsz=4096 blocks=0, rtextents=0 > [root@ibm-x3850x5-03 test]# umount /mnt/tmp > [root@ibm-x3850x5-03 test]# xfs_repair -f 078.fs > Phase 1 - find and verify superblock... > superblock read failed, offset 43014144, size 131072, ag 1, rval -1 > > fatal error -- Invalid argument > [root@ibm-x3850x5-03 test]# xfs_copy 078.fs 078.fs.bk > xfs_copy: read failed: Invalid argument > xfs_copy: read failed: Invalid argument > [root@ibm-x3850x5-03 test]# xfs_copy 078.fs /tmp > xfs_copy: read failed: Invalid argument > xfs_copy: read failed: Invalid argument BTW, the '-d' or '-b' options of xfs_copy is not helpful either, the problem occured on reading the source file, not write the target file. Thanks, Zorro > [root@ibm-x3850x5-03 test]# strace xfs_copy 078.fs 078.fs.img > ... > ... > open("078.fs", O_RDONLY|O_DIRECT) = 5 > fstat(5, {st_mode=S_IFREG|0600, st_size=688231424, ...}) = 0 > fstat(5, {st_mode=S_IFREG|0600, st_size=688231424, ...}) = 0 > ioctl(5, _IOC(_IOC_READ, 0x58, 0x1e, 0x0c), 0x7ffd28252c80) = 0 > chdir("/mnt/test") = 0 > pread64(5, "XFSB\0\0\4\0\0\0\0\0\0\nA`\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768, 0) = 32768 > pread64(5, 0x74c000, 512, 0) = -1 EINVAL (Invalid argument) > write(2, "xfs_copy: read failed: Invalid a"..., 40xfs_copy: read failed: Invalid argument > ) = 40 > pread64(5, 0x74d000, 512, 688225792) = -1 EINVAL (Invalid argument) > write(2, "xfs_copy: read failed: Invalid a"..., 40xfs_copy: read failed: Invalid argument > ) = 40 > exit_group(1) = ? > +++ exited with 1 +++ > > > > > Thanks, > > -Eric > > > > > Signed-off-by: Zorro Lang <zlang@redhat.com> > > > --- > > > > > > Hi, > > > > > > V2 did a stupid change, it tried to check superblock before get_sb(). So > > > V3 fix this problem by below changes: > > > > > > 1) move the "if (!isa_file)" auto detection over up the phase1(). > > > 2) try to get_sb() before phase1, and check the sector size. Turn > > > off the O_DIRECT if the sector size is smaller than the underlying > > > filesystem. > > > 3) The step#2 maybe fail, due to can't get a valid primary superblock. > > > So keep the similar steps after phase1(), I didn't remove it. > > > > > > Thanks, > > > Zorro > > > > > > repair/xfs_repair.c | 96 ++++++++++++++++++++++++++++++----------------------- > > > 1 file changed, 54 insertions(+), 42 deletions(-) > > > > > > diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c > > > index b07567b..9df5719 100644 > > > --- a/repair/xfs_repair.c > > > +++ b/repair/xfs_repair.c > > > @@ -627,6 +627,42 @@ is_multidisk_filesystem( > > > return true; > > > } > > > > > > +/* > > > + * if the sector size of the filesystem we are trying to repair is > > > + * smaller than that of the underlying filesystem (i.e. we are repairing > > > + * an image), the we have to turn off direct IO because we cannot do IO > > > + * smaller than the host filesystem's sector size. > > > + */ > > > +static void > > > +check_geometry_sectsize( > > > + struct xfs_sb *sb) > > > +{ > > > + int fd; > > > + long old_flags; > > > + struct xfs_fsop_geom_v1 geom = { 0 }; > > > + > > > + if (isa_file) { > > > + fd = libxfs_device_to_fd(x.ddev); > > > + > > > + if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > > > + do_log(_("Cannot get host filesystem geometry.\n" > > > + "Repair may fail if there is a sector size mismatch between\n" > > > + "the image and the host filesystem.\n")); > > > + geom.sectsize = BBSIZE; > > > + } > > > + > > > + if (sb->sb_sectsize < geom.sectsize) { > > > + old_flags = fcntl(fd, F_GETFL, 0); > > > + if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > > > + do_warn(_( > > > + "Sector size on host filesystem larger than image sector size.\n" > > > + "Cannot turn off direct IO, so exiting.\n")); > > > + exit(1); > > > + } > > > + } > > > + } > > > +} > > > + > > > int > > > main(int argc, char **argv) > > > { > > > @@ -657,6 +693,23 @@ main(int argc, char **argv) > > > timestamp(PHASE_START, 0, NULL); > > > timestamp(PHASE_END, 0, NULL); > > > > > > + /* -f forces this, but let's be nice and autodetect it, as well. */ > > > + if (!isa_file) { > > > + int fd = libxfs_device_to_fd(x.ddev); > > > + struct stat statbuf; > > > + > > > + if (fstat(fd, &statbuf) < 0) > > > + do_warn(_("%s: couldn't stat \"%s\"\n"), > > > + progname, fs_name); > > > + else if (S_ISREG(statbuf.st_mode)) > > > + isa_file = 1; > > > + } > > > + > > > + rval = get_sb(&psb, 0, XFS_MAX_SECTORSIZE, 0); > > > + if (rval == XR_OK) { > > > + check_geometry_sectsize(&psb); > > > + } > > > + > > > /* do phase1 to make sure we have a superblock */ > > > phase1(temp_mp); > > > timestamp(PHASE_END, 1, NULL); > > > @@ -674,48 +727,7 @@ main(int argc, char **argv) > > > "Exiting now.\n")); > > > exit(1); > > > } > > > - > > > - /* -f forces this, but let's be nice and autodetect it, as well. */ > > > - if (!isa_file) { > > > - int fd = libxfs_device_to_fd(x.ddev); > > > - struct stat statbuf; > > > - > > > - if (fstat(fd, &statbuf) < 0) > > > - do_warn(_("%s: couldn't stat \"%s\"\n"), > > > - progname, fs_name); > > > - else if (S_ISREG(statbuf.st_mode)) > > > - isa_file = 1; > > > - } > > > - > > > - /* > > > - * if the sector size of the filesystem we are trying to repair is > > > - * smaller than that of the underlying filesystem (i.e. we are repairing > > > - * an image), the we have to turn off direct IO because we cannot do IO > > > - * smaller than the host filesystem's sector size. > > > - */ > > > - if (isa_file) { > > > - int fd = libxfs_device_to_fd(x.ddev); > > > - struct xfs_fsop_geom_v1 geom = { 0 }; > > > - > > > - if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { > > > - do_log(_("Cannot get host filesystem geometry.\n" > > > - "Repair may fail if there is a sector size mismatch between\n" > > > - "the image and the host filesystem.\n")); > > > - geom.sectsize = BBSIZE; > > > - } > > > - > > > - if (psb.sb_sectsize < geom.sectsize) { > > > - long old_flags; > > > - > > > - old_flags = fcntl(fd, F_GETFL, 0); > > > - if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { > > > - do_warn(_( > > > - "Sector size on host filesystem larger than image sector size.\n" > > > - "Cannot turn off direct IO, so exiting.\n")); > > > - exit(1); > > > - } > > > - } > > > - } > > > + check_geometry_sectsize(&psb); > > > > > > /* > > > * Prepare the mount structure. Point the log reference to our local > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 4/10/17 10:25 PM, Zorro Lang wrote: > On Mon, Apr 10, 2017 at 12:16:41PM -0500, Eric Sandeen wrote: >> On 4/6/17 7:05 AM, Zorro Lang wrote: >>> Due to xfs_repair uses direct IO, sometimes it can't read superblock >>> from an image file has smaller sector size than host filesystem. >>> Especially that superblock doesn't align with host filesystem's >>> sector size. >>> >>> Fortunately, xfsprogs already has code to do isa_file and geometry >>> check in xfs_repair.c, it turns off O_DIRECT after phase1() if the >>> sector size is less than the host filesystem's geometry. So move >>> the isa_file auto detection over up the phase1(), and try to do >>> once geometry check before phase1() if get_sb() return OK. >> >> Zorro, can you do a quick test for me - does a filesystem which fails >> repair without this patch also fail xfs_copy if the source and/or >> destination of the copy is on this same filesystem/device as the image >> file in your xfs_repair test? > > Sure, the xfs_copy has similar problem. I'm writting a xfstests case to > do xfs_repair and xfs_copy a file image likes this. Do you have any other > related suggestions which I can write them together? Any userspace which needs to read a filesystem image probably has the same issue. I'm wondering if all of this handling should somehow be factored out and re-used across the utilities... -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Apr 10, 2017 at 10:57:11PM -0500, Eric Sandeen wrote: > On 4/10/17 10:25 PM, Zorro Lang wrote: > > On Mon, Apr 10, 2017 at 12:16:41PM -0500, Eric Sandeen wrote: > >> On 4/6/17 7:05 AM, Zorro Lang wrote: > >>> Due to xfs_repair uses direct IO, sometimes it can't read superblock > >>> from an image file has smaller sector size than host filesystem. > >>> Especially that superblock doesn't align with host filesystem's > >>> sector size. > >>> > >>> Fortunately, xfsprogs already has code to do isa_file and geometry > >>> check in xfs_repair.c, it turns off O_DIRECT after phase1() if the > >>> sector size is less than the host filesystem's geometry. So move > >>> the isa_file auto detection over up the phase1(), and try to do > >>> once geometry check before phase1() if get_sb() return OK. > >> > >> Zorro, can you do a quick test for me - does a filesystem which fails > >> repair without this patch also fail xfs_copy if the source and/or > >> destination of the copy is on this same filesystem/device as the image > >> file in your xfs_repair test? > > > > Sure, the xfs_copy has similar problem. I'm writting a xfstests case to > > do xfs_repair and xfs_copy a file image likes this. Do you have any other > > related suggestions which I can write them together? > > Any userspace which needs to read a filesystem image probably has the same > issue. I've already tested xfs_repair, xfs_copy, xfs_metadump, xfs_mdrestore and xfs_db -c "sb $i". Only xfs_repair and xfs_copy failed. And I noticed that xfs_copy open source file with O_DIRECT on purpose: if (source_is_file && platform_test_xfs_fd(source_fd)) { if (fcntl(source_fd, F_SETFL, open_flags | O_DIRECT) < 0) { do_log(_("%s: Cannot set direct I/O flag on \"%s\".\n"), progname, source_name); die_perror(); } I don't learn about the reason so much, maybe we shouldn't turn off its O_DIRECT ? Thanks, Zorro > > I'm wondering if all of this handling should somehow be factored out and > re-used across the utilities... > > -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 4/10/17 11:31 PM, Zorro Lang wrote: > On Mon, Apr 10, 2017 at 10:57:11PM -0500, Eric Sandeen wrote: >> On 4/10/17 10:25 PM, Zorro Lang wrote: >>> On Mon, Apr 10, 2017 at 12:16:41PM -0500, Eric Sandeen wrote: >>>> On 4/6/17 7:05 AM, Zorro Lang wrote: >>>>> Due to xfs_repair uses direct IO, sometimes it can't read superblock >>>>> from an image file has smaller sector size than host filesystem. >>>>> Especially that superblock doesn't align with host filesystem's >>>>> sector size. >>>>> >>>>> Fortunately, xfsprogs already has code to do isa_file and geometry >>>>> check in xfs_repair.c, it turns off O_DIRECT after phase1() if the >>>>> sector size is less than the host filesystem's geometry. So move >>>>> the isa_file auto detection over up the phase1(), and try to do >>>>> once geometry check before phase1() if get_sb() return OK. >>>> >>>> Zorro, can you do a quick test for me - does a filesystem which fails >>>> repair without this patch also fail xfs_copy if the source and/or >>>> destination of the copy is on this same filesystem/device as the image >>>> file in your xfs_repair test? >>> >>> Sure, the xfs_copy has similar problem. I'm writting a xfstests case to >>> do xfs_repair and xfs_copy a file image likes this. Do you have any other >>> related suggestions which I can write them together? >> >> Any userspace which needs to read a filesystem image probably has the same >> issue. > > I've already tested xfs_repair, xfs_copy, xfs_metadump, xfs_mdrestore and > xfs_db -c "sb $i". Only xfs_repair and xfs_copy failed. Turns out I was wrong in my guess. Most of those applications do not use O_DIRECT, so the problem does not exist. > And I noticed that xfs_copy open source file with O_DIRECT on purpose: > if (source_is_file && platform_test_xfs_fd(source_fd)) { > if (fcntl(source_fd, F_SETFL, open_flags | O_DIRECT) < 0) { > do_log(_("%s: Cannot set direct I/O flag on \"%s\".\n"), > progname, source_name); > die_perror(); > } > > I don't learn about the reason so much, maybe we shouldn't turn off > its O_DIRECT ? I think most of these applications use O_DIRECT to avoid polluting the page cache for a one-off read of the filesystem, and/or to manage caching on its own (in the xfs_repair case). I'm not actually sure why xfs_metadump doesn't use O_DIRECT, other than that it is part of xfs_db, which also doesn't use O_DIRECT. In any case, xfs_copy seems to have similar issues, and probably needs fixing as well. It might make sense to try to factor out some of this handling into a common helper, in the long run. -Eric > Thanks, > Zorro > >> >> I'm wondering if all of this handling should somehow be factored out and >> re-used across the utilities... >> >> -Eric > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c index b07567b..9df5719 100644 --- a/repair/xfs_repair.c +++ b/repair/xfs_repair.c @@ -627,6 +627,42 @@ is_multidisk_filesystem( return true; } +/* + * if the sector size of the filesystem we are trying to repair is + * smaller than that of the underlying filesystem (i.e. we are repairing + * an image), the we have to turn off direct IO because we cannot do IO + * smaller than the host filesystem's sector size. + */ +static void +check_geometry_sectsize( + struct xfs_sb *sb) +{ + int fd; + long old_flags; + struct xfs_fsop_geom_v1 geom = { 0 }; + + if (isa_file) { + fd = libxfs_device_to_fd(x.ddev); + + if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { + do_log(_("Cannot get host filesystem geometry.\n" + "Repair may fail if there is a sector size mismatch between\n" + "the image and the host filesystem.\n")); + geom.sectsize = BBSIZE; + } + + if (sb->sb_sectsize < geom.sectsize) { + old_flags = fcntl(fd, F_GETFL, 0); + if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { + do_warn(_( + "Sector size on host filesystem larger than image sector size.\n" + "Cannot turn off direct IO, so exiting.\n")); + exit(1); + } + } + } +} + int main(int argc, char **argv) { @@ -657,6 +693,23 @@ main(int argc, char **argv) timestamp(PHASE_START, 0, NULL); timestamp(PHASE_END, 0, NULL); + /* -f forces this, but let's be nice and autodetect it, as well. */ + if (!isa_file) { + int fd = libxfs_device_to_fd(x.ddev); + struct stat statbuf; + + if (fstat(fd, &statbuf) < 0) + do_warn(_("%s: couldn't stat \"%s\"\n"), + progname, fs_name); + else if (S_ISREG(statbuf.st_mode)) + isa_file = 1; + } + + rval = get_sb(&psb, 0, XFS_MAX_SECTORSIZE, 0); + if (rval == XR_OK) { + check_geometry_sectsize(&psb); + } + /* do phase1 to make sure we have a superblock */ phase1(temp_mp); timestamp(PHASE_END, 1, NULL); @@ -674,48 +727,7 @@ main(int argc, char **argv) "Exiting now.\n")); exit(1); } - - /* -f forces this, but let's be nice and autodetect it, as well. */ - if (!isa_file) { - int fd = libxfs_device_to_fd(x.ddev); - struct stat statbuf; - - if (fstat(fd, &statbuf) < 0) - do_warn(_("%s: couldn't stat \"%s\"\n"), - progname, fs_name); - else if (S_ISREG(statbuf.st_mode)) - isa_file = 1; - } - - /* - * if the sector size of the filesystem we are trying to repair is - * smaller than that of the underlying filesystem (i.e. we are repairing - * an image), the we have to turn off direct IO because we cannot do IO - * smaller than the host filesystem's sector size. - */ - if (isa_file) { - int fd = libxfs_device_to_fd(x.ddev); - struct xfs_fsop_geom_v1 geom = { 0 }; - - if (ioctl(fd, XFS_IOC_FSGEOMETRY_V1, &geom) < 0) { - do_log(_("Cannot get host filesystem geometry.\n" - "Repair may fail if there is a sector size mismatch between\n" - "the image and the host filesystem.\n")); - geom.sectsize = BBSIZE; - } - - if (psb.sb_sectsize < geom.sectsize) { - long old_flags; - - old_flags = fcntl(fd, F_GETFL, 0); - if (fcntl(fd, F_SETFL, old_flags & ~O_DIRECT) < 0) { - do_warn(_( - "Sector size on host filesystem larger than image sector size.\n" - "Cannot turn off direct IO, so exiting.\n")); - exit(1); - } - } - } + check_geometry_sectsize(&psb); /* * Prepare the mount structure. Point the log reference to our local
Due to xfs_repair uses direct IO, sometimes it can't read superblock from an image file has smaller sector size than host filesystem. Especially that superblock doesn't align with host filesystem's sector size. Fortunately, xfsprogs already has code to do isa_file and geometry check in xfs_repair.c, it turns off O_DIRECT after phase1() if the sector size is less than the host filesystem's geometry. So move the isa_file auto detection over up the phase1(), and try to do once geometry check before phase1() if get_sb() return OK. Signed-off-by: Zorro Lang <zlang@redhat.com> --- Hi, V2 did a stupid change, it tried to check superblock before get_sb(). So V3 fix this problem by below changes: 1) move the "if (!isa_file)" auto detection over up the phase1(). 2) try to get_sb() before phase1, and check the sector size. Turn off the O_DIRECT if the sector size is smaller than the underlying filesystem. 3) The step#2 maybe fail, due to can't get a valid primary superblock. So keep the similar steps after phase1(), I didn't remove it. Thanks, Zorro repair/xfs_repair.c | 96 ++++++++++++++++++++++++++++++----------------------- 1 file changed, 54 insertions(+), 42 deletions(-)