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Andreas Dilger
baab063016
Due to the confusion in Linux statfs between f_frsize and f_bsize the blocks counts were changed to be in units of z_max_blksize instead of SPA_MINBLOCKSIZE as it is on other platforms. However, the free files calculation in zfs_statvfs() is limited by the free blocks count, since each dnode consumes one block/sector. This provided a reasonable estimate of free inodes, but on Linux this meant that the free inodes count was underestimated by a large amount, since 256 512-byte dnodes can fit into a 128kB block, and more if the max blocksize is increased to 1MB or larger. Also, the use of SPA_MINBLOCKSIZE is semantically incorrect since DNODE_SIZE may change to a value other than SPA_MINBLOCKSIZE and may even change per dataset, and devices with large sectors setting ashift will also use a larger blocksize. Correct the f_ffree calculation to use (availbytes >> DNODE_SHIFT) to more accurately compute the maximum number of dnodes that can be created. Signed-off-by: Andreas Dilger <adilger@whamcloud.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #413 Closes #400
Native ZFS for Linux! ZFS is an advanced file system and volume manager which was originally developed for Solaris. It has been successfully ported to FreeBSD and now there is a functional Linux ZFS kernel port too. The port currently includes a fully functional and stable SPA, DMU, and ZVOL with a ZFS Posix Layer (ZPL) on the way!
$ ./configure
$ make pkg
Full documentation for building, configuring, and using ZFS can be found at: http://zfsonlinux.org