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TARFS(5) File Formats Manual TARFS(5) NAME tarfs -- tarball filesystem SYNOPSIS To compile this driver into the kernel, place the following line in your kernel configuration file: options TARFS Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): tarfs_load="YES" DESCRIPTION The tarfs driver implements a read-only filesystem backed by a tar(5) file. Currently, only POSIX archives, optionally compressed with zstd(1), are supported. The preferred I/O size for tarfs filesystems can be adjusted using the vfs.tarfs.ioshift sysctl setting and tunable. Setting it to 0 will re- set it to its default value. Note that changes to this setting only apply to filesystems mounted after the change. DIAGNOSTICS If enabled by the TARFS_DEBUG kernel option, the vfs.tarfs.debug sysctl setting can be used to control debugging output from the tarfs driver. Debugging output for individual sections of the driver can be enabled by adding together the relevant values from the table below. 0x01 Memory allocations 0x02 Checksum calculations 0x04 Filesystem operations (vfsops) 0x08 Path lookups 0x10 File operations (vnops) 0x20 General I/O 0x40 Decompression 0x80 Decompression index 0x100 Sparse file mapping 0x200 Bounce buffer usage SEE ALSO tar(1), zstd(1), fstab(5), tar(5), mount(8), sysctl(8) HISTORY The tarfs driver was developed by Stephen J. Kiernan <stevek@FreeBSD.org> and Dag-Erling Smrgrav <des@FreeBSD.org> for Ju- niper Networks and Klara Systems. This manual page was written by Dag-Erling Smrgrav <des@FreeBSD.org> for Juniper Networks and Klara Systems. FreeBSD 13.2 February 14, 2023 TARFS(5)
NAME | SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | HISTORY
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