Mark Johnston 268afe7247 tarfs: Implement VOP_BMAP ... This lets tarfs provide readahead/behind hints to the VFS, which helps memory-mapped I/O performance, important when running faulting in executables out of a tarfs mount as one might if tarfs is used to back the root filesystem, for example. The improvement is particularly noticeable when the backing tarball is zstd-compressed. The implementation simply returns the extent of the virtual block containing the target offset, clamped by the maximum I/O size. This is perhaps simplistic; it effectively just chooses values that would correspond to a single VOP_READ call in tarfs_read_file(). Reviewed by: des, kib MFC after: 1 month Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D44626 (cherry picked from commit a0895e394d3fec374e61a207bdfa0245dae86f53)		2024-04-15 10:06:12 -04:00
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tarfs.h	vfs: use __enum_uint8 for vtype and vstate	2023-07-05 15:06:30 +00:00
tarfs_dbg.h	tarfs: Use a separate debug bit for bounce buffer usage.	2023-02-16 00:40:45 +00:00
tarfs_io.c	tarfs: Don't use IO_DIRECT when reading from tarball.	2023-06-20 10:02:10 +00:00
tarfs_subr.c	vfs: use __enum_uint8 for vtype and vstate	2023-07-05 15:06:30 +00:00
tarfs_vfsops.c	tarfs: Inherit mnt_iosize_max from the lower vnode	2024-04-15 10:05:13 -04:00
tarfs_vnops.c	tarfs: Implement VOP_BMAP	2024-04-15 10:06:12 -04:00