path: root/lib/libufs/cgroup.c
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* Fix for tunefs(8) unable to add a UFS/FFS soft update journal.Kirk McKusick2022-11-121-0/+4
| | | | | | | | | | | | | | | The reported bug is UFS: bad file descriptor: soft update journaling can not be enabled on some FreeBSD-provided disk images – failed to write updated cg. The UFS library (libufs(3)) failed to reopen its disk descriptor when first attempting to update a cylinder group. The error only occurred when trying to add journaling to a filesystem whose first cylinder group was too full to hold the journal. PR: 259090 MFC after: 1 week Sponsored by: The FreeBSD Foundation
* Remove #define _KERNEL hacks from libprocstatKonstantin Belousov2021-02-211-0/+2
| | | | | | | | | | | | | | | | | | Make sys/buf.h, sys/pipe.h, sys/fs/devfs/devfs*.h headers usable in userspace, assuming that the consumer has an idea what it is for. Unhide more material from sys/mount.h and sys/ufs/ufs/inode.h, sys/ufs/ufs/ufsmount.h for consumption of userspace tools, with the same caveat. Remove unacceptable hack from usr.sbin/makefs which relied on sys/buf.h being unusable in userspace, where it override struct buf with its own definition. Instead, provide struct m_buf and struct m_vnode and adapt code to use local variants. Reviewed by: mckusick Tested by: pho Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D28679
* Update the libufs cgget() and cgput() interfaces to have a similarKirk McKusick2020-09-191-19/+65
| | | | | | | | | | | | | | API to the sbget() and sbput() interfaces. Specifically they take a file descriptor pointer rather than the struct uufsd *disk pointer used by the libufs cgread() and cgwrite() interfaces. Update fsck_ffs to use these revised interfaces. No functional changes intended. Sponsored by: Netflix Notes: svn path=/head/; revision=365919
* Correct fsck journal-recovery code to update a cylinder-groupKirk McKusick2018-01-171-15/+53
| | | | | | | | | | | | | | | | | | | check-hash after making changes to the cylinder group. The problem was that the journal-recovery code was calling the libufs bwrite() function instead of the cgput() function. The cgput() function updates the cylinder-group check-hash before writing the cylinder group. This change required the additions of the cgget() and cgput() functions to the libufs API to avoid a gratuitous bcopy of every cylinder group to be read or written. These new functions have been added to the libufs manual pages. This was the first opportunity that I have had to use and document the use of the EDOOFUS error code. Reviewed by: kib Reported by: emaste and others Notes: svn path=/head/; revision=328092
* lib: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-261-1/+3
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326219
* Continuing efforts to provide hardening of FFS, this change adds aKirk McKusick2017-09-221-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | check hash to cylinder groups. If a check hash fails when a cylinder group is read, no further allocations are attempted in that cylinder group until it has been fixed by fsck. This avoids a class of filesystem panics related to corrupted cylinder group maps. The hash is done using crc32c. Check hases are added only to UFS2 and not to UFS1 as UFS1 is primarily used in embedded systems with small memories and low-powered processors which need as light-weight a filesystem as possible. Specifics of the changes: sys/sys/buf.h: Add BX_FSPRIV to reserve a set of eight b_xflags that may be used by individual filesystems for their own purpose. Their specific definitions are found in the header files for each filesystem that uses them. Also add fields to struct buf as noted below. sys/kern/vfs_bio.c: It is only necessary to compute a check hash for a cylinder group when it is actually read from disk. When calling bread, you do not know whether the buffer was found in the cache or read. So a new flag (GB_CKHASH) and a pointer to a function to perform the hash has been added to breadn_flags to say that the function should be called to calculate a hash if the data has been read. The check hash is placed in b_ckhash and the B_CKHASH flag is set to indicate that a read was done and a check hash calculated. Though a rather elaborate mechanism, it should also work for check hashing other metadata in the future. A kernel internal API change was to change breada into a static fucntion and add flags and a function pointer to a check-hash function. sys/ufs/ffs/fs.h: Add flags for types of check hashes; stored in a new word in the superblock. Define corresponding BX_ flags for the different types of check hashes. Add a check hash word in the cylinder group. sys/ufs/ffs/ffs_alloc.c: In ffs_getcg do the dance with breadn_flags to get a check hash and if one is provided, check it. sys/ufs/ffs/ffs_vfsops.c: Copy across the BX_FFSTYPES flags in background writes. Update the check hash when writing out buffers that need them. sys/ufs/ffs/ffs_snapshot.c: Recompute check hash when updating snapshot cylinder groups. sys/libkern/crc32.c: lib/libufs/Makefile: lib/libufs/libufs.h: lib/libufs/cgroup.c: Include libkern/crc32.c in libufs and use it to compute check hashes when updating cylinder groups. Four utilities are affected: sbin/newfs/mkfs.c: Add the check hashes when building the cylinder groups. sbin/fsck_ffs/fsck.h: sbin/fsck_ffs/fsutil.c: Verify and update check hashes when checking and writing cylinder groups. sbin/fsck_ffs/pass5.c: Offer to add check hashes to existing filesystems. Precompute check hashes when rebuilding cylinder group (although this will be done when it is written in fsutil.c it is necessary to do it early before comparing with the old cylinder group) sbin/dumpfs/dumpfs.c Print out the new check hash flag(s) sbin/fsdb/Makefile: Needs to add libufs now used by pass5.c imported from fsck_ffs. Reviewed by: kib Tested by: Peter Holm (pho) Notes: svn path=/head/; revision=323923
* libufs: Simplify generation number calculation.Pedro F. Giffuni2016-05-181-1/+1
| | | | | | | UFS generation numbers have been unsigned since 2013 (r256435). Notes: svn path=/head/; revision=300163
* Search beyond the first 1/8th of inodes.Ed Maste2010-05-011-1/+1
| | | | | | | Submitted by: jeff Notes: svn path=/head/; revision=207476
* - Merge soft-updates journaling from projects/suj/head into head. ThisJeff Roberson2010-04-241-2/+138
| | | | | | | | | | | brings in support for an optional intent log which eliminates the need for background fsck on unclean shutdown. Sponsored by: iXsystems, Yahoo!, and Juniper. With help from: McKusick and Peter Holm Notes: svn path=/head/; revision=207141
* Keep Tinderbox happy.Kirk McKusick2010-02-111-1/+1
| | | | Notes: svn path=/head/; revision=203768
* Implement cgwrite1(3) function which stored a given cylinder group on disk.Pawel Jakub Dawidek2006-10-311-0/+14
| | | | | | | Sponsored by: home.pl Notes: svn path=/head/; revision=163835
* Reduce diffs with code in Perforce:Juli Mallett2003-06-091-4/+4
| | | | | | | Parenthesise return values. Notes: svn path=/head/; revision=116084
* Store not only the current cylinder group in the series (i.e. next that needsJuli Mallett2003-01-191-0/+1
| | | | | | | | to be read in) but also the last cylinder group in the series (i.e. what is stored in the structure). Notes: svn path=/head/; revision=109518
* Add facility to read one, or a string of, cylinger groups.Juli Mallett2003-01-191-0/+72
Notes: svn path=/head/; revision=109509