CVS log for src/sys/ufs/ffs/ffs_quota2.c

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Default branch: MAIN

Revision 1.2.4.1 / (download) - annotate - [select for diffs], Thu Jun 23 14:20:30 2011 UTC (22 months, 4 weeks ago) by cherry
Branch: cherry-xenmp
Changes since 1.2: +6 -8 lines
Diff to previous 1.2 (colored) next main 1.3 (colored)

Catchup with rmind-uvmplock merge.

Welcome to 5.99.53!  Merge rmind-uvmplock branch:

- Reorganize locking in UVM and provide extra serialisation for pmap(9).
  New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
  the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
  Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
  kernel-lock on some ports).  Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.

Revision 1.2.2.4 / (download) - annotate - [select for diffs], Sun Jun 12 00:24:31 2011 UTC (23 months, 1 week ago) by rmind
Branch: rmind-uvmplock
Changes since 1.2.2.3: +2 -4 lines
Diff to previous 1.2.2.3 (colored) to branchpoint 1.2 (colored) next main 1.3 (colored)

sync with head

Revision 1.3 / (download) - annotate - [select for diffs], Tue Jun 7 14:56:13 2011 UTC (23 months, 2 weeks ago) by bouyer
Branch: MAIN
CVS Tags: rmind-uvmplock-nbase, rmind-uvmplock-base
Changes since 1.2: +2 -4 lines
Diff to previous 1.2 (colored)

Fix bad cut'n'paste in copyright. Pointed out by dyoung@

Revision 1.2.6.2 / (download) - annotate - [select for diffs], Mon Jun 6 09:10:16 2011 UTC (23 months, 2 weeks ago) by jruoho
Branch: jruoho-x86intr
Changes since 1.2.6.1: +120 -0 lines
Diff to previous 1.2.6.1 (colored) to branchpoint 1.2 (colored) next main 1.3 (colored)

Sync with HEAD.

Revision 1.2.2.3 / (download) - annotate - [select for diffs], Sat Apr 23 15:35:25 2011 UTC (2 years, 1 month ago) by rmind
Branch: rmind-uvmplock
Changes since 1.2.2.2: +6 -6 lines
Diff to previous 1.2.2.2 (colored) to branchpoint 1.2 (colored)

Few fixes, missed in last sync with head.

Revision 1.2.2.2 / (download) - annotate - [select for diffs], Thu Apr 21 01:42:20 2011 UTC (2 years, 1 month ago) by rmind
Branch: rmind-uvmplock
Changes since 1.2.2.1: +120 -0 lines
Diff to previous 1.2.2.1 (colored) to branchpoint 1.2 (colored)

sync with head

Revision 1.2.6.1, Sun Mar 6 17:08:38 2011 UTC (2 years, 2 months ago) by jruoho
Branch: jruoho-x86intr
Changes since 1.2: +0 -120 lines
FILE REMOVED

file ffs_quota2.c was added on branch jruoho-x86intr on 2011-06-06 09:10:16 +0000

Revision 1.2.2.1, Sun Mar 6 17:08:38 2011 UTC (2 years, 2 months ago) by rmind
Branch: rmind-uvmplock
Changes since 1.2: +0 -120 lines
FILE REMOVED

file ffs_quota2.c was added on branch rmind-uvmplock on 2011-04-21 01:42:20 +0000

Revision 1.2 / (download) - annotate - [select for diffs], Sun Mar 6 17:08:38 2011 UTC (2 years, 2 months ago) by bouyer
Branch: MAIN
CVS Tags: cherry-xenmp-base
Branch point for: rmind-uvmplock, jruoho-x86intr, cherry-xenmp
Changes since 1.1: +120 -0 lines
Diff to previous 1.1 (colored)

merge the bouyer-quota2 branch. This adds a new on-disk format
to store disk quota usage and limits, integrated with ffs
metadata. Usage is checked by fsck_ffs (no more quotacheck)
and is covered by the WAPBL journal. Enabled with kernel
option QUOTA2 (added where QUOTA was enabled in kernel config files),
turned on with tunefs(8) on a per-filesystem
basis. mount_mfs(8) can also turn quotas on.

See http://mail-index.netbsd.org/tech-kern/2011/02/19/msg010025.html
for details.

Revision 1.1.2.2 / (download) - annotate - [select for diffs], Wed Feb 9 19:49:44 2011 UTC (2 years, 3 months ago) by bouyer
Branch: bouyer-quota2
Changes since 1.1.2.1: +6 -4 lines
Diff to previous 1.1.2.1 (colored) to branchpoint 1.1 (colored) next main 1.2 (colored)

Support MNT_UPDATE for quota2 (especially r/o -> r/w transitions)

Revision 1.1.2.1 / (download) - annotate - [select for diffs], Thu Jan 20 14:25:02 2011 UTC (2 years, 4 months ago) by bouyer
Branch: bouyer-quota2
Changes since 1.1: +118 -0 lines
Diff to previous 1.1 (colored)

Snapshot of work in progress on a modernised disk quota system:
- new quotactl syscall (versionned for backward compat), which takes
  as parameter a path to a mount point, and a prop_dictionary
  (in plistref format) describing commands and arguments.
  For each command, status and data are returned as a prop_dictionary.
  quota commands features will be added to take advantage of this,
  exporting quota data or getting quota commands as plists.

- new on disk-format storage (all 64bit wide), integrated to metadata for
  ffs (and playing nicely with wapbl).
  Quotas are enabled on a ffs filesystem via superblock flags.
  tunefs(8) can enable or disable quotas.
  On a quota-enabled filesystem, fsck_ffs(8) will track per-uid/gid
  block and inode usages, and will check and update quotas in Pass 6.
  quota usage and limits are stored in unliked files (one for users,
  one for groups)l fsck_ffs(8) will create the files if needed, or
  free them if needed. This means that after enabling or disabling
  quotas on a filesystem; a fsck_ffs(8) run is required.
  quotacheck(8) is not needed any more, on a unclean shutdown
  fsck or journal replay will take care of fixing quotas.
  newfs(8) can create a ready-to-mount quota-enabled filesystem
  (superblock flags are set and quota inodes are created).
  Other new features or semantic changes:
  - default quota datas, applied to users or groups which don't already
    have a quota entry
  - per-user/group grace time (instead of a filesystem global one)
  - 0 really means "nothing allowed at all", not "no limit".
    If you want "no limit", set the limit to UQUAD_MAX (tools will
    understand "unlimited" and "-")

  A quota file is structured as follow:
  it starts with a header, containing a few per-filesystem values,
  and the default quota limits.
  Quota entries are linked together as a simple list, each entry has a
  pointer (as an offset withing the file) to the next.
  The header has a pointer to a list of free quota entries, and
  a hash table of in-use entries. The size of the hash table depends
  on the filesystem block size (header+hash table should fit in the
  first block). The file is not sparse and is a multiple of
  filesystem block size (when the free quota entry list is empty a new
  filesystem block is allocated). quota entries to not cross
  filesystem block boundaries.

  In memory, the kernel keeps a cache of recently used quota entries
  as a reference to the block number, and offset withing the block.
  The quota entry itself is keept in the buf cache.

fsck_ffs(8), tunefs(8) and newfs(8) supports are completed (with
related atf tests :)
The kernel can update disk usage and report it via quotactl(2).

Todo: enforce quotas limits (limits are not checked by kernel yet)
      update repquota, edquota and rpc.rquotad to the new world
      implement compat_50_quotactl ioctl.
      update quotactl(2) man page

fsck_ffs required fixes so that allocating new blocks or inodes will
properly update the superblock and cg sumaries. This was not an issue up
to now because superblock and cg sumaries check happened last, but now
allocations or frees can happen in pass 6.

Revision 1.1, Thu Jan 20 14:25:02 2011 UTC (2 years, 4 months ago) by bouyer
Branch: MAIN
CVS Tags: bouyer-quota2-nbase, bouyer-quota2-base
Branch point for: bouyer-quota2
FILE REMOVED

file ffs_quota2.c was initially added on branch bouyer-quota2.

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