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mirror of git://sourceware.org/git/lvm2.git synced 2024-12-22 17:35:59 +03:00
lvm2/lib/metadata
Dave Wysochanski 10a27bdfb6 Change vg_create() to take only minimal parameters and obtain a lock.
vg_t *vg_create(struct cmd_context *cmd, const char *vg_name);
This is the first step towards the API called to create a VG.
Call vg_lock_newname() inside this function.  Use _vg_make_handle()
where possible.
Now we have 2 ways to construct a volume group:
1) vg_read: Used when constructing an existing VG from disks
2) vg_create: Used when constructing a new VG
Both of these interfaces obtain a lock, and return a vg_t *.
The usage of _vg_make_handle() inside vg_create() doesn't fit
perfectly but it's ok for now.  Needs some cleanup though and I've
noted "FIXME" in the code.

Add the new vg_create() plus vg 'set' functions for non-default
VG parameters in the following tools:
- vgcreate: Fairly straightforward refactoring.  We just moved
vg_lock_newname inside vg_create so we check the return via
vg_read_error.
- vgsplit: The refactoring here is a bit more tricky.  Originally
we called vg_lock_newname and depending on the error code, we either
read the existing vg or created the new one.  Now vg_create()
calls vg_lock_newname, so we first try to create the VG.  If this
fails with FAILED_EXIST, we can then do the vg_read.  If the
create succeeds, we check the input parameters and set any new
values on the VG.

TODO in future patches:
1. The VG_ORPHAN lock needs some thought.  We may want to treat
this as any other VG, and require the application to obtain a handle
and pass it to other API calls (for example, vg_extend).  Or,
we may find that hiding the VG_ORPHAN lock inside other APIs is
the way to go.  I thought of placing the VG_ORPHAN lock inside
vg_create() and tying it to the vg handle, but was not certain
this was the right approach.
2. Cleanup error paths. Integrate vg_read_error() with vg_create and
vg_read* error codes and/or the new error APIs.

Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
2009-07-09 10:09:33 +00:00
..
lv_alloc.h Calculate mirror log size instead of hardcoding 1 extent size. 2008-12-19 15:24:52 +00:00
lv_manip.c Suspend virtual origin before real snapshot. 2009-06-06 16:37:15 +00:00
merge.c Right, a simple build (without options) is working again. 2008-11-03 22:14:30 +00:00
metadata-exported.h Change vg_create() to take only minimal parameters and obtain a lock. 2009-07-09 10:09:33 +00:00
metadata.c Change vg_create() to take only minimal parameters and obtain a lock. 2009-07-09 10:09:33 +00:00
metadata.h Fix readahead calculation problems. 2009-06-01 12:43:31 +00:00
mirror.c Fix convert polling to ignore LV with different UUID. 2009-06-01 14:43:27 +00:00
pv_alloc.h Right, a simple build (without options) is working again. 2008-11-03 22:14:30 +00:00
pv_manip.c Right, a simple build (without options) is working again. 2008-11-03 22:14:30 +00:00
pv_map.c Do not include MISSING_PVs in allocation maps. 2009-04-23 16:41:27 +00:00
pv_map.h Right, a simple build (without options) is working again. 2008-11-03 22:14:30 +00:00
segtype.c Right, a simple build (without options) is working again. 2008-11-03 22:14:30 +00:00
segtype.h Permit several segment types to be registered by a single shared object. 2009-07-08 12:36:01 +00:00
snapshot_manip.c Pre-release cleanups. 2009-05-21 03:04:52 +00:00