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Commit Graph

35 Commits

Author SHA1 Message Date
David Teigland
a7cb76ae94 scan: use bcache for label scan and vg read
New label_scan function populates bcache for each device
on the system.

The two read paths are updated to get data from bcache.

The bcache is not yet used for writing.  bcache blocks
for a device are invalidated when the device is written.
2018-04-20 11:19:24 -05:00
Joe Thornber
00f1b208a1 [io paths] Unpick agk's aio stuff 2018-04-20 11:03:58 -05:00
Alasdair G Kergon
9194610f42 device: Add ioflags parameter to transfer additional state.
Flags are set on the initial I/O and passed to any callbacks that
may in turn issue further I/O using the inherited flags.
2018-01-21 21:10:23 +00:00
Alasdair G Kergon
35cdd9cf48 label: Clean up storing of device and label sector.
No longer use the external 'result' pointer internally to set up the
cached label.  The callback _set_label_read_result() is now given the
internal label pointer directly

Callers that don't need the result are no longer required to pass a
label pointer into label_read().
2018-01-11 02:54:00 +00:00
Alasdair G Kergon
6210c1ec28 device: Mark read-only device buffers const. 2018-01-10 19:57:10 +00:00
Alasdair G Kergon
4b02d4e22e label: Add label_read callback. 2018-01-08 23:30:50 +00:00
Alasdair G Kergon
6d322e68f3 label: Add callback fns (partially) 2018-01-08 17:04:56 +00:00
Alasdair G Kergon
a9812ec9d3 label: Remove unused verify functions.
label_verify has never been used so remove it.
2017-11-28 01:36:55 +00:00
Zdenek Kabelac
fcbef05aae doc: change fsf address
Hmm rpmlint suggest fsf is using a different address these days,
so lets keep it up-to-date
2016-01-21 12:11:37 +01:00
Alasdair G Kergon
6407d184d1 cache: Store metadata size and checksum.
Refactor the recent metadata-reading optimisation patches.

Remove the recently-added cache fields from struct labeller
and struct format_instance.

Instead, introduce struct lvmcache_vgsummary to wrap the VG information
that lvmcache holds and add the metadata size and checksum to it.

Allow this VG summary information to be looked up by metadata size +
checksum.  Adjust the debug log messages to make it clear when this
shortcut has been successful.

(This changes the optimisation slightly, and might be extendable
further.)

Add struct cached_vg_fmtdata to format-specific vg_read calls to
preserve state alongside the VG across separate calls and indicate
if the details supplied match, avoiding the need to read and
process the VG metadata again.
2015-03-18 23:43:02 +00:00
Zdenek Kabelac
a9b28a4f21 lib: reduce parsing in vgname_from_mda
Use similar logic as with text_vg_import_fd() and avoid repeated
parsing of same mda and its config tree for vgname_from_mda().

Remember last parsed vgname, vgid and creation_host in labeller
structure and if the  metadata have the same size and checksum,
return this stored info.

TODO: The reuse of labeller struct is not ideal, some lvmcache API for
this functionality would be nicer.
2015-03-06 13:53:13 +01:00
Zdenek Kabelac
b8f72c0f2c cleanup: use const format 2013-11-22 21:00:56 +01:00
Petr Rockai
cc633c84cf label: Track a device pointer in struct label. 2013-11-17 21:41:27 +01:00
Petr Rockai
9b91977f4e labeller: Make the use of "private" as "fmt" explicit.
All labellers always use the "private" (void *) field as the fmt pointer. Making
this fact explicit in the type of the labeller simplifies the label reporting
code which needs to extract the format. Moreover, it removes a number of
error-prone casts from the code.
2013-11-17 21:41:27 +01:00
Petr Rockai
dae0822698 The lvmetad client-side integration. Only active when use_lvmetad = 1 is set in
lvm.conf *and* lvmetad is running.
2012-02-23 13:11:07 +00:00
Alasdair Kergon
be6845999b Fix inconsistent licence notices: executables are GPLv2; libraries LGPLv2.1. 2007-08-20 20:55:30 +00:00
Dave Wysochanski
17a6fc0b45 Add 'scan_sector' parameter to label_read and _find_labeller to add
flexibility in searching for disk labels.
2007-04-23 18:21:01 +00:00
Alasdair Kergon
4dc0ec2253 Adjust some alignments for ia64 and sparc.
(Some of the changes are probably unnecessary.)
2006-11-30 23:11:42 +00:00
Alasdair Kergon
72b2cb613a Make SIZE_SHORT the default for display_size().
Fix some memory leaks in error paths found by coverity.
Use C99 struct initialisers.
Move DEFS into configure.h.
Clean-ups to remove miscellaneous compiler warnings.
2006-05-09 21:23:51 +00:00
Alasdair Kergon
4922197a33 Begin to separate out segment types. 2004-05-04 21:25:57 +00:00
Alasdair Kergon
6606c3ae81 Update copyright notices. 2004-03-30 19:35:44 +00:00
Alasdair Kergon
914c97239f Another sync point - numerous fixes & clean ups. 2003-07-04 22:34:56 +00:00
Alasdair Kergon
26e7f2e0c4 Tidy various pre-processing incl. making libdl optional. 2003-03-24 18:08:53 +00:00
Alasdair Kergon
8ef2b021ed Default stripesize 64k & config file setting for it;
Clear many compiler warnings (i386) & associated bugs - hopefully without
introducing too many new bugs:-)  (Same exercise required for other archs.)
Default compilation has optimisation - or else use ./configure --enable-debug
2002-12-19 23:25:55 +00:00
Alasdair Kergon
5a52dca9c2 Some new features. 2002-11-18 14:04:08 +00:00
Joe Thornber
f2f2634990 o vgcfgrestore works ! (with the couple of examples I tried). 2002-01-15 17:37:23 +00:00
Joe Thornber
6036e5e0f7 o split the uuid -> device map out from vgcache
o  roll vgcache back to agk's implementation, we'll revisit this as part
   of the cluster integration.

o  change the extra_info field in a label to be a void *
2002-01-15 10:24:48 +00:00
Joe Thornber
493656dd3c o label.c now compiles. 2002-01-11 10:43:32 +00:00
Joe Thornber
c6cc24ea3f o _read_id function for import.c 2002-01-10 18:12:26 +00:00
Alasdair Kergon
7e56005011 More steps towards successful compilation. 2002-01-10 16:48:28 +00:00
Joe Thornber
fc63d04f42 o Moved the current label.[hc] sideways to lvm2_label.[hc]
o  First pass at low level labelling switch.  This allows us to
   register different label types (eg, lvm1, lvm2).
2002-01-10 15:01:58 +00:00
Patrick Caulfield
515df8784a Write the location of both labels in the labels so we can check them. I don't do
much with this ATM (apart from check that they all match up).
Use a different CRC routine.
2001-12-14 13:15:15 +00:00
Patrick Caulfield
8a51c23765 Use a proper CRC calculation. 2001-12-12 09:05:44 +00:00
Patrick Caulfield
f4a7ce7c49 - Change label format to include a string disk_type and a version number.
- The iterator can find labels by string and also appropriate version number (==,
  <= or any) if you want.
- Add labels_match() call that compares the two labels and returns an error if
  they do not match.
- Write labels in sector 1 & last rather than 2 & last as per Joe.
2001-12-11 16:49:40 +00:00
Patrick Caulfield
3dd5cbe54f Label reading/writing code.
Not tested the filter yet.
2001-12-11 11:42:30 +00:00