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Code Releases Activity

o Lock mechanism for LV activation

Browse Source 
o #defines for common lock flag combinations
o Try out hyphens instead of colons in device-mapper names - does this
  make messages containing filenames easier to read?
This commit is contained in:
Alasdair Kergon
2002-02-27 12:26:41 +00:00
parent aaed82738a
commit 73a88ab3d3
18 changed files with 183 additions and 113 deletions
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17
lib/locking/locking.h
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@@ -20,7 +20,9 @@ void fin_locking(void);
*
* LCK_LV:
* Lock/unlock an individual logical volume
* Also suspends/resumes the LV if it's active.
* If it's active, LCK_WRITE suspends it; LCK_EXCLUSIVE deactivates it;
* LCK_NONE unsuspends it.
* LCK_READ activates it.
* char *vol holds "VG_name/LV_uuid"
*
* FIXME: Change to something like
@@ -35,6 +37,7 @@ int lock_vol(struct cmd_context *cmd, const char *vol, int flags);
#define LCK_NONE 0x00000000
#define LCK_READ 0x00000001
#define LCK_WRITE 0x00000002
#define LCK_EXCL 0x00000003
/*
* Lock scope
@@ -48,3 +51,15 @@ int lock_vol(struct cmd_context *cmd, const char *vol, int flags);
*/
#define LCK_NONBLOCK 0x00010000
/*
* Common combinations
*/
#define LCK_VG_READ (LCK_VG | LCK_READ)
#define LCK_VG_WRITE (LCK_VG | LCK_WRITE)
#define LCK_VG_UNLOCK (LCK_VG | LCK_NONE)
#define LCK_LV_DEACTIVATE (LCK_LV | LCK_EXCL)
#define LCK_LV_SUSPEND (LCK_LV | LCK_WRITE)
#define LCK_LV_ACTIVATE (LCK_LV | LCK_READ)
#define LCK_LV_UNLOCK (LCK_LV | LCK_NONE)