shaba/lvm2
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Code Releases Activity

Allow offline extension of snapshot volumes.

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NB Requires kernel patch that is not upstream.
This commit is contained in:
Alasdair Kergon
2005-04-07 12:17:46 +00:00
parent e20e52a4b2
commit 89109ded53
4 changed files with 47 additions and 11 deletions
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29
lib/device/dev-io.c
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@@ -330,8 +330,13 @@ int dev_open_flags(struct device *dev, int flags, int direct, int quiet)
}
#ifdef O_DIRECT_SUPPORT
if (direct)
flags |= O_DIRECT;
if (direct) {
if (!(dev->flags & DEV_O_DIRECT_TESTED))
dev->flags |= DEV_O_DIRECT;
if ((dev->flags & DEV_O_DIRECT))
flags |= O_DIRECT;
}
#endif
#ifdef O_NOATIME
@@ -341,6 +346,16 @@ int dev_open_flags(struct device *dev, int flags, int direct, int quiet)
#endif
if ((dev->fd = open(name, flags, 0777)) < 0) {
#ifdef O_DIRECT_SUPPORT
if (direct && !(dev->flags & DEV_O_DIRECT_TESTED)) {
flags &= ~O_DIRECT;
if ((dev->fd = open(name, flags, 0777)) >= 0) {
dev->flags &= ~DEV_O_DIRECT;
log_debug("%s: Not using O_DIRECT", name);
goto opened;
}
}
#endif
if (quiet)
log_sys_debug("open", name);
else
@@ -348,8 +363,13 @@ int dev_open_flags(struct device *dev, int flags, int direct, int quiet)
return 0;
}
opened:
dev->open_count++;
dev->flags &= ~DEV_ACCESSED_W;
#ifdef O_DIRECT_SUPPORT
if (direct)
dev->flags |= DEV_O_DIRECT_TESTED;
#endif
if ((flags & O_ACCMODE) == O_RDWR)
dev->flags |= DEV_OPENED_RW;
else
@@ -373,8 +393,9 @@ int dev_open_flags(struct device *dev, int flags, int direct, int quiet)
list_add(&_open_devices, &dev->open_list);
log_debug("Opened %s %s", dev_name(dev),
dev->flags & DEV_OPENED_RW ? "RW" : "RO");
log_debug("Opened %s %s%s", dev_name(dev),
dev->flags & DEV_OPENED_RW ? "RW" : "RO",
dev->flags & DEV_O_DIRECT ? " O_DIRECT" : "");
return 1;
}