| Commit message (Collapse) | Author | Age | Files | Lines |
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License texts contain multiple address for FSF, some wrong.
So update them and replace COPYING file with
http://www.gnu.org/licenses/gpl-2.0.txt
which has a few changes to preamble and commentary.
Also remove extra COPYING file from utils/statd/
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Recently commit 0dcb83a8 changed the po_rightmost() function to
distinguish among several possible mount options by taking a table
containing the alternatives, and returning the table index of the
entry which is rightmost in the mount option string.
If it didn't find any mount option that matches an entry from the
passed-in table, it returned zero. This was the same behavior it had
before, when it only checked for two options at a time. It returned
PO_NEITHER_FOUND, which was zero.
Since this is C, however, zero also happens to be a valid index into
the passed-in array of options.
Modify the po_rightmost() function to return -1 if the entry wasn't
found, and fix up the callers to look for a C-style array index that
starts at zero.
Thanks to Steve Dickson for troubleshooting the problem. His solution
was merely to bump the return value, as callers already expected an
ordinal index instead of a C-style index.
I prefer this equivalent but slightly more extensive change because it
makes the behavior of po_rightmost() more closely match how humans
understand C arrays to work. Let's address some of the confusion that
caused this bug, as well as fixing the run-time behavior.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Sometimes we need to choose the rightmost option among multiple
different mount options. For example, we want to find the rightmost
of "proto," "tcp," and "udp". Or, the rightmost of "vers," "nfsvers,"
"v2," and "v3".
Update po_rightmost() to choose among N options instead of just two.
Signed-off-by: Steve Dickson <steved@redhat.com>
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Introduce a function that is especially for parsing keyword mount options
that take a numeric value.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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utils/mount to prevent them from being included multiple times.
For headers that already have this, use a more unique macro name to reduce the
probability that some other header may use the same macro.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Neil observed that po_rightmost() now returns enum values from both
enum {
PO_NOT_FOUND = 0,
PO_FOUND = 1,
}
and
enum {
PO_KEY2_RIGHTMOST = 1,
PO_KEY1_RIGHTMOST = -1,
}
It would be cleaner to use a single enum for po_rightmost()'s return value.
We take the next logical step and create specific types for the return
values in order to ensure we don't mix the enum values, and to document
explicitly what return values callers can expect.
This could have been a simpler patch, but I think the end result is a
cleaner overall parser API.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Neil Brown <neilb@suse.de>
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I forgot to add symbolic return codes for po_rightmost(). Add return codes
for PO_KEY1_RIGHTMOST and PO_KEY2_RIGHTMOST.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Neil Brown <neilb@suse.de>
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Adapt a parsing trick used by Python.
Parse mount option strings into an abstract data type so we don't have to
copy and/or tokenize the whole option string multiple times while trying
to manipulate the mount options. Then, just before calling the mount(2)
system call, convert the object back into a C string.
One major advantage of this approach is that we can copy the final version
of the mount options into /etc/mtab when we're done, instead of copying in
the original mount options that the user specified. Any fallback from NFS
v3 to NFS v2 or TCP to UDP that was done by mount.nfs will be reflected in
/etc/mtab.
This patch adds methods for creating and manipulating mount option data
objects.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Neil Brown <neilb@suse.de>
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