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The configfs operations ->make_item() and ->make_group() currently
return a new item/group. A return of NULL signifies an error. Because
of this, -ENOMEM is the only return code bubbled up the stack.
Multiple folks have requested the ability to return specific error codes
when these operations fail. This patch adds that ability by changing the
->make_item/group() ops to return ERR_PTR() values. These errors are
bubbled up appropriately. NULL returns are changed to -ENOMEM for
compatibility.
Also updated are the in-kernel users of configfs.
This is a rework of reverted commit 11c3b79218390a139f2d474ee1e983a672d5839a.
Signed-off-by: Joel Becker <[email protected]>
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errors."
This reverts commit 11c3b79218390a139f2d474ee1e983a672d5839a. The code
will move to PTR_ERR().
Signed-off-by: Joel Becker <[email protected]>
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The configfs operations ->make_item() and ->make_group() currently
return a new item/group. A return of NULL signifies an error. Because
of this, -ENOMEM is the only return code bubbled up the stack.
Multiple folks have requested the ability to return specific error codes
when these operations fail. This patch adds that ability by changing the
->make_item/group() ops to return an int.
Also updated are the in-kernel users of configfs.
Signed-off-by: Joel Becker <[email protected]>
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Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc).
Here is a short excerpt of the semantic patch performing
this transformation:
@@
type T2;
expression x;
identifier f,fld;
expression E;
expression E1,E2;
expression e1,e2,e3,y;
statement S;
@@
x =
- kmalloc
+ kzalloc
(E1,E2)
... when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\)
- memset((T2)x,0,E1);
@@
expression E1,E2,E3;
@@
- kzalloc(E1 * E2,E3)
+ kcalloc(E1,E2,E3)
[[email protected]: get kcalloc args the right way around]
Signed-off-by: Yoann Padioleau <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Acked-by: Russell King <[email protected]>
Cc: Bryan Wu <[email protected]>
Acked-by: Jiri Slaby <[email protected]>
Cc: Dave Airlie <[email protected]>
Acked-by: Roland Dreier <[email protected]>
Cc: Jiri Kosina <[email protected]>
Acked-by: Dmitry Torokhov <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Acked-by: Mauro Carvalho Chehab <[email protected]>
Acked-by: Pierre Ossman <[email protected]>
Cc: Jeff Garzik <[email protected]>
Cc: "David S. Miller" <[email protected]>
Acked-by: Greg KH <[email protected]>
Cc: James Bottomley <[email protected]>
Cc: "Antonino A. Daplas" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Convert the su_sem member of struct configfs_subsystem to a struct
mutex, as that's what it is. Also convert all the users and update
Documentation/configfs.txt and Documentation/configfs_example.c
accordingly.
[ Conflict in fs/dlm/config.c with commit
3168b0780d06ace875696f8a648d04d6089654e5 manually resolved. --Mark ]
Inspired-by: Satyam Sharma <[email protected]>
Signed-off-by: Joel Becker <[email protected]>
Signed-off-by: Mark Fasheh <[email protected]>
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The configfs_example module was missing a ->release().
Signed-off-by: Joel Becker <[email protected]>
Signed-off-by: Mark Fasheh <[email protected]>
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configfs always made item and attribute ownership root.root and
permissions based on a umask of 022. Add ->setattr() to allow
chown(2)/chmod(2), and persist the changes for the lifetime of the
items and attributes.
Signed-off-by: Joel Becker <[email protected]>
Signed-off-by: Mark Fasheh <[email protected]>
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Configfs, a file system for userspace-driven kernel object configuration.
The OCFS2 stack makes extensive use of this for propagation of cluster
configuration information into kernel.
Signed-off-by: Joel Becker <[email protected]>
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