| Message ID | 163456865277.2614702.2064731306330022896.stgit@warthog.procyon.org.uk |
|---|---|
| State | New |
| Headers | show |
| Series | fscache: Rewrite index API and management system | expand |
On Mon, 2021-10-18 at 15:50 +0100, David Howells wrote: > Provide an S_KERNEL_FILE inode flag that a kernel service, e.g. cachefiles, > can set to ward off other kernel services and drivers (including itself) > from using files it is actively using. > > Signed-off-by: David Howells <dhowells@redhat.com> > --- > > include/linux/fs.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/linux/fs.h b/include/linux/fs.h > index e7a633353fd2..197493507744 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -2250,6 +2250,7 @@ struct super_operations { > #define S_ENCRYPTED (1 << 14) /* Encrypted file (using fs/crypto/) */ > #define S_CASEFOLD (1 << 15) /* Casefolded file */ > #define S_VERITY (1 << 16) /* Verity file (using fs/verity/) */ > +#define S_KERNEL_FILE (1 << 17) /* File is in use by the kernel (eg. fs/cachefiles) */ > > /* > * Note that nosuid etc flags are inode-specific: setting some file-system > > It'd be better to fold this in with the patch where the first user is added. That would make it easier to see how you intend to use it.
Jeff Layton <jlayton@redhat.com> wrote: > It'd be better to fold this in with the patch where the first user is > added. That would make it easier to see how you intend to use it. Yeah - I didn't put it in there because as I zip backwards and forwards through the patch stack, applying/deapplying this change triggers a complete rebuild. David
diff --git a/include/linux/fs.h b/include/linux/fs.h index e7a633353fd2..197493507744 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2250,6 +2250,7 @@ struct super_operations { #define S_ENCRYPTED (1 << 14) /* Encrypted file (using fs/crypto/) */ #define S_CASEFOLD (1 << 15) /* Casefolded file */ #define S_VERITY (1 << 16) /* Verity file (using fs/verity/) */ +#define S_KERNEL_FILE (1 << 17) /* File is in use by the kernel (eg. fs/cachefiles) */ /* * Note that nosuid etc flags are inode-specific: setting some file-system
Provide an S_KERNEL_FILE inode flag that a kernel service, e.g. cachefiles, can set to ward off other kernel services and drivers (including itself) from using files it is actively using. Signed-off-by: David Howells <dhowells@redhat.com> --- include/linux/fs.h | 1 + 1 file changed, 1 insertion(+)