| Message ID | 20210820135707.171001-2-jlayton@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | fs: remove support for mandatory locking | expand |
From: Jeff Layton > Sent: 20 August 2021 14:57 > > We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros > have disabled it. Warn the stragglers that still use "-o mand" that > we'll be dropping support for that mount option. > > Cc: stable@vger.kernel.org > Signed-off-by: Jeff Layton <jlayton@kernel.org> > --- > fs/namespace.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/fs/namespace.c b/fs/namespace.c > index ab4174a3c802..ffab0bb1e649 100644 > --- a/fs/namespace.c > +++ b/fs/namespace.c > @@ -1716,8 +1716,16 @@ static inline bool may_mount(void) > } > > #ifdef CONFIG_MANDATORY_FILE_LOCKING > +static bool warned_mand; > static inline bool may_mandlock(void) > { > + if (!warned_mand) { > + warned_mand = true; > + pr_warn("======================================================\n"); > + pr_warn("WARNING: the mand mount option is being deprecated and\n"); > + pr_warn(" will be removed in v5.15!\n"); > + pr_warn("======================================================\n"); > + } > return capable(CAP_SYS_ADMIN); > } If that is called more than once you don't want the 'inline'. I doubt it matters is not inlined - hardly a hot path. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
On Fri, 2021-08-20 at 15:49 +0000, David Laight wrote: > From: Jeff Layton > > Sent: 20 August 2021 14:57 > > > > We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros > > have disabled it. Warn the stragglers that still use "-o mand" that > > we'll be dropping support for that mount option. > > > > Cc: stable@vger.kernel.org > > Signed-off-by: Jeff Layton <jlayton@kernel.org> > > --- > > fs/namespace.c | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/fs/namespace.c b/fs/namespace.c > > index ab4174a3c802..ffab0bb1e649 100644 > > --- a/fs/namespace.c > > +++ b/fs/namespace.c > > @@ -1716,8 +1716,16 @@ static inline bool may_mount(void) > > } > > > > #ifdef CONFIG_MANDATORY_FILE_LOCKING > > +static bool warned_mand; > > static inline bool may_mandlock(void) > > { > > + if (!warned_mand) { > > + warned_mand = true; > > + pr_warn("======================================================\n"); > > + pr_warn("WARNING: the mand mount option is being deprecated and\n"); > > + pr_warn(" will be removed in v5.15!\n"); > > + pr_warn("======================================================\n"); > > + } > > return capable(CAP_SYS_ADMIN); > > } > > If that is called more than once you don't want the 'inline'. > I doubt it matters is not inlined - hardly a hot path. > > David > > - > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK > Registration No: 1397386 (Wales) > ACK. Of course. That really needs to not be inline. I'll fix that up in my tree. Thanks!
On 20.08.21 15:57, Jeff Layton wrote: > We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros > have disabled it. Warn the stragglers that still use "-o mand" that > we'll be dropping support for that mount option. > > Cc: stable@vger.kernel.org > Signed-off-by: Jeff Layton <jlayton@kernel.org> > --- > fs/namespace.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/fs/namespace.c b/fs/namespace.c > index ab4174a3c802..ffab0bb1e649 100644 > --- a/fs/namespace.c > +++ b/fs/namespace.c > @@ -1716,8 +1716,16 @@ static inline bool may_mount(void) > } > > #ifdef CONFIG_MANDATORY_FILE_LOCKING > +static bool warned_mand; > static inline bool may_mandlock(void) > { > + if (!warned_mand) { > + warned_mand = true; > + pr_warn("======================================================\n"); > + pr_warn("WARNING: the mand mount option is being deprecated and\n"); > + pr_warn(" will be removed in v5.15!\n"); > + pr_warn("======================================================\n"); > + } Is there a reason not to use pr_warn_once() ?
On Fri, 2021-08-20 at 17:52 +0200, David Hildenbrand wrote: > On 20.08.21 15:57, Jeff Layton wrote: > > We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros > > have disabled it. Warn the stragglers that still use "-o mand" that > > we'll be dropping support for that mount option. > > > > Cc: stable@vger.kernel.org > > Signed-off-by: Jeff Layton <jlayton@kernel.org> > > --- > > fs/namespace.c | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/fs/namespace.c b/fs/namespace.c > > index ab4174a3c802..ffab0bb1e649 100644 > > --- a/fs/namespace.c > > +++ b/fs/namespace.c > > @@ -1716,8 +1716,16 @@ static inline bool may_mount(void) > > } > > > > #ifdef CONFIG_MANDATORY_FILE_LOCKING > > +static bool warned_mand; > > static inline bool may_mandlock(void) > > { > > + if (!warned_mand) { > > + warned_mand = true; > > + pr_warn("======================================================\n"); > > + pr_warn("WARNING: the mand mount option is being deprecated and\n"); > > + pr_warn(" will be removed in v5.15!\n"); > > + pr_warn("======================================================\n"); > > + } > > Is there a reason not to use pr_warn_once() ? > > No reason at all. I'll send out a v3 set in a bit with that change. Thanks!
On Fri, 20 Aug 2021 17:52:19 +0200 David Hildenbrand <david@redhat.com> wrote: > > +static bool warned_mand; > > static inline bool may_mandlock(void) > > { > > + if (!warned_mand) { > > + warned_mand = true; > > + pr_warn("======================================================\n"); > > + pr_warn("WARNING: the mand mount option is being deprecated and\n"); > > + pr_warn(" will be removed in v5.15!\n"); > > + pr_warn("======================================================\n"); > > + } > > Is there a reason not to use pr_warn_once() ? You would need a single call though, otherwise each pr_warn_once() would have its own state that it warned once. const char warning[] = "======================================================\n" "WARNING: the mand mount option is being deprecated and\n" " will be removed in v5.15!\n" "======================================================\n"; pr_warn_once(warning); -- Steve
diff --git a/fs/namespace.c b/fs/namespace.c index ab4174a3c802..ffab0bb1e649 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1716,8 +1716,16 @@ static inline bool may_mount(void) } #ifdef CONFIG_MANDATORY_FILE_LOCKING +static bool warned_mand; static inline bool may_mandlock(void) { + if (!warned_mand) { + warned_mand = true; + pr_warn("======================================================\n"); + pr_warn("WARNING: the mand mount option is being deprecated and\n"); + pr_warn(" will be removed in v5.15!\n"); + pr_warn("======================================================\n"); + } return capable(CAP_SYS_ADMIN); } #else
We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros have disabled it. Warn the stragglers that still use "-o mand" that we'll be dropping support for that mount option. Cc: stable@vger.kernel.org Signed-off-by: Jeff Layton <jlayton@kernel.org> --- fs/namespace.c | 8 ++++++++ 1 file changed, 8 insertions(+)