diff mbox series

[REPOST,v3,07/16] xfs: mount-api - move xfs_parseargs() validation to a helper

Message ID 156933135854.20933.15258576633425282851.stgit@fedora-28 (mailing list archive)
State Superseded
Headers show
Series xfs: mount API patch series | expand

Commit Message

Ian Kent Sept. 24, 2019, 1:22 p.m. UTC 
Move the validation code of xfs_parseargs() into a helper for later
use within the mount context methods.

Signed-off-by: Ian Kent <raven@themaw.net>
---
 fs/xfs/xfs_super.c |  148 +++++++++++++++++++++++++++++++++-------------------
 1 file changed, 94 insertions(+), 54 deletions(-)

Comments

Brian Foster Sept. 24, 2019, 2:37 p.m. UTC | #1 
On Tue, Sep 24, 2019 at 09:22:38PM +0800, Ian Kent wrote:
> Move the validation code of xfs_parseargs() into a helper for later
> use within the mount context methods.
> 
> Signed-off-by: Ian Kent <raven@themaw.net>
> ---
>  fs/xfs/xfs_super.c |  148 +++++++++++++++++++++++++++++++++-------------------
>  1 file changed, 94 insertions(+), 54 deletions(-)
> 
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index 6792d46fa0be..cfda58dd3822 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -356,6 +356,97 @@ xfs_parse_param(
>  	return 0;
>  }
>  
> +STATIC int
> +xfs_validate_params(
> +	struct xfs_mount        *mp,
> +	struct xfs_fs_context   *ctx,
> +	bool			nooptions)
> +{
> +	if (nooptions)
> +		goto noopts;
> +
> +	/*
> +	 * no recovery flag requires a read-only mount
> +	 */
> +	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
> +	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
> +		xfs_warn(mp, "no-recovery mounts must be read-only.");
> +		return -EINVAL;
> +	}
> +
> +	if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (ctx->dsunit || ctx->dswidth)) {

Long line ^.

> +		xfs_warn(mp,
> +	"sunit and swidth options incompatible with the noalign option");
> +		return -EINVAL;
> +	}
> +
...
> @@ -447,16 +538,7 @@ xfs_parseargs(
>  		ret = xfs_parse_param(&fc, &param);
>  		kfree(param.string);
>  		if (ret < 0)
> -			return ret;
> -	}
> -
> -	/*
> -	 * no recovery flag requires a read-only mount
> -	 */
> -	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
> -	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
> -		xfs_warn(mp, "no-recovery mounts must be read-only.");
> -		return -EINVAL;
> +			goto done;

Isn't this supposed to just return the error?

Brian

>  	}
>  
>  	if ((mp->m_flags & XFS_MOUNT_NOALIGN) &&
> @@ -486,51 +568,9 @@ xfs_parseargs(
>  	}
>  
>  done:
> -	if (ctx->dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
> -		/*
> -		 * At this point the superblock has not been read
> -		 * in, therefore we do not know the block size.
> -		 * Before the mount call ends we will convert
> -		 * these to FSBs.
> -		 */
> -		mp->m_dalign = ctx->dsunit;
> -		mp->m_swidth = ctx->dswidth;
> -	}
> -
> -	if (mp->m_logbufs != -1 &&
> -	    mp->m_logbufs != 0 &&
> -	    (mp->m_logbufs < XLOG_MIN_ICLOGS ||
> -	     mp->m_logbufs > XLOG_MAX_ICLOGS)) {
> -		xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
> -			mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
> -		return -EINVAL;
> -	}
> -	if (mp->m_logbsize != -1 &&
> -	    mp->m_logbsize !=  0 &&
> -	    (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
> -	     mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
> -	     !is_power_of_2(mp->m_logbsize))) {
> -		xfs_warn(mp,
> -			"invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
> -			mp->m_logbsize);
> -		return -EINVAL;
> -	}
> +	ret = xfs_validate_params(mp, &context, false);
>  
> -	if (ctx->iosizelog) {
> -		if (ctx->iosizelog > XFS_MAX_IO_LOG ||
> -		    ctx->iosizelog < XFS_MIN_IO_LOG) {
> -			xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
> -				ctx->iosizelog, XFS_MIN_IO_LOG,
> -				XFS_MAX_IO_LOG);
> -			return -EINVAL;
> -		}
> -
> -		mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
> -		mp->m_readio_log = ctx->iosizelog;
> -		mp->m_writeio_log = ctx->iosizelog;
> -	}
> -
> -	return 0;
> +	return ret;
>  }
>  
>  struct proc_xfs_info {
>
Ian Kent Sept. 25, 2019, 12:32 a.m. UTC | #2 
On Tue, 2019-09-24 at 10:37 -0400, Brian Foster wrote:
> On Tue, Sep 24, 2019 at 09:22:38PM +0800, Ian Kent wrote:
> > Move the validation code of xfs_parseargs() into a helper for later
> > use within the mount context methods.
> > 
> > Signed-off-by: Ian Kent <raven@themaw.net>
> > ---
> >  fs/xfs/xfs_super.c |  148 +++++++++++++++++++++++++++++++++-------
> > ------------
> >  1 file changed, 94 insertions(+), 54 deletions(-)
> > 
> > diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> > index 6792d46fa0be..cfda58dd3822 100644
> > --- a/fs/xfs/xfs_super.c
> > +++ b/fs/xfs/xfs_super.c
> > @@ -356,6 +356,97 @@ xfs_parse_param(
> >  	return 0;
> >  }
> >  
> > +STATIC int
> > +xfs_validate_params(
> > +	struct xfs_mount        *mp,
> > +	struct xfs_fs_context   *ctx,
> > +	bool			nooptions)
> > +{
> > +	if (nooptions)
> > +		goto noopts;
> > +
> > +	/*
> > +	 * no recovery flag requires a read-only mount
> > +	 */
> > +	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
> > +	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
> > +		xfs_warn(mp, "no-recovery mounts must be read-only.");
> > +		return -EINVAL;
> > +	}
> > +
> > +	if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (ctx->dsunit || ctx-
> > >dswidth)) {
> 
> Long line ^.

Oh, I thought I fixed those long lines.
I'll sort that out.

> 
> > +		xfs_warn(mp,
> > +	"sunit and swidth options incompatible with the noalign
> > option");
> > +		return -EINVAL;
> > +	}
> > +
> ...
> > @@ -447,16 +538,7 @@ xfs_parseargs(
> >  		ret = xfs_parse_param(&fc, &param);
> >  		kfree(param.string);
> >  		if (ret < 0)
> > -			return ret;
> > -	}
> > -
> > -	/*
> > -	 * no recovery flag requires a read-only mount
> > -	 */
> > -	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
> > -	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
> > -		xfs_warn(mp, "no-recovery mounts must be read-only.");
> > -		return -EINVAL;
> > +			goto done;
> 
> Isn't this supposed to just return the error?

Yes, I think your right ... I'll fix that too.

Ian
> 
> Brian
> 
> >  	}
> >  
> >  	if ((mp->m_flags & XFS_MOUNT_NOALIGN) &&
> > @@ -486,51 +568,9 @@ xfs_parseargs(
> >  	}
> >  
> >  done:
> > -	if (ctx->dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
> > -		/*
> > -		 * At this point the superblock has not been read
> > -		 * in, therefore we do not know the block size.
> > -		 * Before the mount call ends we will convert
> > -		 * these to FSBs.
> > -		 */
> > -		mp->m_dalign = ctx->dsunit;
> > -		mp->m_swidth = ctx->dswidth;
> > -	}
> > -
> > -	if (mp->m_logbufs != -1 &&
> > -	    mp->m_logbufs != 0 &&
> > -	    (mp->m_logbufs < XLOG_MIN_ICLOGS ||
> > -	     mp->m_logbufs > XLOG_MAX_ICLOGS)) {
> > -		xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
> > -			mp->m_logbufs, XLOG_MIN_ICLOGS,
> > XLOG_MAX_ICLOGS);
> > -		return -EINVAL;
> > -	}
> > -	if (mp->m_logbsize != -1 &&
> > -	    mp->m_logbsize !=  0 &&
> > -	    (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
> > -	     mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
> > -	     !is_power_of_2(mp->m_logbsize))) {
> > -		xfs_warn(mp,
> > -			"invalid logbufsize: %d [not 16k,32k,64k,128k
> > or 256k]",
> > -			mp->m_logbsize);
> > -		return -EINVAL;
> > -	}
> > +	ret = xfs_validate_params(mp, &context, false);
> >  
> > -	if (ctx->iosizelog) {
> > -		if (ctx->iosizelog > XFS_MAX_IO_LOG ||
> > -		    ctx->iosizelog < XFS_MIN_IO_LOG) {
> > -			xfs_warn(mp, "invalid log iosize: %d [not %d-
> > %d]",
> > -				ctx->iosizelog, XFS_MIN_IO_LOG,
> > -				XFS_MAX_IO_LOG);
> > -			return -EINVAL;
> > -		}
> > -
> > -		mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
> > -		mp->m_readio_log = ctx->iosizelog;
> > -		mp->m_writeio_log = ctx->iosizelog;
> > -	}
> > -
> > -	return 0;
> > +	return ret;
> >  }
> >  
> >  struct proc_xfs_info {
> >
diff mbox series

Patch

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 6792d46fa0be..cfda58dd3822 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -356,6 +356,97 @@  xfs_parse_param(
 	return 0;
 }
 
+STATIC int
+xfs_validate_params(
+	struct xfs_mount        *mp,
+	struct xfs_fs_context   *ctx,
+	bool			nooptions)
+{
+	if (nooptions)
+		goto noopts;
+
+	/*
+	 * no recovery flag requires a read-only mount
+	 */
+	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
+	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
+		xfs_warn(mp, "no-recovery mounts must be read-only.");
+		return -EINVAL;
+	}
+
+	if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (ctx->dsunit || ctx->dswidth)) {
+		xfs_warn(mp,
+	"sunit and swidth options incompatible with the noalign option");
+		return -EINVAL;
+	}
+
+#ifndef CONFIG_XFS_QUOTA
+	if (XFS_IS_QUOTA_RUNNING(mp)) {
+		xfs_warn(mp, "quota support not available in this kernel.");
+		return -EINVAL;
+	}
+#endif
+
+	if ((ctx->dsunit && !ctx->dswidth) || (!ctx->dsunit && ctx->dswidth)) {
+		xfs_warn(mp, "sunit and swidth must be specified together");
+		return -EINVAL;
+	}
+
+	if (ctx->dsunit && (ctx->dswidth % ctx->dsunit != 0)) {
+		xfs_warn(mp,
+	"stripe width (%d) must be a multiple of the stripe unit (%d)",
+			ctx->dswidth, ctx->dsunit);
+		return -EINVAL;
+	}
+
+noopts:
+	if (ctx->dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
+		/*
+		 * At this point the superblock has not been read
+		 * in, therefore we do not know the block size.
+		 * Before the mount call ends we will convert
+		 * these to FSBs.
+		 */
+		mp->m_dalign = ctx->dsunit;
+		mp->m_swidth = ctx->dswidth;
+	}
+
+	if (mp->m_logbufs != -1 &&
+	    mp->m_logbufs != 0 &&
+	    (mp->m_logbufs < XLOG_MIN_ICLOGS ||
+	     mp->m_logbufs > XLOG_MAX_ICLOGS)) {
+		xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
+			mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
+		return -EINVAL;
+	}
+	if (mp->m_logbsize != -1 &&
+	    mp->m_logbsize !=  0 &&
+	    (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
+	     mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
+	     !is_power_of_2(mp->m_logbsize))) {
+		xfs_warn(mp,
+			"invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
+			mp->m_logbsize);
+		return -EINVAL;
+	}
+
+	if (ctx->iosizelog) {
+		if (ctx->iosizelog > XFS_MAX_IO_LOG ||
+		    ctx->iosizelog < XFS_MIN_IO_LOG) {
+			xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
+				ctx->iosizelog, XFS_MIN_IO_LOG,
+				XFS_MAX_IO_LOG);
+			return -EINVAL;
+		}
+
+		mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
+		mp->m_readio_log = ctx->iosizelog;
+		mp->m_writeio_log = ctx->iosizelog;
+	}
+
+	return 0;
+}
+
 /*
  * This function fills in xfs_mount_t fields based on mount args.
  * Note: the superblock has _not_ yet been read in.
@@ -447,16 +538,7 @@  xfs_parseargs(
 		ret = xfs_parse_param(&fc, &param);
 		kfree(param.string);
 		if (ret < 0)
-			return ret;
-	}
-
-	/*
-	 * no recovery flag requires a read-only mount
-	 */
-	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
-	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
-		xfs_warn(mp, "no-recovery mounts must be read-only.");
-		return -EINVAL;
+			goto done;
 	}
 
 	if ((mp->m_flags & XFS_MOUNT_NOALIGN) &&
@@ -486,51 +568,9 @@  xfs_parseargs(
 	}
 
 done:
-	if (ctx->dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) {
-		/*
-		 * At this point the superblock has not been read
-		 * in, therefore we do not know the block size.
-		 * Before the mount call ends we will convert
-		 * these to FSBs.
-		 */
-		mp->m_dalign = ctx->dsunit;
-		mp->m_swidth = ctx->dswidth;
-	}
-
-	if (mp->m_logbufs != -1 &&
-	    mp->m_logbufs != 0 &&
-	    (mp->m_logbufs < XLOG_MIN_ICLOGS ||
-	     mp->m_logbufs > XLOG_MAX_ICLOGS)) {
-		xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
-			mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
-		return -EINVAL;
-	}
-	if (mp->m_logbsize != -1 &&
-	    mp->m_logbsize !=  0 &&
-	    (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
-	     mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
-	     !is_power_of_2(mp->m_logbsize))) {
-		xfs_warn(mp,
-			"invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
-			mp->m_logbsize);
-		return -EINVAL;
-	}
+	ret = xfs_validate_params(mp, &context, false);
 
-	if (ctx->iosizelog) {
-		if (ctx->iosizelog > XFS_MAX_IO_LOG ||
-		    ctx->iosizelog < XFS_MIN_IO_LOG) {
-			xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
-				ctx->iosizelog, XFS_MIN_IO_LOG,
-				XFS_MAX_IO_LOG);
-			return -EINVAL;
-		}
-
-		mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
-		mp->m_readio_log = ctx->iosizelog;
-		mp->m_writeio_log = ctx->iosizelog;
-	}
-
-	return 0;
+	return ret;
 }
 
 struct proc_xfs_info {