From: Tom Lendacky <thomas.lendacky@amd.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Dan Williams <dan.j.williams@intel.com>,
Michael Roth <michael.roth@amd.com>,
Ashish Kalra <ashish.kalra@amd.com>,
Joel Becker <jlbec@evilplan.org>, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v2 12/14] fs/configfs: Add a callback to determine attribute visibility
Date: Mon, 11 Mar 2024 14:58:49 -0500 [thread overview]
Message-ID: <b8210749-50eb-4b26-b616-38670990aba0@amd.com> (raw)
In-Reply-To: <b851e5f74398141bda2f5e6e1f0308cd13b39aa1.1709922929.git.thomas.lendacky@amd.com>
On 3/8/24 12:35, Tom Lendacky wrote:
> In order to support dynamic decisions as to whether an attribute should be
> created, add a callback that returns a bool to indicate whether the
> attribute should be display. If no callback is registered, the attribute
> is displayed by default.
>
> Cc: Joel Becker <jlbec@evilplan.org>
> Cc: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
> ---
> fs/configfs/file.c | 13 +++++
> include/linux/configfs.h | 114 +++++++++++++++++++++++++++------------
> 2 files changed, 93 insertions(+), 34 deletions(-)
>
> diff --git a/fs/configfs/file.c b/fs/configfs/file.c
> index 0ad32150611e..c758bcc11235 100644
> --- a/fs/configfs/file.c
> +++ b/fs/configfs/file.c
> @@ -451,6 +451,12 @@ int configfs_create_file(struct config_item * item, const struct configfs_attrib
> umode_t mode = (attr->ca_mode & S_IALLUGO) | S_IFREG;
I missed making this adjustment on the returned mode parameter below. So
this patch will change slightly to just initialize mode to attr->ca_mode
and then after the if statement, apply the masks as done above.
Thanks,
Tom
> int error = 0;
>
> + if (attr->ca_is_visible) {
> + mode = attr->ca_is_visible(item, attr);
> + if (!mode)
> + return 0;
> + }
> +
> inode_lock_nested(d_inode(dir), I_MUTEX_NORMAL);
> error = configfs_make_dirent(parent_sd, NULL, (void *) attr, mode,
> CONFIGFS_ITEM_ATTR, parent_sd->s_frag);
> @@ -470,9 +476,16 @@ int configfs_create_bin_file(struct config_item *item,
> {
> struct dentry *dir = item->ci_dentry;
> struct configfs_dirent *parent_sd = dir->d_fsdata;
> + const struct configfs_attribute *attr = &bin_attr->cb_attr;
> umode_t mode = (bin_attr->cb_attr.ca_mode & S_IALLUGO) | S_IFREG;
> int error = 0;
>
> + if (attr->ca_is_visible) {
> + mode = attr->ca_is_visible(item, attr);
> + if (!mode)
> + return 0;
> + }
> +
> inode_lock_nested(dir->d_inode, I_MUTEX_NORMAL);
> error = configfs_make_dirent(parent_sd, NULL, (void *) bin_attr, mode,
> CONFIGFS_ITEM_BIN_ATTR, parent_sd->s_frag);
next prev parent reply other threads:[~2024-03-11 19:58 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-08 18:35 [PATCH v2 00/14] Provide SEV-SNP support for running under an SVSM Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 01/14] x86/sev: Rename snp_init() in the boot/compressed/sev.c file Tom Lendacky
2024-03-10 21:25 ` Borislav Petkov
2024-03-11 16:16 ` Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 02/14] x86/sev: Make the VMPL0 checking function more generic Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 03/14] x86/sev: Check for the presence of an SVSM in the SNP Secrets page Tom Lendacky
2024-03-09 0:33 ` Dionna Amalie Glaze
2024-03-11 14:50 ` Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 04/14] x86/sev: Use kernel provided SVSM Calling Areas Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 05/14] x86/sev: Perform PVALIDATE using the SVSM when not at VMPL0 Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 06/14] x86/sev: Use the SVSM to create a vCPU when not in VMPL0 Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 07/14] x86/sev: Provide SVSM discovery support Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 08/14] x86/sev: Provide guest VMPL level to userspace Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 09/14] virt: sev-guest: Choose the VMPCK key based on executing VMPL Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 10/14] configfs-tsm: Allow the privlevel_floor attribute to be updated Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 11/14] x86/sev: Extend the config-fs attestation support for an SVSM Tom Lendacky
2024-03-10 6:06 ` Kuppuswamy, Sathyanarayanan
2024-03-11 16:16 ` Tom Lendacky
2024-03-12 5:57 ` Kuppuswamy Sathyanarayanan
2024-03-12 13:29 ` Tom Lendacky
2024-03-08 18:35 ` [PATCH v2 12/14] fs/configfs: Add a callback to determine attribute visibility Tom Lendacky
2024-03-11 19:58 ` Tom Lendacky [this message]
2024-03-13 21:37 ` Joel Becker
2024-03-14 14:23 ` Tom Lendacky
2024-03-21 2:40 ` Dan Williams
2024-03-08 18:35 ` [PATCH v2 13/14] x86/sev: Hide SVSM attestation entries if not running under an SVSM Tom Lendacky
2024-03-23 17:24 ` Kuppuswamy, Sathyanarayanan
2024-03-25 14:05 ` Tom Lendacky
2024-03-26 1:10 ` Kuppuswamy Sathyanarayanan
2024-03-08 18:35 ` [PATCH v2 14/14] x86/sev: Allow non-VMPL0 execution when an SVSM is present Tom Lendacky
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