From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-xfs@vger.kernel.org,
Allison Collins <allison.henderson@oracle.com>
Subject: Re: [PATCH 13/29] xfs: remove ATTR_KERNOVAL
Date: Tue, 21 Jan 2020 10:15:38 -0800 [thread overview]
Message-ID: <20200121181538.GM8247@magnolia> (raw)
In-Reply-To: <20200114081051.297488-14-hch@lst.de>
On Tue, Jan 14, 2020 at 09:10:35AM +0100, Christoph Hellwig wrote:
> We can just pass down the Linux convention of a zero valuelen to just
> query for the existance of an attribute to the low-level code instead.
> The use in the legacy xfs_attr_list code only used by the ioctl
> interface was already dead code, as the callers check that the flag
> is not present.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
--D
> ---
> fs/xfs/libxfs/xfs_attr.c | 8 ++++----
> fs/xfs/libxfs/xfs_attr.h | 4 +---
> fs/xfs/libxfs/xfs_attr_leaf.c | 14 +++++++-------
> fs/xfs/libxfs/xfs_attr_remote.c | 2 +-
> fs/xfs/xfs_attr_list.c | 3 ---
> fs/xfs/xfs_xattr.c | 4 ----
> 6 files changed, 13 insertions(+), 22 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 09954c0e8456..1c4e8ac38d5a 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -94,9 +94,9 @@ xfs_attr_get_ilocked(
> /*
> * Retrieve an extended attribute by name, and its value if requested.
> *
> - * If ATTR_KERNOVAL is set in args->flags, then the caller does not want the
> - * value, just an indication whether the attribute exists and the size of the
> - * value if it exists. The size is returned in args.valuelen.
> + * If args->valuelen is zero, then the caller does not want the value, just an
> + * indication whether the attribute exists and the size of the value if it
> + * exists. The size is returned in args.valuelen.
> *
> * If the attribute is found, but exceeds the size limit set by the caller in
> * args->valuelen, return -ERANGE with the size of the attribute that was found
> @@ -115,7 +115,7 @@ xfs_attr_get(
> uint lock_mode;
> int error;
>
> - ASSERT((args->flags & (ATTR_ALLOC | ATTR_KERNOVAL)) || args->value);
> + ASSERT((args->flags & ATTR_ALLOC) || !args->valuelen || args->value);
>
> XFS_STATS_INC(args->dp->i_mount, xs_attr_get);
>
> diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
> index b8c4ed27f626..fe064cd81747 100644
> --- a/fs/xfs/libxfs/xfs_attr.h
> +++ b/fs/xfs/libxfs/xfs_attr.h
> @@ -34,12 +34,11 @@ struct xfs_attr_list_context;
> #define ATTR_REPLACE 0x0020 /* pure set: fail if attr does not exist */
>
> #define ATTR_KERNOTIME 0x1000 /* [kernel] don't update inode timestamps */
> -#define ATTR_KERNOVAL 0x2000 /* [kernel] get attr size only, not value */
>
> #define ATTR_ALLOC 0x8000 /* [kernel] allocate xattr buffer on demand */
>
> #define ATTR_KERNEL_FLAGS \
> - (ATTR_KERNOTIME | ATTR_KERNOVAL | ATTR_ALLOC)
> + (ATTR_KERNOTIME | ATTR_ALLOC)
>
> #define XFS_ATTR_FLAGS \
> { ATTR_DONTFOLLOW, "DONTFOLLOW" }, \
> @@ -49,7 +48,6 @@ struct xfs_attr_list_context;
> { ATTR_CREATE, "CREATE" }, \
> { ATTR_REPLACE, "REPLACE" }, \
> { ATTR_KERNOTIME, "KERNOTIME" }, \
> - { ATTR_KERNOVAL, "KERNOVAL" }, \
> { ATTR_ALLOC, "ALLOC" }
>
> /*
> diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
> index fed537a4353d..5e700dfc48a9 100644
> --- a/fs/xfs/libxfs/xfs_attr_leaf.c
> +++ b/fs/xfs/libxfs/xfs_attr_leaf.c
> @@ -464,7 +464,7 @@ xfs_attr_copy_value(
> /*
> * No copy if all we have to do is get the length
> */
> - if (args->flags & ATTR_KERNOVAL) {
> + if (!args->valuelen) {
> args->valuelen = valuelen;
> return 0;
> }
> @@ -830,9 +830,9 @@ xfs_attr_shortform_lookup(xfs_da_args_t *args)
> /*
> * Retrieve the attribute value and length.
> *
> - * If ATTR_KERNOVAL is specified, only the length needs to be returned.
> - * Unlike a lookup, we only return an error if the attribute does not
> - * exist or we can't retrieve the value.
> + * If args->valuelen is zero, only the length needs to be returned. Unlike a
> + * lookup, we only return an error if the attribute does not exist or we can't
> + * retrieve the value.
> */
> int
> xfs_attr_shortform_getvalue(
> @@ -2444,9 +2444,9 @@ xfs_attr3_leaf_lookup_int(
> * Get the value associated with an attribute name from a leaf attribute
> * list structure.
> *
> - * If ATTR_KERNOVAL is specified, only the length needs to be returned.
> - * Unlike a lookup, we only return an error if the attribute does not
> - * exist or we can't retrieve the value.
> + * If args->valuelen is zero, only the length needs to be returned. Unlike a
> + * lookup, we only return an error if the attribute does not exist or we can't
> + * retrieve the value.
> */
> int
> xfs_attr3_leaf_getvalue(
> diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
> index a6ef5df42669..56d8ba785c53 100644
> --- a/fs/xfs/libxfs/xfs_attr_remote.c
> +++ b/fs/xfs/libxfs/xfs_attr_remote.c
> @@ -380,7 +380,7 @@ xfs_attr_rmtval_get(
>
> trace_xfs_attr_rmtval_get(args);
>
> - ASSERT(!(args->flags & ATTR_KERNOVAL));
> + ASSERT(args->valuelen != 0);
> ASSERT(args->rmtvaluelen == args->valuelen);
>
> valuelen = args->rmtvaluelen;
> diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
> index 5139ef983cd6..ac8dc64447d6 100644
> --- a/fs/xfs/xfs_attr_list.c
> +++ b/fs/xfs/xfs_attr_list.c
> @@ -568,7 +568,6 @@ xfs_attr_put_listent(
> int arraytop;
>
> ASSERT(!context->seen_enough);
> - ASSERT(!(context->flags & ATTR_KERNOVAL));
> ASSERT(context->count >= 0);
> ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
> ASSERT(context->firstu >= sizeof(*alist));
> @@ -637,8 +636,6 @@ xfs_attr_list(
> */
> if (((long)buffer) & (sizeof(int)-1))
> return -EFAULT;
> - if (flags & ATTR_KERNOVAL)
> - bufsize = 0;
>
> /*
> * Initialize the output buffer.
> diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
> index b3ce5e8777f9..c9c44f8aebed 100644
> --- a/fs/xfs/xfs_xattr.c
> +++ b/fs/xfs/xfs_xattr.c
> @@ -31,10 +31,6 @@ xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
> };
> int error;
>
> - /* Convert Linux syscall to XFS internal ATTR flags */
> - if (!size)
> - args.flags |= ATTR_KERNOVAL;
> -
> error = xfs_attr_get(&args);
> if (error)
> return error;
> --
> 2.24.1
>
next prev parent reply other threads:[~2020-01-21 18:15 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-14 8:10 clean up the attr interface v2 Christoph Hellwig
2020-01-14 8:10 ` [PATCH 01/29] xfs: remove the ATTR_INCOMPLETE flag Christoph Hellwig
2020-01-17 0:59 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 02/29] xfs: merge xfs_attr_remove into xfs_attr_set Christoph Hellwig
2020-01-21 17:28 ` Darrick J. Wong
2020-01-25 4:17 ` Allison Collins
2020-01-25 23:22 ` Christoph Hellwig
2020-01-26 22:23 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 03/29] xfs: merge xfs_attrmulti_attr_remove into xfs_attrmulti_attr_set Christoph Hellwig
2020-01-21 17:41 ` Darrick J. Wong
2020-01-23 22:33 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 04/29] xfs: use strndup_user in XFS_IOC_ATTRMULTI_BY_HANDLE Christoph Hellwig
2020-01-21 17:45 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 05/29] xfs: factor out a helper for a single XFS_IOC_ATTRMULTI_BY_HANDLE op Christoph Hellwig
2020-01-21 17:54 ` Darrick J. Wong
2020-01-23 22:34 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 06/29] xfs: remove the name == NULL check from xfs_attr_args_init Christoph Hellwig
2020-01-21 17:57 ` Darrick J. Wong
2020-01-23 22:35 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 07/29] xfs: remove the MAXNAMELEN " Christoph Hellwig
2020-01-21 18:03 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 08/29] xfs: move struct xfs_da_args to xfs_types.h Christoph Hellwig
2020-01-21 18:48 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 09/29] xfs: turn xfs_da_args.value into a void pointer Christoph Hellwig
2020-01-21 18:07 ` Darrick J. Wong
2020-01-23 22:36 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 10/29] xfs: pass an initialized xfs_da_args structure to xfs_attr_set Christoph Hellwig
2020-01-21 18:10 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 11/29] xfs: pass an initialized xfs_da_args to xfs_attr_get Christoph Hellwig
2020-01-21 18:12 ` Darrick J. Wong
2020-01-23 22:39 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 12/29] xfs: remove the xfs_inode argument to xfs_attr_get_ilocked Christoph Hellwig
2020-01-21 18:13 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 13/29] xfs: remove ATTR_KERNOVAL Christoph Hellwig
2020-01-21 18:15 ` Darrick J. Wong [this message]
2020-01-14 8:10 ` [PATCH 14/29] xfs: remove ATTR_ALLOC and XFS_DA_OP_ALLOCVAL Christoph Hellwig
2020-01-21 18:17 ` Darrick J. Wong
2020-01-23 22:40 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 15/29] xfs: replace ATTR_KERNOTIME with XFS_DA_OP_NOTIME Christoph Hellwig
2020-01-21 18:20 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 16/29] xfs: factor out a xfs_attr_match helper Christoph Hellwig
2020-01-21 18:27 ` Darrick J. Wong
2020-01-23 22:41 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 17/29] xfs: cleanup xfs_attr_list_context Christoph Hellwig
2020-01-21 18:30 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 18/29] xfs: remove the unused ATTR_ENTRY macro Christoph Hellwig
2020-01-21 18:33 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 19/29] xfs: replace ATTR_ENTBASESIZE with offsetoff Christoph Hellwig
2020-01-21 18:36 ` Darrick J. Wong
2020-01-23 22:43 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 20/29] xfs: move the legacy xfs_attr_list to xfs_ioctl.c Christoph Hellwig
2020-01-21 18:41 ` Darrick J. Wong
2020-01-24 23:13 ` Christoph Hellwig
2020-01-14 8:10 ` [PATCH 21/29] xfs: rename xfs_attr_list_int to xfs_attr_list Christoph Hellwig
2020-01-21 18:42 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 22/29] xfs: lift common checks into xfs_ioc_attr_list Christoph Hellwig
2020-01-21 18:43 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 23/29] xfs: lift buffer allocation " Christoph Hellwig
2020-01-21 18:49 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 24/29] xfs: lift cursor copy in/out " Christoph Hellwig
2020-01-21 18:52 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 25/29] xfs: improve xfs_forget_acl Christoph Hellwig
2020-01-21 18:56 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 26/29] xfs: clean up the ATTR_REPLACE checks Christoph Hellwig
2020-01-21 18:57 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 27/29] xfs: clean up the attr flag confusion Christoph Hellwig
2020-01-21 19:44 ` Darrick J. Wong
2020-01-24 23:24 ` Christoph Hellwig
2020-01-25 23:10 ` Christoph Hellwig
2020-01-26 22:24 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 28/29] xfs: remove XFS_DA_OP_INCOMPLETE Christoph Hellwig
2020-01-21 19:45 ` Darrick J. Wong
2020-01-14 8:10 ` [PATCH 29/29] xfs: embedded the attrlist cursor into struct xfs_attr_list_context Christoph Hellwig
2020-01-21 19:04 ` Darrick J. Wong
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