From: Chandan Rajendra <chandan@linux.ibm.com>
To: linux-xfs@vger.kernel.org
Cc: Allison Collins <allison.henderson@oracle.com>
Subject: Re: [PATCH v7 05/19] xfs: Factor out new helper functions xfs_attr_rmtval_set
Date: Tue, 25 Feb 2020 18:23:21 +0530 [thread overview]
Message-ID: <2068968.RKExeAfMjv@localhost.localdomain> (raw)
In-Reply-To: <20200223020611.1802-6-allison.henderson@oracle.com>
On Sunday, February 23, 2020 7:35 AM Allison Collins wrote:
> Break xfs_attr_rmtval_set into two helper functions xfs_attr_rmt_find_hole
> and xfs_attr_rmtval_set_value. xfs_attr_rmtval_set rolls the transaction between the
> helpers, but delayed operations cannot. We will use the helpers later when
> constructing new delayed attribute routines.
I don't see any logical errors.
Reviewed-by: Chandan Rajendra <chandanrlinux@gmail.com>
>
> Signed-off-by: Allison Collins <allison.henderson@oracle.com>
> Reviewed-by: Brian Foster <bfoster@redhat.com>
> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
> ---
> fs/xfs/libxfs/xfs_attr_remote.c | 149 +++++++++++++++++++++++++---------------
> 1 file changed, 92 insertions(+), 57 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
> index df8aca5..d1eee24 100644
> --- a/fs/xfs/libxfs/xfs_attr_remote.c
> +++ b/fs/xfs/libxfs/xfs_attr_remote.c
> @@ -440,32 +440,23 @@ xfs_attr_rmtval_get(
> }
>
> /*
> - * Write the value associated with an attribute into the out-of-line buffer
> - * that we have defined for it.
> + * Find a "hole" in the attribute address space large enough for us to drop the
> + * new attribute's value into
> */
> -int
> -xfs_attr_rmtval_set(
> +STATIC int
> +xfs_attr_rmt_find_hole(
> struct xfs_da_args *args)
> {
> struct xfs_inode *dp = args->dp;
> struct xfs_mount *mp = dp->i_mount;
> - struct xfs_bmbt_irec map;
> - xfs_dablk_t lblkno;
> - xfs_fileoff_t lfileoff = 0;
> - uint8_t *src = args->value;
> - int blkcnt;
> - int valuelen;
> - int nmap;
> int error;
> - int offset = 0;
> -
> - trace_xfs_attr_rmtval_set(args);
> + int blkcnt;
> + xfs_fileoff_t lfileoff = 0;
>
> /*
> - * Find a "hole" in the attribute address space large enough for
> - * us to drop the new attribute's value into. Because CRC enable
> - * attributes have headers, we can't just do a straight byte to FSB
> - * conversion and have to take the header space into account.
> + * Because CRC enable attributes have headers, we can't just do a
> + * straight byte to FSB conversion and have to take the header space
> + * into account.
> */
> blkcnt = xfs_attr3_rmt_blocks(mp, args->rmtvaluelen);
> error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff,
> @@ -473,48 +464,26 @@ xfs_attr_rmtval_set(
> if (error)
> return error;
>
> - args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff;
> + args->rmtblkno = (xfs_dablk_t)lfileoff;
> args->rmtblkcnt = blkcnt;
>
> - /*
> - * Roll through the "value", allocating blocks on disk as required.
> - */
> - while (blkcnt > 0) {
> - /*
> - * Allocate a single extent, up to the size of the value.
> - *
> - * Note that we have to consider this a data allocation as we
> - * write the remote attribute without logging the contents.
> - * Hence we must ensure that we aren't using blocks that are on
> - * the busy list so that we don't overwrite blocks which have
> - * recently been freed but their transactions are not yet
> - * committed to disk. If we overwrite the contents of a busy
> - * extent and then crash then the block may not contain the
> - * correct metadata after log recovery occurs.
> - */
> - nmap = 1;
> - error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno,
> - blkcnt, XFS_BMAPI_ATTRFORK, args->total, &map,
> - &nmap);
> - if (error)
> - return error;
> - error = xfs_defer_finish(&args->trans);
> - if (error)
> - return error;
> -
> - ASSERT(nmap == 1);
> - ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
> - (map.br_startblock != HOLESTARTBLOCK));
> - lblkno += map.br_blockcount;
> - blkcnt -= map.br_blockcount;
> + return 0;
> +}
>
> - /*
> - * Start the next trans in the chain.
> - */
> - error = xfs_trans_roll_inode(&args->trans, dp);
> - if (error)
> - return error;
> - }
> +STATIC int
> +xfs_attr_rmtval_set_value(
> + struct xfs_da_args *args)
> +{
> + struct xfs_inode *dp = args->dp;
> + struct xfs_mount *mp = dp->i_mount;
> + struct xfs_bmbt_irec map;
> + xfs_dablk_t lblkno;
> + uint8_t *src = args->value;
> + int blkcnt;
> + int valuelen;
> + int nmap;
> + int error;
> + int offset = 0;
>
> /*
> * Roll through the "value", copying the attribute value to the
> @@ -595,6 +564,72 @@ xfs_attr_rmtval_stale(
> }
>
> /*
> + * Write the value associated with an attribute into the out-of-line buffer
> + * that we have defined for it.
> + */
> +int
> +xfs_attr_rmtval_set(
> + struct xfs_da_args *args)
> +{
> + struct xfs_inode *dp = args->dp;
> + struct xfs_bmbt_irec map;
> + xfs_dablk_t lblkno;
> + int blkcnt;
> + int nmap;
> + int error;
> +
> + trace_xfs_attr_rmtval_set(args);
> +
> + error = xfs_attr_rmt_find_hole(args);
> + if (error)
> + return error;
> +
> + blkcnt = args->rmtblkcnt;
> + lblkno = (xfs_dablk_t)args->rmtblkno;
> + /*
> + * Roll through the "value", allocating blocks on disk as required.
> + */
> + while (blkcnt > 0) {
> + /*
> + * Allocate a single extent, up to the size of the value.
> + *
> + * Note that we have to consider this a data allocation as we
> + * write the remote attribute without logging the contents.
> + * Hence we must ensure that we aren't using blocks that are on
> + * the busy list so that we don't overwrite blocks which have
> + * recently been freed but their transactions are not yet
> + * committed to disk. If we overwrite the contents of a busy
> + * extent and then crash then the block may not contain the
> + * correct metadata after log recovery occurs.
> + */
> + nmap = 1;
> + error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno,
> + blkcnt, XFS_BMAPI_ATTRFORK, args->total, &map,
> + &nmap);
> + if (error)
> + return error;
> + error = xfs_defer_finish(&args->trans);
> + if (error)
> + return error;
> +
> + ASSERT(nmap == 1);
> + ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
> + (map.br_startblock != HOLESTARTBLOCK));
> + lblkno += map.br_blockcount;
> + blkcnt -= map.br_blockcount;
> +
> + /*
> + * Start the next trans in the chain.
> + */
> + error = xfs_trans_roll_inode(&args->trans, dp);
> + if (error)
> + return error;
> + }
> +
> + return xfs_attr_rmtval_set_value(args);
> +}
> +
> +/*
> * Remove the value associated with an attribute by deleting the
> * out-of-line buffer that it is stored on.
> */
>
--
chandan
next prev parent reply other threads:[~2020-02-25 12:50 UTC|newest]
Thread overview: 135+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-23 2:05 [PATCH v7 00/19] xfs: Delayed Ready Attrs Allison Collins
2020-02-23 2:05 ` [PATCH v7 01/19] xfs: Replace attribute parameters with struct xfs_name Allison Collins
2020-02-23 9:34 ` Amir Goldstein
2020-02-23 16:03 ` Allison Collins
2020-02-25 0:49 ` Dave Chinner
2020-02-24 12:08 ` Chandan Rajendra
2020-02-24 16:25 ` Allison Collins
2020-02-24 13:06 ` Brian Foster
2020-02-24 16:25 ` Allison Collins
2020-02-23 2:05 ` [PATCH v7 02/19] xfs: Embed struct xfs_name in xfs_da_args Allison Collins
2020-02-23 11:54 ` Amir Goldstein
2020-02-23 16:51 ` Allison Collins
2020-02-24 6:50 ` Amir Goldstein
2020-02-24 7:36 ` Allison Collins
2020-02-24 7:43 ` Amir Goldstein
2020-02-25 0:57 ` Dave Chinner
2020-02-25 2:00 ` Allison Collins
2020-02-25 4:06 ` Dave Chinner
2020-02-25 4:19 ` Allison Collins
2020-02-25 4:27 ` Darrick J. Wong
2020-02-25 6:07 ` Allison Collins
2020-02-25 6:30 ` Dave Chinner
2020-02-25 17:21 ` Christoph Hellwig
2020-02-25 6:56 ` Chandan Rajendra
2020-02-25 23:26 ` Allison Collins
2020-02-23 2:05 ` [PATCH v7 03/19] xfs: Add xfs_has_attr and subroutines Allison Collins
2020-02-23 12:20 ` Amir Goldstein
2020-02-23 17:28 ` Allison Collins
2020-02-24 6:58 ` Amir Goldstein
2020-02-25 6:26 ` Dave Chinner
2020-02-25 6:43 ` Amir Goldstein
2020-02-25 22:27 ` Dave Chinner
2020-02-24 13:08 ` Brian Foster
2020-02-24 21:18 ` Allison Collins
2020-02-25 13:25 ` Brian Foster
2020-02-26 2:31 ` Allison Collins
2020-02-25 9:49 ` Chandan Rajendra
2020-02-25 10:15 ` Chandan Rajendra
2020-02-26 2:19 ` Allison Collins
2020-02-26 2:18 ` Allison Collins
2020-02-23 2:05 ` [PATCH v7 04/19] xfs: Check for -ENOATTR or -EEXIST Allison Collins
2020-02-23 12:25 ` Amir Goldstein
2020-02-23 17:33 ` Allison Collins
2020-02-24 13:08 ` Brian Foster
2020-02-24 21:18 ` Allison Collins
2020-02-23 2:05 ` [PATCH v7 05/19] xfs: Factor out new helper functions xfs_attr_rmtval_set Allison Collins
2020-02-25 12:53 ` Chandan Rajendra [this message]
2020-02-26 2:20 ` Allison Collins
2020-02-23 2:05 ` [PATCH v7 06/19] xfs: Factor out trans handling in xfs_attr3_leaf_flipflags Allison Collins
2020-02-23 12:30 ` Amir Goldstein
2020-02-23 17:36 ` Allison Collins
2020-02-28 4:56 ` Chandan Rajendra
2020-02-23 2:05 ` [PATCH v7 07/19] xfs: Factor out xfs_attr_leaf_addname helper Allison Collins
2020-02-23 12:42 ` Amir Goldstein
2020-02-23 18:38 ` Allison Collins
2020-02-24 6:38 ` Amir Goldstein
2020-02-24 7:09 ` Allison Collins
2020-02-24 7:27 ` Amir Goldstein
2020-02-25 6:42 ` Dave Chinner
2020-02-25 13:26 ` Brian Foster
2020-02-25 23:26 ` Allison Collins
2020-02-28 6:51 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 08/19] xfs: Refactor xfs_attr_try_sf_addname Allison Collins
2020-02-23 13:04 ` Amir Goldstein
2020-02-23 17:51 ` Allison Collins
2020-02-24 13:08 ` Brian Foster
2020-02-24 21:19 ` Allison Collins
2020-02-28 7:42 ` Chandan Rajendra
2020-02-28 18:14 ` Allison Collins
2020-02-23 2:06 ` [PATCH v7 09/19] xfs: Factor out trans roll from xfs_attr3_leaf_setflag Allison Collins
2020-02-28 7:59 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 10/19] xfs: Factor out xfs_attr_rmtval_invalidate Allison Collins
2020-02-28 10:42 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 11/19] xfs: Factor out trans roll in xfs_attr3_leaf_clearflag Allison Collins
2020-02-28 10:56 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 12/19] xfs: Add helper function xfs_attr_rmtval_unmap Allison Collins
2020-02-24 13:40 ` Brian Foster
2020-02-24 21:44 ` Allison Collins
2020-02-25 13:27 ` Brian Foster
2020-02-26 3:29 ` Allison Collins
2020-02-26 13:47 ` Brian Foster
2020-02-25 7:21 ` Dave Chinner
2020-02-25 23:27 ` Allison Collins
2020-02-28 14:22 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 13/19] xfs: Add delay ready attr remove routines Allison Collins
2020-02-24 15:25 ` Brian Foster
2020-02-24 17:03 ` Brian Foster
2020-02-24 23:14 ` Allison Collins
2020-02-24 23:56 ` Darrick J. Wong
2020-02-25 13:34 ` Brian Foster
2020-02-26 5:36 ` Allison Collins
2020-02-26 13:48 ` Brian Foster
2020-02-26 19:23 ` Allison Collins
2020-02-25 8:57 ` Dave Chinner
2020-02-26 0:57 ` Allison Collins
2020-02-26 22:34 ` Dave Chinner
2020-02-27 4:18 ` Allison Collins
2020-03-03 5:03 ` Chandan Rajendra
2020-03-03 5:40 ` Allison Collins
2020-02-23 2:06 ` [PATCH v7 14/19] xfs: Add delay ready attr set routines Allison Collins
2020-03-03 13:41 ` Chandan Rajendra
2020-03-03 17:07 ` Allison Collins
2020-02-23 2:06 ` [PATCH v7 15/19] xfs: Add helper function xfs_attr_node_shrink Allison Collins
2020-02-23 13:22 ` Amir Goldstein
2020-02-23 18:41 ` Allison Collins
2020-02-25 9:05 ` Dave Chinner
2020-02-26 1:48 ` Allison Collins
2020-02-23 2:06 ` [PATCH v7 16/19] xfs: Simplify xfs_attr_set_iter Allison Collins
2020-02-23 13:26 ` Amir Goldstein
2020-02-23 18:42 ` Allison Collins
2020-02-25 9:21 ` Dave Chinner
2020-02-26 2:13 ` Allison Collins
2020-02-26 22:39 ` Dave Chinner
2020-03-04 4:30 ` Chandan Rajendra
2020-03-04 17:04 ` Allison Collins
2020-03-05 3:39 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 17/19] xfs: Add helper function xfs_attr_leaf_mark_incomplete Allison Collins
2020-02-23 13:47 ` Amir Goldstein
2020-02-23 18:43 ` Allison Collins
2020-02-25 9:31 ` Dave Chinner
2020-02-26 2:17 ` Allison Collins
2020-03-04 4:37 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 18/19] xfs: Add remote block helper functions Allison Collins
2020-02-23 13:45 ` Amir Goldstein
2020-03-04 4:59 ` Chandan Rajendra
2020-02-23 2:06 ` [PATCH v7 19/19] xfs: Remove xfs_attr_rmtval_remove Allison Collins
2020-02-23 13:54 ` Amir Goldstein
2020-02-23 18:50 ` Allison Collins
2020-02-23 7:55 ` [PATCH v7 00/19] xfs: Delayed Ready Attrs Amir Goldstein
2020-02-23 16:02 ` Allison Collins
2020-02-24 6:30 ` Amir Goldstein
2020-02-24 16:23 ` Allison Collins
2020-02-25 5:53 ` Amir Goldstein
2020-02-24 8:31 ` Chandan Rajendra
2020-02-25 9:52 ` Dave Chinner
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