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Fri, 16 Jan 2026 10:12:41 +0000 (GMT) From: Kundan Kumar To: viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, willy@infradead.org, mcgrof@kernel.org, clm@meta.com, david@fromorbit.com, amir73il@gmail.com, axboe@kernel.dk, hch@lst.de, ritesh.list@gmail.com, djwong@kernel.org, dave@stgolabs.net, cem@kernel.org, wangyufei@vivo.com Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, gost.dev@samsung.com, kundan.kumar@samsung.com, anuj20.g@samsung.com, vishak.g@samsung.com, joshi.k@samsung.com Subject: [PATCH v3 2/6] xfs: add helpers to pack AG prediction info for per-folio tracking Date: Fri, 16 Jan 2026 15:38:14 +0530 Message-Id: <20260116100818.7576-3-kundan.kumar@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260116100818.7576-1-kundan.kumar@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CMS-MailID: 20260116101245epcas5p30269c6aa35784db67e6d6ca800a683a7 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20260116101245epcas5p30269c6aa35784db67e6d6ca800a683a7 References: <20260116100818.7576-1-kundan.kumar@samsung.com> X-Rspamd-Queue-Id: 3A019100004 X-Stat-Signature: 33o9uo7wg79ieqyprnpb5zjtb9n81ywf X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1768558370-705598 X-HE-Meta: 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 lt0p7JkE oEzZlyB89qyExcD/zUjPRMViIWR7pApFAgdrmw/E176SC9B9r/qN3szpBKvlWhhkue/tAUFzboc7FQC+fNBiBM2oFqmh+7u4b6c/R+2HEHOV3DuEulfenag0e/2IxOcEeiUzJ0g6mEq+fy3ELeP2TjHdjnIvuoFZf782q X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Introduce helper routines to pack and unpack AG prediction metadata for folios. This provides a compact and self-contained representation for AG tracking. The packed layout uses: - bit 31 : valid - bit 24-30 : iomap type - bit 0-23 : AG number Signed-off-by: Kundan Kumar Signed-off-by: Anuj Gupta --- fs/xfs/xfs_iomap.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h index ebcce7d49446..eaf4513f6759 100644 --- a/fs/xfs/xfs_iomap.h +++ b/fs/xfs/xfs_iomap.h @@ -12,6 +12,37 @@ struct xfs_inode; struct xfs_bmbt_irec; struct xfs_zone_alloc_ctx; +/* pack prediction in a u32 stored in xarray */ +#define XFS_AGP_VALID_SHIFT 31 +#define XFS_AGP_TYPE_SHIFT 24 +#define XFS_AGP_TYPE_MASK 0x7fu +#define XFS_AGP_AGNO_MASK 0x00ffffffu + +static inline u32 xfs_agp_pack(u32 agno, u8 iomap_type, bool valid) +{ + u32 v = agno & XFS_AGP_AGNO_MASK; + + v |= ((u32)iomap_type & XFS_AGP_TYPE_MASK) << XFS_AGP_TYPE_SHIFT; + if (valid) + v |= (1u << XFS_AGP_VALID_SHIFT); + return v; +} + +static inline bool xfs_agp_valid(u32 v) +{ + return v >> XFS_AGP_VALID_SHIFT; +} + +static inline u32 xfs_agp_agno(u32 v) +{ + return v & XFS_AGP_AGNO_MASK; +} + +static inline u8 xfs_agp_type(u32 v) +{ + return (u8)((v >> XFS_AGP_TYPE_SHIFT) & XFS_AGP_TYPE_MASK); +} + int xfs_iomap_write_direct(struct xfs_inode *ip, xfs_fileoff_t offset_fsb, xfs_fileoff_t count_fsb, unsigned int flags, struct xfs_bmbt_irec *imap, u64 *sequence); -- 2.25.1