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Aivazian" , David Sterba , OGAWA Hirofumi , Muchun Song , Oscar Salvador , David Hildenbrand , linux-mm@kvack.org, linux-aio@kvack.org, Benjamin LaHaise , Jan Kara Subject: [PATCH 26/32] fat: Track metadata bhs in fs-private inode part Date: Tue, 3 Mar 2026 11:34:15 +0100 Message-ID: <20260303103406.4355-58-jack@suse.cz> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260303101717.27224-1-jack@suse.cz> References: <20260303101717.27224-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3643; i=jack@suse.cz; h=from:subject; bh=Klr3Q6lGdMhw22T2C4rNmSbbaDsuD4ARFy1ctXsRIyk=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBpprk0Nb8WTsiqrQ3wqnPABtD09KVhX/JnKzkH3 rJjNnj+NYuJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCaaa5NAAKCRCcnaoHP2RA 2eBUB/9c2t4EJuyg5ObQzoujC/9QbgxvCribk+6P6bTsMxvA37XBmEqV+SkD+FVEUhka6b0j9sg BQDNaItJOfnpGhaxyPNv5cRkSGtAh9a0J2GCubFQo0WoF5ecngxkUDsgnHN6d3j/3CHUtxsvDDf xYVv7/ISwTP1YGY7do1bbUKPFbsIqzt41T0c+ljeZbaDfOXP87RnDKnUtm/bygbnCZoDXmOsLKi oGHLeazAQ+eBGyiUnhxO9VGOdDQdT4QLSQxKNtZbvz0mrfyBBKA3t5x1imOElYSpOGzkEUhMyhb ybtTjz5zMRKRnsf03fWfeNTplX7eKUkP+c0mEDAG/OSot9gr X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Content-Transfer-Encoding: 8bit X-Stat-Signature: b6tca5wkdz5mm8csdtj5446nnhemj5an X-Rspamd-Server: rspam09 X-Rspam-User: X-Rspamd-Queue-Id: AE4348000F X-HE-Tag: 1772534151-858285 X-HE-Meta: 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 /pkeAol3 Cl/KnFhRRKcjup6lPK3+31RbIRRDr8J6F1lp6qEO8atmZqhtgCHAaMcYHFvHY26/rJVjnAWVorP58zJDa7sxPuV5j4elG/Cb7W2pQ+FRWR5Cm6Lr9PQLH2Bd2+CYHbCMruHLfjgXu7yOu5SlvMqz0+/3ufVz8KFOZVZKkNNmnZ2I0hbELcFH5Ls7eJ5X6NOhhQ6iMLmZx41SYJBwEywAjmB1bZCriIv0ARwR/TZFLoiq6I/WoEvTUDqlkXVHekheIhrq3Dxyp2Tzbl7jnOP8GAop0gLlzBIHumLKHhakw8XW8vytmReu0imNOEA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Track metadata bhs for an inode in fs-private part of the inode. Signed-off-by: Jan Kara --- fs/fat/fat.h | 2 ++ fs/fat/file.c | 1 + fs/fat/inode.c | 12 ++++++++++++ fs/fat/namei_msdos.c | 1 + fs/fat/namei_vfat.c | 1 + 5 files changed, 17 insertions(+) diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 0d269dba897b..2b2f6ad32f24 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -130,6 +130,7 @@ struct msdos_inode_info { struct hlist_node i_dir_hash; /* hash by i_logstart */ struct rw_semaphore truncate_lock; /* protect bmap against truncate */ struct timespec64 i_crtime; /* File creation (birth) time */ + struct mapping_metadata_bhs i_metadata_bhs; struct inode vfs_inode; }; @@ -424,6 +425,7 @@ extern int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de); extern int fat_flush_inodes(struct super_block *sb, struct inode *i1, struct inode *i2); +struct mapping_metadata_bhs *fat_get_metadata_bhs(struct inode *inode); extern const struct fs_parameter_spec fat_param_spec[]; int fat_init_fs_context(struct fs_context *fc, bool is_vfat); diff --git a/fs/fat/file.c b/fs/fat/file.c index 124d9c5431c8..da21636d3874 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -574,4 +574,5 @@ const struct inode_operations fat_file_inode_operations = { .setattr = fat_setattr, .getattr = fat_getattr, .update_time = fat_update_time, + .get_metadata_bhs = fat_get_metadata_bhs, }; diff --git a/fs/fat/inode.c b/fs/fat/inode.c index ce88602b0d57..8561b8be5ca2 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -763,6 +763,7 @@ static struct inode *fat_alloc_inode(struct super_block *sb) ei->i_pos = 0; ei->i_crtime.tv_sec = 0; ei->i_crtime.tv_nsec = 0; + mmb_init(&ei->i_metadata_bhs); return &ei->vfs_inode; } @@ -807,6 +808,12 @@ static void __exit fat_destroy_inodecache(void) kmem_cache_destroy(fat_inode_cachep); } +struct mapping_metadata_bhs *fat_get_metadata_bhs(struct inode *inode) +{ + return &MSDOS_I(inode)->i_metadata_bhs; +} +EXPORT_SYMBOL_GPL(fat_get_metadata_bhs); + int fat_reconfigure(struct fs_context *fc) { bool new_rdonly; @@ -1531,6 +1538,10 @@ static int fat_read_static_bpb(struct super_block *sb, return error; } +static const struct inode_operations fat_table_inode_operations = { + .get_metadata_bhs = fat_get_metadata_bhs, +}; + /* * Read the super block of an MS-DOS FS. */ @@ -1806,6 +1817,7 @@ int fat_fill_super(struct super_block *sb, struct fs_context *fc, fat_inode = new_inode(sb); if (!fat_inode) goto out_fail; + fat_inode->i_op = &fat_table_inode_operations; sbi->fat_inode = fat_inode; fsinfo_inode = new_inode(sb); diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c index 048c103b506a..1526b8910d51 100644 --- a/fs/fat/namei_msdos.c +++ b/fs/fat/namei_msdos.c @@ -643,6 +643,7 @@ static const struct inode_operations msdos_dir_inode_operations = { .setattr = fat_setattr, .getattr = fat_getattr, .update_time = fat_update_time, + .get_metadata_bhs = fat_get_metadata_bhs, }; static void setup(struct super_block *sb) diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 87dcdd86272b..ca5e0e9822a6 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -1186,6 +1186,7 @@ static const struct inode_operations vfat_dir_inode_operations = { .setattr = fat_setattr, .getattr = fat_getattr, .update_time = fat_update_time, + .get_metadata_bhs = fat_get_metadata_bhs, }; static void setup(struct super_block *sb) -- 2.51.0