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linux/fs/zonefs/sysfs.c

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zonefs: Export open zone resource information through sysfs To allow applications to easily check the current usage status of the open zone resources of the mounted device, export through sysfs the counter of write open sequential files s_wro_seq_files field of struct zonefs_sb_info. The attribute is named nr_wro_seq_files and is read only. The maximum number of write open sequential files (zones) indicated by the s_max_wro_seq_files field of struct zonefs_sb_info is also exported as the read only attribute max_wro_seq_files. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
2022-04-12 16:25:34 +09:00
zonefs: Add active seq file accounting Modify struct zonefs_sb_info to add the s_active_seq_files atomic to count the number of seq files representing a zone that is partially written or explicitly open, that is, to count sequential files with a zone that is in an active state on the device. The helper function zonefs_account_active() is introduced to update this counter whenever a file is written or truncated. This helper is also used in the zonefs_seq_file_write_open() and zonefs_seq_file_write_close() functions when the explicit_open mount option is used. The s_active_seq_files counter is exported through sysfs using the read-only attribute nr_active_seq_files. The device maximum number of active zones is also exported through sysfs with the read-only attribute max_active_seq_files. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
2022-04-12 18:54:39 +09:00
zonefs: Export open zone resource information through sysfs To allow applications to easily check the current usage status of the open zone resources of the mounted device, export through sysfs the counter of write open sequential files s_wro_seq_files field of struct zonefs_sb_info. The attribute is named nr_wro_seq_files and is read only. The maximum number of write open sequential files (zones) indicated by the s_max_wro_seq_files field of struct zonefs_sb_info is also exported as the read only attribute max_wro_seq_files. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
2022-04-12 16:25:34 +09:00
zonefs: Add active seq file accounting Modify struct zonefs_sb_info to add the s_active_seq_files atomic to count the number of seq files representing a zone that is partially written or explicitly open, that is, to count sequential files with a zone that is in an active state on the device. The helper function zonefs_account_active() is introduced to update this counter whenever a file is written or truncated. This helper is also used in the zonefs_seq_file_write_open() and zonefs_seq_file_write_close() functions when the explicit_open mount option is used. The s_active_seq_files counter is exported through sysfs using the read-only attribute nr_active_seq_files. The device maximum number of active zones is also exported through sysfs with the read-only attribute max_active_seq_files. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
2022-04-12 18:54:39 +09:00
zonefs: Export open zone resource information through sysfs To allow applications to easily check the current usage status of the open zone resources of the mounted device, export through sysfs the counter of write open sequential files s_wro_seq_files field of struct zonefs_sb_info. The attribute is named nr_wro_seq_files and is read only. The maximum number of write open sequential files (zones) indicated by the s_max_wro_seq_files field of struct zonefs_sb_info is also exported as the read only attribute max_wro_seq_files. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
2022-04-12 16:25:34 +09:00
zonefs: make kobj_type structure constant Since commit ee6d3dd4ed48 ("driver core: make kobj_type constant.") the driver core allows the usage of const struct kobj_type. Take advantage of this to constify the structure definition to prevent modification at runtime. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
2023-02-10 02:14:44 +00:00
zonefs: Export open zone resource information through sysfs To allow applications to easily check the current usage status of the open zone resources of the mounted device, export through sysfs the counter of write open sequential files s_wro_seq_files field of struct zonefs_sb_info. The attribute is named nr_wro_seq_files and is read only. The maximum number of write open sequential files (zones) indicated by the s_max_wro_seq_files field of struct zonefs_sb_info is also exported as the read only attribute max_wro_seq_files. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
2022-04-12 16:25:34 +09:00
zonefs: add support for FS_IOC_GETFSSYSFSPATH FS_IOC_GETFSSYSFSPATH ioctl expects sysfs sub-path of a filesystem, the format can be "$FSTYP/$SYSFS_IDENTIFIER" under /sys/fs, it can helps to standardizes exporting sysfs datas across filesystems. This patch wires up FS_IOC_GETFSSYSFSPATH for zonefs, it will output "zonefs/<dev>". Signed-off-by: Liao Chen <liaochen4@huawei.com> Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
2024-08-20 02:20:29 +00:00
zonefs: Export open zone resource information through sysfs To allow applications to easily check the current usage status of the open zone resources of the mounted device, export through sysfs the counter of write open sequential files s_wro_seq_files field of struct zonefs_sb_info. The attribute is named nr_wro_seq_files and is read only. The maximum number of write open sequential files (zones) indicated by the s_max_wro_seq_files field of struct zonefs_sb_info is also exported as the read only attribute max_wro_seq_files. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
2022-04-12 16:25:34 +09:00