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mirror_zfs/udev/rules.d/60-zvol.rules.in

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Fix a couple comments Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2011-04-07 10:47:02 +04:00
# Persistent links for zvol
Use udev to create /dev/zvol/[dataset_name] links This commit allows zvols with names longer than 32 characters, which fixes issue on https://github.com/behlendorf/zfs/issues/#issue/102. Changes include: - use /dev/zd* device names for zvol, where * is the device minor (include/sys/fs/zfs.h, module/zfs/zvol.c). - add BLKZNAME ioctl to get dataset name from userland (include/sys/fs/zfs.h, module/zfs/zvol.c, cmd/zvol_id). - add udev rule to create /dev/zvol/[dataset_name] and the legacy /dev/[dataset_name] symlink. For partitions on zvol, it will create /dev/zvol/[dataset_name]-part* (etc/udev/rules.d/60-zvol.rules, cmd/zvol_id). Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2011-02-22 13:58:44 +03:00
#
# persistent disk links: /dev/zvol/dataset_name
Udev rules: remove zvol compat symlinks (without the leading zvol/) This is a potentially arguable change, because it removes some compatibility cruft that certain systems or people may have come to rely on (either a very long time ago, or unwisely in recent times). On the other hand, it's been literally over a decade since OpenZFS switched to the strategy of using opaque numbered /dev/zd* device nodes, with the canonical zvol access path being a directory tree of symlinks created by udev rules inside /dev/zvol/*. (See #102.) Even at the time, the /dev/* scheme was labeled as being for "compatibility". This commit removes the second tree of symlinks located directly at /dev/*, under the assumption that anybody with any sense has been using the intended /dev/zvol/* path for a very very long time now. (The more I think about this, the more I anticipate that some large fraction of people will have been blissfully unaware that the intention has been for them to use the /dev/zvol/* tree all along, and they will have come to rely upon the /dev/* tree simply because it's been there this whole time despite being a compat thing.) Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed-by: Neal Gompa <ngompa@datto.com> Signed-off-by: Justin Gottula <justin@jgottula.com> Closes #12303
2021-07-06 23:41:17 +03:00
#
# NOTE: We used to also create an additional tree of zvol symlinks located at
# /dev/dataset_name (i.e. without the 'zvol' path component) for
# compatibility reasons. These are no longer created anymore, and should
# not be relied upon.
#
Use udev to create /dev/zvol/[dataset_name] links This commit allows zvols with names longer than 32 characters, which fixes issue on https://github.com/behlendorf/zfs/issues/#issue/102. Changes include: - use /dev/zd* device names for zvol, where * is the device minor (include/sys/fs/zfs.h, module/zfs/zvol.c). - add BLKZNAME ioctl to get dataset name from userland (include/sys/fs/zfs.h, module/zfs/zvol.c, cmd/zvol_id). - add udev rule to create /dev/zvol/[dataset_name] and the legacy /dev/[dataset_name] symlink. For partitions on zvol, it will create /dev/zvol/[dataset_name]-part* (etc/udev/rules.d/60-zvol.rules, cmd/zvol_id). Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2011-02-22 13:58:44 +03:00
Udev rules: remove zvol compat symlinks (without the leading zvol/) This is a potentially arguable change, because it removes some compatibility cruft that certain systems or people may have come to rely on (either a very long time ago, or unwisely in recent times). On the other hand, it's been literally over a decade since OpenZFS switched to the strategy of using opaque numbered /dev/zd* device nodes, with the canonical zvol access path being a directory tree of symlinks created by udev rules inside /dev/zvol/*. (See #102.) Even at the time, the /dev/* scheme was labeled as being for "compatibility". This commit removes the second tree of symlinks located directly at /dev/*, under the assumption that anybody with any sense has been using the intended /dev/zvol/* path for a very very long time now. (The more I think about this, the more I anticipate that some large fraction of people will have been blissfully unaware that the intention has been for them to use the /dev/zvol/* tree all along, and they will have come to rely upon the /dev/* tree simply because it's been there this whole time despite being a compat thing.) Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com> Reviewed-by: Neal Gompa <ngompa@datto.com> Signed-off-by: Justin Gottula <justin@jgottula.com> Closes #12303
2021-07-06 23:41:17 +03:00
KERNEL=="zd*", SUBSYSTEM=="block", ACTION=="add|change", PROGRAM=="@udevdir@/zvol_id $devnode", SYMLINK+="zvol/%c"
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