236 lines
9.1 KiB
Diff
236 lines
9.1 KiB
Diff
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From d62c16ff35a17743c2a0f8ebfb39f84064afcb3c Mon Sep 17 00:00:00 2001
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From: Filip Bozuta <Filip.Bozuta@syrmia.com>
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Date: Thu, 3 Sep 2020 01:27:00 +0200
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Subject: [PATCH 8/9] linux-user: Add support for btrfs ioctls used to manage
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quota
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This patch implements functionality for following ioctls:
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BTRFS_IOC_QUOTA_CTL - Enabling/Disabling quota support
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Enable or disable quota support for a btrfs filesystem. Quota
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support is enabled or disabled using the ioctls third argument
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which represents a pointer to a following type:
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struct btrfs_ioctl_quota_ctl_args {
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__u64 cmd;
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__u64 status;
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};
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Before calling this ioctl, the 'cmd' field should be filled
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with one of the values 'BTRFS_QUOTA_CTL_ENABLE' (enabling quota)
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'BTRFS_QUOTA_CTL_DISABLE' (disabling quota).
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BTRFS_IOC_QGROUP_CREATE - Creating/Removing a subvolume quota group
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Create or remove a subvolume quota group. The subvolume quota
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group is created or removed using the ioctl's third argument which
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represents a pointer to a following type:
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struct btrfs_ioctl_qgroup_create_args {
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__u64 create;
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__u64 qgroupid;
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};
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Before calling this ioctl, the 'create' field should be filled
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with the aproppriate value depending on if the user wants to
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create or remove a quota group (0 for removing, everything else
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for creating). Also, the 'qgroupid' field should be filled with
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the value for the quota group id that is to be created.
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BTRFS_IOC_QGROUP_ASSIGN - Asigning or removing a quota group as child group
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Asign or remove a quota group as child quota group of another
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group in the btrfs filesystem. The asignment is done using the
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ioctl's third argument which represents a pointert to a following type:
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struct btrfs_ioctl_qgroup_assign_args {
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__u64 assign;
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__u64 src;
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__u64 dst;
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};
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Before calling this ioctl, the 'assign' field should be filled with
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the aproppriate value depending on if the user wants to asign or remove
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a quota group as a child quota group of another group (0 for removing,
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everythin else for asigning). Also, the 'src' and 'dst' fields should
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be filled with the aproppriate quota group id values depending on which
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quota group needs to asigned or removed as child quota group of another
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group ('src' gets asigned or removed as child group of 'dst').
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BTRFS_IOC_QGROUP_LIMIT - Limiting the size of a quota group
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Limit the size of a quota group. The size of the quota group is limited
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with the ioctls third argument which represents a pointer to a following
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type:
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struct btrfs_ioctl_qgroup_limit_args {
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__u64 qgroupid;
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struct btrfs_qgroup_limit lim;
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};
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Before calling this ioctl, the 'qgroup' id field should be filled with
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aproppriate value of the quota group id for which the size is to be
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limited. The second field is of following type:
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struct btrfs_qgroup_limit {
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__u64 flags;
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__u64 max_rfer;
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__u64 max_excl;
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__u64 rsv_rfer;
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__u64 rsv_excl;
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};
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The 'max_rfer' field should be filled with the size to which the quota
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group should be limited. The 'flags' field can be used for passing
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additional options and can have values which can be found on:
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https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/btrfs.h#L67
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BTRFS_IOC_QUOTA_RESCAN_STATUS - Checking status of running rescan operation
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Check status of a running rescan operation. The status is checked using
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the ioctl's third argument which represents a pointer to a following type:
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struct btrfs_ioctl_quota_rescan_args {
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__u64 flags;
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__u64 progress;
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__u64 reserved[6];
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};
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If there is a rescan operation running, 'flags' field is set to 1, and
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'progress' field is set to aproppriate value which represents the progress
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of the operation.
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BTRFS_IOC_QUOTA_RESCAN - Starting a rescan operation
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Start ar rescan operation to Trash all quota groups and scan the metadata
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again with the current config. Before calling this ioctl,
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BTRFS_IOC_QUOTA_RESCAN_STATUS sould be run to check if there is already a
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rescan operation runing. After that ioctl call, the received
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'struct btrfs_ioctl_quota_rescan_args' should be than passed as this ioctls
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third argument.
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BTRFS_IOC_QUOTA_RESCAN_WAIT - Waiting for a rescan operation to finish
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Wait until a rescan operation is finished (if there is a rescan operation
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running). The third ioctls argument is ignored.
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Implementation notes:
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Almost all of the ioctls in this patch use structure types as third arguments.
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That is the reason why aproppriate thunk definitions were added in file
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'syscall_types.h'.
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Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
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Tested-by: Daniel P. Berrangé <berrange@redhat.com>
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Message-Id: <20200823195014.116226-8-Filip.Bozuta@syrmia.com>
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Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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---
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linux-user/ioctls.h | 27 +++++++++++++++++++++++++++
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linux-user/syscall_defs.h | 7 +++++++
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linux-user/syscall_types.h | 29 +++++++++++++++++++++++++++++
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3 files changed, 63 insertions(+)
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diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
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index 728880b9f3..882bfb3e88 100644
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--- a/linux-user/ioctls.h
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+++ b/linux-user/ioctls.h
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@@ -227,6 +227,33 @@
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IOCTL(BTRFS_IOC_LOGICAL_INO, IOC_RW,
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MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_logical_ino_args)))
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#endif
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+#ifdef BTRFS_IOC_QUOTA_CTL
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+ IOCTL(BTRFS_IOC_QUOTA_CTL, IOC_RW,
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+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_quota_ctl_args)))
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+#endif
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+#ifdef BTRFS_IOC_QGROUP_ASSIGN
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+ IOCTL(BTRFS_IOC_QGROUP_ASSIGN, IOC_W,
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+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_qgroup_assign_args)))
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+#endif
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+#ifdef BTRFS_IOC_QGROUP_CREATE
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+ IOCTL(BTRFS_IOC_QGROUP_CREATE, IOC_W,
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+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_qgroup_create_args)))
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+#endif
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+#ifdef BTRFS_IOC_QGROUP_LIMIT
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+ IOCTL(BTRFS_IOC_QGROUP_LIMIT, IOC_R,
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+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_qgroup_limit_args)))
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+#endif
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+#ifdef BTRFS_IOC_QUOTA_RESCAN
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+ IOCTL(BTRFS_IOC_QUOTA_RESCAN, IOC_W,
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+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_quota_rescan_args)))
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+#endif
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+#ifdef BTRFS_IOC_QUOTA_RESCAN_STATUS
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+ IOCTL(BTRFS_IOC_QUOTA_RESCAN_STATUS, IOC_R,
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+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_quota_rescan_args)))
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+#endif
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+#ifdef BTRFS_IOC_QUOTA_RESCAN_WAIT
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+ IOCTL(BTRFS_IOC_QUOTA_RESCAN_WAIT, 0, TYPE_NULL)
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+#endif
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#ifdef BTRFS_IOC_GET_DEV_STATS
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IOCTL(BTRFS_IOC_GET_DEV_STATS, IOC_RW,
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MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_dev_stats)))
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diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
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index 1d0bfb5479..10a7f91016 100644
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--- a/linux-user/syscall_defs.h
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+++ b/linux-user/syscall_defs.h
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@@ -985,6 +985,13 @@ struct target_rtc_pll_info {
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#define TARGET_BTRFS_IOC_DEV_INFO TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 30)
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#define TARGET_BTRFS_IOC_INO_PATHS TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 35)
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#define TARGET_BTRFS_IOC_LOGICAL_INO TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 36)
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+#define TARGET_BTRFS_IOC_QUOTA_CTL TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 40)
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+#define TARGET_BTRFS_IOC_QGROUP_ASSIGN TARGET_IOWU(BTRFS_IOCTL_MAGIC, 41)
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+#define TARGET_BTRFS_IOC_QGROUP_CREATE TARGET_IOWU(BTRFS_IOCTL_MAGIC, 42)
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+#define TARGET_BTRFS_IOC_QGROUP_LIMIT TARGET_IORU(BTRFS_IOCTL_MAGIC, 43)
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+#define TARGET_BTRFS_IOC_QUOTA_RESCAN TARGET_IOWU(BTRFS_IOCTL_MAGIC, 44)
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+#define TARGET_BTRFS_IOC_QUOTA_RESCAN_STATUS TARGET_IORU(BTRFS_IOCTL_MAGIC, 45)
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+#define TARGET_BTRFS_IOC_QUOTA_RESCAN_WAIT TARGET_IO(BTRFS_IOCTL_MAGIC, 46)
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#define TARGET_BTRFS_IOC_GET_DEV_STATS TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 52)
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#define TARGET_BTRFS_IOC_GET_FEATURES TARGET_IORU(BTRFS_IOCTL_MAGIC, 57)
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#define TARGET_BTRFS_IOC_SET_FEATURES TARGET_IOWU(BTRFS_IOCTL_MAGIC, 57)
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diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
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index 5566d101c2..d9b7106a69 100644
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--- a/linux-user/syscall_types.h
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+++ b/linux-user/syscall_types.h
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@@ -454,6 +454,35 @@ STRUCT(btrfs_ioctl_get_dev_stats,
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128 - 2 - BTRFS_DEV_STAT_VALUES_MAX)) /* unused */
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#endif
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+STRUCT(btrfs_ioctl_quota_ctl_args,
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+ TYPE_ULONGLONG, /* cmd */
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+ TYPE_ULONGLONG) /* status */
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+
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+STRUCT(btrfs_ioctl_quota_rescan_args,
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+ TYPE_ULONGLONG, /* flags */
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+ TYPE_ULONGLONG, /* progress */
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+ MK_ARRAY(TYPE_ULONGLONG, 6)) /* reserved */
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+
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+STRUCT(btrfs_ioctl_qgroup_assign_args,
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+ TYPE_ULONGLONG, /* assign */
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+ TYPE_ULONGLONG, /* src */
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+ TYPE_ULONGLONG) /* dst */
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+
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+STRUCT(btrfs_ioctl_qgroup_create_args,
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+ TYPE_ULONGLONG, /* create */
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+ TYPE_ULONGLONG) /* qgroupid */
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+
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+STRUCT(btrfs_qgroup_limit,
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+ TYPE_ULONGLONG, /* flags */
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+ TYPE_ULONGLONG, /* max_rfer */
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+ TYPE_ULONGLONG, /* max_excl */
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+ TYPE_ULONGLONG, /* rsv_rfer */
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+ TYPE_ULONGLONG) /* rsv_excl */
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+
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+STRUCT(btrfs_ioctl_qgroup_limit_args,
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+ TYPE_ULONGLONG, /* qgroupid */
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+ MK_STRUCT(STRUCT_btrfs_qgroup_limit)) /* lim */
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+
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STRUCT(btrfs_ioctl_feature_flags,
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TYPE_ULONGLONG, /* compat_flags */
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TYPE_ULONGLONG, /* compat_ro_flags */
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--
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2.26.2
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