* [PATCH 0/4] Add support for a group of btrfs ioctls - 2
@ 2020-07-17 14:04 Filip Bozuta
2020-07-17 14:04 ` [PATCH 1/4] linux-user: Add support for a group of btrfs inode ioctls Filip Bozuta
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Filip Bozuta @ 2020-07-17 14:04 UTC (permalink / raw)
To: qemu-devel; +Cc: riku.voipio, laurent
This series covers support for following btrfs ioctls
*BTRFS_IOC_DEFAULT_SUBVOL *BTRFS_IOC_QUOTA_RESCAN
*BTRFS_IOC_GET_SUBVOL_ROOTREF *BTRFS_IOC_QUOTA_RESCAN_WAIT
*BTRFS_IOC_QUOTA_CTL *BTRFS_IOC_SCRUB
*BTRFS_IOC_QGROUP_CREATE *BTRFS_IOC_SCRUB_CANCEL
*BTRFS_IOC_QGROUP_ASSIGN *BTRFS_IOC_SCRUB_PROGRESS
*BTRFS_IOC_INO_PATHS *BTRFS_IOC_QGROUP_LIMIT
*BTRFS_IOC_LOGICAL_INO *BTRFS_IOC_QUOTA_RESCAN_STATUS
*BTRFS_IOC_LOGICAL_INO_V2
*BTRFS_IOC_INO_LOOKUP_USER
*BTRFS_IOC_INO_LOOKUP
The functionalities of individual ioctls were described in this series
patch commit messages. Since all of these ioctls are added in kernel
version 3.9, their definitions in file 'linux-user/ioctls.h' are
enwrapped in an #ifdef directive.
Testing method:
Mini test programs were written for these ioctls. These test programs
can be found on a repository which is located on the link:
https://github.com/bozutaf/btrfs-tests
These test programs were compiled (sometimes using cross compilers) for
following architectures:
* Intel 64-bit (little endian)
* Power pc 32-bit (big endian)
* Power pc 64-bit (big endian)
The corresponding native programs were executed without using QEMU on
an intel x86_64 host.
All applicable compiled programs were in turn executed through QEMU
and the results obtained were the same ones gotten for native
execution.
Based-on: <20200709155203.21106-1-Filip.Bozuta@syrmia.com>
Filip Bozuta (4):
linux-user: Add support for a group of btrfs inode ioctls
linux-user: Add support for two btrfs ioctls used for subvolume
linux-user: Add support for btrfs ioctls used to manage quota
linux-user: Add support for btrfs ioctls used to scrub a filesystem
linux-user/ioctls.h | 65 +++++++++++++++++++++++++++
linux-user/syscall_defs.h | 34 ++++++++++++++
linux-user/syscall_types.h | 90 ++++++++++++++++++++++++++++++++++++++
3 files changed, 189 insertions(+)
--
2.25.1
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH 1/4] linux-user: Add support for a group of btrfs inode ioctls
2020-07-17 14:04 [PATCH 0/4] Add support for a group of btrfs ioctls - 2 Filip Bozuta
@ 2020-07-17 14:04 ` Filip Bozuta
2020-07-17 14:04 ` [PATCH 2/4] linux-user: Add support for two btrfs ioctls used for subvolume Filip Bozuta
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Filip Bozuta @ 2020-07-17 14:04 UTC (permalink / raw)
To: qemu-devel; +Cc: riku.voipio, laurent
This patch implements functionality of following ioctls:
BTRFS_IOC_INO_LOOKUP - Reading tree root id and path
Read tree root id and path for a given file or directory.
The name and tree root id are returned in an ioctl's third
argument that represents a pointer to a following type:
struct btrfs_ioctl_ino_lookup_args {
__u64 treeid;
__u64 objectid;
char name[BTRFS_INO_LOOKUP_PATH_MAX];
};
Before calling this ioctl, field 'objectid' should be filled
with the object id value for which the tree id and path are
to be read. Value 'BTRFS_FIRST_FREE_OBJECTID' represents the
object id for the first available btrfs object (directory or
file).
BTRFS_IOC_INO_PATHS - Reading paths to all files
Read path to all files with a certain inode number. The paths
are returned in the ioctl's third argument which represents
a pointer to a following type:
struct btrfs_ioctl_ino_path_args {
__u64 inum; /* in */
__u64 size; /* in */
__u64 reserved[4];
/* struct btrfs_data_container *fspath; out */
__u64 fspath; /* out */
};
Before calling this ioctl, the 'inum' and 'size' field should
be filled with the aproppriate inode number and size of the
directory where file paths should be looked for. For now, the
paths are returned in an '__u64' (unsigned long long) value
'fspath'.
BTRFS_IOC_LOGICAL_INO - Reading inode numbers
Read inode numbers for files on a certain logical adress. The
inode numbers are returned in the ioctl's third argument which
represents a pointer to a following type:
struct btrfs_ioctl_logical_ino_args {
__u64 logical; /* in */
__u64 size; /* in */
__u64 reserved[3]; /* must be 0 for now */
__u64 flags; /* in, v2 only */
/* struct btrfs_data_container *inodes; out */
__u64 inodes;
};
Before calling this ioctl, the 'logical' and 'size' field should
be filled with the aproppriate logical adress and size of where
the inode numbers of files should be looked for. For now, the
inode numbers are returned in an '__u64' (unsigned long long)
value 'inodes'.
BTRFS_IOC_LOGICAL_INO_V2 - Reading inode numbers
Same as the above mentioned ioctl except that it allows passing
a flags 'BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET'.
BTRFS_IOC_INO_LOOKUP_USER - Reading subvolume name and path
Read name and path of a subvolume. The tree root id and
path are read in an ioctl's third argument which represents a
pointer to a following type:
struct btrfs_ioctl_ino_lookup_user_args {
/* in, inode number containing the subvolume of 'subvolid' */
__u64 dirid;
/* in */
__u64 treeid;
/* out, name of the subvolume of 'treeid' */
char name[BTRFS_VOL_NAME_MAX + 1];
/*
* out, constructed path from the directory with which the ioctl is
* called to dirid
*/
char path[BTRFS_INO_LOOKUP_USER_PATH_MAX];
};
Before calling this ioctl, the 'dirid' and 'treeid' field should
be filled with aproppriate values which represent the inode number
of the directory that contains the subvolume and treeid of the
subvolume.
Implementation notes:
All of the ioctls in this patch use structure types as third arguments.
That is the reason why aproppriate thunk definitions were added in file
'syscall_types.h'.
---
linux-user/ioctls.h | 20 ++++++++++++++++++++
linux-user/syscall_defs.h | 10 ++++++++++
linux-user/syscall_types.h | 24 ++++++++++++++++++++++++
3 files changed, 54 insertions(+)
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index c6303a0406..a7f5664487 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -202,6 +202,10 @@
IOCTL(BTRFS_IOC_SNAP_DESTROY, IOC_W,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_vol_args)))
#endif
+#ifdef BTRFS_IOC_INO_LOOKUP
+ IOCTL(BTRFS_IOC_INO_LOOKUP, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_ino_lookup_args)))
+#endif
#ifdef BTRFS_IOC_SUBVOL_GETFLAGS
IOCTL(BTRFS_IOC_SUBVOL_GETFLAGS, IOC_R, MK_PTR(TYPE_ULONGLONG))
#endif
@@ -212,6 +216,14 @@
IOCTL(BTRFS_IOC_DEV_INFO, IOC_RW,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_dev_info_args)))
#endif
+#ifdef BTRFS_IOC_INO_PATHS
+ IOCTL(BTRFS_IOC_INO_PATHS, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_ino_path_args)))
+#endif
+#ifdef BTRFS_IOC_LOGICAL_INO
+ IOCTL(BTRFS_IOC_LOGICAL_INO, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_logical_ino_args)))
+#endif
#ifdef BTRFS_IOC_GET_DEV_STATS
IOCTL(BTRFS_IOC_GET_DEV_STATS, IOC_RW,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_dev_stats)))
@@ -228,10 +240,18 @@
IOCTL(BTRFS_IOC_GET_SUPPORTED_FEATURES, IOC_R,
MK_PTR(MK_ARRAY(MK_STRUCT(STRUCT_btrfs_ioctl_feature_flags), 3)))
#endif
+#ifdef BTRFS_IOC_LOGICAL_INO_V2
+ IOCTL(BTRFS_IOC_LOGICAL_INO_V2, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_logical_ino_args)))
+#endif
#ifdef BTRFS_IOC_GET_SUBVOL_INFO
IOCTL(BTRFS_IOC_GET_SUBVOL_INFO, IOC_R,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_subvol_info_args)))
#endif
+#ifdef BTRFS_IOC_INO_LOOKUP_USER
+ IOCTL(BTRFS_IOC_INO_LOOKUP_USER, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_ino_lookup_user_args)))
+#endif
#ifdef CONFIG_USBFS
/* USB ioctls */
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 9db6f46cba..7bb105428b 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -982,12 +982,18 @@ struct target_rtc_pll_info {
14, struct btrfs_ioctl_vol_args)
#define TARGET_BTRFS_IOC_SNAP_DESTROY TARGET_IOW(BTRFS_IOCTL_MAGIC, \
15, struct btrfs_ioctl_vol_args)
+#define TARGET_BTRFS_IOC_INO_LOOKUP TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 18, struct btrfs_ioctl_ino_lookup_args)
#define TARGET_BTRFS_IOC_SUBVOL_GETFLAGS TARGET_IOR(BTRFS_IOCTL_MAGIC, \
25, abi_ullong)
#define TARGET_BTRFS_IOC_SUBVOL_SETFLAGS TARGET_IOW(BTRFS_IOCTL_MAGIC, \
26, abi_ullong)
#define TARGET_BTRFS_IOC_DEV_INFO TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
30, struct btrfs_ioctl_dev_info_args)
+#define TARGET_BTRFS_IOC_INO_PATHS TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 35, struct btrfs_ioctl_ino_path_args)
+#define TARGET_BTRFS_IOC_LOGICAL_INO TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 36, struct btrfs_ioctl_logical_ino_args)
#define TARGET_BTRFS_IOC_GET_DEV_STATS TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
52, struct btrfs_ioctl_get_dev_stats)
#define TARGET_BTRFS_IOC_GET_FEATURES TARGET_IOR(BTRFS_IOCTL_MAGIC, \
@@ -996,8 +1002,12 @@ struct target_rtc_pll_info {
57, struct btrfs_ioctl_feature_flags[2])
#define TARGET_BTRFS_IOC_GET_SUPPORTED_FEATURES TARGET_IOR(BTRFS_IOCTL_MAGIC, \
57, struct btrfs_ioctl_feature_flags[3])
+#define TARGET_BTRFS_IOC_LOGICAL_INO_V2 TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 59, struct btrfs_ioctl_logical_ino_args)
#define TARGET_BTRFS_IOC_GET_SUBVOL_INFO TARGET_IOR(BTRFS_IOCTL_MAGIC, \
60, struct btrfs_ioctl_get_subvol_info_args)
+#define TARGET_BTRFS_IOC_INO_LOOKUP_USER TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 62, struct btrfs_ioctl_ino_lookup_user_args)
/* usb ioctls */
#define TARGET_USBDEVFS_CONTROL TARGET_IOWRU('U', 0)
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index e26ab01e8f..980c29000a 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -349,6 +349,30 @@ STRUCT(btrfs_ioctl_get_subvol_info_args,
MK_STRUCT(STRUCT_btrfs_ioctl_timespec), /* rtime */
MK_ARRAY(TYPE_ULONGLONG, 8)) /* reserved */
+STRUCT(btrfs_ioctl_ino_lookup_args,
+ TYPE_ULONGLONG, /* treeid */
+ TYPE_ULONGLONG, /* objectid */
+ MK_ARRAY(TYPE_CHAR, BTRFS_INO_LOOKUP_PATH_MAX)) /* name */
+
+STRUCT(btrfs_ioctl_ino_path_args,
+ TYPE_ULONGLONG, /* inum */
+ TYPE_ULONGLONG, /* size */
+ TYPE_ULONGLONG, /* reserved */
+ TYPE_ULONGLONG) /* fspath */
+
+STRUCT(btrfs_ioctl_logical_ino_args,
+ TYPE_ULONGLONG, /* logical */
+ TYPE_ULONGLONG, /* size */
+ TYPE_ULONGLONG, /* reserved */
+ TYPE_ULONGLONG, /* flags */
+ TYPE_ULONGLONG) /* inodes */
+
+STRUCT(btrfs_ioctl_ino_lookup_user_args,
+ TYPE_ULONGLONG, /* dirid */
+ TYPE_ULONGLONG, /* treeid */
+ MK_ARRAY(TYPE_CHAR, BTRFS_VOL_NAME_MAX + 1), /* name */
+ MK_ARRAY(TYPE_CHAR, BTRFS_INO_LOOKUP_USER_PATH_MAX)) /* path */
+
STRUCT(btrfs_ioctl_dev_info_args,
TYPE_ULONGLONG, /* devid */
MK_ARRAY(TYPE_CHAR, BTRFS_UUID_SIZE), /* uuid */
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/4] linux-user: Add support for two btrfs ioctls used for subvolume
2020-07-17 14:04 [PATCH 0/4] Add support for a group of btrfs ioctls - 2 Filip Bozuta
2020-07-17 14:04 ` [PATCH 1/4] linux-user: Add support for a group of btrfs inode ioctls Filip Bozuta
@ 2020-07-17 14:04 ` Filip Bozuta
2020-07-17 14:04 ` [PATCH 3/4] linux-user: Add support for btrfs ioctls used to manage quota Filip Bozuta
2020-07-17 14:04 ` [PATCH 4/4] linux-user: Add support for btrfs ioctls used to scrub a filesystem Filip Bozuta
3 siblings, 0 replies; 5+ messages in thread
From: Filip Bozuta @ 2020-07-17 14:04 UTC (permalink / raw)
To: qemu-devel; +Cc: riku.voipio, laurent
This patch implements functionality for following ioctl:
BTRFS_IOC_DEFAULT_SUBVOL - Setting a default subvolume
Set a default subvolume for a btrfs filesystem. The third
ioctl's argument is a '__u64' (unsigned long long) which
represents the id of a subvolume that is to be set as
the default.
BTRFS_IOC_GET_SUBVOL_ROOTREF - Getting tree and directory id of subvolumes
Read tree and directory id of subvolumes from a btrfs
filesystem. The tree and directory id's are returned in the
ioctl's third argument which represents a pointer to a
following type:
struct btrfs_ioctl_get_subvol_rootref_args {
/* in/out, minimum id of rootref's treeid to be searched */
__u64 min_treeid;
/* out */
struct {
__u64 treeid;
__u64 dirid;
} rootref[BTRFS_MAX_ROOTREF_BUFFER_NUM];
/* out, number of found items */
__u8 num_items;
__u8 align[7];
};
Before calling this ioctl, 'min_treeid' field should be filled
with value that represent the minimum value for the tree id.
Implementation notes:
Ioctl BTRFS_IOC_GET_SUBVOL_ROOTREF uses the above mentioned structure
type as third argument. That is the reason why a aproppriate thunk
structure definition is added in file 'syscall_types.h'.
---
linux-user/ioctls.h | 7 +++++++
linux-user/syscall_defs.h | 4 ++++
linux-user/syscall_types.h | 11 +++++++++++
3 files changed, 22 insertions(+)
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index a7f5664487..2c553103e6 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -206,6 +206,9 @@
IOCTL(BTRFS_IOC_INO_LOOKUP, IOC_RW,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_ino_lookup_args)))
#endif
+#ifdef BTRFS_IOC_DEFAULT_SUBVOL
+ IOCTL(BTRFS_IOC_DEFAULT_SUBVOL, IOC_W, MK_PTR(TYPE_ULONGLONG))
+#endif
#ifdef BTRFS_IOC_SUBVOL_GETFLAGS
IOCTL(BTRFS_IOC_SUBVOL_GETFLAGS, IOC_R, MK_PTR(TYPE_ULONGLONG))
#endif
@@ -248,6 +251,10 @@
IOCTL(BTRFS_IOC_GET_SUBVOL_INFO, IOC_R,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_subvol_info_args)))
#endif
+#ifdef BTRFS_IOC_GET_SUBVOL_ROOTREF
+ IOCTL(BTRFS_IOC_GET_SUBVOL_ROOTREF, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_subvol_rootref_args)))
+#endif
#ifdef BTRFS_IOC_INO_LOOKUP_USER
IOCTL(BTRFS_IOC_INO_LOOKUP_USER, IOC_RW,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_ino_lookup_user_args)))
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 7bb105428b..f4b4fc4a20 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -984,6 +984,8 @@ struct target_rtc_pll_info {
15, struct btrfs_ioctl_vol_args)
#define TARGET_BTRFS_IOC_INO_LOOKUP TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
18, struct btrfs_ioctl_ino_lookup_args)
+#define TARGET_BTRFS_IOC_DEFAULT_SUBVOL TARGET_IOW(BTRFS_IOCTL_MAGIC, \
+ 19, abi_ullong)
#define TARGET_BTRFS_IOC_SUBVOL_GETFLAGS TARGET_IOR(BTRFS_IOCTL_MAGIC, \
25, abi_ullong)
#define TARGET_BTRFS_IOC_SUBVOL_SETFLAGS TARGET_IOW(BTRFS_IOCTL_MAGIC, \
@@ -1006,6 +1008,8 @@ struct target_rtc_pll_info {
59, struct btrfs_ioctl_logical_ino_args)
#define TARGET_BTRFS_IOC_GET_SUBVOL_INFO TARGET_IOR(BTRFS_IOCTL_MAGIC, \
60, struct btrfs_ioctl_get_subvol_info_args)
+#define TARGET_BTRFS_IOC_GET_SUBVOL_ROOTREF TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 61, struct btrfs_ioctl_get_subvol_rootref_args)
#define TARGET_BTRFS_IOC_INO_LOOKUP_USER TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
62, struct btrfs_ioctl_ino_lookup_user_args)
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index 980c29000a..d2f1b30ff3 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -381,6 +381,17 @@ STRUCT(btrfs_ioctl_dev_info_args,
MK_ARRAY(TYPE_ULONGLONG, 379), /* unused */
MK_ARRAY(TYPE_CHAR, BTRFS_DEVICE_PATH_NAME_MAX)) /* path */
+STRUCT(rootref,
+ TYPE_ULONGLONG, /* treeid */
+ TYPE_ULONGLONG) /* dirid */
+
+STRUCT(btrfs_ioctl_get_subvol_rootref_args,
+ TYPE_ULONGLONG, /* min_treeid */
+ MK_ARRAY(MK_STRUCT(STRUCT_rootref),
+ BTRFS_MAX_ROOTREF_BUFFER_NUM), /* rootref */
+ TYPE_CHAR, /* num_items */
+ MK_ARRAY(TYPE_CHAR, 7)) /* align */
+
STRUCT(btrfs_ioctl_get_dev_stats,
TYPE_ULONGLONG, /* devid */
TYPE_ULONGLONG, /* nr_items */
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 3/4] linux-user: Add support for btrfs ioctls used to manage quota
2020-07-17 14:04 [PATCH 0/4] Add support for a group of btrfs ioctls - 2 Filip Bozuta
2020-07-17 14:04 ` [PATCH 1/4] linux-user: Add support for a group of btrfs inode ioctls Filip Bozuta
2020-07-17 14:04 ` [PATCH 2/4] linux-user: Add support for two btrfs ioctls used for subvolume Filip Bozuta
@ 2020-07-17 14:04 ` Filip Bozuta
2020-07-17 14:04 ` [PATCH 4/4] linux-user: Add support for btrfs ioctls used to scrub a filesystem Filip Bozuta
3 siblings, 0 replies; 5+ messages in thread
From: Filip Bozuta @ 2020-07-17 14:04 UTC (permalink / raw)
To: qemu-devel; +Cc: riku.voipio, laurent
This patch implements functionality for following ioctls:
BTRFS_IOC_QUOTA_CTL - Enabling/Disabling quota support
Enable or disable quota support for a btrfs filesystem. Quota
support is enabled or disabled using the ioctls third argument
which represents a pointer to a following type:
struct btrfs_ioctl_quota_ctl_args {
__u64 cmd;
__u64 status;
};
Before calling this ioctl, the 'cmd' field should be filled
with one of the values 'BTRFS_QUOTA_CTL_ENABLE' (enabling quota)
'BTRFS_QUOTA_CTL_DISABLE' (disabling quota).
BTRFS_IOC_QGROUP_CREATE - Creating/Removing a subvolume quota group
Create or remove a subvolume quota group. The subvolume quota
group is created or removed using the ioctl's third argument which
represents a pointer to a following type:
struct btrfs_ioctl_qgroup_create_args {
__u64 create;
__u64 qgroupid;
};
Before calling this ioctl, the 'create' field should be filled
with the aproppriate value depending on if the user wants to
create or remove a quota group (0 for removing, everything else
for creating). Also, the 'qgroupid' field should be filled with
the value for the quota group id that is to be created.
BTRFS_IOC_QGROUP_ASSIGN - Asigning or removing a quota group as child group
Asign or remove a quota group as child quota group of another
group in the btrfs filesystem. The asignment is done using the
ioctl's third argument which represents a pointert to a following type:
struct btrfs_ioctl_qgroup_assign_args {
__u64 assign;
__u64 src;
__u64 dst;
};
Before calling this ioctl, the 'assign' field should be filled with
the aproppriate value depending on if the user wants to asign or remove
a quota group as a child quota group of another group (0 for removing,
everythin else for asigning). Also, the 'src' and 'dst' fields should
be filled with the aproppriate quota group id values depending on which
quota group needs to asigned or removed as child quota group of another
group ('src' gets asigned or removed as child group of 'dst').
BTRFS_IOC_QGROUP_LIMIT - Limiting the size of a quota group
Limit the size of a quota group. The size of the quota group is limited
with the ioctls third argument which represents a pointer to a following
type:
struct btrfs_ioctl_qgroup_limit_args {
__u64 qgroupid;
struct btrfs_qgroup_limit lim;
};
Before calling this ioctl, the 'qgroup' id field should be filled with
aproppriate value of the quota group id for which the size is to be
limited. The second field is of following type:
struct btrfs_qgroup_limit {
__u64 flags;
__u64 max_rfer;
__u64 max_excl;
__u64 rsv_rfer;
__u64 rsv_excl;
};
The 'max_rfer' field should be filled with the size to which the quota
group should be limited. The 'flags' field can be used for passing
additional options and can have values which can be found on:
https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/btrfs.h#L67
BTRFS_IOC_QUOTA_RESCAN_STATUS - Checking status of running rescan operation
Check status of a running rescan operation. The status is checked using
the ioctl's third argument which represents a pointer to a following type:
struct btrfs_ioctl_quota_rescan_args {
__u64 flags;
__u64 progress;
__u64 reserved[6];
};
If there is a rescan operation running, 'flags' field is set to 1, and
'progress' field is set to aproppriate value which represents the progress
of the operation.
BTRFS_IOC_QUOTA_RESCAN - Starting a rescan operation
Start ar rescan operation to Trash all quota groups and scan the metadata
again with the current config. Before calling this ioctl,
BTRFS_IOC_QUOTA_RESCAN_STATUS sould be run to check if there is already a
rescan operation runing. After that ioctl call, the received
'struct btrfs_ioctl_quota_rescan_args' should be than passed as this ioctls
third argument.
BTRFS_IOC_QUOTA_RESCAN_WAIT - Waiting for a rescan operation to finish
Wait until a rescan operation is finished (if there is a rescan operation
running). The third ioctls argument is ignored.
Implementation notes:
Almost all of the ioctls in this patch use structure types as third arguments.
That is the reason why aproppriate thunk definitions were added in file
'syscall_types.h'.
---
linux-user/ioctls.h | 27 +++++++++++++++++++++++++++
linux-user/syscall_defs.h | 14 ++++++++++++++
linux-user/syscall_types.h | 29 +++++++++++++++++++++++++++++
3 files changed, 70 insertions(+)
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 2c553103e6..8665f504bf 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -227,6 +227,33 @@
IOCTL(BTRFS_IOC_LOGICAL_INO, IOC_RW,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_logical_ino_args)))
#endif
+#ifdef BTRFS_IOC_QUOTA_CTL
+ IOCTL(BTRFS_IOC_QUOTA_CTL, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_quota_ctl_args)))
+#endif
+#ifdef BTRFS_IOC_QGROUP_ASSIGN
+ IOCTL(BTRFS_IOC_QGROUP_ASSIGN, IOC_W,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_qgroup_assign_args)))
+#endif
+#ifdef BTRFS_IOC_QGROUP_CREATE
+ IOCTL(BTRFS_IOC_QGROUP_CREATE, IOC_W,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_qgroup_create_args)))
+#endif
+#ifdef BTRFS_IOC_QGROUP_LIMIT
+ IOCTL(BTRFS_IOC_QGROUP_LIMIT, IOC_R,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_qgroup_limit_args)))
+#endif
+#ifdef BTRFS_IOC_QUOTA_RESCAN
+ IOCTL(BTRFS_IOC_QUOTA_RESCAN, IOC_W,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_quota_rescan_args)))
+#endif
+#ifdef BTRFS_IOC_QUOTA_RESCAN_STATUS
+ IOCTL(BTRFS_IOC_QUOTA_RESCAN_STATUS, IOC_R,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_quota_rescan_args)))
+#endif
+#ifdef BTRFS_IOC_QUOTA_RESCAN_WAIT
+ IOCTL(BTRFS_IOC_QUOTA_RESCAN_WAIT, 0, TYPE_NULL)
+#endif
#ifdef BTRFS_IOC_GET_DEV_STATS
IOCTL(BTRFS_IOC_GET_DEV_STATS, IOC_RW,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_get_dev_stats)))
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index f4b4fc4a20..3f771ae5d1 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -996,6 +996,20 @@ struct target_rtc_pll_info {
35, struct btrfs_ioctl_ino_path_args)
#define TARGET_BTRFS_IOC_LOGICAL_INO TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
36, struct btrfs_ioctl_logical_ino_args)
+#define TARGET_BTRFS_IOC_QUOTA_CTL TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 40, struct btrfs_ioctl_quota_ctl_args)
+#define TARGET_BTRFS_IOC_QGROUP_ASSIGN TARGET_IOW(BTRFS_IOCTL_MAGIC, \
+ 41, struct btrfs_ioctl_qgroup_assign_args)
+#define TARGET_BTRFS_IOC_QGROUP_CREATE TARGET_IOW(BTRFS_IOCTL_MAGIC, \
+ 42, struct btrfs_ioctl_qgroup_create_args)
+#define TARGET_BTRFS_IOC_QGROUP_LIMIT TARGET_IOR(BTRFS_IOCTL_MAGIC, \
+ 43, struct btrfs_ioctl_qgroup_limit_args)
+#define TARGET_BTRFS_IOC_QUOTA_RESCAN TARGET_IOW(BTRFS_IOCTL_MAGIC, \
+ 44, struct btrfs_ioctl_quota_rescan_args)
+#define TARGET_BTRFS_IOC_QUOTA_RESCAN_STATUS TARGET_IOR(BTRFS_IOCTL_MAGIC, \
+ 45, struct btrfs_ioctl_quota_rescan_args)
+#define TARGET_BTRFS_IOC_QUOTA_RESCAN_WAIT TARGET_IO(BTRFS_IOCTL_MAGIC, \
+ 46)
#define TARGET_BTRFS_IOC_GET_DEV_STATS TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
52, struct btrfs_ioctl_get_dev_stats)
#define TARGET_BTRFS_IOC_GET_FEATURES TARGET_IOR(BTRFS_IOCTL_MAGIC, \
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index d2f1b30ff3..b4f462b5c6 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -400,6 +400,35 @@ STRUCT(btrfs_ioctl_get_dev_stats,
MK_ARRAY(TYPE_ULONGLONG,
128 - 2 - BTRFS_DEV_STAT_VALUES_MAX)) /* unused */
+STRUCT(btrfs_ioctl_quota_ctl_args,
+ TYPE_ULONGLONG, /* cmd */
+ TYPE_ULONGLONG) /* status */
+
+STRUCT(btrfs_ioctl_quota_rescan_args,
+ TYPE_ULONGLONG, /* flags */
+ TYPE_ULONGLONG, /* progress */
+ MK_ARRAY(TYPE_ULONGLONG, 6)) /* reserved */
+
+STRUCT(btrfs_ioctl_qgroup_assign_args,
+ TYPE_ULONGLONG, /* assign */
+ TYPE_ULONGLONG, /* src */
+ TYPE_ULONGLONG) /* dst */
+
+STRUCT(btrfs_ioctl_qgroup_create_args,
+ TYPE_ULONGLONG, /* create */
+ TYPE_ULONGLONG) /* qgroupid */
+
+STRUCT(btrfs_qgroup_limit,
+ TYPE_ULONGLONG, /* flags */
+ TYPE_ULONGLONG, /* max_rfer */
+ TYPE_ULONGLONG, /* max_excl */
+ TYPE_ULONGLONG, /* rsv_rfer */
+ TYPE_ULONGLONG) /* rsv_excl */
+
+STRUCT(btrfs_ioctl_qgroup_limit_args,
+ TYPE_ULONGLONG, /* qgroupid */
+ MK_STRUCT(STRUCT_btrfs_qgroup_limit)) /* lim */
+
STRUCT(btrfs_ioctl_feature_flags,
TYPE_ULONGLONG, /* compat_flags */
TYPE_ULONGLONG, /* compat_ro_flags */
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 4/4] linux-user: Add support for btrfs ioctls used to scrub a filesystem
2020-07-17 14:04 [PATCH 0/4] Add support for a group of btrfs ioctls - 2 Filip Bozuta
` (2 preceding siblings ...)
2020-07-17 14:04 ` [PATCH 3/4] linux-user: Add support for btrfs ioctls used to manage quota Filip Bozuta
@ 2020-07-17 14:04 ` Filip Bozuta
3 siblings, 0 replies; 5+ messages in thread
From: Filip Bozuta @ 2020-07-17 14:04 UTC (permalink / raw)
To: qemu-devel; +Cc: riku.voipio, laurent
This patch implements functionality for following ioctls:
BTRFS_IOC_SCRUB - Starting a btrfs filesystem scrub
Start a btrfs filesystem scrub. The third ioctls argument
is a pointer to a following type:
struct btrfs_ioctl_scrub_args {
__u64 devid; /* in */
__u64 start; /* in */
__u64 end; /* in */
__u64 flags; /* in */
struct btrfs_scrub_progress progress; /* out */
/* pad to 1k */
__u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
};
Before calling this ioctl, field 'devid' should be filled
with value that represents the device id of the btrfs filesystem
for which the scrub is to be started.
BTRFS_IOC_SCRUB_CANCEL - Canceling scrub of a btrfs filesystem
Cancel a btrfs filesystem scrub if it is running. The third
ioctls argument is ignored.
BTRFS_IOC_SCRUB_PROGRESS - Getting status of a running scrub
Read the status of a running btrfs filesystem scrub. The third
ioctls argument is a pointer to the above mentioned
'struct btrfs_ioctl_scrub_args'. Similarly as with 'BTRFS_IOC_SCRUB',
the 'devid' field should be filled with value that represents the
id of the btrfs device for which the scrub has started. The status
of a running scrub is returned in the field 'progress' which is
of type 'struct btrfs_scrub_progress' and its definition can be
found at:
https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/btrfs.h#L150
Implementation nots:
Ioctls in this patch use type 'struct btrfs_ioctl_scrub_args' as their
third argument. That is the reason why an aproppriate thunk type
definition is added in file 'syscall_types.h'.
---
linux-user/ioctls.h | 11 +++++++++++
linux-user/syscall_defs.h | 6 ++++++
linux-user/syscall_types.h | 26 ++++++++++++++++++++++++++
3 files changed, 43 insertions(+)
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 8665f504bf..bf80615438 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -215,6 +215,17 @@
#ifdef BTRFS_IOC_SUBVOL_SETFLAGS
IOCTL(BTRFS_IOC_SUBVOL_SETFLAGS, IOC_W, MK_PTR(TYPE_ULONGLONG))
#endif
+#ifdef BTRFS_IOC_SCRUB
+ IOCTL(BTRFS_IOC_SCRUB, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_scrub_args)))
+#endif
+#ifdef BTRFS_IOC_SCRUB_CANCEL
+ IOCTL(BTRFS_IOC_SCRUB_CANCEL, 0, TYPE_NULL)
+#endif
+#ifdef BTRFS_IOC_SCRUB_PROGRESS
+ IOCTL(BTRFS_IOC_SCRUB_PROGRESS, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_scrub_args)))
+#endif
#ifdef BTRFS_IOC_DEV_INFO
IOCTL(BTRFS_IOC_DEV_INFO, IOC_RW,
MK_PTR(MK_STRUCT(STRUCT_btrfs_ioctl_dev_info_args)))
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 3f771ae5d1..589ec3e9b0 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -990,6 +990,12 @@ struct target_rtc_pll_info {
25, abi_ullong)
#define TARGET_BTRFS_IOC_SUBVOL_SETFLAGS TARGET_IOW(BTRFS_IOCTL_MAGIC, \
26, abi_ullong)
+#define TARGET_BTRFS_IOC_SCRUB TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 27, struct btrfs_ioctl_scrub_args)
+#define TARGET_BTRFS_IOC_SCRUB_CANCEL TARGET_IO(BTRFS_IOCTL_MAGIC, \
+ 28)
+#define TARGET_BTRFS_IOC_SCRUB_PROGRESS TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
+ 29, struct btrfs_ioctl_scrub_args)
#define TARGET_BTRFS_IOC_DEV_INFO TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
30, struct btrfs_ioctl_dev_info_args)
#define TARGET_BTRFS_IOC_INO_PATHS TARGET_IOWR(BTRFS_IOCTL_MAGIC,\
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index b4f462b5c6..345193270c 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -373,6 +373,32 @@ STRUCT(btrfs_ioctl_ino_lookup_user_args,
MK_ARRAY(TYPE_CHAR, BTRFS_VOL_NAME_MAX + 1), /* name */
MK_ARRAY(TYPE_CHAR, BTRFS_INO_LOOKUP_USER_PATH_MAX)) /* path */
+STRUCT(btrfs_scrub_progress,
+ TYPE_ULONGLONG, /* data_extents_scrubbed */
+ TYPE_ULONGLONG, /* tree_extents_scrubbed */
+ TYPE_ULONGLONG, /* data_bytes_scrubbed */
+ TYPE_ULONGLONG, /* tree_bytes_scrubbed */
+ TYPE_ULONGLONG, /* read_errors */
+ TYPE_ULONGLONG, /* csum_errors */
+ TYPE_ULONGLONG, /* verify_errors */
+ TYPE_ULONGLONG, /* no_csum */
+ TYPE_ULONGLONG, /* csum_discards */
+ TYPE_ULONGLONG, /* super_errors */
+ TYPE_ULONGLONG, /* malloc_errors */
+ TYPE_ULONGLONG, /* uncorrectable_errors */
+ TYPE_ULONGLONG, /* corrected_er */
+ TYPE_ULONGLONG, /* last_physical */
+ TYPE_ULONGLONG) /* unverified_errors */
+
+STRUCT(btrfs_ioctl_scrub_args,
+ TYPE_ULONGLONG, /* devid */
+ TYPE_ULONGLONG, /* start */
+ TYPE_ULONGLONG, /* end */
+ TYPE_ULONGLONG, /* flags */
+ MK_STRUCT(STRUCT_btrfs_scrub_progress), /* progress */
+ MK_ARRAY(TYPE_ULONGLONG,
+ (1024 - 32 - sizeof(struct btrfs_scrub_progress)) / 8)) /* unused */
+
STRUCT(btrfs_ioctl_dev_info_args,
TYPE_ULONGLONG, /* devid */
MK_ARRAY(TYPE_CHAR, BTRFS_UUID_SIZE), /* uuid */
--
2.25.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-07-17 14:21 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2020-07-17 14:04 [PATCH 0/4] Add support for a group of btrfs ioctls - 2 Filip Bozuta
2020-07-17 14:04 ` [PATCH 1/4] linux-user: Add support for a group of btrfs inode ioctls Filip Bozuta
2020-07-17 14:04 ` [PATCH 2/4] linux-user: Add support for two btrfs ioctls used for subvolume Filip Bozuta
2020-07-17 14:04 ` [PATCH 3/4] linux-user: Add support for btrfs ioctls used to manage quota Filip Bozuta
2020-07-17 14:04 ` [PATCH 4/4] linux-user: Add support for btrfs ioctls used to scrub a filesystem Filip Bozuta
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