From: Laurent Vivier <laurent@vivier.eu>
To: qemu-devel@nongnu.org
Cc: Laurent Vivier <laurent@vivier.eu>,
Filip Bozuta <Filip.Bozuta@syrmia.com>
Subject: [PULL 10/14] linux-user: Add support for a group of btrfs inode ioctls
Date: Thu, 13 Aug 2020 08:49:19 +0200 [thread overview]
Message-ID: <20200813064923.263565-11-laurent@vivier.eu> (raw)
In-Reply-To: <20200813064923.263565-1-laurent@vivier.eu>
From: Filip Bozuta <Filip.Bozuta@syrmia.com>
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'.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200803094629.21898-6-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
linux-user/ioctls.h | 20 ++++++++++++++++++++
linux-user/syscall_defs.h | 5 +++++
linux-user/syscall_types.h | 24 ++++++++++++++++++++++++
3 files changed, 49 insertions(+)
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 50fae1e33bc4..169f98f7a301 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 6cc3c1f6f5ba..48ebf56d0f36 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -980,16 +980,21 @@ struct target_rtc_pll_info {
#define TARGET_BTRFS_IOC_RM_DEV TARGET_IOWU(BTRFS_IOCTL_MAGIC, 11)
#define TARGET_BTRFS_IOC_SUBVOL_CREATE TARGET_IOWU(BTRFS_IOCTL_MAGIC, 14)
#define TARGET_BTRFS_IOC_SNAP_DESTROY TARGET_IOWU(BTRFS_IOCTL_MAGIC, 15)
+#define TARGET_BTRFS_IOC_INO_LOOKUP TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 18)
#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_IOWRU(BTRFS_IOCTL_MAGIC, 30)
+#define TARGET_BTRFS_IOC_INO_PATHS TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 35)
+#define TARGET_BTRFS_IOC_LOGICAL_INO TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 36)
#define TARGET_BTRFS_IOC_GET_DEV_STATS TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 52)
#define TARGET_BTRFS_IOC_GET_FEATURES TARGET_IORU(BTRFS_IOCTL_MAGIC, 57)
#define TARGET_BTRFS_IOC_SET_FEATURES TARGET_IOWU(BTRFS_IOCTL_MAGIC, 57)
#define TARGET_BTRFS_IOC_GET_SUPPORTED_FEATURES TARGET_IORU(BTRFS_IOCTL_MAGIC, 57)
+#define TARGET_BTRFS_IOC_LOGICAL_INO_V2 TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 59)
#define TARGET_BTRFS_IOC_GET_SUBVOL_INFO TARGET_IORU(BTRFS_IOCTL_MAGIC, 60)
+#define TARGET_BTRFS_IOC_INO_LOOKUP_USER TARGET_IOWRU(BTRFS_IOCTL_MAGIC, 62)
/* 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 808f4daaf72e..6e64e6c4f57c 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -382,6 +382,30 @@ 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 */
+ MK_ARRAY(TYPE_ULONGLONG, 4), /* reserved */
+ TYPE_ULONGLONG) /* fspath */
+
+STRUCT(btrfs_ioctl_logical_ino_args,
+ TYPE_ULONGLONG, /* logical */
+ TYPE_ULONGLONG, /* size */
+ MK_ARRAY(TYPE_ULONGLONG, 3), /* 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 */
--
2.26.2
next prev parent reply other threads:[~2020-08-13 6:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-13 6:49 [PULL 00/14] Linux user for 5.2 patches Laurent Vivier
2020-08-13 6:49 ` [PULL 01/14] linux-user: Fix "print_fdset()" in "strace.c" to not print ", " after last value Laurent Vivier
2020-08-13 6:49 ` [PULL 02/14] linux-user: Validate mmap/mprotect prot value Laurent Vivier
2020-08-13 6:49 ` [PULL 03/14] linux-user: Adjust guest page protection for the host Laurent Vivier
2020-08-13 6:49 ` [PULL 04/14] linux-user: Modify 'target_to_host/host_to_target_itimerspec()' Laurent Vivier
2020-08-13 6:49 ` [PULL 05/14] linux-user: Add support for a group of 2038 safe syscalls Laurent Vivier
2020-08-13 6:49 ` [PULL 06/14] linux-user: Add support for a group of btrfs ioctls used for subvolumes Laurent Vivier
2020-08-13 6:49 ` [PULL 07/14] linux-user: Add support for a group of btrfs ioctls used for snapshots Laurent Vivier
2020-08-13 6:49 ` [PULL 08/14] linux-user: Add support for btrfs ioctls used to manipulate with devices Laurent Vivier
2020-08-13 6:49 ` [PULL 09/14] linux-user: Add support for btrfs ioctls used to get/set features Laurent Vivier
2020-08-13 6:49 ` Laurent Vivier [this message]
2020-08-13 6:49 ` [PULL 11/14] linux-user: Add support for two btrfs ioctls used for subvolume Laurent Vivier
2020-08-13 6:49 ` [PULL 12/14] linux-user: Add support for btrfs ioctls used to manage quota Laurent Vivier
2020-08-13 6:49 ` [PULL 13/14] linux-user: Add support for btrfs ioctls used to scrub a filesystem Laurent Vivier
2020-08-13 6:49 ` [PULL 14/14] linux-user: Fix 'utimensat()' implementation Laurent Vivier
2020-08-21 16:23 ` [PULL 00/14] Linux user for 5.2 patches Peter Maydell
2020-08-21 18:45 ` Laurent Vivier
2020-08-21 19:12 ` Filip Bozuta
2020-08-21 19:08 ` Laurent Vivier
2020-08-23 8:21 ` Laurent Vivier
2020-08-23 13:28 ` Laurent Vivier
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