Move the values into the per-target target_mman.h headers
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230707204054.8792-8-richard.henderson@linaro.org>
Move the values into the per-target target_mman.h headers
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230707204054.8792-7-richard.henderson@linaro.org>
Be careful not to change linux_dirent64, which is a host structure.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Be careful not to change linux_dirent64, which is a host structure.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
These definitions are in sparc/signal.c.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Untabify and re-indent.
We had a mix of 2, 3, 4, and 8 space indentation.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The 64-bit SPARC V9 syscall ABI uses 32-bit UIDs. Only enable
the 16-bit UID wrappers for 32-bit SPARC (V7 and V8).
Possibly missed in commit 992f48a036 ("Support for 32 bit
ABI on 64 bit targets (only enabled Sparc64)").
Reported-by: Gregor Riepl <onitake@gmail.com>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: Zach van Rijn <me@zv.io>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1394
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230327131910.78564-1-philmd@linaro.org>
This trap is raised by taddcctv and tsubcctv insns.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-16-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Previously the 32-bit version was incorrectly chosen, leading to funny
but incorrect output from e.g. df(1). Simply select the version
corresponding to the 64-bit asm-generic definition.
For reference, this program should produce the same output no matter
natively compiled or not, for loongarch64 or not:
```c
#include <stdio.h>
#include <sys/statfs.h>
int main(int argc, const char *argv[])
{
struct statfs b;
if (statfs(argv[0], &b))
return 1;
printf("f_type = 0x%lx\n", b.f_type);
printf("f_bsize = %ld\n", b.f_bsize);
printf("f_blocks = %ld\n", b.f_blocks);
printf("f_bfree = %ld\n", b.f_bfree);
printf("f_bavail = %ld\n", b.f_bavail);
return 0;
}
// Example output on my amd64 box, with the test binary residing on a
// btrfs partition.
// Native and emulated output after the fix:
//
// f_type = 0x9123683e
// f_bsize = 4096
// f_blocks = 268435456
// f_bfree = 168406890
// f_bavail = 168355058
// Output before the fix, note the messed layout:
//
// f_type = 0x10009123683e
// f_bsize = 723302085239504896
// f_blocks = 168355058
// f_bfree = 2250817541779750912
// f_bavail = 1099229433104
```
Fixes: 1f63019632 ("linux-user: Add LoongArch syscall support")
Signed-off-by: WANG Xuerui <xen0n@gentoo.org>
Cc: Song Gao <gaosong@loongson.cn>
Cc: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Cc: Andreas K. Hüttel <dilfridge@gentoo.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Andreas K. Huettel <dilfridge@gentoo.org>
Message-Id: <20221006100710.427252-1-xen0n@gentoo.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
The xtensa platform has a value of 0x10 for PROT_SEM.
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220924114501.21767-2-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220624031049.1716097-5-gaosong@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
It's likely broken, and nobody cared for picking it up again
during the deprecation phase, so let's remove this now.
Since this is the last entry in deprecated_targets_list, remove
the related code in the configure script, too.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20211215084958.185214-1-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220112112722.3641051-32-alex.bennee@linaro.org>
Alpha uses different values of some TARGET_RLIMIT_* constants, which were
missing and caused bugs like #577, fixed thus. Also rearranged all three
(alpha, mips and sparc) that differ from everyone else for clarity.
Signed-off-by: Serge Belyshev <belyshev@depni.sinp.msu.ru>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/577
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <87y236lpwb.fsf@depni.sinp.msu.ru>
[lv: replace tabs by spaces]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This si_code was changed in 75abf64287cab, for linux 4.17.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220107213243.212806-9-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This define is unused, and we have no similar define for
the other signal sub-codes.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220107213243.212806-8-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
These si_codes were changed in 535906c684fca, for linux 4.17.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220107213243.212806-2-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
There seems to be difference in syscall and libc definition of these
methods and therefore musl does not implement them (1e21e78bf7). Call
syscall directly to ensure the behavior of the libc of user application,
not the libc that was used to build QEMU.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Message-Id: <20220105041819.24160-3-tonistiigi@gmail.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
These syscalls are not exposed by glibc. The struct type need to be
redefined as it can't be included directly before
https://lkml.org/lkml/2020/5/28/810 .
sched_attr type can grow in future kernel versions. When client sends
values that QEMU does not understand it will return E2BIG with same
semantics as old kernel would so client can retry with smaller inputs.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Message-Id: <20220105041819.24160-2-tonistiigi@gmail.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Linux Hexagon port doesn't define a specific 'struct stat'
but uses the generic one (see Linux commit 6103ec56c65c [*]
"asm-generic: add generic ABI headers" which predates the
introduction of the Hexagon port).
Remove the target specific target_stat (which in fact is the
target_stat64 structure but uses incorrect target_long and
ABI unsafe long long types) and use the generic target_stat64
instead.
[*] https://github.com/torvalds/linux/commit/6103ec56c65c3#diff-5f59b07b38273b7d6a74193bc81a8cd18928c688276eae20cb10c569de3253ee
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Tested-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20211116210919.2823206-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
LOOP_CONFIGURE is now used by losetup, and it cannot cope with ENOSYS.
Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <mvmtug4mbfx.fsf_-_@suse.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The host uint64_t (etc) does not have the correct
alignment constraint as the guest: use abi_* types.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211114103539.298686-4-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
We currently use a flexible array member for target_dirent,
but use incorrectly fixed length arrays for target_dirent64,
linux_dirent and linux_dirent64.
This requires that we adjust the definition of the VFAT READDIR
ioctls which hard-code the 256 namelen size into the ioctl constant.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211114103539.298686-3-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
We want to access the target errno indepently of the rest of the
linux-user code. Move the header containing the generic errno
definitions ('errno_defs.h') to 'generic/target_errno_defs.h',
create a new 'target_errno_defs.h' in each target which itself
includes 'generic/target_errno_defs.h'.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210708170550.1846343-4-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
There's no longer a difference between the alpha code and
the generic code.
There is a type difference in target_old_sigaction.sa_flags,
which can be resolved with a very much smaller ifdef, which
allows us to finish sharing the target_sigaction definition.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210422230227.314751-7-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This means that we can share the TARGET_NR_rt_sigaction code,
and the target_rt_sigaction structure is unused. Untangling
the ifdefs so that target_sigaction can be shared will wait
until the next patch.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210422230227.314751-6-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The value of ka_restorer needs to be saved in sigact_table.
At the moment, the attempt to save it in do_syscall is
improperly clobbering user memory.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210422230227.314751-4-richard.henderson@linaro.org>
[lv: remove tab]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Use ka_restorer, in line with TARGET_ARCH_HAS_KA_RESTORER
vs TARGET_ARCH_HAS_SA_RESTORER, since Alpha passes this
field as a syscall argument.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210422230227.314751-3-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
TILE-Gx was only implemented in linux-user mode, but support for this CPU
was removed from the upstream Linux kernel in 2018, and it has also been
dropped from glibc, so there is no new Linux development taking place with
this architecture. For running the old binaries, users can simply use older
versions of QEMU.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210224183952.80463-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Implementation of Linux user emulation for Hexagon
Some common files modified in addition to new files in linux-user/hexagon
Acked-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1612763186-18161-31-git-send-email-tsimpson@quicinc.com>
[rth: Fix termbits.h on review by Laurent]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Remember the PROT_MTE bit as PAGE_MTE/PAGE_TARGET_2.
Otherwise this does not yet have effect.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-25-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Also reorder blocks so that they are all in the same order everywhere.
Signed-off-by: Shu-Chun Weng <scw@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20201218193213.3566856-2-scw@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The three options handling `struct sock_fprog` (TUNATTACHFILTER,
TUNDETACHFILTER, and TUNGETFILTER) are not implemented. Linux kernel
keeps a user space pointer in them which we cannot correctly handle.
Signed-off-by: Josh Kunz <jkz@google.com>
Signed-off-by: Shu-Chun Weng <scw@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200929014801.655524-1-scw@google.com>
[lv: use 0 size in unlock_user()]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This check can be done in a much shorter way in meson.build. And while
we're at it, rename the #define to HAVE_BTRFS_H to match the other
HAVE_someheader_H symbols that we already have.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201118171052.308191-7-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Transform the prot bit to a qemu internal page bit, and save
it in the page tables.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201021173749.111103-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Target definitions of btrfs ioctls in 'syscall_defs.h' use
the value BTRFS_IOCTL_MAGIC that is defined header 'btrfs.h'.
This header is not available in kernel versions before 3.9.
For that reason, these target ioctl definitions should be
enwrapped in an #ifdef directive to check whether the 'btrfs.h'
header is available as to not cause build errors on older
Linux systems.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200905163802.2666-1-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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'.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Tested-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200823195014.116226-9-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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'.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Tested-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200823195014.116226-8-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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'.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
Tested-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200823195014.116226-7-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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>
Tested-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200823195014.116226-6-Filip.Bozuta@syrmia.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
