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Add parsing functions for each type of nodes, which will be used for
checking the validity of raw node data while reading from TNC or
scanning from UBIFS logical erase block.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Load filesystem information from UBI volume (Similar to UBIFS mounting
process), initialize kinds of buffers and read superblock. This is the
base step for both fsck and rebuild_fs. Subsequent pacthes will complete
this step by adding more steps(eg. read master, replay journal, etc.)
which are only used in fsck.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Read failure caused by scanning corrupted data or invalid data members
should be identified, because fsck can handle it. Updating lp failure
caused by bad space statistics should be identified too, because fsck
can handle it.
Add eight callback functions to implement it for fsck:
1. set_failure_reason_callback: Record failure reasons when reading or
parsing node failed, there are four reasons:
a. FR_DATA_CORRUPTED: scanning corrupted data or invalid nodes found
b. FR_TNC_CORRUPTED: invalid index nodes
c. FR_LPT_CORRUPTED: invalid pnode/nnode
d. FR_LPT_INCORRECT: invalid space statistics or invalid LEB properties
2. get_failure_reason_callback: get failure reasons
3. clear_failure_reason_callback: Clear the error which is caused by
above reasons.
4. test_and_clear_failure_reason_callback: Check and clear the error
which is caused by above reasons, if so, fsck will handle it
according to specific situation.
For example, fsck will drop data node rather than fails to return
when reading failure is caused by DATA_CORRUPTED.
For another example, journal replaying will continue rather than
fails to return if updating lpt failure is caused by LPT_CORRUPTED.
5. set_lpt_invalid_callback: Set the invalid lpt status
6. test_lpt_valid_callback: Check whether the lpt is corrupted/incorrect,
it should be invoked before updating lp, if lpt status is invalid,
returns false (which means that caller should skip updating lp, because
updating lp could trigger assertion failed in ubifs_change_lp).
7. can_ignore_failure_callback: Check whether the failure can be
ignored, some inconsistent errors won't affect the fsck process,
for example wrong space statistics can be fixed after traversing
TNC, so failures caused by incorrect space statistics can be ignored.
8. handle_failure_callback: Check whether the failure can be handled,
some inconsistent errors could be fixed by fsck, we have fix_problem
to do that, but UBIFS needs a callback function to invoke it in common
libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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There are four dimensions to define the type of inconsistent problems:
1. fixable: Some inconsistent problems can't be fixed, for example
corrupted superblock. Un-fixable problem will abort program.
2. must fix: Some inconsistent problems can be ignored(eg. incorrect
isize), but some are not(eg. corrupted TNC), which will affect the
subsequent fsck steps.
3. drop data: Some fixing methods will drop user data, which is
unacceptable for safe mode. If it happens, fsck will be aborted.
4. need rebuild: Some inconsistent problems depends on rebuilding
filesystem to be fixed(eg. corrupted master node, corrupted TNC).
Define an asking function to handle above kinds of inconsistent problems.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add basic process code for fsck.ubifs. There are following modes for fsck:
1. normal mode: Check the filesystem, ask user whether or not to fix
the problem as long as inconsistent data is found during fs checking.
2. safe mode: Check and safely repair the filesystem, if there are any
data dropping operations needed by fixing, fsck will fail.
3. danger mode: Answer 'yes' to all questions. There two sub modes:
a) Check and repair the filesystem according to TNC, data dropping
will be reported. If TNC/master/log is corrupted, fsck will fail.
b) Check and forcedly repair the filesystem according to TNC, turns
to rebuild filesystem if TNC/master/log is corrupted. Always make
fsck succeed.
4. check mode: Make no changes to the filesystem, only check the
filesystem.
5. rebuild mode: Scan entire UBI volume to find all nodes, and rebuild
filesystem, always make fsck success.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Set errno if the target is not char device. It will be useful for
fsck to print error message if open_ubi failed.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Replace ubifs related source code with the implementation of linux kernel.
It makes userspace implementation be same with linux kernel, then
fsck.ubifs can resuse the code.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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There are many linux kernel source files have been adapted into
ubifs-utils, add descriptions for these source files in README.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Since ubifs-media.h is only used for ubifs-utils, move it under
ubifs-utils/libubifs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt gc subsystem(find.c, gc.c, scan.c) in libubifs, compared with
linux kernel implementations:
1. Adapt print_hex_dump based on implementations in hexdump.c.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt orphan.c in libubifs, compared with linux kernel implementations:
1. Keep the commit related implementations, because do_commit depends
on these functions which will be invoked in fsck.
2. Keep the orphan replaying implementations, because fsck needs them.
3. Other implementations are removed which won't be used in mkfs/fsck.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt misc.h in libubifs, compared with linux kernel implementations:
1. Remove some functions(eg. ubifs_compr_name, ubifs_wake_up_bgt) which
won't be used in fsck/mkfs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt master.c in libubifs, compared with linux kernel implementations:
1. Remove authentication related implementations
(eg. mst_node_check_hash), authentication is not supported in fsck
for now.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt key.h in libubifs, compared with linux kernel implementations:
1. Add '__unused' modifier for unused parameters to avoid compiling
warnings.
2. Remove some functions(eg. lowest_dent_key, dent_key_init_flash)
which won't be used in fsck/mkfs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt debug subsystem(debug.c, debug.h) in libubifs, compared with
linux kernel implementations:
1. Only keep the disk data and space statistics dumping implementations,
dbg_walk_index and add_size which are used by fsck, other debuging
related implementations and sysfs interfaces are removed, because
fsck will check fs in another way.
2. Change the behavior of ubifs_assert_failed(), make filesystem
readonly when assertion is failed.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt commit.c in libubifs, compared with linux kernel implementations:
1. Remove debug related implementations(eg. dbg_check_old_index), debug
functions are not needed by fsck, because fsck will check fs in
another way.
2. Remove ubifs background committing related implementations, there
will be no background ubifs threads in fsck.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt budget.c in libubifs, compared with linux kernel implementations:
1. Remove writeback related functions, there are no dirty pages/inodes
for UBIFS in userspace process.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt journal.c in libubifs, compared with linux kernel implementations:
1. Remove all ubifs_jnl_XXX functions. Only keep the basic space
reservation code, fsck will add new functions for journaling
operations without using linux in-memory inode/dentry.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt dir.c in libubifs, compared with linux kernel implementations:
1. Remove all functions. Only keep an empty source file, fsck will
add new functions for mkdir/link operations without using linux
in-memory inode/dentry.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt auth.c in libubifs, compared with linux kernel implementations:
1. Only keep implementations used by mkfs, other implementations
are removed.
2. Adapt functions based on implementations in common/sign.c.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt sb.c in libubifs, compared with linux kernel implementations:
1. Remove authentication related implementations
(eg. authenticate_sb_node), authentication is not supported in fsck
for now.
2. Remove some functions(eg. create_default_filesystem) which won't be
used in fsck/mkfs.
3. Modify ubifs_read_superblock(), remove some assignments which won't
be used in mkfs/fsck.
4. Apapt fixup_leb to ignore %-EBADMSG, subsequent steps will check
all areas carefully.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt recovery subsystem(replay.c, recovery.c) in libubifs, compared with
linux kernel implementations:
1. Remove authentication related implementations
(eg. authenticate_sleb_hash), authentication is not supported in fsck
for now.
2. Add explicit type conversions(const char *) to avoid compiling
warnings.
3. Replace implementations of inode_fix_size() with ubifs_assert(0),
authentication is not supported in fsck, so this function won't
be invoked.
4. Remove unused ubifs_clean_lebs() and ubifs_write_rcvrd_mst_node().
5. Adapt fix_unclean_leb/recover_head/fix_size_in_place to ignore
%-EBADMSG, subsequent steps will check nodes in lpt/main area
carefully.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt log.c in libubifs, compared with linux kernel implementations:
1. Remove debug related implementations(eg. dbg_check_bud_bytes), debug
functions are not needed by fsck, because fsck will check fs in
another way.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt tnc subsystem(tnc.c,tnc_misc.c,tnc_commit.c) in libubifs, compared
with linux kernel implementations:
1. Remove debug related functions(eg. dbg_check_inode_size), debug
functions are not needed by fsck, because fsck will check fs in
another way.
2. Remove some functions(eg. ubifs_tnc_bulk_read) which won't be used
in fsck/mkfs.
3. Adapt tnc_delete and ubifs_search_zbranch to handle empty TNC case,
which could happen in fsck.
4. Don't skip checking the length of non-leaf index node's branch in
read_znode.
5. Adapt try_read_node to ignore %-EBADMSG, subsequent steps will check
nodes carefully.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt lpt subsystem(lpt.c,lprops.c,lpt_commit.c) in libubifs, compared
with linux kernel implementations:
1. Remove debug related functions(eg. dbg_chk_lpt_sz, dbg_chk_pnode),
some of debug functions are not needed by fsck, because fsck will
check fs in another way.
2. Remove some functions(eg. ubifs_create_dflt_lpt) which won't be used
in fsck/mkfs.
3. Adapt do_calc_lpt_geom() to mkfs/fsck situations.
4. Adapt calc_dflt_lpt_geom to support the mkfs tool, and export it.
5. Adapt ubifs_create_lpt() according to create_lpt(mkfs), make sure that
the height of created lpt is right.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt io.c in libubifs, compared with linux kernel implementations:
1. Modify io related functions(eg. ubifs_leb_read/ubifs_leb_write,
etc.), adapt them with userspace io functions lseek/read/write.
2. Remove some functions(eg. record_magic_error, ubifs_bg_wbufs_sync)
which won't be used in fsck/mkfs.
3. Replce ubifs_errc with ubifs_err, because there will be no SB_SILENT
options in mkfs/fsck.
4. Initiate wbuf->size as c->max_write_size.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt super.c in libubifs, compared with linux kernel implementations:
1. It contains all definitions in common/super.c(Message printing
functions are replaced with linux kernel styles).
2. Remove some functions(eg. ubifs_iget, ubifs_dirty_inode) which won't
be used in fsck/mkfs.
3. Remove unused variables initialization in some functions(eg.
init_constants_early, init_constants_sb).
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Adapt ubifs header file in libubifs, compared with linux kernel
implementations:
1. New header file contains all definitions in common/ubifs.h
2. Remove some structures(eg. ubifs_mount_opts, bu_info) and
functions(eg. ubifs_sync_wbufs_by_inode, ubifs_jnl_XXX) which
won't be used in fsck/mkfs.
3. Modify some authentication related functions, keep functions
that mkfs may need, other functions are defined as empty.
4. Move ubifs message printing functions(ubifs_err/warn/msg) which
are originally defined in misc.c into ubifs.h.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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There are several new libs(eg. atomic, kmem, bitops. etc.) have
been imported into ubifs-utils, add descriptions for these libs
in README.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add common definitions in linux kernel, which are used in UBIFS linux
kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add ubi_leb_map() implementation, it is used in UBIFS linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add linux hexdump implementations lib, because function print_hex_dump()
is used in UBIFS linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add implementations for linux kernel printing functions, because these
functions(eg. pr_debug, pr_err, etc.) are widely used in UBIFS linux
kernel libs. No need to define multiple levels in dbg_msg for debuging,
just replace dbg_msg with pr_debug. Now, there are five levels of
printing messages:
0 - none
1 - error message
2 - warning message [default]
3 - notice message
4 - debug message
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add sorting implementations, because the sorting function
is used in UBIFS linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add rwsem implementations, because there are some rwsems
(eg. c->commit_sem) used in UBIFS linux kernel libs.
The rwsem is implemented based on pthread mutex.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add mutexlock implementations, because there are some mutexlocks
(eg. c->tnc_mutex, c->log_mutex) used in UBIFS linux kernel libs.
The mutexlock is implemented based on pthread mutex.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add spinlock implementations, because there are some spinlocks
(eg. c->cnt_lock, c->buds_lock) used in UBIFS linux kernel libs.
The spinlock is implemented based on pthread mutex.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add bit operations implementations, because there are some bit operations
(eg. __set_bit, test_bit) used in UBIFS linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add atomic implementations, because there are some atomic operations
(eg. atomic_long_xxx) used in UBIFS linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add linux kernel memory allocation implementations, because there are many
memory allocations(eg. kmalloc, kzalloc) used in UBIFS linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add linux kernel error conversion definitions, because there are
many error type conversions(eg. PTR_ERR, ERR_PTR) used in UBIFS
linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add linux type definitions, because there are many types
(eg. u8/u16/u64) used in UBIFS linux kernel libs. Besides
move type conversions (eg. cpu_to_le16, cpu_to_le32, etc.)
into type definitions header file.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add compiler attributes implementations, such as __packed, __unused,
__const, etc., which could be used in linux kernel libs. Besides, change
some existing attributes into linux kernel style.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Import UBIFS libs from linux kernel. Next patches will replace ubifs
related source code with implementation of linux kernel, which makes
userspace implementation be same with linux kernel, then fsck.ubifs
can resuse the code.
Notice: lpt.c is modified with [1] applied. ubifs.h and orphan.c are
modified with [2] applied, journal.c is modified with [3] reverted(
because fsck runs in a single thread, so waitqueue is not needed to
be implemented in userspace.).
[1] https://lore.kernel.org/linux-mtd/20231228014112.2836317-13-chengzhihao1@huawei.com/
[2] https://lore.kernel.org/linux-mtd/20240410073751.2522830-1-chengzhihao1@huawei.com/
[3] https://lore.kernel.org/linux-mtd/20240122063103.359501-1-chengzhihao1@huawei.com/
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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new source file
Move UBI opening/closing/volume_check_empty functions into common/super.c.
These functions will be used in fsck.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Embed new members 'dev_fd' and 'libubi' into ubifs_info structure, so
that global variable 'ubi', 'out_fd' and 'out_ubi' could be removed
from mkfs.ubifs.c. Besides, add parameter in check_volume_empty().
Next patch will extract UBI opening/closing/check_volume_empty functions
into a new source file, these functions will be used in fsck.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Embed new member 'dev_name' into 'ubifs_info' structure, then global
variable 'output' can be removed from mkfs.ubifs.c. Next patches will
import UBIFS libs from linux kernel, which could print messages that
contain device information, so this patch can distinguish different
devices according to messages.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Embed new member 'debug_level' into 'ubifs_info' structure, then global
variable 'debug_level' can be removed from mkfs.ubifs.c. Next patches
will import UBIFS libs from linux kernel, which could print messages
with different levels, then 'debug_level' can be used to control which
level messages should be printed.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Functions 'err_msg' and 'sys_err_msg' are almost same with 'errmsg' and
'sys_errmsg', since 'errmsg' and 'sys_errmsg' can print programe name,
so replace error message printing functions (ubifs-utils) with common
lib functions(include/common.h).
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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PROGRAM_NAME is defined as a const string "mkfs.ubifs", which won't be
suitable for fsck.ubifs. Add 'program_name' member in ubifs_info
structure, define PROGRAM_NAME as ubifs_info.program_name. Then, error
messages will display right program name if fsck.ubifs is supported.
Besides, add 'program_type' member in ubifs_info structure to identify
which current program type is, without comparing program name.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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