ext4: update the descriptions of data_err=abort and data_err=ignore

We now print error messages in ext4_end_bio() when page writeback
encounters an error. If data_err=abort is set, the journal will

ext4: update the descriptions of data_err=abort and data_err=ignore

We now print error messages in ext4_end_bio() when page writeback
encounters an error. If data_err=abort is set, the journal will also
be aborted in a kworker. This means that we now check all Buffer I/O
in all modes and decide whether to abort the journal based on the
data_err option. Therefore, we remove the ordered mode restriction
in the descriptions of data_err=abort and data_err=ignore.

Signed-off-by: Baokun Li <[email protected]>
Reviewed-by: Zhang Yi <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>

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Documentation: ext4.rst: remove obsolete descriptions of noacl/nouser_xattr options

These have been deprecated for a decade[1] and removed two years ago[2].
1: f70486055ee351158bd6999f3965ad378b52c6

Documentation: ext4.rst: remove obsolete descriptions of noacl/nouser_xattr options

These have been deprecated for a decade[1] and removed two years ago[2].
1: f70486055ee351158bd6999f3965ad378b52c694
2: 2d544ec923dbe5fbed64a7f43dccf527218380bc

Signed-off-by: Stefan Tauner <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>

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ext4: Remove the logic to trim inode PAs

Earlier, inode PAs were stored in a linked list. This caused a need to
periodically trim the list down inorder to avoid growing it to a very
large size, as t

ext4: Remove the logic to trim inode PAs

Earlier, inode PAs were stored in a linked list. This caused a need to
periodically trim the list down inorder to avoid growing it to a very
large size, as this would severly affect performance during list
iteration.

Recent patches changed this list to an rbtree, and since the tree scales
up much better, we no longer need to have the trim functionality, hence
remove it.

Signed-off-by: Ojaswin Mujoo <[email protected]>
Reviewed-by: Ritesh Harjani (IBM) <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Link: https://lore.kernel.org/r/c409addceaa3ade4b40328e28e3b54b2f259689e.1679731817.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <[email protected]>

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docs: fix a cross-ref

Commit acda97acb2e98c9 changes dax.txt to dax.rst.
Fix the references accordingly.

Cc: Igor Matheus Andrade Torrente <[email protected]>
Signed-off-by: Kir Kolyshkin <ko

docs: fix a cross-ref

Commit acda97acb2e98c9 changes dax.txt to dax.rst.
Fix the references accordingly.

Cc: Igor Matheus Andrade Torrente <[email protected]>
Signed-off-by: Kir Kolyshkin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Corbet <[email protected]>

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ext4: limit the length of per-inode prealloc list

In the scenario of writing sparse files, the per-inode prealloc list may
be very long, resulting in high overhead for ext4_mb_use_preallocated().
To

ext4: limit the length of per-inode prealloc list

In the scenario of writing sparse files, the per-inode prealloc list may
be very long, resulting in high overhead for ext4_mb_use_preallocated().
To circumvent this problem, we limit the maximum length of per-inode
prealloc list to 512 and allow users to modify it.

After patching, we observed that the sys ratio of cpu has dropped, and
the system throughput has increased significantly. We created a process
to write the sparse file, and the running time of the process on the
fixed kernel was significantly reduced, as follows:

Running time on unfixed kernel：
[root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat
real 0m2.051s
user 0m0.008s
sys 0m2.026s

Running time on fixed kernel：
[root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat
real 0m0.471s
user 0m0.004s
sys 0m0.395s

Signed-off-by: Chunguang Xu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>

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ext4: use generic names for generic ioctls

Don't define EXT4_IOC_* aliases to ioctls that already have a generic
FS_IOC_* name. These aliases are unnecessary, and they make it unclear
which ioctls

ext4: use generic names for generic ioctls

Don't define EXT4_IOC_* aliases to ioctls that already have a generic
FS_IOC_* name. These aliases are unnecessary, and they make it unclear
which ioctls are ext4-specific and which are generic.

Exception: leave EXT4_IOC_GETVERSION_OLD and EXT4_IOC_SETVERSION_OLD
as-is for now, since renaming them to FS_IOC_GETVERSION and
FS_IOC_SETVERSION would probably make them more likely to be confused
with EXT4_IOC_GETVERSION and EXT4_IOC_SETVERSION which also exist.

Signed-off-by: Eric Biggers <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>

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ext4: add inline encryption support

Wire up ext4 to support inline encryption via the helper functions which
fs/crypto/ now provides. This includes:

- Adding a mount option 'inlinecrypt' which ena

ext4: add inline encryption support

Wire up ext4 to support inline encryption via the helper functions which
fs/crypto/ now provides. This includes:

- Adding a mount option 'inlinecrypt' which enables inline encryption
on encrypted files where it can be used.

- Setting the bio_crypt_ctx on bios that will be submitted to an
inline-encrypted file.

Note: submit_bh_wbc() in fs/buffer.c also needed to be patched for
this part, since ext4 sometimes uses ll_rw_block() on file data.

- Not adding logically discontiguous data to bios that will be submitted
to an inline-encrypted file.

- Not doing filesystem-layer crypto on inline-encrypted files.

Co-developed-by: Satya Tangirala <[email protected]>
Signed-off-by: Satya Tangirala <[email protected]>
Reviewed-by: Theodore Ts'o <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Eric Biggers <[email protected]>

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Replace HTTP links with HTTPS ones: Documentation/admin-guide

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministi

Replace HTTP links with HTTPS ones: Documentation/admin-guide

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
If not .svg:
For each line:
If doesn't contain `\bxmlns\b`:
For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
If both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jonathan Corbet <[email protected]>

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docs: ext4.rst: add encryption and verity to features list

Mention encryption and verity in the ext4 features list.

Signed-off-by: Eric Biggers <[email protected]>
Link: https://lore.kernel.org/r

docs: ext4.rst: add encryption and verity to features list

Mention encryption and verity in the ext4 features list.

Signed-off-by: Eric Biggers <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>

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ext4: clarify impact of 'commit' mount option

The description of 'commit' mount option dates back to ext3 times.
Update the description to match current meaning for ext4.

Reported-by: Paul Richards

ext4: clarify impact of 'commit' mount option

The description of 'commit' mount option dates back to ext3 times.
Update the description to match current meaning for ext4.

Reported-by: Paul Richards <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>

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docs: ext4.rst: document case-insensitive directories

Introduces the case-insensitive features on ext4 for system
administrators. Explain the minimum of design decisions that are
important for sysa

docs: ext4.rst: document case-insensitive directories

Introduces the case-insensitive features on ext4 for system
administrators. Explain the minimum of design decisions that are
important for sysadmins wanting to enable this feature.

Signed-off-by: Gabriel Krisman Bertazi <[email protected]>
Signed-off-by: Theodore Ts'o <[email protected]>

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docs: move ext4 administrative docs to admin-guide/

Move the ext4 mount option and other administrative stuff to the Linux
administrator's guide.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle

docs: move ext4 administrative docs to admin-guide/

Move the ext4 mount option and other administrative stuff to the Linux
administrator's guide.

Signed-off-by: Darrick J. Wong <[email protected]>
Signed-off-by: Theodore Ts'o <[email protected]>

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