linux.git/include/linux/ceph/libceph.h, branch v6.18.21

libceph: drop started parameter of __ceph_open_session()

2025-11-26T22:29:11+00:00

With the previous commit revamping the timeout handling, started isn't
used anymore.  It could be taken into account by adjusting the initial
value of the timeout, but there is little point as both callers capture
the timestamp shortly before calling __ceph_open_session() -- the only
thing of note that happens in the interim is taking client->mount_mutex
and that isn't expected to take multiple seconds.

Signed-off-by: Ilya Dryomov 
Reviewed-by: Viacheslav Dubeyko

libceph: Remove unused pagevec functions

2024-11-18T16:34:35+00:00

ceph_copy_user_to_page_vector() has been unused since 2013's commit
e8344e668915 ("ceph: Implement writev/pwritev for sync operation.")

ceph_copy_to_page_vector() has been unused since 2012's commit
913d2fdcf605 ("rbd: always pass ops array to rbd_req_sync_op()")

Remove them.

Signed-off-by: Dr. David Alan Gilbert 
Reviewed-by: Ilya Dryomov 
Signed-off-by: Ilya Dryomov

move asm/unaligned.h to linux/unaligned.h

2024-10-02T21:23:23+00:00

asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.

auto-generated by the following:

for i in `git grep -l -w asm/unaligned.h`; do
	sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
	sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h

ceph: move mount state enum to super.h

2023-02-02T12:40:23+00:00

These flags are only used in ceph filesystem in fs/ceph, so just
move it to the place it should be.

Signed-off-by: Xiubo Li 
Reviewed-by: Venky Shankar 
Signed-off-by: Ilya Dryomov

ceph: move to a dedicated slabcache for ceph_cap_snap

2022-03-01T17:26:37+00:00

There could be huge number of capsnaps around at any given time. On
x86_64 the structure is 248 bytes, which will be rounded up to 256 bytes
by kzalloc. Move this to a dedicated slabcache to save 8 bytes for each.

[ jlayton: use kmem_cache_zalloc ]

Signed-off-by: Xiubo Li 
Signed-off-by: Jeff Layton 
Signed-off-by: Ilya Dryomov

libceph: optionally use bounce buffer on recv path in crc mode

2022-02-02T17:50:36+00:00

Both msgr1 and msgr2 in crc mode are zero copy in the sense that
message data is read from the socket directly into the destination
buffer.  We assume that the destination buffer is stable (i.e. remains
unchanged while it is being read to) though.  Otherwise, CRC errors
ensue:

  libceph: read_partial_message 0000000048edf8ad data crc 1063286393 != exp. 228122706
  libceph: osd1 (1)192.168.122.1:6843 bad crc/signature

  libceph: bad data crc, calculated 57958023, expected 1805382778
  libceph: osd2 (2)192.168.122.1:6876 integrity error, bad crc

Introduce rxbounce option to enable use of a bounce buffer when
receiving message data.  In particular this is needed if a mapped
image is a Windows VM disk, passed to QEMU.  Windows has a system-wide
"dummy" page that may be mapped into the destination buffer (potentially
more than once into the same buffer) by the Windows Memory Manager in
an effort to generate a single large I/O [1][2].  QEMU makes a point of
preserving overlap relationships when cloning I/O vectors, so krbd gets
exposed to this behaviour.

[1] "What Is Really in That MDL?"
    https://docs.microsoft.com/en-us/previous-versions/windows/hardware/design/dn614012(v=vs.85)
[2] https://blogs.msmvps.com/kernelmustard/2005/05/04/dummy-pages/

URL: https://bugzilla.redhat.com/show_bug.cgi?id=1973317
Signed-off-by: Ilya Dryomov 
Reviewed-by: Jeff Layton

Merge tag 'ceph-for-5.17-rc1' of git://github.com/ceph/ceph-client

2022-01-20T11:46:20+00:00

Pull ceph updates from Ilya Dryomov:
 "The highlight is the new mount "device" string syntax implemented by
  Venky Shankar. It solves some long-standing issues with using
  different auth entities and/or mounting different CephFS filesystems
  from the same cluster, remounting and also misleading /proc/mounts
  contents. The existing syntax of course remains to be maintained.

  On top of that, there is a couple of fixes for edge cases in quota and
  a new mount option for turning on unbuffered I/O mode globally instead
  of on a per-file basis with ioctl(CEPH_IOC_SYNCIO)"

* tag 'ceph-for-5.17-rc1' of git://github.com/ceph/ceph-client:
  ceph: move CEPH_SUPER_MAGIC definition to magic.h
  ceph: remove redundant Lsx caps check
  ceph: add new "nopagecache" option
  ceph: don't check for quotas on MDS stray dirs
  ceph: drop send metrics debug message
  rbd: make const pointer spaces a static const array
  ceph: Fix incorrect statfs report for small quota
  ceph: mount syntax module parameter
  doc: document new CephFS mount device syntax
  ceph: record updated mon_addr on remount
  ceph: new device mount syntax
  libceph: rename parse_fsid() to ceph_parse_fsid() and export
  libceph: generalize addr/ip parsing based on delimiter

mm: allow !GFP_KERNEL allocations for kvmalloc

2022-01-15T14:30:29+00:00

Support for GFP_NO{FS,IO} and __GFP_NOFAIL has been implemented by
previous patches so we can allow the support for kvmalloc.  This will
allow some external users to simplify or completely remove their
helpers.

GFP_NOWAIT semantic hasn't been supported so far but it hasn't been
explicitly documented so let's add a note about that.

ceph_kvmalloc is the first helper to be dropped and changed to kvmalloc.

Link: https://lkml.kernel.org/r/20211122153233.9924-5-mhocko@kernel.org
Signed-off-by: Michal Hocko 
Reviewed-by: Uladzislau Rezki (Sony) 
Acked-by: Vlastimil Babka 
Cc: Christoph Hellwig 
Cc: Dave Chinner 
Cc: Ilya Dryomov 
Cc: Jeff Layton 
Cc: Neil Brown 
Cc: Sebastian Andrzej Siewior 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

libceph: rename parse_fsid() to ceph_parse_fsid() and export

2022-01-13T12:40:06+00:00

... as it is too generic. also, use __func__ when logging
rather than hardcoding the function name.

Signed-off-by: Venky Shankar 
Reviewed-by: Jeff Layton 
Signed-off-by: Ilya Dryomov

libceph: generalize addr/ip parsing based on delimiter

2022-01-13T12:40:05+00:00

... and remove hardcoded function name in ceph_parse_ips().

[ idryomov: delim parameter, drop CEPH_ADDR_PARSE_DEFAULT_DELIM ]

Signed-off-by: Venky Shankar 
Reviewed-by: Jeff Layton 
Signed-off-by: Ilya Dryomov