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2022-02-02libceph: optionally use bounce buffer on recv path in crc modeIlya Dryomov1-0/+7
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 <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2022-01-20Merge tag 'ceph-for-5.17-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds1-9/+9
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
2022-01-15mm: allow !GFP_KERNEL allocations for kvmallocMichal Hocko1-27/+0
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 <mhocko@suse.com> Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: Jeff Layton <jlayton@kernel.org> Cc: Neil Brown <neilb@suse.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-13libceph: rename parse_fsid() to ceph_parse_fsid() and exportVenky Shankar1-4/+5
... as it is too generic. also, use __func__ when logging rather than hardcoding the function name. Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2022-01-13libceph: generalize addr/ip parsing based on delimiterVenky Shankar1-5/+4
... and remove hardcoded function name in ceph_parse_ips(). [ idryomov: delim parameter, drop CEPH_ADDR_PARSE_DEFAULT_DELIM ] Signed-off-by: Venky Shankar <vshankar@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-02-16libceph: remove osdtimeout option entirelyIlya Dryomov1-6/+0
Commit 83aff95eb9d6 ("libceph: remove 'osdtimeout' option") deprecated osdtimeout over 8 years ago, but it is still recognized. Let's remove it entirely. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2021-02-16libceph: deprecate [no]cephx_require_signatures optionsIlya Dryomov1-6/+5
These options were introduced in 3.19 with support for message signing and are rather useless, as explained in commit a51983e4dd2d ("libceph: add nocephx_sign_messages option"). Deprecate them. In case there is someone out there with a cluster that lacks support for MSG_AUTH feature (very unlikely but has to be considered since we haven't formally raised the bar from argonaut to bobtail yet), make nocephx_sign_messages also waive MSG_AUTH requirement. This is probably how it should have been done in the first place -- if we aren't going to sign, requiring the signing feature makes no sense. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2020-12-14libceph: introduce connection modes and ms_mode optionIlya Dryomov1-0/+63
msgr2 supports two connection modes: crc (plain) and secure (on-wire encryption). Connection mode is picked by server based on input from client. Introduce ms_mode option: ms_mode=legacy - msgr1 (default) ms_mode=crc - crc mode, if denied fail ms_mode=secure - secure mode, if denied fail ms_mode=prefer-crc - crc mode, if denied agree to secure mode ms_mode=prefer-secure - secure mode, if denied agree to crc mode ms_mode affects all connections, we don't separate connections to mons like it's done in userspace with ms_client_mode vs ms_mon_client_mode. For now the default is legacy, to be flipped to prefer-crc after some time. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-06-16libceph: move away from global osd_req_flagsIlya Dryomov1-8/+6
osd_req_flags is overly general and doesn't suit its only user (read_from_replica option) well: - applying osd_req_flags in account_request() affects all OSD requests, including linger (i.e. watch and notify). However, linger requests should always go to the primary even though some of them are reads (e.g. notify has side effects but it is a read because it doesn't result in mutation on the OSDs). - calls to class methods that are reads are allowed to go to the replica, but most such calls issued for "rbd map" and/or exclusive lock transitions are requested to be resent to the primary via EAGAIN, doubling the latency. Get rid of global osd_req_flags and set read_from_replica flag only on specific OSD requests instead. Fixes: 8ad44d5e0d1e ("libceph: read_from_replica option") Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2020-06-08Merge tag 'ceph-for-5.8-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds1-0/+75
Pull ceph updates from Ilya Dryomov: "The highlights are: - OSD/MDS latency and caps cache metrics infrastructure for the filesytem (Xiubo Li). Currently available through debugfs and will be periodically sent to the MDS in the future. - support for replica reads (balanced and localized reads) for rbd and the filesystem (myself). The default remains to always read from primary, users can opt-in with the new crush_location and read_from_replica options. Note that reading from replica is safe for general use only since Octopus. - support for RADOS allocation hint flags (myself). Currently used by rbd to propagate the compressible/incompressible hint given with the new compression_hint map option and ready for passing on more advanced hints, e.g. based on fadvise() from the filesystem. - support for efficient cross-quota-realm renames (Luis Henriques) - assorted cap handling improvements and cleanups, particularly untangling some of the locking (Jeff Layton)" * tag 'ceph-for-5.8-rc1' of git://github.com/ceph/ceph-client: (29 commits) rbd: compression_hint option libceph: support for alloc hint flags libceph: read_from_replica option libceph: support for balanced and localized reads libceph: crush_location infrastructure libceph: decode CRUSH device/bucket types and names libceph: add non-asserting rbtree insertion helper ceph: skip checking caps when session reconnecting and releasing reqs ceph: make sure mdsc->mutex is nested in s->s_mutex to fix dead lock ceph: don't return -ESTALE if there's still an open file libceph, rbd: replace zero-length array with flexible-array ceph: allow rename operation under different quota realms ceph: normalize 'delta' parameter usage in check_quota_exceeded ceph: ceph_kick_flushing_caps needs the s_mutex ceph: request expedited service on session's last cap flush ceph: convert mdsc->cap_dirty to a per-session list ceph: reset i_requested_max_size if file write is not wanted ceph: throw a warning if we destroy session with mutex still locked ceph: fix potential race in ceph_check_caps ceph: document what protects i_dirty_item and i_flushing_item ...
2020-06-02mm: remove map_vm_rangeChristoph Hellwig1-2/+1
Switch all callers to map_kernel_range, which symmetric to the unmap side (as well as the _noflush versions). Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Gao Xiang <xiang@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Kelley <mikelley@microsoft.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Wei Liu <wei.liu@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200414131348.444715-17-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-01libceph: read_from_replica optionIlya Dryomov1-0/+39
Expose replica reads through read_from_replica=balance and read_from_replica=localize. The default is to read from primary (read_from_replica=no). Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2020-06-01libceph: crush_location infrastructureIlya Dryomov1-0/+36
Allow expressing client's location in terms of CRUSH hierarchy as a set of (bucket type name, bucket name) pairs. The userspace syntax "crush_location = key1=value1 key2=value2" is incompatible with mount options and needed adaptation. Key-value pairs are separated by '|' and we use ':' instead of '=' to separate keys from values. So for: crush_location = host=foo rack=bar one would write: crush_location=host:foo|rack:bar As in userspace, "multipath" locations are supported, so indicating locality for parallel hierarchies is possible: crush_location=rack:foo1|rack:foo2|datacenter:bar Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2020-02-07fs_parse: fold fs_parameter_desc/fs_parameter_specAl Viro1-6/+2
The former contains nothing but a pointer to an array of the latter... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-02-07fs_parser: remove fs_parameter_description name fieldEric Sandeen1-1/+0
Unused now. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-02-07ceph_parse_param(), ceph_parse_mon_ips(): switch to passing fc_logAl Viro1-4/+4
... and now errorf() et.al. are never called with NULL fs_context, so we can get rid of conditional in those. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-02-07new primitive: __fs_parse()Al Viro1-1/+1
fs_parse() analogue taking p_log instead of fs_context. fs_parse() turned into a wrapper, callers in ceph_common and rbd switched to __fs_parse(). As the result, fs_parse() never gets NULL fs_context and neither do fs_context-based logging primitives Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-02-07switch rbd and libceph to p_log-based primitivesAl Viro1-12/+14
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-02-07fs_parse: get rid of ->enumsAl Viro1-1/+1
Don't do a single array; attach them to fsparam_enum() entry instead. And don't bother trying to embed the names into those - it actually loses memory, with no real speedup worth mentioning. Simplifies validation as well. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-11-27libceph, rbd, ceph: convert to use the new mount APIDavid Howells1-229/+190
Convert the ceph filesystem to the new internal mount API as the old one will be obsoleted and removed. This allows greater flexibility in communication of mount parameters between userspace, the VFS and the filesystem. See Documentation/filesystems/mount_api.txt for more information. [ Numerous string handling, leak and regression fixes; rbd conversion was particularly broken and had to be redone almost from scratch. ] Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-09-16libceph: avoid a __vmalloc() deadlock in ceph_kvmalloc()Ilya Dryomov1-6/+23
The vmalloc allocator doesn't fully respect the specified gfp mask: while the actual pages are allocated as requested, the page table pages are always allocated with GFP_KERNEL. ceph_kvmalloc() may be called with GFP_NOFS and GFP_NOIO (for ceph and rbd respectively), so this may result in a deadlock. There is no real reason for the current PAGE_ALLOC_COSTLY_ORDER logic, it's just something that seemed sensible at the time (ceph_kvmalloc() predates kvmalloc()). kvmalloc() is smarter: in an attempt to reduce long term fragmentation, it first tries to kmalloc non-disruptively. Switch to kvmalloc() and set the respective PF_MEMALLOC_* flag using the scope API to avoid the deadlock. Note that kvmalloc() needs to be passed GFP_KERNEL to enable the fallback. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org>
2019-09-16libceph: add function that reset client's entity addrYan, Zheng1-0/+8
This function also re-open connections to OSD/MON, and re-send in-flight OSD requests after re-opening connections to OSD. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-07-03ceph: no need to check return value of debugfs_create functionsGreg Kroah-Hartman1-4/+1
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. This cleanup allows the return value of the functions to be made void, as no logic should care if these files succeed or not. Cc: "Yan, Zheng" <zyan@redhat.com> Cc: Sage Weil <sage@redhat.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: ceph-devel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20190612145538.GA18772@kroah.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier for more missed filesThomas Gleixner1-0/+1
Add SPDX license identifiers to all files which: - Have no license information of any form - Have MODULE_LICENCE("GPL*") inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-20libceph: wait for latest osdmap in ceph_monc_blacklist_add()Ilya Dryomov1-1/+17
Because map updates are distributed lazily, an OSD may not know about the new blacklist for quite some time after "osd blacklist add" command is completed. This makes it possible for a blacklisted but still alive client to overwrite a post-blacklist update, resulting in data corruption. Waiting for latest osdmap in ceph_monc_blacklist_add() and thus using the post-blacklist epoch for all post-blacklist requests ensures that all such requests "wait" for the blacklist to come into force on their respective OSDs. Cc: stable@vger.kernel.org Fixes: 6305a3b41515 ("libceph: support for blacklisting clients") Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jason Dillaman <dillaman@redhat.com>
2019-01-07libceph: allow setting abort_on_full for rbdDongsheng Yang1-1/+10
Introduce a new option abort_on_full, default to false. Then we can get -ENOSPC when the pool is full, or reaches quota. [ Don't show abort_on_full in /proc/mounts. ] Signed-off-by: Dongsheng Yang <dongsheng.yang@easystack.cn> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-08-13libceph: remove unnecessary non NULL check for request_keyYueHaibing1-1/+1
request_key never return NULL,so no need do non-NULL check. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-08-02libceph: amend "bad option arg" error messageIlya Dryomov1-2/+1
Don't mention "mount" -- in the rbd case it is "mapping". Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-08-02libceph: stop parsing when a bad int arg is detectedChengguang Xu1-4/+4
There is no reason to continue option parsing after detecting bad option. [ Return match_int() errors from ceph_parse_options() to match the behaviour of parse_rbd_opts_token() and parse_fsopt_token(). ] Signed-off-by: Chengguang Xu <cgxu519@gmx.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-04-10Merge tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds1-1/+7
Pull ceph updates from Ilya Dryomov: "The big ticket items are: - support for rbd "fancy" striping (myself). The striping feature bit is now fully implemented, allowing mapping v2 images with non-default striping patterns. This completes support for --image-format 2. - CephFS quota support (Luis Henriques and Zheng Yan). This set is based on the new SnapRealm code in the upcoming v13.y.z ("Mimic") release. Quota handling will be rejected on older filesystems. - memory usage improvements in CephFS (Chengguang Xu). Directory specific bits have been split out of ceph_file_info and some effort went into improving cap reservation code to avoid OOM crashes. Also included a bunch of assorted fixes all over the place from Chengguang and others" * tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client: (67 commits) ceph: quota: report root dir quota usage in statfs ceph: quota: add counter for snaprealms with quota ceph: quota: cache inode pointer in ceph_snap_realm ceph: fix root quota realm check ceph: don't check quota for snap inode ceph: quota: update MDS when max_bytes is approaching ceph: quota: support for ceph.quota.max_bytes ceph: quota: don't allow cross-quota renames ceph: quota: support for ceph.quota.max_files ceph: quota: add initial infrastructure to support cephfs quotas rbd: remove VLA usage rbd: fix spelling mistake: "reregisteration" -> "reregistration" ceph: rename function drop_leases() to a more descriptive name ceph: fix invalid point dereference for error case in mdsc destroy ceph: return proper bool type to caller instead of pointer ceph: optimize memory usage ceph: optimize mds session register libceph, ceph: add __init attribution to init funcitons ceph: filter out used flags when printing unused open flags ceph: don't wait on writeback when there is no more dirty pages ...
2018-04-02ceph: quota: add initial infrastructure to support cephfs quotasLuis Henriques1-0/+1
This patch adds the infrastructure required to support cephfs quotas as it is currently implemented in the ceph fuse client. Cephfs quotas can be set on any directory, and can restrict the number of bytes or the number of files stored beneath that point in the directory hierarchy. Quotas are set using the extended attributes 'ceph.quota.max_files' and 'ceph.quota.max_bytes', and can be removed by setting these attributes to '0'. Link: http://tracker.ceph.com/issues/22372 Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-04-02libceph: adding missing message types to ceph_msg_type_name()Chengguang Xu1-0/+5
Some of message types are missing in ceph_msg_type_name(), so just adding them for better understanding of output information. Signed-off-by: Chengguang Xu <cgxu519@icloud.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-04-02ceph: add newline to end of debug message formatChengguang Xu1-1/+1
Some of dout format do not include newline in the end, fix for the files which are in fs/ceph and net/ceph directories, and changing printk to dout for printing debug info in super.c Signed-off-by: Chengguang Xu <cgxu519@icloud.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-03-26net: Use octal not symbolic permissionsJoe Perches1-1/+1
Prefer the direct use of octal for permissions. Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace and some typing. Miscellanea: o Whitespace neatening around these conversions. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-26libceph, ceph: avoid memory leak when specifying same option several timesChengguang Xu1-0/+7
When parsing string option, in order to avoid memory leak we need to carefully free it first in case of specifying same option several times. Signed-off-by: Chengguang Xu <cgxu519@icloud.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2018-01-29libceph: check kstrndup() return valueChengguang Xu1-0/+4
Should check result of kstrndup() in case of memory allocation failure. Signed-off-by: Chengguang Xu <cgxu519@icloud.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-07-15Merge tag 'random_for_linus' of ↵Linus Torvalds1-1/+5
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random Pull random updates from Ted Ts'o: "Add wait_for_random_bytes() and get_random_*_wait() functions so that callers can more safely get random bytes if they can block until the CRNG is initialized. Also print a warning if get_random_*() is called before the CRNG is initialized. By default, only one single-line warning will be printed per boot. If CONFIG_WARN_ALL_UNSEEDED_RANDOM is defined, then a warning will be printed for each function which tries to get random bytes before the CRNG is initialized. This can get spammy for certain architecture types, so it is not enabled by default" * tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random: random: reorder READ_ONCE() in get_random_uXX random: suppress spammy warnings about unseeded randomness random: warn when kernel uses unseeded randomness net/route: use get_random_int for random counter net/neighbor: use get_random_u32 for 32-bit hash random rhashtable: use get_random_u32 for hash_rnd ceph: ensure RNG is seeded before using iscsi: ensure RNG is seeded before use cifs: use get_random_u32 for 32-bit lock random random: add get_random_{bytes,u32,u64,int,long,once}_wait family random: add wait_for_random_bytes() API
2017-07-07libceph: respect RADOS_BACKOFF backoffsIlya Dryomov1-0/+1
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-06-19ceph: ensure RNG is seeded before usingJason A. Donenfeld1-1/+5
Ceph uses the RNG for various nonce generations, and it shouldn't accept using bad randomness. So, we wait for the RNG to be properly seeded. We do this by calling wait_for_random_bytes() in a function that is certainly called in process context, early on, so that all subsequent calls to get_random_bytes are necessarily acceptable. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: "Yan, Zheng" <zyan@redhat.com> Cc: Sage Weil <sage@redhat.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2017-05-23libceph: use kbasename() and kill ceph_file_part()Ilya Dryomov1-13/+0
Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Alex Elder <elder@linaro.org>
2017-05-10Merge tag 'ceph-for-4.12-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds1-10/+17
Pull ceph updates from Ilya Dryomov: "The two main items are support for disabling automatic rbd exclusive lock transfers from myself and the long awaited -ENOSPC handling series from Jeff. The former will allow rbd users to take advantage of exclusive lock's built-in blacklist/break-lock functionality while staying in control of who owns the lock. With the latter in place, we will abort filesystem writes on -ENOSPC instead of having them block indefinitely. Beyond that we've got the usual pile of filesystem fixes from Zheng, some refcount_t conversion patches from Elena and a patch for an ancient open() flags handling bug from Alexander" * tag 'ceph-for-4.12-rc1' of git://github.com/ceph/ceph-client: (31 commits) ceph: fix memory leak in __ceph_setxattr() ceph: fix file open flags on ppc64 ceph: choose readdir frag based on previous readdir reply rbd: exclusive map option rbd: return ResponseMessage result from rbd_handle_request_lock() rbd: kill rbd_is_lock_supported() rbd: support updating the lock cookie without releasing the lock rbd: store lock cookie rbd: ignore unlock errors rbd: fix error handling around rbd_init_disk() rbd: move rbd_unregister_watch() call into rbd_dev_image_release() rbd: move rbd_dev_destroy() call out of rbd_dev_image_release() ceph: when seeing write errors on an inode, switch to sync writes Revert "ceph: SetPageError() for writeback pages if writepages fails" ceph: handle epoch barriers in cap messages libceph: add an epoch_barrier field to struct ceph_osd_client libceph: abort already submitted but abortable requests when map or pool goes full libceph: allow requests to return immediately on full conditions if caller wishes libceph: remove req->r_replay_version ceph: make seeky readdir more efficient ...
2017-05-08mm, vmalloc: use __GFP_HIGHMEM implicitlyMichal Hocko1-1/+1
__vmalloc* allows users to provide gfp flags for the underlying allocation. This API is quite popular $ git grep "=[[:space:]]__vmalloc\|return[[:space:]]*__vmalloc" | wc -l 77 The only problem is that many people are not aware that they really want to give __GFP_HIGHMEM along with other flags because there is really no reason to consume precious lowmemory on CONFIG_HIGHMEM systems for pages which are mapped to the kernel vmalloc space. About half of users don't use this flag, though. This signals that we make the API unnecessarily too complex. This patch simply uses __GFP_HIGHMEM implicitly when allocating pages to be mapped to the vmalloc space. Current users which add __GFP_HIGHMEM are simplified and drop the flag. Link: http://lkml.kernel.org/r/20170307141020.29107-1-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: David Rientjes <rientjes@google.com> Cc: Cristopher Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-04libceph: supported_features module parameterIlya Dryomov1-0/+11
Add a readonly, exported to sysfs module parameter so that userspace can generate meaningful error messages. It's a bit funky, but there is no other libceph-specific place. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-05-04libceph, ceph: always advertise all supported featuresIlya Dryomov1-10/+6
No reason to hide CephFS-specific features in the rbd case. Recent feature bits mix RADOS and CephFS-specific stuff together anyway. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-03-07libceph: osd_request_timeout optionIlya Dryomov1-0/+15
osd_request_timeout specifies how many seconds to wait for a response from OSDs before returning -ETIMEDOUT from an OSD request. 0 (default) means no limit. osd_request_timeout is osdkeepalive-precise -- in-flight requests are swept through every osdkeepalive seconds. With ack vs commit behaviour gone, abort_request() is really simple. This is based on a patch from Artur Molchanov <artur.molchanov@synesis.ru>. Tested-by: Artur Molchanov <artur.molchanov@synesis.ru> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Sage Weil <sage@redhat.com>
2016-08-24rbd: add 'client_addr' sysfs rbd device attributeIlya Dryomov1-0/+6
Export client addr/nonce, so userspace can check if a image is being blacklisted. Signed-off-by: Mike Christie <mchristi@redhat.com> [idryomov@gmail.com: ceph_client_addr(), endianess fix] Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-08-24libceph: rename ceph_client_id() -> ceph_client_gid()Ilya Dryomov1-3/+4
It's gid / global_id in other places. Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Alex Elder <elder@linaro.org>
2016-07-28libceph: introduce reference counted stringYan, Zheng1-0/+2
The data structure is for storing namesapce string. It allows namespace string to be shared between cephfs inodes with same layout. This data structure can also be referenced by OSD request. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-05-26ceph: make logical calculation functions return boolZhang Zhuoyu1-1/+1
This patch makes serverl logical caculation functions return bool to improve readability due to these particular functions only using 0/1 as their return value. No functional change. Signed-off-by: Zhang Zhuoyu <zhangzhuoyu@cmss.chinamobile.com>
2016-03-25libceph: monc ping rate is 10sIlya Dryomov1-1/+0
Split ping interval and ping timeout: ping interval is 10s; keepalive timeout is 30s. Make monc_ping_timeout a constant while at it - it's not actually exported as a mount option (and the rest of tick-related settings won't be either), so it's got no place in ceph_options. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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