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linux/fs/ceph/mdsmap.c

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License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 14:07:57 +00:00
// SPDX-License-Identifier: GPL-2.0
ceph: factor out libceph from Ceph file system This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
2010-04-06 22:14:15 +00:00
#include <linux/ceph/ceph_debug.h>
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/types.h>
ceph: factor out libceph from Ceph file system This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
2010-04-06 22:14:15 +00:00
#include <linux/ceph/mdsmap.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/decode.h>
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
#include "super.h"
ceph: only choose one MDS who is in up:active state without laggy Even the MDS is in up:active state, but it also maybe laggy. Here will skip the laggy MDSs. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:22 +00:00
#define CEPH_MDS_IS_READY(i, ignore_laggy) \
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
(m->m_info[i].state > 0 && ignore_laggy ? true : !m->m_info[i].laggy)
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
ceph: only choose one MDS who is in up:active state without laggy Even the MDS is in up:active state, but it also maybe laggy. Here will skip the laggy MDSs. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:22 +00:00
static int __mdsmap_get_random_mds(struct ceph_mdsmap *m, bool ignore_laggy)
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
{
int n = 0;
ceph: fix geting random mds from mdsmap For example, if we have 5 mds in the mdsmap and the states are: m_info[5] --> [-1, 1, -1, 1, 1] If we get a random number 1, then we should get the mds index 3 as expected, but actually we will get index 2, which the state is -1. The issue is that the for loop increment will advance past any "up" MDS that was found during the while loop search. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-11 11:51:05 +00:00
int i, j;
ceph: Use pseudo-random numbers to choose mds We don't need to use up entropy to choose an mds, so use prandom_u32() to get a pseudo-random number. Also, we don't need to choose a random mds if only one mds is available, so add special casing for the common case. Fixes http://tracker.ceph.com/issues/3579 Signed-off-by: Sam Lang <sam.lang@inktank.com> Reviewed-by: Greg Farnum <greg@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-04-09 21:49:11 +00:00
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
/* count */
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
for (i = 0; i < m->possible_max_rank; i++)
ceph: only choose one MDS who is in up:active state without laggy Even the MDS is in up:active state, but it also maybe laggy. Here will skip the laggy MDSs. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:22 +00:00
if (CEPH_MDS_IS_READY(i, ignore_laggy))
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
n++;
if (n == 0)
return -1;
/* pick */
ceph: Use pseudo-random numbers to choose mds We don't need to use up entropy to choose an mds, so use prandom_u32() to get a pseudo-random number. Also, we don't need to choose a random mds if only one mds is available, so add special casing for the common case. Fixes http://tracker.ceph.com/issues/3579 Signed-off-by: Sam Lang <sam.lang@inktank.com> Reviewed-by: Greg Farnum <greg@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-04-09 21:49:11 +00:00
n = prandom_u32() % n;
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
for (j = 0, i = 0; i < m->possible_max_rank; i++) {
ceph: only choose one MDS who is in up:active state without laggy Even the MDS is in up:active state, but it also maybe laggy. Here will skip the laggy MDSs. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:22 +00:00
if (CEPH_MDS_IS_READY(i, ignore_laggy))
ceph: fix geting random mds from mdsmap For example, if we have 5 mds in the mdsmap and the states are: m_info[5] --> [-1, 1, -1, 1, 1] If we get a random number 1, then we should get the mds index 3 as expected, but actually we will get index 2, which the state is -1. The issue is that the for loop increment will advance past any "up" MDS that was found during the while loop search. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-11 11:51:05 +00:00
j++;
if (j > n)
break;
}
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
return i;
}
ceph: only choose one MDS who is in up:active state without laggy Even the MDS is in up:active state, but it also maybe laggy. Here will skip the laggy MDSs. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:22 +00:00
/*
* choose a random mds that is "up" (i.e. has a state > 0), or -1.
*/
int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
{
int mds;
mds = __mdsmap_get_random_mds(m, false);
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
if (mds == m->possible_max_rank || mds == -1)
ceph: only choose one MDS who is in up:active state without laggy Even the MDS is in up:active state, but it also maybe laggy. Here will skip the laggy MDSs. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:22 +00:00
mds = __mdsmap_get_random_mds(m, true);
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
return mds == m->possible_max_rank ? -1 : mds;
ceph: only choose one MDS who is in up:active state without laggy Even the MDS is in up:active state, but it also maybe laggy. Here will skip the laggy MDSs. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:22 +00:00
}
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
#define __decode_and_drop_type(p, end, type, bad) \
do { \
if (*p + sizeof(type) > end) \
goto bad; \
*p += sizeof(type); \
} while (0)
#define __decode_and_drop_set(p, end, type, bad) \
do { \
u32 n; \
size_t need; \
ceph_decode_32_safe(p, end, n, bad); \
need = sizeof(type) * n; \
ceph_decode_need(p, end, need, bad); \
*p += need; \
} while (0)
#define __decode_and_drop_map(p, end, ktype, vtype, bad) \
do { \
u32 n; \
size_t need; \
ceph_decode_32_safe(p, end, n, bad); \
need = (sizeof(ktype) + sizeof(vtype)) * n; \
ceph_decode_need(p, end, need, bad); \
*p += need; \
} while (0)
static int __decode_and_drop_compat_set(void **p, void* end)
{
int i;
/* compat, ro_compat, incompat*/
for (i = 0; i < 3; i++) {
u32 n;
ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
/* mask */
*p += sizeof(u64);
/* names (map<u64, string>) */
n = ceph_decode_32(p);
while (n-- > 0) {
u32 len;
ceph_decode_need(p, end, sizeof(u64) + sizeof(u32),
bad);
*p += sizeof(u64);
len = ceph_decode_32(p);
ceph_decode_need(p, end, len, bad);
*p += len;
}
}
return 0;
bad:
return -1;
}
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
/*
* Decode an MDS map
*
* Ignore any fields we don't care about (there are quite a few of
* them).
*/
libceph, ceph: get and handle cluster maps with addrvecs In preparation for msgr2, make the cluster send us maps with addrvecs including both LEGACY and MSGR2 addrs instead of a single LEGACY addr. This means advertising support for SERVER_NAUTILUS and also some older features: SERVER_MIMIC, MONENC and MONNAMES. MONNAMES and MONENC are actually pre-argonaut, we just never updated ceph_monmap_decode() for them. Decoding is unconditional, see commit 23c625ce3065 ("libceph: assume argonaut on the server side"). SERVER_MIMIC doesn't bear any meaning for the kernel client. Since ceph_decode_entity_addrvec() is guarded by encoding version checks (and in msgr2 case it is guarded implicitly by the fact that server is speaking msgr2), we assume MSG_ADDR2 for it. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-10-30 12:30:51 +00:00
struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end, bool msgr2)
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
{
struct ceph_mdsmap *m;
ceph: hex dump corrupt server data to KERN_DEBUG Also, print fsid using standard format, NOT hex dump. Signed-off-by: Sage Weil <sage@newdream.net>
2009-12-14 23:13:47 +00:00
const void *start = *p;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
int i, j, n;
ceph: have MDS map decoding use entity_addr_t decoder Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-06-04 15:26:36 +00:00
int err;
ceph: remove unused variables in ceph_mdsmap_decode() Fix build warnings: fs/ceph/mdsmap.c: In function ‘ceph_mdsmap_decode’: fs/ceph/mdsmap.c:192:7: warning: variable ‘info_cv’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:177:7: warning: variable ‘state_seq’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:123:15: warning: variable ‘mdsmap_cv’ set but not used [-Wunused-but-set-variable] Note that p is increased in ceph_decode_*. Signed-off-by: Jia Yang <jiayang5@huawei.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-07-23 02:25:52 +00:00
u8 mdsmap_v;
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
u16 mdsmap_ev;
ceph: reconnect to the export targets on new mdsmaps In the case where the export MDS has crashed just after the EImportStart journal is flushed, a standby MDS takes over for it and when replaying the EImportStart journal the MDS will wait the client to reconnect. That may never happen because the client may not have registered or opened the sessions yet. When receiving a new map, ensure we reconnect to valid export targets as well if their sessions don't exist yet. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-08-18 01:31:19 +00:00
u32 target;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
m = kzalloc(sizeof(*m), GFP_NOFS);
ceph: adjust 36 checks for NULL pointers The script “checkpatch.pl” pointed information out like the following. Comparison to NULL could be written ... Thus fix the affected source code places. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Yan, Zheng <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-08-20 18:22:02 +00:00
if (!m)
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
return ERR_PTR(-ENOMEM);
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
ceph_decode_need(p, end, 1 + 1, bad);
mdsmap_v = ceph_decode_8(p);
ceph: remove unused variables in ceph_mdsmap_decode() Fix build warnings: fs/ceph/mdsmap.c: In function ‘ceph_mdsmap_decode’: fs/ceph/mdsmap.c:192:7: warning: variable ‘info_cv’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:177:7: warning: variable ‘state_seq’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:123:15: warning: variable ‘mdsmap_cv’ set but not used [-Wunused-but-set-variable] Note that p is increased in ceph_decode_*. Signed-off-by: Jia Yang <jiayang5@huawei.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-07-23 02:25:52 +00:00
*p += sizeof(u8); /* mdsmap_cv */
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
if (mdsmap_v >= 4) {
u32 mdsmap_len;
ceph_decode_32_safe(p, end, mdsmap_len, bad);
if (end < *p + mdsmap_len)
goto bad;
end = *p + mdsmap_len;
ceph: update support for PGID64, PGPOOL3, OSDENC protocol features Support (and require) the PGID64, PGPOOL3, and OSDENC protocol features. These have been present in ceph.git since v0.42, Feb 2012. Require these features to simplify support; nobody is running older userspace. Note that the new request and reply encoding is still not in place, so the new code is not yet functional. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-23 18:41:09 +00:00
}
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
ceph_decode_need(p, end, 8*sizeof(u32) + sizeof(u64), bad);
ceph: convert encode/decode macros to inlines This avoids the fugly pass by reference and makes the code a bit easier to read. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-14 16:59:09 +00:00
m->m_epoch = ceph_decode_32(p);
m->m_client_epoch = ceph_decode_32(p);
m->m_last_failure = ceph_decode_32(p);
m->m_root = ceph_decode_32(p);
m->m_session_timeout = ceph_decode_32(p);
m->m_session_autoclose = ceph_decode_32(p);
m->m_max_file_size = ceph_decode_64(p);
m->m_max_mds = ceph_decode_32(p);
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
/*
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
* pick out the active nodes as the m_num_active_mds, the
* m_num_active_mds maybe larger than m_max_mds when decreasing
* the max_mds in cluster side, in other case it should less
* than or equal to m_max_mds.
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
*/
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
m->m_num_active_mds = n = ceph_decode_32(p);
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
/*
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
* the possible max rank, it maybe larger than the m_num_active_mds,
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
* for example if the mds_max == 2 in the cluster, when the MDS(0)
* was laggy and being replaced by a new MDS, we will temporarily
* receive a new mds map with n_num_mds == 1 and the active MDS(1),
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
* and the mds rank >= m_num_active_mds.
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
*/
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
m->possible_max_rank = max(m->m_num_active_mds, m->m_max_mds);
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
m->m_info = kcalloc(m->possible_max_rank, sizeof(*m->m_info), GFP_NOFS);
ceph: adjust 36 checks for NULL pointers The script “checkpatch.pl” pointed information out like the following. Comparison to NULL could be written ... Thus fix the affected source code places. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Yan, Zheng <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-08-20 18:22:02 +00:00
if (!m->m_info)
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
goto nomem;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
/* pick out active nodes from mds_info (state > 0) */
for (i = 0; i < n; i++) {
ceph: decode updated mdsmap format The mds map now uses the global_id as the 'key' (instead of the addr, which was a poor choice). This is protocol change. Signed-off-by: Sage Weil <sage@newdream.net>
2009-11-19 23:31:50 +00:00
u64 global_id;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
u32 namelen;
s32 mds, inc, state;
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
u8 info_v;
void *info_end = NULL;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
struct ceph_entity_addr addr;
u32 num_export_targets;
void *pexport_targets = NULL;
ceph: track laggy state of mds from mdsmap Signed-off-by: Sage Weil <sage@newdream.net>
2010-06-17 21:19:01 +00:00
struct ceph_timespec laggy_since;
ceph: tidy ceph_mdsmap_decode() a little I introduced a new temporary variable "info" instead of "m->m_info[mds]". Also I reversed the if condition and pulled everything in one indent level. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-05-29 11:46:56 +00:00
struct ceph_mds_info *info;
ceph: add more debug info when decoding mdsmap Show the laggy state. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:20 +00:00
bool laggy;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
ceph_decode_need(p, end, sizeof(u64) + 1, bad);
ceph: decode updated mdsmap format The mds map now uses the global_id as the 'key' (instead of the addr, which was a poor choice). This is protocol change. Signed-off-by: Sage Weil <sage@newdream.net>
2009-11-19 23:31:50 +00:00
global_id = ceph_decode_64(p);
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
info_v= ceph_decode_8(p);
if (info_v >= 4) {
u32 info_len;
ceph_decode_need(p, end, 1 + sizeof(u32), bad);
ceph: remove unused variables in ceph_mdsmap_decode() Fix build warnings: fs/ceph/mdsmap.c: In function ‘ceph_mdsmap_decode’: fs/ceph/mdsmap.c:192:7: warning: variable ‘info_cv’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:177:7: warning: variable ‘state_seq’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:123:15: warning: variable ‘mdsmap_cv’ set but not used [-Wunused-but-set-variable] Note that p is increased in ceph_decode_*. Signed-off-by: Jia Yang <jiayang5@huawei.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-07-23 02:25:52 +00:00
*p += sizeof(u8); /* info_cv */
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
info_len = ceph_decode_32(p);
info_end = *p + info_len;
if (info_end > end)
goto bad;
}
ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
ceph: decode updated mdsmap format The mds map now uses the global_id as the 'key' (instead of the addr, which was a poor choice). This is protocol change. Signed-off-by: Sage Weil <sage@newdream.net>
2009-11-19 23:31:50 +00:00
*p += sizeof(u64);
ceph: convert encode/decode macros to inlines This avoids the fugly pass by reference and makes the code a bit easier to read. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-14 16:59:09 +00:00
namelen = ceph_decode_32(p); /* skip mds name */
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
*p += namelen;
libceph, ceph: get and handle cluster maps with addrvecs In preparation for msgr2, make the cluster send us maps with addrvecs including both LEGACY and MSGR2 addrs instead of a single LEGACY addr. This means advertising support for SERVER_NAUTILUS and also some older features: SERVER_MIMIC, MONENC and MONNAMES. MONNAMES and MONENC are actually pre-argonaut, we just never updated ceph_monmap_decode() for them. Decoding is unconditional, see commit 23c625ce3065 ("libceph: assume argonaut on the server side"). SERVER_MIMIC doesn't bear any meaning for the kernel client. Since ceph_decode_entity_addrvec() is guarded by encoding version checks (and in msgr2 case it is guarded implicitly by the fact that server is speaking msgr2), we assume MSG_ADDR2 for it. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-10-30 12:30:51 +00:00
ceph_decode_32_safe(p, end, mds, bad);
ceph_decode_32_safe(p, end, inc, bad);
ceph_decode_32_safe(p, end, state, bad);
ceph: remove unused variables in ceph_mdsmap_decode() Fix build warnings: fs/ceph/mdsmap.c: In function ‘ceph_mdsmap_decode’: fs/ceph/mdsmap.c:192:7: warning: variable ‘info_cv’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:177:7: warning: variable ‘state_seq’ set but not used [-Wunused-but-set-variable] fs/ceph/mdsmap.c:123:15: warning: variable ‘mdsmap_cv’ set but not used [-Wunused-but-set-variable] Note that p is increased in ceph_decode_*. Signed-off-by: Jia Yang <jiayang5@huawei.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-07-23 02:25:52 +00:00
*p += sizeof(u64); /* state_seq */
libceph, ceph: get and handle cluster maps with addrvecs In preparation for msgr2, make the cluster send us maps with addrvecs including both LEGACY and MSGR2 addrs instead of a single LEGACY addr. This means advertising support for SERVER_NAUTILUS and also some older features: SERVER_MIMIC, MONENC and MONNAMES. MONNAMES and MONENC are actually pre-argonaut, we just never updated ceph_monmap_decode() for them. Decoding is unconditional, see commit 23c625ce3065 ("libceph: assume argonaut on the server side"). SERVER_MIMIC doesn't bear any meaning for the kernel client. Since ceph_decode_entity_addrvec() is guarded by encoding version checks (and in msgr2 case it is guarded implicitly by the fact that server is speaking msgr2), we assume MSG_ADDR2 for it. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-10-30 12:30:51 +00:00
if (info_v >= 8)
err = ceph_decode_entity_addrvec(p, end, msgr2, &addr);
else
err = ceph_decode_entity_addr(p, end, &addr);
ceph: have MDS map decoding use entity_addr_t decoder Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-06-04 15:26:36 +00:00
if (err)
goto corrupt;
libceph, ceph: get and handle cluster maps with addrvecs In preparation for msgr2, make the cluster send us maps with addrvecs including both LEGACY and MSGR2 addrs instead of a single LEGACY addr. This means advertising support for SERVER_NAUTILUS and also some older features: SERVER_MIMIC, MONENC and MONNAMES. MONNAMES and MONENC are actually pre-argonaut, we just never updated ceph_monmap_decode() for them. Decoding is unconditional, see commit 23c625ce3065 ("libceph: assume argonaut on the server side"). SERVER_MIMIC doesn't bear any meaning for the kernel client. Since ceph_decode_entity_addrvec() is guarded by encoding version checks (and in msgr2 case it is guarded implicitly by the fact that server is speaking msgr2), we assume MSG_ADDR2 for it. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-10-30 12:30:51 +00:00
ceph_decode_copy_safe(p, end, &laggy_since, sizeof(laggy_since),
bad);
ceph: add more debug info when decoding mdsmap Show the laggy state. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:20 +00:00
laggy = laggy_since.tv_sec != 0 || laggy_since.tv_nsec != 0;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
*p += sizeof(u32);
ceph_decode_32_safe(p, end, namelen, bad);
ceph: fix mdsmap decoding when multiple mds's are present A misplaced sizeof() around namelen was throwing things off. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 23:38:19 +00:00
*p += namelen;
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
if (info_v >= 2) {
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
ceph_decode_32_safe(p, end, num_export_targets, bad);
pexport_targets = *p;
ceph: fix mdsmap decoding when multiple mds's are present A misplaced sizeof() around namelen was throwing things off. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-07 23:38:19 +00:00
*p += num_export_targets * sizeof(u32);
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
} else {
num_export_targets = 0;
}
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
if (info_end && *p != info_end) {
if (*p > info_end)
goto bad;
*p = info_end;
}
ceph: add more debug info when decoding mdsmap Show the laggy state. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:20 +00:00
dout("mdsmap_decode %d/%d %lld mds%d.%d %s %s%s\n",
ceph: factor out libceph from Ceph file system This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
2010-04-06 22:14:15 +00:00
i+1, n, global_id, mds, inc,
libceph: make ceph_pr_addr take an struct ceph_entity_addr pointer GCC9 is throwing a lot of warnings about unaligned accesses by callers of ceph_pr_addr. All of the current callers are passing a pointer to the sockaddr inside struct ceph_entity_addr. Fix it to take a pointer to a struct ceph_entity_addr instead, and then have the function make a copy of the sockaddr before printing it. Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-05-06 13:38:47 +00:00
ceph_pr_addr(&addr),
ceph: add more debug info when decoding mdsmap Show the laggy state. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:20 +00:00
ceph_mds_state_name(state),
laggy ? "(laggy)" : "");
ceph: tidy ceph_mdsmap_decode() a little I introduced a new temporary variable "info" instead of "m->m_info[mds]". Also I reversed the if condition and pulled everything in one indent level. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-05-29 11:46:56 +00:00
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
if (mds < 0 || mds >= m->possible_max_rank) {
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
pr_warn("mdsmap_decode got incorrect mds(%d)\n", mds);
ceph: tidy ceph_mdsmap_decode() a little I introduced a new temporary variable "info" instead of "m->m_info[mds]". Also I reversed the if condition and pulled everything in one indent level. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-05-29 11:46:56 +00:00
continue;
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
}
ceph: tidy ceph_mdsmap_decode() a little I introduced a new temporary variable "info" instead of "m->m_info[mds]". Also I reversed the if condition and pulled everything in one indent level. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-05-29 11:46:56 +00:00
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
if (state <= 0) {
ceph: downgrade warning from mdsmap decode to debug While the MDS cluster is unstable and changing state the client may get mdsmap updates that will trigger warnings: [144692.478400] ceph: mdsmap_decode got incorrect state(up:standby-replay) [144697.489552] ceph: mdsmap_decode got incorrect state(up:standby-replay) [144697.489580] ceph: mdsmap_decode got incorrect state(up:standby-replay) This patch downgrades these warnings to debug, as they may flood the logs if the cluster is unstable for a while. Signed-off-by: Luis Henriques <lhenriques@suse.de> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2020-11-12 11:25:32 +00:00
dout("mdsmap_decode got incorrect state(%s)\n",
ceph_mds_state_name(state));
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
continue;
ceph: allow connecting to mds whose rank >= mdsmap::m_max_mds mdsmap::m_max_mds is the expected count of active mds. It's not the max rank of active mds. User can decrease mdsmap::m_max_mds, but does not stop mds whose rank >= mdsmap::m_max_mds. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-03-28 09:04:13 +00:00
}
ceph: tidy ceph_mdsmap_decode() a little I introduced a new temporary variable "info" instead of "m->m_info[mds]". Also I reversed the if condition and pulled everything in one indent level. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-05-29 11:46:56 +00:00
info = &m->m_info[mds];
info->global_id = global_id;
info->state = state;
info->addr = addr;
ceph: add more debug info when decoding mdsmap Show the laggy state. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:20 +00:00
info->laggy = laggy;
ceph: tidy ceph_mdsmap_decode() a little I introduced a new temporary variable "info" instead of "m->m_info[mds]". Also I reversed the if condition and pulled everything in one indent level. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-05-29 11:46:56 +00:00
info->num_export_targets = num_export_targets;
if (num_export_targets) {
info->export_targets = kcalloc(num_export_targets,
sizeof(u32), GFP_NOFS);
ceph: adjust 36 checks for NULL pointers The script “checkpatch.pl” pointed information out like the following. Comparison to NULL could be written ... Thus fix the affected source code places. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Yan, Zheng <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-08-20 18:22:02 +00:00
if (!info->export_targets)
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
goto nomem;
ceph: reconnect to the export targets on new mdsmaps In the case where the export MDS has crashed just after the EImportStart journal is flushed, a standby MDS takes over for it and when replaying the EImportStart journal the MDS will wait the client to reconnect. That may never happen because the client may not have registered or opened the sessions yet. When receiving a new map, ensure we reconnect to valid export targets as well if their sessions don't exist yet. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-08-18 01:31:19 +00:00
for (j = 0; j < num_export_targets; j++) {
target = ceph_decode_32(&pexport_targets);
info->export_targets[j] = target;
}
ceph: tidy ceph_mdsmap_decode() a little I introduced a new temporary variable "info" instead of "m->m_info[mds]". Also I reversed the if condition and pulled everything in one indent level. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-05-29 11:46:56 +00:00
} else {
info->export_targets = NULL;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
}
}
/* pg_pools */
ceph_decode_32_safe(p, end, n, bad);
m->m_num_data_pg_pools = n;
ceph: update support for PGID64, PGPOOL3, OSDENC protocol features Support (and require) the PGID64, PGPOOL3, and OSDENC protocol features. These have been present in ceph.git since v0.42, Feb 2012. Require these features to simplify support; nobody is running older userspace. Note that the new request and reply encoding is still not in place, so the new code is not yet functional. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-23 18:41:09 +00:00
m->m_data_pg_pools = kcalloc(n, sizeof(u64), GFP_NOFS);
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
if (!m->m_data_pg_pools)
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
goto nomem;
ceph: update support for PGID64, PGPOOL3, OSDENC protocol features Support (and require) the PGID64, PGPOOL3, and OSDENC protocol features. These have been present in ceph.git since v0.42, Feb 2012. Require these features to simplify support; nobody is running older userspace. Note that the new request and reply encoding is still not in place, so the new code is not yet functional. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-23 18:41:09 +00:00
ceph_decode_need(p, end, sizeof(u64)*(n+1), bad);
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
for (i = 0; i < n; i++)
ceph: update support for PGID64, PGPOOL3, OSDENC protocol features Support (and require) the PGID64, PGPOOL3, and OSDENC protocol features. These have been present in ceph.git since v0.42, Feb 2012. Require these features to simplify support; nobody is running older userspace. Note that the new request and reply encoding is still not in place, so the new code is not yet functional. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-23 18:41:09 +00:00
m->m_data_pg_pools[i] = ceph_decode_64(p);
m->m_cas_pg_pool = ceph_decode_64(p);
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
m->m_enabled = m->m_epoch > 1;
mdsmap_ev = 1;
if (mdsmap_v >= 2) {
ceph_decode_16_safe(p, end, mdsmap_ev, bad_ext);
}
if (mdsmap_ev >= 3) {
if (__decode_and_drop_compat_set(p, end) < 0)
goto bad_ext;
}
/* metadata_pool */
if (mdsmap_ev < 5) {
__decode_and_drop_type(p, end, u32, bad_ext);
} else {
__decode_and_drop_type(p, end, u64, bad_ext);
}
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
/* created + modified + tableserver */
__decode_and_drop_type(p, end, struct ceph_timespec, bad_ext);
__decode_and_drop_type(p, end, struct ceph_timespec, bad_ext);
__decode_and_drop_type(p, end, u32, bad_ext);
/* in */
{
int num_laggy = 0;
ceph_decode_32_safe(p, end, n, bad_ext);
ceph_decode_need(p, end, sizeof(u32) * n, bad_ext);
for (i = 0; i < n; i++) {
s32 mds = ceph_decode_32(p);
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
if (mds >= 0 && mds < m->possible_max_rank) {
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
if (m->m_info[mds].laggy)
num_laggy++;
}
}
m->m_num_laggy = num_laggy;
ceph: allow connecting to mds whose rank >= mdsmap::m_max_mds mdsmap::m_max_mds is the expected count of active mds. It's not the max rank of active mds. User can decrease mdsmap::m_max_mds, but does not stop mds whose rank >= mdsmap::m_max_mds. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-03-28 09:04:13 +00:00
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
if (n > m->possible_max_rank) {
ceph: allow connecting to mds whose rank >= mdsmap::m_max_mds mdsmap::m_max_mds is the expected count of active mds. It's not the max rank of active mds. User can decrease mdsmap::m_max_mds, but does not stop mds whose rank >= mdsmap::m_max_mds. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-03-28 09:04:13 +00:00
void *new_m_info = krealloc(m->m_info,
n * sizeof(*m->m_info),
GFP_NOFS | __GFP_ZERO);
if (!new_m_info)
goto nomem;
m->m_info = new_m_info;
}
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
m->possible_max_rank = n;
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
}
/* inc */
__decode_and_drop_map(p, end, u32, u32, bad_ext);
/* up */
__decode_and_drop_map(p, end, u32, u64, bad_ext);
/* failed */
__decode_and_drop_set(p, end, u32, bad_ext);
/* stopped */
__decode_and_drop_set(p, end, u32, bad_ext);
if (mdsmap_ev >= 4) {
/* last_failure_osd_epoch */
__decode_and_drop_type(p, end, u32, bad_ext);
}
if (mdsmap_ev >= 6) {
/* ever_allowed_snaps */
__decode_and_drop_type(p, end, u8, bad_ext);
/* explicitly_allowed_snaps */
__decode_and_drop_type(p, end, u8, bad_ext);
}
if (mdsmap_ev >= 7) {
/* inline_data_enabled */
__decode_and_drop_type(p, end, u8, bad_ext);
}
if (mdsmap_ev >= 8) {
u32 name_len;
/* enabled */
ceph_decode_8_safe(p, end, m->m_enabled, bad_ext);
ceph_decode_32_safe(p, end, name_len, bad_ext);
ceph_decode_need(p, end, name_len, bad_ext);
*p += name_len;
}
/* damaged */
if (mdsmap_ev >= 9) {
size_t need;
ceph_decode_32_safe(p, end, n, bad_ext);
need = sizeof(u32) * n;
ceph_decode_need(p, end, need, bad_ext);
*p += need;
m->m_damaged = n > 0;
} else {
m->m_damaged = false;
}
bad_ext:
ceph: add more debug info when decoding mdsmap Show the laggy state. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:20 +00:00
dout("mdsmap_decode m_enabled: %d, m_damaged: %d, m_num_laggy: %d\n",
!!m->m_enabled, !!m->m_damaged, m->m_num_laggy);
ceph: CEPH_FEATURE_MDSENC support Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-31 07:53:01 +00:00
*p = end;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
dout("mdsmap_decode success epoch %u\n", m->m_epoch);
return m;
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
nomem:
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
err = -ENOMEM;
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
goto out_err;
ceph: have MDS map decoding use entity_addr_t decoder Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-06-04 15:26:36 +00:00
corrupt:
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
pr_err("corrupt mdsmap\n");
ceph: hex dump corrupt server data to KERN_DEBUG Also, print fsid using standard format, NOT hex dump. Signed-off-by: Sage Weil <sage@newdream.net>
2009-12-14 23:13:47 +00:00
print_hex_dump(KERN_DEBUG, "mdsmap: ",
DUMP_PREFIX_OFFSET, 16, 1,
start, end - start, true);
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
out_err:
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
ceph_mdsmap_destroy(m);
ceph: improve error handling in ceph_mdsmap_decode This patch makes the following improvements to the error handling in the ceph_mdsmap_decode function: - Add a NULL check for return value from kcalloc - Make use of the variable err Signed-off-by: Emil Goode <emilgoode@gmail.com> Signed-off-by: Sage Weil <sage@inktank.com>
2013-05-28 14:59:00 +00:00
return ERR_PTR(err);
ceph: have MDS map decoding use entity_addr_t decoder Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-06-04 15:26:36 +00:00
bad:
err = -EINVAL;
goto corrupt;
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
}
void ceph_mdsmap_destroy(struct ceph_mdsmap *m)
{
int i;
ceph: fix possible null-pointer dereference in ceph_mdsmap_decode() kcalloc() is called to allocate memory for m->m_info, and if it fails, ceph_mdsmap_destroy() behind the label out_err will be called: ceph_mdsmap_destroy(m); In ceph_mdsmap_destroy(), m->m_info is dereferenced through: kfree(m->m_info[i].export_targets); To fix this possible null-pointer dereference, check m->m_info before the for loop to free m->m_info[i].export_targets. [ jlayton: fix up whitespace damage only kfree(m->m_info) if it's non-NULL ] Reported-by: TOTE Robot <oslab@tsinghua.edu.cn> Signed-off-by: Tuo Li <islituo@gmail.com> Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2021-08-05 15:14:34 +00:00
if (m->m_info) {
for (i = 0; i < m->possible_max_rank; i++)
kfree(m->m_info[i].export_targets);
kfree(m->m_info);
}
ceph: MDS client The MDS (metadata server) client is responsible for submitting requests to the MDS cluster and parsing the response. We decide which MDS to submit each request to based on cached information about the current partition of the directory hierarchy across the cluster. A stateful session is opened with each MDS before we submit requests to it, and a mutex is used to control the ordering of messages within each session. An MDS request may generate two responses. The first indicates the operation was a success and returns any result. A second reply is sent when the operation commits to disk. Note that locking on the MDS ensures that the results of updates are visible only to the updating client before the operation commits. Requests are linked to the containing directory so that an fsync will wait for them to commit. If an MDS fails and/or recovers, we resubmit requests as needed. We also reconnect existing capabilities to a recovering MDS to reestablish that shared session state. Old dentry leases are invalidated. Signed-off-by: Sage Weil <sage@newdream.net>
2009-10-06 18:31:09 +00:00
kfree(m->m_data_pg_pools);
kfree(m);
}
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m)
{
int i, nr_active = 0;
if (!m->m_enabled)
return false;
if (m->m_damaged)
return false;
ceph: fix mdsmap cluster available check based on laggy number In case the max_mds > 1 in MDS cluster and there is no any standby MDS and all the max_mds MDSs are in up:active state, if one of the up:active MDSs is dead, the m->m_num_laggy in kclient will be 1. Then the mount will fail without considering other healthy MDSs. There manybe some MDSs still "in" the cluster but not in up:active state, we will ignore them. Only when all the up:active MDSs in the cluster are laggy will treat the cluster as not be available. In case decreasing the max_mds, the cluster will not stop the extra up:active MDSs immediately and there will be a latency. During it the up:active MDS number will be larger than the max_mds, so later the m_info memories will 100% be reallocated. Here will pick out the up:active MDSs as the m_num_mds and allocate the needed memories once. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-11-26 12:24:21 +00:00
if (m->m_num_laggy == m->m_num_active_mds)
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
return false;
ceph: add possible_max_rank and make the code more readable The m_num_mds here is actually the number for MDSs which are in up:active status, and it will be duplicated to m_num_active_mds, so remove it. Add possible_max_rank to the mdsmap struct and this will be the correctly possible largest rank boundary. Remove the special case for one mds in __mdsmap_get_random_mds(), because the validate mds rank may not always be 0. Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-12-04 11:57:39 +00:00
for (i = 0; i < m->possible_max_rank; i++) {
ceph: check availability of mds cluster on mount Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-11-10 08:02:06 +00:00
if (m->m_info[i].state == CEPH_MDS_STATE_ACTIVE)
nr_active++;
}
return nr_active > 0;
}
Reference in New Issue Copy Permalink