- 15 10月, 2009 1 次提交
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由 Sage Weil 提交于
This avoids the fugly pass by reference and makes the code a bit easier to read. Signed-off-by: NSage Weil <sage@newdream.net>
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- 14 10月, 2009 1 次提交
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由 Sage Weil 提交于
This makes it easier for individual message types to indicate their particular encoding, and make future changes backward compatible. Signed-off-by: NSage Weil <sage@newdream.net>
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- 13 10月, 2009 2 次提交
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由 Sage Weil 提交于
Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
This lets us extend the format more easily. Signed-off-by: NSage Weil <sage@newdream.net>
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- 10 10月, 2009 7 次提交
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由 Sage Weil 提交于
This tracks updates to code shared with userspace. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The mon request headers now include session_mon information that must be properly initialized. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
This ensures we don't submit the same request twice if we are kicking a specific osd (as with an osd_reset), or when we hit a transient error and resend. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The peer_reset just takes longer (until we reconnect and discover the osd dropped the session... which it will). Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Return an error and report a corrupt map instead of crying BUG(). Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
If an osd has failed or returned and a request has been sent twice, it's possible to get a reply and unregister the request while the request message is queued for delivery. Since the message references the caller's page vector, we need to revoke it before completing. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The osd request submission path registers the request, drops and retakes the request_mutex, then sends it to the OSD. A racing kick_requests could sent it during that interval, causing the same msg to be sent twice and BUGing in the msgr. Fix by only sending the message if it hasn't been touched by other threads. Signed-off-by: NSage Weil <sage@newdream.net>
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- 09 10月, 2009 1 次提交
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由 Sage Weil 提交于
Be conservative: renew subscription once half the interval has expired. Do not reuse sub expiration to control hunting. Signed-off-by: NSage Weil <sage@newdream.net>
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- 08 10月, 2009 4 次提交
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由 Sage Weil 提交于
A misplaced sizeof() around namelen was throwing things off. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
This avoids a divide by zero when the input and/or map are malformed. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Kill the old git revision; print the ceph version and protocol versions instead. Signed-off-by: NSage Weil <sage@newdream.net>
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- 07 10月, 2009 22 次提交
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由 Sage Weil 提交于
Document files shared between kernel and user code trees. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Kconfig options and Makefile. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Basic state information is available via /sys/kernel/debug/ceph, including instances of the client, fsids, current monitor, mds and osd maps, outstanding server requests, and hooks to adjust debug levels. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
A few Ceph ioctls for getting and setting file layout (striping) parameters, and learning the identity and network address of the OSD a given region of a file is stored on. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Basic NFS re-export support is included. This mostly works. However, Ceph's MDS design precludes the ability to generate a (small) filehandle that will be valid forever, so this is of limited utility. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The msgpool is a basic mempool_t-like structure to preallocate messages we expect to receive over the wire. This ensures we have the necessary memory preallocated to process replies to requests, or to process unsolicited messages from various servers. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
A generic message passing library is used to communicate with all other components in the Ceph file system. The messenger library provides ordered, reliable delivery of messages between two nodes in the system. This implementation is based on TCP. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Ceph snapshots rely on client cooperation in determining which operations apply to which snapshots, and appropriately flushing snapshotted data and metadata back to the OSD and MDS clusters. Because snapshots apply to subtrees of the file hierarchy and can be created at any time, there is a fair bit of bookkeeping required to make this work. Portions of the hierarchy that belong to the same set of snapshots are described by a single 'snap realm.' A 'snap context' describes the set of snapshots that exist for a given file or directory. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The Ceph metadata servers control client access to inode metadata and file data by issuing capabilities, granting clients permission to read and/or write both inode field and file data to OSDs (storage nodes). Each capability consists of a set of bits indicating which operations are allowed. If the client holds a *_SHARED cap, the client has a coherent value that can be safely read from the cached inode. In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the client is allowed to change inode attributes (e.g., file size, mtime), note its dirty state in the ceph_cap, and asynchronously flush that metadata change to the MDS. In the event of a conflicting operation (perhaps by another client), the MDS will revoke the conflicting client capabilities. In order for a client to cache an inode, it must hold a capability with at least one MDS server. When inodes are released, release notifications are batched and periodically sent en masse to the MDS cluster to release server state. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The monitor cluster is responsible for managing cluster membership and state. The monitor client handles what minimal interaction the Ceph client has with it: checking for updated versions of the MDS and OSD maps, getting statfs() information, and unmounting. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
CRUSH is a pseudorandom data distribution function designed to map inputs onto a dynamic hierarchy of devices, while minimizing the extent to which inputs are remapped when the devices are added or removed. It includes some features that are specifically useful for storage, most notably the ability to map each input onto a set of N devices that are separated across administrator-defined failure domains. CRUSH is used to distribute data across the cluster of Ceph storage nodes. More information about CRUSH can be found in this paper: http://www.ssrc.ucsc.edu/Papers/weil-sc06.pdfSigned-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The OSD client is responsible for reading and writing data from/to the object storage pool. This includes determining where objects are stored in the cluster, and ensuring that requests are retried or redirected in the event of a node failure or data migration. If an OSD does not respond before a timeout expires, keepalive messages are sent across the lossless, ordered communications channel to ensure that any break in the TCP is discovered. If the session does reset, a reconnection is attempted and affected requests are resent (by the message transport layer). Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
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: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
The ceph address space methods are concerned primarily with managing the dirty page accounting in the inode, which (among other things) must keep track of which snapshot context each page was dirtied in, and ensure that dirty data is written out to the OSDs in snapshort order. A writepage() on a page that is not currently writeable due to snapshot writeback ordering constraints is ignored (it was presumably called from kswapd). Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
File open and close operations, and read and write methods that ensure we have obtained the proper capabilities from the MDS cluster before performing IO on a file. We take references on held capabilities for the duration of the read/write to avoid prematurely releasing them back to the MDS. We implement two main paths for read and write: one that is buffered (and uses generic_aio_{read,write}), and one that is fully synchronous and blocking (operating either on a __user pointer or, if O_DIRECT, directly on user pages). Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Directory operations, including lookup, are defined here. We take advantage of lookup intents when possible. For the most part, we just need to build the proper requests for the metadata server(s) and pass things off to the mds_client. The results of most operations are normally incorporated into the client's cache when the reply is parsed by ceph_fill_trace(). However, if the MDS replies without a trace (e.g., when retrying an update after an MDS failure recovery), some operation-specific cleanup may be needed. We can validate cached dentries in two ways. A per-dentry lease may be issued by the MDS, or a per-directory cap may be issued that acts as a lease on the entire directory. In the latter case, a 'gen' value is used to determine which dentries belong to the currently leased directory contents. We normally prepopulate the dcache and icache with readdir results. This makes subsequent lookups and getattrs avoid any server interaction. It also lets us satisfy readdir operation by peeking at the dcache IFF we hold the per-directory cap/lease, previously performed a readdir, and haven't dropped any of the resulting dentries. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Inode cache and inode operations. We also include routines to incorporate metadata structures returned by the MDS into the client cache, and some helpers to deal with file capabilities and metadata leases. The bulk of that work is done by fill_inode() and fill_trace(). Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Mount option parsing, client setup and teardown, and a few odds and ends (e.g., statfs). Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
struct ceph_buffer is a simple ref-counted buffer. We transparently choose between kmalloc for small buffers and vmalloc for large ones. This is currently used only for allocating memory for xattr data. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
We first define constants, types, and prototypes for the kernel client proper. A few subsystems are defined separately later: the MDS, OSD, and monitor clients, and the messaging layer. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
These headers describe the types used to exchange messages between the Ceph client and various servers. All types are little-endian and packed. These headers are shared between the kernel and userspace, so all types are in terms of e.g. __u32. Additionally, we define a few magic values to identify the current version of the protocol(s) in use, so that discrepancies to be detected on mount. Signed-off-by: NSage Weil <sage@newdream.net>
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由 Sage Weil 提交于
Mount options, syntax. Signed-off-by: NSage Weil <sage@newdream.net>
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- 28 9月, 2009 2 次提交
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由 Linus Torvalds 提交于
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由 Linus Torvalds 提交于
.. duplicated by merging the same fix twice, for details see commit 0d9df251 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes") Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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