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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-26 00:23:58 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-26 00:23:58 +0300 |
| commit | 74eca356f6d4429497a097a8ed4dfa76c441bab9 (patch) | |
| tree | 1a10a8e3c322748cdb65a9c31e141344b757df6a /Documentation/filesystems | |
| parent | 89b61ca478dcb66625fb36f3b47ef4e0eae2e461 (diff) | |
| parent | 93a2221c9c1ae32643df67c482dc4c4c591b7514 (diff) | |
| download | linux-74eca356f6d4429497a097a8ed4dfa76c441bab9.tar.xz | |
Merge tag 'ceph-for-6.10-rc1' of https://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov:
"A series from Xiubo that adds support for additional access checks
based on MDS auth caps which were recently made available to clients.
This is needed to prevent scenarios where the MDS quietly discards
updates that a UID-restricted client previously (wrongfully) acked to
the user.
Other than that, just a documentation fixup"
* tag 'ceph-for-6.10-rc1' of https://github.com/ceph/ceph-client:
doc: ceph: update userspace command to get CephFS metadata
ceph: add CEPHFS_FEATURE_MDS_AUTH_CAPS_CHECK feature bit
ceph: check the cephx mds auth access for async dirop
ceph: check the cephx mds auth access for open
ceph: check the cephx mds auth access for setattr
ceph: add ceph_mds_check_access() helper
ceph: save cap_auths in MDS client when session is opened
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/ceph.rst | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/Documentation/filesystems/ceph.rst b/Documentation/filesystems/ceph.rst index 085f309ece60..6d2276a87a5a 100644 --- a/Documentation/filesystems/ceph.rst +++ b/Documentation/filesystems/ceph.rst @@ -67,12 +67,15 @@ Snapshot names have two limitations: more than 255 characters, and `<node-id>` takes 13 characters, the long snapshot names can take as much as 255 - 1 - 1 - 13 = 240. -Ceph also provides some recursive accounting on directories for nested -files and bytes. That is, a 'getfattr -d foo' on any directory in the -system will reveal the total number of nested regular files and -subdirectories, and a summation of all nested file sizes. This makes -the identification of large disk space consumers relatively quick, as -no 'du' or similar recursive scan of the file system is required. +Ceph also provides some recursive accounting on directories for nested files +and bytes. You can run the commands:: + + getfattr -n ceph.dir.rfiles /some/dir + getfattr -n ceph.dir.rbytes /some/dir + +to get the total number of nested files and their combined size, respectively. +This makes the identification of large disk space consumers relatively quick, +as no 'du' or similar recursive scan of the file system is required. Finally, Ceph also allows quotas to be set on any directory in the system. The quota can restrict the number of bytes or the number of files stored |