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| author | Dave Chinner <dchinner@redhat.com> | 2013-06-05 12:09:10 +1000 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-06-05 11:26:53 -0500 |
| commit | 5c87d4bc1a86bd6e6754ac3d6e111d776ddcfe57 (patch) | |
| tree | b75f364456b84f72400d20e78701b8d752940f93 /fs/xfs/xfs_acl.h | |
| parent | d3eaace84e40bf946129e516dcbd617173c1cf14 (diff) | |
| download | blackbird-op-linux-5c87d4bc1a86bd6e6754ac3d6e111d776ddcfe57.tar.gz blackbird-op-linux-5c87d4bc1a86bd6e6754ac3d6e111d776ddcfe57.zip | |
xfs: increase number of ACL entries for V5 superblocks
The limit of 25 ACL entries is arbitrary, but baked into the on-disk
format. For version 5 superblocks, increase it to the maximum nuber
of ACLs that can fit into a single xattr.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Mark Tinguely <tinuguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_acl.h')
| -rw-r--r-- | fs/xfs/xfs_acl.h | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h index 39632d941354..4016a567b83c 100644 --- a/fs/xfs/xfs_acl.h +++ b/fs/xfs/xfs_acl.h @@ -22,19 +22,36 @@ struct inode; struct posix_acl; struct xfs_inode; -#define XFS_ACL_MAX_ENTRIES 25 #define XFS_ACL_NOT_PRESENT (-1) /* On-disk XFS access control list structure */ +struct xfs_acl_entry { + __be32 ae_tag; + __be32 ae_id; + __be16 ae_perm; + __be16 ae_pad; /* fill the implicit hole in the structure */ +}; + struct xfs_acl { - __be32 acl_cnt; - struct xfs_acl_entry { - __be32 ae_tag; - __be32 ae_id; - __be16 ae_perm; - } acl_entry[XFS_ACL_MAX_ENTRIES]; + __be32 acl_cnt; + struct xfs_acl_entry acl_entry[0]; }; +/* + * The number of ACL entries allowed is defined by the on-disk format. + * For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is + * limited only by the maximum size of the xattr that stores the information. + */ +#define XFS_ACL_MAX_ENTRIES(mp) \ + (xfs_sb_version_hascrc(&mp->m_sb) \ + ? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \ + sizeof(struct xfs_acl_entry) \ + : 25) + +#define XFS_ACL_MAX_SIZE(mp) \ + (sizeof(struct xfs_acl) + \ + sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp))) + /* On-disk XFS extended attribute names */ #define SGI_ACL_FILE (unsigned char *)"SGI_ACL_FILE" #define SGI_ACL_DEFAULT (unsigned char *)"SGI_ACL_DEFAULT" |
