diff options
Diffstat (limited to 'include/linux/exportfs.h')
-rw-r--r-- | include/linux/exportfs.h | 26 |
1 files changed, 2 insertions, 24 deletions
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h index 0b4a771b4903..51d214138814 100644 --- a/include/linux/exportfs.h +++ b/include/linux/exportfs.h | |||
@@ -55,30 +55,8 @@ struct fid { | |||
55 | * @get_parent: find the parent of a given directory | 55 | * @get_parent: find the parent of a given directory |
56 | * @get_dentry: find a dentry for the inode given a file handle sub-fragment | 56 | * @get_dentry: find a dentry for the inode given a file handle sub-fragment |
57 | * | 57 | * |
58 | * Description: | 58 | * See Documentation/filesystems/Exporting for details on how to use |
59 | * The export_operations structure provides a means for nfsd to communicate | 59 | * this interface correctly. |
60 | * with a particular exported file system - particularly enabling nfsd and | ||
61 | * the filesystem to co-operate when dealing with file handles. | ||
62 | * | ||
63 | * export_operations contains two basic operation for dealing with file | ||
64 | * handles, decode_fh() and encode_fh(), and allows for some other | ||
65 | * operations to be defined which standard helper routines use to get | ||
66 | * specific information from the filesystem. | ||
67 | * | ||
68 | * nfsd encodes information use to determine which filesystem a filehandle | ||
69 | * applies to in the initial part of the file handle. The remainder, termed | ||
70 | * a file handle fragment, is controlled completely by the filesystem. The | ||
71 | * standard helper routines assume that this fragment will contain one or | ||
72 | * two sub-fragments, one which identifies the file, and one which may be | ||
73 | * used to identify the (a) directory containing the file. | ||
74 | * | ||
75 | * In some situations, nfsd needs to get a dentry which is connected into a | ||
76 | * specific part of the file tree. To allow for this, it passes the | ||
77 | * function acceptable() together with a @context which can be used to see | ||
78 | * if the dentry is acceptable. As there can be multiple dentrys for a | ||
79 | * given file, the filesystem should check each one for acceptability before | ||
80 | * looking for the next. As soon as an acceptable one is found, it should | ||
81 | * be returned. | ||
82 | * | 60 | * |
83 | * encode_fh: | 61 | * encode_fh: |
84 | * @encode_fh should store in the file handle fragment @fh (using at most | 62 | * @encode_fh should store in the file handle fragment @fh (using at most |