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authorwanglei <wang840925@gmail.com>2010-08-11 09:38:04 +0100
committerSteve French <sfrench@us.ibm.com>2010-08-11 17:11:29 +0000
commitbec5eb6141308a30a73682330cb045a40e442b8c (patch)
treeae514575d62e65a07d6089746fbd880f816ee382 /fs/afs/internal.h
parent4a2d789267e00b5a1175ecd2ddefcc78b83fbf09 (diff)
downloadlwn-bec5eb6141308a30a73682330cb045a40e442b8c.tar.gz
lwn-bec5eb6141308a30a73682330cb045a40e442b8c.zip
AFS: Implement an autocell mount capability [ver #2]
Implement the ability for the root directory of a mounted AFS filesystem to accept lookups of arbitrary directory names, to interpet the names as the names of cells, to look the cell names up in the DNS for AFSDB records and to mount the root.cell volume of the nominated cell on the pseudo-directory created by lookup. This facility is requested by passing: -o autocell to the mountpoint for which this is desired, usually the /afs mount. To use this facility, a DNS upcall program is required for AFSDB records. This can be obtained from: http://people.redhat.com/~dhowells/afs/dns.afsdb.c It should be compiled with -lresolv and -lkeyutils and installed as, say: /usr/sbin/dns.afsdb Then the following line needs to be added to /sbin/request-key.conf: create dns_resolver afsdb:* * /usr/sbin/dns.afsdb %k This can be tested by mounting AFS, say: insmod dns_resolver.ko insmod af-rxrpc.ko insmod kafs.ko rootcell=grand.central.org mount -t afs "#grand.central.org:root.cell." /afs -o autocell and doing: ls /afs/grand.central.org/ which should show: archive/ cvs/ doc/ local/ project/ service/ software/ user/ www/ if it works. Signed-off-by: Wang Lei <wang840925@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/afs/internal.h')
-rw-r--r--fs/afs/internal.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 8679089ce9a1..ce12a2b06f8f 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -42,6 +42,7 @@ typedef enum {
struct afs_mount_params {
bool rwpath; /* T if the parent should be considered R/W */
bool force; /* T to force cell type */
+ bool autocell; /* T if set auto mount operation */
afs_voltype_t type; /* type of volume requested */
int volnamesz; /* size of volume name */
const char *volname; /* name of volume to mount */
@@ -358,6 +359,8 @@ struct afs_vnode {
#define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */
#define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */
#define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */
+#define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */
+#define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */
long acl_order; /* ACL check count (callback break count) */
@@ -468,8 +471,8 @@ extern struct list_head afs_proc_cells;
#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
extern int afs_cell_init(char *);
-extern struct afs_cell *afs_cell_create(const char *, char *);
-extern struct afs_cell *afs_cell_lookup(const char *, unsigned);
+extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool);
+extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool);
extern struct afs_cell *afs_grab_cell(struct afs_cell *);
extern void afs_put_cell(struct afs_cell *);
extern void afs_cell_purge(void);
@@ -558,6 +561,8 @@ extern int afs_fs_release_lock(struct afs_server *, struct key *,
/*
* inode.c
*/
+extern struct inode *afs_iget_autocell(struct inode *, const char *, int,
+ struct key *);
extern struct inode *afs_iget(struct super_block *, struct key *,
struct afs_fid *, struct afs_file_status *,
struct afs_callback *);
@@ -566,6 +571,7 @@ extern int afs_validate(struct afs_vnode *, struct key *);
extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
extern int afs_setattr(struct dentry *, struct iattr *);
extern void afs_evict_inode(struct inode *);
+extern int afs_drop_inode(struct inode *);
/*
* main.c
@@ -581,6 +587,7 @@ extern int afs_abort_to_error(u32);
* mntpt.c
*/
extern const struct inode_operations afs_mntpt_inode_operations;
+extern const struct inode_operations afs_autocell_inode_operations;
extern const struct file_operations afs_mntpt_file_operations;
extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *);