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authorSteven Whitehouse <swhiteho@redhat.com>2006-06-14 15:32:57 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2006-06-14 15:32:57 -0400
commitfeaa7bba026c181ce071d5a4884f7f9dd26207a1 (patch)
treec858deb225917265cb07820730e9764674d133e8 /fs/gfs2/inode.h
parent22da645fd6675b7abc55cf937ddf6132f343e5b9 (diff)
[GFS2] Fix unlinked file handling
This patch fixes the way we have been dealing with unlinked, but still open files. It removes all limits (other than memory for inodes, as per every other filesystem) on numbers of these which we can support on GFS2. It also means that (like other fs) its the responsibility of the last process to close the file to deallocate the storage, rather than the person who did the unlinking. Note that with GFS2, those two events might take place on different nodes. Also there are a number of other changes: o We use the Linux inode subsystem as it was intended to be used, wrt allocating GFS2 inodes o The Linux inode cache is now the point which we use for local enforcement of only holding one copy of the inode in core at once (previous to this we used the glock layer). o We no longer use the unlinked "special" file. We just ignore it completely. This makes unlinking more efficient. o We now use the 4th block allocation state. The previously unused state is used to track unlinked but still open inodes. o gfs2_inoded is no longer needed o Several fields are now no longer needed (and removed) from the in core struct gfs2_inode o Several fields are no longer needed (and removed) from the in core superblock There are a number of future possible optimisations and clean ups which have been made possible by this patch. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.h')
-rw-r--r--fs/gfs2/inode.h32
1 files changed, 9 insertions, 23 deletions
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 5ef21317b2f6..30cfcc10beb2 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -27,32 +27,20 @@ static inline int gfs2_is_dir(struct gfs2_inode *ip)
27 27
28void gfs2_inode_attr_in(struct gfs2_inode *ip); 28void gfs2_inode_attr_in(struct gfs2_inode *ip);
29void gfs2_inode_attr_out(struct gfs2_inode *ip); 29void gfs2_inode_attr_out(struct gfs2_inode *ip);
30struct inode *gfs2_ip2v_lookup(struct gfs2_inode *ip); 30struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum *inum, unsigned type);
31struct inode *gfs2_ip2v(struct gfs2_inode *ip); 31struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum *inum);
32struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum);
33 32
34void gfs2_inode_min_init(struct gfs2_inode *ip, unsigned int type);
35int gfs2_inode_refresh(struct gfs2_inode *ip); 33int gfs2_inode_refresh(struct gfs2_inode *ip);
36 34
37int gfs2_inode_get(struct gfs2_glock *i_gl, 35int gfs2_dinode_dealloc(struct gfs2_inode *inode);
38 const struct gfs2_inum *inum, int create,
39 struct gfs2_inode **ipp);
40void gfs2_inode_hold(struct gfs2_inode *ip);
41void gfs2_inode_put(struct gfs2_inode *ip);
42void gfs2_inode_destroy(struct gfs2_inode *ip, int unlock);
43
44int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul);
45
46int gfs2_change_nlink(struct gfs2_inode *ip, int diff); 36int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
47struct inode *gfs2_lookupi(struct inode *dir, struct qstr *name, int is_root, 37struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
48 struct nameidata *nd); 38 int is_root, struct nameidata *nd);
49struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name, 39struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
50 unsigned int mode); 40 unsigned int mode);
51int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name, 41int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
52 struct gfs2_inode *ip, struct gfs2_unlinked *ul); 42 struct gfs2_inode *ip);
53int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name, 43int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
54 struct gfs2_inode *ip, struct gfs2_unlinked *ul);
55int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name,
56 struct gfs2_inode *ip); 44 struct gfs2_inode *ip);
57int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to); 45int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to);
58int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len); 46int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
@@ -60,8 +48,6 @@ int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
60int gfs2_glock_nq_atime(struct gfs2_holder *gh); 48int gfs2_glock_nq_atime(struct gfs2_holder *gh);
61int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs); 49int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs);
62 50
63void gfs2_try_toss_vnode(struct gfs2_inode *ip);
64
65int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr); 51int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
66 52
67int gfs2_repermission(struct inode *inode, int mask, struct nameidata *nd); 53int gfs2_repermission(struct inode *inode, int mask, struct nameidata *nd);