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From: Jan Harkes <jaharkes@cs.cmu.edu>
To: torvalds@transmeta.com
Subject: [PATCH] iget_locked [3/6]
Date: Fri, 10 May 2002 12:07:41 -0400
Cc: linux-kernel@vger.kernel.org, Alexander Viro <viro@math.psu.edu>,
trond.myklebust@fys.uio.no, reiserfs-dev@namesys.com
Convert existing filesystems (Coda/NFS/ReiserFS) that currently use
iget4 to use iget5_locked.
======
diff -urN iget_locked-2/fs/coda/cnode.c iget_locked-3/fs/coda/cnode.c
--- iget_locked-2/fs/coda/cnode.c Fri May 10 10:32:03 2002
+++ iget_locked-3/fs/coda/cnode.c Fri May 10 10:33:31 2002
@@ -72,13 +72,21 @@
struct coda_vattr * attr)
{
struct inode *inode;
+ struct coda_inode_info *cii;
+ struct coda_sb_info *sbi = coda_sbp(sb);
ino_t ino = coda_f2i(fid);
- inode = iget4(sb, ino, coda_test_inode, coda_set_inode, fid);
+ inode = iget5_locked(sb, ino, coda_test_inode, coda_set_inode, fid);
if (!inode)
return ERR_PTR(-ENOMEM);
+ if (inode->i_state & I_NEW) {
+ cii = ITOC(inode);
+ list_add(&cii->c_cilist, &sbi->sbi_cihead);
+ unlock_new_inode(inode);
+ }
+
/* always replace the attributes, type might have changed */
coda_fill_inode(inode, attr);
return inode;
@@ -141,12 +149,13 @@
}
nr = coda_f2i(fid);
- inode = iget4(sb, nr, coda_test_inode, coda_fail_inode, fid);
- if ( !inode ) {
- printk("coda_fid_to_inode: null from iget, sb %p, nr %ld.\n",
- sb, (long)nr);
+ inode = iget5_locked(sb, nr, coda_test_inode, coda_fail_inode, fid);
+ if ( !inode )
return NULL;
- }
+
+ /* we should never see newly created inodes because we intentionally
+ * fail in the initialization callback */
+ BUG_ON(inode->i_state & I_NEW);
return inode;
}
@@ -156,11 +165,12 @@
{
int error = -ENOMEM;
- *inode = iget(sb, CTL_INO);
- if ( *inode ) {
+ *inode = iget_locked(sb, CTL_INO);
+ if ( *inode && ((*inode)->i_state & I_NEW) ) {
(*inode)->i_op = &coda_ioctl_inode_operations;
(*inode)->i_fop = &coda_ioctl_operations;
(*inode)->i_mode = 0444;
+ unlock_new_inode(*inode);
error = 0;
}
diff -urN iget_locked-2/fs/coda/inode.c iget_locked-3/fs/coda/inode.c
--- iget_locked-2/fs/coda/inode.c Wed Apr 24 21:39:46 2002
+++ iget_locked-3/fs/coda/inode.c Fri May 10 10:33:31 2002
@@ -229,16 +229,9 @@
kfree(sbi);
}
-/* all filling in of inodes postponed until lookup */
static void coda_read_inode(struct inode *inode)
{
- struct coda_sb_info *sbi = coda_sbp(inode->i_sb);
- struct coda_inode_info *cii;
-
- if (!sbi) BUG();
-
- cii = ITOC(inode);
- list_add(&cii->c_cilist, &sbi->sbi_cihead);
+ make_bad_inode(inode);
}
static void coda_clear_inode(struct inode *inode)
diff -urN iget_locked-2/fs/nfs/inode.c iget_locked-3/fs/nfs/inode.c
--- iget_locked-2/fs/nfs/inode.c Fri May 10 10:32:03 2002
+++ iget_locked-3/fs/nfs/inode.c Fri May 10 10:33:31 2002
@@ -664,16 +664,15 @@
ino = nfs_fattr_to_ino_t(fattr);
- if (!(inode = iget4(sb, ino, nfs_find_actor, nfs_init_locked, &desc)))
+ if (!(inode = iget5_locked(sb, ino, nfs_find_actor, nfs_init_locked, &desc)))
goto out_no_inode;
- if (NFS_NEW(inode)) {
+ if (inode->i_state & I_NEW) {
__u64 new_size, new_mtime;
loff_t new_isize;
time_t new_atime;
/* We can't support UPDATE_ATIME(), since the server will reset it */
- NFS_FLAGS(inode) &= ~NFS_INO_NEW;
inode->i_flags |= S_NOATIME;
inode->i_mode = fattr->mode;
/* Why so? Because we want revalidate for devices/FIFOs, and
@@ -721,6 +720,8 @@
NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode);
NFS_ATTRTIMEO_UPDATE(inode) = jiffies;
memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
+
+ unlock_new_inode(inode);
} else
nfs_refresh_inode(inode, fattr);
dprintk("NFS: __nfs_fhget(%s/%Ld ct=%d)\n",
@@ -1241,7 +1242,7 @@
nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
if (!nfsi)
return NULL;
- nfsi->flags = NFS_INO_NEW;
+ nfsi->flags = 0;
nfsi->mm_cred = NULL;
return &nfsi->vfs_inode;
}
diff -urN iget_locked-2/fs/reiserfs/inode.c iget_locked-3/fs/reiserfs/inode.c
--- iget_locked-2/fs/reiserfs/inode.c Fri May 10 10:32:03 2002
+++ iget_locked-3/fs/reiserfs/inode.c Fri May 10 10:33:31 2002
@@ -33,7 +33,7 @@
lock_kernel() ;
/* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
- if (INODE_PKEY(inode)->k_objectid != 0) { /* also handles bad_inode case */
+ if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) { /* also handles bad_inode case */
down (&inode->i_sem);
journal_begin(&th, inode->i_sb, jbegin_count) ;
@@ -1140,26 +1140,20 @@
int reiserfs_init_locked_inode (struct inode * inode, void *p)
{
- struct reiserfs_iget4_args *args = (struct reiserfs_iget4_args *)p ;
+ struct reiserfs_iget_args *args = (struct reiserfs_iget_args *)p ;
INODE_PKEY(inode)->k_dir_id = cpu_to_le32(args->objectid);
return 0;
}
/* looks for stat data in the tree, and fills up the fields of in-core
inode stat data fields */
-void reiserfs_read_inode2 (struct inode * inode, void *p)
+void reiserfs_read_locked_inode (struct inode * inode, struct reiserfs_iget_args *args)
{
INITIALIZE_PATH (path_to_sd);
struct cpu_key key;
- struct reiserfs_iget4_args *args = (struct reiserfs_iget4_args *)p ;
unsigned long dirino;
int retval;
- if (!p) {
- reiserfs_make_bad_inode(inode) ;
- return;
- }
-
dirino = args->objectid ;
/* set version 1, version 2 could be used too, because stat data
@@ -1217,12 +1211,12 @@
}
/**
- * reiserfs_find_actor() - "find actor" reiserfs supplies to iget4().
+ * reiserfs_find_actor() - "find actor" reiserfs supplies to iget5_locked().
*
* @inode: inode from hash table to check
- * @opaque: "cookie" passed to iget4(). This is &reiserfs_iget4_args.
+ * @opaque: "cookie" passed to iget5_locked(). This is &reiserfs_iget_args.
*
- * This function is called by iget4() to distinguish reiserfs inodes
+ * This function is called by iget5_locked() to distinguish reiserfs inodes
* having the same inode numbers. Such inodes can only exist due to some
* error condition. One of them should be bad. Inodes with identical
* inode numbers (objectids) are distinguished by parent directory ids.
@@ -1230,7 +1224,7 @@
*/
int reiserfs_find_actor( struct inode *inode, void *opaque )
{
- struct reiserfs_iget4_args *args;
+ struct reiserfs_iget_args *args;
args = opaque;
/* args is already in CPU order */
@@ -1240,13 +1234,18 @@
struct inode * reiserfs_iget (struct super_block * s, const struct cpu_key * key)
{
struct inode * inode;
- struct reiserfs_iget4_args args ;
+ struct reiserfs_iget_args args ;
args.objectid = key->on_disk_key.k_dir_id ;
- inode = iget4 (s, key->on_disk_key.k_objectid,
+ inode = iget5_locked (s, key->on_disk_key.k_objectid,
reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
if (!inode)
return ERR_PTR(-ENOMEM) ;
+
+ if (inode->i_state & I_NEW) {
+ reiserfs_read_locked_inode(inode, &args);
+ unlock_new_inode(inode);
+ }
if (comp_short_keys (INODE_PKEY (inode), key) || is_bad_inode (inode)) {
/* either due to i/o error or a stale NFS handle */
diff -urN iget_locked-2/fs/reiserfs/super.c iget_locked-3/fs/reiserfs/super.c
--- iget_locked-2/fs/reiserfs/super.c Fri May 10 10:32:03 2002
+++ iget_locked-3/fs/reiserfs/super.c Fri May 10 10:33:31 2002
@@ -485,7 +485,6 @@
alloc_inode: reiserfs_alloc_inode,
destroy_inode: reiserfs_destroy_inode,
read_inode: reiserfs_read_inode,
- read_inode2: reiserfs_read_inode2,
write_inode: reiserfs_write_inode,
dirty_inode: reiserfs_dirty_inode,
delete_inode: reiserfs_delete_inode,
@@ -1007,7 +1006,7 @@
int old_format = 0;
unsigned long blocks;
int jinit_done = 0 ;
- struct reiserfs_iget4_args args ;
+ struct reiserfs_iget_args args ;
struct reiserfs_super_block * rs;
char *jdev_name;
struct reiserfs_sb_info *sbi;
@@ -1070,10 +1069,15 @@
s->s_flags |= MS_RDONLY ;
}
args.objectid = REISERFS_ROOT_PARENT_OBJECTID ;
- root_inode = iget4 (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
+ root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
if (!root_inode) {
printk ("reiserfs_fill_super: get root inode failed\n");
goto error;
+ }
+
+ if (root_inode->i_state & I_NEW) {
+ reiserfs_read_locked_inode(root_inode, &args);
+ unlock_new_inode(root_inode);
}
s->s_root = d_alloc_root(root_inode);
diff -urN iget_locked-2/include/linux/fs.h iget_locked-3/include/linux/fs.h
--- iget_locked-2/include/linux/fs.h Fri May 10 10:33:12 2002
+++ iget_locked-3/include/linux/fs.h Fri May 10 10:33:31 2002
@@ -1248,7 +1248,14 @@
extern struct inode * iget4(struct super_block *, unsigned long, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *);
static inline struct inode *iget(struct super_block *sb, unsigned long ino)
{
- return iget4(sb, ino, NULL, NULL, NULL);
+ struct inode *inode = iget_locked(sb, ino);
+
+ if (inode && (inode->i_state & I_NEW)) {
+ sb->s_op->read_inode(inode);
+ unlock_new_inode(inode);
+ }
+
+ return inode;
}
extern void __iget(struct inode * inode);
diff -urN iget_locked-2/include/linux/nfs_fs.h iget_locked-3/include/linux/nfs_fs.h
--- iget_locked-2/include/linux/nfs_fs.h Sun May 5 15:09:15 2002
+++ iget_locked-3/include/linux/nfs_fs.h Fri May 10 10:45:56 2002
@@ -170,7 +170,6 @@
#define NFS_INO_REVALIDATING 0x0004 /* revalidating attrs */
#define NFS_IS_SNAPSHOT 0x0010 /* a snapshot file */
#define NFS_INO_FLUSH 0x0020 /* inode is due for flushing */
-#define NFS_INO_NEW 0x0040 /* hadn't been filled yet */
static inline struct nfs_inode *NFS_I(struct inode *inode)
{
@@ -208,7 +207,6 @@
#define NFS_FLAGS(inode) (NFS_I(inode)->flags)
#define NFS_REVALIDATING(inode) (NFS_FLAGS(inode) & NFS_INO_REVALIDATING)
#define NFS_STALE(inode) (NFS_FLAGS(inode) & NFS_INO_STALE)
-#define NFS_NEW(inode) (NFS_FLAGS(inode) & NFS_INO_NEW)
#define NFS_FILEID(inode) (NFS_I(inode)->fileid)
diff -urN iget_locked-2/include/linux/reiserfs_fs.h iget_locked-3/include/linux/reiserfs_fs.h
--- iget_locked-2/include/linux/reiserfs_fs.h Fri May 10 10:32:04 2002
+++ iget_locked-3/include/linux/reiserfs_fs.h Fri May 10 10:33:31 2002
@@ -1564,7 +1564,7 @@
#define B_I_POS_UNFM_POINTER(bh,ih,pos) le32_to_cpu(*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)))
#define PUT_B_I_POS_UNFM_POINTER(bh,ih,pos, val) do {*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)) = cpu_to_le32(val); } while (0)
-struct reiserfs_iget4_args {
+struct reiserfs_iget_args {
__u32 objectid ;
} ;
@@ -1819,7 +1819,7 @@
/* inode.c */
void reiserfs_read_inode (struct inode * inode) ;
-void reiserfs_read_inode2(struct inode * inode, void *p) ;
+void reiserfs_read_locked_inode(struct inode * inode, struct reiserfs_iget_args *args) ;
int reiserfs_find_actor(struct inode * inode, void *p) ;
int reiserfs_init_locked_inode(struct inode * inode, void *p) ;
void reiserfs_delete_inode (struct inode * inode);
-
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