static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
int non_block)
{
struct gfs2_skip_data data;
unsigned long hash = (unsigned long)no_addr;
data.no_addr = no_addr;
data.skipped = 0;
data.non_block = non_block;
return iget5_locked(sb, hash, iget_test, iget_set, &data);
}
static struct inode *get_cramfs_inode(struct super_block *sb,
struct cramfs_inode * cramfs_inode)
{
struct inode *inode = iget5_locked(sb, CRAMINO(cramfs_inode),
cramfs_iget5_test, cramfs_iget5_set,
cramfs_inode);
if (inode && (inode->i_state & I_NEW)) {
unlock_new_inode(inode);
}
return inode;
}
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
int sysfile_type)
{
struct inode *inode = NULL;
struct super_block *sb = osb->sb;
struct ocfs2_find_inode_args args;
trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
sysfile_type);
/* Ok. By now we've either got the offsets passed to us by the
* caller, or we just pulled them off the bh. Lets do some
* sanity checks to make sure they're OK. */
if (blkno == 0) {
inode = ERR_PTR(-EINVAL);
mlog_errno(PTR_ERR(inode));
goto bail;
}
args.fi_blkno = blkno;
args.fi_flags = flags;
args.fi_ino = ino_from_blkno(sb, blkno);
args.fi_sysfile_type = sysfile_type;
inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
ocfs2_init_locked_inode, &args);
/* inode was *not* in the inode cache. 2.6.x requires
* us to do our own read_inode call and unlock it
* afterwards. */
if (inode == NULL) {
inode = ERR_PTR(-ENOMEM);
mlog_errno(PTR_ERR(inode));
goto bail;
}
trace_ocfs2_iget5_locked(inode->i_state);
if (inode->i_state & I_NEW) {
ocfs2_read_locked_inode(inode, &args);
unlock_new_inode(inode);
}
if (is_bad_inode(inode)) {
iput(inode);
inode = ERR_PTR(-ESTALE);
goto bail;
}
bail:
if (!IS_ERR(inode)) {
trace_ocfs2_iget_end(inode,
(unsigned long long)OCFS2_I(inode)->ip_blkno);
}
return inode;
}
/*
* Front-end to lookup the inode-cache maintained by the VFS using the PVFS2
* file handle instead of the inode number.
* Problem with iget() is well-documented in that it can lead to possible
* collissions especially for a file-system with 64 bit handles since inode->i_ino
* is only a scalar field (32 bits). So the trick now is to use iget4_locked (OR) iget5_locked
* if the kernel defines one and set inode number to be just a hash for the
* handle
* @sb: the file system super block instance
* @ref: The PVFS2 object for which we are trying to locate an inode structure
* @keep_locked : indicates whether the inode must be simply allocated and not filled
* in with the results from a ->getattr. i.e. if keep_locked is set to 0, we do a getattr() and
* unlock the inode and if set to 1, we do not issue a getattr() and keep it locked
*
* Boy, this function is so ugly with all these macros. I wish I could find a better
* way to reduce the macro clutter.
*/
struct inode *pvfs2_iget_common(struct super_block *sb, PVFS_object_ref *ref, int keep_locked)
{
struct inode *inode = NULL;
unsigned long hash;
#if defined(HAVE_IGET5_LOCKED) || defined(HAVE_IGET4_LOCKED)
hash = pvfs2_handle_hash(ref);
#if defined(HAVE_IGET5_LOCKED)
inode = iget5_locked(sb, hash, pvfs2_test_inode, pvfs2_set_inode, ref);
#elif defined(HAVE_IGET4_LOCKED)
inode = iget4_locked(sb, hash, pvfs2_test_inode, ref);
#endif
#else
hash = (unsigned long) ref->handle;
#ifdef HAVE_IGET_LOCKED
inode = iget_locked(sb, hash);
#else
/* iget() internally issues a call to read_inode() */
inode = iget(sb, hash);
#endif
#endif
if (!keep_locked)
{
#if defined(HAVE_IGET5_LOCKED) || defined(HAVE_IGET4_LOCKED) || defined(HAVE_IGET_LOCKED)
if (inode && (inode->i_state & I_NEW))
{
inode->i_ino = hash; /* needed for stat etc */
/* iget4_locked and iget_locked dont invoke the set_inode callback.
* So we work around that by stashing the pvfs object reference
* in the inode specific private part for 2.4 kernels and invoking
* the setcallback explicitly for 2.6 kernels.
*/
#if defined(HAVE_IGET4_LOCKED) || defined(HAVE_IGET_LOCKED)
if (PVFS2_I(inode)) {
pvfs2_set_inode(inode, ref);
}
else {
#ifdef PVFS2_LINUX_KERNEL_2_4
inode->u.generic_ip = (void *) ref;
#endif
}
#endif
/* issue a call to read the inode */
pvfs2_read_inode(inode);
unlock_new_inode(inode);
}
#endif
}
gossip_debug(GOSSIP_INODE_DEBUG, "iget handle %llu, fsid %d hash %ld i_ino %lu\n",
ref->handle, ref->fs_id, hash, inode->i_ino);
return inode;
}
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags)
{
struct inode *inode = NULL;
struct super_block *sb = osb->sb;
struct ocfs2_find_inode_args args;
mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
/* Ok. By now we've either got the offsets passed to us by the
* caller, or we just pulled them off the bh. Lets do some
* sanity checks to make sure they're OK. */
if (blkno == 0) {
inode = ERR_PTR(-EINVAL);
mlog_errno(PTR_ERR(inode));
goto bail;
}
args.fi_blkno = blkno;
args.fi_flags = flags;
args.fi_ino = ino_from_blkno(sb, blkno);
inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
ocfs2_init_locked_inode, &args);
/* inode was *not* in the inode cache. 2.6.x requires
* us to do our own read_inode call and unlock it
* afterwards. */
if (inode && inode->i_state & I_NEW) {
mlog(0, "Inode was not in inode cache, reading it.\n");
ocfs2_read_locked_inode(inode, &args);
unlock_new_inode(inode);
}
if (inode == NULL) {
inode = ERR_PTR(-ENOMEM);
mlog_errno(PTR_ERR(inode));
goto bail;
}
if (is_bad_inode(inode)) {
iput(inode);
inode = ERR_PTR(-ESTALE);
goto bail;
}
bail:
if (!IS_ERR(inode)) {
mlog(0, "returning inode with number %llu\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno);
mlog_exit_ptr(inode);
}
return inode;
}
static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
{
struct inode *inode;
repeat:
inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
if (!inode)
return inode;
if (is_bad_inode(inode)) {
iput(inode);
goto repeat;
}
return inode;
}
struct inode *ovl_get_inode(struct super_block *sb, struct inode *realinode)
{
struct inode *inode;
inode = iget5_locked(sb, (unsigned long) realinode,
ovl_inode_test, ovl_inode_set, realinode);
if (inode && inode->i_state & I_NEW) {
ovl_fill_inode(inode, realinode->i_mode, realinode->i_rdev);
set_nlink(inode, realinode->i_nlink);
unlock_new_inode(inode);
}
return inode;
}
struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
{
struct inode *inode;
ino_t t = ceph_vino_to_ino(vino);
inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
if (inode == NULL)
return ERR_PTR(-ENOMEM);
if (inode->i_state & I_NEW) {
dout("get_inode created new inode %p %llx.%llx ino %llx\n",
inode, ceph_vinop(inode), (u64)inode->i_ino);
unlock_new_inode(inode);
}
dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
vino.snap, inode);
return inode;
}
/* convert a fid to an inode. */
struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb)
{
struct inode *inode;
unsigned long hash = coda_f2i(fid);
if ( !sb ) {
printk("coda_fid_to_inode: no sb!\n");
return NULL;
}
inode = iget5_locked(sb, hash, 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;
}
static struct inode *get_cramfs_inode(struct super_block *sb,
struct cramfs_inode * cramfs_inode)
{
struct inode *inode = iget5_locked(sb, CRAMINO(cramfs_inode),
cramfs_iget5_test, cramfs_iget5_set,
cramfs_inode);
static struct timespec zerotime;
if (inode && (inode->i_state & I_NEW)) {
inode->i_mode = cramfs_inode->mode;
inode->i_uid = cramfs_inode->uid;
inode->i_size = cramfs_inode->size;
inode->i_blocks = (cramfs_inode->size - 1) / 512 + 1;
inode->i_blksize = PAGE_CACHE_SIZE;
inode->i_gid = cramfs_inode->gid;
/* Struct copy intentional */
inode->i_mtime = inode->i_atime = inode->i_ctime = zerotime;
inode->i_ino = CRAMINO(cramfs_inode);
/* inode->i_nlink is left 1 - arguably wrong for directories,
but it's the best we can do without reading the directory
contents. 1 yields the right result in GNU find, even
without -noleaf option. */
if (S_ISREG(inode->i_mode)) {
inode->i_fop = &generic_ro_fops;
inode->i_data.a_ops = &cramfs_aops;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &cramfs_dir_inode_operations;
inode->i_fop = &cramfs_directory_operations;
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &page_symlink_inode_operations;
inode->i_data.a_ops = &cramfs_aops;
} else {
inode->i_size = 0;
inode->i_blocks = 0;
init_special_inode(inode, inode->i_mode,
old_decode_dev(cramfs_inode->size));
}
unlock_new_inode(inode);
}
return inode;
}
static struct inode *__ecryptfs_get_inode(struct inode *lower_inode,
struct super_block *sb)
{
struct inode *inode;
if (lower_inode->i_sb != ecryptfs_superblock_to_lower(sb))
return ERR_PTR(-EXDEV);
if (!igrab(lower_inode))
return ERR_PTR(-ESTALE);
inode = iget5_locked(sb, (unsigned long)lower_inode,
ecryptfs_inode_test, ecryptfs_inode_set,
lower_inode);
if (!inode) {
iput(lower_inode);
return ERR_PTR(-EACCES);
}
if (!(inode->i_state & I_NEW))
iput(lower_inode);
return inode;
}
static struct inode *_scfs_get_inode(struct inode *lower_inode,
struct super_block *sb)
{
struct inode *inode;
if (lower_inode->i_sb != SCFS_S(sb)->lower_sb)
return ERR_PTR(-EXDEV);
if (!igrab(lower_inode))
return ERR_PTR(-ESTALE);
inode = iget5_locked(sb, (unsigned long)lower_inode->i_ino,
scfs_inode_test, scfs_inode_set,
lower_inode);
if (!inode) {
iput(lower_inode);
return ERR_PTR(-EACCES);
}
if (!(inode->i_state & I_NEW))
iput(lower_inode);
return inode;
}
struct inode *fuse_iget(struct super_block *sb, unsigned long nodeid,
int generation, struct fuse_attr *attr)
{
struct inode *inode;
struct fuse_inode *fi;
struct fuse_conn *fc = get_fuse_conn_super(sb);
int retried = 0;
retry:
inode = iget5_locked(sb, nodeid, fuse_inode_eq, fuse_inode_set, &nodeid);
if (!inode)
return NULL;
if ((inode->i_state & I_NEW)) {
#ifdef KERNEL_2_6_8_PLUS
inode->i_flags |= S_NOATIME|S_NOCMTIME;
#else
inode->i_flags |= S_NOATIME;
#endif
inode->i_generation = generation;
inode->i_data.backing_dev_info = &fc->bdi;
fuse_init_inode(inode, attr);
unlock_new_inode(inode);
} else if ((inode->i_mode ^ attr->mode) & S_IFMT) {
BUG_ON(retried);
/* Inode has changed type, any I/O on the old should fail */
make_bad_inode(inode);
iput(inode);
retried = 1;
goto retry;
}
fi = get_fuse_inode(inode);
fi->nlookup ++;
fuse_change_attributes(inode, attr);
return inode;
}
struct inode *ovl_get_inode(struct dentry *dentry, struct dentry *upperdentry)
{
struct dentry *lowerdentry = ovl_dentry_lower(dentry);
struct inode *realinode = upperdentry ? d_inode(upperdentry) : NULL;
struct inode *inode;
if (!realinode)
realinode = d_inode(lowerdentry);
if (!S_ISDIR(realinode->i_mode) &&
(upperdentry || (lowerdentry && ovl_indexdir(dentry->d_sb)))) {
struct inode *key = d_inode(lowerdentry ?: upperdentry);
unsigned int nlink;
inode = iget5_locked(dentry->d_sb, (unsigned long) key,
ovl_inode_test, ovl_inode_set, key);
if (!inode)
goto out_nomem;
if (!(inode->i_state & I_NEW)) {
/*
* Verify that the underlying files stored in the inode
* match those in the dentry.
*/
if (!ovl_verify_inode(inode, lowerdentry, upperdentry)) {
iput(inode);
inode = ERR_PTR(-ESTALE);
goto out;
}
dput(upperdentry);
goto out;
}
nlink = ovl_get_nlink(lowerdentry, upperdentry,
realinode->i_nlink);
set_nlink(inode, nlink);
} else {
struct inode * coda_iget(struct super_block * sb, struct CodaFid * fid,
struct coda_vattr * attr)
{
struct inode *inode;
struct coda_inode_info *cii;
unsigned long hash = coda_f2i(fid);
inode = iget5_locked(sb, hash, coda_test_inode, coda_set_inode, fid);
if (!inode)
return ERR_PTR(-ENOMEM);
if (inode->i_state & I_NEW) {
cii = ITOC(inode);
/* we still need to set i_ino for things like stat(2) */
inode->i_ino = hash;
cii->c_mapcount = 0;
unlock_new_inode(inode);
}
/* always replace the attributes, type might have changed */
coda_fill_inode(inode, attr);
return inode;
}
struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
int generation, struct fuse_attr *attr,
u64 attr_valid, u64 attr_version)
{
struct inode *inode;
struct fuse_inode *fi;
struct fuse_conn *fc = get_fuse_conn_super(sb);
retry:
inode = iget5_locked(sb, nodeid, fuse_inode_eq, fuse_inode_set, &nodeid);
if (!inode)
return NULL;
if ((inode->i_state & I_NEW)) {
inode->i_flags |= S_NOATIME;
if (!fc->writeback_cache || !S_ISREG(inode->i_mode))
inode->i_flags |= S_NOCMTIME;
inode->i_generation = generation;
inode->i_data.backing_dev_info = &fc->bdi;
fuse_init_inode(inode, attr);
unlock_new_inode(inode);
} else if ((inode->i_mode ^ attr->mode) & S_IFMT) {
/* Inode has changed type, any I/O on the old should fail */
make_bad_inode(inode);
iput(inode);
goto retry;
}
fi = get_fuse_inode(inode);
spin_lock(&fc->lock);
fi->nlookup++;
spin_unlock(&fc->lock);
fuse_change_attributes(inode, attr, attr_valid, attr_version);
return inode;
}
static struct inode *sdcardfskk_iget(struct super_block *sb,
struct inode *lower_inode)
{
struct sdcardfskk_inode_info *info;
struct inode *inode; /* the new inode to return */
int err;
inode = iget5_locked(sb, /* our superblock */
/*
* hashval: we use inode number, but we can
* also use "(unsigned long)lower_inode"
* instead.
*/
lower_inode->i_ino, /* hashval */
sdcardfskk_inode_test, /* inode comparison function */
sdcardfskk_inode_set, /* inode init function */
lower_inode); /* data passed to test+set fxns */
if (!inode) {
err = -EACCES;
iput(lower_inode);
return ERR_PTR(err);
}
/* if found a cached inode, then just return it */
if (!(inode->i_state & I_NEW))
return inode;
/* initialize new inode */
info = SDCARDFSKK_I(inode);
inode->i_ino = lower_inode->i_ino;
if (!igrab(lower_inode)) {
err = -ESTALE;
return ERR_PTR(err);
}
sdcardfskk_set_lower_inode(inode, lower_inode);
inode->i_version++;
/* use different set of inode ops for symlinks & directories */
if (S_ISDIR(lower_inode->i_mode))
inode->i_op = &sdcardfskk_dir_iops;
else if (S_ISLNK(lower_inode->i_mode))
inode->i_op = &sdcardfskk_symlink_iops;
else
inode->i_op = &sdcardfskk_main_iops;
/* use different set of file ops for directories */
if (S_ISDIR(lower_inode->i_mode))
inode->i_fop = &sdcardfskk_dir_fops;
else
inode->i_fop = &sdcardfskk_main_fops;
inode->i_mapping->a_ops = &sdcardfskk_aops;
inode->i_atime.tv_sec = 0;
inode->i_atime.tv_nsec = 0;
inode->i_mtime.tv_sec = 0;
inode->i_mtime.tv_nsec = 0;
inode->i_ctime.tv_sec = 0;
inode->i_ctime.tv_nsec = 0;
/* properly initialize special inodes */
if (S_ISBLK(lower_inode->i_mode) || S_ISCHR(lower_inode->i_mode) ||
S_ISFIFO(lower_inode->i_mode) || S_ISSOCK(lower_inode->i_mode))
init_special_inode(inode, lower_inode->i_mode,
lower_inode->i_rdev);
/* all well, copy inode attributes, don't need to hold i_mutex here */
sdcardfskk_copy_inode_attr(inode, lower_inode);
fsstack_copy_inode_size(inode, lower_inode);
fix_derived_permission(inode);
unlock_new_inode(inode);
return inode;
}
/*
* inode retrieval
*/
inline int afs_iget(struct super_block *sb, struct afs_fid *fid,
struct inode **_inode)
{
struct afs_iget_data data = { .fid = *fid };
struct afs_super_info *as;
struct afs_vnode *vnode;
struct inode *inode;
int ret;
_enter(",{%u,%u,%u},,", fid->vid, fid->vnode, fid->unique);
as = sb->s_fs_info;
data.volume = as->volume;
inode = iget5_locked(sb, fid->vnode, afs_iget5_test, afs_iget5_set,
&data);
if (!inode) {
_leave(" = -ENOMEM");
return -ENOMEM;
}
vnode = AFS_FS_I(inode);
/* deal with an existing inode */
if (!(inode->i_state & I_NEW)) {
ret = afs_vnode_fetch_status(vnode);
if (ret==0)
*_inode = inode;
else
iput(inode);
_leave(" = %d", ret);
return ret;
}
#ifdef AFS_CACHING_SUPPORT
/* set up caching before reading the status, as fetch-status reads the
* first page of symlinks to see if they're really mntpts */
cachefs_acquire_cookie(vnode->volume->cache,
NULL,
vnode,
&vnode->cache);
#endif
/* okay... it's a new inode */
inode->i_flags |= S_NOATIME;
vnode->flags |= AFS_VNODE_CHANGED;
ret = afs_inode_fetch_status(inode);
if (ret<0)
goto bad_inode;
/* success */
unlock_new_inode(inode);
*_inode = inode;
_leave(" = 0 [CB { v=%u x=%lu t=%u }]",
vnode->cb_version,
vnode->cb_timeout.timo_jif,
vnode->cb_type);
return 0;
/* failure */
bad_inode:
make_bad_inode(inode);
unlock_new_inode(inode);
iput(inode);
_leave(" = %d [bad]", ret);
return ret;
} /* end afs_iget() */
/*
* This is our front-end to iget that looks up inodes by file handle
* instead of inode number.
*/
struct inode *
nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
{
struct nfs_find_desc desc = {
.fh = fh,
.fattr = fattr
};
struct inode *inode = ERR_PTR(-ENOENT);
unsigned long hash;
nfs_attr_check_mountpoint(sb, fattr);
if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) &&
!nfs_attr_use_mounted_on_fileid(fattr))
goto out_no_inode;
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
goto out_no_inode;
hash = nfs_fattr_to_ino_t(fattr);
inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
if (inode == NULL) {
inode = ERR_PTR(-ENOMEM);
goto out_no_inode;
}
if (inode->i_state & I_NEW) {
struct nfs_inode *nfsi = NFS_I(inode);
unsigned long now = jiffies;
/* We set i_ino for the few things that still rely on it,
* such as stat(2) */
inode->i_ino = hash;
/* We can't support update_atime(), since the server will reset it */
inode->i_flags |= S_NOATIME|S_NOCMTIME;
inode->i_mode = fattr->mode;
if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
&& nfs_server_capable(inode, NFS_CAP_MODE))
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL;
/* Why so? Because we want revalidate for devices/FIFOs, and
* that's precisely what we have in nfs_file_inode_operations.
*/
inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
if (S_ISREG(inode->i_mode)) {
inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
inode->i_data.a_ops = &nfs_file_aops;
inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
inode->i_fop = &nfs_dir_operations;
inode->i_data.a_ops = &nfs_dir_aops;
if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
/* Deal with crossing mountpoints */
if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
inode->i_op = &nfs_referral_inode_operations;
else
inode->i_op = &nfs_mountpoint_inode_operations;
inode->i_fop = NULL;
inode->i_flags |= S_AUTOMOUNT;
}
} else if (S_ISLNK(inode->i_mode))
inode->i_op = &nfs_symlink_inode_operations;
else
init_special_inode(inode, inode->i_mode, fattr->rdev);
memset(&inode->i_atime, 0, sizeof(inode->i_atime));
memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
nfsi->change_attr = 0;
inode->i_size = 0;
inode->i_nlink = 0;
inode->i_uid = -2;
inode->i_gid = -2;
inode->i_blocks = 0;
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
nfsi->read_cache_jiffies = fattr->time_start;
nfsi->attr_gencount = fattr->gencount;
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
inode->i_atime = fattr->atime;
else if (nfs_server_capable(inode, NFS_CAP_ATIME))
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
if (fattr->valid & NFS_ATTR_FATTR_MTIME)
inode->i_mtime = fattr->mtime;
else if (nfs_server_capable(inode, NFS_CAP_MTIME))
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_DATA;
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
inode->i_ctime = fattr->ctime;
else if (nfs_server_capable(inode, NFS_CAP_CTIME))
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL;
if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
nfsi->change_attr = fattr->change_attr;
else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_DATA;
if (fattr->valid & NFS_ATTR_FATTR_SIZE)
inode->i_size = nfs_size_to_loff_t(fattr->size);
else
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_DATA
| NFS_INO_REVAL_PAGECACHE;
if (fattr->valid & NFS_ATTR_FATTR_NLINK)
inode->i_nlink = fattr->nlink;
else if (nfs_server_capable(inode, NFS_CAP_NLINK))
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
if (fattr->valid & NFS_ATTR_FATTR_OWNER)
#ifdef CONFIG_ROOT_NFS_UID
if ((fattr->uid) &&
(fattr->uid == (uid_t) (NFS_CLIENT(inode)->cl_rootuid)))
inode->i_uid = 0;
else
inode->i_uid = fattr->uid;
#else
inode->i_uid = fattr->uid;
#endif
else if (nfs_server_capable(inode, NFS_CAP_OWNER))
nfsi->cache_validity |= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL;
if (fattr->valid & NFS_ATTR_FATTR_GROUP)
#ifdef CONFIG_ROOT_NFS_UID
if ((fattr->gid) &&
(fattr->gid == (gid_t) (NFS_CLIENT(inode)->cl_rootgid)))
inode->i_gid = 0;
else
inode->i_gid = fattr->gid;
#else
inode->i_gid = fattr->gid;
#endif
else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
{
unsigned long hash = (unsigned long)no_addr;
return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
}
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
int sysfile_type)
{
int rc = -ESTALE;
struct inode *inode = NULL;
struct super_block *sb = osb->sb;
struct ocfs2_find_inode_args args;
journal_t *journal = OCFS2_SB(sb)->journal->j_journal;
trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
sysfile_type);
/* Ok. By now we've either got the offsets passed to us by the
* caller, or we just pulled them off the bh. Lets do some
* sanity checks to make sure they're OK. */
if (blkno == 0) {
inode = ERR_PTR(-EINVAL);
mlog_errno(PTR_ERR(inode));
goto bail;
}
args.fi_blkno = blkno;
args.fi_flags = flags;
args.fi_ino = ino_from_blkno(sb, blkno);
args.fi_sysfile_type = sysfile_type;
inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
ocfs2_init_locked_inode, &args);
/* inode was *not* in the inode cache. 2.6.x requires
* us to do our own read_inode call and unlock it
* afterwards. */
if (inode == NULL) {
inode = ERR_PTR(-ENOMEM);
mlog_errno(PTR_ERR(inode));
goto bail;
}
trace_ocfs2_iget5_locked(inode->i_state);
if (inode->i_state & I_NEW) {
rc = ocfs2_read_locked_inode(inode, &args);
unlock_new_inode(inode);
}
if (is_bad_inode(inode)) {
iput(inode);
inode = ERR_PTR(rc);
goto bail;
}
/*
* Set transaction id's of transactions that have to be committed
* to finish f[data]sync. We set them to currently running transaction
* as we cannot be sure that the inode or some of its metadata isn't
* part of the transaction - the inode could have been reclaimed and
* now it is reread from disk.
*/
if (journal) {
transaction_t *transaction;
tid_t tid;
struct ocfs2_inode_info *oi = OCFS2_I(inode);
read_lock(&journal->j_state_lock);
if (journal->j_running_transaction)
transaction = journal->j_running_transaction;
else
transaction = journal->j_committing_transaction;
if (transaction)
tid = transaction->t_tid;
else
tid = journal->j_commit_sequence;
read_unlock(&journal->j_state_lock);
oi->i_sync_tid = tid;
oi->i_datasync_tid = tid;
}
bail:
if (!IS_ERR(inode)) {
trace_ocfs2_iget_end(inode,
(unsigned long long)OCFS2_I(inode)->ip_blkno);
}
return inode;
}
/*
* Create an inode for a dynamic root directory or an autocell dynamic
* automount dir.
*/
struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root)
{
struct afs_iget_data data;
struct afs_super_info *as;
struct afs_vnode *vnode;
struct inode *inode;
static atomic_t afs_autocell_ino;
_enter("");
as = sb->s_fs_info;
if (as->volume) {
data.volume = as->volume;
data.fid.vid = as->volume->vid;
}
if (root) {
data.fid.vnode = 1;
data.fid.unique = 1;
} else {
data.fid.vnode = atomic_inc_return(&afs_autocell_ino);
data.fid.unique = 0;
}
inode = iget5_locked(sb, data.fid.vnode,
afs_iget5_pseudo_dir_test, afs_iget5_set,
&data);
if (!inode) {
_leave(" = -ENOMEM");
return ERR_PTR(-ENOMEM);
}
_debug("GOT INODE %p { ino=%lu, vl=%x, vn=%x, u=%x }",
inode, inode->i_ino, data.fid.vid, data.fid.vnode,
data.fid.unique);
vnode = AFS_FS_I(inode);
/* there shouldn't be an existing inode */
BUG_ON(!(inode->i_state & I_NEW));
inode->i_size = 0;
inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
if (root) {
inode->i_op = &afs_dynroot_inode_operations;
inode->i_fop = &afs_dynroot_file_operations;
} else {
inode->i_op = &afs_autocell_inode_operations;
}
set_nlink(inode, 2);
inode->i_uid = GLOBAL_ROOT_UID;
inode->i_gid = GLOBAL_ROOT_GID;
inode->i_ctime.tv_sec = get_seconds();
inode->i_ctime.tv_nsec = 0;
inode->i_atime = inode->i_mtime = inode->i_ctime;
inode->i_blocks = 0;
inode_set_iversion_raw(inode, 0);
inode->i_generation = 0;
set_bit(AFS_VNODE_PSEUDODIR, &vnode->flags);
if (!root) {
set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
inode->i_flags |= S_AUTOMOUNT;
}
inode->i_flags |= S_NOATIME;
unlock_new_inode(inode);
_leave(" = %p", inode);
return inode;
}
struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root,
unsigned long ino)
{
struct nilfs_iget_args args = {
.ino = ino, .root = root, .cno = 0, .for_gc = 0
};
return ilookup5(sb, ino, nilfs_iget_test, &args);
}
struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root,
unsigned long ino)
{
struct nilfs_iget_args args = {
.ino = ino, .root = root, .cno = 0, .for_gc = 0
};
return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args);
}
struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root,
unsigned long ino)
{
struct inode *inode;
int err;
inode = nilfs_iget_locked(sb, root, ino);
if (unlikely(!inode))
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
err = __nilfs_read_inode(sb, root, ino, inode);
if (unlikely(err)) {
iget_failed(inode);
return ERR_PTR(err);
}
unlock_new_inode(inode);
return inode;
}
struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino,
__u64 cno)
{
struct nilfs_iget_args args = {
.ino = ino, .root = NULL, .cno = cno, .for_gc = 1
};
struct inode *inode;
int err;
inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args);
if (unlikely(!inode))
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
err = nilfs_init_gcinode(inode);
if (unlikely(err)) {
iget_failed(inode);
return ERR_PTR(err);
}
unlock_new_inode(inode);
return inode;
}
void nilfs_write_inode_common(struct inode *inode,
struct nilfs_inode *raw_inode, int has_bmap)
{
struct nilfs_inode_info *ii = NILFS_I(inode);
raw_inode->i_mode = cpu_to_le16(inode->i_mode);
raw_inode->i_uid = cpu_to_le32(inode->i_uid);
raw_inode->i_gid = cpu_to_le32(inode->i_gid);
raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
raw_inode->i_size = cpu_to_le64(inode->i_size);
raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
raw_inode->i_blocks = cpu_to_le64(inode->i_blocks);
raw_inode->i_flags = cpu_to_le32(ii->i_flags);
raw_inode->i_generation = cpu_to_le32(inode->i_generation);
if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) {
struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
/* zero-fill unused portion in the case of super root block */
raw_inode->i_xattr = 0;
raw_inode->i_pad = 0;
memset((void *)raw_inode + sizeof(*raw_inode), 0,
nilfs->ns_inode_size - sizeof(*raw_inode));
}
if (has_bmap)
nilfs_bmap_write(ii->i_bmap, raw_inode);
else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
raw_inode->i_device_code =
cpu_to_le64(huge_encode_dev(inode->i_rdev));
/* When extending inode, nilfs->ns_inode_size should be checked
for substitutions of appended fields */
}
void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh)
{
ino_t ino = inode->i_ino;
struct nilfs_inode_info *ii = NILFS_I(inode);
struct inode *ifile = ii->i_root->ifile;
struct nilfs_inode *raw_inode;
raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh);
if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state))
memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size);
set_bit(NILFS_I_INODE_DIRTY, &ii->i_state);
nilfs_write_inode_common(inode, raw_inode, 0);
/* XXX: call with has_bmap = 0 is a workaround to avoid
deadlock of bmap. This delays update of i_bmap to just
before writing */
nilfs_ifile_unmap_inode(ifile, ino, ibh);
}
#define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */
static void nilfs_truncate_bmap(struct nilfs_inode_info *ii,
unsigned long from)
{
unsigned long b;
int ret;
if (!test_bit(NILFS_I_BMAP, &ii->i_state))
return;
repeat:
ret = nilfs_bmap_last_key(ii->i_bmap, &b);
if (ret == -ENOENT)
return;
else if (ret < 0)
goto failed;
if (b < from)
return;
b -= min_t(unsigned long, NILFS_MAX_TRUNCATE_BLOCKS, b - from);
ret = nilfs_bmap_truncate(ii->i_bmap, b);
nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb);
if (!ret || (ret == -ENOMEM &&
nilfs_bmap_truncate(ii->i_bmap, b) == 0))
goto repeat;
failed:
nilfs_warning(ii->vfs_inode.i_sb, __func__,
"failed to truncate bmap (ino=%lu, err=%d)",
ii->vfs_inode.i_ino, ret);
}
void nilfs_truncate(struct inode *inode)
{
unsigned long blkoff;
unsigned int blocksize;
struct nilfs_transaction_info ti;
struct super_block *sb = inode->i_sb;
struct nilfs_inode_info *ii = NILFS_I(inode);
if (!test_bit(NILFS_I_BMAP, &ii->i_state))
return;
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
return;
blocksize = sb->s_blocksize;
blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits;
nilfs_transaction_begin(sb, &ti, 0); /* never fails */
block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block);
nilfs_truncate_bmap(ii, blkoff);
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
if (IS_SYNC(inode))
nilfs_set_transaction_flag(NILFS_TI_SYNC);
nilfs_mark_inode_dirty(inode);
nilfs_set_file_dirty(inode, 0);
nilfs_transaction_commit(sb);
/* May construct a logical segment and may fail in sync mode.
But truncate has no return value. */
}
/*
* inode retrieval
*/
struct inode *afs_iget(struct super_block *sb, struct key *key,
struct afs_fid *fid, struct afs_file_status *status,
struct afs_callback *cb)
{
struct afs_iget_data data = { .fid = *fid };
struct afs_super_info *as;
struct afs_vnode *vnode;
struct inode *inode;
int ret;
_enter(",{%x:%u.%u},,", fid->vid, fid->vnode, fid->unique);
as = sb->s_fs_info;
data.volume = as->volume;
inode = iget5_locked(sb, fid->vnode, afs_iget5_test, afs_iget5_set,
&data);
if (!inode) {
_leave(" = -ENOMEM");
return ERR_PTR(-ENOMEM);
}
_debug("GOT INODE %p { vl=%x vn=%x, u=%x }",
inode, fid->vid, fid->vnode, fid->unique);
vnode = AFS_FS_I(inode);
/* deal with an existing inode */
if (!(inode->i_state & I_NEW)) {
_leave(" = %p", inode);
return inode;
}
if (!status) {
/* it's a remotely extant inode */
set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
ret = afs_vnode_fetch_status(vnode, NULL, key);
if (ret < 0)
goto bad_inode;
} else {
/* it's an inode we just created */
memcpy(&vnode->status, status, sizeof(vnode->status));
if (!cb) {
/* it's a symlink we just created (the fileserver
* didn't give us a callback) */
vnode->cb_version = 0;
vnode->cb_expiry = 0;
vnode->cb_type = 0;
vnode->cb_expires = get_seconds();
} else {
vnode->cb_version = cb->version;
vnode->cb_expiry = cb->expiry;
vnode->cb_type = cb->type;
vnode->cb_expires = vnode->cb_expiry + get_seconds();
}
}
/* set up caching before mapping the status, as map-status reads the
* first page of symlinks to see if they're really mountpoints */
inode->i_size = vnode->status.size;
#ifdef CONFIG_AFS_FSCACHE
vnode->cache = fscache_acquire_cookie(vnode->volume->cache,
&afs_vnode_cache_index_def,
vnode, true);
#endif
ret = afs_inode_map_status(vnode, key);
if (ret < 0)
goto bad_inode;
/* success */
clear_bit(AFS_VNODE_UNSET, &vnode->flags);
inode->i_flags |= S_NOATIME;
unlock_new_inode(inode);
_leave(" = %p [CB { v=%u t=%u }]", inode, vnode->cb_version, vnode->cb_type);
return inode;
/* failure */
bad_inode:
#ifdef CONFIG_AFS_FSCACHE
fscache_relinquish_cookie(vnode->cache, 0);
vnode->cache = NULL;
#endif
iget_failed(inode);
_leave(" = %d [bad]", ret);
return ERR_PTR(ret);
}
