#include "ocfs2.h"
+#include "alloc.h"
#include "dir.h"
#include "dlmglue.h"
#include "dcache.h"
#include "inode.h"
#include "buffer_head_io.h"
+#include "suballoc.h"
struct ocfs2_inode_handle
{
u32 ih_generation;
};
-static struct dentry *ocfs2_get_dentry(struct super_block *sb, void *vobjp)
+static struct dentry *ocfs2_get_dentry(struct super_block *sb,
+ struct ocfs2_inode_handle *handle)
{
- struct ocfs2_inode_handle *handle = vobjp;
struct inode *inode;
+ struct ocfs2_super *osb = OCFS2_SB(sb);
+ u64 blkno = handle->ih_blkno;
+ int status, set;
struct dentry *result;
mlog_entry("(0x%p, 0x%p)\n", sb, handle);
- if (handle->ih_blkno == 0) {
- mlog_errno(-ESTALE);
- return ERR_PTR(-ESTALE);
+ if (blkno == 0) {
+ mlog(0, "nfs wants inode with blkno: 0\n");
+ result = ERR_PTR(-ESTALE);
+ goto bail;
+ }
+
+ inode = ocfs2_ilookup(sb, blkno);
+ /*
+ * If the inode exists in memory, we only need to check it's
+ * generation number
+ */
+ if (inode)
+ goto check_gen;
+
+ /*
+ * This will synchronize us against ocfs2_delete_inode() on
+ * all nodes
+ */
+ status = ocfs2_nfs_sync_lock(osb, 1);
+ if (status < 0) {
+ mlog(ML_ERROR, "getting nfs sync lock(EX) failed %d\n", status);
+ goto check_err;
}
- inode = ocfs2_iget(OCFS2_SB(sb), handle->ih_blkno, 0);
+ status = ocfs2_test_inode_bit(osb, blkno, &set);
+ if (status < 0) {
+ if (status == -EINVAL) {
+ /*
+ * The blkno NFS gave us doesn't even show up
+ * as an inode, we return -ESTALE to be
+ * nice
+ */
+ mlog(0, "test inode bit failed %d\n", status);
+ status = -ESTALE;
+ } else {
+ mlog(ML_ERROR, "test inode bit failed %d\n", status);
+ }
+ goto unlock_nfs_sync;
+ }
+
+ /* If the inode allocator bit is clear, this inode must be stale */
+ if (!set) {
+ mlog(0, "inode %llu suballoc bit is clear\n",
+ (unsigned long long)blkno);
+ status = -ESTALE;
+ goto unlock_nfs_sync;
+ }
+
+ inode = ocfs2_iget(osb, blkno, 0, 0);
+
+unlock_nfs_sync:
+ ocfs2_nfs_sync_unlock(osb, 1);
+
+check_err:
+ if (status < 0) {
+ if (status == -ESTALE) {
+ mlog(0, "stale inode ino: %llu generation: %u\n",
+ (unsigned long long)blkno, handle->ih_generation);
+ }
+ result = ERR_PTR(status);
+ goto bail;
+ }
if (IS_ERR(inode)) {
mlog_errno(PTR_ERR(inode));
- return (void *)inode;
+ result = (void *)inode;
+ goto bail;
}
+check_gen:
if (handle->ih_generation != inode->i_generation) {
iput(inode);
- mlog_errno(-ESTALE);
- return ERR_PTR(-ESTALE);
+ mlog(0, "stale inode ino: %llu generation: %u\n",
+ (unsigned long long)blkno, handle->ih_generation);
+ result = ERR_PTR(-ESTALE);
+ goto bail;
}
- result = d_alloc_anon(inode);
-
- if (!result) {
- iput(inode);
- mlog_errno(-ENOMEM);
- return ERR_PTR(-ENOMEM);
- }
- result->d_op = &ocfs2_dentry_ops;
+ result = d_obtain_alias(inode);
+ if (!IS_ERR(result))
+ result->d_op = &ocfs2_dentry_ops;
+ else
+ mlog_errno(PTR_ERR(result));
+bail:
mlog_exit_ptr(result);
return result;
}
int status;
u64 blkno;
struct dentry *parent;
- struct inode *inode;
struct inode *dir = child->d_inode;
- struct buffer_head *dirent_bh = NULL;
- struct ocfs2_dir_entry *dirent;
mlog_entry("(0x%p, '%.*s')\n", child,
child->d_name.len, child->d_name.name);
mlog(0, "find parent of directory %llu\n",
(unsigned long long)OCFS2_I(dir)->ip_blkno);
- status = ocfs2_meta_lock(dir, NULL, NULL, 0);
+ status = ocfs2_inode_lock(dir, NULL, 0);
if (status < 0) {
if (status != -ENOENT)
mlog_errno(status);
goto bail;
}
- status = ocfs2_find_files_on_disk("..", 2, &blkno, dir, &dirent_bh,
- &dirent);
+ status = ocfs2_lookup_ino_from_name(dir, "..", 2, &blkno);
if (status < 0) {
parent = ERR_PTR(-ENOENT);
goto bail_unlock;
}
- inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0);
- if (IS_ERR(inode)) {
- mlog(ML_ERROR, "Unable to create inode %llu\n",
- (unsigned long long)blkno);
- parent = ERR_PTR(-EACCES);
- goto bail_unlock;
- }
-
- parent = d_alloc_anon(inode);
- if (!parent) {
- iput(inode);
- parent = ERR_PTR(-ENOMEM);
- }
-
- parent->d_op = &ocfs2_dentry_ops;
+ parent = d_obtain_alias(ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0));
+ if (!IS_ERR(parent))
+ parent->d_op = &ocfs2_dentry_ops;
bail_unlock:
- ocfs2_meta_unlock(dir, 0);
-
- if (dirent_bh)
- brelse(dirent_bh);
+ ocfs2_inode_unlock(dir, 0);
bail:
mlog_exit_ptr(parent);
return parent;
}
-static int ocfs2_encode_fh(struct dentry *dentry, __be32 *fh, int *max_len,
+static int ocfs2_encode_fh(struct dentry *dentry, u32 *fh_in, int *max_len,
int connectable)
{
struct inode *inode = dentry->d_inode;
int type = 1;
u64 blkno;
u32 generation;
+ __le32 *fh = (__force __le32 *) fh_in;
mlog_entry("(0x%p, '%.*s', 0x%p, %d, %d)\n", dentry,
dentry->d_name.len, dentry->d_name.name,
return type;
}
-static struct dentry *ocfs2_decode_fh(struct super_block *sb, __be32 *fh,
- int fh_len, int fileid_type,
- int (*acceptable)(void *context,
- struct dentry *de),
- void *context)
+static struct dentry *ocfs2_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len, int fh_type)
{
- struct ocfs2_inode_handle handle, parent;
- struct dentry *ret = NULL;
+ struct ocfs2_inode_handle handle;
- mlog_entry("(0x%p, 0x%p, %d, %d, 0x%p, 0x%p)\n",
- sb, fh, fh_len, fileid_type, acceptable, context);
+ if (fh_len < 3 || fh_type > 2)
+ return NULL;
- if (fh_len < 3 || fileid_type > 2)
- goto bail;
-
- if (fileid_type == 2) {
- if (fh_len < 6)
- goto bail;
-
- parent.ih_blkno = (u64)le32_to_cpu(fh[3]) << 32;
- parent.ih_blkno |= (u64)le32_to_cpu(fh[4]);
- parent.ih_generation = le32_to_cpu(fh[5]);
-
- mlog(0, "Decoding parent: blkno: %llu, generation: %u\n",
- (unsigned long long)parent.ih_blkno,
- parent.ih_generation);
- }
-
- handle.ih_blkno = (u64)le32_to_cpu(fh[0]) << 32;
- handle.ih_blkno |= (u64)le32_to_cpu(fh[1]);
- handle.ih_generation = le32_to_cpu(fh[2]);
+ handle.ih_blkno = (u64)le32_to_cpu(fid->raw[0]) << 32;
+ handle.ih_blkno |= (u64)le32_to_cpu(fid->raw[1]);
+ handle.ih_generation = le32_to_cpu(fid->raw[2]);
+ return ocfs2_get_dentry(sb, &handle);
+}
- mlog(0, "Encoding fh: blkno: %llu, generation: %u\n",
- (unsigned long long)handle.ih_blkno, handle.ih_generation);
+static struct dentry *ocfs2_fh_to_parent(struct super_block *sb,
+ struct fid *fid, int fh_len, int fh_type)
+{
+ struct ocfs2_inode_handle parent;
- ret = ocfs2_export_ops.find_exported_dentry(sb, &handle, &parent,
- acceptable, context);
+ if (fh_type != 2 || fh_len < 6)
+ return NULL;
-bail:
- mlog_exit_ptr(ret);
- return ret;
+ parent.ih_blkno = (u64)le32_to_cpu(fid->raw[3]) << 32;
+ parent.ih_blkno |= (u64)le32_to_cpu(fid->raw[4]);
+ parent.ih_generation = le32_to_cpu(fid->raw[5]);
+ return ocfs2_get_dentry(sb, &parent);
}
-struct export_operations ocfs2_export_ops = {
- .decode_fh = ocfs2_decode_fh,
+const struct export_operations ocfs2_export_ops = {
.encode_fh = ocfs2_encode_fh,
-
+ .fh_to_dentry = ocfs2_fh_to_dentry,
+ .fh_to_parent = ocfs2_fh_to_parent,
.get_parent = ocfs2_get_parent,
- .get_dentry = ocfs2_get_dentry,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff