diff options
Diffstat (limited to 'fs/ocfs2/export.c')
-rw-r--r-- | fs/ocfs2/export.c | 84 |
1 files changed, 77 insertions, 7 deletions
diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c index 2f27b33..de3da8e 100644 --- a/fs/ocfs2/export.c +++ b/fs/ocfs2/export.c @@ -31,6 +31,7 @@ #include "ocfs2.h" +#include "alloc.h" #include "dir.h" #include "dlmglue.h" #include "dcache.h" @@ -38,6 +39,7 @@ #include "inode.h" #include "buffer_head_io.h" +#include "suballoc.h" struct ocfs2_inode_handle { @@ -49,29 +51,97 @@ static struct dentry *ocfs2_get_dentry(struct super_block *sb, struct ocfs2_inode_handle *handle) { 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; + } + + 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", blkno); + status = -ESTALE; + goto unlock_nfs_sync; } - inode = ocfs2_iget(OCFS2_SB(sb), handle->ih_blkno, 0, 0); + inode = ocfs2_iget(osb, blkno, 0, 0); - if (IS_ERR(inode)) - return (void *)inode; +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", + blkno, handle->ih_generation); + } + result = ERR_PTR(status); + goto bail; + } + + if (IS_ERR(inode)) { + mlog_errno(PTR_ERR(inode)); + result = (void *)inode; + goto bail; + } + +check_gen: if (handle->ih_generation != inode->i_generation) { iput(inode); - return ERR_PTR(-ESTALE); + mlog(0, "stale inode ino: %llu generation: %u\n", blkno, + handle->ih_generation); + result = ERR_PTR(-ESTALE); + goto bail; } 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; } |