diff options
| -rw-r--r-- | fs/gfs2/inode.c | 35 | ||||
| -rw-r--r-- | fs/gfs2/ops_inode.c | 23 |
2 files changed, 50 insertions, 8 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 94c3a7d..5a02606 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -248,6 +248,32 @@ fail_iput: goto fail; } +/** + * gfs2_set_nlink - Set the inode's link count based on on-disk info + * @inode: The inode in question + * @nlink: The link count + * + * If the link count has hit zero, it must never be raised, whatever the + * on-disk inode might say. When new struct inodes are created the link + * count is set to 1, so that we can safely use this test even when reading + * in on disk information for the first time. + */ + +static void gfs2_set_nlink(struct inode *inode, u32 nlink) +{ + /* + * We will need to review setting the nlink count here in the + * light of the forthcoming ro bind mount work. This is a reminder + * to do that. + */ + if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) { + if (nlink == 0) + clear_nlink(inode); + else + inode->i_nlink = nlink; + } +} + static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) { const struct gfs2_dinode *str = buf; @@ -269,12 +295,7 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) ip->i_inode.i_uid = be32_to_cpu(str->di_uid); ip->i_inode.i_gid = be32_to_cpu(str->di_gid); - /* - * We will need to review setting the nlink count here in the - * light of the forthcoming ro bind mount work. This is a reminder - * to do that. - */ - ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); + gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink)); i_size_write(&ip->i_inode, be64_to_cpu(str->di_size)); gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); atime.tv_sec = be64_to_cpu(str->di_atime); @@ -484,7 +505,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name, /* Don't create entries in an unlinked directory */ if (!dip->i_inode.i_nlink) - return -EPERM; + return -ENOENT; error = gfs2_dir_check(&dip->i_inode, name, NULL); switch (error) { diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 09e436a..1005f9e 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -162,6 +162,10 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir, if (error) goto out_child; + error = -ENOENT; + if (inode->i_nlink == 0) + goto out_gunlock; + error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC, 0); if (error) goto out_gunlock; @@ -335,6 +339,10 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry) if (error) goto out_child; + error = -ENOENT; + if (ip->i_inode.i_nlink == 0) + goto out_rgrp; + error = gfs2_glock_nq(ghs + 2); /* rgrp */ if (error) goto out_rgrp; @@ -589,6 +597,10 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) if (error) goto out_child; + error = -ENOENT; + if (ip->i_inode.i_nlink == 0) + goto out_rgrp; + error = gfs2_glock_nq(ghs + 2); /* rgrp */ if (error) goto out_rgrp; @@ -792,6 +804,10 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, goto out_gunlock; } + error = -ENOENT; + if (ip->i_inode.i_nlink == 0) + goto out_gunlock; + /* Check out the old directory */ error = gfs2_unlink_ok(odip, &odentry->d_name, ip); @@ -805,6 +821,11 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, if (error) goto out_gunlock; + if (nip->i_inode.i_nlink == 0) { + error = -EAGAIN; + goto out_gunlock; + } + if (S_ISDIR(nip->i_inode.i_mode)) { if (nip->i_entries < 2) { if (gfs2_consist_inode(nip)) @@ -835,7 +856,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, if (odip != ndip) { if (!ndip->i_inode.i_nlink) { - error = -EINVAL; + error = -ENOENT; goto out_gunlock; } if (ndip->i_entries == (u32)-1) { |