From: shirish <[email protected]> It is possible that an authenticated user has access to a subdirectory being mounted but does not have access to the share directory at the server to be mounted on a root directory. Create an dummy inode with ROOT_I and continue the mount process.
Signed-off-by: Shirish Pargaonkar <[email protected]> --- fs/cifs/inode.c | 36 ++++++++++++++++++++++++++++++++---- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 41de393..fd5941b 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -889,8 +889,10 @@ inode_has_hashed_dentries(struct inode *inode) spin_lock(&inode->i_lock); hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) { if (!d_unhashed(dentry) || IS_ROOT(dentry)) { - spin_unlock(&inode->i_lock); - return true; + if (!(dentry->d_flags & DCACHE_DISCONNECTED)) { + spin_unlock(&inode->i_lock); + return true; + } } } spin_unlock(&inode->i_lock); @@ -942,6 +944,23 @@ retry_iget5_locked: return inode; } +void +fill_phfattr(struct cifs_fattr *cf, struct super_block *sb) +{ + + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); + + memset(cf, 0, sizeof(*cf)); + cf->cf_uniqueid = ROOT_I; + cf->cf_nlink = 1; + cf->cf_atime = CURRENT_TIME; + cf->cf_ctime = CURRENT_TIME; + cf->cf_mtime = CURRENT_TIME; + cf->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; + cf->cf_uid = cifs_sb->mnt_uid; + cf->cf_gid = cifs_sb->mnt_gid; +} + /* gets root inode */ struct inode *cifs_root_iget(struct super_block *sb) { @@ -950,6 +969,7 @@ struct inode *cifs_root_iget(struct super_block *sb) struct inode *inode = NULL; long rc; struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); + struct cifs_fattr phfattr; xid = get_xid(); if (tcon->unix_ext) @@ -958,8 +978,16 @@ struct inode *cifs_root_iget(struct super_block *sb) rc = cifs_get_inode_info(&inode, "", NULL, sb, xid, NULL); if (!inode) { - inode = ERR_PTR(rc); - goto out; + if (rc == -EACCES) { + fill_phfattr(&phfattr, sb); + inode = cifs_iget(sb, &phfattr); + if (inode) + rc = 0; + } + if (rc) { + inode = ERR_PTR(rc); + goto out; + } } #ifdef CONFIG_CIFS_FSCACHE -- 1.8.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
