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[PATCH] namei cleanup 

Extract common code into inline functions to make reading easier.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Miklos Szeredi 2005-09-06 15:18:21 -07:00 committed by Linus Torvalds
parent e89bbd3a0b
commit 09dd17d3e5
1 changed files with 24 additions and 28 deletions
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52
fs/namei.c
View File

@ -525,6 +525,22 @@ static inline int __do_follow_link(struct path *path, struct nameidata *nd)
return error;
}
static inline void dput_path(struct path *path, struct nameidata *nd)
{
dput(path->dentry);
if (path->mnt != nd->mnt)
mntput(path->mnt);
}
static inline void path_to_nameidata(struct path *path, struct nameidata *nd)
{
dput(nd->dentry);
if (nd->mnt != path->mnt)
mntput(nd->mnt);
nd->mnt = path->mnt;
nd->dentry = path->dentry;
}
/*
* This limits recursive symlink follows to 8, while
* limiting consecutive symlinks to 40.
@ -552,9 +568,7 @@ static inline int do_follow_link(struct path *path, struct nameidata *nd)
nd->depth--;
return err;
loop:
dput(path->dentry);
if (path->mnt != nd->mnt)
mntput(path->mnt);
dput_path(path, nd);
path_release(nd);
return err;
}
@ -813,13 +827,8 @@ static fastcall int __link_path_walk(const char * name, struct nameidata *nd)
err = -ENOTDIR;
if (!inode->i_op)
break;
} else {
dput(nd->dentry);
if (nd->mnt != next.mnt)
mntput(nd->mnt);
nd->mnt = next.mnt;
nd->dentry = next.dentry;
}
} else
path_to_nameidata(&next, nd);
err = -ENOTDIR;
if (!inode->i_op->lookup)
break;
@ -859,13 +868,8 @@ last_component:
if (err)
goto return_err;
inode = nd->dentry->d_inode;
} else {
dput(nd->dentry);
if (nd->mnt != next.mnt)
mntput(nd->mnt);
nd->mnt = next.mnt;
nd->dentry = next.dentry;
}
} else
path_to_nameidata(&next, nd);
err = -ENOENT;
if (!inode)
break;
@ -901,9 +905,7 @@ return_reval:
return_base:
return 0;
out_dput:
dput(next.dentry);
if (nd->mnt != next.mnt)
mntput(next.mnt);
dput_path(&next, nd);
break;
}
path_release(nd);
@ -1507,11 +1509,7 @@ do_last:
if (path.dentry->d_inode->i_op && path.dentry->d_inode->i_op->follow_link)
goto do_link;
dput(nd->dentry);
nd->dentry = path.dentry;
if (nd->mnt != path.mnt)
mntput(nd->mnt);
nd->mnt = path.mnt;
path_to_nameidata(&path, nd);
error = -EISDIR;
if (path.dentry->d_inode && S_ISDIR(path.dentry->d_inode->i_mode))
goto exit;
@ -1522,9 +1520,7 @@ ok:
return 0;
exit_dput:
dput(path.dentry);
if (nd->mnt != path.mnt)
mntput(path.mnt);
dput_path(&path, nd);
exit:
path_release(nd);
return error;