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fs/nfs/dir.c: switch to passing nd->flags instead of nd wherever possible 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-10 15:36:40 -04:00
parent facc3530fb
commit fa3c56bbda
1 changed files with 19 additions and 32 deletions
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51
fs/nfs/dir.c
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@ -1030,28 +1030,15 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
return 1;
}
/*
* Return the intent data that applies to this particular path component
*
* Note that the current set of intents only apply to the very last
* component of the path and none of them is set before that last
* component.
*/
static inline unsigned int nfs_lookup_check_intent(unsigned int flags,
unsigned int mask)
{
return flags & mask;
}
/*
* Use intent information to check whether or not we're going to do
* an O_EXCL create using this path component.
*/
static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags)
{
if (NFS_PROTO(dir)->version == 2)
return 0;
return nd && nfs_lookup_check_intent(nd->flags, LOOKUP_EXCL);
return flags & LOOKUP_EXCL;
}
/*
@ -1063,20 +1050,18 @@ static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
*
*/
static inline
int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
{
struct nfs_server *server = NFS_SERVER(inode);
if (IS_AUTOMOUNT(inode))
return 0;
/* VFS wants an on-the-wire revalidation */
if (nd->flags & LOOKUP_REVAL)
if (flags & LOOKUP_REVAL)
goto out_force;
/* This is an open(2) */
if (nfs_lookup_check_intent(nd->flags, LOOKUP_OPEN) != 0 &&
!(server->flags & NFS_MOUNT_NOCTO) &&
(S_ISREG(inode->i_mode) ||
S_ISDIR(inode->i_mode)))
if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) &&
(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
goto out_force;
return 0;
out_force:
@ -1092,10 +1077,10 @@ int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
*/
static inline
int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
unsigned int flags)
{
/* Don't revalidate a negative dentry if we're creating a new file */
if (nd != NULL && nfs_lookup_check_intent(nd->flags, LOOKUP_CREATE) != 0)
if (flags & LOOKUP_CREATE)
return 0;
if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG)
return 1;
@ -1115,6 +1100,7 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
*/
static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
{
unsigned int flags = nd->flags;
struct inode *dir;
struct inode *inode;
struct dentry *parent;
@ -1122,7 +1108,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
struct nfs_fattr *fattr = NULL;
int error;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
parent = dget_parent(dentry);
@ -1131,7 +1117,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
inode = dentry->d_inode;
if (!inode) {
if (nfs_neg_need_reval(dir, dentry, nd))
if (nfs_neg_need_reval(dir, dentry, flags))
goto out_bad;
goto out_valid_noent;
}
@ -1147,8 +1133,8 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
goto out_set_verifier;
/* Force a full look up iff the parent directory has changed */
if (!nfs_is_exclusive_create(dir, nd) && nfs_check_verifier(dir, dentry)) {
if (nfs_lookup_verify_inode(inode, nd))
if (!nfs_is_exclusive_create(dir, flags) && nfs_check_verifier(dir, dentry)) {
if (nfs_lookup_verify_inode(inode, flags))
goto out_zap_parent;
goto out_valid;
}
@ -1306,7 +1292,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
* If we're doing an exclusive create, optimize away the lookup
* but don't hash the dentry.
*/
if (nfs_is_exclusive_create(dir, nd)) {
if (nd && nfs_is_exclusive_create(dir, nd->flags)) {
d_instantiate(dentry, NULL);
res = NULL;
goto out;
@ -1507,15 +1493,16 @@ static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
{
unsigned int flags = nd->flags;
struct dentry *parent = NULL;
struct inode *inode;
struct inode *dir;
int ret = 0;
if (nd->flags & LOOKUP_RCU)
if (flags & LOOKUP_RCU)
return -ECHILD;
if (!(nd->flags & LOOKUP_OPEN) || (nd->flags & LOOKUP_DIRECTORY))
if (!(flags & LOOKUP_OPEN) || (flags & LOOKUP_DIRECTORY))
goto no_open;
if (d_mountpoint(dentry))
goto no_open;
@ -1528,7 +1515,7 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
* optimize away revalidation of negative dentries.
*/
if (inode == NULL) {
if (!nfs_neg_need_reval(dir, dentry, nd))
if (!nfs_neg_need_reval(dir, dentry, flags))
ret = 1;
goto out;
}
@ -1537,7 +1524,7 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
if (!S_ISREG(inode->i_mode))
goto no_open_dput;
/* We cannot do exclusive creation on a positive dentry */
if (nd && nd->flags & LOOKUP_EXCL)
if (flags & LOOKUP_EXCL)
goto no_open_dput;
/* Let f_op->open() actually open (and revalidate) the file */