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authorDavid Howells <dhowells@redhat.com>2015-01-29 15:02:35 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2015-02-22 19:38:41 +0300
commite36cb0b89ce20b4f8786a57e8a6bc8476f577650 (patch)
tree68adea9f719915013dfd85e9b5872b5bc00b1c70 /fs/jffs2/dir.c
parent2c616d4d88de1dc5b1545eefdc2e291eeb9f2e9d (diff)
downloadlinux-e36cb0b89ce20b4f8786a57e8a6bc8476f577650.tar.xz
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
Convert the following where appropriate: (1) S_ISLNK(dentry->d_inode) to d_is_symlink(dentry). (2) S_ISREG(dentry->d_inode) to d_is_reg(dentry). (3) S_ISDIR(dentry->d_inode) to d_is_dir(dentry). This is actually more complicated than it appears as some calls should be converted to d_can_lookup() instead. The difference is whether the directory in question is a real dir with a ->lookup op or whether it's a fake dir with a ->d_automount op. In some circumstances, we can subsume checks for dentry->d_inode not being NULL into this, provided we the code isn't in a filesystem that expects d_inode to be NULL if the dirent really *is* negative (ie. if we're going to use d_inode() rather than d_backing_inode() to get the inode pointer). Note that the dentry type field may be set to something other than DCACHE_MISS_TYPE when d_inode is NULL in the case of unionmount, where the VFS manages the fall-through from a negative dentry to a lower layer. In such a case, the dentry type of the negative union dentry is set to the same as the type of the lower dentry. However, if you know d_inode is not NULL at the call site, then you can use the d_is_xxx() functions even in a filesystem. There is one further complication: a 0,0 chardev dentry may be labelled DCACHE_WHITEOUT_TYPE rather than DCACHE_SPECIAL_TYPE. Strictly, this was intended for special directory entry types that don't have attached inodes. The following perl+coccinelle script was used: use strict; my @callers; open($fd, 'git grep -l \'S_IS[A-Z].*->d_inode\' |') || die "Can't grep for S_ISDIR and co. callers"; @callers = <$fd>; close($fd); unless (@callers) { print "No matches\n"; exit(0); } my @cocci = ( '@@', 'expression E;', '@@', '', '- S_ISLNK(E->d_inode->i_mode)', '+ d_is_symlink(E)', '', '@@', 'expression E;', '@@', '', '- S_ISDIR(E->d_inode->i_mode)', '+ d_is_dir(E)', '', '@@', 'expression E;', '@@', '', '- S_ISREG(E->d_inode->i_mode)', '+ d_is_reg(E)' ); my $coccifile = "tmp.sp.cocci"; open($fd, ">$coccifile") || die $coccifile; print($fd "$_\n") || die $coccifile foreach (@cocci); close($fd); foreach my $file (@callers) { chomp $file; print "Processing ", $file, "\n"; system("spatch", "--sp-file", $coccifile, $file, "--in-place", "--no-show-diff") == 0 || die "spatch failed"; } [AV: overlayfs parts skipped] Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/jffs2/dir.c')
-rw-r--r--fs/jffs2/dir.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 938556025d64..f21b6fb5e4c4 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -252,7 +252,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
if (!f->inocache)
return -EIO;
- if (S_ISDIR(old_dentry->d_inode->i_mode))
+ if (d_is_dir(old_dentry))
return -EPERM;
/* XXX: This is ugly */
@@ -772,7 +772,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
*/
if (new_dentry->d_inode) {
victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
- if (S_ISDIR(new_dentry->d_inode->i_mode)) {
+ if (d_is_dir(new_dentry)) {
struct jffs2_full_dirent *fd;
mutex_lock(&victim_f->sem);
@@ -807,7 +807,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
if (victim_f) {
/* There was a victim. Kill it off nicely */
- if (S_ISDIR(new_dentry->d_inode->i_mode))
+ if (d_is_dir(new_dentry))
clear_nlink(new_dentry->d_inode);
else
drop_nlink(new_dentry->d_inode);
@@ -815,7 +815,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
inode which didn't exist. */
if (victim_f->inocache) {
mutex_lock(&victim_f->sem);
- if (S_ISDIR(new_dentry->d_inode->i_mode))
+ if (d_is_dir(new_dentry))
victim_f->inocache->pino_nlink = 0;
else
victim_f->inocache->pino_nlink--;
@@ -825,7 +825,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
/* If it was a directory we moved, and there was no victim,
increase i_nlink on its new parent */
- if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
+ if (d_is_dir(old_dentry) && !victim_f)
inc_nlink(new_dir_i);
/* Unlink the original */
@@ -839,7 +839,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
mutex_lock(&f->sem);
inc_nlink(old_dentry->d_inode);
- if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
+ if (f->inocache && !d_is_dir(old_dentry))
f->inocache->pino_nlink++;
mutex_unlock(&f->sem);
@@ -852,7 +852,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
return ret;
}
- if (S_ISDIR(old_dentry->d_inode->i_mode))
+ if (d_is_dir(old_dentry))
drop_nlink(old_dir_i);
new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);