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[PATCH] VFS: pass file pointer to filesystem from ftruncate()

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This patch extends the iattr structure with a file pointer memeber, and adds
an ATTR_FILE validity flag for this member.

This is set if do_truncate() is invoked from ftruncate() or from
do_coredump().

The change is source and binary compatible.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Miklos Szeredi 2005-11-07 00:59:49 -08:00 • committed by Linus Torvalds
parent 481bed4542
commit cc4e69dee4
4 changed files with 18 additions and 6 deletions
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10
fs/open.c
View file

@ -194,7 +194,7 @@ out:
return error;
}
int do_truncate(struct dentry *dentry, loff_t length)
int do_truncate(struct dentry *dentry, loff_t length, struct file *filp)
{
int err;
struct iattr newattrs;
@ -205,6 +205,10 @@ int do_truncate(struct dentry *dentry, loff_t length)
newattrs.ia_size = length;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
if (filp) {
newattrs.ia_file = filp;
newattrs.ia_valid |= ATTR_FILE;
}
down(&dentry->d_inode->i_sem);
err = notify_change(dentry, &newattrs);
@ -262,7 +266,7 @@ static inline long do_sys_truncate(const char __user * path, loff_t length)
error = locks_verify_truncate(inode, NULL, length);
if (!error) {
DQUOT_INIT(inode);
error = do_truncate(nd.dentry, length);
error = do_truncate(nd.dentry, length, NULL);
}
put_write_access(inode);
@ -314,7 +318,7 @@ static inline long do_sys_ftruncate(unsigned int fd, loff_t length, int small)
error = locks_verify_truncate(inode, file, length);
if (!error)
error = do_truncate(dentry, length);
error = do_truncate(dentry, length, file);
out_putf:
fput(file);
out: