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[readdir] convert ext3

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new helper: dir_relax(inode).  Call when you are in location that will
_not_ be invalidated by directory modifications (block boundary, in case
of ext*).  Returns whether the directory has survived (dropping i_mutex
allows rmdir to kill the sucker; if it returns false to us, ->iterate()
is obviously done)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-05-15 21:02:48 -04:00
commit 5ded75ec4c
2 changed files with 70 additions and 93 deletions
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6
include/linux/fs.h
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@ -2725,5 +2725,11 @@ static inline bool dir_emit_dots(struct file *file, struct dir_context *ctx)
}
return true;
}
static inline bool dir_relax(struct inode *inode)
{
mutex_unlock(&inode->i_mutex);
mutex_lock(&inode->i_mutex);
return !IS_DEADDIR(inode);
}
#endif /* _LINUX_FS_H */