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Diffstat (limited to 'Documentation/filesystems/vfs.txt')
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 0d049202808..f06c91f7a86 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -364,6 +364,8 @@ struct inode_operations { ssize_t (*listxattr) (struct dentry *, char *, size_t); int (*removexattr) (struct dentry *, const char *); void (*truncate_range)(struct inode *, loff_t, loff_t); + struct file *(*open) (struct dentry *, struct file *, + const struct cred *); }; Again, all methods are called without any locks being held, unless @@ -475,6 +477,12 @@ otherwise noted. truncate_range: a method provided by the underlying filesystem to truncate a range of blocks , i.e. punch a hole somewhere in a file. + open: this is an alternative to f_op->open(), the difference is that this + method may return any open file, not necessarily originating from the + same filesystem as the one i_op->open() was called on. It may be useful + for stacking filesystems which want to allow native I/O directly on + underlying files. + The Address Space Object ======================== |