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fsnotify: pass dentry instead of inode data

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Define a new data type to pass for event - FSNOTIFY_EVENT_DENTRY.
Use it to pass the dentry instead of it's ->d_inode where available.

This is needed in preparation to the refactor to retrieve the super
block from the data field.  In some cases (i.e. mkdir in kernfs), the
data inode comes from a negative dentry, such that no super block
information would be available. By receiving the dentry itself, instead
of the inode, fsnotify can derive the super block even on these cases.

Link: https://lore.kernel.org/r/20211025192746.66445-3-krisman@collabora.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
[Expand explanation in commit message]
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Amir Goldstein
2021-10-25 16:27:17 -03:00
committed by Jan Kara
parent 9baf93d68b
commit fd5a3ff49a
2 changed files with 18 additions and 3 deletions
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5
include/linux/fsnotify.h
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@@ -39,8 +39,7 @@ static inline int fsnotify_name(__u32 mask, const void *data, int data_type,
static inline void fsnotify_dirent(struct inode *dir, struct dentry *dentry,
__u32 mask)
{
fsnotify_name(mask, d_inode(dentry), FSNOTIFY_EVENT_INODE,
dir, &dentry->d_name, 0);
fsnotify_name(mask, dentry, FSNOTIFY_EVENT_DENTRY, dir, &dentry->d_name, 0);
}
static inline void fsnotify_inode(struct inode *inode, __u32 mask)
@@ -87,7 +86,7 @@ notify_child:
*/
static inline void fsnotify_dentry(struct dentry *dentry, __u32 mask)
{
fsnotify_parent(dentry, mask, d_inode(dentry), FSNOTIFY_EVENT_INODE);
fsnotify_parent(dentry, mask, dentry, FSNOTIFY_EVENT_DENTRY);
}
static inline int fsnotify_file(struct file *file, __u32 mask)