Detailed Description

Mounted filesystem.

A superblock represents a mounted filesystem.

Data Structures
struct	superblock_t
	Superblock structure. More...

struct	superblock_ops_t
	Superblock operations structure. More...

Functions
superblock_t *	superblock_new (filesystem_t fs, const superblock_ops_t ops, const dentry_ops_t *dentryOps)
	Create a new superblock.

void	superblock_inc_mount_count (superblock_t *superblock)
	Increment the mount count of a superblock.

void	superblock_dec_mount_count (superblock_t *superblock)
	Decrement the mount count of a superblock.

Function Documentation

Create a new superblock.

This does not add the superblock to the superblock cache, the vfs_mount() function will do that using vfs_add_superblock().

There is no superblock_free() instead use UNREF().

Note that the superblock's root dentry must be created and assigned after calling this function.

Parameters

fs	The filesystem type of the superblock.
ops	The superblock operations, can be NULL.
dentryOps	The dentry operations for dentries in this superblock, can be NULL.

Returns

On success, the new superblock. On failure, returns NULL and errno is set to:

Definition at line 33 of file superblock.c.

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void superblock_inc_mount_count ( superblock_t * superblock )

Increment the mount count of a superblock.

Parameters

superblock Pointer to the superblock.

Definition at line 68 of file superblock.c.

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void superblock_dec_mount_count ( superblock_t * superblock )

Decrement the mount count of a superblock.

If the mount count reaches zero, the unmount operation is called if its not NULL.

Parameters

superblock Pointer to the superblock.

Definition at line 73 of file superblock.c.

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