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fs: provide access to DT-defined mount structures

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Use a devicetree fstab entry node identifier to provide a unique
identifier for a fs_mount_t structure that is defined with everything
necessary to mount the file system associated with a partition.

The fs_mount_t structure will be defined in the implementation for
each file system type.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2020-10-31 16:28:12 -05:00 • committed by Carles Cufí
commit 4080b7727f
2 changed files with 28 additions and 13 deletions
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13
include/devicetree/fixed-partitions.h
View file

@ -79,19 +79,6 @@ extern "C" {
(DT_PARENT(DT_GPARENT(node_id))), \
(DT_GPARENT(node_id)))
/*
* @brief Get the common mount flags for an fstab entry.
* @param node_id the node identifier for a child entry in a
* zephyr,fstab node.
* @return a value suitable for initializing an fs_mount_t flags
* member.
*/
#define DT_FSTAB_ENTRY_MOUNT_FLAGS(node_id) \
((DT_PROP(node_id, automount) ? FS_MOUNT_FLAG_AUTOMOUNT : 0) \
| (DT_PROP(node_id, read_only) ? FS_MOUNT_FLAG_READ_ONLY : 0) \
| (DT_PROP(node_id, no_format) ? FS_MOUNT_FLAG_NO_FORMAT : 0))
/**
* @}
*/

28
include/fs/fs.h
View file

@ -192,6 +192,34 @@ struct fs_statvfs {
* @}
*/
/*
* @brief Get the common mount flags for an fstab entry.
* @param node_id the node identifier for a child entry in a
* zephyr,fstab node.
* @return a value suitable for initializing an fs_mount_t flags
* member.
*/
#define FSTAB_ENTRY_DT_MOUNT_FLAGS(node_id) \
((DT_PROP(node_id, automount) ? FS_MOUNT_FLAG_AUTOMOUNT : 0) \
| (DT_PROP(node_id, read_only) ? FS_MOUNT_FLAG_READ_ONLY : 0) \
| (DT_PROP(node_id, no_format) ? FS_MOUNT_FLAG_NO_FORMAT : 0))
/**
* @brief The name under which a zephyr,fstab entry mount structure is
* defined.
*/
#define FS_FSTAB_ENTRY(node_id) _CONCAT(z_fsmp_, node_id)
/**
* @brief Generate a declaration for the externally defined fstab
* entry.
*
* This will evaluate to the name of a struct fs_mount_t object.
*/
#define FS_FSTAB_DECLARE_ENTRY(node_id) \
extern struct fs_mount_t FS_FSTAB_ENTRY(node_id)
/**
* @brief Open or create file
*