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exofs: Add SYSFS info for autologin/pNFS export

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Introduce sysfs infrastructure for exofs cluster filesystem.

Each OSD target shows up as below in the sysfs hierarchy:
	/sys/fs/exofs/<osdname>_<partition_id>/devX

Where <osdname>_<partition_id> is the unique identification
of a Superblock.

Where devX: 0 <= X < device_table_size. They are ordered
in device-table order as specified to the mkfs.exofs command

Each OSD device  devX has following attributes :
	osdname - ReadOnly
	systemid - ReadOnly
	uri - Read/Write

It is up to user-mode to update devX/uri for support of
autologin.

These sysfs information are used both for autologin as well
as support for exporting exofs via a pNFSD server in user-mode.
(.eg NFS-Ganesha)

Signed-off-by: Sachin Bhamare <sbhamare@panasas.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
This commit is contained in:
Sachin Bhamare
2012-03-14 18:01:45 -07:00
committed by Boaz Harrosh
parent 6abe4a87f7
commit 8b56a30caa
4 changed files with 229 additions and 1 deletions
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14
fs/exofs/exofs.h
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@@ -56,6 +56,9 @@
struct exofs_dev {
struct ore_dev ored;
unsigned did;
unsigned urilen;
uint8_t *uri;
struct kobject ed_kobj;
};
/*
* our extension to the in-memory superblock
@@ -73,6 +76,7 @@ struct exofs_sb_info {
struct ore_layout layout; /* Default files layout */
struct ore_comp one_comp; /* id & cred of partition id=0*/
struct ore_components oc; /* comps for the partition */
struct kobject s_kobj; /* holds per-sbi kobject */
};
/*
@@ -176,6 +180,16 @@ void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
const struct osd_obj_id *obj);
int exofs_sbi_write_stats(struct exofs_sb_info *sbi);
/* sys.c */
int exofs_sysfs_init(void);
void exofs_sysfs_uninit(void);
int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
struct exofs_dt_device_info *dt_dev);
void exofs_sysfs_sb_del(struct exofs_sb_info *sbi);
int exofs_sysfs_odev_add(struct exofs_dev *edev,
struct exofs_sb_info *sbi);
void exofs_sysfs_dbg_print(void);
/*********************
* operation vectors *
*********************/