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3.3.18 Procedure 18: FSSTAT - Get dynamic file system information Connected: An Internet Encyclopedia
3.3.18 Procedure 18: FSSTAT - Get dynamic file system information

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Next: 3.3.19 Procedure 19: FSINFO - Get static file system Information

3.3.18 Procedure 18: FSSTAT - Get dynamic file system information

3.3.18 Procedure 18: FSSTAT - Get dynamic file system information

SYNOPSIS

      FSSTAT3res NFSPROC3_FSSTAT(FSSTAT3args) = 18;

      struct FSSTAT3args {
           nfs_fh3   fsroot;
      };

      struct FSSTAT3resok {
           post_op_attr obj_attributes;
           size3        tbytes;
           size3        fbytes;
           size3        abytes;
           size3        tfiles;
           size3        ffiles;
           size3        afiles;
           uint32       invarsec;
      };

      struct FSSTAT3resfail {
           post_op_attr obj_attributes;
      };

      union FSSTAT3res switch (nfsstat3 status) {
      case NFS3_OK:
           FSSTAT3resok   resok;
      default:
           FSSTAT3resfail resfail;
      };

DESCRIPTION

Procedure FSSTAT retrieves volatile file system state information. On entry, the arguments in FSSTAT3args are:

fsroot

A file handle identifying a object in the file system. This is normally a file handle for a mount point for a file system, as originally obtained from the MOUNT service on the server.

On successful return, FSSTAT3res.status is NFS3_OK and FSSTAT3res.resok contains:

obj_attributes

The attributes of the file system object specified in fsroot.

tbytes

The total size, in bytes, of the file system.

fbytes

The amount of free space, in bytes, in the file system.

abytes

The amount of free space, in bytes, available to the user identified by the authentication information in the RPC. (This reflects space that is reserved by the file system; it does not reflect any quota system implemented by the server.)

tfiles

The total number of file slots in the file system. (On a UNIX server, this often corresponds to the number of inodes configured.)

ffiles

The number of free file slots in the file system.

afiles

The number of free file slots that are available to the user corresponding to the authentication information in the RPC. (This reflects slots that are reserved by the file system; it does not reflect any quota system implemented by the server.)

invarsec

A measure of file system volatility: this is the number of seconds for which the file system is not expected to change. For a volatile, frequently updated file system, this will be 0. For an immutable file system, such as a CD-ROM, this would be the largest unsigned integer. For file systems that are infrequently modified, for example, one containing local executable programs and on-line documentation, a value corresponding to a few hours or days might be used. The client may use this as a hint in tuning its cache management. Note however, this measure is assumed to be dynamic and may change at any time.

Otherwise, FSSTAT3res.status contains the error on failure and FSSTAT3res.resfail contains the following:

obj_attributes

The attributes of the file system object specified in fsroot.

IMPLEMENTATION

Not all implementations can support the entire list of attributes. It is expected that servers will make a best effort at supporting all the attributes.

ERRORS

NFS3ERR_IO NFS3ERR_STALE NFS3ERR_BADHANDLE NFS3ERR_SERVERFAULT

SEE ALSO FSINFO.


Next: 3.3.19 Procedure 19: FSINFO - Get static file system Information

Connected: An Internet Encyclopedia
3.3.18 Procedure 18: FSSTAT - Get dynamic file system information

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