PROBE::NFS.FOP.R(3stap) Network File Storage Tapsets PROBE::NFS.FOP.R(3stap)

# [NAME](#NAME)

probe::nfs.fop.read\_iter - NFS client read\_iter file operation

# [SYNOPSIS](#SYNOPSIS)

```
probe nfs.fop.read_iter {}
```

# [VALUES](#VALUES)

*attrtimeo*

how long the cached information is assumed to be valid. We need to revalidate the cached attrs for this inode if jiffies - read\_cache\_jiffies > attrtimeo.

*dev*

device identifier

*ino*

inode number

*cache\_valid*

cache related bit mask flag

*file\_name*

file name

*pos*

current position of file

*parent\_name*

parent dir name

*cache\_time*

when we started read-caching this inode

*count*

read bytes

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::nfs*(3stap)](/man/enterprise-packages/systemtap/tapset::nfs.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: probe::nfs.fop.read_iter(3stap) from systemtap 5.6-r1 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git