Namjae Jeon <linkinj...@gmail.com> writes:

> From: Namjae Jeon <namjae.j...@samsung.com>
>
> update nfs option in filesystem/vfat.txt
>
> Signed-off-by: Namjae Jeon <namjae.j...@samsung.com>
> Signed-off-by: Ravishankar N <ravi...@samsung.com>
> Signed-off-by: Amit Sahrawat <a.sahra...@samsung.com>
> ---
>  Documentation/filesystems/vfat.txt |   23 ++++++++++++++++++-----
>  1 file changed, 18 insertions(+), 5 deletions(-)
>
> diff --git a/Documentation/filesystems/vfat.txt 
> b/Documentation/filesystems/vfat.txt
> index d230dd9..f663c70 100644
> --- a/Documentation/filesystems/vfat.txt
> +++ b/Documentation/filesystems/vfat.txt
> @@ -150,13 +150,26 @@ discard       -- If set, issues discard/TRIM commands 
> to the block
>                device when blocks are freed. This is useful for SSD devices
>                and sparse/thinly-provisoned LUNs.
>  
> -nfs           -- This option maintains an index (cache) of directory
> -              inodes by i_logstart which is used by the nfs-related code to
> -              improve look-ups.
> -
> -              Enable this only if you want to export the FAT filesystem
> +nfs= stale_rw|nostale_ro
> +           -- Enable this only if you want to export the FAT filesystem
>                over NFS
>  
> +              stale_rw:This option maintains an index (cache) of directory
> +              inodes by i_logstart which is used by the nfs-related code to
> +              improve look-ups.Full file operations (read/write) over NFS is 
> supported
> +              but with cache eviction at NFS server, this could result in 
> ESTALE issues.
> +
> +              nostale_ro:This option bases the inode number and filehandle 
> on the on-disk
> +              location of a file in the MS-DOS directory entry.This ensures 
> that ESTALE
> +              will not be returned after a file is evicted from the inode 
> cache. However,
> +              it means that operations such as rename, create and unlink 
> could cause
> +              filehandles that previously pointed at one file to point at a 
> different file,
> +              potentially causing data corruption. For this reason, this 
> option also mounts
> +              the filesystem readonly.
> +
> +              To maintain backward compatibility, '-o nfs' is also accepted, 
> defaulting to
> +              stale_rw

Please add whitespace after ":" and ".". And please care 80 columns.
-- 
OGAWA Hirofumi <hirof...@mail.parknet.co.jp>
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