fuse: implement statx

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Allow querying btime.  When btime is requested in mask, then FUSE_STATX
request is sent.  Otherwise keep using FUSE_GETATTR.

The userspace interface for statx matches that of the statx(2) API.
However there are limitations on how this interface is used:

 - returned basic stats and btime are used, stx_attributes, etc. are
   ignored

 - always query basic stats and btime, regardless of what was requested

 - requested sync type is ignored, the default is passed to the server

 - if server returns with some attributes missing from the result_mask,
   then no attributes will be cached

 - btime is not cached yet (next patch will fix that)

For new inodes initialize fi->inval_mask to "all invalid", instead of "all
valid" as previously.  Also only clear basic stats from inval_mask when
caching attributes.  This will result in the caching logic not thinking
that btime is cached.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

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This commit is contained in:

Miklos Szeredi 2023-08-10 12:45:05 +02:00

parent 9dc10a54ab

commit d3045530bd

3 changed files with 107 additions and 7 deletions

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106

fs/fuse/dir.c

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3

fs/fuse/fuse_i.h

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5

fs/fuse/inode.c

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