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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-03-23 22:40:20 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-03-27 23:34:35 +0300 |
| commit | 660d1eb22301c290945450414fb0be5ae25526f1 (patch) | |
| tree | 10a3ec6b1066b3fade71ea9dc1abedabd49573ca /fs/nfs/flexfilelayout | |
| parent | e18c18ebd7c128346b532729792e21d97eeb15b0 (diff) | |
| download | linux-660d1eb22301c290945450414fb0be5ae25526f1.tar.xz | |
pNFS/flexfile: Don't merge layout segments if the mirrors don't match
Check that the number of mirrors, and the mirror information matches
before deciding to merge layout segments in pNFS/flexfiles.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/flexfilelayout')
| -rw-r--r-- | fs/nfs/flexfilelayout/flexfilelayout.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index d37883a2b51f..3221001f2ea1 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -284,6 +284,23 @@ static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls) } static bool +ff_lseg_match_mirrors(struct pnfs_layout_segment *l1, + struct pnfs_layout_segment *l2) +{ + const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1); + const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1); + u32 i; + + if (fl1->mirror_array_cnt != fl2->mirror_array_cnt) + return false; + for (i = 0; i < fl1->mirror_array_cnt; i++) { + if (fl1->mirror_array[i] != fl2->mirror_array[i]) + return false; + } + return true; +} + +static bool ff_lseg_range_is_after(const struct pnfs_layout_range *l1, const struct pnfs_layout_range *l2) { @@ -318,6 +335,8 @@ ff_lseg_merge(struct pnfs_layout_segment *new, new->pls_range.length); if (new_end < old->pls_range.offset) return false; + if (!ff_lseg_match_mirrors(new, old)) + return false; /* Mergeable: copy info from 'old' to 'new' */ if (new_end < old_end) |