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author | Neil Brown <neilb@suse.de> | 2008-07-12 20:28:33 +1000 |
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committer | Neil Brown <neilb@suse.de> | 2008-07-12 20:28:33 +1000 |
commit | 6416d5275d65be25a6cd63583bb2b92e6fba95a5 (patch) | |
tree | 23757b31666774c05c405dfd720dc92b3bb03b90 /Grow.c | |
parent | 908ef18519f7d5780ebf00b19b913f8282eb4175 (diff) | |
download | mdadm-6416d5275d65be25a6cd63583bb2b92e6fba95a5.tar.gz mdadm-6416d5275d65be25a6cd63583bb2b92e6fba95a5.tar.xz mdadm-6416d5275d65be25a6cd63583bb2b92e6fba95a5.zip |
Use O_DIRECT for all IO to devices.
Using buffered IO risks non-atomic updates to parts of the
device that we don't actually want to write to. This isn't in
general safe.
So switch to O_DIRECT for all that IO and make sure we have
properly aligned buffers.
Diffstat (limited to 'Grow.c')
-rw-r--r-- | Grow.c | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -69,7 +69,7 @@ int Grow_Add_device(char *devname, int fd, char *newdev) return 1; } - nfd = open(newdev, O_RDWR|O_EXCL); + nfd = open(newdev, O_RDWR|O_EXCL|O_DIRECT); if (nfd < 0) { fprintf(stderr, Name ": cannot open %s\n", newdev); return 1; |