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Fix zfs_get_data access to files with wrong generation

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If TX_WRITE is create on a file, and the file is later deleted and a new
directory is created on the same object id, it is possible that when
zil_commit happens, zfs_get_data will be called on the new directory.
This may result in panic as it tries to do range lock.

This patch fixes this issue by record the generation number during
zfs_log_write, so zfs_get_data can check if the object is valid.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@nutanix.com>
Closes #10593
Closes #11682
This commit is contained in:
Chunwei Chen
2021-03-19 22:53:31 -07:00
committed by Tony Hutter
parent ecb1b1a31d
commit bfb2928490
7 changed files with 28 additions and 8 deletions
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cmd/ztest/ztest.c
+2 -2
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@@ -2163,8 +2163,8 @@ ztest_get_done(zgd_t *zgd, int error)
}
static int
ztest_get_data(void *arg, lr_write_t *lr, char *buf, struct lwb *lwb,
zio_t *zio)
ztest_get_data(void *arg, uint64_t arg2, lr_write_t *lr, char *buf,
struct lwb *lwb, zio_t *zio)
{
ztest_ds_t *zd = arg;
objset_t *os = zd->zd_os;