ovl: reorder ovl_want_write() after ovl_inode_lock()

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Make the locking order of ovl_inode_lock() strictly between the two
vfs stacked layers, i.e.:
- ovl vfs locks: sb_writers, inode_lock, ...
- ovl_inode_lock
- upper vfs locks: sb_writers, inode_lock, ...

To that effect, move ovl_want_write() into the helpers ovl_nlink_start()
and ovl_copy_up_start which currently take the ovl_inode_lock() after
ovl_want_write().

Signed-off-by: Amir Goldstein <amir73il@gmail.com>

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This commit is contained in:

Amir Goldstein 2023-07-20 12:51:21 +03:00

parent d08d3b3c2c

commit 162d064440

5 changed files with 84 additions and 87 deletions

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13

fs/overlayfs/copy_up.c

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62

fs/overlayfs/dir.c

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7

fs/overlayfs/export.c

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57

fs/overlayfs/inode.c

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36

fs/overlayfs/util.c

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