scst: Port to Linux kernel v6.5 #178
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Enable exclusive opening of block devices to prevent concurrent usage. Additionally, remove the redundant 'holder' argument for 'blkdev_get_by_path()' where exclusive opening isn't utilized.
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Support for the following block layer changes in the Linux kernel v6.5:
- 05bdb9965305 ("block: replace fmode_t with a block-specific type for
block open flags")
- 0718afd47f70 ("block: introduce holder ops")
- 2736e8eeb0cc ("block: use the holder as indication for exclusive opens")
Support for the following scsi core changes in the Linux kernel v6.5:
- a6cdc35fab0d ("scsi: core: Support retrieving sub-pages of mode
pages")
Support for the following mm layer changes in the Linux kernel v6.5:
- 54d020692b34 ("mm/gup: remove unused vmas parameter from
get_user_pages()")
This patch introduces several improvements to the write_data() function: 1. Remove the redundant 'sendpage' function pointer variable. 2. Update variables related to size to use the size_t type for better type correctness and safety. 3. Introduce a new variable, 'parent_req', to store the 'write_cmnd->parent_req' pointer and reduce redundant accesses. 4. Fix several checkpatch warnings. This patch doesn't change any functionality.
This patch introduces several improvements to the 'write iop loop' in the write_data() function: 1. Move iop-related variables under the scope of the 'write iop loop'. 2. Eliminate the 'retry' label, use 'continue' instead for simplicity. 3. Remove the redundant 'rest' variable, use just 'res' instead. This patch doesn't change any functionality.
This patch carries out a refactoring of the sendpage functionality in the write_data() function: 1. Reorganize the logic used to select the sock_sendpage function. 2. Streamline the data sending loop by reducing conditional branches and eliminating labels. 3. Adjust the error handling for -EINTR and -EAGAIN to make the code cleaner and easier to follow. This patch doesn't change any functionality.
Use sendmsg() conditionally with MSG_SPLICE_PAGES in write_data()
rather than calling sendpage().
Support for the following net layer changes in the Linux kernel v6.5:
- dc97391e6610 ("sock: Remove ->sendpage*() in favour of
sendmsg(MSG_SPLICE_PAGES)")
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