455682ce54
Two cleanups: * si->cur_comp, si->cur_pg where always calculated after the call to ore_calc_stripe_info() with the help of _dev_order(...). But these are already calculated by ore_calc_stripe_info() and can be just set there. (This is left over from the time that si->cur_comp, si->cur_pg were only used by raid code, but now the main loop manages them anyway even though they are ultimately not used in none raid code) * si->cur_comp - For the very last stripe case, was set inside _ore_add_parity_unit(). This is not clear and will be wrong for coming raid6 so move this to only caller. Now si->cur_comp is only manipulated within _prepare_for_striping(), always next to the manipulation of cur_dev. Which is much easier to understand and follow. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/*
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* Copyright (C) from 2011
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* Boaz Harrosh <bharrosh@panasas.com>
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*
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* This file is part of the objects raid engine (ore).
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*
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* It is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* You should have received a copy of the GNU General Public License
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* along with "ore". If not, write to the Free Software Foundation, Inc:
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* "Free Software Foundation <info@fsf.org>"
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*/
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#include <scsi/osd_ore.h>
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#define ORE_ERR(fmt, a...) printk(KERN_ERR "ore: " fmt, ##a)
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#ifdef CONFIG_EXOFS_DEBUG
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#define ORE_DBGMSG(fmt, a...) \
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printk(KERN_NOTICE "ore @%s:%d: " fmt, __func__, __LINE__, ##a)
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#else
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#define ORE_DBGMSG(fmt, a...) \
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do { if (0) printk(fmt, ##a); } while (0)
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#endif
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/* u64 has problems with printk this will cast it to unsigned long long */
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#define _LLU(x) (unsigned long long)(x)
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#define ORE_DBGMSG2(M...) do {} while (0)
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/* #define ORE_DBGMSG2 ORE_DBGMSG */
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/* ios_raid.c stuff needed by ios.c */
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int _ore_post_alloc_raid_stuff(struct ore_io_state *ios);
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void _ore_free_raid_stuff(struct ore_io_state *ios);
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void _ore_add_sg_seg(struct ore_per_dev_state *per_dev, unsigned cur_len,
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bool not_last);
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int _ore_add_parity_unit(struct ore_io_state *ios, struct ore_striping_info *si,
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struct ore_per_dev_state *per_dev, unsigned cur_len);
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void _ore_add_stripe_page(struct __stripe_pages_2d *sp2d,
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struct ore_striping_info *si, struct page *page);
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static inline void _add_stripe_page(struct __stripe_pages_2d *sp2d,
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struct ore_striping_info *si, struct page *page)
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{
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if (!sp2d) /* Inline the fast path */
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return; /* Hay no raid stuff */
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_ore_add_stripe_page(sp2d, si, page);
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}
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/* ios.c stuff needed by ios_raid.c */
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int _ore_get_io_state(struct ore_layout *layout,
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struct ore_components *oc, unsigned numdevs,
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unsigned sgs_per_dev, unsigned num_par_pages,
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struct ore_io_state **pios);
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int _ore_add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg,
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unsigned pgbase, struct page **pages,
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struct ore_per_dev_state *per_dev, int cur_len);
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int _ore_read_mirror(struct ore_io_state *ios, unsigned cur_comp);
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int ore_io_execute(struct ore_io_state *ios);
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