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Linux Kernel
3.7.1
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Linux Kernel
3.7.1
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#include "ubifs.h"Go to the source code of this file.
| int dbg_check_cats | ( | struct ubifs_info * | c | ) |
| void dbg_check_heap | ( | struct ubifs_info * | c, |
| struct ubifs_lpt_heap * | heap, | ||
| int | cat, | ||
| int | add_pos | ||
| ) |
| int dbg_check_lprops | ( | struct ubifs_info * | c | ) |
dbg_check_lprops - check all LEB properties. : UBIFS file-system description object
This function checks all LEB properties and makes sure they are all correct. It returns zero if everything is fine, %-EINVAL if there is an inconsistency and other negative error codes in case of other errors. This function is called while the file system is locked (because of commit start), so no additional locking is required. Note that locking the LPT mutex would cause a circular lock dependency with the TNC mutex.
| void ubifs_add_to_cat | ( | struct ubifs_info * | c, |
| struct ubifs_lprops * | lprops, | ||
| int | cat | ||
| ) |
| int ubifs_calc_dark | ( | const struct ubifs_info * | c, |
| int | spc | ||
| ) |
ubifs_calc_dark - calculate LEB dark space size. : the UBIFS file-system description object : amount of free and dirty space in the LEB
This function calculates and returns amount of dark space in an LEB which has bytes of free and dirty space.
UBIFS is trying to account the space which might not be usable, and this space is called "dark space". For example, if an LEB has only %512 free bytes, it is dark space, because it cannot fit a large data node.
| int ubifs_categorize_lprops | ( | const struct ubifs_info * | c, |
| const struct ubifs_lprops * | lprops | ||
| ) |
ubifs_categorize_lprops - categorize LEB properties. : UBIFS file-system description object : LEB properties to categorize
LEB properties are categorized to enable fast find operations. This function returns the LEB category to which the LEB properties belong. Note however that if the LEB category is stored as a heap and the heap is full, the LEB properties may have their category changed to LPROPS_UNCAT.
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ubifs_change_lp - change LEB properties. : the UBIFS file-system description object : LEB properties to change : new free space amount : new dirty space amount : new flags : change to the count of list
This function changes LEB properties (, or ). However, the property which has the LPROPS_NC value is not changed. Returns a pointer to the updated LEB properties on success and a negative error code on failure.
Note, the LEB properties may have had to be copied (due to COW) and consequently the pointer returned may not be the same as the pointer passed.
| int ubifs_change_one_lp | ( | struct ubifs_info * | c, |
| int | lnum, | ||
| int | free, | ||
| int | dirty, | ||
| int | flags_set, | ||
| int | flags_clean, | ||
| int | idx_gc_cnt | ||
| ) |
ubifs_change_one_lp - change LEB properties. : the UBIFS file-system description object : LEB to change properties for : amount of free space : amount of dirty space : flags to set : flags to clean : change to the count of idx_gc list
This function changes properties of LEB . It is a helper wrapper over 'ubifs_change_lp()' which hides lprops get/release. The arguments are the same as in case of 'ubifs_change_lp()'. Returns zero in case of success and a negative error code in case of failure.
| void ubifs_ensure_cat | ( | struct ubifs_info * | c, |
| struct ubifs_lprops * | lprops | ||
| ) |
ubifs_ensure_cat - ensure LEB properties are categorized. : UBIFS file-system description object : LEB properties
A LEB may have fallen off of the bottom of a heap, and ended up as un-categorized even though it has enough space for us now. If that is the case this function will put the LEB back onto a heap.
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| void ubifs_get_lp_stats | ( | struct ubifs_info * | c, |
| struct ubifs_lp_stats * | lst | ||
| ) |
| int ubifs_read_one_lp | ( | struct ubifs_info * | c, |
| int | lnum, | ||
| struct ubifs_lprops * | lp | ||
| ) |
ubifs_read_one_lp - read LEB properties. : the UBIFS file-system description object : LEB to read properties for : where to store read properties
This helper function reads properties of a LEB and stores them in . Returns zero in case of success and a negative error code in case of failure.
| void ubifs_replace_cat | ( | struct ubifs_info * | c, |
| struct ubifs_lprops * | old_lprops, | ||
| struct ubifs_lprops * | new_lprops | ||
| ) |
ubifs_replace_cat - replace lprops in a category list or heap. : UBIFS file-system description object : LEB properties to replace : LEB properties with which to replace
During commit it is sometimes necessary to copy a pnode (see dirty_cow_pnode) and the lprops that the pnode contains. When that happens, references in category lists and heaps must be replaced. This function does that.
| int ubifs_update_one_lp | ( | struct ubifs_info * | c, |
| int | lnum, | ||
| int | free, | ||
| int | dirty, | ||
| int | flags_set, | ||
| int | flags_clean | ||
| ) |
ubifs_update_one_lp - update LEB properties. : the UBIFS file-system description object : LEB to change properties for : amount of free space : amount of dirty space to add : flags to set : flags to clean
This function is the same as 'ubifs_change_one_lp()' but is added to current dirty space, not substitutes it.
1.8.2