Linux Manuals session 9

jbd2_journal_check_available_features – Check feature set in journalling layer Synopsis int jbd2_journal_check_available_features(journal_t *journal, unsigned long compat, unsigned long ro, unsigned long incompat); Arguments journal Journal to check. compat bitmask of compatible features ro bitmask of features that force read-only mount incompat bitmask of incompatible features Description Check whether the journaling code supports the use of all…

jbd2_journal_ack_err – Ack journal err. Synopsis void jbd2_journal_ack_err(journal_t *journal); Arguments journal journal to act on. Description An error must be cleared or acked to take a FS out of readonly mode. Authors Roger Gammans <rgammans [at] computer-surgery.co.uk> Author. Stephen Tweedie <sct [at] redhat.com> Author. Copyright

jbd2_journal_abort – Shutdown the journal immediately. Synopsis void jbd2_journal_abort(journal_t *journal, int errno); Arguments journal the journal to shutdown. errno an error number to record in the journal indicating the reason for the shutdown. Description Perform a complete, immediate shutdown of the ENTIRE journal (not of a single transaction). This operation cannot be undone without closing…

jbd2__journal_start – Obtain a new handle. Synopsis handle_t * jbd2__journal_start(journal_t * journal, int nblocks, int rsv_blocks, gfp_t gfp_mask, unsigned int type, unsigned int line_no); Arguments journal Journal to start transaction on. nblocks number of block buffer we might modify rsv_blocks — undescribed — gfp_mask — undescribed — type — undescribed — line_no — undescribed — Description We make sure that the transaction…

jbd2__journal_restart – restart a handle . Synopsis int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask); Arguments handle handle to restart nblocks nr credits requested gfp_mask — undescribed — Description Restart a handle for a multi-transaction filesystem operation. If the jbd2_journal_extend call above fails to grant new buffer credits to a running handle, a call to jbd2_journal_restart…

iunique – get a unique inode number Synopsis ino_t iunique(struct super_block * sb, ino_t max_reserved); Arguments sb superblock max_reserved highest reserved inode number Description Obtain an inode number that is unique on the system for a given superblock. This is used by file systems that have no natural permanent inode numbering system. An inode number is returned that…

iterate_supers_type – call function for superblocks of given type Synopsis void iterate_supers_type(struct file_system_type *type, void (*f)(struct super_block *, void *), void *arg); Arguments type fs type f function to call arg argument to pass to it Description Scans the superblock list and calls given function, passing it locked superblock and given argument. Copyright

iter_file_splice_write – splice data from a pipe to a file Synopsis ssize_t iter_file_splice_write(struct pipe_inode_info * pipe, struct file * out, loff_t * ppos, size_t len, unsigned int flags); Arguments pipe pipe info out file to write to ppos position in out len number of bytes to splice flags splice modifier flags Description Will either move or copy pages (determined by flags options) from…

iscsi_unblock_session – set a session as logged in and start IO. Synopsis void iscsi_unblock_session(struct iscsi_cls_session *session); Arguments session iscsi session Description Mark a session as ready to accept IO. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

iscsi_session_event – send session destr. completion event Synopsis int iscsi_session_event(struct iscsi_cls_session *session, enum iscsi_uevent_e event); Arguments session iscsi class session event type of event Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

iscsi_scan_finished – helper to report when running scans are done Synopsis int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time); Arguments shost scsi host time scan run time Description This function can be used by drives like qla4xxx to report to the scsi layer when the scans it kicked off at module load time are done. Authors…

iscsi_find_flashnode_sess – finds flashnode session entry Synopsis struct device *iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data, int (*fn)(struct device *dev, void *data)); Arguments shost pointer to host data data pointer to data containing value to use for comparison fn function pointer that does actual comparison Description Finds the flashnode session object comparing the data passed using logic…

iscsi_find_flashnode_conn – finds flashnode connection entry Synopsis struct device *iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess); Arguments fnode_sess pointer to parent flashnode session entry Description Finds the flashnode connection object comparing the data passed using logic defined in passed function pointer Return pointer to found flashnode connection device object on success NULL on failure Authors James Bottomley <James.Bottomley [at]…

iscsi_destroy_session – destroy iscsi session Synopsis int iscsi_destroy_session(struct iscsi_cls_session *session); Arguments session iscsi_session Description Can be called by a LLD or iscsi_transport. There must not be any running connections. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

iscsi_destroy_flashnode_sess – destroy flashnode session entry Synopsis void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess); Arguments fnode_sess pointer to flashnode session entry to be destroyed Description Deletes the flashnode session entry and all children flashnode connection entries from sysfs Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

iscsi_destroy_conn – destroy iscsi class connection Synopsis int iscsi_destroy_conn(struct iscsi_cls_conn *conn); Arguments conn iscsi cls session Description This can be called from a LLD or iscsi_transport. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

iscsi_destroy_all_flashnode – destroy all flashnode session entries Synopsis void iscsi_destroy_all_flashnode(struct Scsi_Host *shost); Arguments shost pointer to host data Description Destroys all the flashnode session entries and all corresponding children flashnode connection entries from sysfs Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright

iscsi_create_session – create iscsi class session Synopsis struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, int dd_size, unsigned int target_id); Arguments shost scsi host transport iscsi transport dd_size private driver data size target_id which target Description This can be called from a LLD or iscsi_transport. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob…

iscsi_create_flashnode_sess – Add flashnode session entry in sysfs Synopsis struct iscsi_bus_flash_session *iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index, struct iscsi_transport *transport, int dd_size); Arguments shost pointer to host data index index of flashnode to add in sysfs transport pointer to transport data dd_size total size to allocate Description Adds a sysfs entry for the flashnode session attributes…

iscsi_create_flashnode_conn – Add flashnode conn entry in sysfs Synopsis struct iscsi_bus_flash_conn *iscsi_create_flashnode_conn(struct Scsi_Host *shost, struct iscsi_bus_flash_session *fnode_sess, struct iscsi_transport *transport, int dd_size); Arguments shost pointer to host data fnode_sess pointer to the parent flashnode session entry transport pointer to transport data dd_size total size to allocate Description Adds a sysfs entry for the flashnode connection…