generic_writepages – walk the list of dirty pages of the given address space and writepage all of them. Synopsis int generic_writepages(struct address_space *mapping, struct writeback_control *wbc); Arguments mapping address space structure to write wbc subtract the number of written pages from *wbc->nr_to_write Description This is a library function, which implements the writepages address_space_operation. Copyright
generic_splice_sendpage – splice data from a pipe to a socket Synopsis ssize_t generic_splice_sendpage(struct pipe_inode_info * pipe, struct file * out, loff_t * ppos, size_t len, unsigned int flags); Arguments pipe pipe to splice from out socket to write to ppos position in out len number of bytes to splice flags splice modifier flags Description Will send len bytes from the pipe to a…
generic_shutdown_super – common helper for ->kill_sb Synopsis void generic_shutdown_super(struct super_block *sb); Arguments sb superblock to kill Description generic_shutdown_super does all fs-independent work on superblock shutdown. Typical ->kill_sb should pick all fs-specific objects that need destruction out of superblock, call generic_shutdown_super and release aforementioned objects. Note: dentries and inodes _are_ taken care of and do not…
generic_setlease – sets a lease on an open file Synopsis int generic_setlease(struct file *filp, long arg, struct file_lock **flp, void **priv); Arguments filp file pointer arg type of lease to obtain flp input – file_lock to use, output – file_lock inserted priv private data for lm_setup (may be NULL if lm_setup doesn’t require it) Description…
generic_pipe_buf_steal – attempt to take ownership of a pipe_buffer Synopsis int generic_pipe_buf_steal(struct pipe_inode_info *pipe, struct pipe_buffer *buf); Arguments pipe the pipe that the buffer belongs to buf the buffer to attempt to steal Description This function attempts to steal the struct page attached to buf. If successful, this function returns 0 and returns with the…
generic_pipe_buf_release – put a reference to a struct pipe_buffer Synopsis void generic_pipe_buf_release(struct pipe_inode_info *pipe, struct pipe_buffer *buf); Arguments pipe the pipe that the buffer belongs to buf the buffer to put a reference to Description This function releases a reference to buf. Copyright
generic_pipe_buf_get – get a reference to a struct pipe_buffer Synopsis void generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf); Arguments pipe the pipe that the buffer belongs to buf the buffer to get a reference to Description This function grabs an extra reference to buf. It’s used in in the tee system call, when we duplicate the…
generic_pipe_buf_confirm – verify contents of the pipe buffer Synopsis int generic_pipe_buf_confirm(struct pipe_inode_info *info, struct pipe_buffer *buf); Arguments info the pipe that the buffer belongs to buf the buffer to confirm Description This function does nothing, because the generic pipe code uses pages that are always good when inserted into the pipe. Copyright
generic_permission – check for access rights on a Posix-like filesystem Synopsis int generic_permission(struct inode *inode, int mask); Arguments inode inode to check access rights for mask right to check for (MAY_READ, MAY_WRITE, MAY_EXEC, …) Description Used to check for read/write/execute permissions on a file. We use “fsuid” for this, letting us set arbitrary permissions for…
generic_make_request – hand a buffer to its device driver for I/O Synopsis blk_qc_t generic_make_request(struct bio * bio); Arguments bio The bio describing the location in memory and on the device. Description generic_make_request is used to make I/O requests of block devices. It is passed a struct bio, which describes the I/O that needs to be done. generic_make_request…
generic_file_write_iter – write data to a file Synopsis ssize_t generic_file_write_iter(struct kiocb * iocb, struct iov_iter * from); Arguments iocb IO state structure from iov_iter with data to write Description This is a wrapper around __generic_file_write_iter to be used by most filesystems. It takes care of syncing the file in case of O_SYNC file and acquires i_mutex as needed. Copyright
generic_file_splice_read – splice data from file to a pipe Synopsis ssize_t generic_file_splice_read(struct file * in, loff_t * ppos, struct pipe_inode_info * pipe, size_t len, unsigned int flags); Arguments in file to splice from ppos position in in pipe pipe to splice to len number of bytes to splice flags splice modifier flags Description Will read pages from given file and fill them into…
generic_file_read_iter – generic filesystem read routine Synopsis ssize_t generic_file_read_iter(struct kiocb * iocb, struct iov_iter * iter); Arguments iocb kernel I/O control block iter destination for the data read Description This is the “read_iter” routine for all filesystems that can use the page cache directly. Copyright
gen_replace_estimator – replace rate estimator configuration Synopsis int gen_replace_estimator(struct gnet_stats_basic_packed *bstats, struct gnet_stats_basic_cpu __percpu *cpu_bstats, struct gnet_stats_rate_est64 *rate_est, spinlock_t *stats_lock, seqcount_t *running, struct nlattr *opt); Arguments bstats basic statistics cpu_bstats bstats per cpu rate_est rate estimator statistics stats_lock statistics lock running qdisc running seqcount (might be NULL) opt rate estimator configuration TLV Description Replaces the…
gen_new_estimator – create a new rate estimator Synopsis int gen_new_estimator(struct gnet_stats_basic_packed *bstats, struct gnet_stats_basic_cpu __percpu *cpu_bstats, struct gnet_stats_rate_est64 *rate_est, spinlock_t *stats_lock, seqcount_t *running, struct nlattr *opt); Arguments bstats basic statistics cpu_bstats bstats per cpu rate_est rate estimator statistics stats_lock statistics lock running qdisc running seqcount opt rate estimator configuration TLV Description Creates a new rate…
gen_kill_estimator – remove a rate estimator Synopsis void gen_kill_estimator(struct gnet_stats_basic_packed *bstats, struct gnet_stats_rate_est64 *rate_est); Arguments bstats basic statistics rate_est rate estimator statistics Description Removes the rate estimator specified by bstats and rate_est. Note Caller should respect an RCU grace period before freeing stats_lock Copyright
gen_estimator_active – test if estimator is currently in use Synopsis bool gen_estimator_active(const struct gnet_stats_basic_packed * bstats, const struct gnet_stats_rate_est64 * rate_est); Arguments bstats basic statistics rate_est rate estimator statistics Description Returns true if estimator is active, and false if not. Copyright
gdb_regs_to_pt_regs – Convert GDB regs to ptrace regs. Synopsis void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs); Arguments gdb_regs A pointer to hold the registers we’ve received from GDB. regs A pointer to a struct pt_regs to hold these values in. Description Convert the GDB regs in gdb_regs into the pt_regs, and store them in regs….
gadget_is_zlp_supported – return true iff the hardware supports zlp Synopsis int gadget_is_zlp_supported(struct usb_gadget *g); Arguments g controller to check for quirk Author David Brownell <dbrownell [at] users.sourceforge.net> Author. Copyright
gadget_is_superspeed_plus – return true if the hardware handles superspeed plus Synopsis int gadget_is_superspeed_plus(struct usb_gadget *g); Arguments g controller that might support superspeed plus Author David Brownell <dbrownell [at] users.sourceforge.net> Author. Copyright