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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101// SPDX-License-Identifier: GPL-2.0/* * Some non-inline ceph helpers */#include <linux/module.h>#include <linux/ceph/types.h>
/* * return true if @layout appears to be valid */int ceph_file_layout_is_valid(const struct ceph_file_layout *layout){ __u32 su = layout->stripe_unit; __u32 sc = layout->stripe_count; __u32 os = layout->object_size;
/* stripe unit, object size must be non-zero, 64k increment */ if (!su || (su & (CEPH_MIN_STRIPE_UNIT-1))) return 0; if (!os || (os & (CEPH_MIN_STRIPE_UNIT-1))) return 0; /* object size must be a multiple of stripe unit */ if (os < su || os % su) return 0; /* stripe count must be non-zero */ if (!sc) return 0; return 1;}
void ceph_file_layout_from_legacy(struct ceph_file_layout *fl, struct ceph_file_layout_legacy *legacy){ fl->stripe_unit = le32_to_cpu(legacy->fl_stripe_unit); fl->stripe_count = le32_to_cpu(legacy->fl_stripe_count); fl->object_size = le32_to_cpu(legacy->fl_object_size); fl->pool_id = le32_to_cpu(legacy->fl_pg_pool); if (fl->pool_id == 0 && fl->stripe_unit == 0 && fl->stripe_count == 0 && fl->object_size == 0) fl->pool_id = -1;}
void ceph_file_layout_to_legacy(struct ceph_file_layout *fl, struct ceph_file_layout_legacy *legacy){ legacy->fl_stripe_unit = cpu_to_le32(fl->stripe_unit); legacy->fl_stripe_count = cpu_to_le32(fl->stripe_count); legacy->fl_object_size = cpu_to_le32(fl->object_size); if (fl->pool_id >= 0) legacy->fl_pg_pool = cpu_to_le32(fl->pool_id); else legacy->fl_pg_pool = 0;}
int ceph_flags_to_mode(int flags){ int mode;
#ifdef O_DIRECTORY /* fixme */ if ((flags & O_DIRECTORY) == O_DIRECTORY) return CEPH_FILE_MODE_PIN;#endif
switch (flags & O_ACCMODE) { case O_WRONLY: mode = CEPH_FILE_MODE_WR; break; case O_RDONLY: mode = CEPH_FILE_MODE_RD; break; case O_RDWR: case O_ACCMODE: /* this is what the VFS does */ mode = CEPH_FILE_MODE_RDWR; break; }#ifdef O_LAZY if (flags & O_LAZY) mode |= CEPH_FILE_MODE_LAZY;#endif
return mode;}
int ceph_caps_for_mode(int mode){ int caps = CEPH_CAP_PIN;
if (mode & CEPH_FILE_MODE_RD) caps |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE; if (mode & CEPH_FILE_MODE_WR) caps |= CEPH_CAP_FILE_EXCL | CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL | CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL; if (mode & CEPH_FILE_MODE_LAZY) caps |= CEPH_CAP_FILE_LAZYIO;
return caps;}